SS 2018 Software Verification LTL Satisfiability applied

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Presentation transcript:

SS 2018 Software Verification LTL Satisfiability applied Prof. Dr. Holger Schlingloff 1,2 Dr. Esteban Pavese 1 (1) Institut für Informatik der Humboldt Universität (2) Fraunhofer Institut für offene Kommunikationssysteme FOKUS

Remember? Properties vs. formulas? Dining Philosophers?

Example: Dining Philosophers Signature: P={philieating, forkiavailable, philihasLeftFork, philihasRightFork} Modelling as parallel FSMs Translating FSMs into LTL

Coding a Model in LTL Given a finite Kripke model M, define a linear temporal formula φM such that M||-  iff ||- (φM  ) Reminder: ||- (φM  ) iff (φM ) is unsatisfiable Reduction of model checking to (temporal) satisfiability Bounded model checking uses this approach (e.g. nuSMV with Zchaff)

Demo http://www.sc.ehu.es/jiwlucap/TTM.html