e01ab2b236
* src/tgbaalgos/sccinfo.cc, src/tgbaalgos/sccinfo.hh: add scc_info::begin() and scc_info::end() methods to iterate over the node_ vector. Tidy the scc_node structure that that its member are accessed via methods. * src/tgbaalgos/safety.cc, src/bin/ltlcross.cc: Simplify using this interface.
75 lines
1.9 KiB
C++
75 lines
1.9 KiB
C++
// -*- coding: utf-8 -*-
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// Copyright (C) 2010, 2011, 2013, 2014, 2015 Laboratoire de Recherche
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// et Développement 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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//
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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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#include "safety.hh"
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#include "misc/hash.hh"
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#include <deque>
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namespace spot
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{
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bool
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is_guarantee_automaton(const const_tgba_digraph_ptr& aut,
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const scc_info* si)
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{
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// Create an scc_info if the user did not give one to us.
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bool need_si = !si;
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if (need_si)
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si = new scc_info(aut);
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bool result = true;
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for (auto& scc: *si)
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{
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if (!scc.is_accepting())
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continue;
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// Accepting SCCs should have only one state.
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auto& st = scc.states();
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if (st.size() != 1)
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{
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result = false;
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break;
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}
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// The state should have only one transition that is a
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// self-loop labelled by true.
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auto src = st.front();
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auto out = aut->out(src);
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auto it = out.begin();
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assert(it != out.end());
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result =
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(it->cond == bddtrue) && (it->dst == src) && (++it == out.end());
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if (!result)
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break;
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}
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if (need_si)
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delete si;
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return result;
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}
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bool is_safety_mwdba(const const_tgba_digraph_ptr& aut)
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{
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for (auto& t: aut->transitions())
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if (!aut->acc().accepting(t.acc))
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return false;
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return true;
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}
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}
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