Abstract
A concurrent data-structure implementation is considered non-blocking if it meets one of three following liveness criteria: wait-freedom, lock-freedom, or obstruction-freedom. Developers of non-blocking algorithms aim to meet these criteria. However, to date their proofs for non-trivial algorithms have been only manual pencil-and-paper semi-formal proofs. This paper proposes the first fully automatic tool that allows developers to ensure that their algorithms are indeed non-blocking. Our tool uses rely-guarantee reasoning while overcoming the technical challenge of sound reasoning in the presence of interdependent liveness properties.
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