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The Computer Journal Advance Access originally published online on July 21, 2006
The Computer Journal 2006 49(6):710-730; doi:10.1093/comjnl/bxl039
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© The Author 2006. Published by Oxford University Press on behalf of The British Computer Society. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Verifying an ATM Protocol Using a Combination of Formal Techniques*

Vlad Rusu

IRISA/INRIA Rennes Campus de Beaulieu, 35042 Rennes Cedex, France

E-mail: rusu{at}irisa.fr

This paper describes a methodology and a case study in formal verification. The case study is the SSCOP protocol, a member of the ATM adaptation layer whose main role is to perform a reliable data transfer over an unreliable communication medium. The methodology involves (i) simulation for initial debugging; (ii) partial-order abstraction that preserves the properties of interest and (iii) compositional verification of the properties at the abstract level using the PVS theorem prover. Steps (ii) and (iii) guarantee that the properties still hold on the whole (composed, concrete) system. The value of the approach lies in adapting and integrating several existing formal techniques into a new verification methodology that is able to deal with real case studies.

Key Words: Compositional • deductive • partial-order based verification


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