A probabilistic dynamic logic

  • Authors:
  • Yishai A. Feldman;David Harel

  • Affiliations:
  • -;-

  • Venue:
  • STOC '82 Proceedings of the fourteenth annual ACM symposium on Theory of computing
  • Year:
  • 1982

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Abstract

A logic, Pr(DL), is presented, which enables reasoning about probabilistic programs or, alternatively, reasoning probabilistically about conventional programs. The syntax of Pr(DL) derives from Pratt's first-order dynamic logic and the semantics extends Kozen's semantics of probabilistic programs. An axiom system for Pr(DL) is presented and shown to be complete relative to an extension of first-order analysis. For discrete probabilities it is shown that first-order analysis actually suffices. Examples are presented, both of the expressive power of Pr(DL), and of a proof in the axiom system.