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An approach to generating provably correct sequential code from for- mally developed algorithmic designs is presented. Given an algorithm modelled in the Event-B formalism, we automatically translate the design into the SPARK programming language. Our translation builds upon Abrial's approach to the devel- opment of sequential programs from Event-B models. However, as well as gener- ating code, our approach also automatically generates code level specifications, i.e. SPARK pre- and post-conditions, along with loop invariants. In terms of the SPARK proof tools, having the loop invariants increases verification automation. A proto- type, known as E-SPARK, has been implemented as a plugin for the Rodin Platform (Event-B toolkit), and tested on a range of examples, i.e. searching, sorting and numeric calculations.

E-SPARK: Automated Generation of Provably Correct Code from Formally Verified Designs