New PDF release: Specification and Verification of Concurrent Systems

By Pierre America (auth.), C. Rattray MSc (eds.)

ISBN-10: 1447135342

ISBN-13: 9781447135340

ISBN-10: 3540195815

ISBN-13: 9783540195818

This quantity comprises papers provided on the BCS-FACS Workshop on Specification and Verification of Concurrent platforms hung on 6-8 July 1988, on the collage of Stirling, Scotland. Specification and verification innovations are taking part in an more and more very important function within the layout and creation of useful concurrent structures. the broader software of those innovations serves to spot tricky difficulties that require new ways to their resolution and additional advancements in specification and verification. The Workshop aimed to seize this interaction via delivering a discussion board for the trade of the adventure of educational and business specialists within the box. shows incorporated: surveys, unique learn, sensible experi­ ence with equipment, instruments and environments within the following or similar components: Object-oriented, strategy, info and common sense established versions and specifi­ cation equipment for concurrent platforms Verification of concurrent structures instruments and environments for the research of concurrent structures functions of specification languages to functional concurrent method layout and improvement. we must always prefer to thank the invited audio system and the entire authors of the papers whose paintings contributed to creating the Workshop so successful. We have been relatively proud of the foreign reaction to our demand papers. Invited audio system Pierre the US Philips study Laboratories college of Warwick Professor M. Joseph David Freestone British Telecom setting up Committee Charles Rattray Dr Muffy Thomas Dr Simon Jones Dr John Cooke Professor Ken Turner Derek Coleman Maurice Naftalin Dr Peter Scharbach vi Preface we want to aeknowledge the finaneial eontribution made by way of SD-Sysems Designers pie, Camberley, Surrey.

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Given a subset S of the set of state variables of a class specification, var[cl, we define an S-neutral relation to be a conjunction of equality relations, where (. v 5 ••• ) are the variables from Sand, for each s, Ps(u) is a formula with one free variable u over the language L+[c]. Notice that: (i) each 5-neutral relation is reflexive between pre- and post-states; (ii) the set of all 5-neutral relations is dosed under conjunction, since The neutral relations with which we augment a particular event specification are drawn from the set of those which are consistent with the predicates of that event: 47 Definition.

Another is [X=0, n=O], which is the only one that also satisfies the constraints for an initial state of FS. Note, however, that the substitution [X={l}, n=2] violates the explicit invariant, so not all structures are models. Showing consistency is usually quite straightforward, as long as the state specification is "type-correct" in the first place. This process is further simplified by the fact that we take all of our set eonstruetors and related operators to be "strongly-typed", based on the definitions originally formulated in [Abri al 1982].

E]. That is, for any event, if the pre-state enables the event to complete with no change to any variable then after the event we can infer exactly the same about the state as we could hefore. In particular, if there is no explicit postcondition then (... 1\ (v s=v~) 1\ ... } is in central[c. E]. Thus the event is interpreted as having no effect on the state, which justifies our earlier use of the term "query" to describe such events. Proposition. For any event C . E, if there is a var[c]-neutral relation n such that post[c.

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Specification and Verification of Concurrent Systems by Pierre America (auth.), C. Rattray MSc (eds.)


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