Alur, Rajeev; Henzinger, Thomas AIST Austria ; Vardi, Moshe Y
Traditional approaches to the algorithmic verification of real-time systems are limited to checking program correctness with respect to concrete timing properties (e.g., "message delivery within 10 milliseconds"). We address the more realistic and more ambitious problem of deriving symbolic constraints on the timing properties required of real-time systems (e.g., "message delivery within the time it takes to execute two assignment statements"). To model this problem, we introduce parametric timed automata -- finite-state machines whose transitions are constrained with parametric timing requirements. The emptiness question for parametric timed automata is central to the verification problem. On the negative side, we show that in general this question is undecidable. On the positive side, we provide algorithms for checking the emptiness of restricted classes of parametric timed automata. The practical relevance of these classes is illustrated with several verification examples. There remains a gap between the automata classes for which we know that emptiness is decidable and undecidable, respectively, and this gap is related to various hard and open problems of logic and automata theory.
592 - 601
STOC: Symposium on the Theory of Computing
Alur R, Henzinger TA, Vardi M. Parametric real-time reasoning. In: ACM; 1993:592-601. doi:10.1145/167088.167242
Alur, R., Henzinger, T. A., & Vardi, M. (1993). Parametric real-time reasoning (pp. 592–601). Presented at the STOC: Symposium on the Theory of Computing, ACM. https://doi.org/10.1145/167088.167242
Alur, Rajeev, Thomas A Henzinger, and Moshe Vardi. “Parametric Real-Time Reasoning,” 592–601. ACM, 1993. https://doi.org/10.1145/167088.167242.
R. Alur, T. A. Henzinger, and M. Vardi, “Parametric real-time reasoning,” presented at the STOC: Symposium on the Theory of Computing, 1993, pp. 592–601.
Alur R, Henzinger TA, Vardi M. 1993. Parametric real-time reasoning. STOC: Symposium on the Theory of Computing, 592–601.
Alur, Rajeev, et al. Parametric Real-Time Reasoning. ACM, 1993, pp. 592–601, doi:10.1145/167088.167242.