Publication details

Automatic Verification of Competitive Stochastic Systems



Year of publication 2013
Type Article in Periodical
Magazine / Source Formal Methods in System Design
MU Faculty or unit

Faculty of Informatics

Field Informatics
Keywords Quantitative verification; Probabilistic model checking; Stochastic multi-player games; Probabilistic temporal logic
Description We present automatic verification techniques for the modelling and analysis of probabilistic systems that incorporate competitive behaviour. These systems are modelled as turn-based stochastic multi-player games, in which the players can either collaborate or compete in order to achieve a particular goal. We define a temporal logic called rPATL for expressing quantitative properties of stochastic multi-player games. This logic allows us to reason about the collective ability of a set of players to achieve a goal relating to the probability of an event's occurrence or the expected amount of cost/reward accumulated. We give an algorithm for verifying properties expressed in this logic and implement the techniques in a probabilistic model checker, as an extension of the PRISM tool. We demonstrate the applicability and efficiency of our methods by deploying them to analyse and detect potential weaknesses in a variety of large case studies, including algorithms for energy management in Microgrids and collective decision making for autonomous systems.
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