Robustness Verification of Railway Level Crossing Control System by Formal Method

We analysis the requirements and the events flow of the railway level crossings management system, and formal a multilayer prototyping model using the Event-B. This model is fixed by the proving process of the invariants of safety and timing. We detect the defect of the management specifications on the veri-fication process, then revise the prototyping model by adding the new events and invariant to improve the robustness of the system.