• Alexandre Duret-Lutz's avatar
    Improve SCC simplification by removing implied acceptance conditions. · d9fc75e9
    Alexandre Duret-Lutz authored
    Spot 0.7.1 used to need 190 acceptance conditions to translate the
    188 literature formulae.  With this patch we are down to 185.
    That's not an impressive, but there are only ~20 formulae that
    require more than 1 acceptance conditions; hence little room for
    improvement.
    
    * src/misc/bddlt.hh (bdd_hash): New function.
    * src/misc/accconv.hh, src/misc/accconv.cc: New files.
    * src/misc/Makefile.am: Add them.
    * src/tgbaalgos/scc.cc (scc_map::build_map): Adjust
    to record all combination of acceptance conditions occurring in a SCC.
    * src/tgbaalgos/scc.hh (scc_map::scc::useful_acc): Update description.
    * src/tgbaalgos/sccfilter.cc (scc_filter): Simplify acceptance
    conditions that are always implied by another acceptance
    conditions.  Previously, we only removed acceptance conditions
    that where always present in accepting SCCs.
    * src/tgbatest/sccsimpl.test: New file.
    * src/tgbatest/Makefile.am (TESTS): Add it.
    d9fc75e9
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