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Verifying Distributed Protocols using MSC-Assertions, Run-time Monitoring, and Automatic Test Generation

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2 Author(s)
Drusinsky, D. ; Naval Postgraduate Sch., Monterey ; Man-Tak Shing

This paper addresses the need for formal specification and runtime verification of system-level requirements of distributed reactive systems. It describes a formalism for specifying global system behaviors in terms of message sequence chart assertions and a technique for the evaluation of the likelihood of success of a distributed protocol under non-trivial communication conditions via discrete event simulation and runtime execution monitoring. We constructed a proof-of-concept prototype for the leader-election algorithm within a 4-node ring network. The prototype consists of the following components: (i) an OMNeT++ model of the network using non-trivial communication conditions, (ii) C+ + code for the network agents, (Hi) a system-level assertion stipulating the formal requirement for a correct, time- bound, leader election, (iv) simulation of the formal assertion, (v) automatic scenario generation, and (vi) run-time monitoring of the formal assertion and stochastic-based estimation of the likelihood of success of this assertion under the specified communication conditions.

Published in:

Rapid System Prototyping, 2007. RSP 2007. 18th IEEE/IFIP International Workshop on

Date of Conference:

28-30 May 2007