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product: fix handling of operand with false acceptance

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* NEWS: Mention the issue.
* spot/twaalgos/product.cc: Fix it.
* tests/python/prodexpt.py: Test it.
This commit is contained in:
Alexandre Duret-Lutz 2020-03-06 23:23:13 +01:00
parent 7f0ef7ad59
commit d8a0f307eb
3 changed files with 73 additions and 18 deletions
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35
tests/python/prodexpt.py
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@ -1,6 +1,6 @@
# -*- mode: python; coding: utf-8 -*-
# Copyright (C) 2016-2017, 2019 Laboratoire de Recherche et Développement de
# l'Epita (LRDE).
# Copyright (C) 2016-2017, 2019-2020 Laboratoire de Recherche et Développement
# de l'Epita (LRDE).
#
# This file is part of Spot, a model checking library.
#
@ -102,3 +102,34 @@ res = spot.product(left, right, spot.output_aborter(900, 9000))
assert res is None
res = spot.product(left, right, spot.output_aborter(1000, 9000))
assert res is not None
a, b = spot.automata("""HOA: v1 States: 1 Start: 0 AP: 0 acc-name: all
Acceptance: 0 t properties: trans-labels explicit-labels state-acc complete
properties: deterministic stutter-invariant weak --BODY-- State: 0 [t] 0
--END-- HOA: v1 States: 1 Start: 0 AP: 0 acc-name: none Acceptance: 0 f
properties: trans-labels explicit-labels state-acc complete properties:
deterministic stutter-invariant weak --BODY-- State: 0 [t] 0 --END--""")
out = spot.product(a, b).to_str()
assert out == """HOA: v1
States: 1
Start: 0
AP: 0
acc-name: none
Acceptance: 0 f
properties: trans-labels explicit-labels state-acc deterministic
properties: stutter-invariant terminal
--BODY--
State: 0
--END--"""
out = spot.product_susp(a, b).to_str()
assert out == """HOA: v1
States: 1
Start: 0
AP: 0
acc-name: all
Acceptance: 0 t
properties: trans-labels explicit-labels state-acc deterministic
properties: stutter-invariant terminal
--BODY--
State: 0
--END--"""