Publication Type

Conference Proceeding Article

Version

publishedVersion

Publication Date

8-2012

Abstract

Model checking timed systems through digitization is relatively easy, compared to zone-based approaches. The applicability of digitization, however, is limited mainly for two reasons, i.e., it is only sound for closed timed systems; and clock ticks cause state space explosion. The former is mild as many practical systems are subject to digitization. It has been shown that BDD-based techniques can be used to tackle the latter to some extent. In this work, we significantly improve the existing approaches by keeping the ticks simple in the BDD encoding. Taking advantage of the ‘simple’ nature of clock ticks, we fine-tune the encoding of ticks and are able to verify systems with many ticks. Furthermore, we develop a BDD library which supports not only encoding/verifying of timed state machines (through digitization) but also composing timed components using a rich set of composition functions. The usefulness and scalability of the library are demonstrated by supporting two languages, i.e., closed timed automata and Stateful Timed CSP.

Keywords

Model Check, Linear Temporal Logic, Symbolic Model Check, Time Automaton, State Space Explosion

Discipline

Programming Languages and Compilers | Software Engineering

Research Areas

Software and Cyber-Physical Systems

Publication

Proceedings of the 18th International Symposium Paris, France, 2012 August 27-31

First Page

326

Last Page

340

ISBN

9783642327582

Identifier

10.1007/978-3-642-32759-9_28

Publisher

Springer Link

City or Country

Paris, France

Additional URL

https://doi.org/10.1007/978-3-642-32759-9_28

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