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ltl2tgba: clear simplification cache between translations

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The cache used in formula simplification will keep atomic propositions
defined between several translations, and may impact variable order.
Reported by Maximilien Colange.

* spot/tl/simplify.hh, spot/tl/simplify.cc,
spot/twaalgos/translate.cc, spot/twaalgos/translate.hh (clear_cache):
New method.
* bin/ltl2tgba.cc, bin/ltl2tgta.cc: Call it.
* spot/twaalgos/stats.cc: Do not keep a point to the formula after
printing statistics.
* tests/core/ltl2tgba.test: Add a test case.
* tests/core/readsave.test: Adjust one formula.
* NEWS: Mention the issue.
This commit is contained in:
Alexandre Duret-Lutz 2017-05-10 15:59:58 +02:00
parent d3d2364ad0
commit aa40482352
10 changed files with 60 additions and 14 deletions
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18
tests/core/ltl2tgba.test
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@ -1,10 +1,10 @@
#!/bin/sh
# -*- coding: utf-8 -*-
# Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016
# Laboratoire de Recherche et Développement de l'Epita (LRDE).
# Copyright (C) 2003, 2004 Laboratoire d'Informatique de Paris 6 (LIP6),
# département Systèmes Répartis Coopératifs (SRC), Université Pierre
# et Marie Curie.
# Copyright (C) 2009-2017 Laboratoire de Recherche et Développement de
# l'Epita (LRDE).
# Copyright (C) 2003-2004 Laboratoire d'Informatique de Paris 6
# (LIP6), département Systèmes Répartis Coopératifs (SRC), Université
# Pierre et Marie Curie.
#
# This file is part of Spot, a model checking library.
#
@ -230,3 +230,11 @@ ltl2tgba -f a -s | autfilt -q --ap=1 --lbtt | autfilt -q --ap=1
# of the test-suite where this resize is triggered, so do not remove
# it unless you can find another place that triggers that.
genltl --go-theta=18 | ltl2tgba --low --any -q
# Calling ltl2tgba once for two formulas should give the same result
# as calling twice on each formula. We had a problem where the order
# of atomic propositions would be sensible to the formulas seen
# before.
(ltl2tgba Fb ; ltl2tgba 'GFa & GFb') >out1
ltl2tgba Fb 'GFa & GFb' >out2
diff out1 out2