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improve support for LTLf semantics

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* spot/twaalgos/remprop.cc, spot/twaalgos/remprop.hh (to_finite): New
function.
* bin/autfilt.cc (--to-finite): Add it.
* doc/org/tut12.org: Update to use it.
* spot/twa/twagraph.cc (purge_dead_states): Also remove false edges.
* spot/parseaut/parseaut.yy: Do not ignore false self-loops, and
add false self-loop on accepting states without successors.
* NEWS: List the above changes.
* tests/core/ltlf.test: New file.
* tests/Makefile.am: Add it.
* tests/core/complete.test: Adjust expected output.
This commit is contained in:
Alexandre Duret-Lutz 2022-02-07 14:44:04 +01:00
parent 9b0a20412b
commit a3753e608b
10 changed files with 416 additions and 83 deletions
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17
spot/twaalgos/remprop.hh
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@ -1,5 +1,5 @@
// -*- coding: utf-8 -*-
// Copyright (C) 2015 Laboratoire de Recherche et Développement de
// Copyright (C) 2015, 2022 Laboratoire de Recherche et Développement de
// l'Epita (LRDE).
//
// This file is part of Spot, a model checking library.
@ -40,4 +40,19 @@ namespace spot
twa_graph_ptr strip(const_twa_graph_ptr aut) const;
};
/// \brief Interpret the "live" part of an automaton as finite automaton.
///
/// This functions assumes that there is a property "alive" is
/// that either true or false on all transitions, and that can only
/// switch from true to false.
///
/// Because Spot does not support finite automata, this creates a
/// state-based Büchi automaton where any states with a !alive
/// outgoing transition in the original automaton is accepting, and
/// all alive/!alive occurrences are removed.
SPOT_API twa_graph_ptr
to_finite(const_twa_graph_ptr aut, const char* alive = "alive");
}