On formal semantics of statecharts as supported by STATEMATE

E. Mikk,Y. Lakhnech,C. Petersohn,M. Siegel

Published 1997 in FME 1997

ABSTRACT

We formalize the rigorous but informal description of the semantics of statecharts given by Harel and Naamad in [3] which corresponds to the semantics underlying the commercial tool STATEMATE. We closely follow [3] to increase confidence that our semantics actually corresponds to their informal description. In [3] the semantics is given by a detailed description of the so-called basic step algorithm. Based on a formalization of this basic step algorithm we associate to each statechart a transition system which defines its computations. This is the first step towards linking the language of statecharts as supported by STATEMATE with other automatic verification tools. Our formalization uses Z notation rather than "standard mathematics". This allows to structure the definition of the formal semantics and to use tools like type-checkers.

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