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Derivation of algorithmic control structures in Event-B refinement

Derivation of algorithmic control structures in Event-B refinement
Derivation of algorithmic control structures in Event-B refinement
The Event-B formalism allows program specifications to be modelled at an abstract level and refined towards a concrete model. However, Event-B lacks explicit control flow structure and ordering is implicitly encoded in event guards. This makes it difficult to identify and apply rules for transformation of Event-B models to sequential code. This paper introduces a scheduling language to support the incremental derivation of algorithmic control structure for events as part of the Event-B refinement process. We provide intermediate control structures for non-deterministic iteration and choice that ease the transition from abstract specifications to sequential implementations. We present rules for transforming algorithmic structures to more concrete refinements. We illustrate our approach by applying our method to the Schorr-Waite graph marking algorithm.
Refinement, Program derivation, Event-B, Program verification
49-65
Dalvandi, Mohammadsadegh
6758fcf9-26c8-47d3-a1f0-4013a5dba8f9
Butler, Michael
54b9c2c7-2574-438e-9a36-6842a3d53ed0
Rezazadeh, Abdolbaghi
ab1aeb76-9d41-4b46-820c-cc66b631cb99
Dalvandi, Mohammadsadegh
6758fcf9-26c8-47d3-a1f0-4013a5dba8f9
Butler, Michael
54b9c2c7-2574-438e-9a36-6842a3d53ed0
Rezazadeh, Abdolbaghi
ab1aeb76-9d41-4b46-820c-cc66b631cb99

Dalvandi, Mohammadsadegh, Butler, Michael and Rezazadeh, Abdolbaghi (2017) Derivation of algorithmic control structures in Event-B refinement Science of Computer Programming, 148, pp. 49-65. (doi:10.1016/j.scico.2017.05.010).

Record type: Article

Abstract

The Event-B formalism allows program specifications to be modelled at an abstract level and refined towards a concrete model. However, Event-B lacks explicit control flow structure and ordering is implicitly encoded in event guards. This makes it difficult to identify and apply rules for transformation of Event-B models to sequential code. This paper introduces a scheduling language to support the incremental derivation of algorithmic control structure for events as part of the Event-B refinement process. We provide intermediate control structures for non-deterministic iteration and choice that ease the transition from abstract specifications to sequential implementations. We present rules for transforming algorithmic structures to more concrete refinements. We illustrate our approach by applying our method to the Schorr-Waite graph marking algorithm.

Text paper - Author's Original
Restricted to Repository staff only
Text 1-s2.0-S016764231730120X-main - Accepted Manuscript
Restricted to Repository staff only until 8 July 2018.

More information

Submitted date: 27 May 2017
Accepted/In Press date: 31 May 2017
e-pub ahead of print date: 8 July 2017
Published date: 15 November 2017
Keywords: Refinement, Program derivation, Event-B, Program verification
Organisations: Electronics & Computer Science, Electronic & Software Systems

Identifiers

Local EPrints ID: 412000
URI: http://eprints.soton.ac.uk/id/eprint/412000
PURE UUID: ff52a09c-efe0-49f9-9dcb-28dc89581df6
ORCID for Michael Butler: ORCID iD orcid.org/0000-0003-4642-5373

Catalogue record

Date deposited: 04 Jul 2017 16:31
Last modified: 15 Nov 2017 17:31

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Contributors

Author: Mohammadsadegh Dalvandi
Author: Michael Butler ORCID iD
Author: Abdolbaghi Rezazadeh

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