Abstract
PACSR, a probabilistic extension of the real-time process algebra ACSR, is presented. The extension is built upon a novel treatment of the notion of a resource. In ACSR, resources are used to model contention in accessing physical devices. Here, resources are invested with the ability to fail and are associated with a probability of failure. The resulting formalism allows one to perform probabilistic analysis of real-time system specifications in the presence of resource failures. A probabilistic variant of Hennessy-Milner logic with until is presented. The logic features an until operator which is parameterized by both a probabilistic constraint and a regular expression over observable actions. This style of parameterization allows the application of probabilistic constraints to complex execution fragments. A model-checking algorithm for the proposed logic is also given. Finally, PACSR and the logic are illustrated with a telecommunications example.
This work was supported in part by grants AFOSR F49620-95-1-0508, ARO DAAH04-95-1-0092, NSF CCR-9415346, NSF CCR-9619910, and ONR N00014-97-1-0505 (MURI).
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Philippou, A., Cleaveland, R., Lee, I., Smolka, S., Sokolsky, O. (1998). Probabilistic resource failure in real-time process algebra. In: Sangiorgi, D., de Simone, R. (eds) CONCUR'98 Concurrency Theory. CONCUR 1998. Lecture Notes in Computer Science, vol 1466. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0055637
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DOI: https://doi.org/10.1007/BFb0055637
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