A verification task of proving the equivalence of two descriptions of the same device is examined for
the case, when one of the descriptions is partially defined. In this case, the verification task is reduced to
checking out whether logical descriptions are equivalent on the domain of the incompletely defined one.
Simulation-based approach to solving this task for different vector forms of description representations is
proposed. Fast Boolean computations over Boolean and ternary vectors having big sizes underlie the offered