The VerCors tool set: Verification of parallel and concurrent software

Abstract

This paper reports on the VerCors tool set for verifying parallel and concurrent software. Its main characteristics are (i) that it can verify programs under different concurrency models, written in high-level programming languages, such as for example in Java, OpenCL and OpenMP; and (ii) that it can reason not only about race freedom and memory safety, but also about functional correctness. VerCors builds on top of existing verification technology, notably the Viper framework, by transforming the verification problem of programs written in a high-level programming language into a verification problem in the intermediate language of Viper. This paper presents three examples that illustrate how VerCors support verifying functional correctness of three different concurrency features: heterogeneous concurrency, kernels using barriers and atomic operations, and compiler directives for parallelisation.