About: This paper defines a concept and a verification methodology for adding concurrency to a sequential refinement tower of abstract state machines, that is based on data refinement and a component structure. We have developed such a refinement tower for the Flashix file system earlier, from which we generate executable (C and Scala) Code. The question we answer in this paper, is how to add concurrency based on locks to such a refinement tower, without breaking the initial modular structure. We achieve this by just enhancing the relevant components, and adding intermediate atomicity refinements that complement the data refinements that are already there. We also give a verification methodology for such atomicity refinements.   Goto Sponge  NotDistinct  Permalink

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  • This paper defines a concept and a verification methodology for adding concurrency to a sequential refinement tower of abstract state machines, that is based on data refinement and a component structure. We have developed such a refinement tower for the Flashix file system earlier, from which we generate executable (C and Scala) Code. The question we answer in this paper, is how to add concurrency based on locks to such a refinement tower, without breaking the initial modular structure. We achieve this by just enhancing the relevant components, and adding intermediate atomicity refinements that complement the data refinements that are already there. We also give a verification methodology for such atomicity refinements.
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  • Models of computation
  • Formal methods
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