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Introduce scc_filter_states().

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The main motivation is the upcoming patch that introduces
simulation_sba() and requires this function.

* src/tgbaalgos/sccfilter.hh, src/tgbaalgos/sccfilter.cc: Implement it.
* src/tgbaalgos/postproc.cc: Use it for monitors, because we do not
care about acceptance conditions.
* NEWS: Mention it.
This commit is contained in:
Alexandre Duret-Lutz 2013-05-12 17:22:00 +02:00
parent 2cab8197e5
commit 6b5b002ff9
4 changed files with 133 additions and 7 deletions
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16
src/tgbaalgos/sccfilter.hh
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@ -1,4 +1,4 @@
// Copyright (C) 2009, 2010, 2012 Laboratoire de Recherche et
// Copyright (C) 2009, 2010, 2012, 2013 Laboratoire de Recherche et
// Developpement de l'Epita (LRDE).
//
// This file is part of Spot, a model checking library.
@ -56,10 +56,24 @@ namespace spot
/// variable are also removed from transitions entering an accepting
/// SCC. ignored is a conjunction of positive variables that should
/// be removed everywhere.
///
/// \warning Calling scc_filter on a TGBA that has the SBA property
/// (i.e., transitions leaving accepting states are all marked as
/// accepting) may destroy this property. Use scc_filter_states()
/// instead.
tgba* scc_filter(const tgba* aut, bool remove_all_useless = false,
scc_map* given_sm = 0, bdd susp = bddtrue,
bool early_susp = false, bdd ignored = bddtrue);
/// \brief Prune unaccepting SCCs.
///
/// This is an abridged version of scc_filter(), that only remove
/// useless states, without touching at the acceptance conditions.
///
/// Especially, if the input TGBA has the SBA property, (i.e.,
/// transitions leaving accepting states are all marked as
/// accepting), then the output TGBA will also have that property.
tgba* scc_filter_states(const tgba* aut, scc_map* given_sm = 0);
}
#endif // SPOT_TGBAALGOS_SCC_HH