d019ea61fe
Fixes #468. * python/spot/__init__.py: Add wrapper around twa::acc() and twa::get_acceptance() to store the automaton into the acceptance proxy, therefore ensuring that the automaton survives that proxy. * tests/python/setacc.py: Test it.
108 lines
3.5 KiB
Python
108 lines
3.5 KiB
Python
#!/usr/bin/python3
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# -*- mode: python; coding: utf-8 -*-
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# Copyright (C) 2016, 2018, 2021 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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# Test case reduced from a report from Juraj Major <major@fi.muni.cz>.
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a = spot.make_twa_graph(spot._bdd_dict)
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a.set_acceptance(0, spot.acc_code("t"))
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assert(a.prop_state_acc() == True)
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a.set_acceptance(1, spot.acc_code("Fin(0)"))
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assert(a.prop_state_acc() == spot.trival.maybe())
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# Some tests for used_inf_fin_sets(), which return a pair of mark_t.
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(inf, fin) = a.get_acceptance().used_inf_fin_sets()
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assert inf == []
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assert fin == [0]
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(inf, fin) = spot.acc_code("(Fin(0)|Inf(1))&Fin(2)&Inf(0)").used_inf_fin_sets()
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assert inf == [0, 1]
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assert fin == [0, 2]
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# is_rabin_like() returns (bool, [(inf, fin), ...])
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(b, v) = spot.acc_cond("(Fin(0)&Inf(1))|(Fin(2)&Inf(0))").is_rabin_like()
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assert b == True
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assert len(v) == 2
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assert v[0].fin == [0]
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assert v[0].inf == [1]
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assert v[1].fin == [2]
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assert v[1].inf == [0]
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(b, v) = spot.acc_cond("(Fin(0)|Inf(1))&(Fin(2)|Inf(0))").is_rabin_like()
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assert b == False
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assert len(v) == 0
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(b, v) = spot.acc_cond("(Fin(0)|Inf(1))&(Fin(2)|Inf(0))").is_streett_like()
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assert b == True
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assert repr(v) == \
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'(spot.rs_pair(fin=[0], inf=[1]), spot.rs_pair(fin=[2], inf=[0]))'
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v2 = (spot.rs_pair(fin=[0], inf=[1]), spot.rs_pair(fin=[2], inf=[0]))
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assert v == v2
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acc = spot.acc_cond("generalized-Rabin 1 2")
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(b, v) = acc.is_generalized_rabin()
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assert b == True
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assert v == (2,)
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(b, v) = acc.is_generalized_streett()
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assert b == False
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assert v == ()
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(b, v) = acc.is_streett_like()
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assert b == True
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ve = (spot.rs_pair([0], []), spot.rs_pair([], [1]), spot.rs_pair([], [2]))
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assert v == ve
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assert acc.name() == "generalized-Rabin 1 2"
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# At the time of writting, acc_cond does not yet recognize
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# "generalized-Streett", as there is no definition for that in the HOA format,
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# and defining it as follows (dual for gen.Rabin) would prevent Streett from
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# being a generalized-Streett. See issue #249.
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acc = spot.acc_cond("Inf(0)|Fin(1)|Fin(2)")
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(b, v) = acc.is_generalized_streett()
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assert b == True
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assert v == (2,)
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(b, v) = acc.is_generalized_rabin()
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assert b == False
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assert v == ()
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# FIXME: We should have a way to disable the following output, as it is not
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# part of HOA v1.
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assert acc.name() == "generalized-Streett 1 2"
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# issue #469. This test is meaningful only if Spot is compiled with
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# --enable-max-accsets=64 or more.
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try:
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m = spot.mark_t([33])
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assert m.lowest() == m
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n = spot.mark_t([33,34])
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assert n.lowest() == m
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except RuntimeError as e:
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if "Too many acceptance sets used." in str(e):
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pass
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else:
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raise e
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# issue #468
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from gc import collect
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acc = spot.translate('a').acc()
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collect()
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assert acc == spot.acc_cond('Inf(0)')
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acc = spot.translate('b').get_acceptance()
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collect()
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assert acc == spot.acc_code('Inf(0)')
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