Animating Event B Models by Formal Data Models

Idir Aït-Sadoune (1) , Yamine Aït-Ameur (1)

1 LISI [Poitiers] - Laboratoire d'informatique scientifique et industrielle [EA 1232]

We present a formal approach allowing to animate event B formal models. In- variants, deadlock freeness properties are expressed and proved on these models. This paper presents an approach that suggests to complete the proof activity in the event B method by animation activity. The obtained animator may be used to check if the event B models obtained fulfill user requirements, or to provide a help to the developer when describing its formal event B models and particularly in defining event B invariants and guards. More pre- cisely, event B models are translated into data models expressed in the EXPRESS formal data modeling technique. The obtained data models are instantiated and provide an anima- tion of the original B models. Following this approach, it becomes possible to trigger event B models, which themselves trigger entity instantiation on the EXPRESS side. As a further step, we show that the B models can be used as a monitoring system raising alarms in case of incorrect systems behavior. The proposed approach is operationally implemented in the B2EXPRESS tool which handles animation of event B models. It has been experimented for the validation of multimodal human interfaces in the context of VERBATIM project

Domaines: Modélisation et simulation

Idir Aït-Sadoune, Yamine Aït-Ameur. Animating Event B Models by Formal Data Models. International Symposium On Leveraging Applications of Formal Methods, Verification and Validation (ISOLA 2008), Oct 2008, Kassandra, Greece. pp.37-55, ⟨10.1007/978-3-540-88479-8_4⟩. ⟨hal-00634402⟩