simulation: do not purge unreachable states when recording implications
This fixes the incorrect output of tgba_determinize() reported yesterday by Reuben Rowe. * spot/twaalgos/simulation.cc: Do not purge unreachable states when recording implications. * tests/python/bugdet.py: New test case. * tests/Makefile.am: Add it. * THANKS: Add Reuben. * NEWS: Mention the bug.
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