Automatic Verification of Directory-Based Consistency Protocols

  • Authors:
  • Parosh Aziz Abdulla;Giorgio Delzanno;Ahmed Rezine

  • Affiliations:
  • Uppsala University, Sweden;Università di Genova, Italy;University of Paris 7, France

  • Venue:
  • RP '09 Proceedings of the 3rd International Workshop on Reachability Problems
  • Year:
  • 2009

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Abstract

We propose a symbolic verification method for directory-based consistency protocols working for an arbitrary number of controlled resources and competing processes. We use a graph-based language to specify in a uniform way both client/server interaction schemes and manipulation of directories that contain the access rights of individual clients. Graph transformations model the dynamics of a given protocol. Universally quantified conditions defined on the labels of edges incident to a given node are used to model inspection of directories, invalidation loops and integrity conditions. Our verification procedure computes an approximated backward reachability analysis by using a symbolic representation of sets of configurations. Termination is ensured by using the theory of well-quasi orderings.