Conference Papers: Formalizing a Framework for Dynamic Slicing of Program Dependence Graphs in Isabelle/HOL

Slicing is a widely-used technique with applications in e.g. compiler technology, debugging and software security. Thus verification of algorithms in these areas is often based on the correctness of slicing, which should ideally be proven independent of concrete programming languages and with the help of well-known verifying techniques such as theorem provers. As a first step in this direction, this contribution presents a framework for dynamic slicing, based on control flow and program dependence graphs and machine checked in Isabelle/HOL. Abstracting from concrete syntax we base the framework on a graph representation of the program fulfilling certain structural and well-formedness properties.