A Refinement-based Formal Development of Cyber-physical Railway Signalling Systems

For years, formal methods have been successfully applied in the railway domain to formally demonstrate safety of systems. Despite that, little has done field address cyber-physical nature modern signalling In this article, we present an approach for a development systems that is based on refinement-based modelling and proof-based verification. Our utilises Event-B specification language together with hybrid system communication patterns developing generic model can be further refined capture specific system. The main technical contribution article refinement train other sub-systems. complete was proved ensure safe rolling stock separation prevent their derailment. Furthermore, demonstrates advantage systems, which enables problem decomposition turn reduction verification effort.