org: Update results to new output

The dotty output changed to be horizontal, and also
the acceptance sets are now numbers.

* doc/org/dstar2tgba.org, doc/org/ltl2tgba.org, doc/org/ltl2tgta.org,
doc/org/satmin.org: Adjust these four.

doc/org/dstar2tgba.org

@@ -74,17 +74,18 @@ dstar2tgba -B fagfb
 #+RESULTS:
 #+begin_example
 digraph G {
-  0 [label="", style=invis, height=0]
-  0 -> 1
-  1 [label="1"]
-  1 -> 2 [label="a\n"]
-  1 -> 1 [label="!a\n"]
-  2 [label="2", peripheries=2]
-  2 -> 2 [label="b\n{Acc[1]}"]
-  2 -> 3 [label="!b\n{Acc[1]}"]
-  3 [label="3"]
-  3 -> 2 [label="b\n"]
-  3 -> 3 [label="!b\n"]
+  rankdir=LR
+  I [label="", style=invis, width=0]
+  I -> 0
+  0 [label="0"]
+  0 -> 0 [label="!a"]
+  0 -> 1 [label="a"]
+  1 [label="1", peripheries=2]
+  1 -> 1 [label="b"]
+  1 -> 2 [label="!b"]
+  2 [label="2"]
+  2 -> 1 [label="b"]
+  2 -> 2 [label="!b"]
 }
 #+end_example
 
@@ -97,17 +98,18 @@ dstar2tgba -B fagfb | sed 's/\\/\\\\/'
 #+RESULTS: fagfb2ba
 #+begin_example
 digraph G {
-  0 [label="", style=invis, height=0]
-  0 -> 1
-  1 [label="1"]
-  1 -> 2 [label="a\\n"]
-  1 -> 1 [label="!a\\n"]
-  2 [label="2", peripheries=2]
-  2 -> 2 [label="b\\n{Acc[1]}"]
-  2 -> 3 [label="!b\\n{Acc[1]}"]
-  3 [label="3"]
-  3 -> 2 [label="b\\n"]
-  3 -> 3 [label="!b\\n"]
+  rankdir=LR
+  I [label="", style=invis, width=0]
+  I -> 0
+  0 [label="0"]
+  0 -> 0 [label="!a"]
+  0 -> 1 [label="a"]
+  1 [label="1", peripheries=2]
+  1 -> 1 [label="b"]
+  1 -> 2 [label="!b"]
+  2 [label="2"]
+  2 -> 1 [label="b"]
+  2 -> 2 [label="!b"]
 }
 #+end_example
 
@@ -127,8 +129,8 @@ dstar2tgba -s fagfb
 never {
 T0_init:
   if
-  :: ((a)) -> goto accept_S2
   :: ((!(a))) -> goto T0_init
+  :: ((a)) -> goto accept_S2
   fi;
 accept_S2:
   if
@@ -199,15 +201,16 @@ dstar2tgba gfagfb
 #+RESULTS:
 #+begin_example
 digraph G {
-  0 [label="", style=invis, height=0]
-  0 -> 1
+  rankdir=LR
+  I [label="", style=invis, width=0]
+  I -> 0
+  0 [label="0"]
+  0 -> 1 [label="1"]
   1 [label="1"]
-  1 -> 2 [label="1\n"]
-  2 [label="2"]
-  2 -> 2 [label="a & b\n{Acc[\"1\"], Acc[\"0\"]}"]
-  2 -> 2 [label="b & !a\n{Acc[\"1\"]}"]
-  2 -> 2 [label="a & !b\n{Acc[\"0\"]}"]
-  2 -> 2 [label="!a & !b\n"]
+  1 -> 1 [label="!a & !b"]
+  1 -> 1 [label="a & !b\n{0}"]
+  1 -> 1 [label="!a & b\n{1}"]
+  1 -> 1 [label="a & b\n{0,1}"]
 }
 #+end_example
 
@@ -218,15 +221,16 @@ dstar2tgba gfagfb | sed 's/\\/\\\\/g'
 #+RESULTS: gfagfb2ba
 #+begin_example
 digraph G {
-  0 [label="", style=invis, height=0]
-  0 -> 1
+  rankdir=LR
+  I [label="", style=invis, width=0]
+  I -> 0
+  0 [label="0"]
+  0 -> 1 [label="1"]
   1 [label="1"]
-  1 -> 2 [label="1\\n"]
-  2 [label="2"]
-  2 -> 2 [label="a & b\\n{Acc[\\"1\\"], Acc[\\"0\\"]}"]
-  2 -> 2 [label="b & !a\\n{Acc[\\"1\\"]}"]
-  2 -> 2 [label="a & !b\\n{Acc[\\"0\\"]}"]
-  2 -> 2 [label="!a & !b\\n"]
+  1 -> 1 [label="!a & !b"]
+  1 -> 1 [label="a & !b\\n{0}"]
+  1 -> 1 [label="!a & b\\n{1}"]
+  1 -> 1 [label="a & b\\n{0,1}"]
 }
 #+end_example
 
@@ -293,25 +297,36 @@ dstar2tgba --help | sed -n '/Optimization level:/,/^$/p' | sed '1d;$d'
 For instance using =-a --low= will skip any optional post-processing,
 should you find =dstar2tgba= too slow.
 
-Finally, the output format can be changed with the following options:
+Finally, the output format can be changed with the following
+[[file:oaout.org][common ouput options]]:
 #+BEGIN_SRC sh :results verbatim :exports results
 dstar2tgba --help | sed -n '/Output format:/,/^$/p' | sed '1d;$d'
 #+END_SRC
 #+RESULTS:
-:   -8, --utf8                 enable UTF-8 characters in output (ignored with
-:                              --lbtt or --spin)
-:       --dot                  GraphViz's format (default)
-:       --lbtt[=t]             LBTT's format (add =t to force transition-based
-:                              acceptance even on Büchi automata)
-:   -s, --spin                 Spin neverclaim (implies --ba)
-:       --spot                 SPOT's format
-:       --stats=FORMAT         output statistics about the automaton
+#+begin_example
+  -8, --utf8                 enable UTF-8 characters in output (ignored with
+                             --lbtt or --spin)
+      --dot[=c|h|n|N|s|t|v]  GraphViz's format (default).  Add letters to chose
+                             (c) circular nodes, (h) horizontal layout, (v)
+                             vertical layout, (n) with name, (N) without name,
+                             (s) with SCCs, (t) always transition-based
+                             acceptance.
+  -H, --hoaf[=s|t|m|l]       Output the automaton in HOA format.  Add letters
+                             to select (s) state-based acceptance, (t)
+                             transition-based acceptance, (m) mixed acceptance,
+                             (l) single-line output
+      --lbtt[=t]             LBTT's format (add =t to force transition-based
+                             acceptance even on Büchi automata)
+      --name=FORMAT          set the name of the output automaton
+  -s, --spin                 Spin neverclaim (implies --ba)
+      --spot                 SPOT's format
+      --stats=FORMAT         output statistics about the automaton
+#+end_example
 
 The =--stats= options can output statistics about the input and the
 output automaton, so it can be useful to search for particular
 pattern.
 
-
 For instance here is a complex command that will
 
 1. generate an infinite stream of random LTL formulas with [[file:randltl.org][=randltl=]],
@@ -333,7 +348,7 @@ output (Büchi) automaton, =%d=, whether the output automaton is
 deterministic, and =%p= whether the automaton is complete.
 
 #+BEGIN_SRC sh :results verbatim :exports both
-randltl -n -1 --tree-size=10..15 a b c |
+randltl -n -1 --tree-size=10..14 a b c |
 ltlfilt --remove-wm -r -u --size-min=3 |
 head -n 10 |
 while read f; do
@@ -346,26 +361,26 @@ done
 
 #+RESULTS:
 #+begin_example
-F(a | !b)
-  DRA: 2st.; BA: 2st.; det.? 1; complete? 1
-Fa | (Xc U (c & Xc))
-  DRA: 5st.; BA: 5st.; det.? 1; complete? 1
-X(((!b & XGc) | (b & XF!c)) U (!a & ((!b & XGc) | (b & XF!c))))
-  DRA: 8st.; BA: 7st.; det.? 1; complete? 0
-!b | !a
+c U (c & (a | b | (Xc U (a & Xc))))
   DRA: 3st.; BA: 2st.; det.? 1; complete? 0
-F!a
-  DRA: 2st.; BA: 2st.; det.? 1; complete? 1
-F(Ga R (b | Ga))
-  DRA: 10st.; BA: 10st.; det.? 0; complete? 0
-!c U (!c & !a)
+!b | F!c
+  DRA: 3st.; BA: 3st.; det.? 1; complete? 1
+(!a R F!b) R !b
+  DRA: 6st.; BA: 5st.; det.? 1; complete? 0
+b U !c
   DRA: 3st.; BA: 2st.; det.? 1; complete? 0
-!c | FGb
-  DRA: 4st.; BA: 5st.; det.? 0; complete? 0
-G(c U a)
+GFc
+  DRA: 3st.; BA: 3st.; det.? 1; complete? 1
+(F!c U a) R !a
+  DRA: 6st.; BA: 5st.; det.? 1; complete? 0
+b | G!b
   DRA: 4st.; BA: 3st.; det.? 1; complete? 0
-c & Gb
-  DRA: 3st.; BA: 2st.; det.? 1; complete? 0
+!a R (!c & (!a | (F!b U (!a & F!b))))
+  DRA: 5st.; BA: 4st.; det.? 1; complete? 0
+F(a & !b & G!c)
+  DRA: 2st.; BA: 3st.; det.? 0; complete? 0
+GF!c
+  DRA: 3st.; BA: 3st.; det.? 1; complete? 1
 #+end_example
 
 An important point you should be aware of when comparing these numbers

doc/org/ltl2tgta.org

@@ -23,22 +23,22 @@ ltl2tgta --ta --multiple-init 'a U Gb'
 #+begin_example
 digraph G {
   -1  [label="", style=invis, height=0]
-  -1 -> 1 [label="a & b"]
+  -1 -> 1 [label="!a & b"]
   -2  [label="", style=invis, height=0]
-  -2 -> 2 [label="a & !b"]
+  -2 -> 2 [label="a & b"]
   -3  [label="", style=invis, height=0]
-  -3 -> 3 [label="b & !a"]
-  1 [label="0\na & b",shape=box]
-  1 -> 3 [label="{a}\n"]
-  1 -> 2 [label="{b}\n"]
+  -3 -> 3 [label="a & !b"]
+  1 [label="2\n!a & b",shape=box]
   1 -> 4 [label="{a}\n"]
-  2 [label="1\na & !b"]
-  2 -> 1 [label="{b}\n"]
-  2 -> 3 [label="{a, b}\n"]
-  3 [label="2\nb & !a",shape=box]
-  3 -> 4 [label="{a}\n"]
+  2 [label="1\na & b",shape=box]
+  2 -> 4 [label="{a}\n"]
+  2 -> 1 [label="{a}\n"]
+  2 -> 3 [label="{b}\n"]
+  3 [label="0\na & !b"]
+  3 -> 2 [label="{b}\n"]
+  3 -> 1 [label="{a, b}\n"]
   4 [label="3",peripheries=2,shape=box]
-  4 -> 4 [label="{a}\n{Acc[1]}"]
+  4 -> 4 [label="{a}\n{0}"]
 }
 #+end_example
 
@@ -50,22 +50,22 @@ ltl2tgta --ta --multiple-init 'a U Gb' | sed 's/\\/\\\\/'
 #+begin_example
 digraph G {
   -1  [label="", style=invis, height=0]
-  -1 -> 1 [label="a & !b"]
+  -1 -> 1 [label="!a & b"]
   -2  [label="", style=invis, height=0]
-  -2 -> 2 [label="b & !a"]
+  -2 -> 2 [label="a & b"]
   -3  [label="", style=invis, height=0]
-  -3 -> 3 [label="a & b"]
-  1 [label="2\\na & !b"]
-  1 -> 3 [label="{b}\\n"]
-  1 -> 2 [label="{a, b}\\n"]
-  2 [label="0\\nb & !a",shape=box]
+  -3 -> 3 [label="a & !b"]
+  1 [label="2\\n!a & b",shape=box]
+  1 -> 4 [label="{a}\\n"]
+  2 [label="1\\na & b",shape=box]
   2 -> 4 [label="{a}\\n"]
-  3 [label="1\\na & b",shape=box]
-  3 -> 2 [label="{a}\\n"]
-  3 -> 1 [label="{b}\\n"]
-  3 -> 4 [label="{a}\\n"]
+  2 -> 1 [label="{a}\\n"]
+  2 -> 3 [label="{b}\\n"]
+  3 [label="0\\na & !b"]
+  3 -> 2 [label="{b}\\n"]
+  3 -> 1 [label="{a, b}\\n"]
   4 [label="3",peripheries=2,shape=box]
-  4 -> 4 [label="{a}\\n{Acc[1]}"]
+  4 -> 4 [label="{a}\\n{0}"]
 }
 #+end_example
 
@@ -104,7 +104,7 @@ digraph G {
   0 [label="", style=invis, height=0]
   0 -> 1
   1 [label=init]
-  1 -> 2 [label="b & !a\n"]
+  1 -> 2 [label="!a & b\n"]
   1 -> 3 [label="a & b\n"]
   1 -> 4 [label="a & !b\n"]
   2 [label="2",shape=box]
@@ -117,7 +117,7 @@ digraph G {
   4 -> 3 [label="{b}\n"]
   4 -> 2 [label="{a, b}\n"]
   5 [label="4",peripheries=2,shape=box]
-  5 -> 5 [label="{a}\n{Acc[1]}"]
+  5 -> 5 [label="{a}\n{0}"]
 }
 #+end_example
 
@@ -131,20 +131,20 @@ digraph G {
   0 [label="", style=invis, height=0]
   0 -> 1
   1 [label=init]
-  1 -> 2 [label="b & !a\\n"]
+  1 -> 2 [label="!a & b\\n"]
   1 -> 3 [label="a & b\\n"]
   1 -> 4 [label="a & !b\\n"]
   2 [label="2",shape=box]
   2 -> 5 [label="{a}\\n"]
   3 [label="3",shape=box]
+  3 -> 5 [label="{a}\\n"]
   3 -> 2 [label="{a}\\n"]
   3 -> 4 [label="{b}\\n"]
-  3 -> 5 [label="{a}\\n"]
   4 [label="1"]
   4 -> 3 [label="{b}\\n"]
   4 -> 2 [label="{a, b}\\n"]
   5 [label="4",peripheries=2,shape=box]
-  5 -> 5 [label="{a}\\n{Acc[1]}"]
+  5 -> 5 [label="{a}\\n{0}"]
 }
 #+end_example
 
@@ -157,7 +157,7 @@ $txt
 The =--gba= option can be used to request a Generalized Testing
 Automaton, i.e., a Testing Automaton with Generalized Büchi
 acceptance.  In that case double-enclosures are not used anymore, and
-Büchi accepting transitions are marked with the same ={Acc[x],Acc[y]}=
+Büchi accepting transitions are marked with the same ={0,1}=
 notation used in TGBA.
 
 #+BEGIN_SRC sh :results verbatim :exports code
@@ -170,22 +170,22 @@ digraph G {
   0 -> 1
   1 [label=init]
   1 -> 2 [label="a & b\n"]
-  1 -> 3 [label="b & !a\n"]
+  1 -> 3 [label="!a & b\n"]
   1 -> 4 [label="a & !b\n"]
-  1 -> 5 [label="!b & !a\n"]
+  1 -> 5 [label="!a & !b\n"]
   2 [label="1",shape=box]
-  2 -> 3 [label="{a}\n{Acc[b], Acc[a]}"]
-  2 -> 4 [label="{b}\n{Acc[b], Acc[a]}"]
-  2 -> 5 [label="{a, b}\n{Acc[b], Acc[a]}"]
-  3 [label="4"]
-  3 -> 2 [label="{a}\n{Acc[b]}"]
-  3 -> 4 [label="{a, b}\n{Acc[b]}"]
-  3 -> 5 [label="{b}\n{Acc[b]}"]
+  2 -> 3 [label="{a}\n{0,1}"]
+  2 -> 4 [label="{b}\n{0,1}"]
+  2 -> 5 [label="{a, b}\n{0,1}"]
+  3 [label="3"]
+  3 -> 2 [label="{a}\n{1}"]
+  3 -> 4 [label="{a, b}\n{1}"]
+  3 -> 5 [label="{b}\n{1}"]
   4 [label="2"]
-  4 -> 2 [label="{b}\n{Acc[a]}"]
-  4 -> 3 [label="{a, b}\n{Acc[a]}"]
-  4 -> 5 [label="{a}\n{Acc[a]}"]
-  5 [label="3"]
+  4 -> 2 [label="{b}\n{0}"]
+  4 -> 3 [label="{a, b}\n{0}"]
+  4 -> 5 [label="{a}\n{0}"]
+  5 [label="4"]
   5 -> 2 [label="{a, b}\n"]
   5 -> 3 [label="{b}\n"]
   5 -> 4 [label="{a}\n"]
@@ -203,22 +203,22 @@ digraph G {
   0 -> 1
   1 [label=init]
   1 -> 2 [label="a & b\\n"]
-  1 -> 3 [label="b & !a\\n"]
+  1 -> 3 [label="!a & b\\n"]
   1 -> 4 [label="a & !b\\n"]
-  1 -> 5 [label="!b & !a\\n"]
+  1 -> 5 [label="!a & !b\\n"]
   2 [label="1",shape=box]
-  2 -> 3 [label="{a}\\n{Acc[b], Acc[a]}"]
-  2 -> 4 [label="{b}\\n{Acc[b], Acc[a]}"]
-  2 -> 5 [label="{a, b}\\n{Acc[b], Acc[a]}"]
-  3 [label="4"]
-  3 -> 2 [label="{a}\\n{Acc[b]}"]
-  3 -> 4 [label="{a, b}\\n{Acc[b]}"]
-  3 -> 5 [label="{b}\\n{Acc[b]}"]
+  2 -> 3 [label="{a}\\n{0,1}"]
+  2 -> 4 [label="{b}\\n{0,1}"]
+  2 -> 5 [label="{a, b}\\n{0,1}"]
+  3 [label="3"]
+  3 -> 2 [label="{a}\\n{1}"]
+  3 -> 4 [label="{a, b}\\n{1}"]
+  3 -> 5 [label="{b}\\n{1}"]
   4 [label="2"]
-  4 -> 2 [label="{b}\\n{Acc[a]}"]
-  4 -> 3 [label="{a, b}\\n{Acc[a]}"]
-  4 -> 5 [label="{a}\\n{Acc[a]}"]
-  5 [label="3"]
+  4 -> 2 [label="{b}\\n{0}"]
+  4 -> 3 [label="{a, b}\\n{0}"]
+  4 -> 5 [label="{a}\\n{0}"]
+  5 [label="4"]
   5 -> 2 [label="{a, b}\\n"]
   5 -> 3 [label="{b}\\n"]
   5 -> 4 [label="{a}\\n"]
@@ -233,7 +233,7 @@ $txt
 
 The interpretation is similar to that of the TA.  Execution that
 stutter in a livelock-accepting (square) state are accepting as well
-as execution that visit the =Acc[a]= and =Acc[b]= acceptance sets
+as execution that visit the =0= and =1= acceptance sets
 infinitely often.  Those acceptance sets are carried by transitions,
 as in TGBAs.
 
@@ -252,23 +252,23 @@ digraph G {
   0 -> 1
   1 [label=init]
   1 -> 2 [label="a & b\n"]
-  1 -> 3 [label="b & !a\n"]
+  1 -> 3 [label="!a & b\n"]
   1 -> 4 [label="a & !b\n"]
-  1 -> 5 [label="!b & !a\n"]
+  1 -> 5 [label="!a & !b\n"]
   2 [label="3"]
-  2 -> 3 [label="{a}\n{Acc[b], Acc[a]}"]
-  2 -> 4 [label="{b}\n{Acc[b], Acc[a]}"]
-  2 -> 5 [label="{a, b}\n{Acc[b], Acc[a]}"]
-  2 -> 2 [label="{}\n{Acc[b], Acc[a]}"]
-  3 [label="4"]
-  3 -> 2 [label="{a}\n{Acc[b]}"]
-  3 -> 4 [label="{a, b}\n{Acc[b]}"]
-  3 -> 5 [label="{b}\n{Acc[b]}"]
+  2 -> 3 [label="{a}\n{0,1}"]
+  2 -> 4 [label="{b}\n{0,1}"]
+  2 -> 5 [label="{a, b}\n{0,1}"]
+  2 -> 2 [label="{}\n{0,1}"]
+  3 [label="2"]
+  3 -> 2 [label="{a}\n{1}"]
+  3 -> 4 [label="{a, b}\n{1}"]
+  3 -> 5 [label="{b}\n{1}"]
   3 -> 3 [label="{}\n"]
-  4 [label="2"]
-  4 -> 2 [label="{b}\n{Acc[a]}"]
-  4 -> 3 [label="{a, b}\n{Acc[a]}"]
-  4 -> 5 [label="{a}\n{Acc[a]}"]
+  4 [label="4"]
+  4 -> 2 [label="{b}\n{0}"]
+  4 -> 3 [label="{a, b}\n{0}"]
+  4 -> 5 [label="{a}\n{0}"]
   4 -> 4 [label="{}\n"]
   5 [label="1"]
   5 -> 2 [label="{a, b}\n"]
@@ -289,25 +289,25 @@ digraph G {
   0 -> 1
   1 [label=init]
   1 -> 2 [label="a & b\\n"]
-  1 -> 3 [label="b & !a\\n"]
+  1 -> 3 [label="!a & b\\n"]
   1 -> 4 [label="a & !b\\n"]
-  1 -> 5 [label="!b & !a\\n"]
-  2 [label="1"]
-  2 -> 3 [label="{a}\\n{Acc[b], Acc[a]}"]
-  2 -> 4 [label="{b}\\n{Acc[b], Acc[a]}"]
-  2 -> 5 [label="{a, b}\\n{Acc[b], Acc[a]}"]
-  2 -> 2 [label="{}\\n{Acc[b], Acc[a]}"]
-  3 [label="4"]
-  3 -> 2 [label="{a}\\n{Acc[b]}"]
-  3 -> 4 [label="{a, b}\\n{Acc[b]}"]
-  3 -> 5 [label="{b}\\n{Acc[b]}"]
+  1 -> 5 [label="!a & !b\\n"]
+  2 [label="3"]
+  2 -> 3 [label="{a}\\n{0,1}"]
+  2 -> 4 [label="{b}\\n{0,1}"]
+  2 -> 5 [label="{a, b}\\n{0,1}"]
+  2 -> 2 [label="{}\\n{0,1}"]
+  3 [label="2"]
+  3 -> 2 [label="{a}\\n{1}"]
+  3 -> 4 [label="{a, b}\\n{1}"]
+  3 -> 5 [label="{b}\\n{1}"]
   3 -> 3 [label="{}\\n"]
-  4 [label="3"]
-  4 -> 2 [label="{b}\\n{Acc[a]}"]
-  4 -> 3 [label="{a, b}\\n{Acc[a]}"]
-  4 -> 5 [label="{a}\\n{Acc[a]}"]
+  4 [label="4"]
+  4 -> 2 [label="{b}\\n{0}"]
+  4 -> 3 [label="{a, b}\\n{0}"]
+  4 -> 5 [label="{a}\\n{0}"]
   4 -> 4 [label="{}\\n"]
-  5 [label="2"]
+  5 [label="1"]
   5 -> 2 [label="{a, b}\\n"]
   5 -> 3 [label="{b}\\n"]
   5 -> 4 [label="{a}\\n"]

doc/org/satmin.org

@@ -103,28 +103,27 @@ ltl2tgba -D -x sat-minimize "GF(a <-> XXb)"
 #+RESULTS:
 #+begin_example
 digraph G {
-  0 [label="", style=invis, height=0]
-  0 -> 1
+  rankdir=LR
+  I [label="", style=invis, width=0]
+  I -> 0
+  0 [label="0"]
+  0 -> 1 [label="!b\n{0}"]
+  0 -> 1 [label="a & b"]
+  0 -> 2 [label="!a & b"]
   1 [label="1"]
-  1 -> 1 [label="a & !b\n"]
-  1 -> 2 [label="!b & !a\n"]
-  1 -> 2 [label="b & !a\n{Acc[1]}"]
-  1 -> 3 [label="a & b\n{Acc[1]}"]
+  1 -> 1 [label="a & b\n{0}"]
+  1 -> 1 [label="a & !b"]
+  1 -> 2 [label="!a & !b"]
+  1 -> 3 [label="!a & b\n{0}"]
   2 [label="2"]
-  2 -> 4 [label="!b & !a\n"]
-  2 -> 4 [label="b & !a\n{Acc[1]}"]
-  2 -> 3 [label="a & !b\n"]
-  2 -> 3 [label="a & b\n{Acc[1]}"]
-  3 [label="4"]
-  3 -> 1 [label="a & !b\n{Acc[1]}"]
-  3 -> 1 [label="a & b\n"]
-  3 -> 2 [label="!b & !a\n{Acc[1]}"]
-  3 -> 2 [label="b & !a\n"]
-  4 [label="3"]
-  4 -> 2 [label="!b & !a\n{Acc[1]}"]
-  4 -> 4 [label="b & !a\n"]
-  4 -> 3 [label="a & !b\n{Acc[1]}"]
-  4 -> 3 [label="a & b\n"]
+  2 -> 0 [label="a & !b"]
+  2 -> 1 [label="b\n{0}"]
+  2 -> 3 [label="!a & !b"]
+  3 [label="3"]
+  3 -> 0 [label="a & b"]
+  3 -> 0 [label="a & !b\n{0}"]
+  3 -> 3 [label="!a & b"]
+  3 -> 3 [label="!a & !b\n{0}"]
 }
 #+end_example
 
@@ -135,28 +134,27 @@ ltl2tgba -D -x sat-minimize "GF(a <-> XXb)" | sed 's/\\/\\\\/'
 #+RESULTS: gfaexxb3
 #+begin_example
 digraph G {
-  0 [label="", style=invis, height=0]
-  0 -> 1
+  rankdir=LR
+  I [label="", style=invis, width=0]
+  I -> 0
+  0 [label="0"]
+  0 -> 1 [label="!b\\n{0}"]
+  0 -> 1 [label="a & b"]
+  0 -> 2 [label="!a & b"]
   1 [label="1"]
-  1 -> 1 [label="a & !b\\n"]
-  1 -> 1 [label="a & b\\n{Acc[1]}"]
-  1 -> 2 [label="!b & !a\\n"]
-  1 -> 2 [label="b & !a\\n{Acc[1]}"]
+  1 -> 1 [label="a & b\\n{0}"]
+  1 -> 1 [label="a & !b"]
+  1 -> 2 [label="!a & !b"]
+  1 -> 3 [label="!a & b\\n{0}"]
   2 [label="2"]
-  2 -> 3 [label="!b & !a\\n"]
-  2 -> 3 [label="b & !a\\n{Acc[1]}"]
-  2 -> 4 [label="a & !b\\n"]
-  2 -> 4 [label="a & b\\n{Acc[1]}"]
+  2 -> 0 [label="a & !b"]
+  2 -> 1 [label="b\\n{0}"]
+  2 -> 3 [label="!a & !b"]
   3 [label="3"]
-  3 -> 1 [label="a & !b\\n{Acc[1]}"]
-  3 -> 3 [label="b & !a\\n"]
-  3 -> 4 [label="!b & !a\\n{Acc[1]}"]
-  3 -> 4 [label="a & b\\n"]
-  4 [label="4"]
-  4 -> 1 [label="a & !b\\n{Acc[1]}"]
-  4 -> 1 [label="a & b\\n"]
-  4 -> 2 [label="!b & !a\\n{Acc[1]}"]
-  4 -> 2 [label="b & !a\\n"]
+  3 -> 0 [label="a & b"]
+  3 -> 0 [label="a & !b\\n{0}"]
+  3 -> 3 [label="!a & b"]
+  3 -> 3 [label="!a & !b\\n{0}"]
 }
 #+end_example
 
@@ -177,34 +175,36 @@ ltl2tgba -BD -x sat-minimize "GF(a <-> XXb)"
 #+RESULTS:
 #+begin_example
 digraph G {
-  0 [label="", style=invis, height=0]
-  0 -> 1
-  1 [label="1", peripheries=2]
-  1 -> 2 [label="!a\n{Acc[1]}"]
-  1 -> 3 [label="a & !b\n{Acc[1]}"]
-  1 -> 4 [label="a & b\n{Acc[1]}"]
-  2 [label="2", peripheries=2]
-  2 -> 1 [label="!b & !a\n{Acc[1]}"]
-  2 -> 4 [label="a\n{Acc[1]}"]
-  2 -> 5 [label="b & !a\n{Acc[1]}"]
-  3 [label="4"]
-  3 -> 1 [label="a & b\n"]
-  3 -> 2 [label="b & !a\n"]
-  3 -> 3 [label="a & !b\n"]
-  3 -> 6 [label="!b & !a\n"]
-  4 [label="3"]
-  4 -> 1 [label="!b\n"]
-  4 -> 3 [label="a & b\n"]
-  4 -> 6 [label="b & !a\n"]
-  5 [label="6"]
-  5 -> 1 [label="!b\n"]
-  5 -> 4 [label="a & b\n"]
-  5 -> 5 [label="b & !a\n"]
-  6 [label="5"]
-  6 -> 1 [label="a & b\n"]
-  6 -> 2 [label="b & !a\n"]
-  6 -> 4 [label="a & !b\n"]
-  6 -> 5 [label="!b & !a\n"]
+  rankdir=LR
+  I [label="", style=invis, width=0]
+  I -> 0
+  0 [label="0"]
+  0 -> 0 [label="!a & b"]
+  0 -> 1 [label="!a & !b"]
+  0 -> 2 [label="a & !b"]
+  0 -> 3 [label="a & b"]
+  1 [label="1"]
+  1 -> 0 [label="!a & b\n{0}"]
+  1 -> 2 [label="a & !b\n{0}"]
+  1 -> 3 [label="a & b\n{0}"]
+  1 -> 4 [label="!a & !b\n{0}"]
+  2 [label="2"]
+  2 -> 4 [label="!a\n{0}"]
+  2 -> 5 [label="a\n{0}"]
+  3 [label="3"]
+  3 -> 1 [label="!a & !b"]
+  3 -> 2 [label="a & !b"]
+  3 -> 4 [label="!a & b"]
+  3 -> 5 [label="a & b"]
+  4 [label="4"]
+  4 -> 0 [label="!a & !b"]
+  4 -> 1 [label="!a & b"]
+  4 -> 2 [label="a & b"]
+  4 -> 3 [label="a & !b"]
+  5 [label="5"]
+  5 -> 1 [label="b"]
+  5 -> 4 [label="!a & !b"]
+  5 -> 5 [label="a & !b"]
 }
 #+end_example
 
@@ -215,35 +215,36 @@ ltl2tgba -BD -x sat-minimize "GF(a <-> XXb)" | sed 's/\\/\\\\/'
 #+RESULTS: gfaexxb4
 #+begin_example
 digraph G {
-  0 [label="", style=invis, height=0]