Abstract

. We describe an initial version of a system for mechanically checking the correctness proof of a concurrent system. Input to the system consists of the correctness properties, expressed in TLA (the temporal logic of actions), and their proofs, written in a humanly readable, hierarchically structured form. The system uses a mechanical verifier to check each step of the proof, translating the step's assertion into a theorem in the verifier's logic and its proof into instructions for the verifier. Checking is now done by LP (the Larch Prover), using two di#erent translations---one for action reasoning and one for temporal reasoning. The use of additional mechanical verifiers is planned. Our immediate goal is a practical system for mechanically checking proofs of behavioral properties of a concurrent system; we assume ordinary properties of the data structures used by the system. 1 Introduction TLA, the Temporal Logic of Actions, is a logic for specifying and reasoning about concurrent s...

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