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twagraph: remove bddfalse edges in purge_dead_states

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* spot/twa/twagraph.cc (purge_dead_states): Be bddfalse-aware!
* spot/twa/twagraph.hh, NEWS: Document this.
* tests/python/alternating.py, tests/python/twagraph.py: Add some
test cases.
This commit is contained in:
Alexandre Duret-Lutz 2021-11-19 22:13:20 +01:00
parent 59690dd041
commit 5f49209caf
5 changed files with 33 additions and 6 deletions
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9
tests/python/alternating.py
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@ -1,6 +1,6 @@
#!/usr/bin/python3
# -*- mode: python; coding: utf-8 -*-
# Copyright (C) 2016, 2017 Laboratoire de Recherche et Développement de
# Copyright (C) 2016, 2017, 2021 Laboratoire de Recherche et Développement de
# l'EPITA.
#
# This file is part of Spot, a model checking library.
@ -207,3 +207,10 @@ State: 2
desalt = spot.remove_univ_otf(aut)
assert(desalt.to_str('hoa') == out)
assert aut.num_states() == 3
assert aut.num_edges() == 3
aut.edge_storage(3).cond = buddy.bddfalse
aut.purge_dead_states()
assert aut.num_states() == 1
assert aut.num_edges() == 0