d32f19f5d0
Also have simul-max default to 4096 instead of 512, because it's really simul-trans-pruning that is very slow and need to be limited. * spot/twaalgos/postproc.cc, spot/twaalgos/postproc.hh, spot/twaalgos/simulation.cc, spot/twaalgos/simulation.hh, spot/twaalgos/determinize.cc, spot/twaalgos/determinize.hh: Implement the above options. * bin/spot-x.cc, NEWS: Document them. * tests/core/ltlsynt.test, tests/core/minusx.test, tests/core/sim3.test: Add some test cases.
92 lines
4 KiB
C++
92 lines
4 KiB
C++
// -*- coding: utf-8 -*-
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// Copyright (C) 2015-2016, 2019-2020 Laboratoire de Recherche et
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// Développement 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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#pragma once
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#include <spot/twaalgos/powerset.hh>
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#include <spot/twa/twagraph.hh>
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namespace spot
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{
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/// \ingroup twa_algorithms
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/// \brief Determinize a TGBA
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///
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/// The main algorithm works only with automata using Büchi acceptance
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/// (preferably transition-based). If generalized Büchi is input, it
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/// will be automatically degeneralized first.
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///
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/// The output will be a deterministic automaton using parity acceptance.
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///
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/// This procedure is based on an algorithm by Roman Redziejowski
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/// \cite redziejowski.12.fi . Redziejowski's algorithm is similar
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/// to Piterman's improvement of Safra's algorithm, except it is
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/// presented on transition-based acceptance and use simpler
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/// notations. We implement three additional optimizations (they
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/// can be individually disabled) based on
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///
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/// - knowledge about SCCs of the input automaton
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/// - knowledge about simulation relations in the input automaton
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/// - knowledge about stutter-invariance of the input automaton
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///
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/// The last optimization is an idea implemented in
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/// [`ltl2dstar`](https://www.ltl2dstar.fr) \cite klein.07.ciaa . In
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/// fact, `ltl2dstar` even has a finer version (letter-based
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/// stuttering) that is not implemented here.
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///
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/// \param aut the automaton to determinize
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///
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/// \param pretty_print whether to decorate states with names
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/// showing the paths they track (this only
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/// makes sense if the input has Büchi
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/// acceptance already, otherwise the input
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/// automaton will be degeneralized and the
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/// names will refer to the states in the
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/// degeneralized automaton).
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///
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/// \param use_scc whether to simplify the construction based on
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/// the SCCs in the input automaton.
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///
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/// \param use_simulation whether to simplify the construction based
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/// on simulation relations between states in
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/// the original automaton.
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///
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/// \param use_stutter whether to simplify the construction when the
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/// input automaton is known to be
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/// stutter-invariant. (The stutter-invariant
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/// flag of the input automaton is used, so it
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/// might be worth to call
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/// spot::check_stutter_invariance() first if
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/// possible.)
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///
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/// \param aborter abort the construction if the constructed
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/// automaton would be too large. Return nullptr
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/// in this case.
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///
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/// \param trans_pruning when \a use_simulation is true, \a trans_pruning
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/// is passed to the simulation-based reduction to limit
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/// the effect of transition pruning.
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SPOT_API twa_graph_ptr
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tgba_determinize(const const_twa_graph_ptr& aut,
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bool pretty_print = false,
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bool use_scc = true,
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bool use_simulation = true,
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bool use_stutter = true,
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const output_aborter* aborter = nullptr,
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int trans_pruning = -1);
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}
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