Abstract Thetais a model checking framework conventionally based on abstraction refinement techniques. While abstraction is useful for a large number of verification problems, the over-reliance on the technique led toThetabeing unable to meaningfully adapt. Identifying this problem in previous years of SV-COMP has led us to createEmergenTheta, a sandbox for the new approaches we wantThetato support. By differentiating between mature and emerging techniques, we can experiment more freely without hurting the reliability of the overall framework. In this paper we detail the development route toEmergenTheta, and its first debut on SV-COMP’24 in the ReachSafety category.

Abstract Thetais a model checking framework, with a strong emphasis on effectively handling concurrency in software using abstraction refinement algorithms. In SV-COMP 2024, we use 1) an abstraction-aware partial order reduction; 2) a dynamic statement reduction technique; and 3) enhanced support for call stacks to handle recursive programs. We integrate these techniques in an improved architecture with inherent support for portfolio-based verification using dynamic algorithm selection, with a diverse selection of supported SMT solvers as well. In this paper we detail the advances ofThetaregarding concurrent and recursive software support.

Abstract Theta is a model checking framework based on abstraction refinement algorithms. In SV-COMP 2022, we introduce: 1) reasoning at the source-level via a direct translation from C programs; 2) support for concurrent programs with interleaving semantics; 3) mitigation for non-progressing refinement loops; 4) support for SMT-LIB-compliant solvers. We combine all of the aforementioned techniques into a portfolio with dynamic algorithm selection.