Building on the DEPLOY Legacy: Code Generation and Simulation
This work provides incremental improvements for researchers and practitioners in formal methods and cyber-physical systems simulation.
The paper tackles the co-simulation of cyber-physical systems using Event-B by extending code generation to include state-machine diagrams and enabling concurrent simulation of generated code in a single task, with results including instrumentation to control non-deterministic transition rates.
The RODIN, and DEPLOY projects laid solid foundations for further theoretical, and practical (methodological and tooling) advances with Event-B. Our current interest is the co-simulation of cyber-physical systems using Event-B. Using this approach we aim to simulate various features of the environment separately, in order to exercise deployable code. This paper has two contributions, the first is the extension of the code generation work of DEPLOY, where we add the ability to generate code from Event-B state-machine diagrams. The second describes how we may use code, generated from state-machines, to simulate the environment, and simulate concurrently executing state-machines, in a single task. We show how we can instrument the code to guide the simulation, by controlling the relative rate that non-deterministic transitions are traversed in the simulation.