Abstraction Refinement with Path Constraints for 3-Valued Bounded Model Checking

  • Nils TimmEmail author
  • Stefan Gruner
Conference paper
Part of the Communications in Computer and Information Science book series (CCIS, volume 1008)


We present an abstraction refinement-based technique for checking safety properties of software. The technique employs predicate abstraction and SAT-based 3-valued bounded model checking. In contrast to classical refinement techniques where a single state space model is iteratively explored and refined with predicates, our approach is as follows: We use a coarsely-abstracted model of the full state space where we check for abstract witness paths for the property of interest. For each detected abstract witness we construct a partial model whose state space is restricted to refinements of the witness only. On the partial models we check whether the witness is real or spurious. We eliminate spurious witnesses in the full model via constraints, which do not increase the state space complexity. Our technique terminates when a real witness in a partial model can be detected, or no more witnesses in the full model exist. The approach enables verification with a reduced state space complexity.


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Authors and Affiliations

  1. 1.Department of Computer ScienceUniversity of PretoriaPretoriaSouth Africa

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