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postproc: add a SBAcc option

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Producing state-based acceptance is now part of the postprocessing
routines.  That means we can more easily simplify automata with
state-based acceptance (using autfilt -S --small --high, for instance)
and as as side-effect, ltl2tgba can produce GBA.  However the result of
ltl2tgba -S is often larger than that of ltl2tgba -B.

* src/twaalgos/postproc.cc, src/twaalgos/postproc.hh: Implement
the SBAcc option.
* src/bin/common_post.cc, src/bin/common_post.hh: Implement -S.
* src/bin/autfilt.cc, src/bin/dstar2tgba.cc, src/bin/ltl2tgba.cc,
src/bin/ltl2tgta.cc, src/bin/ltldo.cc: Adjust.
* src/tests/sim3.test: Augment test case.
* NEWS, doc/org/ltl2tgba.org, doc/org/autfilt.org: Document it -S.
This commit is contained in:
Alexandre Duret-Lutz 2015-05-14 20:04:50 +02:00
parent dd87bdf868
commit 0786e068ae
13 changed files with 181 additions and 42 deletions
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55
doc/org/ltl2tgba.org
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@ -214,6 +214,61 @@ $txt
#+RESULTS:
[[file:dotex2ba-t.png]]
Using option =-S= instead of option =-B= you can obtain generalized
Büchi automata with state-based acceptance. Here is the same formula
as above, for comparison.
#+NAME: dotex2gba
#+BEGIN_SRC sh :results verbatim :exports code
ltl2tgba -S 'GFa & GFb'
#+END_SRC
#+RESULTS: dotex2gba
#+begin_example
digraph G {
rankdir=LR
node [shape="circle"]
fontname="Lato"
node [fontname="Lato"]
edge [fontname="Lato"]
node[style=filled, fillcolor="#ffffa0"] edge[arrowhead=vee, arrowsize=.7]
I [label="", style=invis, width=0]
I -> 0
0 [label=<0<br/><font color="#5DA5DA">⓿</font><font color="#F17CB0">❶</font>>]
0 -> 0 [label=<a &amp; b>]
0 -> 1 [label=<!a &amp; !b>]
0 -> 2 [label=<!a &amp; b>]
0 -> 3 [label=<a &amp; !b>]
1 [label=<1>]
1 -> 0 [label=<a &amp; b>]
1 -> 1 [label=<!a &amp; !b>]
1 -> 2 [label=<!a &amp; b>]
1 -> 3 [label=<a &amp; !b>]
2 [label=<2<br/><font color="#F17CB0">❶</font>>]
2 -> 0 [label=<a &amp; b>]
2 -> 1 [label=<!a &amp; !b>]
2 -> 2 [label=<!a &amp; b>]
2 -> 3 [label=<a &amp; !b>]
3 [label=<3<br/><font color="#5DA5DA">⓿</font>>]
3 -> 0 [label=<a &amp; b>]
3 -> 1 [label=<!a &amp; !b>]
3 -> 2 [label=<!a &amp; b>]
3 -> 3 [label=<a &amp; !b>]
}
#+end_example
#+BEGIN_SRC dot :file dotex2gba.png :cmdline -Tpng :var txt=dotex2gba :exports results
$txt
#+END_SRC
#+RESULTS:
[[file:dotex2gba.png]]
Note that =ltl2tgba= is not very good at generating state-based
generalized Büchi automata (GBA): all it does is generating a
transition-based one internally, and then pushing acceptance sets onto
states. On this example, the resulting GBA produced by =-S= is larger
than the BA produced by =-B=.
As already discussed on the page about [[file:oaut.org][common output options]], various
options controls the output format of =ltl2tgba=: