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  • Symbolic model-checking of stateful timed CSP using BDD and digitization

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    Accepted Manuscript (AM)
    Author(s)
    Nguyen, TK
    Sun, J
    Liu, Y
    Dong, JS
    Griffith University Author(s)
    Dong, Jin-Song
    Year published
    2012
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    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 ...
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    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.
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    Journal Title
    Lecture Notes in Computer Science
    Volume
    7635 LNCS
    DOI
    https://doi.org/10.1007/978-3-642-34281-3_28
    Copyright Statement
    © 2012 Springer International Publishing AG. This is an electronic version of an article published in Lecture Notes In Computer Science (LNCS), Vol 7635 LNCS pp. 398-413, 2012. Lecture Notes In Computer Science (LNCS) is available online at: http://link.springer.com// with the open URL of your article.
    Subject
    Software engineering not elsewhere classified
    Publication URI
    http://hdl.handle.net/10072/172903
    Collection
    • Journal articles

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