0c4b701630
This fixes issue #418. * spot/twa/acc.cc, spot/twa/acc.hh (acc_cond::acc_code::useless_colors_patterns): New method to detect patterns of colors allowing other colors to be added or removed at will. * spot/twaalgos/cleanacc.cc (simplify_acceptance_here): Use the above patterns to remove some useless colors from transitions and hope that this can help simplify the acceptance condition. * spot/twaalgos/degen.cc (propagate_marks_vector): Use the pattern to add more colors. * tests/core/ltl2tgba2.test: Add the test case from issue #418. * tests/core/ltl2dstar4.test, tests/core/satmin3.test, tests/core/sccdot.test, tests/core/sim3.test, tests/python/automata.ipynb, tests/python/decompose.ipynb, tests/python/merge.py, tests/python/pdegen.py, tests/python/remfin.py, tests/python/toparity.py, tests/python/tra2tba.py: Adjust all test cases. * NEWS: Mention this new feature.
95 lines
2.1 KiB
Python
95 lines
2.1 KiB
Python
# -*- mode: python; coding: utf-8 -*-
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# Copyright (C) 2015-2018, 2020 Laboratoire de Recherche et Développement de
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# l'Epita
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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 test used to trigger an assertion (or a segfault)
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# in scc_filter_states().
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aut = spot.automaton("""
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HOA: v1
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States: 3
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Start: 1
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AP: 1 "a"
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Acceptance: 1 Inf(0)
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--BODY--
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State: 0 {0}
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[t] 0
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State: 1
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[!0] 0
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[0] 2
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State: 2
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[t] 2
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--END--
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""")
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aut.prop_inherently_weak(True)
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aut = spot.dualize(aut)
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aut1 = spot.scc_filter_states(aut)
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assert(aut1.to_str('hoa') == """HOA: v1
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States: 2
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Start: 0
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AP: 1 "a"
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acc-name: co-Buchi
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Acceptance: 1 Fin(0)
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properties: trans-labels explicit-labels state-acc deterministic
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properties: very-weak
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--BODY--
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State: 0 {0}
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[0] 1
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State: 1
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[t] 1
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--END--""")
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assert(aut.scc_filter_states().to_str() == aut1.to_str())
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assert(aut1.get_name() == None)
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aut1.set_name("test me")
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assert(aut1.get_name() == "test me")
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# The method is the same as the function
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a = spot.translate('true', 'low', 'any')
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assert(a.prop_universal().is_maybe())
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assert(a.prop_unambiguous().is_maybe())
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assert(a.is_deterministic() == True)
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assert(a.is_unambiguous() == True)
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a = spot.automaton("""
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HOA: v1
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States: 3
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Start: 0
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AP: 2 "a" "b"
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acc-name: Buchi
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Acceptance: 5 Inf(0)&Fin(4) | Inf(2)&Inf(3) | Inf(1)
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--BODY--
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State: 0 {3}
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[t] 0
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[0] 1 {1}
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[!0] 2 {0 4}
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State: 1 {3}
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[1] 0
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[0&1] 1 {0}
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[!0&1] 2 {2 4}
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State: 2
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[!1] 0
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[0&!1] 1 {0}
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[!0&!1] 2 {0 4}
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--END--
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""")
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b = spot.remove_fin(a)
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size = (b.num_states(), b.num_edges())
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assert size == (5, 13);
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