Refinement and Reachability in Event_B
Identifieur interne : 005F27 ( Main/Exploration ); précédent : 005F26; suivant : 005F28Refinement and Reachability in Event_B
Auteurs : Jean-Raymond Abrial ; Dominique Cansell [France] ; Dominique Méry [France]Source :
English descriptors
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Abstract
Since the early 90's (after the seminal article of R. Back [4]), the refinement of stuttering steps [5] are performed by means of new actions (called here events) refining skip. It is shown in this article that such a refinement method is not always possible in the development of large systems. We shall instead use events refining some kind of non-deterministic actions maintaining the invariant (sometimes called keep). We show that such new refinements are completely safe. In a second part, we explain how such a mechanism can be used to express some reachability conditions that were otherwise expressed using some special temporal logic statements à la TLA [5] in a previous article [2]. Examples will be used to illustrate our proposals.
Affiliations:
- France
- Grand Est, Lorraine (région)
- Nancy
- Centre national de la recherche scientifique, Institut national de recherche en informatique et en automatique, Laboratoire lorrain de recherche en informatique et ses applications, Mosel (Loria), Université de Lorraine
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Le document en format XML
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