A CPN/B method transformation framework for railway safety rules formal validation

Abstract

This paper presents a "CPN/B method" based process for railway systems safety analysis. Achieving interoperability through the European Rail Traffic Management System (ERTMS/ETCS) is facing difficulties in railway safety assessment due to the interaction of national and European operating specifications. These specifications have been modeled using several formalisms, which makes it is extremely hard to preserve all requirements when switching between different formalisms. However, this problem, crucial for efficient progress in railway safety research, has received very little attention in the literature. In this respect, the purpose of this contribution is to provide a methodology to demonstrate safety in railway systems by converting CPN models, widely used in modeling, into B abstract machines. It aims at enabling a stronger combination of formal design techniques and analysis tools able to cope with the real complexity of systems and automatically prove that safety properties are unambiguous, consistent and not contradictory, considering an industrial railway context.

Computer Games as Virtual Environments for Safety-Critical Software Validation

“…We also intent to use the Java interface [22] of the ProB [23] animator and model checker for B-Method, Event-B and several other FM to be able to connect with SCSC on the formal specification and not implementation level. Regarding B-Method, the CM can also benefit from a combination of B-Method and Petri nets, pioneered in [24], [25] and further extended to other Petri net dialects and railway domain in works such as [26] or [27].…”