Runtime verification for ultra-critical systems

  • Authors:
  • Lee Pike;Sebastian Niller;Nis Wegmann

  • Affiliations:
  • Galois, Inc.;National Institute of Aerospace;University of Copenhagen, Denmark

  • Venue:
  • RV'11 Proceedings of the Second international conference on Runtime verification
  • Year:
  • 2011

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Abstract

Runtime verification (RV) is a natural fit for ultra-critical systems, where correctness is imperative. In ultra-critical systems, even if the software is fault-free, because of the inherent unreliability of commodity hardware and the adversity of operational environments, processing units (and their hosted software) are replicated, and fault-tolerant algorithms are used to compare the outputs. We investigate both software monitoring in distributed fault-tolerant systems, as well as implementing fault-tolerance mechanisms using RV techniques. We describe the Copilot language and compiler, specifically designed for generating monitors for distributed, hard real-time systems, and we describe a case study in a Byzantine fault-tolerant airspeed sensor system.