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twaalgos: implement restrict_dead_end_edges_here()

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Discussed in issue #587.

* spot/twaalgos/deadends.cc, spot/twaalgos/deadends.hh: New files.
* spot/twaalgos/Makefile.am, python/spot/impl.i: Add them.
* tests/core/deadends.test, tests/python/deadends.py: New files.
* tests/Makefile.am: Add them.
* spot/twa/acc.cc, spot/twa/acc.hh (keep_one_inf_per_branch): New
method.
* bin/autfilt.cc: Learn option --restrict-dead-end-edges.
* NEWS: Mention it.
This commit is contained in:
Alexandre Duret-Lutz 2024-07-15 15:27:57 +02:00
parent f03e32619a
commit 31511e042a
11 changed files with 588 additions and 1 deletions
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70
tests/core/deadends.test Executable file
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#!/bin/sh
# -*- coding: utf-8 -*-
# Copyright (C) by the Spot authors, see the AUTHORS file for details.
#
# This file is part of Spot, a model checking library.
#
# Spot is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# Spot is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
# License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
. ./defs
set -e
# The following formula was incorrectly reduced during
# the development of --restrict-dead-edges.
out=`ltl2tgba 'X((GF!p2 R p3) & G(p3 U p2))' |
autfilt --restrict-dead --stats='%T %t'`
test "$out" = '11 11' # should be twice the same value
# The following formulas are all reduced
cat >input.ltl <<EOF
F((Gp2 & XGp3) | (F!p2 & XF!p3))
F((XGp2 & G!p1) | G(Fp1 & F!p2))
F((p3 W Gp1) W XG!p0)
X(p1 & ((p2 & Gp1) | (!p2 & F!p1))) M Gp2
FG(p0 M Xp1)
G!p2 U G(p0 & Xp1)
FG(p1 M (p0 R (((p0 & p3) | (!p0 & !p3)) M p3)))
F(G(!p1 & ((!p1 & !p3) | (p1 & p3))) | G(Fp1 & F((!p1 & p3) | (p1 & !p3))))
G!p3 & FG((p0 | p1 | X!p1) & (!p0 | Xp1) & (!p1 | Xp1))
FG(p0 & (Xp2 | (!p2 M FG!p3)) & ((p2 W GFp3) | X!p2))
FG(((p0 M Xp2) | (p1 R Fp3)) & ((!p0 W X!p2) | (!p1 U G!p3)))
F!p2 & X((Gp1 | XGp0) U XGp2)
G(Fp0 & FGp1 & F!p2)
F(G((p0 | p1) & Xp1) & FGp0)
(p0 | X(p0 M Gp3)) U X((Fp3 & Gp0) | (F!p0 & G!p3))
XF((Fp2 & XFp3) | (G!p2 & XG!p3))
FG((Gp3 | X!p0) & (Xp0 | F!p3))
(p1 & p2) M FG((p2 | XGp3) & (!p2 | XF!p3))
Fp2 W G(XGp3 M (G!p1 M Xp0))
FG(p2 M Xp1)
F(GFp1 & (Xp3 W Gp3))
F(G(p1 & !p2) | G(Fp2 & F!p1))
F(G((!p3 M p0) & Fp1) | G(F(p3 W !p0) & FG!p1))
G!p3 U XG!p0
XXF(XF!p3 | G((p1 & X(p1 | p3)) | (!p1 & X(!p1 & !p3))))
FG((Gp2 | Xp3) & (F!p2 | X!p3))
((p0 & FG!p0) | (!p0 & GFp0)) M G(!p3 & F!p2)
GFp0 & FGp1 & FGp2 & GFp3
EOF
ltl2tgba -F input.ltl | tee output.aut |
autfilt --restrict-dead --stats="%T %t %M" |
while read in out f; do
: $in : $out : "$f"
test $in -le $out && exit 1
:
done
autcross -F output.aut --language-preserved 'autfilt --restrict-dead'