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- W3048199040 abstract "A (commercial or financial) contract is a mutual agreement to exchange resources such as money, goods and services amongst multiple parties. It expresses which actions may, must and must not be performed by its parties at which time, location and under which other conditions. We present a general framework for statically analyzing digital contracts, formal specifications of contracts, expressed in Contract Specification Language (CSL). Semantically, a CSL contract classifies traces of events into compliant (complete and successful) and noncompliant (incomplete or manifestly breached) ones. Our analysis framework is based on compositional abstract interpretation, which soundly approximates the set of traces a contract denotes by an abstract value in a lattice. The framework is parameterized by a lattice and an interpretation of contract primitives and combinators, satisfying certain requirements. It treats recursion by unrestricted unfolding. Employing Schmidt’s natural semantics approach, we interpret our inference system coinductively to account for infinite derivation trees, and prove their abstract interpretation sound. Finally, we show some example applications: participation analysis (who is possibly involved in a transfer to whom; who does definitely participate in a contract) and fairness analysis (bounds on how much is gained by each participant under any compliant execution of the contract). The semantics of CSL, the abstract interpretation framework and its correctness theorem, and the example analyses as instances of the abstract interpretation framework have all been mechanized in the Coq proof assistant." @default.
- W3048199040 created "2020-08-13" @default.
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- W3048199040 date "2020-01-01" @default.
- W3048199040 modified "2023-09-23" @default.
- W3048199040 title "A Formally Verified Static Analysis Framework for Compositional Contracts" @default.
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- W3048199040 doi "https://doi.org/10.1007/978-3-030-54455-3_42" @default.
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