Inferring Concise Specifications of APIs Singleton, John Rajan, Hridesh Leavens, Gary Rajan, Hridesh Cok, David
dc.contributor.department Computer Science 2019-07-12T13:39:42.000 2020-06-30T01:54:55Z 2020-06-30T01:54:55Z Tue Jan 01 00:00:00 UTC 2019 2019-05-16
dc.description.abstract <p>Modern software relies on libraries and uses them via application programming interfaces (APIs). Correct API usage as well as many software engineering tasks are enabled when APIs have formal specifications. In this work, we analyze the implementation of each method in an API to infer a formal postcondition. Conventional wisdom is that, if one has preconditions, then one can use the strongest postcondition predicate transformer (SP) to infer postconditions. However, SP yields postconditions that are exponentially large, which makes them difficult to use, either by humans or by tools. Our key idea is an algorithm that converts such exponentially large specifications into a form that is more concise and thus more usable. This is done by leveraging the structure of the specifications that result from the use of SP. We applied our technique to infer postconditions for over 2,300 methods in seven popular Java libraries. Our technique was able to infer specifications for 75.7% of these methods, each of which was verified using an Extended Static Checker. We also found that 84.6% of resulting specifications were less than 1/4 page (20 lines) in length. Our technique was able to reduce the length of SMT proofs needed for verifying implementations by 76.7% and reduced prover execution time by 26.7%.</p>
dc.description.comments <p>This is a pre-print made available through arxiv, doi: <a href="">10.13140/RG.2.2.29027.40480</a>.</p>
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dc.identifier.articleid 1035
dc.identifier.contextkey 14563210
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dc.language.iso en
dc.source.bitstream archive/|||Fri Jan 14 23:47:07 UTC 2022
dc.source.uri 10.13140/RG.2.2.29027.40480
dc.subject.disciplines Computer Sciences
dc.subject.disciplines Software Engineering
dc.title Inferring Concise Specifications of APIs
dc.type article
dc.type.genre article
dspace.entity.type Publication
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