... set of all spontaneous transitions of the SNS, and Forc denotes the set of all forced transitions of the SNS For any transition t, there can be three kinds of markings: the marking on incoming ... are in their initial levels and some of them execute an initial transition, as indicated at the beginning of the diagram The verification process ends when all signals achieve their final state, indicated ... Verification using o User-Friendly Interfaces,” in Design, Automation and Test in Europe, pp 167–172, IEEE Computer Society Press, 1999 [5] V Vyatkin and H.-M Hanisch, “Application of visual specifications...