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PROCEEDINGS OF THE ACM ON programMING LANGUAGES-PACMPL 2018年第OOPSLA期2卷 1–27页

作者： Wang, Yuepeng Wang, Xinyu Dillig, Isil Univ Texas Austin Austin TX 78712 USA

This paper proposes relational program synthesis, a new problem that concerns synthesizing one or more programs that collectively satisfy a relational specification. As a dual of relational program verification, relational program synthesis is an important problem that has many practical applications, such as automated program inversion and automatic generation of comparators. However, this relational synthesis problem introduces new challenges over its non-relational counterpart due to the combinatorially larger search space. As a first step towards solving this problem, this paper presents a synthesis technique that combines the counterexample-guided inductive synthesis framework with a novel inductive synthesis algorithm that is based on relational version space learning. We have implemented the proposed technique in a framework called RELISH, which can be instantiated to different application domains by providing a suitable domain-specific language and the relevant relational specification. We have used the RELISH framework to build relational synthesizers to automatically generate string encoders/decoders as well as comparators, and we evaluate our tool on several benchmarks taken from prior work and online forums. Our experimental results show that the proposed technique can solve almost all of these benchmarks and that it significantly outperforms EUSoLvEn, a generic synthesis framework that won the general track of the most recent SyGuS competition.

关键词： relational program synthesis Version Space Learning Counterexample Guided Inductive synthesis

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