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TCAS software verification using constraint programming

Published online by Cambridge University Press:  26 July 2012

Arnaud Gotlieb
Arnaud Gotlieb*
Affiliation:
INRIA – Rennes – Bretagne Atlantique, 35042 Rennes Cedex, France; e-mail: Arnaud.Gotlieb@inria.fr Certus Software V&V Centre, Simula Research Laboratory, Lysaker, Norway; e-mail: arnaud@simula.no
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Abstract

Safety-critical software must be thoroughly verified before being exploited in commercial applications. In particular, any TCAS (Traffic Alert and Collision Avoidance System) implementation must be verified against safety properties extracted from the anti-collision theory that regulates the controlled airspace. This verification step is currently realized with manual code reviews and testing. In our work, we explore the capabilities of Constraint Programming for automated software verification and testing. We built a dedicated constraint solving procedure that combines constraint propagation with Linear Programming to solve conditional disjunctive constraint systems over bounded integers extracted from computer programs and safety properties. An experience we made on verifying a publicly available TCAS component implementation against a set of safety-critical properties showed that this approach is viable and efficient.

Type
Articles
Information
The Knowledge Engineering Review , Volume 27 , Special Issue 3: Constraint Programming for Air Traffic Management , 26 July 2012 , pp. 343 - 360
Copyright
Copyright © Cambridge University Press 2012

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