Download Abstract State Machines, Alloy, B, TLA, VDM, and Z: 4th by Yamine Ait Ameur, Klaus-Dieter Schewe PDF

By Yamine Ait Ameur, Klaus-Dieter Schewe

This ebook constitutes the completely refereed complaints of the 4th foreign convention on summary country Machines, B, TLA, VDM and Z, which happened in Toulouse, France, in June 2014. The thirteen complete papers provided including three invited talks and 19 brief papers have been conscientiously reviewed and chosen from eighty one submissions. The ABZ convention sequence is devoted to the cross-fertilization of six comparable state-based and machine-based formal tools: summary kingdom Machines (ASM), Alloy, B, TLA, VDM and Z. They proportion a typical conceptual origin and are generic in either academia and for the layout and research of and software program platforms. the most objective of this convention sequence is to give a contribution to the mixing of those formal tools, clarifying their commonalities and ameliorations to higher know how to mix various ways for achieving many of the initiatives in modeling, experimental validation and mathematical verification of trustworthy high quality hardware/software systems.

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23–42. Springer, Heidelberg (2009) 8. html 9. : An incremental refinement approach to a development of a flashbased file system in Event-B (October 2010) 10. Samsung Electronics. com 11. html 12. : KIV - Overview and VerifyThis Competition. Software Tools for Technology Transfer (to appear, 2014) 13. : Modular Refinement for Submachines of ASMs. -D. ) ABZ 2014. LNCS, vol. 8477, pp. 188–203. Springer, Heidelberg (2014) 14. : A Formal Model of a Virtual Filesystem Switch. In: Proc. of Software and Systems Modeling (SSV), pp.

Another feature that is non-trivial to specify is the effect of caching when using the real VFS implementation. The difference between our non-caching VFS implementation and the one in Linux would be visible to the user if a power-cut occurs, as not all previous writes would have been persisted on flash. For two simpler caching related problems (the write buffer of Sec. 4 and the mapping of Sec. 5) we already successfully applied a refinement theory that incorporates power-cuts [33]. Development of a Verified Flash File System 23 References 1.

Not all concepts that we have encountered have direct counterparts in the implementation. Here, we benefit from the refinement-based approach that supports well isolating difficult aspects of the verification in dedicated models. For example, the abstract log as specified in LogFS is actually encoded in the headers of nodes in UBIFS. It proved beneficial that we have initially started with the core concepts of the UBIFS file system and derived an abstract model [39]. This model has served as an anchor-point to incrementally develop the rest of the model hierarchy.

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