Three-Valued Spotlight Abstractions
نویسندگان
چکیده
Spotlight abstractions in verification focus on one specific component in a parallel system while disregarding most information about the rest. Existing spotlight abstractions are either based on overor on underapproximations of the parallel system, thus either preserving existential or universal properties. In this paper we present three-valued spotlight abstractions for parallel systems which preserve both existential and universal properties. We show correctness of the abstraction technique as well as present a procedure for abstraction refinement. The technique has been implemented on top of an existing three-valued model checker. Experimental results show that our technique can outperform existing predicate abstraction tools on certain classes of parallel systems.
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تاریخ انتشار 2009