On an Extensible Rule-Based Prover for Event-B

The Rodin platform [3] provides the practical setting to carry out modelling in Event-B. It seamlessly integrates modelling and proving, and provides an extensible and configurable mechanism that can be adapted to different application domains and development methods [1]. The Rodin platform provides a proving infrastructure that has certain limitations. Extending the prover with proof rules (rewrite and inference rules) requires a certain level of competence using the Java programming language as well as good knowledge of the toolset’s internal architecture. A further complication of this approach is that it became non-trivial to verify the soundness of the prover after adding new rules. This paper presents our approach when dealing with prover extensibility and soundness in the context of Event-B.