ETAPS 2019
Sat 6 - Thu 11 April 2019 Prague, Czech Republic
Thu 11 Apr 2019 15:00 - 15:30 at SUN I - Safety and Fault-tolerant Systems Chair(s): Rance Cleaveland

In this paper we introduce a notion of fault-tolerance distance between labeled transition systems. Intuitively, this notion of distance measures the degree of fault-tolerance exhibited by a candidate system. In practice, there are different kinds of fault-tolerance, here we restrict ourselves to the analysis of masking fault-tolerance because it is often a highly desirable goal for critical systems. Roughly speaking, a system is masking fault-tolerant when it is able to completely mask the faults, not allowing these faults to have any observable consequences for the users. We capture masking fault-tolerance via a simulation relation, which is accompanied by a corresponding game characterization. We enrich the resulting games with quantitative objectives to define the notion of masking fault-tolerance distance. Furthermore, we investigate the basic properties of this notion of masking distance, and we prove that it is a directed semimetric. We have implemented our approach in a prototype tool that automatically compute the masking distance between a nominal system and a fault-tolerant version of it. We have used this tool to measure the masking tolerance of multiple instances of several case studies.

Thu 11 Apr
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14:00 - 16:00: Safety and Fault-tolerant SystemsTACAS at SUN I
Chair(s): Rance CleavelandUniversity of Maryland
14:00 - 14:30
Talk
TACAS
Link to publication
14:30 - 15:00
Talk
TACAS
Ilina StoilkovskaVienna University of Technology , Igor KonnovInria Nancy, Josef WidderTU Wien, Florian ZulegerVienna University of Technology
Link to publication
15:00 - 15:30
Talk
TACAS
Pablo CastroDept. of Computer Science FCEFQyN, University of Rio Cuarto, Pedro D'Argenio, Ramiro Demasi, Luciano Putruele
Link to publication
15:30 - 16:00
Talk
TACAS
Philipp Dominik SchubertHeinz Nixdorf Institut, Paderborn University, Ben HermannUniversity of Paderborn, Eric BoddenHeinz Nixdorf Institut, Paderborn University and Fraunhofer IEM
Link to publication