An (incorrect) implementation for symbolic strong bisimulation #1736
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This pull request is mostly a reminder to keep this branch alive and perhaps re-implement it after integrating OxiDD. Also to list the remaining issues.
Currently brp.mcrl2 shows an inconsistency between ltsconvert and ltsconvertsymbolic with a few hundred states. Ltsconvert claims the minimal bisimulation quotient to contain 293 states (which is most likely correct) whereas ltsconvertsymbolic finds a quotient with 337 states. Several other small examples show correct number of states. Also the implementation is far too slow to be applied to realistic examples, even 1394-fin.mcrl2 takes significant time.