By Frédéric Boniol, Virginie Wiels, Yamine Ait Ameur, Klaus-Dieter Schewe (eds.)
This quantity comprises lawsuits of the Case research song, held on the 4th foreign convention, ABZ 2014, in Toulouse, France, in June 2014. The eleven papers offered have been rigorously reviewed and chosen from a variety of submissions. They use varied formal ideas: B, ASM, Fiacre. in addition they suggest other kinds of verification akin to evidence, version checking, try out new release, run-time tracking, and simulation.
Read or Download ABZ 2014: The Landing Gear Case Study: Case Study Track, Held at the 4th International Conference on Abstract State Machines, Alloy, B, TLA, VDM, and Z, Toulouse, France, June 2-6, 2014. Proceedings PDF
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Extra resources for ABZ 2014: The Landing Gear Case Study: Case Study Track, Held at the 4th International Conference on Abstract State Machines, Alloy, B, TLA, VDM, and Z, Toulouse, France, June 2-6, 2014. Proceedings
J0 j1 . . are inﬁnite. The states Sik and Sj¦k are the corresponding states of interest. They represent the end points of the corresponding computation segments (those of interest) for which the equivalence is deﬁned in terms of a relation between their corresponding locations (those of interest). 4 Models Chain of the LGS In the following sections we present the ﬁve steps of the reﬁnement process for modeling the case study2 . Fig. 1 depicts the relationship existing between the models and, for each model, the system elements introduced with respect to the previous model.
Model Checking. In the ground model we have been able to verify four normal mode requirements among those reported in the case study: R11 bis, R12 bis, R21 , and R22 . For example, requirement R11 bis requires that, when the command line is working (normal mode), if the landing gear command handle has been pushed DOWN and stays DOWN, then eventually the gears will be locked down and the doors will be seen closed. = EXTENDING))) //R22 First Reﬁnement: Adding the Electro-Valves and the Cylinders In this model we have reﬁned the ground model by adding the representation of the electro-valves and of the cylinders.
Fig. 2 shows the simulation trace of the wrong ground Modeling and Analyzing Using ASMs: The Landing Gear System Case Study Insert a symbol of HandleStatus in [UP, DOWN] for handle: UP