From 8df5f5137e618973034bf5fde0e903fde4e440cf Mon Sep 17 00:00:00 2001
From: Alexandre Duret-Lutz <adl@lrde.epita.fr>
Date: Tue, 18 Jun 2019 10:06:56 +0200
Subject: [PATCH] gfguarantee: fix #357 again

The previous patch triggered this issue again, failing
core/ltl2tgba2.test.

* spot/twaalgos/gfguarantee.cc: Separate the replaying of history from
the modification of the automaton.
* NEWS: Mention the bug.
* tests/python/twagraph-internals.ipynb, tests/python/automata.ipynb:
Adjust.
---
 NEWS                                  |    6 +
 spot/twaalgos/gfguarantee.cc          |  207 +-
 tests/python/automata.ipynb           |  417 ++-
 tests/python/twagraph-internals.ipynb | 4142 ++++++++++++-------------
 4 files changed, 2379 insertions(+), 2393 deletions(-)

diff --git a/NEWS b/NEWS
index 6a6990aed..3cbbe0331 100644
--- a/NEWS
+++ b/NEWS
@@ -132,6 +132,12 @@ New in spot 2.7.5.dev (not yet released)
     properties.  This can be altered with the SPOT_PR_CHECK
     environment variable.
 
+  Bugs fixed:
+
+  - The gf_guarantee_to_ba() is relying on an inplace algorithm that
+    could produce a different number of edges for the same input in
+    two different transition order.
+
 New in spot 2.7.5 (2019-06-05)
 
   Build:
diff --git a/spot/twaalgos/gfguarantee.cc b/spot/twaalgos/gfguarantee.cc
index aa26fb88b..85738ab2c 100644
--- a/spot/twaalgos/gfguarantee.cc
+++ b/spot/twaalgos/gfguarantee.cc
@@ -185,13 +185,92 @@ namespace spot
               //   }
             }
 
-          unsigned nedges = aut->num_edges();
           unsigned new_init = -1U;
-          // The loop might add new edges, but we just want to iterate
-          // on the initial ones.
-          for (unsigned edge = 1; edge <= nedges; ++edge)
+          // We do two the rewrite in two passes.  The first one
+          // replays histories to detect the new source the edges
+          // should synchronize with. We used to have single
+          // loop, but replaying history on edges that have been modified
+          // result in different automaton depending on the edge order.
+          std::vector<unsigned> redirect_src;
+          if (is_det)
+            {
+              redirect_src.resize(aut->edge_vector().size());
+              for (auto& e: aut->edges())
+                {
+                  unsigned edge = aut->edge_number(e);
+                  redirect_src[edge] = e.src; // no change by default
+                  // Don't bother with terminal states, they won't be
+                  // reachable anymore.
+                  if (term[si.scc_of(e.src)])
+                    continue;
+                  // It will not loop
+                  if (!term[si.scc_of(e.dst)])
+                    continue;
+                  // It will loop.
+
+                  // If initial state cannot be reached from another
+                  // state of the automaton, we can get rid of it by
+                  // combining the edge reaching the terminal state
+                  // with the edges leaving the initial state.
+                  //
+                  // However if we have some histories for e.src
+                  // (which implies that the automaton is
+                  // deterministic), we can try to replay that from
+                  // the initial state first.
+                  //
+                  // One problem with those histories, is that we do
+                  // not know how much of it to replay.  It's possible
+                  // that we cannot find a matching transition (e.g. if
+                  // the history if "b" but the choices are "!a" or "a"),
+                  // and its also possible to that playing too much of
+                  // history will get us back the terminal state.  In both
+                  // cases, we should try again with a smaller history.
+                  unsigned moved_init = init;
+                  bdd econd = e.cond;
+
+                  auto& h = histories[e.src];
+                  int hsize = h.size();
+                  for (int hlen = hsize - 1; hlen >= 0; --hlen)
+                    {
+                      for (int pos = hlen - 1; pos >= 0; --pos)
+                        {
+                          for (auto& e: aut->out(moved_init))
+                            if (bdd_implies(h[pos], e.cond))
+                              {
+                                if (term[si.scc_of(e.dst)])
+                                  goto failed;
+                                moved_init = e.dst;
+                                goto moved;
+                              }
+                          // if we reach this place, we failed to follow
+                          // one step of the history.
+                          goto failed;
+                        moved:
+                          continue;
+                        }
+
+                      // Make sure no successor of the new initial
+                      // state will reach a terminal state; if
+                      // that is the case, we have to shorten the
+                      // history further.
+                      if (hlen > 0)
+                        for (auto& ei: aut->out(moved_init))
+                          if ((ei.cond & econd) != bddfalse
+                              && term[si.scc_of(ei.dst)])
+                            goto failed;
+
+                      redirect_src[edge] = moved_init;
+                      break;
+                    failed:
+                      moved_init = init;
+                      continue;
+                    }
+                }
+            }
+
+          // No we do the redirection.
+          for (auto& e: aut->edges())
             {
-              auto& e = aut->edge_storage(edge);
               // Don't bother with terminal states, they won't be
               // reachable anymore.
               if (term[si.scc_of(e.src)])
@@ -235,95 +314,55 @@ namespace spot
                   bool first;
                   if (is_det)
                     {
-                      auto& h = histories[e.src];
-                      int hsize = h.size();
-                      for (int hlen = hsize - 1; hlen >= 0; --hlen)
+                      unsigned edge = aut->edge_number(e);
+                      moved_init = redirect_src[edge];
+
+                      first = true;
+                      for (auto& ei: aut->out(moved_init))
                         {
-                          for (int pos = hlen - 1; pos >= 0; --pos)
+                          bdd cond = ei.cond & econd;
+                          if (cond != bddfalse)
                             {
-                              for (auto& e: aut->out(moved_init))
-                                if (bdd_implies(h[pos], e.cond))
-                                  {
-                                    if (term[si.scc_of(e.dst)])
-                                      goto failed;
-                                    moved_init = e.dst;
-                                    goto moved;
-                                  }
-                              // if we reach this place, we failed to follow
-                              // one step of the history.
-                              goto failed;
-                            moved:
-                              continue;
-                            }
-
-                          // Make sure no successor of the new initial
-                          // state will reach a terminal state; if
-                          // that is the case, we have to shorten the
-                          // history further.
-                          if (hlen > 0)
-                            for (auto& ei: aut->out(moved_init))
-                              if ((ei.cond & econd) != bddfalse
-                                  && term[si.scc_of(ei.dst)])
-                                goto failed;
-
-                          // we have successfully played all history
-                          // to a non-terminal state.
-                          //
-                          // Combine this edge with any compatible
-                          // edge from the initial state.
-                          first = true;
-                          for (auto& ei: aut->out(moved_init))
-                            {
-                              bdd cond = ei.cond & econd;
-                              if (cond != bddfalse)
+                              // We should never reach the terminal state,
+                              // unless the history is empty.  In that
+                              // case (ts=true) we have to make a loop to
+                              // the initial state without any
+                              // combination.
+                              bool ts = term[si.scc_of(ei.dst)];
+                              if (ts)
                                 {
-                                  // We should never reach the terminal state,
-                                  // unless the history is empty.  In that
-                                  // case (ts=true) we have to make a loop to
-                                  // the initial state without any
-                                  // combination.
-                                  bool ts = term[si.scc_of(ei.dst)];
-                                  if (ts)
+                                  want_merge_edges = true;
+                                }
+                              if (first)
+                                {
+                                  e.acc = {0};
+                                  e.cond = cond;
+                                  first = false;
+                                  if (!ts)
                                     {
-                                      assert(hlen == 0);
-                                      want_merge_edges = true;
-                                    }
-                                  if (first)
-                                    {
-                                      e.acc = {0};
-                                      e.cond = cond;
-                                      first = false;
-                                      if (!ts)
-                                        {
-                                          e.dst = ei.dst;
-                                          if (new_init == -1U)
-                                            new_init = e.src;
-                                        }
-                                      else
-                                        {
-                                          new_init = e.dst = init;
-                                        }
+                                      e.dst = ei.dst;
+                                      if (new_init == -1U)
+                                        new_init = e.src;
                                     }
                                   else
                                     {
-                                      if (ts)
-                                        {
-                                          aut->new_edge(e.src, init, cond, {0});
-                                          new_init = init;
-                                        }
-                                      else
-                                        {
-                                          aut->new_edge(e.src, ei.dst,
-                                                        cond, {0});
-                                        }
+                                      new_init = e.dst = init;
+                                    }
+                                }
+                              else
+                                {
+                                  if (ts)
+                                    {
+                                      aut->new_edge(e.src, init, cond, {0});
+                                      new_init = init;
+                                    }
+                                  else
+                                    {
+                                      aut->new_edge(e.src, ei.dst,
+                                                    cond, {0});
                                     }
-
                                 }
                             }
-                          break;
-                        failed:
-                          moved_init = init;
-                          continue;
                         }
                     }
                   else
diff --git a/tests/python/automata.ipynb b/tests/python/automata.ipynb
index ac2718107..0b24a89bc 100644
--- a/tests/python/automata.ipynb
+++ b/tests/python/automata.ipynb
@@ -178,7 +178,7 @@
        "</svg>\n"
       ],
       "text/plain": [
-       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f5a6034a960> >"
+       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7fb70857f7e0> >"
       ]
      },
      "execution_count": 2,
@@ -643,7 +643,7 @@
        "</svg>\n"
       ],
       "text/plain": [
-       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f5a60301210> >"
+       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7fb708536540> >"
       ]
      },
      "execution_count": 6,
@@ -719,7 +719,7 @@
        "</svg>\n"
       ],
       "text/plain": [
-       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f5a60301bd0> >"
+       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7fb708536c90> >"
       ]
      },
      "execution_count": 7,
@@ -802,7 +802,7 @@
        "</svg>\n"
       ],
       "text/plain": [
-       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f5a60301690> >"
+       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7fb7085369f0> >"
       ]
      },
      "execution_count": 8,
@@ -1321,7 +1321,7 @@
        "</svg>\n"
       ],
       "text/plain": [
-       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f5a603010c0> >"
+       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7fb708536a20> >"
       ]
      },
      "execution_count": 12,
@@ -1435,7 +1435,7 @@
        "</svg>\n"
       ],
       "text/plain": [
-       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f5a60301090> >"
+       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7fb7085362a0> >"
       ]
      },
      "execution_count": 13,
@@ -1566,7 +1566,7 @@
        "</svg>\n"
       ],
       "text/plain": [
-       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f5a60301c90> >"
+       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7fb70857f8a0> >"
       ]
      },
      "execution_count": 14,
@@ -1785,7 +1785,7 @@
        "</svg>\n"
       ],
       "text/plain": [
-       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f5a6030f4b0> >"
+       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7fb708544600> >"
       ]
      },
      "metadata": {},
@@ -1935,7 +1935,7 @@
        "</svg>\n"
       ],
       "text/plain": [
-       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f5a60392630> >"
+       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7fb708544390> >"
       ]
      },
      "metadata": {},
@@ -2107,7 +2107,7 @@
        "</svg>\n"
       ],
       "text/plain": [
-       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f5a6030f930> >"
+       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7fb708544900> >"
       ]
      },
      "metadata": {},
@@ -2282,7 +2282,7 @@
        "</svg>\n"
       ],
       "text/plain": [
-       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f5a6030f870> >"
+       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7fb7085449c0> >"
       ]
      },
      "metadata": {},
@@ -2468,7 +2468,7 @@
        "</svg>\n"
       ],
       "text/plain": [
-       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f5a6030fbd0> >"
+       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7fb708544b10> >"
       ]
      },
      "execution_count": 19,
@@ -2544,7 +2544,7 @@
        "</svg>\n"
       ],
       "text/plain": [
-       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f5a6030f150> >"
+       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7fb708544c00> >"
       ]
      },
      "execution_count": 20,
@@ -2616,7 +2616,7 @@
        "<title>0-&gt;0</title>\n",
        "<path d=\"M49.6208,-37.4339C48.3189,-47.2545 50.4453,-56.3966 56,-56.3966 60.166,-56.3966 62.4036,-51.2542 62.7128,-44.5399\" fill=\"none\" stroke=\"#000000\"/>\n",
        "<polygon fill=\"#000000\" points=\"62.3792,-37.4339 65.8541,-44.2785 62.5434,-40.9301 62.7076,-44.4262 62.7076,-44.4262 62.7076,-44.4262 62.5434,-40.9301 59.561,-44.574 62.3792,-37.4339 62.3792,-37.4339\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"50.5\" y=\"-75.1966\">!a</text>\n",
+       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"52.5\" y=\"-75.1966\">a</text>\n",
        "<text fill=\"#1f78b4\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"48\" y=\"-60.1966\">⓿</text>\n",
        "</g>\n",
        "<!-- 1 -->\n",
@@ -2630,21 +2630,21 @@
        "<title>0-&gt;1</title>\n",
        "<path d=\"M74.0098,-20.3966C85.5679,-20.3966 100.7507,-20.3966 113.5345,-20.3966\" fill=\"none\" stroke=\"#000000\"/>\n",
        "<polygon fill=\"#000000\" points=\"120.7388,-20.3966 113.7388,-23.5467 117.2388,-20.3967 113.7388,-20.3967 113.7388,-20.3967 113.7388,-20.3967 117.2388,-20.3967 113.7387,-17.2467 120.7388,-20.3966 120.7388,-20.3966\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"94\" y=\"-24.1966\">a</text>\n",
+       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"92\" y=\"-24.1966\">!a</text>\n",
        "</g>\n",
        "<!-- 1&#45;&gt;0 -->\n",
        "<g class=\"edge\" id=\"edge4\">\n",
        "<title>1-&gt;0</title>\n",
        "<path d=\"M124.5385,-9.3757C115.4203,-3.7422 103.2768,1.3966 92,-1.3966 87.1146,-2.6067 82.1612,-4.614 77.5558,-6.8813\" fill=\"none\" stroke=\"#000000\"/>\n",
        "<polygon fill=\"#000000\" points=\"71.1057,-10.3266 75.7959,-4.25 74.1929,-8.6776 77.2801,-7.0285 77.2801,-7.0285 77.2801,-7.0285 74.1929,-8.6776 78.7642,-9.807 71.1057,-10.3266 71.1057,-10.3266\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"92\" y=\"-5.1966\">!a</text>\n",
+       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"94\" y=\"-5.1966\">a</text>\n",
        "</g>\n",
        "<!-- 1&#45;&gt;1 -->\n",
        "<g class=\"edge\" id=\"edge5\">\n",
        "<title>1-&gt;1</title>\n",
        "<path d=\"M131.9688,-37.0607C130.4063,-47.0216 132.75,-56.3966 139,-56.3966 143.6875,-56.3966 146.1777,-51.1232 146.4707,-44.2842\" fill=\"none\" stroke=\"#000000\"/>\n",
        "<polygon fill=\"#000000\" points=\"146.0313,-37.0607 149.6006,-43.8564 146.2438,-40.5542 146.4564,-44.0478 146.4564,-44.0478 146.4564,-44.0478 146.2438,-40.5542 143.3122,-44.2391 146.0313,-37.0607 146.0313,-37.0607\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"135.5\" y=\"-75.1966\">a</text>\n",
+       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"133.5\" y=\"-75.1966\">!a</text>\n",
        "<text fill=\"#1f78b4\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"131\" y=\"-60.1966\">⓿</text>\n",
        "</g>\n",
        "</g>\n",
@@ -2716,316 +2716,257 @@
     {
      "data": {
       "text/html": [
-       "<div style='vertical-align:text-top;display:inline-block;width:50%;'><svg height=\"279pt\" viewBox=\"0.00 0.00 484.00 279.06\" width=\"484pt\" 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(4 275.0638)\">\n",
-       "<polygon fill=\"#ffffff\" points=\"-4,4 -4,-275.0638 480,-275.0638 480,4 -4,4\" stroke=\"transparent\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"191\" y=\"-256.8638\">Inf(</text>\n",
-       "<text fill=\"#1f78b4\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"213\" y=\"-256.8638\">⓿</text>\n",
-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"229\" y=\"-256.8638\">)&amp;Inf(</text>\n",
-       "<text fill=\"#ff4da0\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"265\" y=\"-256.8638\">❶</text>\n",
-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"281\" y=\"-256.8638\">)</text>\n",
-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"194\" y=\"-242.8638\">[gen. Büchi 2]</text>\n",
+       "<div style='vertical-align:text-top;display:inline-block;width:50%;'><svg height=\"244pt\" viewBox=\"0.00 0.00 354.00 244.00\" width=\"354pt\" 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(4 240)\">\n",
+       "<polygon fill=\"#ffffff\" points=\"-4,4 -4,-240 350,-240 350,4 -4,4\" stroke=\"transparent\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"126\" y=\"-221.8\">Inf(</text>\n",
+       "<text fill=\"#1f78b4\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"148\" y=\"-221.8\">⓿</text>\n",
+       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"164\" y=\"-221.8\">)&amp;Inf(</text>\n",
+       "<text fill=\"#ff4da0\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"200\" y=\"-221.8\">❶</text>\n",
+       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"216\" y=\"-221.8\">)</text>\n",
+       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"129\" y=\"-207.8\">[gen. Büchi 2]</text>\n",
        "<!-- I -->\n",
        "<!-- 0 -->\n",
        "<g class=\"node\" id=\"node2\">\n",
        "<title>0</title>\n",
-       "<ellipse cx=\"65\" cy=\"-29.0638\" fill=\"#ffffaa\" rx=\"27\" ry=\"18\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"55\" y=\"-25.3638\">0,0</text>\n",
+       "<ellipse cx=\"65\" cy=\"-18\" fill=\"#ffffaa\" rx=\"27\" ry=\"18\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"55\" y=\"-14.3\">0,0</text>\n",
        "</g>\n",
        "<!-- I&#45;&gt;0 -->\n",
        "<g class=\"edge\" id=\"edge1\">\n",
        "<title>I-&gt;0</title>\n",
-       "<path d=\"M1.2244,-29.0638C4.383,-29.0638 17.3969,-29.0638 30.8528,-29.0638\" fill=\"none\" stroke=\"#000000\"/>\n",
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+       "</g>\n",
+       "<!-- 0&#45;&gt;0 -->\n",
+       "<g class=\"edge\" id=\"edge2\">\n",
+       "<title>0-&gt;0</title>\n",
+       "<path d=\"M57.1448,-35.4099C55.6785,-45.0879 58.2969,-54 65,-54 69.9226,-54 72.6423,-49.1936 73.1591,-42.8073\" fill=\"none\" stroke=\"#000000\"/>\n",
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+       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"46.5\" y=\"-72.8\">a &amp; !b</text>\n",
+       "<text fill=\"#1f78b4\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"57\" y=\"-57.8\">⓿</text>\n",
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+       "<path d=\"M85.7548,-29.7164C106.6774,-41.5276 139.0687,-59.813 161.9831,-72.7485\" fill=\"none\" stroke=\"#000000\"/>\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"182\" y=\"-25.3638\">1,0</text>\n",
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-       "<title>0-&gt;2</title>\n",
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-       "<title>3</title>\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"238.5\" y=\"-9.8638\">a &amp; b</text>\n",
+       "<title>0-&gt;2</title>\n",
+       "<path d=\"M92.0179,-15.3093C133.4782,-12.3841 214.2574,-11.5218 274,-41 285.4096,-46.6297 295.4898,-56.4027 303.202,-65.5838\" fill=\"none\" stroke=\"#000000\"/>\n",
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        "<title>1-&gt;1</title>\n",
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        "<title>1-&gt;1</title>\n",
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+       "<path d=\"M180.4657,-105.249C174.4091,-126.4346 177.2539,-154 189,-154 199.5072,-154 202.8918,-131.9425 199.1536,-112.1253\" fill=\"none\" stroke=\"#000000\"/>\n",
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+       "<title>1-&gt;2</title>\n",
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-       "<!-- 1&#45;&gt;3 -->\n",
+       "<!-- 1&#45;&gt;2 -->\n",
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+       "<title>1-&gt;2</title>\n",
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+       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"236\" y=\"-124.8\">!a &amp; c</text>\n",
+       "<text fill=\"#ff4da0\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"246\" y=\"-109.8\">❶</text>\n",
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+       "<!-- 2&#45;&gt;1 -->\n",
+       "<g class=\"edge\" id=\"edge10\">\n",
+       "<title>2-&gt;1</title>\n",
+       "<path d=\"M305.3336,-71.9784C297.1903,-63.7001 286.1001,-54.4255 274,-50 257.3039,-43.8935 250.6961,-43.8935 234,-50 224.3577,-53.5266 215.3568,-60.1324 207.9773,-66.8595\" fill=\"none\" stroke=\"#000000\"/>\n",
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-       "<title>2-&gt;2</title>\n",
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-       "<title>2-&gt;3</title>\n",
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+       "<title>2-&gt;2</title>\n",
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+       "<text fill=\"#1f78b4\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"311\" y=\"-127.8\">⓿</text>\n",
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-       "<!-- 3&#45;&gt;1 -->\n",
+       "<!-- 2&#45;&gt;2 -->\n",
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-       "<title>3-&gt;1</title>\n",
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-       "<title>3-&gt;1</title>\n",
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-       "<title>3-&gt;3</title>\n",
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-       "<title>3-&gt;3</title>\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"433\" y=\"-171.8638\">a &amp; c</text>\n",
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-       "<text fill=\"#ff4da0\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"449\" y=\"-157.8638\">❶</text>\n",
+       "<title>2-&gt;2</title>\n",
+       "<path d=\"M310.1904,-105.249C303.9385,-126.4346 306.875,-154 319,-154 329.8462,-154 333.3399,-131.9425 329.4811,-112.1253\" fill=\"none\" stroke=\"#000000\"/>\n",
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+       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"301\" y=\"-171.8\">!a &amp; c</text>\n",
+       "<text fill=\"#1f78b4\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"303\" y=\"-157.8\">⓿</text>\n",
+       "<text fill=\"#ff4da0\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"319\" y=\"-157.8\">❶</text>\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"155.5\" y=\"-256.2783\">Inf(</text>\n",
-       "<text fill=\"#1f78b4\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"177.5\" y=\"-256.2783\">⓿</text>\n",
-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"193.5\" y=\"-256.2783\">)&amp;Inf(</text>\n",
-       "<text fill=\"#ff4da0\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"229.5\" y=\"-256.2783\">❶</text>\n",
-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"245.5\" y=\"-256.2783\">)</text>\n",
-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"158.5\" y=\"-242.2783\">[gen. Büchi 2]</text>\n",
+       "</svg></div><div style='vertical-align:text-top;display:inline-block;width:50%;'><svg height=\"244pt\" viewBox=\"0.00 0.00 303.00 244.00\" width=\"303pt\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\">\n",
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+       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"100.5\" y=\"-221.8\">Inf(</text>\n",
+       "<text fill=\"#1f78b4\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"122.5\" y=\"-221.8\">⓿</text>\n",
+       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"138.5\" y=\"-221.8\">)&amp;Inf(</text>\n",
+       "<text fill=\"#ff4da0\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"174.5\" y=\"-221.8\">❶</text>\n",
+       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"190.5\" y=\"-221.8\">)</text>\n",
+       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"103.5\" y=\"-207.8\">[gen. Büchi 2]</text>\n",
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        "<title>0</title>\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"56\" y=\"-24.7783\">0</text>\n",
+       "<ellipse cx=\"56\" cy=\"-18\" fill=\"#ffffaa\" rx=\"18\" ry=\"18\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"56\" y=\"-14.3\">0</text>\n",
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        "<!-- I&#45;&gt;0 -->\n",
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        "<title>I-&gt;0</title>\n",
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+       "</g>\n",
+       "<!-- 0&#45;&gt;0 -->\n",
+       "<g class=\"edge\" id=\"edge2\">\n",
+       "<title>0-&gt;0</title>\n",
+       "<path d=\"M49.6208,-35.0373C48.3189,-44.8579 50.4453,-54 56,-54 60.166,-54 62.4036,-48.8576 62.7128,-42.1433\" fill=\"none\" stroke=\"#000000\"/>\n",
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+       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"37.5\" y=\"-72.8\">a &amp; !b</text>\n",
+       "<text fill=\"#1f78b4\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"48\" y=\"-57.8\">⓿</text>\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"275\" y=\"-118.7783\">1</text>\n",
+       "<ellipse cx=\"162.5\" cy=\"-88\" fill=\"#ffffaa\" rx=\"18\" ry=\"18\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"162.5\" y=\"-84.3\">1</text>\n",
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        "</g>\n",
        "</g>\n",
        "<!-- 0&#45;&gt;1 -->\n",
-       "<g class=\"edge\" id=\"edge2\">\n",
+       "<g class=\"edge\" id=\"edge3\">\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"147\" y=\"-133.2783\">!a &amp; b</text>\n",
-       "<text fill=\"#1f78b4\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"157.5\" y=\"-118.2783\">⓿</text>\n",
+       "<path d=\"M71.2589,-28.0293C89.6065,-40.0888 120.5099,-60.4009 141.2011,-74.0007\" fill=\"none\" stroke=\"#000000\"/>\n",
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+       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"92\" y=\"-81.8\">a &amp; b</text>\n",
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+       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"middle\" x=\"275\" y=\"-84.3\">2</text>\n",
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-       "<title>0-&gt;2</title>\n",
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-       "<title>0-&gt;3</title>\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"203.5\" y=\"-8.2783\">a &amp; b</text>\n",
+       "<title>0-&gt;2</title>\n",
+       "<path d=\"M74.0755,-15.7322C108.6608,-12.3006 185.511,-9.1273 239,-40 249.2129,-45.8947 257.433,-55.9621 263.4257,-65.3591\" fill=\"none\" stroke=\"#000000\"/>\n",
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-       "<!-- 1&#45;&gt;3 -->\n",
+       "<!-- 1&#45;&gt;2 -->\n",
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-       "<title>1-&gt;3</title>\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"315\" y=\"-153.2783\">a &amp; c</text>\n",
-       "<text fill=\"#ff4da0\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"323\" y=\"-138.2783\">❶</text>\n",
+       "<title>1-&gt;2</title>\n",
+       "<path d=\"M178.3742,-96.6628C184.6129,-99.6068 191.9573,-102.5242 199,-104 216.3998,-107.6462 221.6095,-107.6905 239,-104 243.4784,-103.0496 248.0762,-101.5023 252.4246,-99.7353\" fill=\"none\" stroke=\"#000000\"/>\n",
+       "<polygon fill=\"#000000\" points=\"258.9997,-96.8317 253.8688,-102.5411 255.798,-98.2456 252.5963,-99.6595 252.5963,-99.6595 252.5963,-99.6595 255.798,-98.2456 251.3238,-96.778 258.9997,-96.8317 258.9997,-96.8317\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"201\" y=\"-124.8\">!a &amp; c</text>\n",
+       "<text fill=\"#ff4da0\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"211\" y=\"-109.8\">❶</text>\n",
        "</g>\n",
        "<!-- 2&#45;&gt;1 -->\n",
        "<g class=\"edge\" id=\"edge9\">\n",
        "<title>2-&gt;1</title>\n",
-       "<path d=\"M179.3683,-40.3835C198.7033,-56.9816 233.8422,-87.1465 255.7182,-105.9259\" fill=\"none\" stroke=\"#000000\"/>\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"202\" y=\"-92.2783\">!a &amp; b</text>\n",
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+       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"201\" y=\"-88.8\">a &amp; !c</text>\n",
+       "</g>\n",
+       "<!-- 2&#45;&gt;1 -->\n",
+       "<g class=\"edge\" id=\"edge10\">\n",
+       "<title>2-&gt;1</title>\n",
+       "<path d=\"M265.0142,-72.4472C258.6857,-64.0962 249.6857,-54.5962 239,-50 222.6689,-42.9755 215.3552,-43.0318 199,-50 190.4529,-53.6415 182.9427,-60.3746 176.9919,-67.1731\" fill=\"none\" stroke=\"#000000\"/>\n",
+       "<polygon fill=\"#000000\" points=\"172.3715,-72.8328 174.3582,-65.4182 174.5849,-70.1215 176.7983,-67.4102 176.7983,-67.4102 176.7983,-67.4102 174.5849,-70.1215 179.2385,-69.4023 172.3715,-72.8328 172.3715,-72.8328\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"203\" y=\"-68.8\">a &amp; c</text>\n",
+       "<text fill=\"#ff4da0\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"211\" y=\"-53.8\">❶</text>\n",
        "</g>\n",
        "<!-- 2&#45;&gt;2 -->\n",
-       "<g class=\"edge\" id=\"edge10\">\n",
-       "<title>2-&gt;2</title>\n",
-       "<path d=\"M156.2674,-44.0198C153.6685,-54.387 156.7461,-64.4783 165.5,-64.4783 172.2022,-64.4783 175.577,-58.563 175.6245,-51.1374\" fill=\"none\" stroke=\"#000000\"/>\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"147\" y=\"-83.2783\">a &amp; !b</text>\n",
-       "<text fill=\"#1f78b4\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"157.5\" y=\"-68.2783\">⓿</text>\n",
-       "</g>\n",
-       "<!-- 2&#45;&gt;3 -->\n",
        "<g class=\"edge\" id=\"edge11\">\n",
-       "<title>2-&gt;3</title>\n",
-       "<path d=\"M183.594,-27.7587C217.9351,-27.0979 294.2023,-29.0444 351,-55.4783 357.8232,-58.6539 364.2983,-63.5517 369.8268,-68.5683\" fill=\"none\" stroke=\"#000000\"/>\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"258\" y=\"-56.2783\">a &amp; b</text>\n",
-       "<text fill=\"#1f78b4\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"267\" y=\"-41.2783\">⓿</text>\n",
+       "<title>2-&gt;2</title>\n",
+       "<path d=\"M270.0012,-105.4099C269.0681,-115.0879 270.7344,-124 275,-124 278.1326,-124 279.8633,-119.1936 280.1921,-112.8073\" fill=\"none\" stroke=\"#000000\"/>\n",
+       "<polygon fill=\"#000000\" points=\"279.9988,-105.4099 283.3307,-112.3252 280.0903,-108.9087 280.1818,-112.4075 280.1818,-112.4075 280.1818,-112.4075 280.0903,-108.9087 277.0329,-112.4899 279.9988,-105.4099 279.9988,-105.4099\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"255\" y=\"-142.8\">!a &amp; !c</text>\n",
+       "<text fill=\"#1f78b4\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"267\" y=\"-127.8\">⓿</text>\n",
        "</g>\n",
-       "<!-- 3&#45;&gt;1 -->\n",
+       "<!-- 2&#45;&gt;2 -->\n",
        "<g class=\"edge\" id=\"edge12\">\n",
-       "<title>3-&gt;1</title>\n",
-       "<path d=\"M369.6229,-92.9087C350.7682,-98.8008 320.5243,-108.252 299.3164,-114.8795\" fill=\"none\" stroke=\"#000000\"/>\n",
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-       "<g class=\"edge\" id=\"edge13\">\n",
-       "<title>3-&gt;1</title>\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"313\" y=\"-83.2783\">!a &amp; c</text>\n",
-       "<text fill=\"#ff4da0\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"323\" y=\"-68.2783\">❶</text>\n",
-       "</g>\n",
-       "<!-- 3&#45;&gt;3 -->\n",
-       "<g class=\"edge\" id=\"edge14\">\n",
-       "<title>3-&gt;3</title>\n",
-       "<path d=\"M382.0012,-104.8882C381.0681,-114.5662 382.7344,-123.4783 387,-123.4783 390.1326,-123.4783 391.8633,-118.6719 392.1921,-112.2856\" fill=\"none\" stroke=\"#000000\"/>\n",
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-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"369\" y=\"-142.2783\">a &amp; !c</text>\n",
-       "<text fill=\"#1f78b4\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"379\" y=\"-127.2783\">⓿</text>\n",
-       "</g>\n",
-       "<!-- 3&#45;&gt;3 -->\n",
-       "<g class=\"edge\" id=\"edge15\">\n",
-       "<title>3-&gt;3</title>\n",
-       "<path d=\"M379.4634,-104.0742C373.769,-125.3416 376.2813,-153.4783 387,-153.4783 396.5883,-153.4783 399.6098,-130.9637 396.0645,-110.9915\" fill=\"none\" stroke=\"#000000\"/>\n",
-       "<polygon fill=\"#000000\" points=\"394.5366,-104.0742 399.1223,-110.23 395.2915,-107.4918 396.0464,-110.9094 396.0464,-110.9094 396.0464,-110.9094 395.2915,-107.4918 392.9706,-111.5889 394.5366,-104.0742 394.5366,-104.0742\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"371\" y=\"-171.2783\">a &amp; c</text>\n",
-       "<text fill=\"#1f78b4\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"371\" y=\"-157.2783\">⓿</text>\n",
-       "<text fill=\"#ff4da0\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"387\" y=\"-157.2783\">❶</text>\n",
+       "<title>2-&gt;2</title>\n",
+       "<path d=\"M267.4634,-104.5959C261.769,-125.8633 264.2813,-154 275,-154 284.5883,-154 287.6098,-131.4854 284.0645,-111.5132\" fill=\"none\" stroke=\"#000000\"/>\n",
+       "<polygon fill=\"#000000\" points=\"282.5366,-104.5959 287.1223,-110.7517 283.2915,-108.0135 284.0464,-111.4311 284.0464,-111.4311 284.0464,-111.4311 283.2915,-108.0135 280.9706,-112.1106 282.5366,-104.5959 282.5366,-104.5959\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"257\" y=\"-171.8\">!a &amp; c</text>\n",
+       "<text fill=\"#1f78b4\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"259\" y=\"-157.8\">⓿</text>\n",
+       "<text fill=\"#ff4da0\" font-family=\"Lato\" font-size=\"14.00\" text-anchor=\"start\" x=\"275\" y=\"-157.8\">❶</text>\n",
        "</g>\n",
        "</g>\n",
        "</svg></div>"
@@ -3121,7 +3062,7 @@
        "</svg>\n"
       ],
       "text/plain": [
-       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f5a6034ad20> >"
+       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7fb708544690> >"
       ]
      },
      "metadata": {},
@@ -3221,7 +3162,7 @@
        "</svg>\n"
       ],
       "text/plain": [
-       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f5a60301ba0> >"
+       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7fb708536d80> >"
       ]
      },
      "execution_count": 24,
@@ -3294,7 +3235,7 @@
        "</svg>\n"
       ],
       "text/plain": [
-       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f5a6030f9c0> >"
+       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7fb708544e40> >"
       ]
      },
      "execution_count": 25,
@@ -3458,7 +3399,7 @@
        "</svg>\n"
       ],
       "text/plain": [
-       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f5a6030f750> >"
+       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7fb708536bd0> >"
       ]
      },
      "execution_count": 27,
@@ -3541,7 +3482,7 @@
        "</svg>\n"
       ],
       "text/plain": [
-       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f5a6034ad20> >"
+       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7fb708544690> >"
       ]
      },
      "metadata": {},
@@ -3606,7 +3547,7 @@
        "</svg>\n"
       ],
       "text/plain": [
-       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f5a6034ad20> >"
+       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7fb708544690> >"
       ]
      },
      "metadata": {},
@@ -3693,7 +3634,7 @@
        "</svg>\n"
       ],
       "text/plain": [
-       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f5a6034ad20> >"
+       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7fb708544690> >"
       ]
      },
      "execution_count": 29,
diff --git a/tests/python/twagraph-internals.ipynb b/tests/python/twagraph-internals.ipynb
index dbd366d7c..dcd5d3588 100644
--- a/tests/python/twagraph-internals.ipynb
+++ b/tests/python/twagraph-internals.ipynb
@@ -56,16 +56,16 @@
        "<!-- Generated by graphviz version 2.40.1 (20161225.0304)\n",
        " -->\n",
        "<!-- Pages: 1 -->\n",
-       "<svg width=\"196pt\" height=\"222pt\"\n",
-       " viewBox=\"0.00 0.00 195.50 221.60\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\">\n",
+       "<svg width=\"198pt\" height=\"222pt\"\n",
+       " viewBox=\"0.00 0.00 197.50 221.60\" 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(4 217.597)\">\n",
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-       "<text text-anchor=\"start\" x=\"41.75\" y=\"-199.397\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">Fin(</text>\n",
-       "<text text-anchor=\"start\" x=\"66.75\" y=\"-199.397\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#1f78b4\">⓿</text>\n",
-       "<text text-anchor=\"start\" x=\"82.75\" y=\"-199.397\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">) &amp; Inf(</text>\n",
-       "<text text-anchor=\"start\" x=\"125.75\" y=\"-199.397\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#ff4da0\">❶</text>\n",
-       "<text text-anchor=\"start\" x=\"141.75\" y=\"-199.397\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">)</text>\n",
-       "<text text-anchor=\"start\" x=\"64.75\" y=\"-185.397\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">[Rabin 1]</text>\n",
+       "<polygon fill=\"#ffffff\" stroke=\"transparent\" points=\"-4,4 -4,-217.597 193.5,-217.597 193.5,4 -4,4\"/>\n",
+       "<text text-anchor=\"start\" x=\"42.75\" y=\"-199.397\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">Fin(</text>\n",
+       "<text text-anchor=\"start\" x=\"67.75\" y=\"-199.397\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#1f78b4\">⓿</text>\n",
+       "<text text-anchor=\"start\" x=\"83.75\" y=\"-199.397\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">) &amp; Inf(</text>\n",
+       "<text text-anchor=\"start\" x=\"126.75\" y=\"-199.397\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#ff4da0\">❶</text>\n",
+       "<text text-anchor=\"start\" x=\"142.75\" y=\"-199.397\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">)</text>\n",
+       "<text text-anchor=\"start\" x=\"65.75\" y=\"-185.397\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">[Rabin 1]</text>\n",
        "<!-- I -->\n",
        "<!-- 0 -->\n",
        "<g id=\"node2\" class=\"node\">\n",
@@ -84,7 +84,7 @@
        "<title>0&#45;&gt;0</title>\n",
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-       "<text text-anchor=\"start\" x=\"35.5\" y=\"-118.397\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">!a &amp; !b</text>\n",
+       "<text text-anchor=\"start\" x=\"37.5\" y=\"-118.397\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">a &amp; !b</text>\n",
        "<text text-anchor=\"start\" x=\"48\" y=\"-103.397\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#1f78b4\">⓿</text>\n",
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        "<!-- 0&#45;&gt;0 -->\n",
@@ -92,7 +92,7 @@
        "<title>0&#45;&gt;0</title>\n",
        "<path fill=\"none\" stroke=\"#000000\" d=\"M50.9906,-81.1741C47.5451,-102.315 49.2148,-129.597 56,-129.597 62.043,-129.597 64.0285,-107.9565 61.9564,-88.2876\"/>\n",
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-       "<text text-anchor=\"start\" x=\"37.5\" y=\"-148.397\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">!a &amp; b</text>\n",
+       "<text text-anchor=\"start\" x=\"39\" y=\"-148.397\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">a &amp; b</text>\n",
        "<text text-anchor=\"start\" x=\"48\" y=\"-133.397\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#ff4da0\">❶</text>\n",
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        "<!-- 1 -->\n",
@@ -106,14 +106,14 @@
        "<title>0&#45;&gt;1</title>\n",
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+       "<polygon fill=\"#ffff00\" points=\"542.5,-238 542.5,-259 569.5,-259 569.5,-238 542.5,-238\" stroke=\"transparent\"/>\n",
+       "<polygon fill=\"none\" points=\"542.5,-238 542.5,-259 569.5,-259 569.5,-238 542.5,-238\" stroke=\"#000000\"/>\n",
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        "<title>dests</title>\n",
-       "<polygon fill=\"#ffc0cb\" points=\"598.5,-301 598.5,-322 647.5,-322 647.5,-301 598.5,-301\" stroke=\"transparent\"/>\n",
-       "<polyline fill=\"none\" points=\"598.5,-301 647.5,-301 \" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"609\" y=\"-307.8\">dests</text>\n",
-       "<polygon fill=\"#ffc0cb\" points=\"647.5,-301 647.5,-322 668.5,-322 668.5,-301 647.5,-301\" stroke=\"transparent\"/>\n",
-       "<polyline fill=\"none\" points=\"647.5,-301 668.5,-301 \" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"650.5\" y=\"-307.8\">~0</text>\n",
-       "<polyline fill=\"none\" points=\"668.5,-301 681.5,-301 \" stroke=\"#000000\"/>\n",
-       "<polyline fill=\"none\" points=\"681.5,-301 694.5,-301 \" stroke=\"#000000\"/>\n",
-       "<polygon fill=\"#ffc0cb\" points=\"694.5,-301 694.5,-322 715.5,-322 715.5,-301 694.5,-301\" stroke=\"transparent\"/>\n",
-       "<polyline fill=\"none\" points=\"694.5,-301 715.5,-301 \" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"697.5\" y=\"-307.8\">~3</text>\n",
-       "<polyline fill=\"none\" points=\"715.5,-301 728.5,-301 \" stroke=\"#000000\"/>\n",
-       "<polyline fill=\"none\" points=\"728.5,-301 741.5,-301 \" stroke=\"#000000\"/>\n",
-       "<polygon fill=\"none\" points=\"598.5,-280 598.5,-301 647.5,-301 647.5,-280 598.5,-280\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"601.5\" y=\"-286.8\">#cnt/dst</text>\n",
-       "<polygon fill=\"none\" points=\"647.5,-280 647.5,-301 668.5,-301 668.5,-280 647.5,-280\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"651\" y=\"-286.8\">#2</text>\n",
-       "<polygon fill=\"#ffff00\" points=\"668.5,-280 668.5,-301 681.5,-301 681.5,-280 668.5,-280\" stroke=\"transparent\"/>\n",
-       "<polygon fill=\"none\" points=\"668.5,-280 668.5,-301 681.5,-301 681.5,-280 668.5,-280\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"671.5\" y=\"-286.8\">0</text>\n",
-       "<polygon fill=\"#ffff00\" points=\"681.5,-280 681.5,-301 694.5,-301 694.5,-280 681.5,-280\" stroke=\"transparent\"/>\n",
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-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"684.5\" y=\"-286.8\">3</text>\n",
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-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"698\" y=\"-286.8\">#2</text>\n",
-       "<polygon fill=\"#ffff00\" points=\"715.5,-280 715.5,-301 728.5,-301 728.5,-280 715.5,-280\" stroke=\"transparent\"/>\n",
-       "<polygon fill=\"none\" points=\"715.5,-280 715.5,-301 728.5,-301 728.5,-280 715.5,-280\" stroke=\"#000000\"/>\n",
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-       "<polygon fill=\"#ffff00\" points=\"728.5,-280 728.5,-301 741.5,-301 741.5,-280 728.5,-280\" stroke=\"transparent\"/>\n",
-       "<polygon fill=\"none\" points=\"728.5,-280 728.5,-301 741.5,-301 741.5,-280 728.5,-280\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"731.5\" y=\"-286.8\">1</text>\n",
+       "<polygon fill=\"#ffc0cb\" points=\"603.5,-301 603.5,-322 652.5,-322 652.5,-301 603.5,-301\" stroke=\"transparent\"/>\n",
+       "<polyline fill=\"none\" points=\"603.5,-301 652.5,-301 \" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"614\" y=\"-307.8\">dests</text>\n",
+       "<polygon fill=\"#ffc0cb\" points=\"652.5,-301 652.5,-322 673.5,-322 673.5,-301 652.5,-301\" stroke=\"transparent\"/>\n",
+       "<polyline fill=\"none\" points=\"652.5,-301 673.5,-301 \" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"655.5\" y=\"-307.8\">~0</text>\n",
+       "<polyline fill=\"none\" points=\"673.5,-301 686.5,-301 \" stroke=\"#000000\"/>\n",
+       "<polyline fill=\"none\" points=\"686.5,-301 699.5,-301 \" stroke=\"#000000\"/>\n",
+       "<polygon fill=\"#ffc0cb\" points=\"699.5,-301 699.5,-322 720.5,-322 720.5,-301 699.5,-301\" stroke=\"transparent\"/>\n",
+       "<polyline fill=\"none\" points=\"699.5,-301 720.5,-301 \" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"702.5\" y=\"-307.8\">~3</text>\n",
+       "<polyline fill=\"none\" points=\"720.5,-301 733.5,-301 \" stroke=\"#000000\"/>\n",
+       "<polyline fill=\"none\" points=\"733.5,-301 746.5,-301 \" stroke=\"#000000\"/>\n",
+       "<polygon fill=\"none\" points=\"603.5,-280 603.5,-301 652.5,-301 652.5,-280 603.5,-280\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"606.5\" y=\"-286.8\">#cnt/dst</text>\n",
+       "<polygon fill=\"none\" points=\"652.5,-280 652.5,-301 673.5,-301 673.5,-280 652.5,-280\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"656\" y=\"-286.8\">#2</text>\n",
+       "<polygon fill=\"#ffff00\" points=\"673.5,-280 673.5,-301 686.5,-301 686.5,-280 673.5,-280\" stroke=\"transparent\"/>\n",
+       "<polygon fill=\"none\" points=\"673.5,-280 673.5,-301 686.5,-301 686.5,-280 673.5,-280\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"676.5\" y=\"-286.8\">0</text>\n",
+       "<polygon fill=\"#ffff00\" points=\"686.5,-280 686.5,-301 699.5,-301 699.5,-280 686.5,-280\" stroke=\"transparent\"/>\n",
+       "<polygon fill=\"none\" points=\"686.5,-280 686.5,-301 699.5,-301 699.5,-280 686.5,-280\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"689.5\" y=\"-286.8\">3</text>\n",
+       "<polygon fill=\"none\" points=\"699.5,-280 699.5,-301 720.5,-301 720.5,-280 699.5,-280\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"703\" y=\"-286.8\">#2</text>\n",
+       "<polygon fill=\"#ffff00\" points=\"720.5,-280 720.5,-301 733.5,-301 733.5,-280 720.5,-280\" stroke=\"transparent\"/>\n",
+       "<polygon fill=\"none\" points=\"720.5,-280 720.5,-301 733.5,-301 733.5,-280 720.5,-280\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"723.5\" y=\"-286.8\">0</text>\n",
+       "<polygon fill=\"#ffff00\" points=\"733.5,-280 733.5,-301 746.5,-301 746.5,-280 733.5,-280\" stroke=\"transparent\"/>\n",
+       "<polygon fill=\"none\" points=\"733.5,-280 733.5,-301 746.5,-301 746.5,-280 733.5,-280\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"736.5\" y=\"-286.8\">1</text>\n",
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        "<!-- meta -->\n",
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@@ -3458,26 +3458,26 @@
        "<!-- props -->\n",
        "<g class=\"node\" id=\"node5\">\n",
        "<title>props</title>\n",
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-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"423.5\" y=\"-180.8\">maybe</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"279.5\" y=\"-161.8\">prop_inherently_weak:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"423.5\" y=\"-161.8\">maybe</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"279.5\" y=\"-142.8\">prop_terminal:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"423.5\" y=\"-142.8\">maybe</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"279.5\" y=\"-123.8\">prop_weak:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"423.5\" y=\"-123.8\">maybe</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"279.5\" y=\"-104.8\">prop_very_weak:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"423.5\" y=\"-104.8\">maybe</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"279.5\" y=\"-85.8\">prop_complete:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"423.5\" y=\"-85.8\">maybe</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"279.5\" y=\"-66.8\">prop_universal:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"423.5\" y=\"-66.8\">maybe</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"279.5\" y=\"-47.8\">prop_unambiguous:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"423.5\" y=\"-47.8\">maybe</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"279.5\" y=\"-28.8\">prop_semi_deterministic:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"423.5\" y=\"-28.8\">maybe</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"279.5\" y=\"-9.8\">prop_stutter_invariant:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"423.5\" y=\"-9.8\">maybe</text>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"281.5\" y=\"-180.8\">prop_state_acc:</text>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"425.5\" y=\"-180.8\">maybe</text>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"281.5\" y=\"-161.8\">prop_inherently_weak:</text>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"425.5\" y=\"-161.8\">maybe</text>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"281.5\" y=\"-142.8\">prop_terminal:</text>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"425.5\" y=\"-142.8\">maybe</text>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"281.5\" y=\"-123.8\">prop_weak:</text>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"425.5\" y=\"-123.8\">maybe</text>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"281.5\" y=\"-104.8\">prop_very_weak:</text>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"425.5\" y=\"-104.8\">maybe</text>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"281.5\" y=\"-85.8\">prop_complete:</text>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"425.5\" y=\"-85.8\">maybe</text>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"281.5\" y=\"-66.8\">prop_universal:</text>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"425.5\" y=\"-66.8\">maybe</text>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"281.5\" y=\"-47.8\">prop_unambiguous:</text>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"425.5\" y=\"-47.8\">maybe</text>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"281.5\" y=\"-28.8\">prop_semi_deterministic:</text>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"425.5\" y=\"-28.8\">maybe</text>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"281.5\" y=\"-9.8\">prop_stutter_invariant:</text>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"425.5\" y=\"-9.8\">maybe</text>\n",
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        "<!-- props&#45;&gt;edges -->\n",
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@@ -3627,16 +3627,16 @@
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        " -->\n",
        "<!-- Pages: 1 -->\n",
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-       " viewBox=\"0.00 0.00 466.30 278.00\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\">\n",
+       "<svg width=\"468pt\" height=\"278pt\"\n",
+       " viewBox=\"0.00 0.00 468.30 278.00\" 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(4 274)\">\n",
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-       "<text text-anchor=\"start\" x=\"218.15\" y=\"-255.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">) &amp; Inf(</text>\n",
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-       "<text text-anchor=\"start\" x=\"277.15\" y=\"-255.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">)</text>\n",
-       "<text text-anchor=\"start\" x=\"200.15\" y=\"-241.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">[Rabin 1]</text>\n",
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+       "<text text-anchor=\"start\" x=\"178.15\" y=\"-255.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">Fin(</text>\n",
+       "<text text-anchor=\"start\" x=\"203.15\" y=\"-255.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#1f78b4\">⓿</text>\n",
+       "<text text-anchor=\"start\" x=\"219.15\" y=\"-255.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">) &amp; Inf(</text>\n",
+       "<text text-anchor=\"start\" x=\"262.15\" y=\"-255.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#ff4da0\">❶</text>\n",
+       "<text text-anchor=\"start\" x=\"278.15\" y=\"-255.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">)</text>\n",
+       "<text text-anchor=\"start\" x=\"201.15\" y=\"-241.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">[Rabin 1]</text>\n",
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-       "<text text-anchor=\"start\" x=\"157.1\" y=\"-152.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">!a &amp; !b</text>\n",
+       "<text text-anchor=\"start\" x=\"159.1\" y=\"-152.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">a &amp; !b</text>\n",
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@@ -3698,7 +3698,7 @@
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-       "<text text-anchor=\"start\" x=\"290.2\" y=\"-222.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">a &amp; !b</text>\n",
+       "<text text-anchor=\"start\" x=\"288.2\" y=\"-222.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">!a &amp; !b</text>\n",
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@@ -3719,7 +3719,7 @@
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-       "<text text-anchor=\"start\" x=\"288.2\" y=\"-64.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">!a &amp; !b</text>\n",
+       "<text text-anchor=\"start\" x=\"290.2\" y=\"-64.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">a &amp; !b</text>\n",
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        "<g class=\"node\" id=\"node3\">\n",
        "<title>dests</title>\n",
-       "<polygon fill=\"#ffc0cb\" points=\"599.5,-301 599.5,-322 648.5,-322 648.5,-301 599.5,-301\" stroke=\"transparent\"/>\n",
-       "<polyline fill=\"none\" points=\"599.5,-301 648.5,-301 \" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"610\" y=\"-307.8\">dests</text>\n",
-       "<polygon fill=\"#ffc0cb\" points=\"648.5,-301 648.5,-322 669.5,-322 669.5,-301 648.5,-301\" stroke=\"transparent\"/>\n",
-       "<polyline fill=\"none\" points=\"648.5,-301 669.5,-301 \" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"651.5\" y=\"-307.8\">~0</text>\n",
-       "<polyline fill=\"none\" points=\"669.5,-301 682.5,-301 \" stroke=\"#000000\"/>\n",
-       "<polyline fill=\"none\" points=\"682.5,-301 695.5,-301 \" stroke=\"#000000\"/>\n",
-       "<polygon fill=\"#ffc0cb\" points=\"695.5,-301 695.5,-322 716.5,-322 716.5,-301 695.5,-301\" stroke=\"transparent\"/>\n",
-       "<polyline fill=\"none\" points=\"695.5,-301 716.5,-301 \" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"698.5\" y=\"-307.8\">~3</text>\n",
-       "<polyline fill=\"none\" points=\"716.5,-301 729.5,-301 \" stroke=\"#000000\"/>\n",
-       "<polyline fill=\"none\" points=\"729.5,-301 742.5,-301 \" stroke=\"#000000\"/>\n",
-       "<polygon fill=\"#ffc0cb\" points=\"742.5,-301 742.5,-322 763.5,-322 763.5,-301 742.5,-301\" stroke=\"transparent\"/>\n",
-       "<polyline fill=\"none\" points=\"742.5,-301 763.5,-301 \" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"745.5\" y=\"-307.8\">~6</text>\n",
-       "<polyline fill=\"none\" points=\"763.5,-301 776.5,-301 \" stroke=\"#000000\"/>\n",
-       "<polyline fill=\"none\" points=\"776.5,-301 789.5,-301 \" stroke=\"#000000\"/>\n",
-       "<polyline fill=\"none\" points=\"789.5,-301 802.5,-301 \" stroke=\"#000000\"/>\n",
-       "<polygon fill=\"none\" points=\"599.5,-280 599.5,-301 648.5,-301 648.5,-280 599.5,-280\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"602.5\" y=\"-286.8\">#cnt/dst</text>\n",
-       "<polygon fill=\"none\" points=\"648.5,-280 648.5,-301 669.5,-301 669.5,-280 648.5,-280\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"652\" y=\"-286.8\">#2</text>\n",
-       "<polygon fill=\"#ffff00\" points=\"669.5,-280 669.5,-301 682.5,-301 682.5,-280 669.5,-280\" stroke=\"transparent\"/>\n",
-       "<polygon fill=\"none\" points=\"669.5,-280 669.5,-301 682.5,-301 682.5,-280 669.5,-280\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"672.5\" y=\"-286.8\">0</text>\n",
-       "<polygon fill=\"#ffff00\" points=\"682.5,-280 682.5,-301 695.5,-301 695.5,-280 682.5,-280\" stroke=\"transparent\"/>\n",
-       "<polygon fill=\"none\" points=\"682.5,-280 682.5,-301 695.5,-301 695.5,-280 682.5,-280\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"685.5\" y=\"-286.8\">3</text>\n",
-       "<polygon fill=\"none\" points=\"695.5,-280 695.5,-301 716.5,-301 716.5,-280 695.5,-280\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"699\" y=\"-286.8\">#2</text>\n",
-       "<polygon fill=\"#ffff00\" points=\"716.5,-280 716.5,-301 729.5,-301 729.5,-280 716.5,-280\" stroke=\"transparent\"/>\n",
-       "<polygon fill=\"none\" points=\"716.5,-280 716.5,-301 729.5,-301 729.5,-280 716.5,-280\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"719.5\" y=\"-286.8\">0</text>\n",
-       "<polygon fill=\"#ffff00\" points=\"729.5,-280 729.5,-301 742.5,-301 742.5,-280 729.5,-280\" stroke=\"transparent\"/>\n",
-       "<polygon fill=\"none\" points=\"729.5,-280 729.5,-301 742.5,-301 742.5,-280 729.5,-280\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"732.5\" y=\"-286.8\">1</text>\n",
-       "<polygon fill=\"none\" points=\"742.5,-280 742.5,-301 763.5,-301 763.5,-280 742.5,-280\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"746\" y=\"-286.8\">#3</text>\n",
-       "<polygon fill=\"#ffff00\" points=\"763.5,-280 763.5,-301 776.5,-301 776.5,-280 763.5,-280\" stroke=\"transparent\"/>\n",
-       "<polygon fill=\"none\" points=\"763.5,-280 763.5,-301 776.5,-301 776.5,-280 763.5,-280\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"766.5\" y=\"-286.8\">0</text>\n",
-       "<polygon fill=\"#ffff00\" points=\"776.5,-280 776.5,-301 789.5,-301 789.5,-280 776.5,-280\" stroke=\"transparent\"/>\n",
-       "<polygon fill=\"none\" points=\"776.5,-280 776.5,-301 789.5,-301 789.5,-280 776.5,-280\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"779.5\" y=\"-286.8\">1</text>\n",
-       "<polygon fill=\"#ffff00\" points=\"789.5,-280 789.5,-301 802.5,-301 802.5,-280 789.5,-280\" stroke=\"transparent\"/>\n",
-       "<polygon fill=\"none\" points=\"789.5,-280 789.5,-301 802.5,-301 802.5,-280 789.5,-280\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"792.5\" y=\"-286.8\">2</text>\n",
+       "<polygon fill=\"#ffc0cb\" points=\"603.5,-301 603.5,-322 652.5,-322 652.5,-301 603.5,-301\" stroke=\"transparent\"/>\n",
+       "<polyline fill=\"none\" points=\"603.5,-301 652.5,-301 \" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"614\" y=\"-307.8\">dests</text>\n",
+       "<polygon fill=\"#ffc0cb\" points=\"652.5,-301 652.5,-322 673.5,-322 673.5,-301 652.5,-301\" stroke=\"transparent\"/>\n",
+       "<polyline fill=\"none\" points=\"652.5,-301 673.5,-301 \" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"655.5\" y=\"-307.8\">~0</text>\n",
+       "<polyline fill=\"none\" points=\"673.5,-301 686.5,-301 \" stroke=\"#000000\"/>\n",
+       "<polyline fill=\"none\" points=\"686.5,-301 699.5,-301 \" stroke=\"#000000\"/>\n",
+       "<polygon fill=\"#ffc0cb\" points=\"699.5,-301 699.5,-322 720.5,-322 720.5,-301 699.5,-301\" stroke=\"transparent\"/>\n",
+       "<polyline fill=\"none\" points=\"699.5,-301 720.5,-301 \" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"702.5\" y=\"-307.8\">~3</text>\n",
+       "<polyline fill=\"none\" points=\"720.5,-301 733.5,-301 \" stroke=\"#000000\"/>\n",
+       "<polyline fill=\"none\" points=\"733.5,-301 746.5,-301 \" stroke=\"#000000\"/>\n",
+       "<polygon fill=\"#ffc0cb\" points=\"746.5,-301 746.5,-322 767.5,-322 767.5,-301 746.5,-301\" stroke=\"transparent\"/>\n",
+       "<polyline fill=\"none\" points=\"746.5,-301 767.5,-301 \" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"749.5\" y=\"-307.8\">~6</text>\n",
+       "<polyline fill=\"none\" points=\"767.5,-301 780.5,-301 \" stroke=\"#000000\"/>\n",
+       "<polyline fill=\"none\" points=\"780.5,-301 793.5,-301 \" stroke=\"#000000\"/>\n",
+       "<polyline fill=\"none\" points=\"793.5,-301 806.5,-301 \" stroke=\"#000000\"/>\n",
+       "<polygon fill=\"none\" points=\"603.5,-280 603.5,-301 652.5,-301 652.5,-280 603.5,-280\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"606.5\" y=\"-286.8\">#cnt/dst</text>\n",
+       "<polygon fill=\"none\" points=\"652.5,-280 652.5,-301 673.5,-301 673.5,-280 652.5,-280\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"656\" y=\"-286.8\">#2</text>\n",
+       "<polygon fill=\"#ffff00\" points=\"673.5,-280 673.5,-301 686.5,-301 686.5,-280 673.5,-280\" stroke=\"transparent\"/>\n",
+       "<polygon fill=\"none\" points=\"673.5,-280 673.5,-301 686.5,-301 686.5,-280 673.5,-280\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"676.5\" y=\"-286.8\">0</text>\n",
+       "<polygon fill=\"#ffff00\" points=\"686.5,-280 686.5,-301 699.5,-301 699.5,-280 686.5,-280\" stroke=\"transparent\"/>\n",
+       "<polygon fill=\"none\" points=\"686.5,-280 686.5,-301 699.5,-301 699.5,-280 686.5,-280\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"689.5\" y=\"-286.8\">3</text>\n",
+       "<polygon fill=\"none\" points=\"699.5,-280 699.5,-301 720.5,-301 720.5,-280 699.5,-280\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"703\" y=\"-286.8\">#2</text>\n",
+       "<polygon fill=\"#ffff00\" points=\"720.5,-280 720.5,-301 733.5,-301 733.5,-280 720.5,-280\" stroke=\"transparent\"/>\n",
+       "<polygon fill=\"none\" points=\"720.5,-280 720.5,-301 733.5,-301 733.5,-280 720.5,-280\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"723.5\" y=\"-286.8\">0</text>\n",
+       "<polygon fill=\"#ffff00\" points=\"733.5,-280 733.5,-301 746.5,-301 746.5,-280 733.5,-280\" stroke=\"transparent\"/>\n",
+       "<polygon fill=\"none\" points=\"733.5,-280 733.5,-301 746.5,-301 746.5,-280 733.5,-280\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"736.5\" y=\"-286.8\">1</text>\n",
+       "<polygon fill=\"none\" points=\"746.5,-280 746.5,-301 767.5,-301 767.5,-280 746.5,-280\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"750\" y=\"-286.8\">#3</text>\n",
+       "<polygon fill=\"#ffff00\" points=\"767.5,-280 767.5,-301 780.5,-301 780.5,-280 767.5,-280\" stroke=\"transparent\"/>\n",
+       "<polygon fill=\"none\" points=\"767.5,-280 767.5,-301 780.5,-301 780.5,-280 767.5,-280\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"770.5\" y=\"-286.8\">0</text>\n",
+       "<polygon fill=\"#ffff00\" points=\"780.5,-280 780.5,-301 793.5,-301 793.5,-280 780.5,-280\" stroke=\"transparent\"/>\n",
+       "<polygon fill=\"none\" points=\"780.5,-280 780.5,-301 793.5,-301 793.5,-280 780.5,-280\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"783.5\" y=\"-286.8\">1</text>\n",
+       "<polygon fill=\"#ffff00\" points=\"793.5,-280 793.5,-301 806.5,-301 806.5,-280 793.5,-280\" stroke=\"transparent\"/>\n",
+       "<polygon fill=\"none\" points=\"793.5,-280 793.5,-301 806.5,-301 806.5,-280 793.5,-280\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"796.5\" y=\"-286.8\">2</text>\n",
        "</g>\n",
        "<!-- meta -->\n",
        "<g class=\"node\" id=\"node4\">\n",
@@ -4115,26 +4115,26 @@
        "<!-- props -->\n",
        "<g class=\"node\" id=\"node5\">\n",
        "<title>props</title>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"279.5\" y=\"-180.8\">prop_state_acc:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"423.5\" y=\"-180.8\">maybe</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"279.5\" y=\"-161.8\">prop_inherently_weak:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"423.5\" y=\"-161.8\">maybe</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"279.5\" y=\"-142.8\">prop_terminal:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"423.5\" y=\"-142.8\">maybe</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"279.5\" y=\"-123.8\">prop_weak:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"423.5\" y=\"-123.8\">maybe</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"279.5\" y=\"-104.8\">prop_very_weak:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"423.5\" y=\"-104.8\">maybe</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"279.5\" y=\"-85.8\">prop_complete:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"423.5\" y=\"-85.8\">maybe</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"279.5\" y=\"-66.8\">prop_universal:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"423.5\" y=\"-66.8\">maybe</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"279.5\" y=\"-47.8\">prop_unambiguous:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"423.5\" y=\"-47.8\">maybe</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"279.5\" y=\"-28.8\">prop_semi_deterministic:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"423.5\" y=\"-28.8\">maybe</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"279.5\" y=\"-9.8\">prop_stutter_invariant:</text>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"423.5\" y=\"-9.8\">maybe</text>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"281.5\" y=\"-180.8\">prop_state_acc:</text>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"425.5\" y=\"-180.8\">maybe</text>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"281.5\" y=\"-161.8\">prop_inherently_weak:</text>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"425.5\" y=\"-161.8\">maybe</text>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"281.5\" y=\"-142.8\">prop_terminal:</text>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"425.5\" y=\"-142.8\">maybe</text>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"281.5\" y=\"-123.8\">prop_weak:</text>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"425.5\" y=\"-123.8\">maybe</text>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"281.5\" y=\"-104.8\">prop_very_weak:</text>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"425.5\" y=\"-104.8\">maybe</text>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"281.5\" y=\"-85.8\">prop_complete:</text>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"425.5\" y=\"-85.8\">maybe</text>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"281.5\" y=\"-66.8\">prop_universal:</text>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"425.5\" y=\"-66.8\">maybe</text>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"281.5\" y=\"-47.8\">prop_unambiguous:</text>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"425.5\" y=\"-47.8\">maybe</text>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"281.5\" y=\"-28.8\">prop_semi_deterministic:</text>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"425.5\" y=\"-28.8\">maybe</text>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"281.5\" y=\"-9.8\">prop_stutter_invariant:</text>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"425.5\" y=\"-9.8\">maybe</text>\n",
        "</g>\n",
        "<!-- props&#45;&gt;edges -->\n",
        "</g>\n",
@@ -4174,16 +4174,16 @@
        "<!-- Generated by graphviz version 2.40.1 (20161225.0304)\n",
        " -->\n",
        "<!-- Pages: 1 -->\n",
-       "<svg width=\"464pt\" height=\"360pt\"\n",
-       " viewBox=\"0.00 0.00 463.72 360.00\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\">\n",
+       "<svg width=\"466pt\" height=\"360pt\"\n",
+       " viewBox=\"0.00 0.00 465.71 360.00\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\">\n",
        "<g id=\"graph0\" class=\"graph\" transform=\"scale(.9945 .9945) rotate(0) translate(4 358)\">\n",
-       "<polygon fill=\"#ffffff\" stroke=\"transparent\" points=\"-4,4 -4,-358 462.3,-358 462.3,4 -4,4\"/>\n",
-       "<text text-anchor=\"start\" x=\"177.15\" y=\"-339.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">Fin(</text>\n",
-       "<text text-anchor=\"start\" x=\"202.15\" y=\"-339.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#1f78b4\">⓿</text>\n",
-       "<text text-anchor=\"start\" x=\"218.15\" y=\"-339.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">) &amp; Inf(</text>\n",
-       "<text text-anchor=\"start\" x=\"261.15\" y=\"-339.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#ff4da0\">❶</text>\n",
-       "<text text-anchor=\"start\" x=\"277.15\" y=\"-339.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">)</text>\n",
-       "<text text-anchor=\"start\" x=\"200.15\" y=\"-325.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">[Rabin 1]</text>\n",
+       "<polygon fill=\"#ffffff\" stroke=\"transparent\" points=\"-4,4 -4,-358 464.3,-358 464.3,4 -4,4\"/>\n",
+       "<text text-anchor=\"start\" x=\"178.15\" y=\"-339.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">Fin(</text>\n",
+       "<text text-anchor=\"start\" x=\"203.15\" y=\"-339.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#1f78b4\">⓿</text>\n",
+       "<text text-anchor=\"start\" x=\"219.15\" y=\"-339.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">) &amp; Inf(</text>\n",
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+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"477.5\" y=\"-172.8\">1</text>\n",
+       "<polygon fill=\"#ffff00\" points=\"499.5,-166 499.5,-187 519.5,-187 519.5,-166 499.5,-166\" stroke=\"transparent\"/>\n",
+       "<polygon fill=\"none\" points=\"499.5,-166 499.5,-187 519.5,-187 519.5,-166 499.5,-166\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"506\" y=\"-172.8\">0</text>\n",
+       "<polygon fill=\"#ffc0cb\" points=\"519.5,-166 519.5,-187 546.5,-187 546.5,-166 519.5,-166\" stroke=\"transparent\"/>\n",
+       "<polygon fill=\"none\" points=\"519.5,-166 519.5,-187 546.5,-187 546.5,-166 519.5,-166\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"525.5\" y=\"-172.8\">~0</text>\n",
+       "<polygon fill=\"#ffc0cb\" points=\"546.5,-166 546.5,-187 573.5,-187 573.5,-166 546.5,-166\" stroke=\"transparent\"/>\n",
+       "<polygon fill=\"none\" points=\"546.5,-166 546.5,-187 573.5,-187 573.5,-166 546.5,-166\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"552.5\" y=\"-172.8\">~3</text>\n",
+       "<polygon fill=\"#ffc0cb\" points=\"573.5,-166 573.5,-187 601.5,-187 601.5,-166 573.5,-166\" stroke=\"transparent\"/>\n",
+       "<polygon fill=\"none\" points=\"573.5,-166 573.5,-187 601.5,-187 601.5,-166 573.5,-166\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"576.5\" y=\"-172.8\">~10</text>\n",
+       "<polygon fill=\"none\" points=\"178.5,-145 178.5,-166 239.5,-166 239.5,-145 178.5,-145\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"181.5\" y=\"-151.8\">next_succ</text>\n",
+       "<polygon fill=\"#00ffff\" points=\"239.5,-145 239.5,-166 282.5,-166 282.5,-145 239.5,-145\" stroke=\"transparent\"/>\n",
+       "<polygon fill=\"none\" points=\"239.5,-145 239.5,-166 282.5,-166 282.5,-145 239.5,-145\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"257.5\" y=\"-151.8\">2</text>\n",
+       "<polygon fill=\"#00ffff\" points=\"282.5,-145 282.5,-166 329.5,-166 329.5,-145 282.5,-145\" stroke=\"transparent\"/>\n",
+       "<polygon fill=\"none\" points=\"282.5,-145 282.5,-166 329.5,-166 329.5,-145 282.5,-145\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"302.5\" y=\"-151.8\">8</text>\n",
+       "<polygon fill=\"#00ffff\" points=\"329.5,-145 329.5,-166 372.5,-166 372.5,-145 329.5,-145\" stroke=\"transparent\"/>\n",
+       "<polygon fill=\"none\" points=\"329.5,-145 329.5,-166 372.5,-166 372.5,-145 329.5,-145\" stroke=\"#000000\"/>\n",
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+       "<polygon fill=\"none\" points=\"419.5,-145 419.5,-166 462.5,-166 462.5,-145 419.5,-145\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"437.5\" y=\"-151.8\">6</text>\n",
+       "<polygon fill=\"none\" points=\"462.5,-145 462.5,-166 499.5,-166 499.5,-145 462.5,-145\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"477.5\" y=\"-151.8\">0</text>\n",
+       "<polygon fill=\"none\" points=\"499.5,-145 499.5,-166 519.5,-166 519.5,-145 499.5,-145\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"506\" y=\"-151.8\">0</text>\n",
+       "<polygon fill=\"none\" points=\"519.5,-145 519.5,-166 546.5,-166 546.5,-145 519.5,-145\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"529.5\" y=\"-151.8\">0</text>\n",
+       "<polygon fill=\"#00ffff\" points=\"546.5,-145 546.5,-166 573.5,-166 573.5,-145 546.5,-145\" stroke=\"transparent\"/>\n",
+       "<polygon fill=\"none\" points=\"546.5,-145 546.5,-166 573.5,-166 573.5,-145 546.5,-145\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"553\" y=\"-151.8\">10</text>\n",
+       "<polygon fill=\"none\" points=\"573.5,-145 573.5,-166 601.5,-166 601.5,-145 573.5,-145\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"584\" y=\"-151.8\">0</text>\n",
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+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"201\" y=\"-130.8\">src</text>\n",
+       "<polygon fill=\"#ffff00\" points=\"239.5,-124 239.5,-145 282.5,-145 282.5,-124 239.5,-124\" stroke=\"transparent\"/>\n",
+       "<polygon fill=\"none\" points=\"239.5,-124 239.5,-145 282.5,-145 282.5,-124 239.5,-124\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"257.5\" y=\"-130.8\">0</text>\n",
+       "<polygon fill=\"#ffff00\" points=\"282.5,-124 282.5,-145 329.5,-145 329.5,-124 282.5,-124\" stroke=\"transparent\"/>\n",
+       "<polygon fill=\"none\" points=\"282.5,-124 282.5,-145 329.5,-145 329.5,-124 282.5,-124\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"302.5\" y=\"-130.8\">0</text>\n",
+       "<polygon fill=\"#ffff00\" points=\"329.5,-124 329.5,-145 372.5,-145 372.5,-124 329.5,-124\" stroke=\"transparent\"/>\n",
+       "<polygon fill=\"none\" points=\"329.5,-124 329.5,-145 372.5,-145 372.5,-124 329.5,-124\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"347.5\" y=\"-130.8\">1</text>\n",
+       "<polygon fill=\"#ffff00\" points=\"372.5,-124 372.5,-145 419.5,-145 419.5,-124 372.5,-124\" stroke=\"transparent\"/>\n",
+       "<polygon fill=\"none\" points=\"372.5,-124 372.5,-145 419.5,-145 419.5,-124 372.5,-124\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"392.5\" y=\"-130.8\">1</text>\n",
+       "<polygon fill=\"#ffff00\" points=\"419.5,-124 419.5,-145 462.5,-145 462.5,-124 419.5,-124\" stroke=\"transparent\"/>\n",
+       "<polygon fill=\"none\" points=\"419.5,-124 419.5,-145 462.5,-145 462.5,-124 419.5,-124\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"437.5\" y=\"-130.8\">1</text>\n",
+       "<polygon fill=\"#ffff00\" points=\"462.5,-124 462.5,-145 499.5,-145 499.5,-124 462.5,-124\" stroke=\"transparent\"/>\n",
+       "<polygon fill=\"none\" points=\"462.5,-124 462.5,-145 499.5,-145 499.5,-124 462.5,-124\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"477.5\" y=\"-130.8\">1</text>\n",
+       "<polygon fill=\"#ffff00\" points=\"499.5,-124 499.5,-145 519.5,-145 519.5,-124 499.5,-124\" stroke=\"transparent\"/>\n",
+       "<polygon fill=\"none\" points=\"499.5,-124 499.5,-145 519.5,-145 519.5,-124 499.5,-124\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"506\" y=\"-130.8\">2</text>\n",
+       "<polygon fill=\"#ffff00\" points=\"519.5,-124 519.5,-145 546.5,-145 546.5,-124 519.5,-124\" stroke=\"transparent\"/>\n",
+       "<polygon fill=\"none\" points=\"519.5,-124 519.5,-145 546.5,-145 546.5,-124 519.5,-124\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"529.5\" y=\"-130.8\">0</text>\n",
+       "<polygon fill=\"#ffff00\" points=\"546.5,-124 546.5,-145 573.5,-145 573.5,-124 546.5,-124\" stroke=\"transparent\"/>\n",
+       "<polygon fill=\"none\" points=\"546.5,-124 546.5,-145 573.5,-145 573.5,-124 546.5,-124\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"556.5\" y=\"-130.8\">3</text>\n",
+       "<polygon fill=\"#ffff00\" points=\"573.5,-124 573.5,-145 601.5,-145 601.5,-124 573.5,-124\" stroke=\"transparent\"/>\n",
+       "<polygon fill=\"none\" points=\"573.5,-124 573.5,-145 601.5,-145 601.5,-124 573.5,-124\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"584\" y=\"-130.8\">3</text>\n",
        "</g>\n",
        "<!-- dests -->\n",
        "<g class=\"node\" id=\"node3\">\n",
        "<title>dests</title>\n",
-       "<polygon fill=\"#ffc0cb\" points=\"630.5,-187 630.5,-208 679.5,-208 679.5,-187 630.5,-187\" stroke=\"transparent\"/>\n",
-       "<polyline fill=\"none\" points=\"630.5,-187 679.5,-187 \" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"641\" y=\"-193.8\">dests</text>\n",
-       "<polygon fill=\"#ffc0cb\" points=\"679.5,-187 679.5,-208 700.5,-208 700.5,-187 679.5,-187\" stroke=\"transparent\"/>\n",
-       "<polyline fill=\"none\" points=\"679.5,-187 700.5,-187 \" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"682.5\" y=\"-193.8\">~0</text>\n",
-       "<polyline fill=\"none\" points=\"700.5,-187 713.5,-187 \" stroke=\"#000000\"/>\n",
-       "<polyline fill=\"none\" points=\"713.5,-187 726.5,-187 \" stroke=\"#000000\"/>\n",
-       "<polygon fill=\"#ffc0cb\" points=\"726.5,-187 726.5,-208 747.5,-208 747.5,-187 726.5,-187\" stroke=\"transparent\"/>\n",
-       "<polyline fill=\"none\" points=\"726.5,-187 747.5,-187 \" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"729.5\" y=\"-193.8\">~3</text>\n",
-       "<polyline fill=\"none\" points=\"747.5,-187 760.5,-187 \" stroke=\"#000000\"/>\n",
-       "<polyline fill=\"none\" points=\"760.5,-187 773.5,-187 \" stroke=\"#000000\"/>\n",
-       "<polygon fill=\"#ffc0cb\" points=\"773.5,-187 773.5,-208 794.5,-208 794.5,-187 773.5,-187\" stroke=\"transparent\"/>\n",
-       "<polyline fill=\"none\" points=\"773.5,-187 794.5,-187 \" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"776.5\" y=\"-193.8\">~6</text>\n",
-       "<polyline fill=\"none\" points=\"794.5,-187 807.5,-187 \" stroke=\"#000000\"/>\n",
-       "<polyline fill=\"none\" points=\"807.5,-187 820.5,-187 \" stroke=\"#000000\"/>\n",
-       "<polyline fill=\"none\" points=\"820.5,-187 833.5,-187 \" stroke=\"#000000\"/>\n",
-       "<polygon fill=\"#ffc0cb\" points=\"833.5,-187 833.5,-208 861.5,-208 861.5,-187 833.5,-187\" stroke=\"transparent\"/>\n",
-       "<polyline fill=\"none\" points=\"833.5,-187 861.5,-187 \" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"836.5\" y=\"-193.8\">~10</text>\n",
-       "<polyline fill=\"none\" points=\"861.5,-187 874.5,-187 \" stroke=\"#000000\"/>\n",
-       "<polyline fill=\"none\" points=\"874.5,-187 887.5,-187 \" stroke=\"#000000\"/>\n",
-       "<polygon fill=\"none\" points=\"630.5,-166 630.5,-187 679.5,-187 679.5,-166 630.5,-166\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"633.5\" y=\"-172.8\">#cnt/dst</text>\n",
-       "<polygon fill=\"none\" points=\"679.5,-166 679.5,-187 700.5,-187 700.5,-166 679.5,-166\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"683\" y=\"-172.8\">#2</text>\n",
-       "<polygon fill=\"#ffff00\" points=\"700.5,-166 700.5,-187 713.5,-187 713.5,-166 700.5,-166\" stroke=\"transparent\"/>\n",
-       "<polygon fill=\"none\" points=\"700.5,-166 700.5,-187 713.5,-187 713.5,-166 700.5,-166\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"703.5\" y=\"-172.8\">0</text>\n",
-       "<polygon fill=\"#ffff00\" points=\"713.5,-166 713.5,-187 726.5,-187 726.5,-166 713.5,-166\" stroke=\"transparent\"/>\n",
-       "<polygon fill=\"none\" points=\"713.5,-166 713.5,-187 726.5,-187 726.5,-166 713.5,-166\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"716.5\" y=\"-172.8\">3</text>\n",
-       "<polygon fill=\"none\" points=\"726.5,-166 726.5,-187 747.5,-187 747.5,-166 726.5,-166\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"730\" y=\"-172.8\">#2</text>\n",
-       "<polygon fill=\"#ffff00\" points=\"747.5,-166 747.5,-187 760.5,-187 760.5,-166 747.5,-166\" stroke=\"transparent\"/>\n",
-       "<polygon fill=\"none\" points=\"747.5,-166 747.5,-187 760.5,-187 760.5,-166 747.5,-166\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"750.5\" y=\"-172.8\">0</text>\n",
-       "<polygon fill=\"#ffff00\" points=\"760.5,-166 760.5,-187 773.5,-187 773.5,-166 760.5,-166\" stroke=\"transparent\"/>\n",
-       "<polygon fill=\"none\" points=\"760.5,-166 760.5,-187 773.5,-187 773.5,-166 760.5,-166\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"763.5\" y=\"-172.8\">1</text>\n",
-       "<polygon fill=\"none\" points=\"773.5,-166 773.5,-187 794.5,-187 794.5,-166 773.5,-166\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"777\" y=\"-172.8\">#3</text>\n",
-       "<polygon fill=\"#ffff00\" points=\"794.5,-166 794.5,-187 807.5,-187 807.5,-166 794.5,-166\" stroke=\"transparent\"/>\n",
-       "<polygon fill=\"none\" points=\"794.5,-166 794.5,-187 807.5,-187 807.5,-166 794.5,-166\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"797.5\" y=\"-172.8\">0</text>\n",
-       "<polygon fill=\"#ffff00\" points=\"807.5,-166 807.5,-187 820.5,-187 820.5,-166 807.5,-166\" stroke=\"transparent\"/>\n",
-       "<polygon fill=\"none\" points=\"807.5,-166 807.5,-187 820.5,-187 820.5,-166 807.5,-166\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"810.5\" y=\"-172.8\">1</text>\n",
-       "<polygon fill=\"#ffff00\" points=\"820.5,-166 820.5,-187 833.5,-187 833.5,-166 820.5,-166\" stroke=\"transparent\"/>\n",
-       "<polygon fill=\"none\" points=\"820.5,-166 820.5,-187 833.5,-187 833.5,-166 820.5,-166\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"823.5\" y=\"-172.8\">2</text>\n",
-       "<polygon fill=\"none\" points=\"833.5,-166 833.5,-187 861.5,-187 861.5,-166 833.5,-166\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"840.5\" y=\"-172.8\">#2</text>\n",
-       "<polygon fill=\"#ffff00\" points=\"861.5,-166 861.5,-187 874.5,-187 874.5,-166 861.5,-166\" stroke=\"transparent\"/>\n",
-       "<polygon fill=\"none\" points=\"861.5,-166 861.5,-187 874.5,-187 874.5,-166 861.5,-166\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"864.5\" y=\"-172.8\">0</text>\n",
-       "<polygon fill=\"#ffff00\" points=\"874.5,-166 874.5,-187 887.5,-187 887.5,-166 874.5,-166\" stroke=\"transparent\"/>\n",
-       "<polygon fill=\"none\" points=\"874.5,-166 874.5,-187 887.5,-187 887.5,-166 874.5,-166\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"877.5\" y=\"-172.8\">3</text>\n",
+       "<polygon fill=\"#ffc0cb\" points=\"635.5,-187 635.5,-208 684.5,-208 684.5,-187 635.5,-187\" stroke=\"transparent\"/>\n",
+       "<polyline fill=\"none\" points=\"635.5,-187 684.5,-187 \" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"646\" y=\"-193.8\">dests</text>\n",
+       "<polygon fill=\"#ffc0cb\" points=\"684.5,-187 684.5,-208 705.5,-208 705.5,-187 684.5,-187\" stroke=\"transparent\"/>\n",
+       "<polyline fill=\"none\" points=\"684.5,-187 705.5,-187 \" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"687.5\" y=\"-193.8\">~0</text>\n",
+       "<polyline fill=\"none\" points=\"705.5,-187 718.5,-187 \" stroke=\"#000000\"/>\n",
+       "<polyline fill=\"none\" points=\"718.5,-187 731.5,-187 \" stroke=\"#000000\"/>\n",
+       "<polygon fill=\"#ffc0cb\" points=\"731.5,-187 731.5,-208 752.5,-208 752.5,-187 731.5,-187\" stroke=\"transparent\"/>\n",
+       "<polyline fill=\"none\" points=\"731.5,-187 752.5,-187 \" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"734.5\" y=\"-193.8\">~3</text>\n",
+       "<polyline fill=\"none\" points=\"752.5,-187 765.5,-187 \" stroke=\"#000000\"/>\n",
+       "<polyline fill=\"none\" points=\"765.5,-187 778.5,-187 \" stroke=\"#000000\"/>\n",
+       "<polygon fill=\"#ffc0cb\" points=\"778.5,-187 778.5,-208 799.5,-208 799.5,-187 778.5,-187\" stroke=\"transparent\"/>\n",
+       "<polyline fill=\"none\" points=\"778.5,-187 799.5,-187 \" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"781.5\" y=\"-193.8\">~6</text>\n",
+       "<polyline fill=\"none\" points=\"799.5,-187 812.5,-187 \" stroke=\"#000000\"/>\n",
+       "<polyline fill=\"none\" points=\"812.5,-187 825.5,-187 \" stroke=\"#000000\"/>\n",
+       "<polyline fill=\"none\" points=\"825.5,-187 838.5,-187 \" stroke=\"#000000\"/>\n",
+       "<polygon fill=\"#ffc0cb\" points=\"838.5,-187 838.5,-208 866.5,-208 866.5,-187 838.5,-187\" stroke=\"transparent\"/>\n",
+       "<polyline fill=\"none\" points=\"838.5,-187 866.5,-187 \" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"841.5\" y=\"-193.8\">~10</text>\n",
+       "<polyline fill=\"none\" points=\"866.5,-187 879.5,-187 \" stroke=\"#000000\"/>\n",
+       "<polyline fill=\"none\" points=\"879.5,-187 892.5,-187 \" stroke=\"#000000\"/>\n",
+       "<polygon fill=\"none\" points=\"635.5,-166 635.5,-187 684.5,-187 684.5,-166 635.5,-166\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"638.5\" y=\"-172.8\">#cnt/dst</text>\n",
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        "<title>dests</title>\n",
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-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"729\" y=\"-172.8\">#2</text>\n",
-       "<polygon fill=\"#ffff00\" points=\"746.5,-166 746.5,-187 759.5,-187 759.5,-166 746.5,-166\" stroke=\"transparent\"/>\n",
-       "<polygon fill=\"none\" points=\"746.5,-166 746.5,-187 759.5,-187 759.5,-166 746.5,-166\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"749.5\" y=\"-172.8\">0</text>\n",
-       "<polygon fill=\"#ffff00\" points=\"759.5,-166 759.5,-187 772.5,-187 772.5,-166 759.5,-166\" stroke=\"transparent\"/>\n",
-       "<polygon fill=\"none\" points=\"759.5,-166 759.5,-187 772.5,-187 772.5,-166 759.5,-166\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"762.5\" y=\"-172.8\">1</text>\n",
-       "<polygon fill=\"none\" points=\"772.5,-166 772.5,-187 793.5,-187 793.5,-166 772.5,-166\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"776\" y=\"-172.8\">#3</text>\n",
-       "<polygon fill=\"#ffff00\" points=\"793.5,-166 793.5,-187 806.5,-187 806.5,-166 793.5,-166\" stroke=\"transparent\"/>\n",
-       "<polygon fill=\"none\" points=\"793.5,-166 793.5,-187 806.5,-187 806.5,-166 793.5,-166\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"796.5\" y=\"-172.8\">0</text>\n",
-       "<polygon fill=\"#ffff00\" points=\"806.5,-166 806.5,-187 819.5,-187 819.5,-166 806.5,-166\" stroke=\"transparent\"/>\n",
-       "<polygon fill=\"none\" points=\"806.5,-166 806.5,-187 819.5,-187 819.5,-166 806.5,-166\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"809.5\" y=\"-172.8\">1</text>\n",
-       "<polygon fill=\"#ffff00\" points=\"819.5,-166 819.5,-187 832.5,-187 832.5,-166 819.5,-166\" stroke=\"transparent\"/>\n",
-       "<polygon fill=\"none\" points=\"819.5,-166 819.5,-187 832.5,-187 832.5,-166 819.5,-166\" stroke=\"#000000\"/>\n",
-       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"822.5\" y=\"-172.8\">2</text>\n",
+       "<polygon fill=\"#ffc0cb\" points=\"634.5,-187 634.5,-208 683.5,-208 683.5,-187 634.5,-187\" stroke=\"transparent\"/>\n",
+       "<polyline fill=\"none\" points=\"634.5,-187 683.5,-187 \" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"645\" y=\"-193.8\">dests</text>\n",
+       "<polygon fill=\"#ffc0cb\" points=\"683.5,-187 683.5,-208 704.5,-208 704.5,-187 683.5,-187\" stroke=\"transparent\"/>\n",
+       "<polyline fill=\"none\" points=\"683.5,-187 704.5,-187 \" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"686.5\" y=\"-193.8\">~0</text>\n",
+       "<polyline fill=\"none\" points=\"704.5,-187 717.5,-187 \" stroke=\"#000000\"/>\n",
+       "<polyline fill=\"none\" points=\"717.5,-187 730.5,-187 \" stroke=\"#000000\"/>\n",
+       "<polygon fill=\"#ffc0cb\" points=\"730.5,-187 730.5,-208 751.5,-208 751.5,-187 730.5,-187\" stroke=\"transparent\"/>\n",
+       "<polyline fill=\"none\" points=\"730.5,-187 751.5,-187 \" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"733.5\" y=\"-193.8\">~3</text>\n",
+       "<polyline fill=\"none\" points=\"751.5,-187 764.5,-187 \" stroke=\"#000000\"/>\n",
+       "<polyline fill=\"none\" points=\"764.5,-187 777.5,-187 \" stroke=\"#000000\"/>\n",
+       "<polygon fill=\"#ffc0cb\" points=\"777.5,-187 777.5,-208 798.5,-208 798.5,-187 777.5,-187\" stroke=\"transparent\"/>\n",
+       "<polyline fill=\"none\" points=\"777.5,-187 798.5,-187 \" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"780.5\" y=\"-193.8\">~6</text>\n",
+       "<polyline fill=\"none\" points=\"798.5,-187 811.5,-187 \" stroke=\"#000000\"/>\n",
+       "<polyline fill=\"none\" points=\"811.5,-187 824.5,-187 \" stroke=\"#000000\"/>\n",
+       "<polyline fill=\"none\" points=\"824.5,-187 837.5,-187 \" stroke=\"#000000\"/>\n",
+       "<polygon fill=\"none\" points=\"634.5,-166 634.5,-187 683.5,-187 683.5,-166 634.5,-166\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"637.5\" y=\"-172.8\">#cnt/dst</text>\n",
+       "<polygon fill=\"none\" points=\"683.5,-166 683.5,-187 704.5,-187 704.5,-166 683.5,-166\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"687\" y=\"-172.8\">#2</text>\n",
+       "<polygon fill=\"#ffff00\" points=\"704.5,-166 704.5,-187 717.5,-187 717.5,-166 704.5,-166\" stroke=\"transparent\"/>\n",
+       "<polygon fill=\"none\" points=\"704.5,-166 704.5,-187 717.5,-187 717.5,-166 704.5,-166\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"707.5\" y=\"-172.8\">0</text>\n",
+       "<polygon fill=\"#ffff00\" points=\"717.5,-166 717.5,-187 730.5,-187 730.5,-166 717.5,-166\" stroke=\"transparent\"/>\n",
+       "<polygon fill=\"none\" points=\"717.5,-166 717.5,-187 730.5,-187 730.5,-166 717.5,-166\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"720.5\" y=\"-172.8\">3</text>\n",
+       "<polygon fill=\"none\" points=\"730.5,-166 730.5,-187 751.5,-187 751.5,-166 730.5,-166\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"734\" y=\"-172.8\">#2</text>\n",
+       "<polygon fill=\"#ffff00\" points=\"751.5,-166 751.5,-187 764.5,-187 764.5,-166 751.5,-166\" stroke=\"transparent\"/>\n",
+       "<polygon fill=\"none\" points=\"751.5,-166 751.5,-187 764.5,-187 764.5,-166 751.5,-166\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"754.5\" y=\"-172.8\">0</text>\n",
+       "<polygon fill=\"#ffff00\" points=\"764.5,-166 764.5,-187 777.5,-187 777.5,-166 764.5,-166\" stroke=\"transparent\"/>\n",
+       "<polygon fill=\"none\" points=\"764.5,-166 764.5,-187 777.5,-187 777.5,-166 764.5,-166\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"767.5\" y=\"-172.8\">1</text>\n",
+       "<polygon fill=\"none\" points=\"777.5,-166 777.5,-187 798.5,-187 798.5,-166 777.5,-166\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"781\" y=\"-172.8\">#3</text>\n",
+       "<polygon fill=\"#ffff00\" points=\"798.5,-166 798.5,-187 811.5,-187 811.5,-166 798.5,-166\" stroke=\"transparent\"/>\n",
+       "<polygon fill=\"none\" points=\"798.5,-166 798.5,-187 811.5,-187 811.5,-166 798.5,-166\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"801.5\" y=\"-172.8\">0</text>\n",
+       "<polygon fill=\"#ffff00\" points=\"811.5,-166 811.5,-187 824.5,-187 824.5,-166 811.5,-166\" stroke=\"transparent\"/>\n",
+       "<polygon fill=\"none\" points=\"811.5,-166 811.5,-187 824.5,-187 824.5,-166 811.5,-166\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"814.5\" y=\"-172.8\">1</text>\n",
+       "<polygon fill=\"#ffff00\" points=\"824.5,-166 824.5,-187 837.5,-187 837.5,-166 824.5,-166\" stroke=\"transparent\"/>\n",
+       "<polygon fill=\"none\" points=\"824.5,-166 824.5,-187 837.5,-187 837.5,-166 824.5,-166\" stroke=\"#000000\"/>\n",
+       "<text fill=\"#000000\" font-family=\"Times,serif\" font-size=\"14.00\" text-anchor=\"start\" x=\"827.5\" y=\"-172.8\">2</text>\n",
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        "<!-- meta -->\n",
        "<g class=\"node\" id=\"node4\">\n",
@@ -5302,7 +5302,7 @@
        "</svg>\n"
       ],
       "text/plain": [
-       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f7e3c3cf030> >"
+       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f349c661510> >"
       ]
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      "metadata": {},
@@ -5593,7 +5593,7 @@
        "</svg>\n"
       ],
       "text/plain": [
-       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f7e3c3cf030> >"
+       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f349c661510> >"
       ]
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      "metadata": {},