a7db0b5435
* src/twaalgos/strength.cc, src/twaalgos/strength.hh (decompose_stregth): New function. * src/bin/autfilt.cc: Add a --decompose-strength option. * src/bin/man/autfilt.x: Add bibliography. * src/tests/strength.test: Test it. * NEWS: Mention it.
110 lines
3.8 KiB
C++
110 lines
3.8 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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#pragma once
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#include "sccinfo.hh"
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namespace spot
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{
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/// \brief Whether an automaton is terminal.
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///
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/// An automaton is terminal if it is weak, and all accepting SCCs
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/// are complete.
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///
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/// \param aut the automaton to check
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///
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/// \param sm an scc_info object for the automaton if available (it
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/// will be built otherwise).
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SPOT_API bool
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is_terminal_automaton(const const_twa_graph_ptr& aut, scc_info* sm = nullptr);
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/// \brief Whether an automaton is weak.
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///
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/// An automaton is weak if if any given SCC, all transitions belong
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/// to the same acceptance sets.
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///
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/// \param aut the automaton to check
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///
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/// \param sm an scc_info object for the automaton if available (it
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/// will be built otherwise).
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SPOT_API bool
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is_weak_automaton(const const_twa_graph_ptr& aut, scc_info* sm = nullptr);
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/// \brief Whether a minimized WDBA represents a safety property.
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///
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/// A minimized WDBA (as returned by a successful run of
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/// minimize_obligation()) represent safety property if it contains
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/// only accepting transitions.
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///
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/// \param aut the automaton to check
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SPOT_API bool
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is_safety_mwdba(const const_twa_graph_ptr& aut);
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/// \brief Whether an automaton is weak or terminal.
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///
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/// This sets the "weak" and "terminal" property as appropriate.
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///
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/// \param aut the automaton to check
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///
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/// \param sm an scc_info object for the automaton if available (it
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/// will be built otherwise).
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SPOT_API void
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check_strength(const twa_graph_ptr& aut, scc_info* sm = nullptr);
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/// \brief Extract a sub-automaton of a given strength
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///
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/// The string \a keep should be a non-empty combination of
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/// the following letters:
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/// - 'w': keep only weak SCCs (i.e., SCCs in which all transitions belong
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/// to the same acceptance sets) that are not terminal.
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/// - 't': keep terminal SCCs (i.e., weak SCCs that are complete)
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/// - 's': keep strong SCCs (i.e., SCCs that are not weak).
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///
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/// This algorithm returns a subautomaton that contains all SCCs of the
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/// requested strength, plus any upstream SCC (but adjusted not to be
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/// accepting).
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///
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/** \verbatim
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@inproceedings{renault.13.tacas,
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author = {Etienne Renault and Alexandre Duret-Lutz and Fabrice
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Kordon and Denis Poitrenaud},
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title = {Strength-Based Decomposition of the Property {B\"u}chi
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Automaton for Faster Model Checking},
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booktitle = {Proceedings of the 19th International Conference on Tools
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and Algorithms for the Construction and Analysis of Systems
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(TACAS'13)},
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editor = {Nir Piterman and Scott A. Smolka},
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year = {2013},
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month = mar,
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pages = {580--593},
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publisher = {Springer},
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series = {Lecture Notes in Computer Science},
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volume = {7795},
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doi = {10.1007/978-3-642-36742-7_42}
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}
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\endverbatim */
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///
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/// \param aut the automaton to decompose
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/// \param keep a string specifying the strengths to keep: it should
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SPOT_API twa_graph_ptr
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decompose_strength(const const_twa_graph_ptr& aut, const char* keep);
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}
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