An Executable Semantics of Clock Constraint Specification Language and its Applications

Min Zhang 1 Frédéric Mallet 2
2 AOSTE - Models and methods of analysis and optimization for systems with real-time and embedding constraints
CRISAM - Inria Sophia Antipolis - Méditerranée , Laboratoire I3S - COMRED - COMmunications, Réseaux, systèmes Embarqués et Distribués, Inria de Paris
Abstract : The Clock Constraint Specification Language (ccsl) is a language to specify logical and timed constraints between logical clocks. Given a set of clock constraints specified in ccsl, formal analysis is preferred to check if there exists a schedule that satisfies all the constraints, if the constraints are valid or not, and if the constraints satisfy expected properties. In this paper, we present a formal executable semantics of ccsl in rewriting logic and demonstrate some applications of the formal semantics to its formal analysis: 1) to automatically find bounded or periodic schedules that satisfy all the given constraints; 2) to simulate the execution of schedules with customized simulation policies; and 3) to verify LTL properties of ccsl constraints by bounded model checking. Compared with other existing modeling approaches, advantages with the rewriting-based semantics of ccsl are that we do not need to assume a bounded number of steps for the formalization, and we can exhaustively explore all the solutions within a given bound for the analysis.
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Min Zhang, Frédéric Mallet. An Executable Semantics of Clock Constraint Specification Language and its Applications. Formal Techniques for Safety-Critical Systems, Nov 2015, Luxembourg, Luxembourg. pp.37-51, ⟨10.1007/978-3-319-29510-7_2⟩. ⟨hal-01353824⟩



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