Abstract
We encountered some limits when using the GreatSPN model checker on life-size models, both in time and space complexity. Even when the exponential blow-up of state space size is adequately handled by the tool thanks to the use of a canonization function that allows to exploit system symmetries, time complexity becomes critical. Indeed the canonization procedure is computationally expensive, and verification time for a single property may exceed 2 days (without exhausting memory).
Using the GreatSPN model-checking core, we have built a distributed model-checker, dmcG, to benefit from the aggregated resources of a cluster. We built this distributed version using a flexible software architecture dedicated to parallel and distributed model-checking, thus allowing full reuse of GreatSPN source code at a low development cost. We report performances on several specifications that show we reach the theoretical linear speedup w.r.t. the number of nodes. Furthermore, through intensive use of multi-threading, performances on multi-processors architectures reach a speedup linear to the number of processors.
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Hamez, A., Kordon, F., Thierry-Mieg, Y., Legond-Aubry, F. (2007). dmcG: A Distributed Symbolic Model Checker Based on GreatSPN. In: Kleijn, J., Yakovlev, A. (eds) Petri Nets and Other Models of Concurrency – ICATPN 2007. ICATPN 2007. Lecture Notes in Computer Science, vol 4546. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-73094-1_29
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DOI: https://doi.org/10.1007/978-3-540-73094-1_29
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