David Parker
Senior Lecturer, University of Birmingham
[AKNP14] Alessandro Abate, Marta Kwiatkowska, Gethin Norman and David Parker. Probabilistic Model Checking of Labelled Markov Processes via Finite Approximate Bisimulations. In F. van Breugel, E. Kashefi, C. Palamidessi and J. Rutten (editors), Horizons of the Mind. A Tribute to Prakash Panangaden, volume 8464 of LNCS, pages 40-58, Springer. May 2014. [pdf] [bib] [Performs probabilistic model checking on continuous-state models using a finite-state abstraction which is then passed to PRISM.]
Downloads:  pdf pdf (360 KB)  bib bib
Notes: The original publication is available at www.springerlink.com.
Abstract. This paper concerns labelled Markov processes (LMPs), probabilistic models over uncountable state spaces originally introduced by Prakash Panangaden and colleagues. Motivated by the practical application of the LMP framework, we study its formal semantics and the relationship to similar models formulated in control theory. We consider notions of (exact and approximate) probabilistic bisimulation over LMPs and, drawing on methods from both formal verification and control theory, propose a simple technique to compute an approximate probabilistic bisimulation of a given LMP, where the resulting abstraction is characterised as a finite-state labelled Markov chain (LMC). This construction enables the application of automated quantitative verification and policy synthesis techniques over the obtained abstract model, which can be used to perform approximate analysis of the concrete LMP. We illustrate this process through a case study of a multi-room heating system that employs the probabilistic model checker PRISM.