Event-B Examples

This page is for listing available example Event-B/Rodin projects.

Year 2009

Development of a Network Topology Discovery Algorithm

By Hoang, Thai Son and Basin, David and Kuruma, Hironobu and Abrial, Jean-Raymond.

This paper and this Rodin development is another version of the "Link State Routing Development" presented below.

Year 2008

Link State Routing Development

By Hoang, Thai Son and Basin, David and Kuruma, Hironobu and Abrial, Jean-Raymond.

Modelling and proof of a Tree-structured File System

By Damchoom, Kriangsak and Butler, Michael and Abrial, Jean-Raymond.

We present a verified model of a tree-structured file system which was carried out using Event-B and the Rodin platform. The model is focused on basic functionalities affecting the tree structure including create, copy, delete and move. This work is aimed at constructing a clear and accurate model with all proof obligations discharged. While constructing the model of a file system, we begin with an abstract model of a file system and subsequently refine it by adding more details through refinement steps. We have found that careful formulation of invariants and useful theorems that can be reused for discharging similar proof obligations make models simpler and easier to prove.

Deliverable D8 D10.1 "Teaching Materials"

By Abrial, Jean-Raymond and Hoang, Thai Son and Schmalz, Matthias.

Year 2007

Redevelopment of an Industrial Case Study Using Event-B and Rodin

From Rezazadeh, Abdolbaghi and Butler, Michael and Evans, Neil.

CDIS is a commercial air traffic information system that was developed using formal methods 15 years ago by Praxis, and it is still in operation today. This system is an example of an industrial scale system that has been developed using formal methods. In particular, the functional requirements of the system were specified using VVSL -- a variant of VDM. A subset of the original specification has been chosen to be reconstructed on the Rodin platform based on the new Event-B formalism. The goal of our reconstruction was to overcome three key difficulties of the original formalisation, namely the difficulty of comprehending the original specification, the lack of any mechanical proof of the consistency of the specification and the difficulty of dealing with distribution and atomicity refinement. In this paper we elucidate how a new formal notation and tool can help to overcome these difficulties.