for IAlph, OAlph being non empty set
for CRtfsm1, CRtfsm2 being non empty finite reduced connected Mealy-FSM over IAlph,OAlph st the carrier of CRtfsm1 misses the carrier of CRtfsm2 & CRtfsm1,CRtfsm2 -are_equivalent holds
CRtfsm1,CRtfsm2 -are_isomorphic