de529df59f
Automatic mass renaming. * src/tgbaalgos/: Rename as... * src/twaalgos/: ... this. * README, configure.ac, iface/ltsmin/modelcheck.cc, src/Makefile.am, src/bin/autfilt.cc, src/bin/common_aoutput.cc, src/bin/common_aoutput.hh, src/bin/common_output.hh, src/bin/common_post.hh, src/bin/dstar2tgba.cc, src/bin/ltl2tgba.cc, src/bin/ltl2tgta.cc, src/bin/ltlcross.cc, src/bin/ltldo.cc, src/bin/ltlfilt.cc, src/bin/randaut.cc, src/dstarparse/dra2ba.cc, src/dstarparse/nra2nba.cc, src/dstarparse/nsa2tgba.cc, src/graphtest/twagraph.cc, src/kripke/kripkeprint.cc, src/ltlvisit/contain.cc, src/ltlvisit/contain.hh, src/ltlvisit/exclusive.cc, src/taalgos/emptinessta.hh, src/tgbatest/checkpsl.cc, src/tgbatest/checkta.cc, src/tgbatest/complementation.cc, src/tgbatest/emptchk.cc, src/tgbatest/ltl2tgba.cc, src/tgbatest/ltlprod.cc, src/tgbatest/randtgba.cc, src/tgbatest/taatgba.cc, src/twa/twa.cc, src/twa/twagraph.hh, src/twa/twasafracomplement.cc, wrap/python/spot_impl.i: Adjust.
104 lines
3.4 KiB
C++
104 lines
3.4 KiB
C++
// -*- coding: utf-8 -*-
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// Copyright (C) 2013, 2014 Laboratoire de Recherche et Développement de
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// l'Epita (LRDE).
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// Copyright (C) 2004, 2005 Laboratoire d'Informatique de Paris 6 (LIP6),
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// département Systèmes Répartis Coopératifs (SRC), Université Pierre
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// et Marie Curie.
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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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#pragma once
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#include "misc/optionmap.hh"
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#include "twa/fwd.hh"
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#include "emptiness.hh"
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namespace spot
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{
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/// \addtogroup emptiness_check_algorithms
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/// @{
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/// \brief Returns an emptiness checker on the spot::tgba automaton \a a.
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///
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/// \pre The automaton \a a must have at least one acceptance condition.
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///
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/// During the visit of \a a, the returned checker stores explicitely all
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/// the traversed states. The implemented algorithm is the following:
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///
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/** \verbatim
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procedure check ()
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begin
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weight = 0; // the null vector
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call dfs_blue(s0);
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end;
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procedure dfs_blue (s)
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begin
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s.color = cyan;
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s.acc = emptyset;
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s.weight = weight;
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for all t in post(s) do
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let (s, l, a, t) be the edge from s to t;
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if t.color == white then
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for all b in a do
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weight[b] = weight[b] + 1;
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end for;
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call dfs_blue(t);
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for all b in a do
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weight[b] = weight[b] - 1;
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end for;
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end if;
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Acc = s.acc U a;
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if t.color == cyan &&
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(Acc U support(weight - t.weight) U t.acc) == all_acc then
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report a cycle;
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else if Acc not included in t.acc then
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t.acc := t.acc U Acc;
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call dfs_red(t, Acc);
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end if;
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end for;
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s.color = blue;
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end;
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procedure dfs_red(s, Acc)
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begin
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for all t in post(s) do
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let (s, l, a, t) be the edge from s to t;
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if t.color == cyan &&
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(Acc U support(weight - t.weight) U t.acc) == all_acc then
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report a cycle;
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else if t.color != white and Acc not included in t.acc then
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t.acc := t.acc U Acc;
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call dfs_red(t, Acc);
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end if;
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end for;
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end;
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\endverbatim */
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///
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/// This algorithm is a generalisation to TGBA of the one implemented in
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/// spot::explicit_se05_search. It is based on the acceptance set labelling
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/// of states used in spot::explicit_tau03_search. Moreover, it introduce
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/// a slight optimisation based on vectors of integers counting for each
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/// acceptance condition how many time the condition has been visited in
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/// the path stored in the blue stack. Such a vector is associated to each
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/// state of this stack.
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///
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SPOT_API emptiness_check_ptr
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explicit_tau03_opt_search(const const_twa_ptr& a,
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option_map o = option_map());
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/// @}
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}
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