From 71fef458e1f4205d6c593d48983a21e1ff8d7c68 Mon Sep 17 00:00:00 2001
From: Alexandre Duret-Lutz <adl@lrde.epita.fr>
Date: Wed, 4 Dec 2019 23:05:51 +0100
Subject: [PATCH] python: define our own SVG DisplayObject

This is to workaround differences in minidom's pretty-printing that
occurred between Python 3.7 and 3.8.

* python/spot/jupyter.py (SVG): New class.
* python/spot/__init__.py: Use it.
* tests/python/_altscc.ipynb, tests/python/alternation.ipynb,
tests/python/automata.ipynb, tests/python/formulas.ipynb,
tests/python/gen.ipynb, tests/python/highlighting.ipynb,
tests/python/ltsmin-dve.ipynb, tests/python/ltsmin-pml.ipynb,
tests/python/product.ipynb, tests/python/randaut.ipynb,
tests/python/testingaut.ipynb, tests/python/twagraph-internals.ipynb,
tests/python/word.ipynb: Adjust.
---
 python/spot/__init__.py               |   10 +-
 python/spot/jupyter.py                |   17 +-
 tests/python/_altscc.ipynb            |  704 +--
 tests/python/alternation.ipynb        | 4444 +++++++-------
 tests/python/automata.ipynb           | 2967 +++++-----
 tests/python/formulas.ipynb           |  250 +-
 tests/python/gen.ipynb                |  849 +--
 tests/python/highlighting.ipynb       | 2478 ++++----
 tests/python/ltsmin-dve.ipynb         | 1446 ++---
 tests/python/ltsmin-pml.ipynb         |  929 ++-
 tests/python/product.ipynb            | 2319 ++++----
 tests/python/randaut.ipynb            | 3638 ++++++------
 tests/python/testingaut.ipynb         |  759 +--
 tests/python/twagraph-internals.ipynb | 7886 +++++++++++++------------
 tests/python/word.ipynb               |  210 +-
 15 files changed, 14765 insertions(+), 14141 deletions(-)

diff --git a/python/spot/__init__.py b/python/spot/__init__.py
index 738070b67..cb7044fdf 100644
--- a/python/spot/__init__.py
+++ b/python/spot/__init__.py
@@ -150,7 +150,7 @@ class twa:
         # Load the SVG function only if we need it. This way the
         # bindings can still be used outside of IPython if IPython is
         # not installed.
-        from IPython.display import SVG
+        from spot.jupyter import SVG
         return SVG(self._repr_svg_(opt))
 
     def highlight_states(self, states, color):
@@ -212,7 +212,7 @@ class twa_graph:
     def show_storage(self, opt=None):
         ostr = ostringstream()
         self.dump_storage_as_dot(ostr, opt)
-        from IPython.display import SVG
+        from spot.jupyter import SVG
         return SVG(_ostream_to_svg(ostr))
 
 
@@ -237,7 +237,7 @@ class formula:
         # Load the SVG function only if we need it. This way the bindings
         # can still be used outside of IPython if IPython is not
         # installed.
-        from IPython.display import SVG
+        from spot.jupyter import SVG
         return SVG(_str_to_svg(self.to_str('d')))
 
     def _repr_latex_(self):
@@ -1169,7 +1169,7 @@ def show_mp_hierarchy(cl):
     Return a picture of the Manna & Pnueli hierarchy as an SVG object
     in the IPython/Jupyter.
     """
-    from IPython.display import SVG
+    from spot.jupyter import SVG
     return SVG(mp_hierarchy_svg(cl))
 
 
@@ -1278,7 +1278,7 @@ class twa_word:
         """
         Display the word as an SVG picture of signals.
         """
-        from IPython.display import SVG
+        from spot.jupyter import SVG
         return SVG(self.as_svg())
 
 
diff --git a/python/spot/jupyter.py b/python/spot/jupyter.py
index fdd312399..ea16c865d 100644
--- a/python/spot/jupyter.py
+++ b/python/spot/jupyter.py
@@ -21,8 +21,23 @@
 Auxiliary functions for Spot's Python bindings.
 """
 
-from IPython.display import display, HTML
+from IPython.display import display, HTML, DisplayObject
 
+class SVG(DisplayObject):
+    """
+    Replacement for IPython.display.SVG that does not use
+    minidom to extract the <svg> element.
+
+    We need that because prior to Python 3.8, minidom used
+    sort all attributes, and in Python 3.8 this was changed
+    to keep the same order, causing test failures in our
+    diff-based test suite.
+
+    We do not need the <svg> extraction when processing
+    GraphViz output.
+    """
+    def _repr_svg_(self):
+        return self.data
 
 def display_inline(*args, per_row=None, show=None):
     """
diff --git a/tests/python/_altscc.ipynb b/tests/python/_altscc.ipynb
index 90e89013e..f23d48dfc 100644
--- a/tests/python/_altscc.ipynb
+++ b/tests/python/_altscc.ipynb
@@ -29,88 +29,88 @@
        "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>\n",
        "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\"\n",
        " \"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\">\n",
-       "<!-- Generated by graphviz version 2.40.1 (20161225.0304)\n",
+       "<!-- Generated by graphviz version 2.43.0 (0)\n",
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        " viewBox=\"0.00 0.00 221.60 212.00\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\">\n",
-       "<g id=\"graph0\" class=\"graph\" transform=\"scale(1 1) rotate(0) translate(4 208)\">\n",
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-       "<text text-anchor=\"start\" x=\"85.8\" y=\"-189.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">Inf(</text>\n",
+       "<g id=\"graph0\" class=\"graph\" transform=\"scale(1.0 1.0) rotate(0) translate(4 208)\">\n",
+       "<polygon fill=\"white\" stroke=\"transparent\" points=\"-4,4 -4,-208 217.6,-208 217.6,4 -4,4\"/>\n",
+       "<text text-anchor=\"start\" x=\"85.8\" y=\"-189.8\" font-family=\"Lato\" font-size=\"14.00\">Inf(</text>\n",
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-       "<text text-anchor=\"start\" x=\"83.8\" y=\"-175.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">[Büchi]</text>\n",
+       "<text text-anchor=\"start\" x=\"123.8\" y=\"-189.8\" font-family=\"Lato\" font-size=\"14.00\">)</text>\n",
+       "<text text-anchor=\"start\" x=\"83.8\" y=\"-175.8\" font-family=\"Lato\" font-size=\"14.00\">[Büchi]</text>\n",
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        "<title>&#45;1</title>\n",
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        "</svg>\n"
       ],
       "text/plain": [
-       "<spot.impl.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f4e38f190c0> >"
+       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7fa0243a6e10> >"
       ]
      },
      "execution_count": 2,
@@ -154,81 +154,81 @@
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    ]
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+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": []
   }
  ],
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diff --git a/tests/python/alternation.ipynb b/tests/python/alternation.ipynb
index 8fda293bb..499187f15 100644
--- a/tests/python/alternation.ipynb
+++ b/tests/python/alternation.ipynb
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diff --git a/tests/python/automata.ipynb b/tests/python/automata.ipynb
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+       "<title>6&#45;&gt;2</title>\n",
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        "<!-- 3 -->\n",
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+       "<title>6&#45;&gt;3</title>\n",
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        "<!-- 4 -->\n",
-       "<g class=\"node\" id=\"node7\">\n",
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+       "<title>6&#45;&gt;4</title>\n",
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        "<!-- 5 -->\n",
-       "<g class=\"node\" id=\"node8\">\n",
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+       "<ellipse fill=\"#ffffaa\" stroke=\"black\" cx=\"432.93\" cy=\"-117\" rx=\"18\" ry=\"18\"/>\n",
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        "<!-- 6&#45;&gt;5 -->\n",
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-       "<title>6-&gt;5</title>\n",
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+       "<title>6&#45;&gt;5</title>\n",
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        "<!-- 0&#45;&gt;0 -->\n",
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        "<!-- 1&#45;&gt;1 -->\n",
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+       "<title>1&#45;&gt;1</title>\n",
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+       "<title>2&#45;&gt;2</title>\n",
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+       "<title>3&#45;&gt;0</title>\n",
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@@ -3667,7 +3734,7 @@
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diff --git a/tests/python/formulas.ipynb b/tests/python/formulas.ipynb
index e0970be44..de64bbc09 100644
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+++ b/tests/python/formulas.ipynb
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diff --git a/tests/python/gen.ipynb b/tests/python/gen.ipynb
index 832daddde..f945514d5 100644
--- a/tests/python/gen.ipynb
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+       "<title>1&#45;&gt;0</title>\n",
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@@ -1232,7 +1253,7 @@
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diff --git a/tests/python/highlighting.ipynb b/tests/python/highlighting.ipynb
index ea078e125..012187ac9 100644
--- a/tests/python/highlighting.ipynb
+++ b/tests/python/highlighting.ipynb
@@ -48,89 +48,96 @@
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+       "<title>6&#45;&gt;7</title>\n",
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-       "<text fill=\"#1f78b4\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"687\" y=\"-311.8\">⓿</text>\n",
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+       "<title>7&#45;&gt;4</title>\n",
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+       "<text text-anchor=\"start\" x=\"576\" y=\"-296.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#1f78b4\">⓿</text>\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"750\" y=\"-248.8\">!b &amp; !c</text>\n",
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+       "<title>7&#45;&gt;6</title>\n",
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        "<!-- 7&#45;&gt;7 -->\n",
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+       "<title>7&#45;&gt;7</title>\n",
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        "<!-- 1&#45;&gt;4 -->\n",
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+       "<title>1&#45;&gt;4</title>\n",
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+       "<title>2&#45;&gt;4</title>\n",
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+       "<title>2&#45;&gt;1</title>\n",
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+       "<title>2&#45;&gt;2</title>\n",
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        "<!-- 5 -->\n",
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-       "<title>2-&gt;5</title>\n",
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+       "<title>2&#45;&gt;5</title>\n",
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diff --git a/tests/python/ltsmin-dve.ipynb b/tests/python/ltsmin-dve.ipynb
index 60747217b..ec346e1b7 100644
--- a/tests/python/ltsmin-dve.ipynb
+++ b/tests/python/ltsmin-dve.ipynb
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        "<!-- 2 -->\n",
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+       "<g id=\"edge3\" class=\"edge\">\n",
+       "<title>0&#45;&gt;2</title>\n",
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        "<!-- 3 -->\n",
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        "<!-- 4 -->\n",
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+       "<g id=\"edge5\" class=\"edge\">\n",
+       "<title>1&#45;&gt;4</title>\n",
+       "<path fill=\"none\" stroke=\"black\" d=\"M515.64,-205.41C535.17,-202.77 555.74,-199.99 575.5,-197.31\"/>\n",
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        "<!-- 2&#45;&gt;4 -->\n",
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+       "<g id=\"edge6\" class=\"edge\">\n",
+       "<title>2&#45;&gt;4</title>\n",
+       "<path fill=\"none\" stroke=\"black\" d=\"M514.13,-160.12C534.13,-162.83 555.28,-165.69 575.57,-168.44\"/>\n",
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        "<!-- 5 -->\n",
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        "<!-- 2&#45;&gt;5 -->\n",
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-       "<title>2-&gt;5</title>\n",
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+       "<g id=\"edge7\" class=\"edge\">\n",
+       "<title>2&#45;&gt;5</title>\n",
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        "<!-- 6 -->\n",
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        "<!-- 11 -->\n",
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        "<!-- 12 -->\n",
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        "<!-- 5 -->\n",
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-       "<title>2-&gt;5</title>\n",
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+       "<title>2&#45;&gt;5</title>\n",
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        "<!-- 6 -->\n",
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        "<!-- 7 -->\n",
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+       "<g id=\"edge9\" class=\"edge\">\n",
+       "<title>3&#45;&gt;7</title>\n",
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+       "<title>4&#45;&gt;7</title>\n",
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        "<!-- 8 -->\n",
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        "<!-- 9 -->\n",
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        "<!-- 10 -->\n",
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        "<!-- 11 -->\n",
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        "<!-- 7&#45;&gt;11 -->\n",
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        "<!-- 12 -->\n",
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        "<!-- 7&#45;&gt;12 -->\n",
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+       "<g id=\"edge17\" class=\"edge\">\n",
+       "<title>7&#45;&gt;12</title>\n",
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        "<!-- 8&#45;&gt;12 -->\n",
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+       "<g id=\"edge18\" class=\"edge\">\n",
+       "<title>8&#45;&gt;12</title>\n",
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        "<!-- 13 -->\n",
-       "<g class=\"node\" id=\"node15\">\n",
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        "<!-- 8&#45;&gt;13 -->\n",
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-       "<title>8-&gt;13</title>\n",
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+       "<g id=\"edge19\" class=\"edge\">\n",
+       "<title>8&#45;&gt;13</title>\n",
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        "<!-- 14 -->\n",
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+       "<text text-anchor=\"start\" x=\"1174.03\" y=\"-120.67\" font-family=\"Lato\" font-size=\"14.00\">a=1, b=2, Q=1</text>\n",
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        "<!-- 8&#45;&gt;14 -->\n",
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+       "<g id=\"edge20\" class=\"edge\">\n",
+       "<title>8&#45;&gt;14</title>\n",
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        "<!-- 15 -->\n",
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+       "<text text-anchor=\"start\" x=\"1174.03\" y=\"-30.67\" font-family=\"Lato\" font-size=\"14.00\">a=0, b=3, Q=1</text>\n",
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        "<!-- 9&#45;&gt;15 -->\n",
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+       "<g id=\"edge21\" class=\"edge\">\n",
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        "<!-- 10&#45;&gt;14 -->\n",
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+       "<g id=\"edge22\" class=\"edge\">\n",
+       "<title>10&#45;&gt;14</title>\n",
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        "<!-- 11&#45;&gt;11 -->\n",
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        "<!-- 16 -->\n",
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        "<!-- 17 -->\n",
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        "<!-- 18 -->\n",
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        "<!-- 19 -->\n",
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        "<!-- 20 -->\n",
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        "<!-- 21 -->\n",
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@@ -2026,7 +2040,7 @@
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diff --git a/tests/python/ltsmin-pml.ipynb b/tests/python/ltsmin-pml.ipynb
index bf2d51539..ac430ec06 100644
--- a/tests/python/ltsmin-pml.ipynb
+++ b/tests/python/ltsmin-pml.ipynb
@@ -38,8 +38,8 @@
       "SpinS Promela Compiler - version 1.1 (3-Feb-2015)\n",
       "(C) University of Twente, Formal Methods and Tools group\n",
       "\n",
-      "Parsing tmps8i1kbv6.pml...\n",
-      "Parsing tmps8i1kbv6.pml done (0.0 sec)\n",
+      "Parsing tmpb2gyak36.pml...\n",
+      "Parsing tmpb2gyak36.pml done (0.0 sec)\n",
       "\n",
       "Optimizing graphs...\n",
       "   StateMerging changed 0 states/transitions.\n",
@@ -223,10 +223,10 @@
       "   [..................................................]\n",
       "   [..................................................]\n",
       "   Found          2 /          2 (100.0%) Commuting actions               \n",
-      "Generating guard dependency matrices done (0.0 sec)\n",
+      "Generating guard dependency matrices done (0.1 sec)\n",
       "\n",
-      "Written C code to /home/adl/git/spot/tests/python/tmps8i1kbv6.pml.spins.c\n",
-      "Compiled C code to PINS library tmps8i1kbv6.pml.spins\n",
+      "Written C code to /home/adl/git/spot/tests/python/tmpb2gyak36.pml.spins.c\n",
+      "Compiled C code to PINS library tmpb2gyak36.pml.spins\n",
       "\n"
      ]
     }
@@ -291,276 +291,276 @@
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        "<!-- 5 -->\n",
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        "<!-- 6 -->\n",
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+       "<title>3&#45;&gt;6</title>\n",
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        "<!-- 7 -->\n",
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        "<!-- 8 -->\n",
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        "<!-- 4&#45;&gt;8 -->\n",
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+       "<title>4&#45;&gt;8</title>\n",
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        "<!-- 9 -->\n",
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        "<!-- 10 -->\n",
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        "<!-- 11 -->\n",
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        "<!-- 11 -->\n",
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diff --git a/tests/python/product.ipynb b/tests/python/product.ipynb
index 269ef1f8a..5b60aae79 100644
--- a/tests/python/product.ipynb
+++ b/tests/python/product.ipynb
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-       "</svg>"
+       "</svg>\n"
       ],
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-       "<IPython.core.display.SVG object>"
+       "<spot.jupyter.SVG object>"
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      "metadata": {},
@@ -2419,34 +2458,18 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 11,
+   "execution_count": null,
    "metadata": {},
-   "outputs": [
-    {
-     "name": "stdout",
-     "output_type": "stream",
-     "text": [
-      "200 µs ± 2.74 µs per loop (mean ± std. dev. of 7 runs, 1000 loops each)\n"
-     ]
-    }
-   ],
+   "outputs": [],
    "source": [
     "%timeit product3(a1, a2)"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": 12,
+   "execution_count": null,
    "metadata": {},
-   "outputs": [
-    {
-     "name": "stdout",
-     "output_type": "stream",
-     "text": [
-      "3.35 µs ± 52.4 ns per loop (mean ± std. dev. of 7 runs, 100000 loops each)\n"
-     ]
-    }
-   ],
+   "outputs": [],
    "source": [
     "%timeit spot.product(a1, a2)"
    ]
@@ -2486,7 +2509,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.6.7"
+   "version": "3.7.5"
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  "nbformat": 4,
diff --git a/tests/python/randaut.ipynb b/tests/python/randaut.ipynb
index 966ff94c3..b6ba6d195 100644
--- a/tests/python/randaut.ipynb
+++ b/tests/python/randaut.ipynb
@@ -28,2516 +28,2676 @@
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        "<!-- 3 -->\n",
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+       "<title>1&#45;&gt;0</title>\n",
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+       "<title>1&#45;&gt;1</title>\n",
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+       "<title>1&#45;&gt;4</title>\n",
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        "<!-- 2 -->\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"320.5\" y=\"-144.3\">2</text>\n",
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-       "<title>1-&gt;2</title>\n",
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+       "<title>1&#45;&gt;2</title>\n",
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-       "<title>4-&gt;2</title>\n",
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+       "<title>4&#45;&gt;2</title>\n",
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+       "<title>2&#45;&gt;4</title>\n",
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-       "<title>2-&gt;3</title>\n",
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+       "<title>2&#45;&gt;3</title>\n",
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+       "<title>3&#45;&gt;1</title>\n",
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-       "<title>3-&gt;4</title>\n",
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-       "<title>3-&gt;2</title>\n",
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+       "<title>0&#45;&gt;0</title>\n",
+       "<path fill=\"none\" stroke=\"black\" d=\"M49.62,-192.09C48.32,-201.91 50.45,-211.05 56,-211.05 60.17,-211.05 62.4,-205.91 62.71,-199.19\"/>\n",
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        "<!-- 1 -->\n",
-       "<g class=\"node\" id=\"node3\">\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"196.5\" y=\"-105.3875\">1</text>\n",
+       "<ellipse fill=\"#ffffaa\" stroke=\"black\" cx=\"196.5\" cy=\"-109.05\" rx=\"18\" ry=\"18\"/>\n",
+       "<text text-anchor=\"middle\" x=\"196.5\" y=\"-105.35\" font-family=\"Lato\" font-size=\"14.00\">1</text>\n",
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-       "<title>0-&gt;1</title>\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"92\" y=\"-161.8875\">!p0 &amp; !p1</text>\n",
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+       "<title>0&#45;&gt;1</title>\n",
+       "<path fill=\"none\" stroke=\"black\" d=\"M72.66,-167.4C78.7,-164.46 85.67,-161.09 92,-158.05 119.98,-144.63 152.32,-129.36 173.3,-119.48\"/>\n",
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+       "<text text-anchor=\"start\" x=\"92\" y=\"-161.85\" font-family=\"Lato\" font-size=\"14.00\">!p0 &amp; !p1</text>\n",
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        "<!-- 4 -->\n",
-       "<g class=\"node\" id=\"node4\">\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"626\" y=\"-124.3875\">4</text>\n",
+       "<ellipse fill=\"#ffffaa\" stroke=\"black\" cx=\"626\" cy=\"-128.05\" rx=\"18\" ry=\"18\"/>\n",
+       "<text text-anchor=\"middle\" x=\"626\" y=\"-124.35\" font-family=\"Lato\" font-size=\"14.00\">4</text>\n",
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        "<!-- 0&#45;&gt;4 -->\n",
-       "<g class=\"edge\" id=\"edge4\">\n",
-       "<title>0-&gt;4</title>\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"312\" y=\"-241.8875\">p0 &amp; !p1</text>\n",
+       "<g id=\"edge4\" class=\"edge\">\n",
+       "<title>0&#45;&gt;4</title>\n",
+       "<path fill=\"none\" stroke=\"black\" d=\"M70.34,-186.42C76.62,-191.38 84.39,-196.98 92,-201.05 135.08,-224.09 146.65,-238.05 195.5,-238.05 195.5,-238.05 195.5,-238.05 486.5,-238.05 535.35,-238.05 553.71,-233.75 590,-201.05 604.3,-188.16 613.32,-168.15 618.62,-152.34\"/>\n",
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+       "<text text-anchor=\"start\" x=\"312\" y=\"-241.85\" font-family=\"Lato\" font-size=\"14.00\">p0 &amp; !p1</text>\n",
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        "<!-- 3 -->\n",
-       "<g class=\"node\" id=\"node5\">\n",
+       "<g id=\"node5\" class=\"node\">\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"339.5\" y=\"-36.3875\">3</text>\n",
+       "<ellipse fill=\"#ffffaa\" stroke=\"black\" cx=\"339.5\" cy=\"-40.05\" rx=\"18\" ry=\"18\"/>\n",
+       "<text text-anchor=\"middle\" x=\"339.5\" y=\"-36.35\" font-family=\"Lato\" font-size=\"14.00\">3</text>\n",
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        "<!-- 1&#45;&gt;3 -->\n",
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-       "<title>1-&gt;3</title>\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"242\" y=\"-72.8875\">p0 &amp; p1</text>\n",
+       "<g id=\"edge5\" class=\"edge\">\n",
+       "<title>1&#45;&gt;3</title>\n",
+       "<path fill=\"none\" stroke=\"black\" d=\"M209.18,-95.86C217.55,-87.15 229.5,-76.07 242,-69.05 264.95,-56.15 294.27,-48.39 314.54,-44.19\"/>\n",
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+       "<text text-anchor=\"start\" x=\"242\" y=\"-72.85\" font-family=\"Lato\" font-size=\"14.00\">p0 &amp; p1</text>\n",
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        "<!-- 4&#45;&gt;0 -->\n",
-       "<g class=\"edge\" id=\"edge14\">\n",
-       "<title>4-&gt;0</title>\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"312\" y=\"-190.8875\">!p0 &amp; p1</text>\n",
+       "<g id=\"edge14\" class=\"edge\">\n",
+       "<title>4&#45;&gt;0</title>\n",
+       "<path fill=\"none\" stroke=\"black\" d=\"M610.89,-138.6C586.75,-155.57 535.37,-187.05 486.5,-187.05 195.5,-187.05 195.5,-187.05 195.5,-187.05 155.35,-187.05 108.89,-181.98 81.28,-178.43\"/>\n",
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+       "<text text-anchor=\"start\" x=\"312\" y=\"-190.85\" font-family=\"Lato\" font-size=\"14.00\">!p0 &amp; p1</text>\n",
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        "<!-- 4&#45;&gt;1 -->\n",
-       "<g class=\"edge\" id=\"edge13\">\n",
-       "<title>4-&gt;1</title>\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"385\" y=\"-127.8875\">!p0 &amp; p1</text>\n",
+       "<g id=\"edge13\" class=\"edge\">\n",
+       "<title>4&#45;&gt;1</title>\n",
+       "<path fill=\"none\" stroke=\"black\" d=\"M607.67,-128.04C588.81,-127.99 557.76,-127.79 531,-127.05 402.48,-123.48 370.18,-124.12 242,-114.05 235.28,-113.52 228.02,-112.78 221.34,-112.03\"/>\n",
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        "<!-- 2 -->\n",
-       "<g class=\"node\" id=\"node6\">\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"485.5\" y=\"-58.3875\">2</text>\n",
+       "<ellipse fill=\"#ffffaa\" stroke=\"black\" cx=\"485.5\" cy=\"-62.05\" rx=\"18\" ry=\"18\"/>\n",
+       "<text text-anchor=\"middle\" x=\"485.5\" y=\"-58.35\" font-family=\"Lato\" font-size=\"14.00\">2</text>\n",
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        "<!-- 4&#45;&gt;2 -->\n",
-       "<g class=\"edge\" id=\"edge12\">\n",
-       "<title>4-&gt;2</title>\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"533\" y=\"-115.8875\">p0 &amp; !p1</text>\n",
+       "<g id=\"edge12\" class=\"edge\">\n",
+       "<title>4&#45;&gt;2</title>\n",
+       "<path fill=\"none\" stroke=\"black\" d=\"M609.34,-120.83C603.3,-118.07 596.34,-114.89 590,-112.05 563.86,-100.31 556.74,-98.64 531,-86.05 523.39,-82.33 515.2,-78 507.94,-74.06\"/>\n",
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+       "<text text-anchor=\"start\" x=\"533\" y=\"-115.85\" font-family=\"Lato\" font-size=\"14.00\">p0 &amp; !p1</text>\n",
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-       "<title>3-&gt;0</title>\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"169\" y=\"-70.8875\">p0 &amp; !p1</text>\n",
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+       "<title>3&#45;&gt;0</title>\n",
+       "<path fill=\"none\" stroke=\"black\" d=\"M321.44,-39.62C289.77,-39.49 220.44,-42.34 169,-67.05 130.14,-85.72 121.97,-95.06 92,-126.05 83.85,-134.48 76.13,-144.92 70.02,-154\"/>\n",
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-       "<g class=\"edge\" id=\"edge9\">\n",
-       "<title>3-&gt;4</title>\n",
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-       "<text fill=\"#1f78b4\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"477.5\" y=\"-8.8875\">⓿</text>\n",
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+       "<title>3&#45;&gt;4</title>\n",
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+       "<text text-anchor=\"start\" x=\"458\" y=\"-23.85\" font-family=\"Lato\" font-size=\"14.00\">p0 &amp; !p1</text>\n",
+       "<text text-anchor=\"start\" x=\"477.5\" y=\"-8.85\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#1f78b4\">⓿</text>\n",
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-       "<g class=\"edge\" id=\"edge11\">\n",
-       "<title>3-&gt;2</title>\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"385\" y=\"-57.8875\">p0 &amp; !p1</text>\n",
+       "<g id=\"edge11\" class=\"edge\">\n",
+       "<title>3&#45;&gt;2</title>\n",
+       "<path fill=\"none\" stroke=\"black\" d=\"M357.58,-42.66C383.13,-46.56 431.4,-53.94 460.48,-58.38\"/>\n",
+       "<polygon fill=\"black\" stroke=\"black\" points=\"467.44,-59.44 460.04,-61.5 463.98,-58.91 460.52,-58.38 460.52,-58.38 460.52,-58.38 463.98,-58.91 460.99,-55.27 467.44,-59.44 467.44,-59.44\"/>\n",
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-       "<g class=\"edge\" id=\"edge6\">\n",
-       "<title>2-&gt;1</title>\n",
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+       "<g id=\"edge6\" class=\"edge\">\n",
+       "<title>2&#45;&gt;1</title>\n",
+       "<path fill=\"none\" stroke=\"black\" d=\"M467.68,-66.61C459.39,-68.75 449.21,-71.23 440,-73.05 360.66,-88.71 265.5,-100.95 221.72,-106.23\"/>\n",
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+       "<text text-anchor=\"start\" x=\"313.5\" y=\"-96.85\" font-family=\"Lato\" font-size=\"14.00\">p0 &amp; p1</text>\n",
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-       "<title>2-&gt;4</title>\n",
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+       "<title>2&#45;&gt;4</title>\n",
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+       "<title>2&#45;&gt;2</title>\n",
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        "<!-- 3 -->\n",
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+       "<title>2&#45;&gt;1</title>\n",
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+       "<title>I&#45;&gt;0</title>\n",
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        "<!-- 3 -->\n",
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+       "<text text-anchor=\"start\" x=\"92\" y=\"-87.8\" font-family=\"Lato\" font-size=\"14.00\">!p0 &amp; !p1</text>\n",
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+       "<title>3&#45;&gt;0</title>\n",
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-       "<g class=\"node\" id=\"node5\">\n",
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-       "<title>I-&gt;0</title>\n",
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+       "<g id=\"edge1\" class=\"edge\">\n",
+       "<title>I&#45;&gt;0</title>\n",
+       "<path fill=\"none\" stroke=\"black\" d=\"M1.15,-66.25C2.79,-66.25 17.15,-66.25 30.63,-66.25\"/>\n",
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        "<!-- 0&#45;&gt;0 -->\n",
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-       "<title>0-&gt;0</title>\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"28.5\" y=\"-120.0469\">p0 &amp; !p1</text>\n",
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+       "<title>0&#45;&gt;0</title>\n",
+       "<path fill=\"none\" stroke=\"black\" d=\"M49.62,-83.28C48.32,-93.11 50.45,-102.25 56,-102.25 60.17,-102.25 62.4,-97.11 62.71,-90.39\"/>\n",
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+       "<text text-anchor=\"start\" x=\"28.5\" y=\"-120.05\" font-family=\"Lato\" font-size=\"14.00\">p0 &amp; !p1</text>\n",
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        "<!-- 1 -->\n",
-       "<g class=\"node\" id=\"node3\">\n",
+       "<g id=\"node3\" class=\"node\">\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"191.5\" y=\"-161.5469\">1</text>\n",
+       "<ellipse fill=\"#ffffaa\" stroke=\"black\" cx=\"191.5\" cy=\"-165.25\" rx=\"18\" ry=\"18\"/>\n",
+       "<text text-anchor=\"middle\" x=\"191.5\" y=\"-161.55\" font-family=\"Lato\" font-size=\"14.00\">1</text>\n",
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        "<!-- 0&#45;&gt;1 -->\n",
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-       "<title>0-&gt;1</title>\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"92\" y=\"-156.0469\">p0 &amp; p1</text>\n",
-       "<text fill=\"#1f78b4\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"110\" y=\"-141.0469\">⓿</text>\n",
+       "<g id=\"edge3\" class=\"edge\">\n",
+       "<title>0&#45;&gt;1</title>\n",
+       "<path fill=\"none\" stroke=\"black\" d=\"M68.25,-79.71C74.78,-87.1 83.39,-96.18 92,-103.25 116.52,-123.38 148.01,-142.14 168.7,-153.64\"/>\n",
+       "<polygon fill=\"black\" stroke=\"black\" points=\"175.02,-157.11 167.37,-156.5 171.95,-155.42 168.88,-153.74 168.88,-153.74 168.88,-153.74 171.95,-155.42 170.4,-150.97 175.02,-157.11 175.02,-157.11\"/>\n",
+       "<text text-anchor=\"start\" x=\"92\" y=\"-158.05\" font-family=\"Lato\" font-size=\"14.00\">p0 &amp; p1</text>\n",
+       "<text text-anchor=\"start\" x=\"110\" y=\"-143.05\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#1f78b4\">⓿</text>\n",
        "</g>\n",
        "<!-- 4 -->\n",
-       "<g class=\"node\" id=\"node4\">\n",
+       "<g id=\"node4\" class=\"node\">\n",
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-       "<ellipse cx=\"343.5\" cy=\"-122.2469\" fill=\"#ffffaa\" rx=\"18\" ry=\"18\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"343.5\" y=\"-118.5469\">4</text>\n",
+       "<ellipse fill=\"#ffffaa\" stroke=\"black\" cx=\"343.5\" cy=\"-122.25\" rx=\"18\" ry=\"18\"/>\n",
+       "<text text-anchor=\"middle\" x=\"343.5\" y=\"-118.55\" font-family=\"Lato\" font-size=\"14.00\">4</text>\n",
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        "<!-- 1&#45;&gt;4 -->\n",
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-       "<title>1-&gt;4</title>\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"239\" y=\"-168.0469\">!p0 &amp; !p1</text>\n",
+       "<g id=\"edge4\" class=\"edge\">\n",
+       "<title>1&#45;&gt;4</title>\n",
+       "<path fill=\"none\" stroke=\"black\" d=\"M209.54,-165.84C230.91,-166.01 268.34,-164.44 298,-153.25 307.08,-149.82 316.07,-144.12 323.56,-138.54\"/>\n",
+       "<polygon fill=\"black\" stroke=\"black\" points=\"329.48,-133.93 325.89,-140.72 326.72,-136.08 323.96,-138.24 323.96,-138.24 323.96,-138.24 326.72,-136.08 322.02,-135.75 329.48,-133.93 329.48,-133.93\"/>\n",
+       "<text text-anchor=\"start\" x=\"239\" y=\"-168.05\" font-family=\"Lato\" font-size=\"14.00\">!p0 &amp; !p1</text>\n",
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        "<!-- 2 -->\n",
-       "<g class=\"node\" id=\"node5\">\n",
+       "<g id=\"node5\" class=\"node\">\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"627\" y=\"-82.5469\">2</text>\n",
+       "<ellipse fill=\"#ffffaa\" stroke=\"black\" cx=\"627\" cy=\"-86.25\" rx=\"18\" ry=\"18\"/>\n",
+       "<text text-anchor=\"middle\" x=\"627\" y=\"-82.55\" font-family=\"Lato\" font-size=\"14.00\">2</text>\n",
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-       "<title>1-&gt;2</title>\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"390.5\" y=\"-189.0469\">p0 &amp; p1</text>\n",
+       "<g id=\"edge5\" class=\"edge\">\n",
+       "<title>1&#45;&gt;2</title>\n",
+       "<path fill=\"none\" stroke=\"black\" d=\"M208,-172.91C216.85,-176.85 228.28,-181.24 239,-183.25 264.78,-188.06 271.8,-184.28 298,-183.25 394.22,-179.47 420.38,-188.78 514,-166.25 550.03,-157.57 561.89,-157.18 591,-134.25 600.08,-127.09 607.92,-117 613.87,-107.91\"/>\n",
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+       "<text text-anchor=\"start\" x=\"390.5\" y=\"-185.05\" font-family=\"Lato\" font-size=\"14.00\">p0 &amp; p1</text>\n",
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        "<!-- 4&#45;&gt;0 -->\n",
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-       "<title>4-&gt;0</title>\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"162\" y=\"-108.0469\">!p0 &amp; !p1</text>\n",
-       "<text fill=\"#ff4da0\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"183.5\" y=\"-93.0469\">❶</text>\n",
+       "<g id=\"edge12\" class=\"edge\">\n",
+       "<title>4&#45;&gt;0</title>\n",
+       "<path fill=\"none\" stroke=\"black\" d=\"M326.2,-116.07C317.86,-113.08 307.49,-109.64 298,-107.25 219.8,-87.55 124.92,-74.5 81.2,-69.09\"/>\n",
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+       "<text text-anchor=\"start\" x=\"162\" y=\"-108.05\" font-family=\"Lato\" font-size=\"14.00\">!p0 &amp; !p1</text>\n",
+       "<text text-anchor=\"start\" x=\"183.5\" y=\"-93.05\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#ff4da0\">❶</text>\n",
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        "<!-- 4&#45;&gt;1 -->\n",
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-       "<title>4-&gt;1</title>\n",
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-       "<text fill=\"#1f78b4\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"260.5\" y=\"-123.0469\">⓿</text>\n",
+       "<g id=\"edge10\" class=\"edge\">\n",
+       "<title>4&#45;&gt;1</title>\n",
+       "<path fill=\"none\" stroke=\"black\" d=\"M325.99,-117.78C304.92,-112.95 267.76,-107.42 239,-119.25 226.18,-124.52 215.02,-135.22 206.84,-144.97\"/>\n",
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+       "<text text-anchor=\"start\" x=\"241\" y=\"-138.05\" font-family=\"Lato\" font-size=\"14.00\">!p0 &amp; p1</text>\n",
+       "<text text-anchor=\"start\" x=\"260.5\" y=\"-123.05\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#1f78b4\">⓿</text>\n",
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        "<!-- 4&#45;&gt;2 -->\n",
-       "<g class=\"edge\" id=\"edge11\">\n",
-       "<title>4-&gt;2</title>\n",
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-       "<text fill=\"#6a3d9a\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"480\" y=\"-136.0469\">❸</text>\n",
+       "<g id=\"edge11\" class=\"edge\">\n",
+       "<title>4&#45;&gt;2</title>\n",
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+       "<text text-anchor=\"start\" x=\"462\" y=\"-151.05\" font-family=\"Lato\" font-size=\"14.00\">p0 &amp; p1</text>\n",
+       "<text text-anchor=\"start\" x=\"480\" y=\"-136.05\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#6a3d9a\">❸</text>\n",
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-       "<g class=\"node\" id=\"node6\">\n",
+       "<g id=\"node6\" class=\"node\">\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"488\" y=\"-58.5469\">3</text>\n",
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+       "<text text-anchor=\"middle\" x=\"488\" y=\"-58.55\" font-family=\"Lato\" font-size=\"14.00\">3</text>\n",
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-       "<title>4-&gt;3</title>\n",
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+       "<g id=\"edge13\" class=\"edge\">\n",
+       "<title>4&#45;&gt;3</title>\n",
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+       "<text text-anchor=\"start\" x=\"400.5\" y=\"-93.05\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#ff4da0\">❶</text>\n",
+       "<text text-anchor=\"start\" x=\"416.5\" y=\"-93.05\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#6a3d9a\">❸</text>\n",
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-       "<g class=\"edge\" id=\"edge6\">\n",
-       "<title>2-&gt;0</title>\n",
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+       "<g id=\"edge6\" class=\"edge\">\n",
+       "<title>2&#45;&gt;0</title>\n",
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-       "<g class=\"edge\" id=\"edge7\">\n",
-       "<title>2-&gt;3</title>\n",
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+       "<title>4&#45;&gt;1</title>\n",
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        "</g>\n",
        "</g>\n",
-       "</svg></TD></TR></TABLE>"
+       "</svg>\n",
+       "</TD></TR></TABLE>"
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@@ -2573,7 +2733,7 @@
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    "pygments_lexer": "ipython3",
-   "version": "3.6.5"
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diff --git a/tests/python/testingaut.ipynb b/tests/python/testingaut.ipynb
index 13fb79d72..7dd2de302 100644
--- a/tests/python/testingaut.ipynb
+++ b/tests/python/testingaut.ipynb
@@ -31,60 +31,60 @@
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+       "<title>0&#45;&gt;1</title>\n",
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        "<!-- 2 -->\n",
-       "<g class=\"node\" id=\"node3\">\n",
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        "<title>2</title>\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"540.9691\" y=\"-185.8\">!a &amp; b</text>\n",
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+       "<text text-anchor=\"middle\" x=\"540.97\" y=\"-200.8\" font-family=\"Lato\" font-size=\"14.00\">0</text>\n",
+       "<text text-anchor=\"middle\" x=\"540.97\" y=\"-185.8\" font-family=\"Lato\" font-size=\"14.00\">!a &amp; b</text>\n",
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        "<!-- 1&#45;&gt;2 -->\n",
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-       "<title>1-&gt;2</title>\n",
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+       "<title>1&#45;&gt;2</title>\n",
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+       "<text text-anchor=\"middle\" x=\"322.21\" y=\"-356.8\" font-family=\"Lato\" font-size=\"14.00\">!a &amp; b</text>\n",
        "</g>\n",
        "<!-- 3 -->\n",
-       "<g class=\"node\" id=\"node4\">\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"250.3553\" y=\"-159.8\">0</text>\n",
-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"250.3553\" y=\"-144.8\">a &amp; b</text>\n",
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+       "<text text-anchor=\"middle\" x=\"250.36\" y=\"-159.8\" font-family=\"Lato\" font-size=\"14.00\">0</text>\n",
+       "<text text-anchor=\"middle\" x=\"250.36\" y=\"-144.8\" font-family=\"Lato\" font-size=\"14.00\">a &amp; b</text>\n",
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-       "<title>1-&gt;3</title>\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"180\" y=\"-221.8\">a &amp; b</text>\n",
+       "<g id=\"edge3\" class=\"edge\">\n",
+       "<title>1&#45;&gt;3</title>\n",
+       "<path fill=\"none\" stroke=\"black\" d=\"M136.85,-238.85C157.77,-223.45 192.79,-197.66 218.21,-178.94\"/>\n",
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        "</g>\n",
        "<!-- 4 -->\n",
-       "<g class=\"node\" id=\"node5\">\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"396.1873\" y=\"-200.8\">0</text>\n",
-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"396.1873\" y=\"-185.8\">a &amp; !b</text>\n",
+       "<ellipse fill=\"#ffffaa\" stroke=\"black\" cx=\"396.19\" cy=\"-197\" rx=\"37.45\" ry=\"26.74\"/>\n",
+       "<text text-anchor=\"middle\" x=\"396.19\" y=\"-200.8\" font-family=\"Lato\" font-size=\"14.00\">0</text>\n",
+       "<text text-anchor=\"middle\" x=\"396.19\" y=\"-185.8\" font-family=\"Lato\" font-size=\"14.00\">a &amp; !b</text>\n",
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        "<!-- 1&#45;&gt;4 -->\n",
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-       "<title>1-&gt;4</title>\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"250.3553\" y=\"-240.8\">a &amp; !b</text>\n",
+       "<g id=\"edge4\" class=\"edge\">\n",
+       "<title>1&#45;&gt;4</title>\n",
+       "<path fill=\"none\" stroke=\"black\" d=\"M144.88,-248.75C186.53,-243.23 270.85,-230.86 340.71,-213 345.2,-211.85 349.88,-210.59 354.53,-209.28\"/>\n",
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        "<!-- 5 -->\n",
-       "<g class=\"node\" id=\"node6\">\n",
+       "<g id=\"node6\" class=\"node\">\n",
        "<title>5</title>\n",
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-       "<ellipse cx=\"687.6295\" cy=\"-147\" fill=\"none\" rx=\"39.2112\" ry=\"30.7407\" stroke=\"#000000\"/>\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"687.6295\" y=\"-135.8\">a &amp; b</text>\n",
+       "<ellipse fill=\"#ffffaa\" stroke=\"black\" cx=\"687.63\" cy=\"-147\" rx=\"35.23\" ry=\"26.76\"/>\n",
+       "<ellipse fill=\"none\" stroke=\"black\" cx=\"687.63\" cy=\"-147\" rx=\"39.21\" ry=\"30.74\"/>\n",
+       "<text text-anchor=\"middle\" x=\"687.63\" y=\"-150.8\" font-family=\"Lato\" font-size=\"14.00\">1</text>\n",
+       "<text text-anchor=\"middle\" x=\"687.63\" y=\"-135.8\" font-family=\"Lato\" font-size=\"14.00\">a &amp; b</text>\n",
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        "<!-- 2&#45;&gt;5 -->\n",
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-       "<title>2-&gt;5</title>\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"614.7742\" y=\"-179.8\">{a}</text>\n",
+       "<g id=\"edge5\" class=\"edge\">\n",
+       "<title>2&#45;&gt;5</title>\n",
+       "<path fill=\"none\" stroke=\"black\" d=\"M575.16,-185.53C595.79,-178.4 622.52,-169.16 644.62,-161.52\"/>\n",
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        "<!-- 6 -->\n",
-       "<g class=\"node\" id=\"node7\">\n",
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-       "<ellipse cx=\"835.4615\" cy=\"-148\" fill=\"#ffffaa\" rx=\"37.4556\" ry=\"26.7574\" stroke=\"#000000\"/>\n",
-       "<ellipse cx=\"835.4615\" cy=\"-148\" fill=\"none\" rx=\"41.4533\" ry=\"30.7407\" stroke=\"#000000\"/>\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"835.4615\" y=\"-136.8\">!a &amp; b</text>\n",
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+       "<ellipse fill=\"none\" stroke=\"black\" cx=\"835.46\" cy=\"-148\" rx=\"41.45\" ry=\"30.74\"/>\n",
+       "<text text-anchor=\"middle\" x=\"835.46\" y=\"-151.8\" font-family=\"Lato\" font-size=\"14.00\">1</text>\n",
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        "<!-- 2&#45;&gt;6 -->\n",
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-       "<title>2-&gt;6</title>\n",
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+       "<g id=\"edge6\" class=\"edge\">\n",
+       "<title>2&#45;&gt;6</title>\n",
+       "<path fill=\"none\" stroke=\"black\" d=\"M574.75,-209.11C612.29,-221.14 675.27,-235.72 726.98,-220 755.27,-211.4 782.88,-192.61 803.03,-176.38\"/>\n",
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        "<!-- 7 -->\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"988.2433\" y=\"-49.8\">a &amp; !b</text>\n",
+       "<ellipse fill=\"#ffffaa\" stroke=\"black\" cx=\"988.24\" cy=\"-61\" rx=\"37.46\" ry=\"26.76\"/>\n",
+       "<ellipse fill=\"none\" stroke=\"black\" cx=\"988.24\" cy=\"-61\" rx=\"41.45\" ry=\"30.74\"/>\n",
+       "<text text-anchor=\"middle\" x=\"988.24\" y=\"-64.8\" font-family=\"Lato\" font-size=\"14.00\">1</text>\n",
+       "<text text-anchor=\"middle\" x=\"988.24\" y=\"-49.8\" font-family=\"Lato\" font-size=\"14.00\">a &amp; !b</text>\n",
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        "<!-- 2&#45;&gt;7 -->\n",
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-       "<title>2-&gt;7</title>\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"760.4848\" y=\"-76.8\">{a, b}</text>\n",
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+       "<title>2&#45;&gt;7</title>\n",
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        "<!-- 8 -->\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"988.2433\" y=\"-257.8\">!a &amp; !b</text>\n",
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+       "<ellipse fill=\"none\" stroke=\"black\" cx=\"988.24\" cy=\"-269\" rx=\"44.11\" ry=\"30.74\"/>\n",
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+       "<text text-anchor=\"middle\" x=\"988.24\" y=\"-257.8\" font-family=\"Lato\" font-size=\"14.00\">!a &amp; !b</text>\n",
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-       "<title>2-&gt;8</title>\n",
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+       "<title>2&#45;&gt;8</title>\n",
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-       "<title>3-&gt;2</title>\n",
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+       "<g id=\"edge10\" class=\"edge\">\n",
+       "<title>3&#45;&gt;2</title>\n",
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+       "<title>3&#45;&gt;5</title>\n",
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+       "<title>3&#45;&gt;6</title>\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"614.7742\" y=\"-3.8\">{b}</text>\n",
+       "<g id=\"edge15\" class=\"edge\">\n",
+       "<title>3&#45;&gt;7</title>\n",
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+       "<g id=\"edge16\" class=\"edge\">\n",
+       "<title>3&#45;&gt;8</title>\n",
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        "<!-- 9 -->\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"540.9691\" y=\"-278.8\">0</text>\n",
-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"540.9691\" y=\"-263.8\">!a &amp; !b</text>\n",
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+       "<text text-anchor=\"middle\" x=\"540.97\" y=\"-278.8\" font-family=\"Lato\" font-size=\"14.00\">0</text>\n",
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+       "<title>3&#45;&gt;9</title>\n",
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        "<!-- 4&#45;&gt;2 -->\n",
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-       "<title>4-&gt;2</title>\n",
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+       "<title>4&#45;&gt;2</title>\n",
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+       "<title>4&#45;&gt;3</title>\n",
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+       "<title>4&#45;&gt;4</title>\n",
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-       "<title>4-&gt;9</title>\n",
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+       "<title>4&#45;&gt;9</title>\n",
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-       "<title>5-&gt;5</title>\n",
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+       "<title>5&#45;&gt;5</title>\n",
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-       "<title>5-&gt;6</title>\n",
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+       "<title>5&#45;&gt;6</title>\n",
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+       "<title>4&#45;&gt;3</title>\n",
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+       "<polygon fill=\"none\" stroke=\"black\" points=\"631,-44 569,-44 569,0 631,0 631,-44\"/>\n",
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-       "<g class=\"edge\" id=\"edge5\">\n",
-       "<title>2-&gt;5</title>\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"543\" y=\"-64.8\">{a}</text>\n",
+       "<g id=\"edge5\" class=\"edge\">\n",
+       "<title>2&#45;&gt;5</title>\n",
+       "<path fill=\"none\" stroke=\"black\" d=\"M517.14,-71.27C530.8,-63.05 547.73,-52.86 562.64,-43.88\"/>\n",
+       "<polygon fill=\"black\" stroke=\"black\" points=\"568.89,-40.12 564.52,-46.43 565.89,-41.92 562.9,-43.73 562.9,-43.73 562.9,-43.73 565.89,-41.92 561.27,-41.03 568.89,-40.12 568.89,-40.12\"/>\n",
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-       "<title>3-&gt;2</title>\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"369\" y=\"-75.8\">{a}</text>\n",
+       "<g id=\"edge6\" class=\"edge\">\n",
+       "<title>3&#45;&gt;2</title>\n",
+       "<path fill=\"none\" stroke=\"black\" d=\"M269.03,-80.64C274.93,-79.71 281.17,-78.78 287,-78 335.09,-71.56 347.64,-68.12 396,-72 415.83,-73.59 437.81,-77.05 455.42,-80.25\"/>\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"305.5\" y=\"-89.8\">{b}</text>\n",
+       "<g id=\"edge7\" class=\"edge\">\n",
+       "<title>3&#45;&gt;4</title>\n",
+       "<path fill=\"none\" stroke=\"black\" d=\"M269.08,-81.75C285.23,-80.6 306.21,-80.7 324,-86 331.29,-88.17 338.53,-91.93 344.97,-96.01\"/>\n",
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-       "<title>3-&gt;5</title>\n",
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+       "<g id=\"edge8\" class=\"edge\">\n",
+       "<title>3&#45;&gt;5</title>\n",
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        "<!-- 4&#45;&gt;2 -->\n",
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-       "<title>4-&gt;2</title>\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"429.5\" y=\"-106.8\">{a, b}</text>\n",
+       "<g id=\"edge10\" class=\"edge\">\n",
+       "<title>4&#45;&gt;2</title>\n",
+       "<path fill=\"none\" stroke=\"black\" d=\"M394.95,-108.34C412.67,-104.32 436.65,-98.88 455.97,-94.49\"/>\n",
+       "<polygon fill=\"black\" stroke=\"black\" points=\"462.85,-92.93 456.72,-97.55 459.44,-93.71 456.02,-94.48 456.02,-94.48 456.02,-94.48 459.44,-93.71 455.33,-91.41 462.85,-92.93 462.85,-92.93\"/>\n",
+       "<text text-anchor=\"middle\" x=\"429.5\" y=\"-106.8\" font-family=\"Lato\" font-size=\"14.00\">{a, b}</text>\n",
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-       "<title>4-&gt;3</title>\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"305.5\" y=\"-111.8\">{b}</text>\n",
+       "<g id=\"edge9\" class=\"edge\">\n",
+       "<title>4&#45;&gt;3</title>\n",
+       "<path fill=\"none\" stroke=\"black\" d=\"M342.21,-111.13C326.16,-109.03 305.2,-105.72 287,-101 283.45,-100.08 279.79,-98.99 276.16,-97.81\"/>\n",
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+       "<text text-anchor=\"middle\" x=\"305.5\" y=\"-111.8\" font-family=\"Lato\" font-size=\"14.00\">{b}</text>\n",
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        "<!-- 5&#45;&gt;5 -->\n",
-       "<g class=\"edge\" id=\"edge11\">\n",
-       "<title>5-&gt;5</title>\n",
-       "<path d=\"M589.6256,-44.2124C588.7762,-53.7952 592.2344,-62 600,-62 605.7029,-62 609.0827,-57.5751 610.1395,-51.4291\" fill=\"none\" stroke=\"#000000\"/>\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"600\" y=\"-65.8\">{a}</text>\n",
+       "<g id=\"edge11\" class=\"edge\">\n",
+       "<title>5&#45;&gt;5</title>\n",
+       "<path fill=\"none\" stroke=\"black\" d=\"M589.63,-44.21C588.78,-53.8 592.23,-62 600,-62 605.7,-62 609.08,-57.58 610.14,-51.43\"/>\n",
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+       "<text text-anchor=\"middle\" x=\"600\" y=\"-65.8\" font-family=\"Lato\" font-size=\"14.00\">{a}</text>\n",
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        "</g>\n",
-       "</svg>"
+       "</svg>\n"
       ],
       "text/plain": [
-       "<IPython.core.display.SVG object>"
+       "<spot.jupyter.SVG object>"
       ]
      },
      "execution_count": 5,
@@ -720,7 +741,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.6.5"
+   "version": "3.7.5"
   }
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  "nbformat": 4,
diff --git a/tests/python/twagraph-internals.ipynb b/tests/python/twagraph-internals.ipynb
index dcd5d3588..654aa7343 100644
--- a/tests/python/twagraph-internals.ipynb
+++ b/tests/python/twagraph-internals.ipynb
@@ -53,105 +53,105 @@
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-       "<text text-anchor=\"start\" x=\"65.75\" y=\"-185.397\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">[Rabin 1]</text>\n",
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+       "<text text-anchor=\"start\" x=\"539.5\" y=\"-244.8\" font-family=\"Times,serif\" font-size=\"14.00\">1</text>\n",
        "</g>\n",
        "<!-- meta -->\n",
-       "<g class=\"node\" id=\"node3\">\n",
+       "<g id=\"node3\" class=\"node\">\n",
        "<title>meta</title>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"10.5\" y=\"-123.8\">init_state:</text>\n",
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-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"78.5\" y=\"-123.8\">0</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"10.5\" y=\"-104.8\">num_sets:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"78.5\" y=\"-104.8\">2</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"10.5\" y=\"-85.8\">acceptance:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"78.5\" y=\"-85.8\">Fin(0) &amp; Inf(1)</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"10.5\" y=\"-66.8\">ap_vars:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"78.5\" y=\"-66.8\">b a</text>\n",
+       "<text text-anchor=\"start\" x=\"10.5\" y=\"-123.8\" font-family=\"Times,serif\" font-size=\"14.00\">init_state:</text>\n",
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+       "<text text-anchor=\"start\" x=\"10.5\" y=\"-104.8\" font-family=\"Times,serif\" font-size=\"14.00\">num_sets:</text>\n",
+       "<text text-anchor=\"start\" x=\"78.5\" y=\"-104.8\" font-family=\"Times,serif\" font-size=\"14.00\">2</text>\n",
+       "<text text-anchor=\"start\" x=\"10.5\" y=\"-85.8\" font-family=\"Times,serif\" font-size=\"14.00\">acceptance:</text>\n",
+       "<text text-anchor=\"start\" x=\"78.5\" y=\"-85.8\" font-family=\"Times,serif\" font-size=\"14.00\">Fin(0) &amp; Inf(1)</text>\n",
+       "<text text-anchor=\"start\" x=\"10.5\" y=\"-66.8\" font-family=\"Times,serif\" font-size=\"14.00\">ap_vars:</text>\n",
+       "<text text-anchor=\"start\" x=\"78.5\" y=\"-66.8\" font-family=\"Times,serif\" font-size=\"14.00\">b a</text>\n",
        "</g>\n",
        "<!-- meta&#45;&gt;states -->\n",
        "<!-- props -->\n",
-       "<g class=\"node\" id=\"node4\">\n",
+       "<g id=\"node4\" class=\"node\">\n",
        "<title>props</title>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"272.5\" y=\"-180.8\">prop_state_acc:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"416.5\" y=\"-180.8\">maybe</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"272.5\" y=\"-161.8\">prop_inherently_weak:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"416.5\" y=\"-161.8\">maybe</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"272.5\" y=\"-142.8\">prop_terminal:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"416.5\" y=\"-142.8\">no</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"272.5\" y=\"-123.8\">prop_weak:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"416.5\" y=\"-123.8\">maybe</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"272.5\" y=\"-104.8\">prop_very_weak:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"416.5\" y=\"-104.8\">maybe</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"272.5\" y=\"-85.8\">prop_complete:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"416.5\" y=\"-85.8\">maybe</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"272.5\" y=\"-66.8\">prop_universal:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"416.5\" y=\"-66.8\">yes</text>\n",
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-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"416.5\" y=\"-47.8\">yes</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"272.5\" y=\"-28.8\">prop_semi_deterministic:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"416.5\" y=\"-28.8\">yes</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"272.5\" y=\"-9.8\">prop_stutter_invariant:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"416.5\" y=\"-9.8\">maybe</text>\n",
+       "<text text-anchor=\"start\" x=\"272.5\" y=\"-180.8\" font-family=\"Times,serif\" font-size=\"14.00\">prop_state_acc:</text>\n",
+       "<text text-anchor=\"start\" x=\"416.5\" y=\"-180.8\" font-family=\"Times,serif\" font-size=\"14.00\">maybe</text>\n",
+       "<text text-anchor=\"start\" x=\"272.5\" y=\"-161.8\" font-family=\"Times,serif\" font-size=\"14.00\">prop_inherently_weak:</text>\n",
+       "<text text-anchor=\"start\" x=\"416.5\" y=\"-161.8\" font-family=\"Times,serif\" font-size=\"14.00\">maybe</text>\n",
+       "<text text-anchor=\"start\" x=\"272.5\" y=\"-142.8\" font-family=\"Times,serif\" font-size=\"14.00\">prop_terminal:</text>\n",
+       "<text text-anchor=\"start\" x=\"416.5\" y=\"-142.8\" font-family=\"Times,serif\" font-size=\"14.00\">no</text>\n",
+       "<text text-anchor=\"start\" x=\"272.5\" y=\"-123.8\" font-family=\"Times,serif\" font-size=\"14.00\">prop_weak:</text>\n",
+       "<text text-anchor=\"start\" x=\"416.5\" y=\"-123.8\" font-family=\"Times,serif\" font-size=\"14.00\">maybe</text>\n",
+       "<text text-anchor=\"start\" x=\"272.5\" y=\"-104.8\" font-family=\"Times,serif\" font-size=\"14.00\">prop_very_weak:</text>\n",
+       "<text text-anchor=\"start\" x=\"416.5\" y=\"-104.8\" font-family=\"Times,serif\" font-size=\"14.00\">maybe</text>\n",
+       "<text text-anchor=\"start\" x=\"272.5\" y=\"-85.8\" font-family=\"Times,serif\" font-size=\"14.00\">prop_complete:</text>\n",
+       "<text text-anchor=\"start\" x=\"416.5\" y=\"-85.8\" font-family=\"Times,serif\" font-size=\"14.00\">maybe</text>\n",
+       "<text text-anchor=\"start\" x=\"272.5\" y=\"-66.8\" font-family=\"Times,serif\" font-size=\"14.00\">prop_universal:</text>\n",
+       "<text text-anchor=\"start\" x=\"416.5\" y=\"-66.8\" font-family=\"Times,serif\" font-size=\"14.00\">yes</text>\n",
+       "<text text-anchor=\"start\" x=\"272.5\" y=\"-47.8\" font-family=\"Times,serif\" font-size=\"14.00\">prop_unambiguous:</text>\n",
+       "<text text-anchor=\"start\" x=\"416.5\" y=\"-47.8\" font-family=\"Times,serif\" font-size=\"14.00\">yes</text>\n",
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+       "<polygon fill=\"yellow\" stroke=\"transparent\" points=\"516.5,-238 516.5,-259 536.5,-259 536.5,-238 516.5,-238\"/>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"516.5,-238 516.5,-259 536.5,-259 536.5,-238 516.5,-238\"/>\n",
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+       "<polygon fill=\"yellow\" stroke=\"transparent\" points=\"536.5,-238 536.5,-259 573.5,-259 573.5,-238 536.5,-238\"/>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"536.5,-238 536.5,-259 573.5,-259 573.5,-238 536.5,-238\"/>\n",
+       "<text text-anchor=\"start\" x=\"551.5\" y=\"-244.8\" font-family=\"Times,serif\" font-size=\"14.00\">1</text>\n",
        "</g>\n",
        "<!-- meta -->\n",
-       "<g class=\"node\" id=\"node3\">\n",
+       "<g id=\"node3\" class=\"node\">\n",
        "<title>meta</title>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"10.5\" y=\"-123.8\">init_state:</text>\n",
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-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"10.5\" y=\"-104.8\">num_sets:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"78.5\" y=\"-104.8\">2</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"10.5\" y=\"-85.8\">acceptance:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"78.5\" y=\"-85.8\">Fin(0) &amp; Inf(1)</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"10.5\" y=\"-66.8\">ap_vars:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"78.5\" y=\"-66.8\">b a</text>\n",
+       "<text text-anchor=\"start\" x=\"10.5\" y=\"-123.8\" font-family=\"Times,serif\" font-size=\"14.00\">init_state:</text>\n",
+       "<polygon fill=\"yellow\" stroke=\"transparent\" points=\"76.5,-118 76.5,-137 165.5,-137 165.5,-118 76.5,-118\"/>\n",
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+       "<text text-anchor=\"start\" x=\"10.5\" y=\"-104.8\" font-family=\"Times,serif\" font-size=\"14.00\">num_sets:</text>\n",
+       "<text text-anchor=\"start\" x=\"78.5\" y=\"-104.8\" font-family=\"Times,serif\" font-size=\"14.00\">2</text>\n",
+       "<text text-anchor=\"start\" x=\"10.5\" y=\"-85.8\" font-family=\"Times,serif\" font-size=\"14.00\">acceptance:</text>\n",
+       "<text text-anchor=\"start\" x=\"78.5\" y=\"-85.8\" font-family=\"Times,serif\" font-size=\"14.00\">Fin(0) &amp; Inf(1)</text>\n",
+       "<text text-anchor=\"start\" x=\"10.5\" y=\"-66.8\" font-family=\"Times,serif\" font-size=\"14.00\">ap_vars:</text>\n",
+       "<text text-anchor=\"start\" x=\"78.5\" y=\"-66.8\" font-family=\"Times,serif\" font-size=\"14.00\">b a</text>\n",
        "</g>\n",
        "<!-- meta&#45;&gt;states -->\n",
        "<!-- props -->\n",
-       "<g class=\"node\" id=\"node4\">\n",
+       "<g id=\"node4\" class=\"node\">\n",
        "<title>props</title>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"280.5\" y=\"-180.8\">prop_state_acc:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"424.5\" y=\"-180.8\">maybe</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"280.5\" y=\"-161.8\">prop_inherently_weak:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"424.5\" y=\"-161.8\">maybe</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"280.5\" y=\"-142.8\">prop_terminal:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"424.5\" y=\"-142.8\">no</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"280.5\" y=\"-123.8\">prop_weak:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"424.5\" y=\"-123.8\">maybe</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"280.5\" y=\"-104.8\">prop_very_weak:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"424.5\" y=\"-104.8\">maybe</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"280.5\" y=\"-85.8\">prop_complete:</text>\n",
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-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"280.5\" y=\"-66.8\">prop_universal:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"424.5\" y=\"-66.8\">yes</text>\n",
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-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"424.5\" y=\"-47.8\">yes</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"280.5\" y=\"-28.8\">prop_semi_deterministic:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"424.5\" y=\"-28.8\">yes</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"280.5\" y=\"-9.8\">prop_stutter_invariant:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"424.5\" y=\"-9.8\">maybe</text>\n",
+       "<text text-anchor=\"start\" x=\"280.5\" y=\"-180.8\" font-family=\"Times,serif\" font-size=\"14.00\">prop_state_acc:</text>\n",
+       "<text text-anchor=\"start\" x=\"424.5\" y=\"-180.8\" font-family=\"Times,serif\" font-size=\"14.00\">maybe</text>\n",
+       "<text text-anchor=\"start\" x=\"280.5\" y=\"-161.8\" font-family=\"Times,serif\" font-size=\"14.00\">prop_inherently_weak:</text>\n",
+       "<text text-anchor=\"start\" x=\"424.5\" y=\"-161.8\" font-family=\"Times,serif\" font-size=\"14.00\">maybe</text>\n",
+       "<text text-anchor=\"start\" x=\"280.5\" y=\"-142.8\" font-family=\"Times,serif\" font-size=\"14.00\">prop_terminal:</text>\n",
+       "<text text-anchor=\"start\" x=\"424.5\" y=\"-142.8\" font-family=\"Times,serif\" font-size=\"14.00\">no</text>\n",
+       "<text text-anchor=\"start\" x=\"280.5\" y=\"-123.8\" font-family=\"Times,serif\" font-size=\"14.00\">prop_weak:</text>\n",
+       "<text text-anchor=\"start\" x=\"424.5\" y=\"-123.8\" font-family=\"Times,serif\" font-size=\"14.00\">maybe</text>\n",
+       "<text text-anchor=\"start\" x=\"280.5\" y=\"-104.8\" font-family=\"Times,serif\" font-size=\"14.00\">prop_very_weak:</text>\n",
+       "<text text-anchor=\"start\" x=\"424.5\" y=\"-104.8\" font-family=\"Times,serif\" font-size=\"14.00\">maybe</text>\n",
+       "<text text-anchor=\"start\" x=\"280.5\" y=\"-85.8\" font-family=\"Times,serif\" font-size=\"14.00\">prop_complete:</text>\n",
+       "<text text-anchor=\"start\" x=\"424.5\" y=\"-85.8\" font-family=\"Times,serif\" font-size=\"14.00\">maybe</text>\n",
+       "<text text-anchor=\"start\" x=\"280.5\" y=\"-66.8\" font-family=\"Times,serif\" font-size=\"14.00\">prop_universal:</text>\n",
+       "<text text-anchor=\"start\" x=\"424.5\" y=\"-66.8\" font-family=\"Times,serif\" font-size=\"14.00\">yes</text>\n",
+       "<text text-anchor=\"start\" x=\"280.5\" y=\"-47.8\" font-family=\"Times,serif\" font-size=\"14.00\">prop_unambiguous:</text>\n",
+       "<text text-anchor=\"start\" x=\"424.5\" y=\"-47.8\" font-family=\"Times,serif\" font-size=\"14.00\">yes</text>\n",
+       "<text text-anchor=\"start\" x=\"280.5\" y=\"-28.8\" font-family=\"Times,serif\" font-size=\"14.00\">prop_semi_deterministic:</text>\n",
+       "<text text-anchor=\"start\" x=\"424.5\" y=\"-28.8\" font-family=\"Times,serif\" font-size=\"14.00\">yes</text>\n",
+       "<text text-anchor=\"start\" x=\"280.5\" y=\"-9.8\" font-family=\"Times,serif\" font-size=\"14.00\">prop_stutter_invariant:</text>\n",
+       "<text text-anchor=\"start\" x=\"424.5\" y=\"-9.8\" font-family=\"Times,serif\" font-size=\"14.00\">maybe</text>\n",
        "</g>\n",
        "<!-- props&#45;&gt;edges -->\n",
        "</g>\n",
-       "</svg>"
+       "</svg>\n"
       ],
       "text/plain": [
-       "<IPython.core.display.SVG object>"
+       "<spot.jupyter.SVG object>"
       ]
      },
      "metadata": {},
@@ -1931,39 +1966,46 @@
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-       "<g class=\"graph\" id=\"graph0\" transform=\"scale(1 1) rotate(0) translate(4 202)\">\n",
+       "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>\n",
+       "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\"\n",
+       " \"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\">\n",
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+       " -->\n",
+       "<!-- Title: g Pages: 1 -->\n",
+       "<svg width=\"209pt\" height=\"206pt\"\n",
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+       "<g id=\"graph0\" class=\"graph\" transform=\"scale(1.0 1.0) rotate(0) translate(4 202)\">\n",
        "<title>g</title>\n",
-       "<polygon fill=\"#ffffff\" points=\"-4,4 -4,-202 205,-202 205,4 -4,4\" stroke=\"transparent\"/>\n",
+       "<polygon fill=\"white\" stroke=\"transparent\" points=\"-4,4 -4,-202 205,-202 205,4 -4,4\"/>\n",
        "<!-- props -->\n",
-       "<g class=\"node\" id=\"node1\">\n",
+       "<g id=\"node1\" class=\"node\">\n",
        "<title>props</title>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"10.5\" y=\"-180.8\">prop_state_acc:</text>\n",
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-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"10.5\" y=\"-47.8\">prop_unambiguous:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"154.5\" y=\"-47.8\">maybe</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"10.5\" y=\"-28.8\">prop_semi_deterministic:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"154.5\" y=\"-28.8\">maybe</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"10.5\" y=\"-9.8\">prop_stutter_invariant:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"154.5\" y=\"-9.8\">maybe</text>\n",
+       "<text text-anchor=\"start\" x=\"10.5\" y=\"-180.8\" font-family=\"Times,serif\" font-size=\"14.00\">prop_state_acc:</text>\n",
+       "<text text-anchor=\"start\" x=\"154.5\" y=\"-180.8\" font-family=\"Times,serif\" font-size=\"14.00\">maybe</text>\n",
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@@ -2024,211 +2066,218 @@
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        "<!-- dests -->\n",
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        "<title>dests</title>\n",
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+       "<text text-anchor=\"start\" x=\"655.5\" y=\"-307.8\" font-family=\"Times,serif\" font-size=\"14.00\">~0</text>\n",
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+       "<text text-anchor=\"start\" x=\"702.5\" y=\"-307.8\" font-family=\"Times,serif\" font-size=\"14.00\">~3</text>\n",
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+       "<text text-anchor=\"start\" x=\"656\" y=\"-286.8\" font-family=\"Times,serif\" font-size=\"14.00\">#2</text>\n",
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        "<!-- meta -->\n",
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        "<title>meta</title>\n",
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-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"10.5\" y=\"-104.8\">num_sets:</text>\n",
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-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"10.5\" y=\"-85.8\">acceptance:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"78.5\" y=\"-85.8\">Fin(0) &amp; Inf(1)</text>\n",
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-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"78.5\" y=\"-66.8\">b a</text>\n",
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+       "<text text-anchor=\"start\" x=\"78.5\" y=\"-123.8\" font-family=\"Times,serif\" font-size=\"14.00\">2</text>\n",
+       "<text text-anchor=\"start\" x=\"10.5\" y=\"-104.8\" font-family=\"Times,serif\" font-size=\"14.00\">num_sets:</text>\n",
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      "execution_count": 23,
@@ -3624,184 +3701,184 @@
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+       "<polygon fill=\"none\" stroke=\"black\" points=\"415.5,-238 415.5,-259 458.5,-259 458.5,-238 415.5,-238\"/>\n",
+       "<text text-anchor=\"start\" x=\"433.5\" y=\"-244.8\" font-family=\"Times,serif\" font-size=\"14.00\">1</text>\n",
+       "<polygon fill=\"yellow\" stroke=\"transparent\" points=\"458.5,-238 458.5,-259 495.5,-259 495.5,-238 458.5,-238\"/>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"458.5,-238 458.5,-259 495.5,-259 495.5,-238 458.5,-238\"/>\n",
+       "<text text-anchor=\"start\" x=\"473.5\" y=\"-244.8\" font-family=\"Times,serif\" font-size=\"14.00\">1</text>\n",
+       "<polygon fill=\"yellow\" stroke=\"transparent\" points=\"495.5,-238 495.5,-259 515.5,-259 515.5,-238 495.5,-238\"/>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"495.5,-238 495.5,-259 515.5,-259 515.5,-238 495.5,-238\"/>\n",
+       "<text text-anchor=\"start\" x=\"502\" y=\"-244.8\" font-family=\"Times,serif\" font-size=\"14.00\">2</text>\n",
+       "<polygon fill=\"yellow\" stroke=\"transparent\" points=\"515.5,-238 515.5,-259 542.5,-259 542.5,-238 515.5,-238\"/>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"515.5,-238 515.5,-259 542.5,-259 542.5,-238 515.5,-238\"/>\n",
+       "<text text-anchor=\"start\" x=\"525.5\" y=\"-244.8\" font-family=\"Times,serif\" font-size=\"14.00\">0</text>\n",
+       "<polygon fill=\"yellow\" stroke=\"transparent\" points=\"542.5,-238 542.5,-259 569.5,-259 569.5,-238 542.5,-238\"/>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"542.5,-238 542.5,-259 569.5,-259 569.5,-238 542.5,-238\"/>\n",
+       "<text text-anchor=\"start\" x=\"552.5\" y=\"-244.8\" font-family=\"Times,serif\" font-size=\"14.00\">3</text>\n",
        "</g>\n",
        "<!-- dests -->\n",
-       "<g class=\"node\" id=\"node3\">\n",
+       "<g id=\"node3\" class=\"node\">\n",
        "<title>dests</title>\n",
-       "<polygon fill=\"#ffc0cb\" points=\"603.5,-301 603.5,-322 652.5,-322 652.5,-301 603.5,-301\" stroke=\"transparent\"/>\n",
-       "<polyline fill=\"none\" points=\"603.5,-301 652.5,-301 \" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"614\" y=\"-307.8\">dests</text>\n",
-       "<polygon fill=\"#ffc0cb\" points=\"652.5,-301 652.5,-322 673.5,-322 673.5,-301 652.5,-301\" stroke=\"transparent\"/>\n",
-       "<polyline fill=\"none\" points=\"652.5,-301 673.5,-301 \" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"655.5\" y=\"-307.8\">~0</text>\n",
-       "<polyline fill=\"none\" points=\"673.5,-301 686.5,-301 \" stroke=\"#000000\"/>\n",
-       "<polyline fill=\"none\" points=\"686.5,-301 699.5,-301 \" stroke=\"#000000\"/>\n",
-       "<polygon fill=\"#ffc0cb\" points=\"699.5,-301 699.5,-322 720.5,-322 720.5,-301 699.5,-301\" stroke=\"transparent\"/>\n",
-       "<polyline fill=\"none\" points=\"699.5,-301 720.5,-301 \" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"702.5\" y=\"-307.8\">~3</text>\n",
-       "<polyline fill=\"none\" points=\"720.5,-301 733.5,-301 \" stroke=\"#000000\"/>\n",
-       "<polyline fill=\"none\" points=\"733.5,-301 746.5,-301 \" stroke=\"#000000\"/>\n",
-       "<polygon fill=\"#ffc0cb\" points=\"746.5,-301 746.5,-322 767.5,-322 767.5,-301 746.5,-301\" stroke=\"transparent\"/>\n",
-       "<polyline fill=\"none\" points=\"746.5,-301 767.5,-301 \" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"749.5\" y=\"-307.8\">~6</text>\n",
-       "<polyline fill=\"none\" points=\"767.5,-301 780.5,-301 \" stroke=\"#000000\"/>\n",
-       "<polyline fill=\"none\" points=\"780.5,-301 793.5,-301 \" stroke=\"#000000\"/>\n",
-       "<polyline fill=\"none\" points=\"793.5,-301 806.5,-301 \" stroke=\"#000000\"/>\n",
-       "<polygon fill=\"none\" points=\"603.5,-280 603.5,-301 652.5,-301 652.5,-280 603.5,-280\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"606.5\" y=\"-286.8\">#cnt/dst</text>\n",
-       "<polygon fill=\"none\" points=\"652.5,-280 652.5,-301 673.5,-301 673.5,-280 652.5,-280\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"656\" y=\"-286.8\">#2</text>\n",
-       "<polygon fill=\"#ffff00\" points=\"673.5,-280 673.5,-301 686.5,-301 686.5,-280 673.5,-280\" stroke=\"transparent\"/>\n",
-       "<polygon fill=\"none\" points=\"673.5,-280 673.5,-301 686.5,-301 686.5,-280 673.5,-280\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"676.5\" y=\"-286.8\">0</text>\n",
-       "<polygon fill=\"#ffff00\" points=\"686.5,-280 686.5,-301 699.5,-301 699.5,-280 686.5,-280\" stroke=\"transparent\"/>\n",
-       "<polygon fill=\"none\" points=\"686.5,-280 686.5,-301 699.5,-301 699.5,-280 686.5,-280\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"689.5\" y=\"-286.8\">3</text>\n",
-       "<polygon fill=\"none\" points=\"699.5,-280 699.5,-301 720.5,-301 720.5,-280 699.5,-280\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"703\" y=\"-286.8\">#2</text>\n",
-       "<polygon fill=\"#ffff00\" points=\"720.5,-280 720.5,-301 733.5,-301 733.5,-280 720.5,-280\" stroke=\"transparent\"/>\n",
-       "<polygon fill=\"none\" points=\"720.5,-280 720.5,-301 733.5,-301 733.5,-280 720.5,-280\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"723.5\" y=\"-286.8\">0</text>\n",
-       "<polygon fill=\"#ffff00\" points=\"733.5,-280 733.5,-301 746.5,-301 746.5,-280 733.5,-280\" stroke=\"transparent\"/>\n",
-       "<polygon fill=\"none\" points=\"733.5,-280 733.5,-301 746.5,-301 746.5,-280 733.5,-280\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"736.5\" y=\"-286.8\">1</text>\n",
-       "<polygon fill=\"none\" points=\"746.5,-280 746.5,-301 767.5,-301 767.5,-280 746.5,-280\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"750\" y=\"-286.8\">#3</text>\n",
-       "<polygon fill=\"#ffff00\" points=\"767.5,-280 767.5,-301 780.5,-301 780.5,-280 767.5,-280\" stroke=\"transparent\"/>\n",
-       "<polygon fill=\"none\" points=\"767.5,-280 767.5,-301 780.5,-301 780.5,-280 767.5,-280\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"770.5\" y=\"-286.8\">0</text>\n",
-       "<polygon fill=\"#ffff00\" points=\"780.5,-280 780.5,-301 793.5,-301 793.5,-280 780.5,-280\" stroke=\"transparent\"/>\n",
-       "<polygon fill=\"none\" points=\"780.5,-280 780.5,-301 793.5,-301 793.5,-280 780.5,-280\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"783.5\" y=\"-286.8\">1</text>\n",
-       "<polygon fill=\"#ffff00\" points=\"793.5,-280 793.5,-301 806.5,-301 806.5,-280 793.5,-280\" stroke=\"transparent\"/>\n",
-       "<polygon fill=\"none\" points=\"793.5,-280 793.5,-301 806.5,-301 806.5,-280 793.5,-280\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"796.5\" y=\"-286.8\">2</text>\n",
+       "<polygon fill=\"pink\" stroke=\"transparent\" points=\"603.5,-301 603.5,-322 652.5,-322 652.5,-301 603.5,-301\"/>\n",
+       "<polyline fill=\"none\" stroke=\"black\" points=\"603.5,-301 652.5,-301 \"/>\n",
+       "<text text-anchor=\"start\" x=\"614\" y=\"-307.8\" font-family=\"Times,serif\" font-size=\"14.00\">dests</text>\n",
+       "<polygon fill=\"pink\" stroke=\"transparent\" points=\"652.5,-301 652.5,-322 673.5,-322 673.5,-301 652.5,-301\"/>\n",
+       "<polyline fill=\"none\" stroke=\"black\" points=\"652.5,-301 673.5,-301 \"/>\n",
+       "<text text-anchor=\"start\" x=\"655.5\" y=\"-307.8\" font-family=\"Times,serif\" font-size=\"14.00\">~0</text>\n",
+       "<polyline fill=\"none\" stroke=\"black\" points=\"673.5,-301 686.5,-301 \"/>\n",
+       "<polyline fill=\"none\" stroke=\"black\" points=\"686.5,-301 699.5,-301 \"/>\n",
+       "<polygon fill=\"pink\" stroke=\"transparent\" points=\"699.5,-301 699.5,-322 720.5,-322 720.5,-301 699.5,-301\"/>\n",
+       "<polyline fill=\"none\" stroke=\"black\" points=\"699.5,-301 720.5,-301 \"/>\n",
+       "<text text-anchor=\"start\" x=\"702.5\" y=\"-307.8\" font-family=\"Times,serif\" font-size=\"14.00\">~3</text>\n",
+       "<polyline fill=\"none\" stroke=\"black\" points=\"720.5,-301 733.5,-301 \"/>\n",
+       "<polyline fill=\"none\" stroke=\"black\" points=\"733.5,-301 746.5,-301 \"/>\n",
+       "<polygon fill=\"pink\" stroke=\"transparent\" points=\"746.5,-301 746.5,-322 767.5,-322 767.5,-301 746.5,-301\"/>\n",
+       "<polyline fill=\"none\" stroke=\"black\" points=\"746.5,-301 767.5,-301 \"/>\n",
+       "<text text-anchor=\"start\" x=\"749.5\" y=\"-307.8\" font-family=\"Times,serif\" font-size=\"14.00\">~6</text>\n",
+       "<polyline fill=\"none\" stroke=\"black\" points=\"767.5,-301 780.5,-301 \"/>\n",
+       "<polyline fill=\"none\" stroke=\"black\" points=\"780.5,-301 793.5,-301 \"/>\n",
+       "<polyline fill=\"none\" stroke=\"black\" points=\"793.5,-301 806.5,-301 \"/>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"603.5,-280 603.5,-301 652.5,-301 652.5,-280 603.5,-280\"/>\n",
+       "<text text-anchor=\"start\" x=\"606.5\" y=\"-286.8\" font-family=\"Times,serif\" font-size=\"14.00\">#cnt/dst</text>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"652.5,-280 652.5,-301 673.5,-301 673.5,-280 652.5,-280\"/>\n",
+       "<text text-anchor=\"start\" x=\"656\" y=\"-286.8\" font-family=\"Times,serif\" font-size=\"14.00\">#2</text>\n",
+       "<polygon fill=\"yellow\" stroke=\"transparent\" points=\"673.5,-280 673.5,-301 686.5,-301 686.5,-280 673.5,-280\"/>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"673.5,-280 673.5,-301 686.5,-301 686.5,-280 673.5,-280\"/>\n",
+       "<text text-anchor=\"start\" x=\"676.5\" y=\"-286.8\" font-family=\"Times,serif\" font-size=\"14.00\">0</text>\n",
+       "<polygon fill=\"yellow\" stroke=\"transparent\" points=\"686.5,-280 686.5,-301 699.5,-301 699.5,-280 686.5,-280\"/>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"686.5,-280 686.5,-301 699.5,-301 699.5,-280 686.5,-280\"/>\n",
+       "<text text-anchor=\"start\" x=\"689.5\" y=\"-286.8\" font-family=\"Times,serif\" font-size=\"14.00\">3</text>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"699.5,-280 699.5,-301 720.5,-301 720.5,-280 699.5,-280\"/>\n",
+       "<text text-anchor=\"start\" x=\"703\" y=\"-286.8\" font-family=\"Times,serif\" font-size=\"14.00\">#2</text>\n",
+       "<polygon fill=\"yellow\" stroke=\"transparent\" points=\"720.5,-280 720.5,-301 733.5,-301 733.5,-280 720.5,-280\"/>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"720.5,-280 720.5,-301 733.5,-301 733.5,-280 720.5,-280\"/>\n",
+       "<text text-anchor=\"start\" x=\"723.5\" y=\"-286.8\" font-family=\"Times,serif\" font-size=\"14.00\">0</text>\n",
+       "<polygon fill=\"yellow\" stroke=\"transparent\" points=\"733.5,-280 733.5,-301 746.5,-301 746.5,-280 733.5,-280\"/>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"733.5,-280 733.5,-301 746.5,-301 746.5,-280 733.5,-280\"/>\n",
+       "<text text-anchor=\"start\" x=\"736.5\" y=\"-286.8\" font-family=\"Times,serif\" font-size=\"14.00\">1</text>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"746.5,-280 746.5,-301 767.5,-301 767.5,-280 746.5,-280\"/>\n",
+       "<text text-anchor=\"start\" x=\"750\" y=\"-286.8\" font-family=\"Times,serif\" font-size=\"14.00\">#3</text>\n",
+       "<polygon fill=\"yellow\" stroke=\"transparent\" points=\"767.5,-280 767.5,-301 780.5,-301 780.5,-280 767.5,-280\"/>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"767.5,-280 767.5,-301 780.5,-301 780.5,-280 767.5,-280\"/>\n",
+       "<text text-anchor=\"start\" x=\"770.5\" y=\"-286.8\" font-family=\"Times,serif\" font-size=\"14.00\">0</text>\n",
+       "<polygon fill=\"yellow\" stroke=\"transparent\" points=\"780.5,-280 780.5,-301 793.5,-301 793.5,-280 780.5,-280\"/>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"780.5,-280 780.5,-301 793.5,-301 793.5,-280 780.5,-280\"/>\n",
+       "<text text-anchor=\"start\" x=\"783.5\" y=\"-286.8\" font-family=\"Times,serif\" font-size=\"14.00\">1</text>\n",
+       "<polygon fill=\"yellow\" stroke=\"transparent\" points=\"793.5,-280 793.5,-301 806.5,-301 806.5,-280 793.5,-280\"/>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"793.5,-280 793.5,-301 806.5,-301 806.5,-280 793.5,-280\"/>\n",
+       "<text text-anchor=\"start\" x=\"796.5\" y=\"-286.8\" font-family=\"Times,serif\" font-size=\"14.00\">2</text>\n",
        "</g>\n",
        "<!-- meta -->\n",
-       "<g class=\"node\" id=\"node4\">\n",
+       "<g id=\"node4\" class=\"node\">\n",
        "<title>meta</title>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"10.5\" y=\"-123.8\">init_state:</text>\n",
-       "<polygon fill=\"#ffc0cb\" points=\"76.5,-118 76.5,-137 165.5,-137 165.5,-118 76.5,-118\" stroke=\"transparent\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"78.5\" y=\"-123.8\">~6</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"10.5\" y=\"-104.8\">num_sets:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"78.5\" y=\"-104.8\">2</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"10.5\" y=\"-85.8\">acceptance:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"78.5\" y=\"-85.8\">Fin(0) &amp; Inf(1)</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"10.5\" y=\"-66.8\">ap_vars:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"78.5\" y=\"-66.8\">b a</text>\n",
+       "<text text-anchor=\"start\" x=\"10.5\" y=\"-123.8\" font-family=\"Times,serif\" font-size=\"14.00\">init_state:</text>\n",
+       "<polygon fill=\"pink\" stroke=\"transparent\" points=\"76.5,-118 76.5,-137 165.5,-137 165.5,-118 76.5,-118\"/>\n",
+       "<text text-anchor=\"start\" x=\"78.5\" y=\"-123.8\" font-family=\"Times,serif\" font-size=\"14.00\">~6</text>\n",
+       "<text text-anchor=\"start\" x=\"10.5\" y=\"-104.8\" font-family=\"Times,serif\" font-size=\"14.00\">num_sets:</text>\n",
+       "<text text-anchor=\"start\" x=\"78.5\" y=\"-104.8\" font-family=\"Times,serif\" font-size=\"14.00\">2</text>\n",
+       "<text text-anchor=\"start\" x=\"10.5\" y=\"-85.8\" font-family=\"Times,serif\" font-size=\"14.00\">acceptance:</text>\n",
+       "<text text-anchor=\"start\" x=\"78.5\" y=\"-85.8\" font-family=\"Times,serif\" font-size=\"14.00\">Fin(0) &amp; Inf(1)</text>\n",
+       "<text text-anchor=\"start\" x=\"10.5\" y=\"-66.8\" font-family=\"Times,serif\" font-size=\"14.00\">ap_vars:</text>\n",
+       "<text text-anchor=\"start\" x=\"78.5\" y=\"-66.8\" font-family=\"Times,serif\" font-size=\"14.00\">b a</text>\n",
        "</g>\n",
        "<!-- meta&#45;&gt;states -->\n",
        "<!-- props -->\n",
-       "<g class=\"node\" id=\"node5\">\n",
+       "<g id=\"node5\" class=\"node\">\n",
        "<title>props</title>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"281.5\" y=\"-180.8\">prop_state_acc:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"425.5\" y=\"-180.8\">maybe</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"281.5\" y=\"-161.8\">prop_inherently_weak:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"425.5\" y=\"-161.8\">maybe</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"281.5\" y=\"-142.8\">prop_terminal:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"425.5\" y=\"-142.8\">maybe</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"281.5\" y=\"-123.8\">prop_weak:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"425.5\" y=\"-123.8\">maybe</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"281.5\" y=\"-104.8\">prop_very_weak:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"425.5\" y=\"-104.8\">maybe</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"281.5\" y=\"-85.8\">prop_complete:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"425.5\" y=\"-85.8\">maybe</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"281.5\" y=\"-66.8\">prop_universal:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"425.5\" y=\"-66.8\">maybe</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"281.5\" y=\"-47.8\">prop_unambiguous:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"425.5\" y=\"-47.8\">maybe</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"281.5\" y=\"-28.8\">prop_semi_deterministic:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"425.5\" y=\"-28.8\">maybe</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"281.5\" y=\"-9.8\">prop_stutter_invariant:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"425.5\" y=\"-9.8\">maybe</text>\n",
+       "<text text-anchor=\"start\" x=\"281.5\" y=\"-180.8\" font-family=\"Times,serif\" font-size=\"14.00\">prop_state_acc:</text>\n",
+       "<text text-anchor=\"start\" x=\"425.5\" y=\"-180.8\" font-family=\"Times,serif\" font-size=\"14.00\">maybe</text>\n",
+       "<text text-anchor=\"start\" x=\"281.5\" y=\"-161.8\" font-family=\"Times,serif\" font-size=\"14.00\">prop_inherently_weak:</text>\n",
+       "<text text-anchor=\"start\" x=\"425.5\" y=\"-161.8\" font-family=\"Times,serif\" font-size=\"14.00\">maybe</text>\n",
+       "<text text-anchor=\"start\" x=\"281.5\" y=\"-142.8\" font-family=\"Times,serif\" font-size=\"14.00\">prop_terminal:</text>\n",
+       "<text text-anchor=\"start\" x=\"425.5\" y=\"-142.8\" font-family=\"Times,serif\" font-size=\"14.00\">maybe</text>\n",
+       "<text text-anchor=\"start\" x=\"281.5\" y=\"-123.8\" font-family=\"Times,serif\" font-size=\"14.00\">prop_weak:</text>\n",
+       "<text text-anchor=\"start\" x=\"425.5\" y=\"-123.8\" font-family=\"Times,serif\" font-size=\"14.00\">maybe</text>\n",
+       "<text text-anchor=\"start\" x=\"281.5\" y=\"-104.8\" font-family=\"Times,serif\" font-size=\"14.00\">prop_very_weak:</text>\n",
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-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"734.5\" y=\"-193.8\">~3</text>\n",
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-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"781.5\" y=\"-193.8\">~6</text>\n",
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-       "<polyline fill=\"none\" points=\"812.5,-187 825.5,-187 \" stroke=\"#000000\"/>\n",
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-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"841.5\" y=\"-193.8\">~10</text>\n",
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-       "<polyline fill=\"none\" points=\"879.5,-187 892.5,-187 \" stroke=\"#000000\"/>\n",
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-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"735\" y=\"-172.8\">#2</text>\n",
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-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"782\" y=\"-172.8\">#3</text>\n",
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-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"845.5\" y=\"-172.8\">#2</text>\n",
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-       "<title>meta</title>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"10.5\" y=\"-66.8\">init_state:</text>\n",
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-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"10.5\" y=\"-47.8\">num_sets:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"78.5\" y=\"-47.8\">2</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"10.5\" y=\"-28.8\">acceptance:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"78.5\" y=\"-28.8\">Fin(0) &amp; Inf(1)</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"10.5\" y=\"-9.8\">ap_vars:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"78.5\" y=\"-9.8\">b a</text>\n",
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-       "</svg>"
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-       "<IPython.core.display.SVG object>"
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-       "<text text-anchor=\"start\" x=\"285.65\" y=\"-255.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">)</text>\n",
-       "<text text-anchor=\"start\" x=\"208.65\" y=\"-241.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">[Rabin 1]</text>\n",
-       "<!-- I -->\n",
-       "<!-- &#45;7 -->\n",
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+       "<text text-anchor=\"start\" x=\"735\" y=\"-172.8\" font-family=\"Times,serif\" font-size=\"14.00\">#2</text>\n",
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+       "<polygon fill=\"none\" stroke=\"black\" points=\"752.5,-166 752.5,-187 765.5,-187 765.5,-166 752.5,-166\"/>\n",
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+       "<text text-anchor=\"start\" x=\"78.5\" y=\"-47.8\" font-family=\"Times,serif\" font-size=\"14.00\">2</text>\n",
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        "<!-- dests -->\n",
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        "<title>dests</title>\n",
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-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"686.5\" y=\"-193.8\">~0</text>\n",
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-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"733.5\" y=\"-193.8\">~3</text>\n",
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-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"780.5\" y=\"-193.8\">~6</text>\n",
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-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"687\" y=\"-172.8\">#2</text>\n",
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+       "<text text-anchor=\"start\" x=\"687\" y=\"-172.8\" font-family=\"Times,serif\" font-size=\"14.00\">#2</text>\n",
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+       "<text text-anchor=\"start\" x=\"781\" y=\"-172.8\" font-family=\"Times,serif\" font-size=\"14.00\">#3</text>\n",
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+       "<polygon fill=\"none\" stroke=\"black\" points=\"798.5,-166 798.5,-187 811.5,-187 811.5,-166 798.5,-166\"/>\n",
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        "<!-- meta -->\n",
-       "<g class=\"node\" id=\"node4\">\n",
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-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"78.5\" y=\"-47.8\">2</text>\n",
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-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"78.5\" y=\"-9.8\">b a</text>\n",
+       "<text text-anchor=\"start\" x=\"10.5\" y=\"-66.8\" font-family=\"Times,serif\" font-size=\"14.00\">init_state:</text>\n",
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+       "<text text-anchor=\"start\" x=\"78.5\" y=\"-66.8\" font-family=\"Times,serif\" font-size=\"14.00\">~6</text>\n",
+       "<text text-anchor=\"start\" x=\"10.5\" y=\"-47.8\" font-family=\"Times,serif\" font-size=\"14.00\">num_sets:</text>\n",
+       "<text text-anchor=\"start\" x=\"78.5\" y=\"-47.8\" font-family=\"Times,serif\" font-size=\"14.00\">2</text>\n",
+       "<text text-anchor=\"start\" x=\"10.5\" y=\"-28.8\" font-family=\"Times,serif\" font-size=\"14.00\">acceptance:</text>\n",
+       "<text text-anchor=\"start\" x=\"78.5\" y=\"-28.8\" font-family=\"Times,serif\" font-size=\"14.00\">Fin(0) &amp; Inf(1)</text>\n",
+       "<text text-anchor=\"start\" x=\"10.5\" y=\"-9.8\" font-family=\"Times,serif\" font-size=\"14.00\">ap_vars:</text>\n",
+       "<text text-anchor=\"start\" x=\"78.5\" y=\"-9.8\" font-family=\"Times,serif\" font-size=\"14.00\">b a</text>\n",
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+       "</svg>\n"
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        "<!-- edges -->\n",
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+       "<text text-anchor=\"start\" x=\"299\" y=\"-265.8\" font-family=\"Times,serif\" font-size=\"14.00\">2</text>\n",
+       "<polygon fill=\"cyan\" stroke=\"transparent\" points=\"324,-259 324,-280 362,-280 362,-259 324,-259\"/>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"324,-259 324,-280 362,-280 362,-259 324,-259\"/>\n",
+       "<text text-anchor=\"start\" x=\"339.5\" y=\"-265.8\" font-family=\"Times,serif\" font-size=\"14.00\">3</text>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"362,-259 362,-280 405,-280 405,-259 362,-259\"/>\n",
+       "<text text-anchor=\"start\" x=\"380\" y=\"-265.8\" font-family=\"Times,serif\" font-size=\"14.00\">0</text>\n",
+       "<polygon fill=\"cyan\" stroke=\"transparent\" points=\"405,-259 405,-280 425,-280 425,-259 405,-259\"/>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"405,-259 405,-280 425,-280 425,-259 405,-259\"/>\n",
+       "<text text-anchor=\"start\" x=\"411.5\" y=\"-265.8\" font-family=\"Times,serif\" font-size=\"14.00\">5</text>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"425,-259 425,-280 452,-280 452,-259 425,-259\"/>\n",
+       "<text text-anchor=\"start\" x=\"435\" y=\"-265.8\" font-family=\"Times,serif\" font-size=\"14.00\">0</text>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"220,-238 220,-259 281,-259 281,-238 220,-238\"/>\n",
+       "<text text-anchor=\"start\" x=\"242.5\" y=\"-244.8\" font-family=\"Times,serif\" font-size=\"14.00\">src</text>\n",
+       "<polygon fill=\"yellow\" stroke=\"transparent\" points=\"281,-238 281,-259 324,-259 324,-238 281,-238\"/>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"281,-238 281,-259 324,-259 324,-238 281,-238\"/>\n",
+       "<text text-anchor=\"start\" x=\"299\" y=\"-244.8\" font-family=\"Times,serif\" font-size=\"14.00\">0</text>\n",
+       "<polygon fill=\"yellow\" stroke=\"transparent\" points=\"324,-238 324,-259 362,-259 362,-238 324,-238\"/>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"324,-238 324,-259 362,-259 362,-238 324,-238\"/>\n",
+       "<text text-anchor=\"start\" x=\"339.5\" y=\"-244.8\" font-family=\"Times,serif\" font-size=\"14.00\">0</text>\n",
+       "<polygon fill=\"yellow\" stroke=\"transparent\" points=\"362,-238 362,-259 405,-259 405,-238 362,-238\"/>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"362,-238 362,-259 405,-259 405,-238 362,-238\"/>\n",
+       "<text text-anchor=\"start\" x=\"380\" y=\"-244.8\" font-family=\"Times,serif\" font-size=\"14.00\">0</text>\n",
+       "<polygon fill=\"yellow\" stroke=\"transparent\" points=\"405,-238 405,-259 425,-259 425,-238 405,-238\"/>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"405,-238 405,-259 425,-259 425,-238 405,-238\"/>\n",
+       "<text text-anchor=\"start\" x=\"411.5\" y=\"-244.8\" font-family=\"Times,serif\" font-size=\"14.00\">1</text>\n",
+       "<polygon fill=\"yellow\" stroke=\"transparent\" points=\"425,-238 425,-259 452,-259 452,-238 425,-238\"/>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"425,-238 425,-259 452,-259 452,-238 425,-238\"/>\n",
+       "<text text-anchor=\"start\" x=\"435\" y=\"-244.8\" font-family=\"Times,serif\" font-size=\"14.00\">1</text>\n",
        "</g>\n",
        "<!-- meta -->\n",
-       "<g class=\"node\" id=\"node3\">\n",
+       "<g id=\"node3\" class=\"node\">\n",
        "<title>meta</title>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"10\" y=\"-123.8\">init_state:</text>\n",
-       "<polygon fill=\"#ffff00\" points=\"76,-118 76,-137 112,-137 112,-118 76,-118\" stroke=\"transparent\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"78\" y=\"-123.8\">0</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"10\" y=\"-104.8\">num_sets:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"78\" y=\"-104.8\">1</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"10\" y=\"-85.8\">acceptance:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"78\" y=\"-85.8\">Inf(0)</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"10\" y=\"-66.8\">ap_vars:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"78\" y=\"-66.8\">b a</text>\n",
+       "<text text-anchor=\"start\" x=\"10\" y=\"-123.8\" font-family=\"Times,serif\" font-size=\"14.00\">init_state:</text>\n",
+       "<polygon fill=\"yellow\" stroke=\"transparent\" points=\"76,-118 76,-137 112,-137 112,-118 76,-118\"/>\n",
+       "<text text-anchor=\"start\" x=\"78\" y=\"-123.8\" font-family=\"Times,serif\" font-size=\"14.00\">0</text>\n",
+       "<text text-anchor=\"start\" x=\"10\" y=\"-104.8\" font-family=\"Times,serif\" font-size=\"14.00\">num_sets:</text>\n",
+       "<text text-anchor=\"start\" x=\"78\" y=\"-104.8\" font-family=\"Times,serif\" font-size=\"14.00\">1</text>\n",
+       "<text text-anchor=\"start\" x=\"10\" y=\"-85.8\" font-family=\"Times,serif\" font-size=\"14.00\">acceptance:</text>\n",
+       "<text text-anchor=\"start\" x=\"78\" y=\"-85.8\" font-family=\"Times,serif\" font-size=\"14.00\">Inf(0)</text>\n",
+       "<text text-anchor=\"start\" x=\"10\" y=\"-66.8\" font-family=\"Times,serif\" font-size=\"14.00\">ap_vars:</text>\n",
+       "<text text-anchor=\"start\" x=\"78\" y=\"-66.8\" font-family=\"Times,serif\" font-size=\"14.00\">b a</text>\n",
        "</g>\n",
        "<!-- meta&#45;&gt;states -->\n",
        "<!-- props -->\n",
-       "<g class=\"node\" id=\"node4\">\n",
+       "<g id=\"node4\" class=\"node\">\n",
        "<title>props</title>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"155\" y=\"-180.8\">prop_state_acc:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"299\" y=\"-180.8\">maybe</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"155\" y=\"-161.8\">prop_inherently_weak:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"299\" y=\"-161.8\">maybe</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"155\" y=\"-142.8\">prop_terminal:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"299\" y=\"-142.8\">maybe</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"155\" y=\"-123.8\">prop_weak:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"299\" y=\"-123.8\">maybe</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"155\" y=\"-104.8\">prop_very_weak:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"299\" y=\"-104.8\">maybe</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"155\" y=\"-85.8\">prop_complete:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"299\" y=\"-85.8\">maybe</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"155\" y=\"-66.8\">prop_universal:</text>\n",
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-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"155\" y=\"-47.8\">prop_unambiguous:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"299\" y=\"-47.8\">yes</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"155\" y=\"-28.8\">prop_semi_deterministic:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"299\" y=\"-28.8\">yes</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"155\" y=\"-9.8\">prop_stutter_invariant:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"299\" y=\"-9.8\">yes</text>\n",
+       "<text text-anchor=\"start\" x=\"155\" y=\"-180.8\" font-family=\"Times,serif\" font-size=\"14.00\">prop_state_acc:</text>\n",
+       "<text text-anchor=\"start\" x=\"299\" y=\"-180.8\" font-family=\"Times,serif\" font-size=\"14.00\">maybe</text>\n",
+       "<text text-anchor=\"start\" x=\"155\" y=\"-161.8\" font-family=\"Times,serif\" font-size=\"14.00\">prop_inherently_weak:</text>\n",
+       "<text text-anchor=\"start\" x=\"299\" y=\"-161.8\" font-family=\"Times,serif\" font-size=\"14.00\">maybe</text>\n",
+       "<text text-anchor=\"start\" x=\"155\" y=\"-142.8\" font-family=\"Times,serif\" font-size=\"14.00\">prop_terminal:</text>\n",
+       "<text text-anchor=\"start\" x=\"299\" y=\"-142.8\" font-family=\"Times,serif\" font-size=\"14.00\">maybe</text>\n",
+       "<text text-anchor=\"start\" x=\"155\" y=\"-123.8\" font-family=\"Times,serif\" font-size=\"14.00\">prop_weak:</text>\n",
+       "<text text-anchor=\"start\" x=\"299\" y=\"-123.8\" font-family=\"Times,serif\" font-size=\"14.00\">maybe</text>\n",
+       "<text text-anchor=\"start\" x=\"155\" y=\"-104.8\" font-family=\"Times,serif\" font-size=\"14.00\">prop_very_weak:</text>\n",
+       "<text text-anchor=\"start\" x=\"299\" y=\"-104.8\" font-family=\"Times,serif\" font-size=\"14.00\">maybe</text>\n",
+       "<text text-anchor=\"start\" x=\"155\" y=\"-85.8\" font-family=\"Times,serif\" font-size=\"14.00\">prop_complete:</text>\n",
+       "<text text-anchor=\"start\" x=\"299\" y=\"-85.8\" font-family=\"Times,serif\" font-size=\"14.00\">maybe</text>\n",
+       "<text text-anchor=\"start\" x=\"155\" y=\"-66.8\" font-family=\"Times,serif\" font-size=\"14.00\">prop_universal:</text>\n",
+       "<text text-anchor=\"start\" x=\"299\" y=\"-66.8\" font-family=\"Times,serif\" font-size=\"14.00\">yes</text>\n",
+       "<text text-anchor=\"start\" x=\"155\" y=\"-47.8\" font-family=\"Times,serif\" font-size=\"14.00\">prop_unambiguous:</text>\n",
+       "<text text-anchor=\"start\" x=\"299\" y=\"-47.8\" font-family=\"Times,serif\" font-size=\"14.00\">yes</text>\n",
+       "<text text-anchor=\"start\" x=\"155\" y=\"-28.8\" font-family=\"Times,serif\" font-size=\"14.00\">prop_semi_deterministic:</text>\n",
+       "<text text-anchor=\"start\" x=\"299\" y=\"-28.8\" font-family=\"Times,serif\" font-size=\"14.00\">yes</text>\n",
+       "<text text-anchor=\"start\" x=\"155\" y=\"-9.8\" font-family=\"Times,serif\" font-size=\"14.00\">prop_stutter_invariant:</text>\n",
+       "<text text-anchor=\"start\" x=\"299\" y=\"-9.8\" font-family=\"Times,serif\" font-size=\"14.00\">yes</text>\n",
        "</g>\n",
        "<!-- props&#45;&gt;edges -->\n",
        "<!-- namedprops -->\n",
-       "<g class=\"node\" id=\"node5\">\n",
+       "<g id=\"node5\" class=\"node\">\n",
        "<title>namedprops</title>\n",
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-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"middle\" x=\"421\" y=\"-95.3\">automaton-name</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"middle\" x=\"421\" y=\"-80.3\">product-states</text>\n",
+       "<text text-anchor=\"middle\" x=\"421\" y=\"-110.3\" font-family=\"Times,serif\" font-size=\"14.00\">named properties:</text>\n",
+       "<text text-anchor=\"middle\" x=\"421\" y=\"-95.3\" font-family=\"Times,serif\" font-size=\"14.00\">automaton&#45;name</text>\n",
+       "<text text-anchor=\"middle\" x=\"421\" y=\"-80.3\" font-family=\"Times,serif\" font-size=\"14.00\">product&#45;states</text>\n",
        "</g>\n",
        "<!-- namedprops&#45;&gt;edges -->\n",
        "</g>\n",
-       "</svg>"
+       "</svg>\n"
       ],
       "text/plain": [
-       "<IPython.core.display.SVG object>"
+       "<spot.jupyter.SVG object>"
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@@ -5523,77 +5628,77 @@
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        "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\"\n",
        " \"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\">\n",
-       "<!-- Generated by graphviz version 2.40.1 (20161225.0304)\n",
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        "<!-- Pages: 1 -->\n",
        "<svg width=\"191pt\" height=\"165pt\"\n",
-       " viewBox=\"0.00 0.00 191.00 164.97\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\">\n",
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-       "<text text-anchor=\"start\" x=\"92.5\" y=\"-142.7653\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#1f78b4\">⓿</text>\n",
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-       "<text text-anchor=\"start\" x=\"68.5\" y=\"-128.7653\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">[Büchi]</text>\n",
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+       "<text text-anchor=\"start\" x=\"68.5\" y=\"-128.84\" font-family=\"Lato\" font-size=\"14.00\">[Büchi]</text>\n",
        "<!-- I -->\n",
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        "<title>0</title>\n",
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-       "<text text-anchor=\"middle\" x=\"56\" y=\"-18.2653\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">0</text>\n",
+       "<ellipse fill=\"#ffffaa\" stroke=\"black\" cx=\"56\" cy=\"-22.04\" rx=\"18\" ry=\"18\"/>\n",
+       "<text text-anchor=\"middle\" x=\"56\" y=\"-18.34\" font-family=\"Lato\" font-size=\"14.00\">0</text>\n",
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        "<!-- I&#45;&gt;0 -->\n",
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        "<title>I&#45;&gt;0</title>\n",
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-       "<text text-anchor=\"start\" x=\"37.5\" y=\"-61.7653\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">a &amp; !b</text>\n",
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+       "<polyline fill=\"none\" stroke=\"black\" points=\"135,-343 196,-343 \"/>\n",
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+       "<polygon fill=\"cyan\" stroke=\"transparent\" points=\"196,-343 196,-364 239,-364 239,-343 196,-343\"/>\n",
+       "<polyline fill=\"none\" stroke=\"black\" points=\"196,-343 239,-343 \"/>\n",
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+       "<polygon fill=\"cyan\" stroke=\"transparent\" points=\"239,-343 239,-364 277,-364 277,-343 239,-343\"/>\n",
+       "<polyline fill=\"none\" stroke=\"black\" points=\"239,-343 277,-343 \"/>\n",
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+       "<polygon fill=\"cyan\" stroke=\"transparent\" points=\"277,-343 277,-364 320,-364 320,-343 277,-343\"/>\n",
+       "<polyline fill=\"none\" stroke=\"black\" points=\"277,-343 320,-343 \"/>\n",
+       "<text text-anchor=\"start\" x=\"295\" y=\"-349.8\" font-family=\"Times,serif\" font-size=\"14.00\">3</text>\n",
+       "<polygon fill=\"cyan\" stroke=\"transparent\" points=\"320,-343 320,-364 340,-364 340,-343 320,-343\"/>\n",
+       "<polyline fill=\"none\" stroke=\"black\" points=\"320,-343 340,-343 \"/>\n",
+       "<text text-anchor=\"start\" x=\"326.5\" y=\"-349.8\" font-family=\"Times,serif\" font-size=\"14.00\">4</text>\n",
+       "<polygon fill=\"cyan\" stroke=\"transparent\" points=\"340,-343 340,-364 367,-364 367,-343 340,-343\"/>\n",
+       "<polyline fill=\"none\" stroke=\"black\" points=\"340,-343 367,-343 \"/>\n",
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+       "<polygon fill=\"none\" stroke=\"black\" points=\"135,-322 135,-343 196,-343 196,-322 135,-322\"/>\n",
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+       "<polygon fill=\"none\" stroke=\"black\" points=\"196,-322 196,-343 239,-343 239,-322 196,-322\"/>\n",
+       "<text text-anchor=\"start\" x=\"199\" y=\"-328.8\" font-family=\"Times,serif\" font-size=\"14.00\">!a &amp; b</text>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"239,-322 239,-343 277,-343 277,-322 239,-322\"/>\n",
+       "<text text-anchor=\"start\" x=\"242\" y=\"-328.8\" font-family=\"Times,serif\" font-size=\"14.00\">a &amp; b</text>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"277,-322 277,-343 320,-343 320,-322 277,-322\"/>\n",
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+       "<polygon fill=\"none\" stroke=\"black\" points=\"320,-322 320,-343 340,-343 340,-322 320,-322\"/>\n",
+       "<text text-anchor=\"start\" x=\"324.5\" y=\"-328.8\" font-family=\"Times,serif\" font-size=\"14.00\">!a</text>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"340,-322 340,-343 367,-343 367,-322 340,-322\"/>\n",
+       "<text text-anchor=\"start\" x=\"350\" y=\"-328.8\" font-family=\"Times,serif\" font-size=\"14.00\">a</text>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"135,-301 135,-322 196,-322 196,-301 135,-301\"/>\n",
+       "<text text-anchor=\"start\" x=\"156\" y=\"-307.8\" font-family=\"Times,serif\" font-size=\"14.00\">acc</text>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"196,-301 196,-322 239,-322 239,-301 196,-301\"/>\n",
+       "<text text-anchor=\"start\" x=\"210.5\" y=\"-307.8\" font-family=\"Times,serif\" font-size=\"14.00\">{}</text>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"239,-301 239,-322 277,-322 277,-301 239,-301\"/>\n",
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+       "<polygon fill=\"none\" stroke=\"black\" points=\"277,-301 277,-322 320,-322 320,-301 277,-301\"/>\n",
+       "<text text-anchor=\"start\" x=\"291.5\" y=\"-307.8\" font-family=\"Times,serif\" font-size=\"14.00\">{}</text>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"320,-301 320,-322 340,-322 340,-301 320,-301\"/>\n",
+       "<text text-anchor=\"start\" x=\"323\" y=\"-307.8\" font-family=\"Times,serif\" font-size=\"14.00\">{}</text>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"340,-301 340,-322 367,-322 367,-301 340,-301\"/>\n",
+       "<text text-anchor=\"start\" x=\"343\" y=\"-307.8\" font-family=\"Times,serif\" font-size=\"14.00\">{0}</text>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"135,-280 135,-301 196,-301 196,-280 135,-280\"/>\n",
+       "<text text-anchor=\"start\" x=\"157.5\" y=\"-286.8\" font-family=\"Times,serif\" font-size=\"14.00\">dst</text>\n",
+       "<polygon fill=\"yellow\" stroke=\"transparent\" points=\"196,-280 196,-301 239,-301 239,-280 196,-280\"/>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"196,-280 196,-301 239,-301 239,-280 196,-280\"/>\n",
+       "<text text-anchor=\"start\" x=\"214\" y=\"-286.8\" font-family=\"Times,serif\" font-size=\"14.00\">1</text>\n",
+       "<polygon fill=\"yellow\" stroke=\"transparent\" points=\"239,-280 239,-301 277,-301 277,-280 239,-280\"/>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"239,-280 239,-301 277,-301 277,-280 239,-280\"/>\n",
+       "<text text-anchor=\"start\" x=\"254.5\" y=\"-286.8\" font-family=\"Times,serif\" font-size=\"14.00\">1</text>\n",
+       "<polygon fill=\"yellow\" stroke=\"transparent\" points=\"277,-280 277,-301 320,-301 320,-280 277,-280\"/>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"277,-280 277,-301 320,-301 320,-280 277,-280\"/>\n",
+       "<text text-anchor=\"start\" x=\"295\" y=\"-286.8\" font-family=\"Times,serif\" font-size=\"14.00\">0</text>\n",
+       "<polygon fill=\"yellow\" stroke=\"transparent\" points=\"320,-280 320,-301 340,-301 340,-280 320,-280\"/>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"320,-280 320,-301 340,-301 340,-280 320,-280\"/>\n",
+       "<text text-anchor=\"start\" x=\"326.5\" y=\"-286.8\" font-family=\"Times,serif\" font-size=\"14.00\">1</text>\n",
+       "<polygon fill=\"yellow\" stroke=\"transparent\" points=\"340,-280 340,-301 367,-301 367,-280 340,-280\"/>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"340,-280 340,-301 367,-301 367,-280 340,-280\"/>\n",
+       "<text text-anchor=\"start\" x=\"350\" y=\"-286.8\" font-family=\"Times,serif\" font-size=\"14.00\">1</text>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"135,-259 135,-280 196,-280 196,-259 135,-259\"/>\n",
+       "<text text-anchor=\"start\" x=\"138\" y=\"-265.8\" font-family=\"Times,serif\" font-size=\"14.00\">next_succ</text>\n",
+       "<polygon fill=\"cyan\" stroke=\"transparent\" points=\"196,-259 196,-280 239,-280 239,-259 196,-259\"/>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"196,-259 196,-280 239,-280 239,-259 196,-259\"/>\n",
+       "<text text-anchor=\"start\" x=\"214\" y=\"-265.8\" font-family=\"Times,serif\" font-size=\"14.00\">2</text>\n",
+       "<polygon fill=\"cyan\" stroke=\"transparent\" points=\"239,-259 239,-280 277,-280 277,-259 239,-259\"/>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"239,-259 239,-280 277,-280 277,-259 239,-259\"/>\n",
+       "<text text-anchor=\"start\" x=\"254.5\" y=\"-265.8\" font-family=\"Times,serif\" font-size=\"14.00\">3</text>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"277,-259 277,-280 320,-280 320,-259 277,-259\"/>\n",
+       "<text text-anchor=\"start\" x=\"295\" y=\"-265.8\" font-family=\"Times,serif\" font-size=\"14.00\">0</text>\n",
+       "<polygon fill=\"cyan\" stroke=\"transparent\" points=\"320,-259 320,-280 340,-280 340,-259 320,-259\"/>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"320,-259 320,-280 340,-280 340,-259 320,-259\"/>\n",
+       "<text text-anchor=\"start\" x=\"326.5\" y=\"-265.8\" font-family=\"Times,serif\" font-size=\"14.00\">5</text>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"340,-259 340,-280 367,-280 367,-259 340,-259\"/>\n",
+       "<text text-anchor=\"start\" x=\"350\" y=\"-265.8\" font-family=\"Times,serif\" font-size=\"14.00\">0</text>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"135,-238 135,-259 196,-259 196,-238 135,-238\"/>\n",
+       "<text text-anchor=\"start\" x=\"157.5\" y=\"-244.8\" font-family=\"Times,serif\" font-size=\"14.00\">src</text>\n",
+       "<polygon fill=\"yellow\" stroke=\"transparent\" points=\"196,-238 196,-259 239,-259 239,-238 196,-238\"/>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"196,-238 196,-259 239,-259 239,-238 196,-238\"/>\n",
+       "<text text-anchor=\"start\" x=\"214\" y=\"-244.8\" font-family=\"Times,serif\" font-size=\"14.00\">0</text>\n",
+       "<polygon fill=\"yellow\" stroke=\"transparent\" points=\"239,-238 239,-259 277,-259 277,-238 239,-238\"/>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"239,-238 239,-259 277,-259 277,-238 239,-238\"/>\n",
+       "<text text-anchor=\"start\" x=\"254.5\" y=\"-244.8\" font-family=\"Times,serif\" font-size=\"14.00\">0</text>\n",
+       "<polygon fill=\"yellow\" stroke=\"transparent\" points=\"277,-238 277,-259 320,-259 320,-238 277,-238\"/>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"277,-238 277,-259 320,-259 320,-238 277,-238\"/>\n",
+       "<text text-anchor=\"start\" x=\"295\" y=\"-244.8\" font-family=\"Times,serif\" font-size=\"14.00\">0</text>\n",
+       "<polygon fill=\"yellow\" stroke=\"transparent\" points=\"320,-238 320,-259 340,-259 340,-238 320,-238\"/>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"320,-238 320,-259 340,-259 340,-238 320,-238\"/>\n",
+       "<text text-anchor=\"start\" x=\"326.5\" y=\"-244.8\" font-family=\"Times,serif\" font-size=\"14.00\">1</text>\n",
+       "<polygon fill=\"yellow\" stroke=\"transparent\" points=\"340,-238 340,-259 367,-259 367,-238 340,-238\"/>\n",
+       "<polygon fill=\"none\" stroke=\"black\" points=\"340,-238 340,-259 367,-259 367,-238 340,-238\"/>\n",
+       "<text text-anchor=\"start\" x=\"350\" y=\"-244.8\" font-family=\"Times,serif\" font-size=\"14.00\">1</text>\n",
        "</g>\n",
        "<!-- meta -->\n",
-       "<g class=\"node\" id=\"node3\">\n",
+       "<g id=\"node3\" class=\"node\">\n",
        "<title>meta</title>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"10\" y=\"-123.8\">init_state:</text>\n",
-       "<polygon fill=\"#ffff00\" points=\"76,-118 76,-137 112,-137 112,-118 76,-118\" stroke=\"transparent\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"78\" y=\"-123.8\">0</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"10\" y=\"-104.8\">num_sets:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"78\" y=\"-104.8\">1</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"10\" y=\"-85.8\">acceptance:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"78\" y=\"-85.8\">Inf(0)</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"10\" y=\"-66.8\">ap_vars:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"78\" y=\"-66.8\">b a</text>\n",
+       "<text text-anchor=\"start\" x=\"10\" y=\"-123.8\" font-family=\"Times,serif\" font-size=\"14.00\">init_state:</text>\n",
+       "<polygon fill=\"yellow\" stroke=\"transparent\" points=\"76,-118 76,-137 112,-137 112,-118 76,-118\"/>\n",
+       "<text text-anchor=\"start\" x=\"78\" y=\"-123.8\" font-family=\"Times,serif\" font-size=\"14.00\">0</text>\n",
+       "<text text-anchor=\"start\" x=\"10\" y=\"-104.8\" font-family=\"Times,serif\" font-size=\"14.00\">num_sets:</text>\n",
+       "<text text-anchor=\"start\" x=\"78\" y=\"-104.8\" font-family=\"Times,serif\" font-size=\"14.00\">1</text>\n",
+       "<text text-anchor=\"start\" x=\"10\" y=\"-85.8\" font-family=\"Times,serif\" font-size=\"14.00\">acceptance:</text>\n",
+       "<text text-anchor=\"start\" x=\"78\" y=\"-85.8\" font-family=\"Times,serif\" font-size=\"14.00\">Inf(0)</text>\n",
+       "<text text-anchor=\"start\" x=\"10\" y=\"-66.8\" font-family=\"Times,serif\" font-size=\"14.00\">ap_vars:</text>\n",
+       "<text text-anchor=\"start\" x=\"78\" y=\"-66.8\" font-family=\"Times,serif\" font-size=\"14.00\">b a</text>\n",
        "</g>\n",
        "<!-- meta&#45;&gt;states -->\n",
        "<!-- props -->\n",
-       "<g class=\"node\" id=\"node4\">\n",
+       "<g id=\"node4\" class=\"node\">\n",
        "<title>props</title>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"161\" y=\"-180.8\">prop_state_acc:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"305\" y=\"-180.8\">maybe</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"161\" y=\"-161.8\">prop_inherently_weak:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"305\" y=\"-161.8\">maybe</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"161\" y=\"-142.8\">prop_terminal:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"305\" y=\"-142.8\">maybe</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"161\" y=\"-123.8\">prop_weak:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"305\" y=\"-123.8\">maybe</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"161\" y=\"-104.8\">prop_very_weak:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"305\" y=\"-104.8\">maybe</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"161\" y=\"-85.8\">prop_complete:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"305\" y=\"-85.8\">maybe</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"161\" y=\"-66.8\">prop_universal:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"305\" y=\"-66.8\">yes</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"161\" y=\"-47.8\">prop_unambiguous:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"305\" y=\"-47.8\">yes</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"161\" y=\"-28.8\">prop_semi_deterministic:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"305\" y=\"-28.8\">yes</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"161\" y=\"-9.8\">prop_stutter_invariant:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"305\" y=\"-9.8\">yes</text>\n",
+       "<text text-anchor=\"start\" x=\"161\" y=\"-180.8\" font-family=\"Times,serif\" font-size=\"14.00\">prop_state_acc:</text>\n",
+       "<text text-anchor=\"start\" x=\"305\" y=\"-180.8\" font-family=\"Times,serif\" font-size=\"14.00\">maybe</text>\n",
+       "<text text-anchor=\"start\" x=\"161\" y=\"-161.8\" font-family=\"Times,serif\" font-size=\"14.00\">prop_inherently_weak:</text>\n",
+       "<text text-anchor=\"start\" x=\"305\" y=\"-161.8\" font-family=\"Times,serif\" font-size=\"14.00\">maybe</text>\n",
+       "<text text-anchor=\"start\" x=\"161\" y=\"-142.8\" font-family=\"Times,serif\" font-size=\"14.00\">prop_terminal:</text>\n",
+       "<text text-anchor=\"start\" x=\"305\" y=\"-142.8\" font-family=\"Times,serif\" font-size=\"14.00\">maybe</text>\n",
+       "<text text-anchor=\"start\" x=\"161\" y=\"-123.8\" font-family=\"Times,serif\" font-size=\"14.00\">prop_weak:</text>\n",
+       "<text text-anchor=\"start\" x=\"305\" y=\"-123.8\" font-family=\"Times,serif\" font-size=\"14.00\">maybe</text>\n",
+       "<text text-anchor=\"start\" x=\"161\" y=\"-104.8\" font-family=\"Times,serif\" font-size=\"14.00\">prop_very_weak:</text>\n",
+       "<text text-anchor=\"start\" x=\"305\" y=\"-104.8\" font-family=\"Times,serif\" font-size=\"14.00\">maybe</text>\n",
+       "<text text-anchor=\"start\" x=\"161\" y=\"-85.8\" font-family=\"Times,serif\" font-size=\"14.00\">prop_complete:</text>\n",
+       "<text text-anchor=\"start\" x=\"305\" y=\"-85.8\" font-family=\"Times,serif\" font-size=\"14.00\">maybe</text>\n",
+       "<text text-anchor=\"start\" x=\"161\" y=\"-66.8\" font-family=\"Times,serif\" font-size=\"14.00\">prop_universal:</text>\n",
+       "<text text-anchor=\"start\" x=\"305\" y=\"-66.8\" font-family=\"Times,serif\" font-size=\"14.00\">yes</text>\n",
+       "<text text-anchor=\"start\" x=\"161\" y=\"-47.8\" font-family=\"Times,serif\" font-size=\"14.00\">prop_unambiguous:</text>\n",
+       "<text text-anchor=\"start\" x=\"305\" y=\"-47.8\" font-family=\"Times,serif\" font-size=\"14.00\">yes</text>\n",
+       "<text text-anchor=\"start\" x=\"161\" y=\"-28.8\" font-family=\"Times,serif\" font-size=\"14.00\">prop_semi_deterministic:</text>\n",
+       "<text text-anchor=\"start\" x=\"305\" y=\"-28.8\" font-family=\"Times,serif\" font-size=\"14.00\">yes</text>\n",
+       "<text text-anchor=\"start\" x=\"161\" y=\"-9.8\" font-family=\"Times,serif\" font-size=\"14.00\">prop_stutter_invariant:</text>\n",
+       "<text text-anchor=\"start\" x=\"305\" y=\"-9.8\" font-family=\"Times,serif\" font-size=\"14.00\">yes</text>\n",
        "</g>\n",
        "<!-- props&#45;&gt;edges -->\n",
        "</g>\n",
-       "</svg>"
+       "</svg>\n"
       ],
       "text/plain": [
-       "<IPython.core.display.SVG object>"
+       "<spot.jupyter.SVG object>"
       ]
      },
      "metadata": {},
@@ -5802,7 +5914,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.7.3"
+   "version": "3.7.5"
   }
  },
  "nbformat": 4,
diff --git a/tests/python/word.ipynb b/tests/python/word.ipynb
index 668417ed2..af7bc95ea 100644
--- a/tests/python/word.ipynb
+++ b/tests/python/word.ipynb
@@ -28,145 +28,145 @@
        "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>\n",
        "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\"\n",
        " \"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\">\n",
-       "<!-- Generated by graphviz version 2.40.1 (20161225.0304)\n",
+       "<!-- Generated by graphviz version 2.43.0 (0)\n",
        " -->\n",
        "<!-- Pages: 1 -->\n",
        "<svg width=\"465pt\" height=\"232pt\"\n",
        " viewBox=\"0.00 0.00 464.50 232.00\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\">\n",
-       "<g id=\"graph0\" class=\"graph\" transform=\"scale(1 1) rotate(0) translate(4 228)\">\n",
-       "<polygon fill=\"#ffffff\" stroke=\"transparent\" points=\"-4,4 -4,-228 460.5,-228 460.5,4 -4,4\"/>\n",
-       "<text text-anchor=\"start\" x=\"207.25\" y=\"-209.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">Inf(</text>\n",
+       "<g id=\"graph0\" class=\"graph\" transform=\"scale(1.0 1.0) rotate(0) translate(4 228)\">\n",
+       "<polygon fill=\"white\" stroke=\"transparent\" points=\"-4,4 -4,-228 460.5,-228 460.5,4 -4,4\"/>\n",
+       "<text text-anchor=\"start\" x=\"207.25\" y=\"-209.8\" font-family=\"Lato\" font-size=\"14.00\">Inf(</text>\n",
        "<text text-anchor=\"start\" x=\"229.25\" y=\"-209.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#1f78b4\">⓿</text>\n",
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       "text/plain": [
-       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f4e4c5e8de0> >"
+       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f956c0198d0> >"
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      "execution_count": 2,
@@ -262,7 +262,7 @@
        "$\\lnot a; a; \\mathsf{cycle}\\{a \\land b\\}$"
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-       "<spot.twa_word; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_word > *' at 0x7f4e4c5e8b70> >"
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      "execution_count": 5,
@@ -291,15 +291,18 @@
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-       "<line stroke=\"white\" stroke-width=\"4\" x1=\"0\" x2=\"200\" y1=\"0\" y2=\"0\"/><text font-size=\"20\" text-anchor=\"start\" x=\"3\" y=\"30\">a</text><line stroke=\"white\" stroke-width=\"1\" x1=\"50\" x2=\"50\" y1=\"0\" y2=\"50\"/><line stroke=\"#ff0000\" stroke-width=\"2\" x1=\"0\" x2=\"50\" y1=\"45\" y2=\"45\"/><line stroke=\"white\" stroke-width=\"1\" x1=\"100\" x2=\"100\" y1=\"0\" y2=\"50\"/><line stroke=\"#ff0000\" stroke-width=\"2\" x1=\"50\" x2=\"50\" y1=\"5\" y2=\"45\"/><line stroke=\"#ff0000\" stroke-width=\"2\" x1=\"50\" x2=\"100\" y1=\"5\" y2=\"5\"/><line stroke=\"white\" stroke-width=\"1\" x1=\"150\" x2=\"150\" y1=\"0\" y2=\"50\"/><line stroke=\"#ff0000\" stroke-width=\"2\" x1=\"100\" x2=\"150\" y1=\"5\" y2=\"5\"/><line stroke=\"white\" stroke-width=\"1\" x1=\"200\" x2=\"200\" y1=\"0\" y2=\"50\"/><line stroke=\"#ff0000\" stroke-width=\"2\" x1=\"150\" x2=\"200\" y1=\"5\" y2=\"5\"/><line stroke=\"white\" stroke-width=\"4\" x1=\"0\" x2=\"200\" y1=\"50\" y2=\"50\"/><text font-size=\"20\" text-anchor=\"start\" x=\"3\" y=\"80\">b</text><line stroke=\"white\" stroke-width=\"1\" x1=\"50\" x2=\"50\" y1=\"50\" y2=\"100\"/><line stroke=\"white\" stroke-width=\"1\" x1=\"100\" x2=\"100\" y1=\"50\" y2=\"100\"/><line stroke=\"white\" stroke-width=\"1\" x1=\"150\" x2=\"150\" y1=\"50\" y2=\"100\"/><line stroke=\"#ff0000\" stroke-width=\"2\" x1=\"100\" x2=\"150\" y1=\"55\" y2=\"55\"/><line stroke=\"white\" stroke-width=\"1\" x1=\"200\" x2=\"200\" y1=\"50\" y2=\"100\"/><line stroke=\"#ff0000\" stroke-width=\"2\" x1=\"150\" x2=\"200\" y1=\"55\" y2=\"55\"/><text font-size=\"10\" text-anchor=\"start\" x=\"0\" y=\"110\">prefix</text><text font-size=\"10\" text-anchor=\"start\" x=\"100\" y=\"110\">cycle</text>\n",
-       "<text font-size=\"10\" text-anchor=\"start\" x=\"150\" y=\"110\">cycle</text></svg>"
+       "\n",
+       "<svg height=\"112\" width=\"200\" xmlns=\"http://www.w3.org/2000/svg\" version=\"1.1\">\n",
+       "<rect x=\"0\" y=\"0\" width=\"200\" height=\"100\" fill=\"#f4f4f4\"/>\n",
+       "<line x1=\"100\" y1=\"0\" x2=\"100\" y2=\"100\"\n",
+       "      stroke=\"white\" stroke-width=\"4\"/>\n",
+       "<line x1=\"150\" y1=\"0\" x2=\"150\" y2=\"100\"\n",
+       "      stroke=\"white\" stroke-width=\"4\"/>\n",
+       "<line x1=\"0\" y1=\"0\" x2=\"200\" y2=\"0\" stroke=\"white\" stroke-width=\"4\"/><text x=\"3\" y=\"30\" text-anchor=\"start\" font-size=\"20\">a</text><line x1=\"50\" y1=\"0\" x2=\"50\" y2=\"50\" stroke=\"white\" stroke-width=\"1\"/><line x1=\"0\" y1=\"45\" x2=\"50\" y2=\"45\" stroke=\"#ff0000\" stroke-width=\"2\"/><line x1=\"100\" y1=\"0\" x2=\"100\" y2=\"50\" stroke=\"white\" stroke-width=\"1\"/><line x1=\"50\" y1=\"5\" x2=\"50\" y2=\"45\" stroke=\"#ff0000\" stroke-width=\"2\"/><line x1=\"50\" y1=\"5\" x2=\"100\" y2=\"5\" stroke=\"#ff0000\" stroke-width=\"2\"/><line x1=\"150\" y1=\"0\" x2=\"150\" y2=\"50\" stroke=\"white\" stroke-width=\"1\"/><line x1=\"100\" y1=\"5\" x2=\"150\" y2=\"5\" stroke=\"#ff0000\" stroke-width=\"2\"/><line x1=\"200\" y1=\"0\" x2=\"200\" y2=\"50\" stroke=\"white\" stroke-width=\"1\"/><line x1=\"150\" y1=\"5\" x2=\"200\" y2=\"5\" stroke=\"#ff0000\" stroke-width=\"2\"/><line x1=\"0\" y1=\"50\" x2=\"200\" y2=\"50\" stroke=\"white\" stroke-width=\"4\"/><text x=\"3\" y=\"80\" text-anchor=\"start\" font-size=\"20\">b</text><line x1=\"50\" y1=\"50\" x2=\"50\" y2=\"100\" stroke=\"white\" stroke-width=\"1\"/><line x1=\"100\" y1=\"50\" x2=\"100\" y2=\"100\" stroke=\"white\" stroke-width=\"1\"/><line x1=\"150\" y1=\"50\" x2=\"150\" y2=\"100\" stroke=\"white\" stroke-width=\"1\"/><line x1=\"100\" y1=\"55\" x2=\"150\" y2=\"55\" stroke=\"#ff0000\" stroke-width=\"2\"/><line x1=\"200\" y1=\"50\" x2=\"200\" y2=\"100\" stroke=\"white\" stroke-width=\"1\"/><line x1=\"150\" y1=\"55\" x2=\"200\" y2=\"55\" stroke=\"#ff0000\" stroke-width=\"2\"/><text x=\"0\" y=\"110\" text-anchor=\"start\" font-size=\"10\">prefix</text><text x=\"100\" y=\"110\" text-anchor=\"start\" font-size=\"10\">cycle</text>\n",
+       "<text x=\"150\" y=\"110\" text-anchor=\"start\" font-size=\"10\">cycle</text></svg>"
       ],
       "text/plain": [
-       "<IPython.core.display.SVG object>"
+       "<spot.jupyter.SVG object>"
       ]
      },
      "execution_count": 6,
@@ -382,7 +385,7 @@
        "$\\lnot a; \\mathsf{cycle}\\{a \\land b\\}$"
       ],
       "text/plain": [
-       "<spot.twa_word; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_word > *' at 0x7f4e4c652810> >"
+       "<spot.twa_word; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_word > *' at 0x7f956c0388a0> >"
       ]
      },
      "execution_count": 9,
@@ -433,7 +436,7 @@
        "$a; a \\land b; \\mathsf{cycle}\\{\\lnot a \\land \\lnot b; \\lnot a \\land b\\}$"
       ],
       "text/plain": [
-       "<spot.twa_word; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_word > *' at 0x7f4e4c574600> >"
+       "<spot.twa_word; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_word > *' at 0x7f956c038b70> >"
       ]
      },
      "execution_count": 11,
@@ -454,15 +457,18 @@
     {
      "data": {
       "image/svg+xml": [
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-       "<text font-size=\"10\" text-anchor=\"start\" x=\"200\" y=\"110\">cycle</text></svg>"
+       "\n",
+       "<svg height=\"112\" width=\"300\" xmlns=\"http://www.w3.org/2000/svg\" version=\"1.1\">\n",
+       "<rect x=\"0\" y=\"0\" width=\"300\" height=\"100\" fill=\"#f4f4f4\"/>\n",
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+       "<line x1=\"200\" y1=\"0\" x2=\"200\" y2=\"100\"\n",
+       "      stroke=\"white\" stroke-width=\"4\"/>\n",
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+       "<text x=\"200\" y=\"110\" text-anchor=\"start\" font-size=\"10\">cycle</text></svg>"
       ],
       "text/plain": [
-       "<IPython.core.display.SVG object>"
+       "<spot.jupyter.SVG object>"
       ]
      },
      "execution_count": 12,
@@ -492,79 +498,79 @@
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        " \"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\">\n",
-       "<!-- Generated by graphviz version 2.40.1 (20161225.0304)\n",
+       "<!-- Generated by graphviz version 2.43.0 (0)\n",
        " -->\n",
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        "<svg width=\"380pt\" height=\"86pt\"\n",
-       " viewBox=\"0.00 0.00 380.00 86.29\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\">\n",
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-       "<text text-anchor=\"start\" x=\"175\" y=\"-48.0859\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">[all]</text>\n",
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+       "<text text-anchor=\"start\" x=\"175\" y=\"-48.16\" font-family=\"Lato\" font-size=\"14.00\">[all]</text>\n",
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-       "<text text-anchor=\"middle\" x=\"56\" y=\"-18.5859\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">0</text>\n",
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        "<g id=\"edge5\" class=\"edge\">\n",
        "<title>3&#45;&gt;2</title>\n",
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-       "<text text-anchor=\"start\" x=\"279\" y=\"-7.0859\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">!a &amp; b</text>\n",
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       "text/plain": [
-       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f4e4c6528a0> >"
+       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f956c0388d0> >"
       ]
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      "execution_count": 13,
@@ -593,7 +599,7 @@
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    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.6.7"
+   "version": "3.7.5"
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