Process-Local Static Analysis of Synchronous Processes

We develop a modular approach to statically analyse imperative processes communicating by synchronous message passing. The approach is modular in that it only needs to analyze one process at a time, but will in general have to do so repeatedly. The approach combines lattice-valued regular expressions to capture network communication with a dedicated shuffle operator for composing individual process analysis results. We present both a soundness proof and a prototype implementation of the approach for a synchronous subset of the Go programming language. Overall our approach tackles the combinatorial explosion of concurrent programs by suitable static analysis approximations, thereby lifting traditional sequential analysis techniques to a concurrent setting.