Relational interprocedural verification of concurrent programs

We propose a general analysis method for recursive, concurrent programs that track effectively procedure calls and return in a concurrent context, even in the presence of unbounded recursion and infinite-state variables like integers. This method generalizes the relational interprocedural analysis of sequential programs to the concurrent case, and extends it to backward or coreachability analysis. We implemented it for programs with scalar variables and experimented with several classical synchronization protocols in order to illustrate the precision of our technique and also to analyze the approximations it performs.