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Automated Analysis of an Audio Control Protocol Using UPPAAL,

Fulltext:


Authors:

Johan Bengtsson , W.O.David Griffioen , Kåre J. Kristofferssen , Kim Guldstrand Larsen , Fredrik Larsson , Paul Pettersson, Wang Yi

Publication Type:

Journal article

Venue:

Journal of Logic and Algebraic Programming,


Abstract

In this paper we present a case-study in which the tool UPPAAL is extended and applied to verify an Audio-Control Protocol developed by Philips. The size of the protocol studied in this paper is significantly larger than case studies, including various abstract versions of the same protocol without bus-collision handling, reported previously in the community of real-time verification. We have checked that the protocol will function correctly if the timing error of its components is bound to +/-5%, and incorrectly if the error is +/- 6%. In addition, using UPPAAL's ability of generating diagnostic traces, we have studied an erroneous version of the protocol actually implemented by Philips, and constructed a possible execution sequence explaining the error.During the case-study, UPPAAL was extended with the notion of {em committed locations}. It allows for accurate modelling of atomic behaviours, and more importantly, it is utilised to guide the state-space exploration of the model checker to avoid exploring unnecessary interleavings of independent transitions. Our experimental results demonstrate considerable time and space-savings of the modified model checking algorithm. In fact, due to the huge time and memory-requirement, it was impossible to check a simple reachability property of the protocol before the introduction of committed locations, and now it takes only seconds.

Bibtex

@article{Bengtsson2394,
author = {Johan Bengtsson and W.O.David Griffioen and K{\aa}re J. Kristofferssen and Kim Guldstrand Larsen and Fredrik Larsson and Paul Pettersson and Wang Yi},
title = {Automated Analysis of an Audio Control Protocol Using UPPAAL,},
volume = {52-53},
pages = {163--181},
month = {July},
year = {2002},
journal = {Journal of Logic and Algebraic Programming,},
url = {http://www.es.mdu.se/publications/2394-}
}