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relabel: do not create automata with false labels

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* spot/twaalgos/relabel.cc: Remove false transitions if
some of the propositions are equivalent to true or false.
* NEWS: Mention the bug.
* tests/core/ltl2tgba2.test: Test it.
This commit is contained in:
Alexandre Duret-Lutz 2020-02-10 12:05:36 +01:00
parent cf2cfcd2fb
commit 9365f8de1b
3 changed files with 22 additions and 3 deletions
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7
tests/core/ltl2tgba2.test
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@ -1,6 +1,6 @@
#!/bin/sh
# -*- coding: utf-8 -*-
# Copyright (C) 2009-2019 Laboratoire de Recherche et Développement de
# Copyright (C) 2009-2020 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
@ -431,3 +431,8 @@ cat >expected <<EOF
8,(Fin(1) | Inf(0)) & (Fin(2) | Inf(1))
8,(Fin(1) | Inf(0)) & (Fin(2) | Inf(1)) & (Fin(0) | Inf(2))
EOF
# This formula used to produce translation with false label.
ltl2tgba -D -G 'F(G(a | !a) & ((b <-> c) W d))' | grep '\[f\]' && exit 1
: