918548a03d
Reported by Florian Renkin. * spot/twaalgos/emptiness.cc (reduce): If the automaton uses Fin acceptance, check the reduced cycle and revert to the original cycle if necessary. * tests/python/intrun.py: New file. * tests/Makefile.am: Add it. * spot/twaalgos/emptiness.hh: Improve documentation.
38 lines
1.8 KiB
Python
38 lines
1.8 KiB
Python
# -*- mode: python; coding: utf-8 -*-
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# Copyright (C) 2020 Laboratoire de Recherche et Développement de l'Epita
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# (LRDE).
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#
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# This file is part of Spot, a model checking library.
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#
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# Spot is free software; you can redistribute it and/or modify it
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# under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# Spot is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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# License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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import spot
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# This issue was reported by Florian Renkin. The reduce() call used in
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# intersecting_run() was bogus, and could incorrectly reduce a word
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# intersecting the product into a word not intersecting the product if the
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# acceptance condition uses some Fin.
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a, b = spot.automata("""HOA: v1 States: 5 Start: 0 AP: 2 "p0" "p1" acc-name:
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Rabin 2 Acceptance: 4 (Fin(0) & Inf(1)) | (Fin(2) & Inf(3)) properties:
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trans-labels explicit-labels trans-acc complete properties: deterministic
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--BODY-- State: 0 [t] 3 State: 1 [t] 4 {1} State: 2 [0] 2 {1} [!0] 1 {0} State:
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3 [t] 1 {1} State: 4 [!0&1] 4 {3} [!0&!1] 3 [0] 2 {0} --END-- HOA: v1 States: 5
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Start: 0 AP: 2 "p0" "p1" Acceptance: 3 Inf(2) | (Fin(0) & Inf(1)) properties:
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trans-labels explicit-labels trans-acc complete properties: deterministic
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--BODY-- State: 0 [t] 3 State: 1 [t] 4 {1 2} State: 2 [0] 2 {1 2} [!0] 1 {0 2}
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State: 3 [t] 1 {1 2} State: 4 [!0&1] 4 {2} [!0&!1] 3 {2} [0] 2 {0 2} --END--""")
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r = b.intersecting_run(spot.complement(a));
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c = spot.twa_word(r).as_automaton()
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assert c.intersects(b)
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assert not c.intersects(a)
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