Eternity Variables to Simulate Specifications

  • Authors:
  • Wim H. Hesselink

  • Affiliations:
  • -

  • Venue:
  • MPC '02 Proceedings of the 6th International Conference on Mathematics of Program Construction
  • Year:
  • 2002

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Abstract

Simulation of specifications is introduced as a unification and generalisation of refinement mappings, history variables, forward simulations, prophecy variables, and backward simulations.Eternity variables are introduced as a more powerful alternative for prophecy variables and backward simulations. This formalism is semantically complete: every simulation is a composition of a forward simulation, an extension with eternity variables, and a refinement mapping. The finiteness and continuity conditions of the Abadi-Lamport Theorem are unnecessary for this result.