Incremental verification with mode variable invariants in state machines

Temesghen Kahsai, Pierre Loïc Garoche, Cesare Tinelli, Mike Whalen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

8 Scopus citations


We describe two complementary techniques to aid the automatic verification of safety properties of synchronous systems by model checking. A first technique allows the automatic generation of certain inductive invariants for mode variables. Such invariants are crucial in the verification of safety properties in systems with complex modal behavior. A second technique allows the simultaneous verification of multiple properties incrementally. Specifically, the outcome of a property - valid or invalid - is communicated to the user as soon as it is known. Moreover, each property proven valid is used immediately as an invariant in the model checking procedure to aid the verification of the remaining properties. We have implemented these techniques as new options in the Kind model checker. Experimental evidence shows that these two techniques combine synergistically to increase Kind's precision as well as its speed.

Original languageEnglish (US)
Title of host publicationNASA Formal Methods - 4th International Symposium, NFM 2012, Proceedings
Number of pages15
StatePublished - Apr 11 2012
Event4th NASA Formal Methods Symposium, NFM 2012 - Norfolk, VA, United States
Duration: Apr 3 2012Apr 5 2012

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume7226 LNCS
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349


Conference4th NASA Formal Methods Symposium, NFM 2012
Country/TerritoryUnited States
CityNorfolk, VA


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