LSV Seminar

The LSV seminar takes place on Tuesday at 11:00 AM. The usual location is the conference room at Pavillon des Jardins (venue). If you wish to be informed by e-mail about upcoming seminars, please contact Stéphane Le Roux and Matthias Fuegger.

The seminar is open to public and does not require any form of registration.

Past Seminars

The stochastic logic CSL TA and its efficient model-checking

Tuesday, January 22 2019 at 11:00AM
Pavillon des Jardins
Susanna Donatelli (University of Torino, Italy and invited Prof. at LSV)

In this talk I will review the stochastic logic CSL TA, a logic that has been defined to model-check Continuous Time Markov Chains. CSL TA extends the well-known stochastic logic CSL by allowing path properties to be defined through a Timed Automaton (TA). The price of this extension is an increase in the cost of the model checking algorithm both in terms of memory and of solution time: the model checking of CSL requires to solve one of more CTMCs, that of CSL TA the solution of a Markov Regenerative Process. I will then discuss how we can efficiently model check CSL TA properties, in particular I will present a model-checking algorithm that adapts itself to the formula, so that the memory and computational cost for the model checking of a CSL TA formula naturally scales down to that of the standard CSL model checking algorithm, when the property specified by the TA is equivalent to a CSL one. The technique is based on the construction of the region graph of the timed automata and on a component-based technique for the computation of the steady-state probability of Markov regenerative processes. The presentation will be supported by a demo with the GreatSPN tool developed in Torino.

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