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zlktree: add a paritization based on zielonka trees

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* spot/twaalgos/zlktree.hh,
spot/twaalgos/zlktree.cc (zielonka_tree_transform): New function.
* tests/python/_zlktree.ipynb: Test it on three examples.
This commit is contained in:
Alexandre Duret-Lutz 2021-08-04 11:30:19 +02:00
parent c924c63255
commit 8c5bb6c2eb
3 changed files with 877 additions and 11 deletions
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15
spot/twaalgos/zlktree.hh
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@ -37,7 +37,7 @@ namespace spot
{
public:
/// \brief Build a Zielonka tree from the acceptance condition.
zielonka_tree(acc_cond& cond);
zielonka_tree(const acc_cond& cond);
/// \brief The number of branches in the Zielonka tree.
///
@ -129,4 +129,17 @@ namespace spot
bool has_streett_shape_ = true;
};
/// \ingroup twa_acc_transform
/// \brief Paritize an automaton using Zielonka tree.
///
/// This corresponds to the application of Section 3 of
/// \cite casares.21.icalp
///
/// The resulting automaton has a parity acceptance that is either
/// "min odd" or "min even", depending on the original acceptance.
/// It may uses up to n+1 colors if the input automaton has n
/// colors. Finally, it is colored, i.e., each output transition
/// has exactly one color.
SPOT_API
twa_graph_ptr zielonka_tree_transform(const const_twa_graph_ptr& aut);
}