Roland Meyer

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With the introduction of UML 2.0, many improvements to diagrams have been incorporated into the language. Some of the major changes were applied to sequence diagrams, which were enhanced with most of the concepts from ITU-T’s Message Sequence Charts, and more. In this paper, we introduce a formal semantics for most concepts of sequence diagrams by means of(More)
The behavior of embedded hardware and software systems is determined by at least three dimensions: control flow, data aspects, and real-time requirements. To specify the different dimensions of a system with the best-suited techniques, the formal language CSP-OZ-DC (Hoenicke and Maier, 2005) integrates communicating sequential processes (CSP) (Hoare, 1985),(More)
We investigate the class PBD of π-Calculus processes that are bounded in the function depth. First, we show that boundedness in depth has an intuitive characterisation when we understand processes as graphs: a process is bounded in depth if and only if the length of the simple paths is bounded. The proof is based on a new normal form for the π-Calculus(More)
Basic concepts and terminology for trustworthy software systems are discussed. Our discussion of definitions for terms in the domain of trustworthy software systems is based on former achievements in dependable, trustworthy and survivable systems. We base our discussion on the established literature and on approved standards. These concepts are discussed in(More)
We introduce Petruchio, a tool for computing Petri net translations of dynamic networks. To cater for unbounded architectures beyond the capabilities of existing implementations, the principle fixedpoint engine runs interleaved with coverability queries. We discuss algorithmic enhancements and provide experimental evidence that Petruchio copes with models(More)
Model checking of real-time systems against Duration Calculus (DC) specifications requires the translation of DC formulae into automata-based semantics. The existing algorithms provide a limited DC coverage and do not support compositional verification. We propose a translation algorithm that advances the applicability of model checking tools to realistic(More)