• Alexandre Duret-Lutz's avatar
    Optimize tgba_tba_proxy and tgba_sba_proxy for states that share · 96cc3a3f
    Alexandre Duret-Lutz authored
    an acceptance condition on all outgoing transitions.
    This was motivated by experiments from Rüdiger Ehlers, showing
    that "ltl2ba -f 'a U (b U c)'" outperformed "ltl2tgba -f -N -R3 'a
    U (b U c)'".  With this change and the previous one, it is no
    longer the case.
    * src/tgba/tgbatba.cc (tgba_tba_proxy_succ_iterator::aut_): Store
    a pointer to the source automaton and...
    (tgba_tba_proxy_succ_iterator::sync_): ... use it in an extra
    optimization step to gather the acceptance conditions common
    to all outgoing transitions of the destination state, and pretend
    they are on the current (ingoing) transition.
    (tgba_tba_proxy::succ_iter): Pass the
    source automaton to the constructed iterator.
    * src/tgbatest/spotlbtt.test: Test -f -N -R3 -r7.
    * src/tgbatest/ltl2tgba.test: Add a test case for 'a U (b U c)'.
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