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Efficient modeling of concurrent systems in BMC

By Malay K. Ganai and Aarti Gupta


Abstract. We present an efficient method for modeling multi-threaded concurrent systems with shared variables and locks in Bounded Model Checking (BMC), and use it to improve the detection of safety properties such as data races. Previous approaches based on synchronous modeling of interleaving semantics do not scale up well due to the inherent asynchronism in those models. Instead, in our approach, we first create independent (uncoupled) models for each individual thread in the system, then explicitly add additional synchronization variables and constraints, incrementally, and only where such synchronization is needed to guarantee the (chosen) concurrency semantics (based on sequential consistency). We describe our modeling in detail and report verification results to demonstrate the efficacy of our approach on a complex case study.

Year: 2008
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