A concurrent program logic with a future and history

R Meyer, T Wies, S Wolff - Proceedings of the ACM on Programming …, 2022 - dl.acm.org
Proceedings of the ACM on Programming Languages, 2022dl.acm.org
Verifying fine-grained optimistic concurrent programs remains an open problem. Modern
program logics provide abstraction mechanisms and compositional reasoning principles to
deal with the inherent complexity. However, their use is mostly confined to pencil-and-paper
or mechanized proofs. We devise a new separation logic geared towards the lacking
automation. While local reasoning is known to be crucial for automation, we are the first to
show how to retain this locality for (i) reasoning about inductive properties without the need …
Verifying fine-grained optimistic concurrent programs remains an open problem. Modern program logics provide abstraction mechanisms and compositional reasoning principles to deal with the inherent complexity. However, their use is mostly confined to pencil-and-paper or mechanized proofs. We devise a new separation logic geared towards the lacking automation. While local reasoning is known to be crucial for automation, we are the first to show how to retain this locality for (i) reasoning about inductive properties without the need for ghost code, and (ii) reasoning about computation histories in hindsight. We implemented our new logic in a tool and used it to automatically verify challenging concurrent search structures that require inductive properties and hindsight reasoning, such as the Harris set.
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