Papers › Program Semantics and a Verification Technique for Knowledge-Based Multi-Agent Systems

Program Semantics and a Verification Technique for Knowledge-Based Multi-Agent Systems

28 Jun 2022arXiv:2206.13841links table onlyarchive 2025-07-28

Francesco Belardinelli, Ioana Boureanu, Vadim Malvone, Solofomampionona Fortunat Rajaona

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We give a relational and a weakest precondition semantics for "knowledge-based programs", i.e., programs that restrict observability of variables so as to richly express changes in the knowledge of agents who can or cannot observe said variables. Based on these knowledge-based programs, we define a program-epistemic logic to model complex epistemic properties of the execution of multi-agent systems. We translate the validity of program-epistemic logic formulae into first-order validity, using our weakest precondition semantics and an ingenious book-keeping of variable assignment. We implement our translation in Haskell in a general way (i.e., independently of the programs in the logical statements), and test this novel verification method for our new program-epistemic logic on a series of well-established examples.

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