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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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9
spot/tl/simplify.hh
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@ -1,6 +1,6 @@
// -*- coding: utf-8 -*-
// Copyright (C) 2011, 2012, 2013, 2014, 2015, 2016 Laboratoire de
// Recherche et Developpement de l'Epita (LRDE).
// Copyright (C) 2011-2017 Laboratoire de Recherche et Developpement
// de l'Epita (LRDE).
//
// This file is part of Spot, a model checking library.
//
@ -176,6 +176,11 @@ namespace spot
/// This also clears the language containment cache.
void clear_as_bdd_cache();
/// \brief Clear all caches.
///
/// This empties all the cache used by the simplifier.
void clear_caches();
/// Return the bdd_dict used.
bdd_dict_ptr get_dict() const;