dot: name the digraph

* spot/twaalgos/dot.cc: Here.
* NEWS: Mention the change.
* tests/core/alternating.test, tests/core/det.test,
tests/core/dstar.test, tests/core/monitor.test,
tests/core/neverclaimread.test, tests/core/readsave.test,
tests/core/sccdot.test, tests/core/tgbagraph.test,
tests/python/_altscc.ipynb, tests/python/_autparserr.ipynb,
tests/python/alternation.ipynb, tests/python/atva16-fig2a.ipynb,
tests/python/atva16-fig2b.ipynb, tests/python/automata-io.ipynb,
tests/python/automata.ipynb, tests/python/decompose.ipynb,
tests/python/gen.ipynb, tests/python/highlighting.ipynb,
tests/python/ltsmin-dve.ipynb, tests/python/ltsmin-pml.ipynb,
tests/python/parity.ipynb, tests/python/product.ipynb,
tests/python/randaut.ipynb, tests/python/satmin.ipynb,
tests/python/stutter-inv.ipynb, tests/python/testingaut.ipynb,
tests/python/word.ipynb: Adjust test cases.

NEWS

@@ -20,6 +20,12 @@ New in spot 2.5.2.dev (not yet released)
     files produced by "dot -Tsvg" will show those as popups.
     This is also done for state labels of kripke structures.
 
+  - print_dot() will now name the output digraph using the name of the
+    automaton if available, or the empty string otherwise.  (Previous
+    versions used to call all digraphs "G".)  This name appears as a
+    tooltip in SVG figures when the mouse is over the acceptance
+    condition.
+
   - cleanup_parity() and cleanup_parity_here() are smarter and now
     remove from the acceptance condition the parity colors that are
     not used in the automaton.

spot/twaalgos/dot.cc

@@ -78,7 +78,8 @@ namespace spot
       std::vector<std::pair<unsigned, unsigned>>* sprod_ = nullptr;
       std::vector<unsigned>* orig_ = nullptr;
       std::set<unsigned>* incomplete_ = nullptr;
-      std::string* name_ = nullptr;
+      std::string* name_ = nullptr; // title for the graph
+      std::string* graph_name_ = nullptr; // name for the digraph
       std::map<std::pair<int, int>, int> univ_done;
 
       acc_cond::mark_t inf_sets_ = {};
@@ -473,7 +474,10 @@ namespace spot
         // UTF-8 has no glyphs for circled numbers larger than MAX_BULLET.
         if (opt_bullet && (aut_->num_sets() <= MAX_BULLET || opt_latex_))
           opt_all_bullets = true;
-        os_ << "digraph G {\n";
+        os_ << "digraph \"";
+        if (graph_name_)
+          escape_str(os_, *graph_name_);
+        os_ << "\" {\n";
         if (opt_latex_)
           {
             os_ << "  d2tgraphstyle=\"every node/.style={align=center}\"\n";
@@ -783,8 +787,9 @@ namespace spot
           aut->get_named_prop<std::map<unsigned, unsigned>>("highlight-states");
         incomplete_ =
           aut->get_named_prop<std::set<unsigned>>("incomplete-states");
+        graph_name_ = aut_->get_named_prop<std::string>("automaton-name");
         if (opt_name_)
-          name_ = aut_->get_named_prop<std::string>("automaton-name");
+          name_ = graph_name_;
         mark_states_ = (!opt_force_acc_trans_
                         && aut_->prop_state_acc().is_true());
         dcircles_ = (mark_states_

tests/core/alternating.test

@@ -1,6 +1,6 @@
 #!/bin/sh
 # -*- coding: utf-8 -*-
-# Copyright (C) 2016, 2017 Laboratoire de Recherche et Développement
+# Copyright (C) 2016-2018 Laboratoire de Recherche et Développement
 # de l'Epita (LRDE).
 #
 # This file is part of Spot, a model checking library.
@@ -56,7 +56,7 @@ EOF
 autfilt --dot=bans alt.hoa >alt.dot
 
 cat >expect.dot <<EOF
-digraph G {
+digraph "" {
   rankdir=LR
   label="Fin(⓿)\n[co-Büchi]"
   labelloc="t"
@@ -498,7 +498,7 @@ run 0 autfilt --dot='baryf(Lato)' ex6 > ex6.dot
 
 style='arrowhead=onormal'
 cat >expect6.dot<<EOF
-digraph G {
+digraph "" {
   rankdir=LR
   label=<Fin(<font color="#1F78B4">⓿</font>)<br/>[co-Büchi]>
   labelloc="t"
@@ -561,7 +561,7 @@ run 0 autfilt --dot='sbarf(Lato)' ex7 > ex7.dot
 color='<font color="#1F78B4">⓿</font>'
 color1='<font color="#FF4DA0">❶</font>'
 cat >expect7.dot<<EOF
-digraph G {
+digraph "SLAA for c R (c | G(a & b) | (F!b & F!a))" {
   rankdir=LR
   label=<Fin($color1) &amp; Fin($color)<br/>[Streett-like 2]>
   labelloc="t"
@@ -657,7 +657,7 @@ EOF
 run 0 autfilt --dot='sbarf(Lato)' ex8 > ex8.dot
 
 cat >expect8.dot<<EOF
-digraph G {
+digraph "SLAA for c R (c | G(a & b) | (F!b & F!a))" {
   rankdir=LR
   label=<Fin($color1) &amp; Fin($color)<br/>[Streett-like 2]>
   labelloc="t"
@@ -737,7 +737,7 @@ EOF
 run 0 autfilt --dot='baryf(Lato)' ex9 > ex9.dot
 
 cat >expect9.dot <<EOF
-digraph G {
+digraph "" {
   rankdir=LR
   label=<Fin(<font color="#1F78B4">⓿</font>)<br/>[co-Büchi]>
   labelloc="t"
@@ -784,7 +784,7 @@ EOF
 run 0 autfilt --dot='baryf(Lato)' ex10 > ex10.dot
 
 cat >expect10.dot <<EOF
-digraph G {
+digraph "" {
   rankdir=LR
   label=<Fin(<font color="#1F78B4">⓿</font>)<br/>[co-Büchi]>
   labelloc="t"
@@ -840,7 +840,7 @@ EOF
 run 2 autfilt --dot='sbarf(Lato)' ex11 > ex11.dot
 
 cat >expect11.dot <<EOF
-digraph G {
+digraph "SLAA for G((b & Fa) | (!b & G!a))" {
   rankdir=LR
   label=<Fin(<font color="#1F78B4">⓿</font>)<br/>[co-Büchi]>
   labelloc="t"

tests/core/det.test

@@ -114,7 +114,7 @@ run 0 autfilt -q --are-isomorph ex.hoa out.hoa
 
 run 0 ../ikwiad -x -DC 'GFa & XGFb' > out.tgba
 cat >ex.tgba <<EOF
-digraph G {
+digraph "GFa & XGFb" {
   rankdir=LR
   label="\n[Büchi]"
   labelloc="t"

tests/core/dstar.test

@@ -59,7 +59,7 @@ EOF
 run 0 ../ikwiad -d -XD dra.dstar | tee stdout
 
 cat >expected <<EOF
-digraph G {
+digraph "" {
   rankdir=LR
   label="Fin(0) & Inf(1)\n[Rabin 1]"
   labelloc="t"
@@ -83,7 +83,7 @@ diff expected stdout
 run 0 ../ikwiad -d -XDB -R3 dra.dstar | tee stdout
 
 cat >expected <<EOF
-digraph G {
+digraph "" {
   rankdir=LR
   label="\n[Büchi]"
   labelloc="t"
@@ -130,7 +130,7 @@ EOF
 run 0 ../ikwiad -d -XDB dsa.dstar | tee stdout
 
 cat >expected <<EOF
-digraph G {
+digraph "" {
   rankdir=LR
   label="\n[Büchi]"
   labelloc="t"
@@ -221,7 +221,7 @@ EOF
 run 0 autfilt -dA -B dra.dstar | tee stdout
 
 cat >expected <<EOF
-digraph G {
+digraph "" {
   rankdir=LR
   node [shape="circle"]
   I [label="", style=invis, width=0]
@@ -245,7 +245,7 @@ digraph G {
   4 -> 3 [label="!a"]
   4 -> 4 [label="a"]
 }
-digraph G {
+digraph "" {
   rankdir=LR
   node [shape="circle"]
   I [label="", style=invis, width=0]
@@ -290,7 +290,7 @@ EOF
 run 0 dstar2tgba --name=%F --dot=Ant aut.dsa | tee stdout
 
 cat >expected<<EOF
-digraph G {
+digraph "aut.dsa" {
   rankdir=LR
   label="aut.dsa"
   labelloc="t"

tests/core/monitor.test

@@ -32,7 +32,7 @@ expect()
 }
 
 expect ltl2tgba -dA --monitor a <<EOF
-digraph G {
+digraph "a" {
   rankdir=LR
   node [shape="circle"]
   I [label="", style=invis, width=0]

tests/core/neverclaimread.test

@@ -132,7 +132,7 @@ EOF
 run 0 ../ikwiad -XN input > stdout
 
 cat >expected <<EOF
-digraph G {
+digraph "" {
   rankdir=LR
   label="\n[Büchi]"
   labelloc="t"
@@ -327,7 +327,7 @@ accept_all:
 EOF
 autfilt --name=%F --dot=nsc <input >stdout 2>stderr && exit 1
 cat >expected <<EOF
-digraph G {
+digraph "-" {
   rankdir=LR
   label="-\n[Büchi]"
   labelloc="t"

tests/core/readsave.test

@@ -319,7 +319,7 @@ autfilt -H input |
     autfilt >output
 
 cat >expected <<EOF
-digraph G {
+digraph "" {
   node [shape="circle"]
   /* hello world */
   I [label="", style=invis, height=0]
@@ -355,7 +355,7 @@ test 1 = `autfilt -H input --complete | autfilt --is-complete --count`
 SPOT_DEFAULT_FORMAT=hoa ltl2tgba --dot=ak 'GFa & GFb' >output
 cat output
 cat >expected <<EOF
-digraph G {
+digraph "G(Fa & Fb)" {
   rankdir=LR
   label="Inf(0)&Inf(1)\n[gen. Büchi 2]"
   labelloc="t"
@@ -374,7 +374,7 @@ diff output expected
 ltl2tgba -dban 'GFa & GFb' >output
 cat output
 cat >expected <<EOF
-digraph G {
+digraph "G(Fa & Fb)" {
   rankdir=LR
   label="G(Fa & Fb)\nInf(⓿)&Inf(❶)\n[gen. Büchi 2]"
   labelloc="t"
@@ -397,7 +397,7 @@ cat output
 zero='<font color="#1F78B4">⓿</font>'
 one='<font color="#FF4DA0">❶</font>'
 cat >expected <<EOF
-digraph G {
+digraph "G(Fa & Fb)" {
   rankdir=LR
   label=<Inf($zero)&amp;Inf($one)<br/>[gen. Büchi 2]>
   labelloc="t"
@@ -468,7 +468,7 @@ State: 9 {0 2 3}
 EOF
 
 cat >expected <<EOF
-digraph G {
+digraph "" {
   rankdir=LR
   label="(Fin(⓿)|Fin(❸)) | (Fin(❶) & Inf(❷))\n[gen. Rabin 3]"
   labelloc="t"
@@ -522,7 +522,7 @@ autfilt --dot=bao in >out
 diff out expected
 
 cat >expected2 <<EOF
-digraph G {
+digraph "" {
   rankdir=LR
   label="(Fin(⓿)|Fin(❸)) | (Fin(❶) & Inf(❷))\n[gen. Rabin 3]"
   labelloc="t"
@@ -547,7 +547,7 @@ autfilt --dot=bao1 in | grep -v '>' >out
 diff out expected2
 
 cat >expected3 <<EOF
-digraph G {
+digraph "" {
   rankdir=LR
   node [shape="circle"]
   I [label="", style=invis, width=0]
@@ -869,7 +869,7 @@ diff output6 expect6
 
 run 0 autfilt -dAk input6 >output6d
 cat >expect6d <<EOF
-digraph G {
+digraph "" {
   rankdir=LR
   I [label="", style=invis, width=0]
   I -> 1
@@ -890,7 +890,7 @@ diff output6d expect6d
 
 run 0 autfilt -dbark input6 >output6d2
 cat >expect6d2 <<EOF
-digraph G {
+digraph "" {
   rankdir=LR
   label=<Inf(<font color="#1F78B4">⓿</font>)<br/>[Büchi]>
   labelloc="t"
@@ -1008,7 +1008,7 @@ State: 2
 EOF
 autfilt -dA input9 > output9
 cat >expected9 <<EOF
-digraph G {
+digraph "a U (b U c)" {
   rankdir=LR
   node [shape="circle"]
   I [label="", style=invis, width=0]
@@ -1052,9 +1052,9 @@ cat >expected <<EOF
 EOF
 diff out expected
 # --dot=d should also not use circles
-ltl2tgba 'a U b' | autfilt --remove-ap=b=0 --dot=dA >out
+ltl2tgba 'a U b' | autfilt --remove-ap=b=0 --name=%M --dot=dA >out
 cat >expected <<EOF
-digraph G {
+digraph "a U b" {
   rankdir=LR
   I [label="", style=invis, width=0]
   I -> 0

tests/core/sccdot.test

@@ -1,7 +1,7 @@
 #!/bin/sh
 # -*- coding: utf-8 -*-
-# Copyright (C) 2015, 2017 Laboratoire de Recherche et Développement de
+# Copyright (C) 2015, 2017, 2018 Laboratoire de Recherche et
-# l'Epita
+# Développement de l'Epita
 #
 # This file is part of Spot, a model checking library.
 #
@@ -72,7 +72,7 @@ run 0 autfilt --dot=as in.hoa > out.dot
 
 # The important stuff is the color=xxx lines
 cat <<EOF >expected
-digraph G {
+digraph "" {
   rankdir=LR
   label="(Inf(0)&Inf(1)) & Fin(2)\n[Streett-like 3]"
   labelloc="t"

tests/core/tgbagraph.test

@@ -35,7 +35,7 @@ run 0 ../tgbagraph | tee stdout
 cat >expected <<EOF
 p1
 p2
-digraph G {
+digraph "" {
   rankdir=LR
   label="t\n[Fin-less 2]"
   labelloc="t"
@@ -53,7 +53,7 @@ digraph G {
   2 -> 1 [label="!p1 | p2"]
   2 -> 2 [label="1\n{0,1}"]
 }
-digraph G {
+digraph "" {
   rankdir=LR
   label="t\n[Fin-less 2]"
   labelloc="t"
@@ -69,7 +69,7 @@ digraph G {
   2 [label="2"]
   2 -> 0 [label="p1 | p2\n{0,1}"]
 }
-digraph G {
+digraph "" {
   rankdir=LR
   label="t\n[Fin-less 2]"
   labelloc="t"
@@ -84,7 +84,7 @@ digraph G {
   1 -> 2 [label="p1 & p2\n{0}"]
   2 [label="2"]
 }
-digraph G {
+digraph "" {
   rankdir=LR
   label="t\n[Fin-less 2]"
   labelloc="t"
@@ -102,7 +102,7 @@ digraph G {
   2 -> 1 [label="!p1 | p2"]
   2 -> 0 [label="1\n{0,1}"]
 }
-digraph G {
+digraph "" {
   rankdir=LR
   label="t\n[Fin-less 2]"
   labelloc="t"
@@ -118,7 +118,7 @@ digraph G {
   2 -> 0 [label="1\n{0,1}"]
   2 -> 1 [label="!p1 | p2"]
 }
-digraph G {
+digraph "" {
   rankdir=LR
   label="t\n[Fin-less 2]"
   labelloc="t"
@@ -233,7 +233,7 @@ digraph G {
   101 [label="101"]
   102 [label="102"]
 }
-digraph G {
+digraph "" {
   rankdir=LR
   label="t\n[all]"
   labelloc="t"
@@ -247,7 +247,7 @@ digraph G {
 0 -> deleted
 1 -> deleted
 2 -> 0
-digraph G {
+digraph "" {
   rankdir=LR
   label="t\n[all]"
   labelloc="t"

tests/python/_autparserr.ipynb

@@ -71,49 +71,53 @@
        "<?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 2.38.0 (20140413.2041)\n",
+       "<!-- Generated by graphviz version 2.40.1 (20161225.0304)\n",
        " -->\n",
-       "<!-- Title: G Pages: 1 -->\n",
+       "<!-- Pages: 1 -->\n",
        "<svg width=\"133pt\" height=\"141pt\"\n",
        " viewBox=\"0.00 0.00 133.00 140.80\" 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(4 136.8)\">\n",
-       "<title>G</title>\n",
+       "<polygon fill=\"#ffffff\" stroke=\"transparent\" points=\"-4,4 -4,-136.8 129,-136.8 129,4 -4,4\"/>\n",
-       "<polygon fill=\"white\" stroke=\"none\" points=\"-4,4 -4,-136.8 129,-136.8 129,4 -4,4\"/>\n",
+       "<text text-anchor=\"start\" x=\"39.5\" y=\"-102.6\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">[Büchi]</text>\n",
-       "<text text-anchor=\"start\" x=\"39.5\" y=\"-102.6\" font-family=\"Lato\" font-size=\"14.00\">[Büchi]</text>\n",
        "<!-- I -->\n",
        "<!-- 1 -->\n",
-       "<g id=\"node2\" class=\"node\"><title>1</title>\n",
+       "<g id=\"node2\" class=\"node\">\n",
-       "<ellipse fill=\"#ffffaa\" stroke=\"black\" cx=\"107\" cy=\"-42\" rx=\"18\" ry=\"18\"/>\n",
+       "<title>1</title>\n",
-       "<text text-anchor=\"middle\" x=\"107\" y=\"-38.3\" font-family=\"Lato\" font-size=\"14.00\">1</text>\n",
+       "<ellipse fill=\"#ffffaa\" stroke=\"#000000\" cx=\"107\" cy=\"-42\" rx=\"18\" ry=\"18\"/>\n",
+       "<text text-anchor=\"middle\" x=\"107\" y=\"-38.3\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">1</text>\n",
        "</g>\n",
        "<!-- I&#45;&gt;1 -->\n",
-       "<g id=\"edge1\" class=\"edge\"><title>I&#45;&gt;1</title>\n",
+       "<g id=\"edge1\" class=\"edge\">\n",
-       "<path fill=\"none\" stroke=\"black\" d=\"M23.0602,-62.9848C24.6706,-62.5773 58.2688,-54.0766 82.2014,-48.0213\"/>\n",
+       "<title>I&#45;&gt;1</title>\n",
-       "<polygon fill=\"black\" stroke=\"black\" points=\"89.2724,-46.2323 83.2589,-51.0031 85.8793,-47.0908 82.4862,-47.9493 82.4862,-47.9493 82.4862,-47.9493 85.8793,-47.0908 81.7135,-44.8956 89.2724,-46.2323 89.2724,-46.2323\"/>\n",
+       "<path fill=\"none\" stroke=\"#000000\" d=\"M22.5428,-62.8659C27.0788,-61.7452 59.0892,-53.8368 82.363,-48.0868\"/>\n",
+       "<polygon fill=\"#000000\" stroke=\"#000000\" points=\"89.2653,-46.3815 83.2252,-51.1186 85.8675,-47.221 82.4696,-48.0605 82.4696,-48.0605 82.4696,-48.0605 85.8675,-47.221 81.7141,-45.0025 89.2653,-46.3815 89.2653,-46.3815\"/>\n",
        "</g>\n",
        "<!-- 1&#45;&gt;1 -->\n",
-       "<g id=\"edge3\" class=\"edge\"><title>1&#45;&gt;1</title>\n",
+       "<g id=\"edge3\" class=\"edge\">\n",
-       "<path fill=\"none\" stroke=\"black\" d=\"M99.9688,-58.6641C98.4062,-68.625 100.75,-78 107,-78 111.688,-78 114.178,-72.7266 114.471,-65.8876\"/>\n",
+       "<title>1&#45;&gt;1</title>\n",
-       "<polygon fill=\"black\" stroke=\"black\" points=\"114.031,-58.6641 117.601,-65.4598 114.244,-62.1576 114.456,-65.6511 114.456,-65.6511 114.456,-65.6511 114.244,-62.1576 111.312,-65.8425 114.031,-58.6641 114.031,-58.6641\"/>\n",
+       "<path fill=\"none\" stroke=\"#000000\" d=\"M99.9688,-58.6641C98.4063,-68.625 100.75,-78 107,-78 111.6875,-78 114.1777,-72.7266 114.4707,-65.8876\"/>\n",
-       "<text text-anchor=\"middle\" x=\"107\" y=\"-81.8\" font-family=\"Lato\" font-size=\"14.00\">1</text>\n",
+       "<polygon fill=\"#000000\" stroke=\"#000000\" points=\"114.0313,-58.6641 117.6006,-65.4598 114.2438,-62.1576 114.4564,-65.6511 114.4564,-65.6511 114.4564,-65.6511 114.2438,-62.1576 111.3122,-65.8425 114.0313,-58.6641 114.0313,-58.6641\"/>\n",
+       "<text text-anchor=\"middle\" x=\"107\" y=\"-81.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">1</text>\n",
        "</g>\n",
        "<!-- 0 -->\n",
-       "<g id=\"node3\" class=\"node\"><title>0</title>\n",
+       "<g id=\"node3\" class=\"node\">\n",
-       "<ellipse fill=\"#ffffaa\" stroke=\"black\" cx=\"22\" cy=\"-22\" rx=\"18\" ry=\"18\"/>\n",
+       "<title>0</title>\n",
-       "<ellipse fill=\"none\" stroke=\"black\" cx=\"22\" cy=\"-22\" rx=\"22\" ry=\"22\"/>\n",
+       "<ellipse fill=\"#ffffaa\" stroke=\"#000000\" cx=\"22\" cy=\"-22\" rx=\"18\" ry=\"18\"/>\n",
-       "<text text-anchor=\"middle\" x=\"22\" y=\"-18.3\" font-family=\"Lato\" font-size=\"14.00\">0</text>\n",
+       "<ellipse fill=\"none\" stroke=\"#000000\" cx=\"22\" cy=\"-22\" rx=\"22\" ry=\"22\"/>\n",
+       "<text text-anchor=\"middle\" x=\"22\" y=\"-18.3\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">0</text>\n",
        "</g>\n",
        "<!-- 0&#45;&gt;1 -->\n",
-       "<g id=\"edge2\" class=\"edge\"><title>0&#45;&gt;1</title>\n",
+       "<g id=\"edge2\" class=\"edge\">\n",
-       "<path fill=\"none\" stroke=\"black\" d=\"M43.5169,-26.9438C55.3149,-29.7867 70.1833,-33.3695 82.4561,-36.3268\"/>\n",
+       "<title>0&#45;&gt;1</title>\n",
-       "<polygon fill=\"black\" stroke=\"black\" points=\"89.3394,-37.9854 81.7962,-39.4079 85.9368,-37.1655 82.5342,-36.3455 82.5342,-36.3455 82.5342,-36.3455 85.9368,-37.1655 83.2721,-33.2832 89.3394,-37.9854 89.3394,-37.9854\"/>\n",
+       "<path fill=\"none\" stroke=\"#000000\" d=\"M43.4491,-27.0468C55.2894,-29.8328 70.0459,-33.3049 82.3583,-36.202\"/>\n",
-       "<text text-anchor=\"middle\" x=\"66.5\" y=\"-37.8\" font-family=\"Lato\" font-size=\"14.00\">1</text>\n",
+       "<polygon fill=\"#000000\" stroke=\"#000000\" points=\"89.2847,-37.8317 81.7492,-39.2946 85.8777,-37.03 82.4708,-36.2283 82.4708,-36.2283 82.4708,-36.2283 85.8777,-37.03 83.1923,-33.1621 89.2847,-37.8317 89.2847,-37.8317\"/>\n",
+       "<text text-anchor=\"middle\" x=\"66.5\" y=\"-37.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">1</text>\n",
        "</g>\n",
        "</g>\n",
        "</svg>\n"
       ],
       "text/plain": [
-       "<spot.impl.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f6380ea5f30> >"
+       "<spot.impl.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f336055bed0> >"
       ]
      },
      "metadata": {},
@@ -127,8 +131,8 @@
       "Traceback \u001b[0;36m(most recent call last)\u001b[0m:\n",
       "  File \u001b[1;32m\"/home/adl/.local/lib/python3.6/site-packages/IPython/core/interactiveshell.py\"\u001b[0m, line \u001b[1;32m2910\u001b[0m, in \u001b[1;35mrun_code\u001b[0m\n    exec(code_obj, self.user_global_ns, self.user_ns)\n",
       "  File \u001b[1;32m\"<ipython-input-3-f46d719f71bc>\"\u001b[0m, line \u001b[1;32m1\u001b[0m, in \u001b[1;35m<module>\u001b[0m\n    for a in spot.automata('_example.aut'):\n",
-      "  File \u001b[1;32m\"/home/adl/git/spot/python/spot/__init__.py\"\u001b[0m, line \u001b[1;32m446\u001b[0m, in \u001b[1;35mautomata\u001b[0m\n    a = p.parse(_bdd_dict).aut\n",
+      "  File \u001b[1;32m\"/home/adl/git/spot/python/spot/__init__.py\"\u001b[0m, line \u001b[1;32m457\u001b[0m, in \u001b[1;35mautomata\u001b[0m\n    a = p.parse(_bdd_dict).aut\n",
-      "\u001b[0;36m  File \u001b[0;32m\"/home/adl/git/spot/python/spot/impl.py\"\u001b[0;36m, line \u001b[0;32m5173\u001b[0;36m, in \u001b[0;35mparse\u001b[0;36m\u001b[0m\n\u001b[0;31m    return _impl.automaton_stream_parser_parse(self, *args)\u001b[0m\n",
+      "\u001b[0;36m  File \u001b[0;32m\"/home/adl/git/spot/python/spot/impl.py\"\u001b[0;36m, line \u001b[0;32m5201\u001b[0;36m, in \u001b[0;35mparse\u001b[0;36m\u001b[0m\n\u001b[0;31m    return _impl.automaton_stream_parser_parse(self, *args)\u001b[0m\n",
       "\u001b[0;36m  File \u001b[0;32m\"<string>\"\u001b[0;36m, line \u001b[0;32munknown\u001b[0m\n\u001b[0;31mSyntaxError\u001b[0m\u001b[0;31m:\u001b[0m \n_example.aut:20.2: syntax error, unexpected identifier\n_example.aut:20.1-3: ignoring this invalid label\n_example.aut:20.5: state number is larger than state count...\n_example.aut:14.1-9: ... declared here.\n\n"
      ]
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       "text/plain": [
-       "<spot.impl.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f6380e09360> >"
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@@ -223,8 +231,8 @@
       "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
       "\u001b[0;31mCalledProcessError\u001b[0m                        Traceback (most recent call last)",
       "\u001b[0;32m<ipython-input-5-6b4750207d55>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m()\u001b[0m\n\u001b[0;32m----> 1\u001b[0;31m \u001b[0mspot\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mautomaton\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m'non-existing-cmd |'\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
-      "\u001b[0;32m~/git/spot/python/spot/__init__.py\u001b[0m in \u001b[0;36mautomaton\u001b[0;34m(filename, **kwargs)\u001b[0m\n\u001b[1;32m    479\u001b[0m     See `spot.automata` for a list of supported formats.\"\"\"\n\u001b[1;32m    480\u001b[0m     \u001b[0;32mtry\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m--> 481\u001b[0;31m         \u001b[0;32mreturn\u001b[0m \u001b[0mnext\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mautomata\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mfilename\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0;34m**\u001b[0m\u001b[0mkwargs\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m    482\u001b[0m     \u001b[0;32mexcept\u001b[0m \u001b[0mStopIteration\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m    483\u001b[0m         \u001b[0;32mraise\u001b[0m \u001b[0mRuntimeError\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m\"Failed to read automaton from {}\"\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mformat\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mfilename\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
+      "\u001b[0;32m~/git/spot/python/spot/__init__.py\u001b[0m in \u001b[0;36mautomaton\u001b[0;34m(filename, **kwargs)\u001b[0m\n\u001b[1;32m    483\u001b[0m     See `spot.automata` for a list of supported formats.\"\"\"\n\u001b[1;32m    484\u001b[0m     \u001b[0;32mtry\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m--> 485\u001b[0;31m         \u001b[0;32mreturn\u001b[0m \u001b[0mnext\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mautomata\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mfilename\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0;34m**\u001b[0m\u001b[0mkwargs\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m    486\u001b[0m     \u001b[0;32mexcept\u001b[0m \u001b[0mStopIteration\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m    487\u001b[0m         \u001b[0;32mraise\u001b[0m \u001b[0mRuntimeError\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m\"Failed to read automaton from {}\"\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mformat\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mfilename\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
-      "\u001b[0;32m~/git/spot/python/spot/__init__.py\u001b[0m in \u001b[0;36mautomata\u001b[0;34m(timeout, ignore_abort, trust_hoa, no_sid, debug, *sources)\u001b[0m\n\u001b[1;32m    464\u001b[0m                 \u001b[0;32mdel\u001b[0m \u001b[0mproc\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m    465\u001b[0m                 \u001b[0;32mif\u001b[0m \u001b[0mret\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m--> 466\u001b[0;31m                     \u001b[0;32mraise\u001b[0m \u001b[0msubprocess\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mCalledProcessError\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mret\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0mfilename\u001b[0m\u001b[0;34m[\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m-\u001b[0m\u001b[0;36m1\u001b[0m\u001b[0;34m]\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m    467\u001b[0m     \u001b[0;31m# deleting o explicitely now prevents Python 3.5 from\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m    468\u001b[0m     \u001b[0;31m# reporting the following error: \"<built-in function\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
+      "\u001b[0;32m~/git/spot/python/spot/__init__.py\u001b[0m in \u001b[0;36mautomata\u001b[0;34m(timeout, ignore_abort, trust_hoa, no_sid, debug, *sources)\u001b[0m\n\u001b[1;32m    468\u001b[0m                 \u001b[0;31m# an exception.\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m    469\u001b[0m                 \u001b[0;32mif\u001b[0m \u001b[0mret\u001b[0m \u001b[0;32mand\u001b[0m \u001b[0msys\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mexc_info\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m[\u001b[0m\u001b[0;36m0\u001b[0m\u001b[0;34m]\u001b[0m \u001b[0;32mis\u001b[0m \u001b[0;32mNone\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m--> 470\u001b[0;31m                     \u001b[0;32mraise\u001b[0m \u001b[0msubprocess\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mCalledProcessError\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mret\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0mfilename\u001b[0m\u001b[0;34m[\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m-\u001b[0m\u001b[0;36m1\u001b[0m\u001b[0;34m]\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m    471\u001b[0m     \u001b[0;31m# deleting o explicitly now prevents Python 3.5 from\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m    472\u001b[0m     \u001b[0;31m# reporting the following error: \"<built-in function\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
       "\u001b[0;31mCalledProcessError\u001b[0m: Command 'non-existing-cmd ' returned non-zero exit status 127."
      ]
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@@ -246,8 +254,8 @@
       "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
       "\u001b[0;31mTimeoutExpired\u001b[0m                            Traceback (most recent call last)",
       "\u001b[0;32m<ipython-input-6-e4289051db4c>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m()\u001b[0m\n\u001b[0;32m----> 1\u001b[0;31m \u001b[0mspot\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mautomaton\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m'sleep 3; cat _example.aut |'\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0mtimeout\u001b[0m\u001b[0;34m=\u001b[0m\u001b[0;36m1\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
-      "\u001b[0;32m~/git/spot/python/spot/__init__.py\u001b[0m in \u001b[0;36mautomaton\u001b[0;34m(filename, **kwargs)\u001b[0m\n\u001b[1;32m    479\u001b[0m     See `spot.automata` for a list of supported formats.\"\"\"\n\u001b[1;32m    480\u001b[0m     \u001b[0;32mtry\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m--> 481\u001b[0;31m         \u001b[0;32mreturn\u001b[0m \u001b[0mnext\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mautomata\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mfilename\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0;34m**\u001b[0m\u001b[0mkwargs\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m    482\u001b[0m     \u001b[0;32mexcept\u001b[0m \u001b[0mStopIteration\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m    483\u001b[0m         \u001b[0;32mraise\u001b[0m \u001b[0mRuntimeError\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m\"Failed to read automaton from {}\"\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mformat\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mfilename\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
+      "\u001b[0;32m~/git/spot/python/spot/__init__.py\u001b[0m in \u001b[0;36mautomaton\u001b[0;34m(filename, **kwargs)\u001b[0m\n\u001b[1;32m    483\u001b[0m     See `spot.automata` for a list of supported formats.\"\"\"\n\u001b[1;32m    484\u001b[0m     \u001b[0;32mtry\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m--> 485\u001b[0;31m         \u001b[0;32mreturn\u001b[0m \u001b[0mnext\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mautomata\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mfilename\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0;34m**\u001b[0m\u001b[0mkwargs\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m    486\u001b[0m     \u001b[0;32mexcept\u001b[0m \u001b[0mStopIteration\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m    487\u001b[0m         \u001b[0;32mraise\u001b[0m \u001b[0mRuntimeError\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m\"Failed to read automaton from {}\"\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mformat\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mfilename\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
-      "\u001b[0;32m~/git/spot/python/spot/__init__.py\u001b[0m in \u001b[0;36mautomata\u001b[0;34m(timeout, ignore_abort, trust_hoa, no_sid, debug, *sources)\u001b[0m\n\u001b[1;32m    423\u001b[0m                 \u001b[0;32melse\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m    424\u001b[0m                     \u001b[0;32mtry\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m--> 425\u001b[0;31m                         \u001b[0mout\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0merr\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0mproc\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mcommunicate\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mtimeout\u001b[0m\u001b[0;34m=\u001b[0m\u001b[0mtimeout\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m    426\u001b[0m                     \u001b[0;32mexcept\u001b[0m \u001b[0msubprocess\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mTimeoutExpired\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m    427\u001b[0m                         \u001b[0;31m# Using subprocess.check_output() with timeout\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
+      "\u001b[0;32m~/git/spot/python/spot/__init__.py\u001b[0m in \u001b[0;36mautomata\u001b[0;34m(timeout, ignore_abort, trust_hoa, no_sid, debug, *sources)\u001b[0m\n\u001b[1;32m    424\u001b[0m                 \u001b[0;32melse\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m    425\u001b[0m                     \u001b[0;32mtry\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m--> 426\u001b[0;31m                         \u001b[0mout\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0merr\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0mproc\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mcommunicate\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mtimeout\u001b[0m\u001b[0;34m=\u001b[0m\u001b[0mtimeout\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m    427\u001b[0m                     \u001b[0;32mexcept\u001b[0m \u001b[0msubprocess\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mTimeoutExpired\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m    428\u001b[0m                         \u001b[0;31m# Using subprocess.check_output() with timeout\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
       "\u001b[0;32m/usr/lib/python3.6/subprocess.py\u001b[0m in \u001b[0;36mcommunicate\u001b[0;34m(self, input, timeout)\u001b[0m\n\u001b[1;32m    841\u001b[0m \u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m    842\u001b[0m             \u001b[0;32mtry\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m--> 843\u001b[0;31m                 \u001b[0mstdout\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0mstderr\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0mself\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0m_communicate\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0minput\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0mendtime\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0mtimeout\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m    844\u001b[0m             \u001b[0;32mfinally\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m    845\u001b[0m                 \u001b[0mself\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0m_communication_started\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0;32mTrue\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
       "\u001b[0;32m/usr/lib/python3.6/subprocess.py\u001b[0m in \u001b[0;36m_communicate\u001b[0;34m(self, input, endtime, orig_timeout)\u001b[0m\n\u001b[1;32m   1513\u001b[0m \u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m   1514\u001b[0m                     \u001b[0mready\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0mselector\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mselect\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mtimeout\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m-> 1515\u001b[0;31m                     \u001b[0mself\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0m_check_timeout\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mendtime\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0morig_timeout\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m   1516\u001b[0m \u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m   1517\u001b[0m                     \u001b[0;31m# XXX Rewrite these to use non-blocking I/O on the file\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
       "\u001b[0;32m/usr/lib/python3.6/subprocess.py\u001b[0m in \u001b[0;36m_check_timeout\u001b[0;34m(self, endtime, orig_timeout)\u001b[0m\n\u001b[1;32m    869\u001b[0m             \u001b[0;32mreturn\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m    870\u001b[0m         \u001b[0;32mif\u001b[0m \u001b[0m_time\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m)\u001b[0m \u001b[0;34m>\u001b[0m \u001b[0mendtime\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m--> 871\u001b[0;31m             \u001b[0;32mraise\u001b[0m \u001b[0mTimeoutExpired\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mself\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0margs\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0morig_timeout\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m    872\u001b[0m \u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m    873\u001b[0m \u001b[0;34m\u001b[0m\u001b[0m\n",
@@ -270,55 +278,61 @@
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       "text/plain": [
-       "<spot.impl.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f6380e098a0> >"
+       "<spot.impl.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f33605650f0> >"
       ]
      },
      "metadata": {},
@@ -332,7 +346,7 @@
       "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
       "\u001b[0;31mCalledProcessError\u001b[0m                        Traceback (most recent call last)",
       "\u001b[0;32m<ipython-input-7-cf613d56390d>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m()\u001b[0m\n\u001b[0;32m----> 1\u001b[0;31m \u001b[0;32mfor\u001b[0m \u001b[0ma\u001b[0m \u001b[0;32min\u001b[0m \u001b[0mspot\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mautomata\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m\"ltl2tgba 'a U b'|\"\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0;34m'ltl2tgba \"syntax U U error\"|'\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m      2\u001b[0m     \u001b[0mdisplay\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0ma\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
-      "\u001b[0;32m~/git/spot/python/spot/__init__.py\u001b[0m in \u001b[0;36mautomata\u001b[0;34m(timeout, ignore_abort, trust_hoa, no_sid, debug, *sources)\u001b[0m\n\u001b[1;32m    464\u001b[0m                 \u001b[0;32mdel\u001b[0m \u001b[0mproc\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m    465\u001b[0m                 \u001b[0;32mif\u001b[0m \u001b[0mret\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m--> 466\u001b[0;31m                     \u001b[0;32mraise\u001b[0m \u001b[0msubprocess\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mCalledProcessError\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mret\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0mfilename\u001b[0m\u001b[0;34m[\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m-\u001b[0m\u001b[0;36m1\u001b[0m\u001b[0;34m]\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m    467\u001b[0m     \u001b[0;31m# deleting o explicitely now prevents Python 3.5 from\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m    468\u001b[0m     \u001b[0;31m# reporting the following error: \"<built-in function\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
+      "\u001b[0;32m~/git/spot/python/spot/__init__.py\u001b[0m in \u001b[0;36mautomata\u001b[0;34m(timeout, ignore_abort, trust_hoa, no_sid, debug, *sources)\u001b[0m\n\u001b[1;32m    468\u001b[0m                 \u001b[0;31m# an exception.\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m    469\u001b[0m                 \u001b[0;32mif\u001b[0m \u001b[0mret\u001b[0m \u001b[0;32mand\u001b[0m \u001b[0msys\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mexc_info\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m[\u001b[0m\u001b[0;36m0\u001b[0m\u001b[0;34m]\u001b[0m \u001b[0;32mis\u001b[0m \u001b[0;32mNone\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m--> 470\u001b[0;31m                     \u001b[0;32mraise\u001b[0m \u001b[0msubprocess\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mCalledProcessError\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mret\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0mfilename\u001b[0m\u001b[0;34m[\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m-\u001b[0m\u001b[0;36m1\u001b[0m\u001b[0;34m]\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m    471\u001b[0m     \u001b[0;31m# deleting o explicitly now prevents Python 3.5 from\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m    472\u001b[0m     \u001b[0;31m# reporting the following error: \"<built-in function\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
       "\u001b[0;31mCalledProcessError\u001b[0m: Command 'ltl2tgba \"syntax U U error\"' returned non-zero exit status 2."
      ]
     }
@@ -361,12 +375,12 @@
      "traceback": [
       "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
       "\u001b[0;31mStopIteration\u001b[0m                             Traceback (most recent call last)",
-      "\u001b[0;32m~/git/spot/python/spot/__init__.py\u001b[0m in \u001b[0;36mautomaton\u001b[0;34m(filename, **kwargs)\u001b[0m\n\u001b[1;32m    480\u001b[0m     \u001b[0;32mtry\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m--> 481\u001b[0;31m         \u001b[0;32mreturn\u001b[0m \u001b[0mnext\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mautomata\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mfilename\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0;34m**\u001b[0m\u001b[0mkwargs\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m    482\u001b[0m     \u001b[0;32mexcept\u001b[0m \u001b[0mStopIteration\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
+      "\u001b[0;32m~/git/spot/python/spot/__init__.py\u001b[0m in \u001b[0;36mautomaton\u001b[0;34m(filename, **kwargs)\u001b[0m\n\u001b[1;32m    484\u001b[0m     \u001b[0;32mtry\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m--> 485\u001b[0;31m         \u001b[0;32mreturn\u001b[0m \u001b[0mnext\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mautomata\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mfilename\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0;34m**\u001b[0m\u001b[0mkwargs\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m    486\u001b[0m     \u001b[0;32mexcept\u001b[0m \u001b[0mStopIteration\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
       "\u001b[0;31mStopIteration\u001b[0m: ",
       "\nDuring handling of the above exception, another exception occurred:\n",
       "\u001b[0;31mRuntimeError\u001b[0m                              Traceback (most recent call last)",
       "\u001b[0;32m<ipython-input-8-139f3bb684aa>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m()\u001b[0m\n\u001b[0;32m----> 1\u001b[0;31m \u001b[0mspot\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mautomaton\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m'true|'\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
-      "\u001b[0;32m~/git/spot/python/spot/__init__.py\u001b[0m in \u001b[0;36mautomaton\u001b[0;34m(filename, **kwargs)\u001b[0m\n\u001b[1;32m    481\u001b[0m         \u001b[0;32mreturn\u001b[0m \u001b[0mnext\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mautomata\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mfilename\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0;34m**\u001b[0m\u001b[0mkwargs\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m    482\u001b[0m     \u001b[0;32mexcept\u001b[0m \u001b[0mStopIteration\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m--> 483\u001b[0;31m         \u001b[0;32mraise\u001b[0m \u001b[0mRuntimeError\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m\"Failed to read automaton from {}\"\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mformat\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mfilename\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m    484\u001b[0m \u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m    485\u001b[0m \u001b[0;34m\u001b[0m\u001b[0m\n",
+      "\u001b[0;32m~/git/spot/python/spot/__init__.py\u001b[0m in \u001b[0;36mautomaton\u001b[0;34m(filename, **kwargs)\u001b[0m\n\u001b[1;32m    485\u001b[0m         \u001b[0;32mreturn\u001b[0m \u001b[0mnext\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mautomata\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mfilename\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0;34m**\u001b[0m\u001b[0mkwargs\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m    486\u001b[0m     \u001b[0;32mexcept\u001b[0m \u001b[0mStopIteration\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m--> 487\u001b[0;31m         \u001b[0;32mraise\u001b[0m \u001b[0mRuntimeError\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m\"Failed to read automaton from {}\"\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mformat\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mfilename\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m    488\u001b[0m \u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m    489\u001b[0m \u001b[0;34m\u001b[0m\u001b[0m\n",
       "\u001b[0;31mRuntimeError\u001b[0m: Failed to read automaton from true|"
      ]
     }
@@ -401,7 +415,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.6.4+"
+   "version": "3.6.5"
   }
  },
  "nbformat": 4,

tests/python/alternation.ipynb

@@ -27,7 +27,7 @@
       "image/svg+xml": [
        "<svg height=\"227pt\" viewBox=\"0.00 0.00 478.08 226.74\" width=\"478pt\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\">\n",
        "<g class=\"graph\" id=\"graph0\" transform=\"scale(1 1) rotate(0) translate(4 222.7401)\">\n",
-       "<title>G</title>\n",
+       "<title>VWAA for FGa &amp;&amp; GFb</title>\n",
        "<polygon fill=\"#ffffff\" points=\"-4,4 -4,-222.7401 474.0802,-222.7401 474.0802,4 -4,4\" stroke=\"transparent\"/>\n",
        "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"212.5401\" y=\"-204.5401\">Fin(</text>\n",
        "<text fill=\"#1f78b4\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"237.5401\" y=\"-204.5401\">⓿</text>\n",
@@ -249,11 +249,10 @@
        " \"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\">\n",
        "<!-- Generated by graphviz version 2.40.1 (20161225.0304)\n",
        " -->\n",
-       "<!-- Title: G Pages: 1 -->\n",
+       "<!-- Pages: 1 -->\n",
        "<svg width=\"596pt\" height=\"212pt\"\n",
        " viewBox=\"0.00 0.00 596.19 212.09\" 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(4 208.0864)\">\n",
-       "<title>G</title>\n",
        "<polygon fill=\"#ffffff\" stroke=\"transparent\" points=\"-4,4 -4,-208.0864 592.1892,-208.0864 592.1892,4 -4,4\"/>\n",
        "<text text-anchor=\"start\" x=\"247.0946\" y=\"-189.8864\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">Inf(</text>\n",
        "<text text-anchor=\"start\" x=\"269.0946\" y=\"-189.8864\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#1f78b4\">⓿</text>\n",
@@ -412,7 +411,7 @@
        "</svg>\n"
       ],
       "text/plain": [
-       "<spot.impl.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f74000699f0> >"
+       "<spot.impl.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7fefe020aa20> >"
       ]
      },
      "execution_count": 3,
@@ -437,11 +436,10 @@
        " \"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\">\n",
        "<!-- Generated by graphviz version 2.40.1 (20161225.0304)\n",
        " -->\n",
-       "<!-- Title: G Pages: 1 -->\n",
+       "<!-- Pages: 1 -->\n",
        "<svg width=\"570pt\" height=\"200pt\"\n",
        " viewBox=\"0.00 0.00 570.19 200.38\" 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(4 196.3847)\">\n",
-       "<title>G</title>\n",
        "<polygon fill=\"#ffffff\" stroke=\"transparent\" points=\"-4,4 -4,-196.3847 566.1892,-196.3847 566.1892,4 -4,4\"/>\n",
        "<text text-anchor=\"start\" x=\"260.0946\" y=\"-178.1847\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">Inf(</text>\n",
        "<text text-anchor=\"start\" x=\"282.0946\" y=\"-178.1847\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#1f78b4\">⓿</text>\n",
@@ -582,7 +580,7 @@
        "</svg>\n"
       ],
       "text/plain": [
-       "<spot.impl.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f74001bff30> >"
+       "<spot.impl.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7fefe02e5f60> >"
       ]
      },
      "execution_count": 4,
@@ -604,7 +602,6 @@
       "image/svg+xml": [
        "<svg height=\"180pt\" viewBox=\"0.00 0.00 385.48 180.21\" width=\"385pt\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\">\n",
        "<g class=\"graph\" id=\"graph0\" transform=\"scale(1 1) rotate(0) translate(4 176.2143)\">\n",
-       "<title>G</title>\n",
        "<polygon fill=\"#ffffff\" points=\"-4,4 -4,-176.2143 381.4802,-176.2143 381.4802,4 -4,4\" stroke=\"transparent\"/>\n",
        "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"166.2401\" y=\"-158.0143\">Fin(</text>\n",
        "<text fill=\"#1f78b4\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"191.2401\" y=\"-158.0143\">⓿</text>\n",
@@ -758,11 +755,10 @@
        " \"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\">\n",
        "<!-- Generated by graphviz version 2.40.1 (20161225.0304)\n",
        " -->\n",
-       "<!-- Title: G Pages: 1 -->\n",
+       "<!-- Pages: 1 -->\n",
        "<svg width=\"564pt\" height=\"195pt\"\n",
        " viewBox=\"0.00 0.00 563.89 194.87\" 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(4 190.8684)\">\n",
-       "<title>G</title>\n",
        "<polygon fill=\"#ffffff\" stroke=\"transparent\" points=\"-4,4 -4,-190.8684 559.8939,-190.8684 559.8939,4 -4,4\"/>\n",
        "<text text-anchor=\"start\" x=\"256.9469\" y=\"-172.6684\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">Inf(</text>\n",
        "<text text-anchor=\"start\" x=\"278.9469\" y=\"-172.6684\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#1f78b4\">⓿</text>\n",
@@ -884,7 +880,7 @@
        "</svg>\n"
       ],
       "text/plain": [
-       "<spot.impl.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f7400069900> >"
+       "<spot.impl.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7fefe020ab40> >"
       ]
      },
      "execution_count": 6,
@@ -906,7 +902,6 @@
       "image/svg+xml": [
        "<svg height=\"193pt\" viewBox=\"0.00 0.00 510.48 193.21\" width=\"510pt\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\">\n",
        "<g class=\"graph\" id=\"graph0\" transform=\"scale(1 1) rotate(0) translate(4 189.2143)\">\n",
-       "<title>G</title>\n",
        "<polygon fill=\"#ffffff\" points=\"-4,4 -4,-189.2143 506.4802,-189.2143 506.4802,4 -4,4\" stroke=\"transparent\"/>\n",
        "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"228.7401\" y=\"-171.0143\">Fin(</text>\n",
        "<text fill=\"#1f78b4\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"253.7401\" y=\"-171.0143\">⓿</text>\n",
@@ -1106,11 +1101,10 @@
        " \"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\">\n",
        "<!-- Generated by graphviz version 2.40.1 (20161225.0304)\n",
        " -->\n",
-       "<!-- Title: G Pages: 1 -->\n",
+       "<!-- Pages: 1 -->\n",
        "<svg width=\"734pt\" height=\"176pt\"\n",
        " viewBox=\"0.00 0.00 734.00 175.72\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\">\n",
        "<g id=\"graph0\" class=\"graph\" transform=\"scale(.7059 .7059) rotate(0) translate(4 244.9146)\">\n",
-       "<title>G</title>\n",
        "<polygon fill=\"#ffffff\" stroke=\"transparent\" points=\"-4,4 -4,-244.9146 1035.7636,-244.9146 1035.7636,4 -4,4\"/>\n",
        "<text text-anchor=\"start\" x=\"494.8818\" y=\"-226.7146\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">Inf(</text>\n",
        "<text text-anchor=\"start\" x=\"516.8818\" y=\"-226.7146\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#1f78b4\">⓿</text>\n",
@@ -1285,7 +1279,7 @@
        "</svg>\n"
       ],
       "text/plain": [
-       "<spot.impl.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f7400079150> >"
+       "<spot.impl.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7fefe021a990> >"
       ]
      },
      "execution_count": 8,
@@ -1307,7 +1301,6 @@
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        "<svg height=\"308pt\" viewBox=\"0.00 0.00 522.82 307.87\" width=\"523pt\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\">\n",
        "<g class=\"graph\" id=\"graph0\" transform=\"scale(1 1) rotate(0) translate(4 303.8701)\">\n",
-       "<title>G</title>\n",
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        "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"234.9102\" y=\"-285.6701\">Fin(</text>\n",
        "<text fill=\"#1f78b4\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"259.9102\" y=\"-285.6701\">⓿</text>\n",
@@ -1556,11 +1549,10 @@
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        "<!-- Generated by graphviz version 2.40.1 (20161225.0304)\n",
        " -->\n",
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@@ -1801,7 +1793,7 @@
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@@ -1826,11 +1818,11 @@
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        "<!-- Generated by graphviz version 2.40.1 (20161225.0304)\n",
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-       "<!-- Title: G Pages: 1 -->\n",
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        "<g id=\"graph0\" class=\"graph\" transform=\"scale(1 1) rotate(0) translate(4 126.7401)\">\n",
-       "<title>G</title>\n",
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@@ -1911,7 +1903,7 @@
        "</svg>\n"
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@@ -1955,11 +1947,10 @@
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@@ -2011,7 +2002,7 @@
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       ],
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-       "<spot.impl.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f7400150090> >"
+       "<spot.impl.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7fefe0279fc0> >"
       ]
      },
      "execution_count": 12,

tests/python/atva16-fig2a.ipynb

@@ -10,9 +10,7 @@
   {
    "cell_type": "code",
    "execution_count": 1,
-   "metadata": {
+   "metadata": {},
-    "collapsed": true
-   },
    "outputs": [],
    "source": [
     "import spot\n",
@@ -22,9 +20,7 @@
   {
    "cell_type": "code",
    "execution_count": 2,
-   "metadata": {
+   "metadata": {},
-    "collapsed": false
-   },
    "outputs": [
     {
      "data": {
@@ -47,9 +43,7 @@
   {
    "cell_type": "code",
    "execution_count": 3,
-   "metadata": {
+   "metadata": {},
-    "collapsed": false
-   },
    "outputs": [
     {
      "data": {
@@ -57,92 +51,103 @@
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        "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\"\n",
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-       "<text text-anchor=\"start\" x=\"85.75\" y=\"-332.8\" font-family=\"Lato\" font-size=\"14.00\">)&amp;Inf(</text>\n",
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-       "<text text-anchor=\"start\" x=\"50.75\" y=\"-318.8\" font-family=\"Lato\" font-size=\"14.00\">[gen. Büchi 2]</text>\n",
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-       "<text text-anchor=\"start\" x=\"148.5\" y=\"-71.8\" font-family=\"Lato\" font-size=\"14.00\">!a &amp; !b</text>\n",
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+       "<text text-anchor=\"start\" x=\"148.5\" y=\"-71.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">!a &amp; !b</text>\n",
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@@ -150,7 +155,7 @@
        "</svg>\n"
       ],
       "text/plain": [
-       "<spot.impl.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f0d2406cc00> >"
+       "<spot.impl.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f3264654bd0> >"
       ]
      },
      "execution_count": 3,
@@ -165,9 +170,7 @@
   {
    "cell_type": "code",
    "execution_count": 4,
-   "metadata": {
+   "metadata": {},
-    "collapsed": true
-   },
    "outputs": [],
    "source": [
     "def implies(f, g):\n",
@@ -181,9 +184,7 @@
   {
    "cell_type": "code",
    "execution_count": 5,
-   "metadata": {
+   "metadata": {},
-    "collapsed": false
-   },
    "outputs": [
     {
      "data": {
@@ -203,9 +204,7 @@
   {
    "cell_type": "code",
    "execution_count": 6,
-   "metadata": {
+   "metadata": {},
-    "collapsed": false
-   },
    "outputs": [
     {
      "data": {
@@ -239,7 +238,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.5.4"
+   "version": "3.6.5"
   }
  },
  "nbformat": 4,

tests/python/atva16-fig2b.ipynb

@@ -10,9 +10,7 @@
   {
    "cell_type": "code",
    "execution_count": 1,
-   "metadata": {
+   "metadata": {},
-    "collapsed": true
-   },
    "outputs": [],
    "source": [
     "import spot\n",
@@ -25,9 +23,7 @@
   {
    "cell_type": "code",
    "execution_count": 2,
-   "metadata": {
+   "metadata": {},
-    "collapsed": true
-   },
    "outputs": [],
    "source": [
     "%%dve adding\n",
@@ -50,9 +46,7 @@
   {
    "cell_type": "code",
    "execution_count": 3,
-   "metadata": {
+   "metadata": {},
-    "collapsed": false
-   },
    "outputs": [
     {
      "data": {
@@ -77,9 +71,7 @@
   {
    "cell_type": "code",
    "execution_count": 4,
-   "metadata": {
+   "metadata": {},
-    "collapsed": false
-   },
    "outputs": [
     {
      "data": {
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@@ -282,9 +304,7 @@
   {
    "cell_type": "code",
    "execution_count": 5,
-   "metadata": {
+   "metadata": {},
-    "collapsed": true
-   },
    "outputs": [],
    "source": [
     "def model_check(model, f):\n",
@@ -297,9 +317,7 @@
   {
    "cell_type": "code",
    "execution_count": 6,
-   "metadata": {
+   "metadata": {},
-    "collapsed": false
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@@ -333,7 +351,7 @@
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  },
  "nbformat": 4,

tests/python/automata-io.ipynb

@@ -59,7 +59,7 @@
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tests/python/automata.ipynb

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@@ -1534,7 +1523,7 @@
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@@ -1647,7 +1635,7 @@
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@@ -1672,11 +1660,10 @@
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@@ -2193,7 +2180,7 @@
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@@ -2282,11 +2269,10 @@
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@@ -2405,7 +2391,7 @@
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@@ -2419,11 +2405,10 @@
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@@ -2556,7 +2541,7 @@
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@@ -2570,11 +2555,10 @@
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@@ -2729,7 +2713,7 @@
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@@ -2743,11 +2727,10 @@
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@@ -2905,7 +2888,7 @@
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@@ -2942,11 +2925,10 @@
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@@ -3092,7 +3074,7 @@
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@@ -3117,11 +3099,10 @@
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@@ -3169,7 +3150,7 @@
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@@ -3191,7 +3172,6 @@
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@@ -3255,7 +3235,6 @@
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@@ -3317,7 +3296,6 @@
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@@ -3446,7 +3424,6 @@
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@@ -3612,11 +3589,10 @@
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@@ -3667,7 +3643,7 @@
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       "text/plain": [
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@@ -3702,11 +3678,10 @@
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@@ -3768,7 +3743,7 @@
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@@ -3800,11 +3775,10 @@
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@@ -3842,7 +3816,7 @@
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       "text/plain": [
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+       "<spot.impl.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7fbe1efee030> >"
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@@ -3871,7 +3845,6 @@
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@@ -3961,11 +3934,10 @@
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@@ -4008,7 +3980,7 @@
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@@ -4040,11 +4012,10 @@
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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 tmpfz39v5au.pml...\n",
+      "Parsing tmpqado0fcz.pml...\n",
-      "Parsing tmpfz39v5au.pml done (0.0 sec)\n",
+      "Parsing tmpqado0fcz.pml done (0.0 sec)\n",
       "\n",
       "Optimizing graphs...\n",
       "   StateMerging changed 0 states/transitions.\n",
@@ -225,8 +225,8 @@
       "   Found          2 /          2 (100.0%) Commuting actions               \n",
       "Generating guard dependency matrices done (0.0 sec)\n",
       "\n",
-      "Written C code to /home/adl/git/spot/tests/python/tmpfz39v5au.pml.spins.c\n",
+      "Written C code to /home/adl/git/spot/tests/python/tmpqado0fcz.pml.spins.c\n",
-      "Compiled C code to PINS library tmpfz39v5au.pml.spins\n",
+      "Compiled C code to PINS library tmpqado0fcz.pml.spins\n",
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        "<!-- 9 -->\n",
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tests/python/product.ipynb

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@@ -1253,7 +1244,6 @@
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@@ -1318,7 +1308,6 @@
        "</g>\n",
        "</svg></td><td style=\"vertical-align: top;\"><svg height=\"220pt\" viewBox=\"0.00 0.00 208.02 220.00\" width=\"208pt\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\">\n",
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        "<text fill=\"#ff4da0\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"75.0096\" y=\"-197.8\">❶</text>\n",
@@ -1404,7 +1393,6 @@
        "</g>\n",
        "</svg></td><td style=\"vertical-align: top;\"><svg height=\"360pt\" viewBox=\"0.00 0.00 213.36 360.00\" width=\"213pt\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\">\n",
        "<g class=\"graph\" id=\"graph0\" transform=\"scale(.687 .687) rotate(0) translate(4 520)\">\n",
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@@ -1787,7 +1775,6 @@
       "text/html": [
        "<table><tr><td style=\"vertical-align: top;\"><svg height=\"307pt\" viewBox=\"0.00 0.00 99.00 307.00\" width=\"99pt\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\">\n",
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@@ -1852,7 +1839,6 @@
        "</g>\n",
        "</svg></td><td style=\"vertical-align: top;\"><svg height=\"220pt\" viewBox=\"0.00 0.00 208.02 220.00\" width=\"208pt\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\">\n",
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        "<text fill=\"#ff4da0\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"75.0096\" y=\"-197.8\">❶</text>\n",
@@ -1938,7 +1924,6 @@
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@@ -2227,7 +2212,6 @@
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@@ -2486,7 +2470,7 @@
      "name": "stdout",
      "output_type": "stream",
      "text": [
-      "252 µs ± 4.96 µs per loop (mean ± std. dev. of 7 runs, 1000 loops each)\n"
+      "254 µs ± 11.3 µs per loop (mean ± std. dev. of 7 runs, 1000 loops each)\n"
      ]
     }
    ],
@@ -2503,7 +2487,7 @@
      "name": "stdout",
      "output_type": "stream",
      "text": [
-      "3.4 µs ± 210 ns per loop (mean ± std. dev. of 7 runs, 100000 loops each)\n"
+      "3.35 µs ± 149 ns per loop (mean ± std. dev. of 7 runs, 100000 loops each)\n"
      ]
     }
    ],

tests/python/satmin.ipynb

@@ -67,11 +67,10 @@
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@@ -257,7 +256,7 @@
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@@ -289,11 +288,10 @@
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@@ -446,7 +444,7 @@
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@@ -478,11 +476,10 @@
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@@ -683,7 +680,7 @@
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@@ -722,11 +719,11 @@
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        "<g id=\"graph0\" class=\"graph\" transform=\"scale(.7976 .7976) rotate(0) translate(4 323.9411)\">\n",
-       "<title>G</title>\n",
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@@ -916,7 +913,7 @@
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@@ -1007,11 +1004,10 @@
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@@ -1116,7 +1112,7 @@
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@@ -1148,11 +1144,10 @@
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        "<!-- Generated by graphviz version 2.40.1 (20161225.0304)\n",
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-       "<!-- Title: G Pages: 1 -->\n",
+       "<!-- Pages: 1 -->\n",
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@@ -1289,7 +1284,7 @@
        "</svg>\n"
       ],
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+       "<spot.impl.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7feac4610a20> >"
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      "execution_count": 9,
@@ -1321,11 +1316,10 @@
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        " -->\n",
-       "<!-- Title: G Pages: 1 -->\n",
+       "<!-- Pages: 1 -->\n",
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        " viewBox=\"0.00 0.00 635.35 203.30\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\">\n",
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-       "<title>G</title>\n",
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@@ -1456,7 +1450,7 @@
        "</svg>\n"
       ],
       "text/plain": [
-       "<spot.impl.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x14faa9cbc720> >"
+       "<spot.impl.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7feac4610b70> >"
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      "execution_count": 10,
@@ -1528,7 +1522,7 @@
        "      <td>NaN</td>\n",
        "      <td>1428</td>\n",
        "      <td>73430</td>\n",
-       "      <td>58</td>\n",
+       "      <td>3</td>\n",
        "      <td>0</td>\n",
        "      <td>1</td>\n",
        "      <td>0</td>\n",
@@ -1542,9 +1536,9 @@
        "      <td>40</td>\n",
        "      <td>3960</td>\n",
        "      <td>336307</td>\n",
-       "      <td>268</td>\n",
+       "      <td>12</td>\n",
        "      <td>1</td>\n",
-       "      <td>18</td>\n",
+       "      <td>20</td>\n",
        "      <td>0</td>\n",
        "    </tr>\n",
        "    <tr>\n",
@@ -1556,7 +1550,7 @@
        "      <td>32</td>\n",
        "      <td>2008</td>\n",
        "      <td>116372</td>\n",
-       "      <td>92</td>\n",
+       "      <td>4</td>\n",
        "      <td>0</td>\n",
        "      <td>4</td>\n",
        "      <td>0</td>\n",
@@ -1572,9 +1566,9 @@
        "2            5             4                4    12          32      2008   \n",
        "\n",
        "  clauses enc.user enc.sys sat.user sat.sys  \n",
-       "0   73430       58       0        1       0  \n",
+       "0   73430        3       0        1       0  \n",
-       "1  336307      268       1       18       0  \n",
+       "1  336307       12       1       20       0  \n",
-       "2  116372       92       0        4       0  "
+       "2  116372        4       0        4       0  "
       ]
      },
      "metadata": {},
@@ -1588,11 +1582,10 @@
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-       "<title>G</title>\n",
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@@ -1723,7 +1716,7 @@
        "</svg>\n"
       ],
       "text/plain": [
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+       "<spot.impl.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7feac8bff780> >"
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      },
      "execution_count": 11,
@@ -1791,7 +1784,7 @@
        "      <td>NaN</td>\n",
        "      <td>483</td>\n",
        "      <td>24470</td>\n",
-       "      <td>20</td>\n",
+       "      <td>1</td>\n",
        "      <td>0</td>\n",
        "      <td>0</td>\n",
        "      <td>0</td>\n",
@@ -1805,9 +1798,9 @@
        "      <td>40</td>\n",
        "      <td>1335</td>\n",
        "      <td>111187</td>\n",
-       "      <td>88</td>\n",
+       "      <td>4</td>\n",
        "      <td>0</td>\n",
-       "      <td>3</td>\n",
+       "      <td>2</td>\n",
        "      <td>0</td>\n",
        "    </tr>\n",
        "    <tr>\n",
@@ -1819,7 +1812,7 @@
        "      <td>32</td>\n",
        "      <td>856</td>\n",
        "      <td>57332</td>\n",
-       "      <td>46</td>\n",
+       "      <td>2</td>\n",
        "      <td>0</td>\n",
        "      <td>1</td>\n",
        "      <td>0</td>\n",
@@ -1835,9 +1828,9 @@
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-       "0   24470       20       0        0       0  \n",
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-       "1  111187       88       0        3       0  \n",
+       "1  111187        4       0        2       0  \n",
-       "2   57332       46       0        1       0  "
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@@ -2056,10 +2048,10 @@
        "      <td>40</td>\n",
        "      <td>3050</td>\n",
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-       "      <td>441</td>\n",
-       "      <td>1</td>\n",
        "      <td>16</td>\n",
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-       "      <td>1</td>\n",
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@@ -2100,9 +2092,9 @@
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        "\n",
        "  clauses enc.user enc.sys sat.user sat.sys  \n",
-       "0  437037      441       1       16       1  \n",
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-       "1   28449       29       0        0       0  \n",
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@@ -2269,9 +2260,9 @@
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        "      <td>3894</td>\n",
        "      <td>258719</td>\n",
-       "      <td>148</td>\n",
+       "      <td>8</td>\n",
-       "      <td>1</td>\n",
+       "      <td>0</td>\n",
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@@ -2283,9 +2274,9 @@
        "      <td>40</td>\n",
        "      <td>2005</td>\n",
        "      <td>106302</td>\n",
-       "      <td>62</td>\n",
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-       "      <td>1</td>\n",
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@@ -2297,7 +2288,7 @@
        "      <td>32</td>\n",
        "      <td>676</td>\n",
        "      <td>24632</td>\n",
-       "      <td>14</td>\n",
+       "      <td>1</td>\n",
        "      <td>0</td>\n",
        "      <td>0</td>\n",
        "      <td>0</td>\n",
@@ -2311,7 +2302,7 @@
        "      <td>NaN</td>\n",
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        "      <td>10553</td>\n",
-       "      <td>7</td>\n",
+       "      <td>1</td>\n",
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@@ -2328,10 +2319,10 @@
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        "\n",
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-       "0  258719      148       1        5       0  \n",
+       "0  258719        8       0        7       0  \n",
-       "1  106302       62       0        1       0  \n",
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-       "2   24632       14       0        0       0  \n",
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-       "3   10553        7       0        0       0  "
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@@ -2550,8 +2540,8 @@
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        "      <td>258963</td>\n",
-       "      <td>151</td>\n",
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@@ -2566,7 +2556,7 @@
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-       "      <td>0</td>\n",
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@@ -2594,8 +2584,8 @@
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        "\n",
        "  clauses enc.user enc.sys sat.user sat.sys  \n",
-       "0  258963      151       1        3       0  \n",
+       "0  258963        8       0        3       0  \n",
-       "1  258963        0       0        0       0  \n",
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@@ -2804,9 +2793,9 @@
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@@ -2820,7 +2809,7 @@
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@@ -2846,7 +2835,7 @@
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@@ -2863,10 +2852,10 @@
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-       "3   10325        6       0        1       0  "
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@@ -3201,9 +3188,9 @@
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        "      <td>258719</td>\n",
-       "      <td>150</td>\n",
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-       "      <td>2</td>\n",
+       "      <td>0</td>\n",
-       "      <td>5</td>\n",
+       "      <td>6</td>\n",
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@@ -3246,7 +3233,7 @@
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@@ -3264,10 +3251,10 @@
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-       "3   10325        7       0        0       0   \n",
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@@ -3313,11 +3300,10 @@
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@@ -3506,7 +3492,7 @@
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        "<text text-anchor=\"start\" x=\"252.2401\" y=\"-143.6701\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#1f78b4\">⓿</text>\n",
@@ -3817,7 +3801,7 @@
        "</svg>\n"
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       "text/plain": [
-       "<spot.impl.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x14faae26a1e0> >"
+       "<spot.impl.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7feac8ba9090> >"
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      "metadata": {},
@@ -3855,11 +3839,11 @@
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        "<!-- Generated by graphviz version 2.40.1 (20161225.0304)\n",
        " -->\n",
-       "<!-- Title: G Pages: 1 -->\n",
+       "<!-- Title: &amp; | F G a F b F G c Pages: 1 -->\n",
        "<svg width=\"734pt\" height=\"262pt\"\n",
        " viewBox=\"0.00 0.00 734.00 261.56\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\">\n",
        "<g id=\"graph0\" class=\"graph\" transform=\"scale(.7976 .7976) rotate(0) translate(4 323.9411)\">\n",
-       "<title>G</title>\n",
+       "<title>&amp; | F G a F b F G c</title>\n",
        "<polygon fill=\"#ffffff\" stroke=\"transparent\" points=\"-4,4 -4,-323.9411 916.2935,-323.9411 916.2935,4 -4,4\"/>\n",
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@@ -4049,7 +4033,7 @@
        "</svg>\n"
       ],
       "text/plain": [
-       "<spot.impl.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x14faa9c9f690> >"
+       "<spot.impl.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7feac4610c30> >"
       ]
      },
      "execution_count": 19,
@@ -4117,8 +4101,8 @@
        "      <td>NaN</td>\n",
        "      <td>975</td>\n",
        "      <td>32912</td>\n",
-       "      <td>20</td>\n",
+       "      <td>2</td>\n",
-       "      <td>1</td>\n",
+       "      <td>0</td>\n",
        "      <td>0</td>\n",
        "      <td>0</td>\n",
        "    </tr>\n",
@@ -4131,9 +4115,9 @@
        "      <td>32</td>\n",
        "      <td>2705</td>\n",
        "      <td>150257</td>\n",
-       "      <td>87</td>\n",
+       "      <td>5</td>\n",
-       "      <td>0</td>\n",
+       "      <td>1</td>\n",
-       "      <td>2</td>\n",
+       "      <td>3</td>\n",
        "      <td>0</td>\n",
        "    </tr>\n",
        "  </tbody>\n",
@@ -4146,8 +4130,8 @@
        "1            6             5                4    10          32      2705   \n",
        "\n",
        "  clauses enc.user enc.sys sat.user sat.sys  \n",
-       "0   32912       20       1        0       0  \n",
+       "0   32912        2       0        0       0  \n",
-       "1  150257       87       0        2       0  "
+       "1  150257        5       1        3       0  "
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@@ -4161,11 +4145,10 @@
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        " -->\n",
-       "<!-- Title: G Pages: 1 -->\n",
+       "<!-- Pages: 1 -->\n",
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@@ -4278,7 +4261,7 @@
        "</svg>\n"
       ],
       "text/plain": [
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+       "<spot.impl.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7feac8ba9330> >"
       ]
      },
      "execution_count": 20,
@@ -4340,9 +4323,9 @@
        "      <td>32</td>\n",
        "      <td>1732</td>\n",
        "      <td>77340</td>\n",
-       "      <td>45</td>\n",
+       "      <td>3</td>\n",
        "      <td>0</td>\n",
-       "      <td>1</td>\n",
+       "      <td>2</td>\n",
        "      <td>0</td>\n",
        "    </tr>\n",
        "    <tr>\n",
@@ -4354,7 +4337,7 @@
        "      <td>NaN</td>\n",
        "      <td>162</td>\n",
        "      <td>3129</td>\n",
-       "      <td>2</td>\n",
+       "      <td>0</td>\n",
        "      <td>0</td>\n",
        "      <td>0</td>\n",
        "      <td>0</td>\n",
@@ -4368,9 +4351,9 @@
        "      <td>NaN</td>\n",
        "      <td>363</td>\n",
        "      <td>10496</td>\n",
-       "      <td>6</td>\n",
        "      <td>0</td>\n",
        "      <td>0</td>\n",
+       "      <td>1</td>\n",
        "      <td>0</td>\n",
        "    </tr>\n",
        "  </tbody>\n",
@@ -4384,9 +4367,9 @@
        "2            4             3              NaN   NaN         NaN       363   \n",
        "\n",
        "  clauses enc.user enc.sys sat.user sat.sys  \n",
-       "0   77340       45       0        1       0  \n",
+       "0   77340        3       0        2       0  \n",
-       "1    3129        2       0        0       0  \n",
+       "1    3129        0       0        0       0  \n",
-       "2   10496        6       0        0       0  "
+       "2   10496        0       0        1       0  "
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@@ -4400,11 +4383,10 @@
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        " -->\n",
-       "<!-- Title: G Pages: 1 -->\n",
+       "<!-- Pages: 1 -->\n",
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        " viewBox=\"0.00 0.00 509.48 199.00\" 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(4 195)\">\n",
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        "<text text-anchor=\"start\" x=\"253.2401\" y=\"-176.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#1f78b4\">⓿</text>\n",
@@ -4531,7 +4513,7 @@
        "</svg>\n"
       ],
       "text/plain": [
-       "<spot.impl.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x14faae26a480> >"
+       "<spot.impl.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7feac8ba9630> >"
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      "execution_count": 21,
@@ -4602,9 +4584,9 @@
        "      <td>40</td>\n",
        "      <td>1869</td>\n",
        "      <td>135032</td>\n",
-       "      <td>80</td>\n",
+       "      <td>5</td>\n",
-       "      <td>1</td>\n",
+       "      <td>0</td>\n",
-       "      <td>2</td>\n",
+       "      <td>3</td>\n",
        "      <td>0</td>\n",
        "    </tr>\n",
        "  </tbody>\n",
@@ -4616,7 +4598,7 @@
        "0            2             7                5    14          40      1869   \n",
        "\n",
        "  clauses enc.user enc.sys sat.user sat.sys  \n",
-       "0  135032       80       1        2       0  "
+       "0  135032        5       0        3       0  "
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@@ -4630,11 +4612,10 @@
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        "<text text-anchor=\"start\" x=\"260.3701\" y=\"-284.6701\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#1f78b4\">⓿</text>\n",
@@ -4782,7 +4763,7 @@
        "</svg>\n"
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       "text/plain": [
-       "<spot.impl.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x14faae26a3f0> >"
+       "<spot.impl.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7feac8ba9660> >"
       ]
      },
      "execution_count": 22,

tests/python/testingaut.ipynb

@@ -31,55 +31,60 @@
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        "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\"\n",
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-       "<!-- Generated by graphviz version 2.38.0 (20140413.2041)\n",
+       "<!-- Generated by graphviz version 2.40.1 (20161225.0304)\n",
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        "<g id=\"graph0\" class=\"graph\" transform=\"scale(1 1) rotate(0) translate(4 120.8)\">\n",
-       "<title>G</title>\n",
+       "<polygon fill=\"#ffffff\" stroke=\"transparent\" points=\"-4,4 -4,-120.8 167,-120.8 167,4 -4,4\"/>\n",
-       "<polygon fill=\"white\" stroke=\"none\" points=\"-4,4 -4,-120.8 167,-120.8 167,4 -4,4\"/>\n",
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-       "<text text-anchor=\"start\" x=\"58.5\" y=\"-86.6\" font-family=\"Lato\" font-size=\"14.00\">[Büchi]</text>\n",
        "<!-- I -->\n",
        "<!-- 0 -->\n",
-       "<g id=\"node2\" class=\"node\"><title>0</title>\n",
+       "<g id=\"node2\" class=\"node\">\n",
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        "<!-- I&#45;&gt;0 -->\n",
-       "<g id=\"edge1\" class=\"edge\"><title>I&#45;&gt;0</title>\n",
+       "<g id=\"edge1\" class=\"edge\">\n",
-       "<path fill=\"none\" stroke=\"black\" d=\"M1.15491,-22C2.79388,-22 17.1543,-22 30.6317,-22\"/>\n",
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        "</g>\n",
        "<!-- 0&#45;&gt;0 -->\n",
-       "<g id=\"edge2\" class=\"edge\"><title>0&#45;&gt;0</title>\n",
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       "text/plain": [
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@@ -108,234 +113,271 @@
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        "<!-- 2 -->\n",
-       "<g class=\"node\" id=\"node3\"><title>2</title>\n",
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-       "<ellipse cx=\"540.969\" cy=\"-195\" fill=\"#ffffaa\" rx=\"37.4533\" ry=\"26.7407\" stroke=\"black\"/>\n",
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-       "<text font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"540.969\" y=\"-183.8\">!a &amp; b</text>\n",
+       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"540.9691\" y=\"-200.8\">0</text>\n",
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-       "<g class=\"edge\" id=\"edge2\"><title>1-&gt;2</title>\n",
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+       "<title>1-&gt;2</title>\n",
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        "<!-- 3 -->\n",
-       "<g class=\"node\" id=\"node4\"><title>3</title>\n",
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-       "<ellipse cx=\"250.355\" cy=\"-154\" fill=\"#ffffaa\" rx=\"35.2113\" ry=\"26.7407\" stroke=\"black\"/>\n",
+       "<title>3</title>\n",
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-       "<text font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"250.355\" y=\"-142.8\">a &amp; b</text>\n",
+       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"250.3553\" y=\"-159.8\">0</text>\n",
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        "<!-- 1&#45;&gt;3 -->\n",
-       "<g class=\"edge\" id=\"edge3\"><title>1-&gt;3</title>\n",
+       "<g class=\"edge\" id=\"edge3\">\n",
-       "<path d=\"M136.852,-236.853C157.767,-221.45 192.789,-195.658 218.211,-176.936\" fill=\"none\" stroke=\"black\"/>\n",
+       "<title>1-&gt;3</title>\n",
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+       "<path d=\"M136.4034,-238.6516C157.5778,-223.2935 192.7241,-197.8011 218.3948,-179.1816\" fill=\"none\" stroke=\"#000000\"/>\n",
-       "<text font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"180\" y=\"-220.8\">a &amp; b</text>\n",
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        "<!-- 4 -->\n",
-       "<g class=\"node\" id=\"node5\"><title>4</title>\n",
+       "<g class=\"node\" id=\"node5\">\n",
-       "<ellipse cx=\"396.187\" cy=\"-195\" fill=\"#ffffaa\" rx=\"37.4533\" ry=\"26.7407\" stroke=\"black\"/>\n",
+       "<title>4</title>\n",
-       "<text font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"396.187\" y=\"-198.8\">0</text>\n",
+       "<ellipse cx=\"396.1873\" cy=\"-197\" fill=\"#ffffaa\" rx=\"37.4533\" ry=\"26.7407\" stroke=\"#000000\"/>\n",
-       "<text font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"396.187\" y=\"-183.8\">a &amp; !b</text>\n",
+       "<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",
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        "<!-- 1&#45;&gt;4 -->\n",
-       "<g class=\"edge\" id=\"edge4\"><title>1-&gt;4</title>\n",
+       "<g class=\"edge\" id=\"edge4\">\n",
-       "<path d=\"M144.886,-246.934C186.554,-241.693 270.897,-229.822 340.711,-212 345.355,-210.815 350.189,-209.47 354.975,-208.069\" fill=\"none\" stroke=\"black\"/>\n",
+       "<title>1-&gt;4</title>\n",
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+       "<path d=\"M144.539,-248.3342C177.6921,-243.6154 236.1001,-234.8431 285.7107,-225 310.3484,-220.1117 316.3617,-218.1677 340.7107,-212 345.0267,-210.9067 349.5237,-209.7388 354.0075,-208.5555\" fill=\"none\" stroke=\"#000000\"/>\n",
-       "<text font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"250.355\" y=\"-240.8\">a &amp; !b</text>\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",
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        "<!-- 5 -->\n",
-       "<g class=\"node\" id=\"node6\"><title>5</title>\n",
+       "<g class=\"node\" id=\"node6\">\n",
-       "<ellipse cx=\"687.63\" cy=\"-147\" fill=\"#ffffaa\" rx=\"35.2259\" ry=\"26.7574\" stroke=\"black\"/>\n",
+       "<title>5</title>\n",
-       "<ellipse cx=\"687.63\" cy=\"-147\" fill=\"none\" rx=\"39.2112\" ry=\"30.7407\" stroke=\"black\"/>\n",
+       "<ellipse cx=\"687.6295\" cy=\"-147\" fill=\"#ffffaa\" rx=\"35.2259\" ry=\"26.7574\" stroke=\"#000000\"/>\n",
-       "<text font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"687.63\" y=\"-150.8\">1</text>\n",
+       "<ellipse cx=\"687.6295\" cy=\"-147\" fill=\"none\" rx=\"39.2112\" ry=\"30.7407\" stroke=\"#000000\"/>\n",
-       "<text font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"687.63\" y=\"-135.8\">a &amp; b</text>\n",
+       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"687.6295\" y=\"-150.8\">1</text>\n",
+       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"687.6295\" y=\"-135.8\">a &amp; b</text>\n",
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        "<!-- 2&#45;&gt;5 -->\n",
-       "<g class=\"edge\" id=\"edge5\"><title>2-&gt;5</title>\n",
+       "<g class=\"edge\" id=\"edge5\">\n",
-       "<path d=\"M575.157,-183.988C595.719,-177.165 622.32,-168.339 644.379,-161.019\" fill=\"none\" stroke=\"black\"/>\n",
+       "<title>2-&gt;5</title>\n",
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+       "<path d=\"M574.9846,-185.4033C595.7665,-178.3183 622.5296,-169.1941 644.7541,-161.6172\" fill=\"none\" stroke=\"#000000\"/>\n",
-       "<text font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"614.774\" y=\"-179.8\">{a}</text>\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",
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        "<!-- 6 -->\n",
-       "<g class=\"node\" id=\"node7\"><title>6</title>\n",
+       "<g class=\"node\" id=\"node7\">\n",
-       "<ellipse cx=\"835.462\" cy=\"-148\" fill=\"#ffffaa\" rx=\"37.4556\" ry=\"26.7574\" stroke=\"black\"/>\n",
+       "<title>6</title>\n",
-       "<ellipse cx=\"835.462\" cy=\"-148\" fill=\"none\" rx=\"41.4533\" ry=\"30.7407\" stroke=\"black\"/>\n",
+       "<ellipse cx=\"835.4615\" cy=\"-148\" fill=\"#ffffaa\" rx=\"37.4556\" ry=\"26.7574\" stroke=\"#000000\"/>\n",
-       "<text font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"835.462\" y=\"-151.8\">1</text>\n",
+       "<ellipse cx=\"835.4615\" cy=\"-148\" fill=\"none\" rx=\"41.4533\" ry=\"30.7407\" stroke=\"#000000\"/>\n",
-       "<text font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"835.462\" y=\"-136.8\">!a &amp; b</text>\n",
+       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"835.4615\" y=\"-151.8\">1</text>\n",
+       "<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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        "<!-- 2&#45;&gt;6 -->\n",
-       "<g class=\"edge\" id=\"edge6\"><title>2-&gt;6</title>\n",
+       "<g class=\"edge\" id=\"edge6\">\n",
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+       "<title>2-&gt;6</title>\n",
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        "<!-- 7 -->\n",
-       "<g class=\"node\" id=\"node8\"><title>7</title>\n",
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-       "<ellipse cx=\"988.243\" cy=\"-61\" fill=\"#ffffaa\" rx=\"37.4556\" ry=\"26.7574\" stroke=\"black\"/>\n",
+       "<title>7</title>\n",
-       "<ellipse cx=\"988.243\" cy=\"-61\" fill=\"none\" rx=\"41.4533\" ry=\"30.7407\" stroke=\"black\"/>\n",
+       "<ellipse cx=\"988.2433\" cy=\"-61\" fill=\"#ffffaa\" rx=\"37.4556\" ry=\"26.7574\" stroke=\"#000000\"/>\n",
-       "<text font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"988.243\" y=\"-64.8\">1</text>\n",
+       "<ellipse cx=\"988.2433\" cy=\"-61\" fill=\"none\" rx=\"41.4533\" ry=\"30.7407\" stroke=\"#000000\"/>\n",
-       "<text font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"988.243\" y=\"-49.8\">a &amp; !b</text>\n",
+       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"988.2433\" y=\"-64.8\">1</text>\n",
+       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"988.2433\" y=\"-49.8\">a &amp; !b</text>\n",
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-       "<g class=\"edge\" id=\"edge7\"><title>2-&gt;7</title>\n",
+       "<g class=\"edge\" id=\"edge7\">\n",
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+       "<title>2-&gt;7</title>\n",
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        "<!-- 8 -->\n",
-       "<g class=\"node\" id=\"node9\"><title>8</title>\n",
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+       "<title>8</title>\n",
-       "<ellipse cx=\"988.243\" cy=\"-269\" fill=\"none\" rx=\"44.111\" ry=\"30.7407\" stroke=\"black\"/>\n",
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-       "<text font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"988.243\" y=\"-272.8\">1</text>\n",
+       "<ellipse cx=\"988.2433\" cy=\"-269\" fill=\"none\" rx=\"44.111\" ry=\"30.7407\" stroke=\"#000000\"/>\n",
-       "<text font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"988.243\" y=\"-257.8\">!a &amp; !b</text>\n",
+       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"988.2433\" y=\"-272.8\">1</text>\n",
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-       "<g class=\"edge\" id=\"edge8\"><title>2-&gt;8</title>\n",
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-       "<g class=\"edge\" id=\"edge10\"><title>3-&gt;2</title>\n",
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        "<!-- 3&#45;&gt;3 -->\n",
-       "<g class=\"edge\" id=\"edge9\"><title>3-&gt;3</title>\n",
+       "<g class=\"edge\" id=\"edge9\">\n",
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-       "<g class=\"edge\" id=\"edge11\"><title>3-&gt;4</title>\n",
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-       "<g class=\"edge\" id=\"edge13\"><title>3-&gt;5</title>\n",
+       "<g class=\"edge\" id=\"edge13\">\n",
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-       "<g class=\"edge\" id=\"edge14\"><title>3-&gt;6</title>\n",
+       "<g class=\"edge\" id=\"edge14\">\n",
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+       "<title>3-&gt;6</title>\n",
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+       "<path d=\"M267.102,-132.0313C291.5104,-100.2136 340.1084,-48 396.1873,-48 396.1873,-48 396.1873,-48 614.7742,-48 685.7369,-48 759.0106,-91.4276 800.7319,-121.0456\" fill=\"none\" stroke=\"#000000\"/>\n",
-       "<text font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"540.969\" y=\"-92.8\">{a}</text>\n",
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+       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"540.9691\" y=\"-51.8\">{a}</text>\n",
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        "<!-- 3&#45;&gt;7 -->\n",
-       "<g class=\"edge\" id=\"edge15\"><title>3-&gt;7</title>\n",
+       "<g class=\"edge\" id=\"edge15\">\n",
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+       "<title>3-&gt;7</title>\n",
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+       "<path d=\"M260.5421,-129.8891C279.779,-85.4797 325.9314,0 396.1873,0 396.1873,0 396.1873,0 835.4615,0 877.1907,0 921.0539,-19.8698 951.0225,-36.9288\" fill=\"none\" stroke=\"#000000\"/>\n",
-       "<text font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"614.774\" y=\"-3.8\">{b}</text>\n",
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        "<!-- 3&#45;&gt;8 -->\n",
-       "<g class=\"edge\" id=\"edge16\"><title>3-&gt;8</title>\n",
+       "<g class=\"edge\" id=\"edge16\">\n",
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+       "<title>3-&gt;8</title>\n",
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        "</g>\n",
        "<!-- 9 -->\n",
-       "<g class=\"node\" id=\"node10\"><title>9</title>\n",
+       "<g class=\"node\" id=\"node10\">\n",
-       "<ellipse cx=\"540.969\" cy=\"-273\" fill=\"#ffffaa\" rx=\"40.1111\" ry=\"26.7407\" stroke=\"black\"/>\n",
+       "<title>9</title>\n",
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-       "<text font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"540.969\" y=\"-261.8\">!a &amp; !b</text>\n",
+       "<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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        "<!-- 3&#45;&gt;9 -->\n",
-       "<g class=\"edge\" id=\"edge12\"><title>3-&gt;9</title>\n",
+       "<g class=\"edge\" id=\"edge12\">\n",
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+       "<title>3-&gt;9</title>\n",
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        "<!-- 4&#45;&gt;2 -->\n",
-       "<g class=\"edge\" id=\"edge18\"><title>4-&gt;2</title>\n",
+       "<g class=\"edge\" id=\"edge18\">\n",
-       "<path d=\"M433.957,-195C452.943,-195 476.24,-195 496.154,-195\" fill=\"none\" stroke=\"black\"/>\n",
+       "<title>4-&gt;2</title>\n",
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        "<!-- 4&#45;&gt;3 -->\n",
-       "<g class=\"edge\" id=\"edge17\"><title>4-&gt;3</title>\n",
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+       "<title>4-&gt;3</title>\n",
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-       "<g class=\"edge\" id=\"edge19\"><title>4-&gt;4</title>\n",
+       "<g class=\"edge\" id=\"edge19\">\n",
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-       "<g class=\"edge\" id=\"edge20\"><title>4-&gt;9</title>\n",
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+       "<title>4-&gt;9</title>\n",
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-       "<g class=\"edge\" id=\"edge21\"><title>5-&gt;5</title>\n",
+       "<g class=\"edge\" id=\"edge21\">\n",
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+       "<title>5-&gt;5</title>\n",
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-       "<g class=\"edge\" id=\"edge22\"><title>5-&gt;6</title>\n",
+       "<g class=\"edge\" id=\"edge22\">\n",
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-       "<text font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"563.953\" y=\"-108.8\">{a}</text>\n",
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-       "<g class=\"edge\" id=\"edge6\"><title>3-&gt;2</title>\n",
+       "<g class=\"edge\" id=\"edge6\">\n",
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-       "<g class=\"edge\" id=\"edge7\"><title>3-&gt;4</title>\n",
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-       "<text font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"305.5\" y=\"-45.8\">{b}</text>\n",
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-       "<g class=\"node\" id=\"node7\"><title>6</title>\n",
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+       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"734.9533\" y=\"-48.8\">1</text>\n",
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-       "<g class=\"edge\" id=\"edge8\"><title>3-&gt;6</title>\n",
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-       "<text font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"510.953\" y=\"-3.8\">{a}</text>\n",
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-       "<g class=\"edge\" id=\"edge10\"><title>4-&gt;2</title>\n",
+       "<g class=\"edge\" id=\"edge10\">\n",
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-       "<g class=\"edge\" id=\"edge9\"><title>4-&gt;3</title>\n",
+       "<g class=\"edge\" id=\"edge9\">\n",
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-       "<g class=\"edge\" id=\"edge11\"><title>5-&gt;6</title>\n",
+       "<g class=\"edge\" id=\"edge11\">\n",
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-       "<g class=\"edge\" id=\"edge12\"><title>6-&gt;5</title>\n",
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+       "<title>1-&gt;4</title>\n",
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-       "<text font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"242\" y=\"-137.8\">a &amp; !b</text>\n",
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+       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"242\" y=\"-146.8\">a &amp; !b</text>\n",
        "</g>\n",
        "<!-- 5 -->\n",
-       "<g class=\"node\" id=\"node6\"><title>5</title>\n",
+       "<g class=\"node\" id=\"node6\">\n",
-       "<polygon fill=\"#ffffaa\" points=\"627,-40 573,-40 573,-4 627,-4 627,-40\" stroke=\"black\"/>\n",
+       "<title>5</title>\n",
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-       "<text font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"600\" y=\"-18.3\">4</text>\n",
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+       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"600\" y=\"-18.3\">4</text>\n",
        "</g>\n",
        "<!-- 2&#45;&gt;5 -->\n",
-       "<g class=\"edge\" id=\"edge5\"><title>2-&gt;5</title>\n",
+       "<g class=\"edge\" id=\"edge5\">\n",
-       "<path d=\"M517.144,-55.3488C530.678,-49.8349 547.427,-43.0113 562.241,-36.9757\" fill=\"none\" stroke=\"black\"/>\n",
+       "<title>2-&gt;5</title>\n",
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+       "<path d=\"M517.191,-70.9326C530.8855,-62.8404 547.7015,-52.9037 562.5938,-44.1036\" fill=\"none\" stroke=\"#000000\"/>\n",
-       "<text font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"543\" y=\"-51.8\">{a}</text>\n",
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        "</g>\n",
        "<!-- 3&#45;&gt;2 -->\n",
-       "<g class=\"edge\" id=\"edge6\"><title>3-&gt;2</title>\n",
+       "<g class=\"edge\" id=\"edge6\">\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>\n",
        "<!-- 3&#45;&gt;4 -->\n",
-       "<g class=\"edge\" id=\"edge7\"><title>3-&gt;4</title>\n",
+       "<g class=\"edge\" id=\"edge7\">\n",
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+       "<path d=\"M269.1286,-81.7143C285.3671,-80.6302 306.2351,-80.807 324,-86 331.5733,-88.2138 339.122,-92.0861 345.8129,-96.2575\" fill=\"none\" stroke=\"#000000\"/>\n",
-       "<text font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"305.5\" y=\"-80.8\">{b}</text>\n",
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        "</g>\n",
        "<!-- 3&#45;&gt;5 -->\n",
-       "<g class=\"edge\" id=\"edge8\"><title>3-&gt;5</title>\n",
+       "<g class=\"edge\" id=\"edge8\">\n",
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-       "<text font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"429.5\" y=\"-41.8\">{a}</text>\n",
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        "</g>\n",
        "<!-- 4&#45;&gt;2 -->\n",
-       "<g class=\"edge\" id=\"edge10\"><title>4-&gt;2</title>\n",
+       "<g class=\"edge\" id=\"edge10\">\n",
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-       "<text font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"429.5\" y=\"-92.8\">{a, b}</text>\n",
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-       "<g class=\"edge\" id=\"edge9\"><title>4-&gt;3</title>\n",
+       "<g class=\"edge\" id=\"edge9\">\n",
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+       "<title>4-&gt;3</title>\n",
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        "</g>\n",
        "<!-- 5&#45;&gt;5 -->\n",
-       "<g class=\"edge\" id=\"edge11\"><title>5-&gt;5</title>\n",
+       "<g class=\"edge\" id=\"edge11\">\n",
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+       "<title>5-&gt;5</title>\n",
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-       "<text font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"600\" y=\"-65.8\">{a}</text>\n",
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@@ -644,7 +720,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.6.4+"
+   "version": "3.6.5"
   }
  },
  "nbformat": 4,

tests/python/word.ipynb

@@ -28,128 +28,145 @@
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+       "<!-- Generated by graphviz version 2.40.1 (20161225.0304)\n",
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-       "<!-- Title: G Pages: 1 -->\n",
+       "<!-- Pages: 1 -->\n",
-       "<svg width=\"465pt\" height=\"202pt\"\n",
+       "<svg width=\"465pt\" height=\"232pt\"\n",
-       " viewBox=\"0.00 0.00 464.50 202.00\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\">\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(4 198)\">\n",
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       ],
       "text/plain": [
-       "<spot.impl.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7fbc902577b0> >"
+       "<spot.impl.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7fca7775f690> >"
       ]
      },
      "execution_count": 13,
@@ -554,7 +579,7 @@
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