This Second Edition presents a practical framework for software development based on Event-B and refinement calculus, showing how formal models can be systematically transformed into verified executable programs. The book guides readers through the complete development process, from the formalisation of software requirements to model refinement, proof discharge, code synthesis, and implementation validation. The text introduces the Event-B method and its supporting tool ecosystem and demonstrates how refinement-based modelling can be used to construct reliable software systems incrementally. Particular emphasis is placed on the systematic derivation of Java implementations through automated code generation, together with the verification of sequential programs using the newly introduced PyEB framework in Python. Using a series of detailed case studies, the book illustrates how mathematical modelling techniques reduce ambiguity in requirements, support correctness-by-construction development, and provide rigorous reasoning about program behaviour throughout the software lifecycle.

Demonstrates how mathematics can be used to model, refine, and verify software unambiguously Provides an updated end-to-end view of Event-B software development from requirements to verified code Includes novel tool support for Event-B in Python, which is particularly suited for machine learning applications

Autorentext

Nestor Catano, Ph.D., is a faculty member at The University of Algarve, Portugal, in software engineering, computer science, and cybersecurity. He earned his Ph.D. and M.S. in Computer Science from Université Paris Cité, as well as an M.S. in Information and Cybersecurity from the University of California, Berkeley. Dr. Catano has more than 20 years of teaching experience and has worked as a researcher at universities around the world. His main research area is the use of formal methods for software engineering for safety and security applications, with a focus on refinement calculus and Event-B.

Inhalt

Introduction.- An Overview of Event-B and Refinement Calculus.- The Event-B Method for Software Development.- Sequential Program Development with Event-B.- Formal Software Development of Systems in Java.- Modelling and Verification of Algorithms in Python.