probably bogus conversion to tgba
This was reported by @xblahoud
% ltlcross 'ltl3tela -f %f | autfilt --tgba > %O' -f 'F((G(a)) | (G((b) | (F(c)))))'
F((G(a)) | (G((b) | (F(c)))))
Running [P0]: ltl3tela -f 'F((G(a)) | (G((b) | (F(c)))))' | autfilt --tgba > 'lcr-o0-PxIRET'
Running [N0]: ltl3tela -f '!(F((G(a)) | (G((b) | (F(c))))))' | autfilt --tgba > 'lcr-o0-5Kv8d4'
Performing sanity checks and gathering statistics...
error: P0*N0 is nonempty; both automata accept the infinite word:
cycle{!a & !b & !c}
error: some error was detected during the above runs,
please search for 'error:' messages in the above trace.
Removing the --tgba
option gets rid of the issue.