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twaalgos/cobuchi: Add dnf_to_nca() method

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* NEWS: Update.
* spot/twaalgos/cobuchi.hh: Declare dnf_to_nca().
* spot/twaalgos/cobuchi.cc: Implement it.
* tests/core/dca.test: Add tests.
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Alexandre GBAGUIDI AISSE 2017-06-17 21:31:43 +02:00
parent 50e99cdca7
commit f2616069be
4 changed files with 343 additions and 12 deletions
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32
spot/twaalgos/cobuchi.hh
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@ -26,9 +26,10 @@
namespace spot
{
/// A vector of nca_st_info is given as argument to nsa_to_nca(). Each
/// nca_st_info has information about a state that must be seen infinitely
/// often. For a state 's' visited infinitely often by a run, the information
/// A vector of nca_st_info is given as argument to nsa_to_nca() or
/// dnf_to_nca(). Each nca_st_info has information about a state that must be
/// seen infinitely often.
/// For a state 's' visited infinitely often by a run, the information
/// provided is:
/// - the clause number satisfied by the run (from left to right)
/// - the state number of 's'
@ -81,6 +82,31 @@ namespace spot
bool named_states = false,
vect_nca_info* nca_info = nullptr);
/// \brief Converts an aut. with acceptance in DNF to a nondet. co-Büchi aut.
///
/// This function converts the Rabin-like automaton into a Strett-like
/// automaton and then calls nsa_to_nca() on it. It is described in section
/// 3.2 of:
/** \verbatim
@Article{boker.2009.lcs,
author = {Udi Boker and Orna Kupferman},
title = {Co-Büching Them All},
booktitle = {Foundations of Software Science and Computational
Structures - 14th International Conference, FOSSACS 2011}
year = {2011},
pages = {184--198},
url = {\url{www.cs.huji.ac.il/~ornak/publications/fossacs11b.pdf}}
}
\endverbatim */
///
/// \a aut The automaton to convert.
/// \a named_states name each state for easier debugging.
/// \a nca_info retrieve information about state visited infinitely often.
SPOT_API twa_graph_ptr
dnf_to_nca(const const_twa_graph_ptr& aut,
bool named_states = false,
vect_nca_info* nca_info = nullptr);
/// \brief Converts any ω-automata to det. co-buchi (when possible)
///
/// The resulting automaton will always recognize at least the same language.