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postproc: fix monitor code

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Fixes #240.

* spot/twaalgos/postproc.cc: Do not call do_simul on the output of
minimize_monitor(), and do not skip complete() when PREF_==Any.
* tests/core/monitor.test: Add a test case.
* NEWS: Mention the bug.
* doc/org/ltl2tgba.org: Document complete monitors.
This commit is contained in:
Alexandre Duret-Lutz 2017-03-03 14:29:10 +01:00
parent cf5d2c2b32
commit 2b9accdf58
4 changed files with 61 additions and 44 deletions
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49
doc/org/ltl2tgba.org
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@ -921,32 +921,6 @@ $txt
ltl2tgba -MD '(Xa & Fb) | Gc' -d
#+END_SRC
#+RESULTS: monitor2
#+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 -> 3
0 [label=<0>]
0 -> 0 [label=<1>]
1 [label=<1>]
1 -> 0 [label=<a>]
2 [label=<2>]
2 -> 2 [label=<c>]
3 [label=<3>]
3 -> 1 [label=<!c>]
3 -> 4 [label=<c>]
4 [label=<4>]
4 -> 0 [label=<a>]
4 -> 2 [label=<!a &amp; c>]
}
#+end_example
#+BEGIN_SRC dot :file monitor2.png :cmdline -Tpng :var txt=monitor2 :exports results
$txt
#+END_SRC
@ -959,6 +933,29 @@ match the formula, monitor cannot be used to check for eventualities
such as =F(a)=: indeed, any finite execution can be extended to match
=F(a)=.
Because Monitors accept every recognized run (in other words, they
only reject words that are not recognized), it makes little sense to
use option =-C= to request /complete/ monitors. If uou combine =-C=
with =-M=, the result will output as a Büchi automaton if (and only
if) a sink state had to be added. For instance, here is the
"complete" version of the previous monitor.
#+NAME: monitor3
#+BEGIN_SRC sh :results verbatim :exports code
ltl2tgba -C -M -D '(Xa & Fb) | Gc' -d
#+END_SRC
#+BEGIN_SRC dot :file monitor3.png :cmdline -Tpng :var txt=monitor3 :exports results
$txt
#+END_SRC
#+RESULTS:
[[file:monitor3.png]]
# LocalWords: ltl tgba num toc PSL Büchi automata SRC GFb invis Acc
# LocalWords: ltlfilt filenames GraphViz vectorial pdf Tpdf dotex
# LocalWords: sed png cmdline Tpng txt iff GFa ba utf UTF lbtt Fb