ltl2tgba_fm.hh

// Copyright (C) 2010 Laboratoire de Recherche et Développement de
// l'Epita (LRDE).
// Copyright (C) 2003, 2004, 2005, 2006 Laboratoire d'Informatique de
// Paris 6 (LIP6), département Systèmes Répartis Coopératifs (SRC),
// Université Pierre et Marie Curie.
//
// This file is part of Spot, a model checking library.
//
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// under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
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// or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
// License for more details.
//
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#ifndef SPOT_TGBAALGOS_LTL2TGBA_FM_HH
# define SPOT_TGBAALGOS_LTL2TGBA_FM_HH

#include "ltlast/formula.hh"
#include "tgba/tgbaexplicit.hh"
#include "ltlvisit/apcollect.hh"
#include "ltlvisit/reduce.hh"

namespace spot
{
  /// \brief Build a spot::tgba_explicit* from an LTL formula.
  /// \ingroup tgba_ltl
  ///
  /// This is based on the following paper.
  /// \verbatim
  /// @InProceedings{couvreur.99.fm,
  ///   author	  = {Jean-Michel Couvreur},
  ///   title     = {On-the-fly Verification of Temporal Logic},
  ///   pages     = {253--271},
  ///   editor	  = {Jeannette M. Wing and Jim Woodcock and Jim Davies},
  ///   booktitle = {Proceedings of the World Congress on Formal Methods in the
  /// 		     Development of Computing Systems (FM'99)},
  ///   publisher = {Springer-Verlag},
  ///   series	  = {Lecture Notes in Computer Science},
  ///   volume	  = {1708},
  ///   year      = {1999},
  ///   address	  = {Toulouse, France},
  ///   month	  = {September},
  ///   isbn      = {3-540-66587-0}
  /// }
  /// \endverbatim
  ///
  /// \param f The formula to translate into an automaton.
  ///
  /// \param dict The spot::bdd_dict the constructed automata should use.
  ///
  /// \param exprop When set, the algorithm will consider all properties
  /// combinations possible on each state, in an attempt to reduce
  /// the non-determinism.  The automaton will have the same size as
  /// without this option, but because the transition will be more
  /// deterministic, the product automaton will be smaller (or, at worse,
  /// equal).
  ///
  /// \param symb_merge When false, states with the same symbolic
  /// representation (these are equivalent formulae) will not be
  /// merged.
  ///
  /// \param branching_postponement When set, several transitions leaving
  /// from the same state with the same label (i.e., condition + acceptance
  /// conditions) will be merged.  This correspond to an optimization
  /// described in the following paper.
  /// \verbatim
  /// @InProceedings{	  sebastiani.03.charme,
  ///   author	  = {Roberto Sebastiani and Stefano Tonetta},
  ///   title	  = {"More Deterministic" vs. "Smaller" B{\"u}chi Automata for
  /// 		     Efficient LTL Model Checking},
  ///   booktitle = {Proceedings for the 12th Advanced Research Working
  /// 		     Conference on Correct Hardware Design and Verification
  /// 		     Methods (CHARME'03)},
  ///   pages     = {126--140},
  ///   year      = {2003},
  ///   editor	  = {G. Goos and J. Hartmanis and J. van Leeuwen},
  ///   volume	  = {2860},
  ///   series	  = {Lectures Notes in Computer Science},
  ///   month     = {October},
  ///   publisher = {Springer-Verlag}
  /// }
  /// \endverbatim
  ///
  /// \param fair_loop_approx When set, a really simple characterization of
  /// unstable state is used to suppress all acceptance conditions from
  /// incoming transitions.
  ///
  /// \param unobs When non-zero, the atomic propositions in the LTL formula
  /// are interpreted as events that exclude each other.  The events in the
  /// formula are observable events, and \c unobs can be filled with
  /// additional unobservable events.
  ///
  /// \param reduce_ltl If this parameter is set, the LTL formulae representing
  /// each state of the automaton will be simplified using spot::ltl::reduce()
  /// before computing the successor.  \a reduce_ltl should specify the type
  /// of reduction to apply as documented for spot::ltl::reduce().
  /// This idea is taken from the following paper.
  /// \verbatim
  /// @InProceedings{	  thirioux.02.fmics,
  ///   author	  = {Xavier Thirioux},
  ///   title     = {Simple and Efficient Translation from {LTL} Formulas to
  /// 		    {B\"u}chi Automata},
  ///   booktitle = {Proceedings of the 7th International ERCIM Workshop in
  /// 		     Formal Methods for Industrial Critical Systems (FMICS'02)},
  ///   series	  = {Electronic Notes in Theoretical Computer Science},
  ///   volume	  = {66(2)},
  ///   publisher = {Elsevier},
  ///   editor	  = {Rance Cleaveland and Hubert Garavel},
  ///   year      = {2002},
  ///   month     = jul,
  ///   address	  = {M{\'a}laga, Spain}
  /// }
  /// \endverbatim
  ///
  /// \return A spot::tgba_explicit that recognizes the language of \a f.
  tgba_explicit_formula*
  ltl_to_tgba_fm(const ltl::formula* f, bdd_dict* dict,
		 bool exprop = false, bool symb_merge = true,
		 bool branching_postponement = false,
		 bool fair_loop_approx = false,
		 const ltl::atomic_prop_set* unobs = 0,
		 int reduce_ltl = ltl::Reduce_None);
}

#endif // SPOT_TGBAALGOS_LTL2TGBA_FM_HH