Several formalisms for concurrent computation have been proposed in recent years that incorporate means to express stochastic continuous-time dynamics and non-determinism. In this setting, some obscure phenomena are known to exist, related to the fact that schedulers may yield too pessimistic verification results, since current non-determinism can surprisingly be resolved based on prophesying the timing of future random events. This paper provides a thorough investigation of the problem, and it presents a solution: Based on a novel semantics of stochastic automata, we identify the class of schedulers strictly unable to prophesy, and show a path towards verification algorithms with respect to that class. The latter uses an encoding into the model of stochastic timed automata under arbitrary schedulers, for which model checking tool support has recently become available.
|Name||Lecture Notes in Computer Science|
|Other||Semantics, Logics, and Calculi: Essays Dedicated to Hanne Riis Nielson and Flemming Nielson on the Occasion of Their 60th Birthdays|
|Period||8/01/16 → 8/01/16|
|Other||8 Jan 2016|
- EC Grant Agreement nr.: FP7/295261
- EC Grant Agreement nr.: FP7/318490