Bi-Weekly Talk: Tobias Winkler: Model Checking Temporal Properties of Recursive Probabilistic Programs

Wednesday, March 30, 2022, 10:30am

Location: Online session

Speaker: Tobias Winkler



Probabilistic pushdown systems (pPDS) are a standard operational model for programming languages involving discrete random choices, procedure calls, and returns. Temporal properties are useful for gaining insight into the chronological order of events during program execution. Existing approaches in the literature have focused mostly on omega-regular and LTL properties. In this talk, I consider the model checking problem of pPDS against omega-visibly pushdown languages that can be described by specification logics such as CaRet and are strictly more expressive than omega-regular properties. With these logical formulae, it is possible to specify properties that explicitly take the structured computations arising from procedural programs into account. For example, CaRet is able to match procedure calls with their corresponding future returns, and thus allows to express fundamental program properties like total and partial correctness.