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arXiv · 1306.1945

Automatic Abstraction in SMT-Based Unbounded Software Model Checking

Anvesh Komuravelli·Arie Gurfinkel·Sagar Chaki·Edmund M. Clarke
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Abstract

Software model checkers based on under-approximations and SMT solvers are very successful at verifying safety (i.e. reachability) properties. They combine two key ideas -- (a) "concreteness": a counterexample in an under-approximation is a counterexample in the original program as well, and (b) "generalization": a proof of safety of an under-approximation, produced by an SMT solver, are generalizable to proofs of safety of the original program. In this paper, we present a combination of "automatic abstraction" with the under-approximation-driven framework. We explore two iterative approaches for obtaining and refining abstractions -- "proof based" and "counterexample based" -- and show how they can be combined into a unified algorithm. To the best of our knowledge, this is the first application of Proof-Based Abstraction, primarily used to verify hardware, to Software Verification. We have implemented a prototype of the framework using Z3, and evaluate it on many benchmarks from the Software Verification Competition. We show experimentally that our combination is quite effective on hard instances.

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Anvesh Komuravelli, Arie Gurfinkel, Sagar Chaki, Edmund M. Clarke. 2013-06-08. Automatic Abstraction in SMT-Based Unbounded Software Model Checking. https://arxiv.org/abs/1306.1945

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