Publication Type

Conference Proceeding Article

Version

publishedVersion

Publication Date

12-2012

Abstract

Stateful Timed CSP has been recently proposed to model (and verify) hierarchical real-time systems. It is an expressive modeling language which combines data structure/operations, complicated control flows (modeled using compositional process operators adopted from Timed CSP), and real-time requirements like deadline and within. It has been shown that Stateful Timed CSP is equivalent to closed timed automata with silent transitions, which implies that the timing constraints of Stateful Timed CSP can be captured using explicit tick events, through digitization. In order to tackle the state space explosion problem, we develop a BDD-based symbolic model checking approach to verify Stateful Timed CSP models. Due to the rich language features, BDD-based system encoding and verification is highly nontrivial. In this work, we show how to systematically encode Stateful Timed CSP models in BDD. Our approach consists of two steps. The first step is to identify maximum primitive components of a given system and then generate finite state machines (FSMs) from them, applying a set of symbolic firing rules. These FSMs are then encoded in the standard way. The second step is to compose the encoded components using a set of BDD-based compositional functions. The proposed method has been implemented in the PAT model checker. It supports properties like reachability, linear temporal logic, etc. The effectiveness of our technique is evaluated with benchmark systems.

Keywords

Model Check, Compositional Function, Linear Temporal Logic, Model Check Algorithm, State Space Explosion

Discipline

Programming Languages and Compilers | Software Engineering

Research Areas

Software and Cyber-Physical Systems

Publication

Proceedings of the 14th International Conference on Formal Engineering Methods, , ICFEM 2012, Kyoto, Japan, November 12-16

First Page

398

Last Page

413

ISBN

9783642342806

Identifier

10.1007/978-3-642-34281-3_28

Publisher

Springer Link

City or Country

Japan

Additional URL

https://doi.org/10.1007/978-3-642-34281-3_28

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