Constitutes the refereed proceedings of the 13th International Conference on Verification, Model Checking, and Abstract Interpretation, VMCAI 2012, held in Philadelphia, PA, USA, in January 2012, co-located with the Symposium on Principles of Programming Languages, POPL 2012.

This volume constitutes the thoroughly refereed post-conference proceedings of the 5th International Conference on Verified Software: Theories, Tools, and Experiments, VSTTE 2013, held in Menlo Park, CA, USA, in May 2013. The 17 revised full papers presented were carefully revised and selected from 35 submissions. The papers address a wide range of topics including education, requirements modeling, specification languages, specification/verification case-studies, formal calculi, software design methods, automatic code generation, refinement methodologies, compositional analysis, verification...