Model Checking Duration Calculus: A Practical Approach

摘要

Model checking of real-time systems with respect to Duration Calculus (DC) specifications requires the translation of DC formulae into automata-based semantics. This task is difficult to automate. 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 real world applications. Our algorithm significantly extends the subset of DC that can be handled. It decomposes DC specifications into sub-properties that can be verified independently. The decomposition bases on a novel distributive law for DC. We implemented the algorithm as part of our tool chain for the automated verification of systems comprising data, communication, and real-time aspects. Our translation facilitated a successful application of the tool chain on an industrial case study from the European Train Control System (ETCS).