dot: fix #393

* spot/twaalgos/dot.cc: Add support for option 'E', and default to
rectangle nodes for large labels.
* bin/common_aoutput.cc, NEWS: Document it.
* tests/core/alternating.test, tests/core/dstar.test,
tests/core/readsave.test, tests/core/sccdot.test,
tests/core/tgbagraph.test, tests/python/_product_weak.ipynb,
tests/python/alternation.ipynb, tests/python/atva16-fig2b.ipynb,
tests/python/automata.ipynb, tests/python/decompose.ipynb,
tests/python/gen.ipynb, tests/python/highlighting.ipynb,
tests/python/ltsmin-dve.ipynb, tests/python/ltsmin-pml.ipynb,
tests/python/parity.ipynb, tests/python/pdegen.py,
tests/python/satmin.ipynb, tests/python/stutter-inv.ipynb: Adjust all
test cases.

NEWS

@@ -36,6 +36,12 @@ New in spot 2.8.7.dev (not yet released)
   - ltlsynt --algo=lar uses the new version of to_parity() mentionned
     below.  The old version is available via --algo=lar.old
 
+  - The dot printer is now automatically using rectangles with rounded
+    corners for automata states if one state label have five or more
+    characters.  This saves space with very long labels.  Use --dot=c,
+    --dot=e, or --dot=E to force the use of Circles, Ellipses, or
+    rEctangles.
+
   Library:
 
   - Historically, Spot only supports LTL with infinite semantics
@@ -110,6 +116,13 @@ New in spot 2.8.7.dev (not yet released)
     dealing with n-ary operators and isolating subsets of operands
     that can be relabeled as a single term.
 
+  - print_dot() default was changed to use circles for automata with
+    fewer than 10 unamed states, ellipses for automata with up to 1000
+    unamed states (or named states with up to 4 characters), and
+    rounded rectangles otherwise.  Rectangles are also used for
+    automata with acceptance bullets on states.  The new "E" option
+    can be used to force rectangles in all situations.
+
   Backward-incompatible changes:
 
   - iar() and iar_maybe() have been moved from

bin/common_aoutput.cc

@@ -1,5 +1,5 @@
 // -*- coding: utf-8 -*-
-// Copyright (C) 2012-2019 Laboratoire de Recherche et Développement
+// Copyright (C) 2012-2020 Laboratoire de Recherche et Développement
 // de l'Epita (LRDE).
 //
 // This file is part of Spot, a model checking library.
@@ -97,7 +97,7 @@ static const argp_option options[] =
     /**************************************************/
     { nullptr, 0, nullptr, 0, "Output format:", 3 },
     { "dot", 'd',
-      "1|a|A|b|B|c|C(COLOR)|e|f(FONT)|h|k|K|n|N|o|r|R|s|t|u|v|y|+INT|<INT|#",
+      "1|a|A|b|B|c|C(COLOR)|e|E|f(FONT)|h|k|K|n|N|o|r|R|s|t|u|v|y|+INT|<INT|#",
       OPTION_ARG_OPTIONAL,
       "GraphViz's format.  Add letters for "
       "(1) force numbered states, "
@@ -109,6 +109,7 @@ static const argp_option options[] =
       "(C) color nodes with COLOR, "
       "(d) show origins when known, "
       "(e) force elliptic nodes, "
+      "(E) force rEctangular nodes, "
       "(f(FONT)) use FONT, "
       "(g) hide edge labels, "
       "(h) horizontal layout, "

spot/twaalgos/dot.cc

@@ -86,7 +86,9 @@ namespace spot
       acc_cond::mark_t inf_sets_ = {};
       acc_cond::mark_t fin_sets_ = {};
       unsigned opt_shift_sets_ = 0;
-      enum { ShapeAuto = 0, ShapeCircle, ShapeEllipse } opt_shape_ = ShapeAuto;
+      enum { ShapeAuto = 0, ShapeCircle, ShapeEllipse,
+             ShapeRectangle } opt_shape_ = ShapeAuto;
+      const char* extrastyle = "";
       bool opt_force_acc_trans_ = false;
       bool opt_vertical_ = false;
       bool opt_name_ = false;
@@ -254,6 +256,9 @@ namespace spot
             case 'e':
               opt_shape_ = ShapeEllipse;
               break;
+            case 'E':
+              opt_shape_ = ShapeRectangle;
+              break;
             case 'f':
               if (*options != '(')
                 throw std::runtime_error
@@ -495,7 +500,8 @@ namespace spot
           return;
         std::string dest = string_dst(dst, color_num);
         if (univ == 0)
-          os_ << "  " << dest << " [label=<>,shape=point]\n";
+          os_ << "  " << dest
+              << " [label=<>,shape=point,width=0.05,height=0.05]\n";
         if (print_edges)
           {
             for (unsigned d: aut_->univ_dests(dst))
@@ -603,14 +609,18 @@ namespace spot
             os_ << "  node [shape=\"circle\"]\n";
             break;
           case ShapeEllipse:
-            // Do not print anything.  Ellipse is
+            // Ellipse is the default shape used by GraphViz, but
-            // the default shape used by GraphViz.
+            // with set width and height so it's a circle when possible.
+            os_ << "  node [shape=\"ellipse\",width=\"0.5\",height=\"0.5\"]\n";
+            break;
+          case ShapeRectangle:
+            os_ << "  node [shape=\"box\",style=\"rounded\",width=\"0.5\"]\n";
             break;
           case ShapeAuto:
             SPOT_UNREACHABLE();
           }
         if (!opt_node_color_.empty())
-          os_ << "  node [style=\"filled\", fillcolor=\""
+          os_ << "  node [style=\"filled" << extrastyle << "\", fillcolor=\""
               << opt_node_color_ << "\"]\n";
         if (!opt_font_.empty())
           os_ << "  fontname=\"" << opt_font_
@@ -713,7 +723,7 @@ namespace spot
             auto iter = highlight_states_->find(s);
             if (iter != highlight_states_->end())
               {
-                os_ << ", style=\"bold";
+                os_ << ", style=\"bold" << extrastyle;
                 if (!opt_node_color_.empty())
                   os_ << ",filled";
                 os_ << "\", color=\"" << palette[iter->second % palette_mod]
@@ -884,7 +894,8 @@ namespace spot
         if (opt_name_)
           name_ = graph_name_;
         mark_states_ = (!opt_force_acc_trans_
-                        && aut_->prop_state_acc().is_true());
+                        && aut_->prop_state_acc().is_true()
+                        && aut_->num_sets() > 0);
         dcircles_ = (mark_states_
                      && (!opt_bullet || opt_bullet_but_buchi)
                      && (aut_->acc().is_buchi() || aut_->acc().is_co_buchi()));
@@ -892,22 +903,37 @@ namespace spot
           {
             if ((inline_state_names_ && (sn_ || sprod_ || opt_state_labels_))
                 || (opt_state_labels_ && opt_latex_)
-                || aut->num_states() > 100
+                || aut->num_states() > 1000
+                || (mark_states_ && !dcircles_)
                 || orig_)
+              {
+                opt_shape_ = ShapeRectangle;
+                // If all state names are very short, prefer ellipses.
+                if (!opt_state_labels_ && !orig_
+                    && !(mark_states_ && !dcircles_)
+                    && ((sn_ && std::all_of(sn_->begin(), sn_->end(),
+                                            [](const std::string& s)
+                                            { return s.size() <= 4; }))
+                        || (sprod_ && std::all_of(sprod_->begin(),
+                                                  sprod_->end(),
+                                                  [](auto p)
+                                                  {
+                                                    return (p.first < 100
+                                                            && p.second < 100);
+                                                  }))))
+                  opt_shape_ = ShapeEllipse;
+              }
+            else if (aut->num_states() > 10)
               {
                 opt_shape_ = ShapeEllipse;
-                // If all state names are short, prefer circles.
-                if (!opt_state_labels_ && !orig_ &&
-                    sn_ && std::all_of(sn_->begin(), sn_->end(),
-                                       [](const std::string& s)
-                                       { return s.size() <= 2; }))
-                  opt_shape_ = ShapeCircle;
               }
             else
               {
                 opt_shape_ = ShapeCircle;
               }
           }
+        if (opt_shape_ == ShapeRectangle)
+          extrastyle = ",rounded";
         auto si =
           std::unique_ptr<scc_info>(opt_scc_ ? new scc_info(aut) : nullptr);
 

tests/core/alternating.test

@@ -1,7 +1,7 @@
 #!/bin/sh
 # -*- coding: utf-8 -*-
-# Copyright (C) 2016-2018 Laboratoire de Recherche et Développement
+# Copyright (C) 2016-2018, 2020 Laboratoire de Recherche et
-# de l'Epita (LRDE).
+# Développement de l'Epita (LRDE).
 #
 # This file is part of Spot, a model checking library.
 #
@@ -62,6 +62,7 @@ digraph "" {
   rankdir=LR
   label="Fin(⓿)\n[co-Büchi]"
   labelloc="t"
+  node [shape="box",style="rounded",width="0.5"]
   I [label="", style=invis, width=0]
   I -> -11 [arrowhead=onormal]
   subgraph cluster_0 {
@@ -88,7 +89,7 @@ digraph "" {
   color=green
   label=""
   3 [label="GF(b)"]
-  -8 [label=<>,shape=point]
+  -8 [label=<>,shape=point,width=0.05,height=0.05]
   }
   subgraph cluster_5 {
   color=red
@@ -100,15 +101,15 @@ digraph "" {
   label=""
   0 [label="((((a) U (b)) && GF(b)) && FG(a))"]
   }
-  -11 [label=<>,shape=point]
+  -11 [label=<>,shape=point,width=0.05,height=0.05]
   -11 -> 0
   -11 -> 2
   0 -> -1 [label="b", arrowhead=onormal]
-  -1 [label=<>,shape=point]
+  -1 [label=<>,shape=point,width=0.05,height=0.05]
   -1 -> 1
   -1 -> 3
   0 -> -4 [label="a & !b", style=bold, color="#E31A1C", arrowhead=onormal]
-  -4 [label=<>,shape=point]
+  -4 [label=<>,shape=point,width=0.05,height=0.05]
   -4 -> 1 [style=bold, color="#E31A1C"]
   -4 -> 3 [style=bold, color="#E31A1C"]
   -4 -> 5 [style=bold, color="#E31A1C"]
@@ -506,23 +507,23 @@ digraph "" {
   rankdir=LR
   label=<Fin(<font color="#1F78B4">⓿</font>)<br/>[co-Büchi]>
   labelloc="t"
-  node [shape="circle"]
+  node [shape="box",style="rounded",width="0.5"]
   fontname="Lato"
   node [fontname="Lato"]
   edge [fontname="Lato"]
   I [label="", style=invis, width=0]
   I -> -1 [arrowhead=onormal]
-  -1 [label=<>,shape=point]
+  -1 [label=<>,shape=point,width=0.05,height=0.05]
   -1 -> 0
   -1 -> 1
   0 [label=<0>]
   0 -> 0 [label=<!a &amp; !c>]
   0 -> -1.1 [label=<a &amp; b &amp; !c>, style=bold, color="#FF4DA0", $style]
-  -1.1 [label=<>,shape=point]
+  -1.1 [label=<>,shape=point,width=0.05,height=0.05]
   -1.1 -> 0 [style=bold, color="#FF4DA0"]
   -1.1 -> 1 [style=bold, color="#FF4DA0"]
   0 -> -1.2 [label=<a &amp; !c>, style=bold, color="#FF7F00", arrowhead=onormal]
-  -1.2 [label=<>,shape=point]
+  -1.2 [label=<>,shape=point,width=0.05,height=0.05]
   -1.2 -> 0 [style=bold, color="#FF7F00"]
   -1.2 -> 1 [style=bold, color="#FF7F00"]
   1 [label=<1>]
@@ -569,6 +570,7 @@ digraph "SLAA for c R (c | G(a & b) | (F!b & F!a))" {
   rankdir=LR
   label=<Fin($color1) &amp; Fin($color)<br/>[Streett-like 2]>
   labelloc="t"
+  node [shape="box",style="rounded",width="0.5"]
   fontname="Lato"
   node [fontname="Lato"]
   edge [fontname="Lato"]
@@ -598,10 +600,10 @@ digraph "SLAA for c R (c | G(a & b) | (F!b & F!a))" {
   color=green
   label=""
   0 [label=<c R (c | G(a &amp; b) | (F!b &amp; F!a))>]
-  -1 [label=<>,shape=point]
+  -1 [label=<>,shape=point,width=0.05,height=0.05]
-  -4 [label=<>,shape=point]
+  -4 [label=<>,shape=point,width=0.05,height=0.05]
-  -7 [label=<>,shape=point]
+  -7 [label=<>,shape=point,width=0.05,height=0.05]
-  -10 [label=<>,shape=point]
+  -10 [label=<>,shape=point,width=0.05,height=0.05]
   }
   0 -> 4 [label=<c>]
   0 -> 0 [label=<!a &amp; !b &amp; !c>]
@@ -665,6 +667,7 @@ digraph "SLAA for c R (c | G(a & b) | (F!b & F!a))" {
   rankdir=LR
   label=<Fin($color1) &amp; Fin($color)<br/>[Streett-like 2]>
   labelloc="t"
+  node [shape="box",style="rounded",width="0.5"]
   fontname="Lato"
   node [fontname="Lato"]
   edge [fontname="Lato"]
@@ -689,11 +692,11 @@ digraph "SLAA for c R (c | G(a & b) | (F!b & F!a))" {
   color=green
   label=""
   0 [label=<c R (c | G(a &amp; b) | (F!b &amp; F!a))>]
-  -1 [label=<>,shape=point]
+  -1 [label=<>,shape=point,width=0.05,height=0.05]
-  -4 [label=<>,shape=point]
+  -4 [label=<>,shape=point,width=0.05,height=0.05]
-  -7 [label=<>,shape=point]
+  -7 [label=<>,shape=point,width=0.05,height=0.05]
   1 [label=<G(a &amp; b)>]
-  -10 [label=<>,shape=point]
+  -10 [label=<>,shape=point,width=0.05,height=0.05]
   }
   0 -> 4 [label=<c>]
   0 -> 0 [label=<!a &amp; !b &amp; !c>]
@@ -745,7 +748,7 @@ digraph "" {
   rankdir=LR
   label=<Fin(<font color="#1F78B4">⓿</font>)<br/>[co-Büchi]>
   labelloc="t"
-  node [shape="circle"]
+  node [shape="box",style="rounded",width="0.5"]
   fontname="Lato"
   node [fontname="Lato"]
   edge [fontname="Lato"]
@@ -753,14 +756,14 @@ digraph "" {
   I -> 0
   0 [label=<0>]
   0 -> -1.1 [label=<b &amp; c>, style=bold, color="#FF4DA0", arrowhead=onormal]
-  -1.1 [label=<>,shape=point]
+  -1.1 [label=<>,shape=point,width=0.05,height=0.05]
   -1.1 -> 1 [style=bold, color="#FF4DA0"]
   -1.1 -> 2 [style=bold, color="#FF4DA0"]
   1 [label=<1>]
   1 -> -1.1 [label=<a &amp; b>, style=bold, color="#FF4DA0", arrowhead=onormal]
   2 [label=<2>]
   2 -> -1.2 [label=<!a &amp; !b &amp; !c>, style=bold, color="#FF7F00", $style]
-  -1.2 [label=<>,shape=point]
+  -1.2 [label=<>,shape=point,width=0.05,height=0.05]
   -1.2 -> 1 [style=bold, color="#FF7F00"]
   -1.2 -> 2 [style=bold, color="#FF7F00"]
 }
@@ -792,7 +795,7 @@ digraph "" {
   rankdir=LR
   label=<Fin(<font color="#1F78B4">⓿</font>)<br/>[co-Büchi]>
   labelloc="t"
-  node [shape="circle"]
+  node [shape="box",style="rounded",width="0.5"]
   fontname="Lato"
   node [fontname="Lato"]
   edge [fontname="Lato"]
@@ -800,17 +803,17 @@ digraph "" {
   I -> 0
   0 [label=<0>]
   0 -> -1.1 [label=<b &amp; c>, style=bold, color="#FF4DA0", arrowhead=onormal]
-  -1.1 [label=<>,shape=point]
+  -1.1 [label=<>,shape=point,width=0.05,height=0.05]
   -1.1 -> 1 [style=bold, color="#FF4DA0"]
   -1.1 -> 2 [style=bold, color="#FF4DA0"]
   1 [label=<1>]
   1 -> -1.3 [label=<a &amp; b>, style=bold, color="#6A3D9A", arrowhead=onormal]
-  -1.3 [label=<>,shape=point]
+  -1.3 [label=<>,shape=point,width=0.05,height=0.05]
   -1.3 -> 1 [style=bold, color="#6A3D9A"]
   -1.3 -> 2 [style=bold, color="#6A3D9A"]
   2 [label=<2>]
   2 -> -1.2 [label=<!a &amp; !b &amp; !c>, style=bold, color="#FF7F00", $style]
-  -1.2 [label=<>,shape=point]
+  -1.2 [label=<>,shape=point,width=0.05,height=0.05]
   -1.2 -> 1 [style=bold, color="#FF7F00"]
   -1.2 -> 2 [style=bold, color="#FF7F00"]
 }
@@ -848,6 +851,7 @@ digraph "SLAA for G((b & Fa) | (!b & G!a))" {
   rankdir=LR
   label=<Fin(<font color="#1F78B4">⓿</font>)<br/>[co-Büchi]>
   labelloc="t"
+  node [shape="box",style="rounded",width="0.5"]
   fontname="Lato"
   node [fontname="Lato"]
   edge [fontname="Lato"]
@@ -872,8 +876,8 @@ digraph "SLAA for G((b & Fa) | (!b & G!a))" {
   color=green
   label=""
   0 [label=<G((b &amp; Fa) | (!b &amp; G!a))>]
-  -1 [label=<>,shape=point]
+  -1 [label=<>,shape=point,width=0.05,height=0.05]
-  -4 [label=<>,shape=point]
+  -4 [label=<>,shape=point,width=0.05,height=0.05]
   }
   0 -> 0 [label=<a &amp; b>]
   0 -> -1 [label=<!a &amp; b>, arrowhead=onormal]

tests/core/dstar.test

@@ -1,6 +1,6 @@
 #!/bin/sh
 # -*- coding: utf-8 -*-
-# Copyright (C) 2013-2016, 2018 Laboratoire de Recherche et
+# Copyright (C) 2013-2016, 2018, 2020 Laboratoire de Recherche et
 # Développement de l'Epita (LRDE).
 #
 # This file is part of Spot, a model checking library.
@@ -63,7 +63,7 @@ digraph "" {
   rankdir=LR
   label="Fin(0) & Inf(1)\n[Rabin 1]"
   labelloc="t"
-  node [shape="circle"]
+  node [shape="box",style="rounded",width="0.5"]
   I [label="", style=invis, width=0]
   I -> 0
   0 [label="0"]

tests/core/readsave.test

@@ -420,6 +420,7 @@ digraph "G(Fa & Fb)" {
   rankdir=LR
   label=<Inf($zero)&amp;Inf($one)<br/>[gen. Büchi 2]>
   labelloc="t"
+  node [shape="ellipse",width="0.5",height="0.5"]
   fontname="Lato"
   node [fontname="Lato"]
   edge [fontname="Lato"]
@@ -491,6 +492,7 @@ digraph "" {
   rankdir=LR
   label="(Fin(⓿)|Fin(❸)) | (Fin(❶) & Inf(❷))\n[gen. Rabin 3]"
   labelloc="t"
+  node [shape="box",style="rounded",width="0.5"]
   I [label="", style=invis, width=0]
   I -> 0
   0 [label="0"]
@@ -545,7 +547,7 @@ digraph "" {
   rankdir=LR
   label="(Fin(⓿)|Fin(❸)) | (Fin(❶) & Inf(❷))\n[gen. Rabin 3]"
   labelloc="t"
-  node [shape="circle"]
+  node [shape="box",style="rounded",width="0.5"]
   I [label="", style=invis, width=0]
   0 [label="0"]
   1 [label="1\n⓿❸", tooltip="test me"]
@@ -568,7 +570,7 @@ diff out expected2
 cat >expected3 <<EOF
 digraph "" {
   rankdir=LR
-  node [shape="circle"]
+  node [shape="ellipse",width="0.5",height="0.5"]
   I [label="", style=invis, width=0]
   0 [label="6", peripheries=2]
   u0 [label="...", shape=none, width=0, height=0, tooltip="hidden successors"]
@@ -891,6 +893,7 @@ run 0 autfilt -dAk input6 >output6d
 cat >expect6d <<EOF
 digraph "" {
   rankdir=LR
+  node [shape="box",style="rounded",width="0.5"]
   I [label="", style=invis, width=0]
   I -> 1
   0 [label="0\nb"]
@@ -914,6 +917,7 @@ digraph "" {
   rankdir=LR
   label=<Inf(<font color="#1F78B4">⓿</font>)<br/>[Büchi]>
   labelloc="t"
+  node [shape="box",style="rounded",width="0.5"]
   I [label="", style=invis, width=0]
   I -> 1
   0 [label=<0<br/>b>]
@@ -1031,14 +1035,15 @@ autfilt -dA input9 > output9
 cat >expected9 <<EOF
 digraph "a U (b U c)" {
   rankdir=LR
+  node [shape="box",style="rounded",width="0.5"]
   I [label="", style=invis, width=0]
   I -> 2
-  0 [label="0", peripheries=2, style="bold", color="#1F78B4"]
+  0 [label="0", peripheries=2, style="bold,rounded", color="#1F78B4"]
   0 -> 0 [label="1", style=bold, color="#1F78B4"]
   1 [label="1"]
   1 -> 0 [label="c", style=bold, color="#FF4DA0"]
   1 -> 1 [label="b & !c", style=bold, color="#FF7F00"]
-  2 [label="new\nline", style="bold", color="#6A3D9A"]
+  2 [label="new\nline", style="bold,rounded", color="#6A3D9A"]
   2 -> 0 [label="c", style=bold, color="#6A3D9A"]
   2 -> 1 [label="!a & b & !c"]
   2 -> 2 [label="a & !c"]
@@ -1046,12 +1051,13 @@ digraph "a U (b U c)" {
 EOF
 diff output9 expected9
 autfilt -dbar input9 > output9a
-style=', style="bold", color="#1F78B4"'
+style=', style="bold,rounded", color="#1F78B4"'
 cat >expected9a <<EOF
 digraph "a U (b U c)" {
   rankdir=LR
   label=<Inf(<font color="#1F78B4">⓿</font>)<br/>[Büchi]>
   labelloc="t"
+  node [shape="box",style="rounded",width="0.5"]
   I [label="", style=invis, width=0]
   I -> 2
   0 [label=<0<br/><font color="#1F78B4">⓿</font>>$style]
@@ -1059,7 +1065,7 @@ digraph "a U (b U c)" {
   1 [label=<1>]
   1 -> 0 [label=<c>, style=bold, color="#FF4DA0"]
   1 -> 1 [label=<b &amp; !c>, style=bold, color="#FF7F00"]
-  2 [label=<new<br/>line>, style="bold", color="#6A3D9A"]
+  2 [label=<new<br/>line>, style="bold,rounded", color="#6A3D9A"]
   2 -> 0 [label=<c>, style=bold, color="#6A3D9A"]
   2 -> 1 [label=<!a &amp; b &amp; !c>]
   2 -> 2 [label=<a &amp; !c>]
@@ -1097,6 +1103,7 @@ ltl2tgba 'a U b' | autfilt --remove-ap=b=0 --name=%M --dot=dA >out
 cat >expected <<EOF
 digraph "a U b" {
   rankdir=LR
+  node [shape="box",style="rounded",width="0.5"]
   I [label="", style=invis, width=0]
   I -> 0
   0 [label="0 (1)"]

tests/core/sccdot.test

@@ -76,7 +76,7 @@ digraph "" {
   rankdir=LR
   label="(Inf(0)&Inf(1)) & Fin(2)\n[Streett-like 3]"
   labelloc="t"
-  node [shape="circle"]
+  node [shape="ellipse",width="0.5",height="0.5"]
   I [label="", style=invis, width=0]
   I -> 1
   subgraph cluster_0 {

tests/core/tgbagraph.test

@@ -1,7 +1,7 @@
 #!/bin/sh
 # -*- coding: utf-8 -*-
-# Copyright (C) 2014-2018 Laboratoire de Recherche et Développement de
+# Copyright (C) 2014-2018, 2020 Laboratoire de Recherche et
-# l'Epita (LRDE).
+# Développement de l'Epita (LRDE).
 #
 # This file is part of Spot, a model checking library.
 #
@@ -122,6 +122,7 @@ digraph "" {
   rankdir=LR
   label="t\n[Fin-less 2]"
   labelloc="t"
+  node [shape="ellipse",width="0.5",height="0.5"]
   I [label="", style=invis, width=0]
   I -> 0
   0 [label="0"]
@@ -237,7 +238,7 @@ digraph "" {
   rankdir=LR
   label="t\n[all]"
   labelloc="t"
-  node [shape="circle"]
+  node [shape="ellipse",width="0.5",height="0.5"]
   I [label="", style=invis, width=0]
   I -> 2
   0 [label="s1", style="bold", color="#E31A1C"]
@@ -251,7 +252,7 @@ digraph "" {
   rankdir=LR
   label="t\n[all]"
   labelloc="t"
-  node [shape="circle"]
+  node [shape="ellipse",width="0.5",height="0.5"]
   I [label="", style=invis, width=0]
   I -> 0
   0 [label="s3", style="bold", color="#505050"]

tests/python/atva16-fig2b.ipynb

@@ -79,215 +79,239 @@
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+       "<!-- Generated by graphviz version 2.43.0 (0)\n",
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+       "</a>\n",
+       "</g>\n",
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        "</svg>\n"
       ],
       "text/plain": [
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      "execution_count": 4,
@@ -348,7 +372,7 @@
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    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
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tests/python/automata.ipynb

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@@ -733,7 +733,7 @@
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tests/python/gen.ipynb

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tests/python/highlighting.ipynb

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tests/python/ltsmin-pml.ipynb

@@ -38,8 +38,8 @@
       "SpinS Promela Compiler - version 1.1 (3-Feb-2015)\n",
       "(C) University of Twente, Formal Methods and Tools group\n",
       "\n",
-      "Parsing tmpb2gyak36.pml...\n",
+      "Parsing tmpfkmh8g4r.pml...\n",
-      "Parsing tmpb2gyak36.pml done (0.0 sec)\n",
+      "Parsing tmpfkmh8g4r.pml done (0.0 sec)\n",
       "\n",
       "Optimizing graphs...\n",
       "   StateMerging changed 0 states/transitions.\n",
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       "   [..................................................]\n",
       "   [..................................................]\n",
       "   Found          2 /          2 (100.0%) Commuting actions               \n",
-      "Generating guard dependency matrices done (0.1 sec)\n",
+      "Generating guard dependency matrices done (0.0 sec)\n",
       "\n",
-      "Written C code to /home/adl/git/spot/tests/python/tmpb2gyak36.pml.spins.c\n",
+      "Written C code to /home/adl/git/spot/tests/python/tmpfkmh8g4r.pml.spins.c\n",
-      "Compiled C code to PINS library tmpb2gyak36.pml.spins\n",
+      "Compiled C code to PINS library tmpfkmh8g4r.pml.spins\n",
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-       "<polygon fill=\"black\" stroke=\"black\" points=\"1508.27,-104.5 1515.33,-107.52 1510.64,-107.08 1513.01,-109.65 1513.01,-109.65 1513.01,-109.65 1510.64,-107.08 1510.69,-111.79 1508.27,-104.5 1508.27,-104.5\"/>\n",
+       "<polygon fill=\"black\" stroke=\"black\" points=\"1491.01,-107.59 1498.16,-110.38 1493.46,-110.08 1495.91,-112.58 1495.91,-112.58 1495.91,-112.58 1493.46,-110.08 1493.66,-114.79 1491.01,-107.59 1491.01,-107.59\"/>\n",
-       "<text text-anchor=\"start\" x=\"1385.34\" y=\"-137.25\" font-family=\"Lato\" font-size=\"14.00\">!&quot;P_0.a &lt; 2&quot; &amp; &quot;P_0.b &gt; 1&quot; &amp; dead</text>\n",
+       "<text text-anchor=\"start\" x=\"1370.34\" y=\"-137.8\" font-family=\"Lato\" font-size=\"14.00\">!&quot;P_0.a &lt; 2&quot; &amp; &quot;P_0.b &gt; 1&quot; &amp; dead</text>\n",
        "</g>\n",
        "</g>\n",
        "</svg>\n"
@@ -1370,7 +1370,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.7.5"
+   "version": "3.8.2"
   }
  },
  "nbformat": 4,

tests/python/pdegen.py

@@ -334,6 +334,7 @@ assert dot == """digraph "" {
   rankdir=LR
   label="Inf(2) | (Inf(1) & Fin(0))\\n[Rabin-like 2]"
   labelloc="t"
+  node [shape="box",style="rounded",width="0.5"]
   I [label="", style=invis, width=0]
   I -> 0
   0 [label="0 (0)"]