product_susp: fix product of state-based automata
Reported by Simon Jantsch. * spot/twaalgos/product.cc: Here. * tests/core/unambig2.test: New file, testing this plus the previous patch. * tests/Makefile.am: Add unambig2.test. * NEWS: Mention the bug.
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Alexandre Duret-Lutz
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commit
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4 changed files with 149 additions and 17 deletions
6
NEWS
6
NEWS
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@ -28,6 +28,12 @@ New in spot 2.7.0.dev (not yet release)
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- The core translation for unambiguous automata was incorrectly
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tagging some non-weak automata as weak.
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- The product_susp() function used to multiply an automaton with a
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suspendable automaton could incorrectly build transition-based
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automata when multipliying two state-based automata. This caused
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ltl2tgba to emit error messages such as: "automaton has
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transition-based acceptance despite prop_state_acc()==true"
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New in spot 2.7 (2018-12-11)
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Command-line tools:
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@ -1,5 +1,5 @@
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// -*- coding: utf-8 -*-
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// Copyright (C) 2014-2018 Laboratoire de Recherche et Développement
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// Copyright (C) 2014-2019 Laboratoire de Recherche et Développement
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// de l'Epita (LRDE).
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//
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// This file is part of Spot, a model checking library.
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@ -367,7 +367,7 @@ namespace spot
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auto target_scc = [&](unsigned scc) -> bool
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{
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return (!si.is_trivial(scc)
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&& (sync_all ||si.is_accepting_scc(scc) == and_acc));
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&& (sync_all || si.is_accepting_scc(scc) == and_acc));
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};
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if (target_scc(si.scc_of(left_init)))
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@ -385,20 +385,15 @@ namespace spot
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for (auto& l: left->out(top.first.first))
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if (!target_scc(si.scc_of(l.dst)))
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{
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if (!sbacc || top.first.second == -1U)
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{
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res->new_edge(top.second, new_state(l.dst, -1U), l.cond,
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merge_acc(l.acc, rejmark));
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}
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else
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{
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// This edge leaves a target SCC, but we build a
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// state-based automaton, so make sure we still
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// use the same acceptance marks as in the SCC.
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auto rm = right->state_acc_sets(top.first.second);
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res->new_edge(top.second, new_state(l.dst, -1U), l.cond,
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merge_acc(l.acc, rm));
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}
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acc_cond::mark_t right_acc =
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(sbacc && top.first.second != -1U)
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// This edge leaves a target SCC, but we build a
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// state-based automaton, so make sure we still use
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// the same acceptance marks as in the SCC we leave.
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? right->state_acc_sets(top.first.second)
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: rejmark;
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res->new_edge(top.second, new_state(l.dst, -1U), l.cond,
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merge_acc(l.acc, right_acc));
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}
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else
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{
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@ -411,8 +406,15 @@ namespace spot
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if (cond == bddfalse)
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continue;
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auto dst = new_state(l.dst, r.dst);
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// For state-based automata, we cannot use the
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// right-mark when entering a target SCC, because
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// another sibling transition might be going to a
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// non-target SCC without this mark.
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acc_cond::mark_t right_acc =
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(sbacc && top.first.second == -1U) ? rejmark : r.acc;
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res->new_edge(top.second, dst, cond,
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merge_acc(l.acc, r.acc));
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merge_acc(l.acc, right_acc));
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}
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}
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}
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@ -273,6 +273,7 @@ TESTS_twa = \
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core/monitor.test \
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core/dra2dba.test \
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core/unambig.test \
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core/unambig2.test \
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core/ltlcross4.test \
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core/ltl3ba.test \
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core/streett.test \
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123
tests/core/unambig2.test
Executable file
123
tests/core/unambig2.test
Executable file
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@ -0,0 +1,123 @@
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#!/bin/sh
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# -*- coding: utf-8 -*-
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# Copyright (C) 2019 Laboratoire de Recherche et
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# Developpement de 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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. ./defs
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set -e
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# The following list of formulas was reported by Simon Jantsch.
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cat >errors <<EOF
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| G ! "2" F & X "1" F "2"
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| V X "2" "2" F W "2" f
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| & "2" G "1" F G "2"
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i U t "2" U F "2" "1"
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& G F "1" i "1" F "2"
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& G F "2" ^ "2" X G "2"
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| F G "1" & "1" X "1"
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i W "2" G "1" G "1"
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! | | "2" G "1" F G "2"
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i | G "1" W "2" "1" F G "2"
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i ^ "2" G X "2" F G "1"
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& & "2" G F "1" U t "1"
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| F G "1" i F "1" "2"
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| U "1" X ! "1" F G ! "1"
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! & ! F G "1" i G "1" "2"
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i ! F G "2" i U t "2" "1"
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| ! G F "2" & "2" G "1"
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| & "1" ! U t "2" F ! F "2"
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& G ! G "1" | "1" X "1"
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& G ! G "2" | "1" F "2"
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i G F "2" & "2" X "2"
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& ! G "1" W "2" G "1"
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& | "2" F "1" G F "2"
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| F G "1" & "1" W "2" f
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& F "2" W "1" ! F "2"
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| G | X "1" G "2" F ! F "1"
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| F W "2" f i F "2" "1"
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& W F "2" f i G "1" "2"
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| ! F "2" U F "2" "1"
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& G F "2" ! & "2" G "1"
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| | "1" ! F "2" F G "1"
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& & "2" U t "1" G U t "2"
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i G U t "2" & "1" ! F "2"
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& G ! G "1" W X "1" "1"
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| & "2" X "1" F G "1"
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i G F "2" & "2" G "1"
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! & & "2" F "1" G F "1"
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& & "1" F "2" ! F G "2"
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| & "2" X "2" F W "2" f
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i X W "1" G "2" G "2"
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i X G "2" ! W "1" G "2"
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! i i "2" X "2" F G "2"
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& G U t "2" i G "1" "2"
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i G F "1" & F "2" X "1"
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| F G "2" & "1" X "2"
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i G F "2" & ! "2" G "1"
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| G ! "2" U U t "2" "1"
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i W F "2" f ! V "2" X "1"
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| F V f "2" & "2" X "2"
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& | "2" F "1" G F "1"
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& F "2" ! U F "2" "1"
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& G ! G "1" | "2" X "2"
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G ^ ! G "2" F ^ "1" G ! G "2"
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i ! F G "2" i "1" ! F "2"
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& G F "2" i W "2" f "1"
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& F "2" ! U F "2" ! "1"
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& G F "1" i G "1" "2"
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i G F "2" & "1" X "1"
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! i W ! G "2" f V X "2" "2"
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| G i "1" X "2" i G F "2" G "1"
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& F "2" W "1" W ! "2" f
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| F G ! "2" & "2" X "2"
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! & i "2" F "1" ! U t G "2"
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| F G "2" & "1" ! F "2"
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! & U t "1" ! U F "1" "2"
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! | | "2" ! G ! G "2" G "1"
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| i F "2" "1" F G "1"
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| F G "1" & ! "1" G "2"
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& | "1" X "1" G F "1"
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& i "2" F "1" G F "1"
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& & "1" F "2" G F "1"
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! & F "1" ! X U F "1" "2"
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i ! F G "2" V F "2" "1"
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i ! U ! G "1" "2" G "1"
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i i "1" F "2" F ! F "2"
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i F "1" | "2" F G "2"
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& U t "2" W "1" ! F "2"
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i G | G "2" W "1" "2" G "2"
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! & ! F G "2" | F "2" ! F "2"
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| F W "1" f & "2" ! F "1"
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| F G "1" U ! "1" X "1"
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& i X "2" "2" ! F G "2"
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& | "1" X "1" ! F W "1" f
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& ! G "2" ! U ! G "2" "1"
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| F G "2" & "1" W "2" f
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& i ! U t "1" "2" G ! G "1"
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& V "2" X "1" G F "1"
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| F G "2" & ! "2" W "1" f
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! i W "2" F "1" F G "2"
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& & "2" G F "2" ! G "1"
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| ! F "1" F & F "1" X "2"
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| F G "2" & ! "2" X "2"
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| F G "2" i F "2" & "1" "2"
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i i X "2" "2" F G "2"
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EOF
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ltlcross --lbt-input -F errors 'ltl2tgba -U -B --low' 'ltl2tgba'
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