Partial Order Reduction on Concurrent Probabilistic Programs

TitlePartial Order Reduction on Concurrent Probabilistic Programs
Publication TypeConference Paper
Year of Publication2004
AuthorsD'Argenio, PR, Niebert, P
Conference Name1st International Conference on Quantitative Evaluation of Systems (QEST 2004)
PublisherIEEE Computer Society
ISBN Number0-7695-2185-1
AbstractPartial order reduction has been used to alleviate the state explosion problem in model checkers for nondeterministic systems. The method relies on exploring only a fragment of the full state space of a program that is enough to assess the validity of a property. In this paper, we discuss partial order reduction for probabilistic programs represented as Markov decision processes. The technique we propose preserves probabilistic quantification of reachability properties and is based on partial order reduction techniques for (non probabilistic) branching temporal logic. We also show that techniques for (non probabilistic) linear temporal logics are not correct for probabilistic reachability and that in turn our method is not sufficient for probabilistic CTL. We conjecture that our reduction technique also preserves maximum and minimum probabilities of next-free LTL properties.
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