By Thai Son Hoang, Hironobu Kuruma, David Basin, Jean-Raymond Abrial (auth.), Michael Leuschel, Heike Wehrheim (eds.)
This publication constitutes the refereed court cases of the seventh overseas convention on built-in Formal tools, IFM 2009, held in Düsseldorf, Germany in February 2009.
The 21 revised complete papers provided including three invited papers have been conscientiously reviewed and chosen from fifty five submissions. The papers tackle the total spectrum of built-in formal equipment, starting from formal and semiformal modelling notations, semantics, verification, refinement, version differences to kind structures, logics, instruments and case studies.
Read Online or Download Integrated Formal Methods: 7th International Conference, IFM 2009, Düsseldorf, Germany, February 16-19, 2009. Proceedings PDF
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Extra info for Integrated Formal Methods: 7th International Conference, IFM 2009, Düsseldorf, Germany, February 16-19, 2009. Proceedings
E. the variable values represent the objects of the snapshot, their attributes values, their relations, etc. e. g. g. multiplicities) and textual OCL constraints. Pre and postconditions of operations and correctness properties are translated as additional constraints. Given this set of variables, domains and constraints, the ﬁnal CSP is organized as a sequence of subproblems to be solved by the constraint solver in order to ﬁnd a solution for the CSP, and thus, prove the desired correctness property.
3 Split Events to A Side and B Side Before decomposing the ﬁle transfer system into three subsystems, we must ﬁrst split some events into an A-part, representing behaviour on the sending side, and a B-part, representing behaviour on the receiving side. This is illustrated by the diagram in Fig. 10 which shows that the Start event is decomposed into StartA and StartB. The StartA event represents the sending side deciding to commence the transfer while the subsequent StartB event represents the receiving side recognising that the transfer has commenced.
E. it limits the possible set of legal snapshots of the model. OCL invariants are boolean OCL expressions deﬁned in the context of a speciﬁc type of the model and that must be satisﬁed by all instances of that type, in other words, the invariant is universally quantiﬁed over the objects of the type. e. by each possible Verifying UML/OCL Operation Contracts 47 invariantMinStock(Snapshot) : − % Get the list of Objects in Snapshot of type Product getObjects(Snapshot, ‘‘Product’’, Objects), ( foreach(Object, Objects) do % Iterate over all objects % Evaluate the invariant expression using this object as ‘‘self’’ evalRootMinStock(Snapshot, [Object], Result), % The invariant must evaluate to true Result #=1).