Symbolic Analysis for GSMP Models with One Stateful Clock

12 years 9 months ago
Symbolic Analysis for GSMP Models with One Stateful Clock
We consider the problem of verifying reachability properties of stochastic real-time systems modeled as generalized semi-Markov processes (GSMPs). The standard simulation-based techniques for GSMPs are not adequate for solving verification problems, and existing symbolic techniques either require memoryless distributions for firing times, or approximate the problem using discrete time or bounded horizon. In this paper, we present a symbolic solution for the case where firing times are random variables over a rich class of distributions, but only one event is allowed to retain its firing time when a discrete change occurs. The solution allows us to compute the probability that such a GSMP satisfies a property of the form “can the system reach a target, while staying within a set of safe states”. We report on illustrative examples and their analysis using our procedure.
Mikhail Bernadsky, Rajeev Alur
Added 07 Jun 2010
Updated 07 Jun 2010
Type Conference
Year 2007
Authors Mikhail Bernadsky, Rajeev Alur
Comments (0)