@article{vytiniotis-etal-2013-halo-178613, title = {HALO: Haskell to Logic through Denotational Semantics}, abstract = {Even well-typed programs can go wrong in modern functional languages, by encountering a pattern-match failure, or simply returning the wrong answer. An increasingly-popular response is to allow programmers to write contracts that express semantic properties, such as crash-freedom or some useful post-condition. We study the static verification of such contracts. Our main contribution is a novel translation to first-order logic of both Haskell programs, and contracts written in Haskell, all justified by denotational semantics. This translation enables us to prove that functions satisfy their contracts using an off-the-shelf first-order logic theorem prover. }, journal = {Acm Sigplan Notices}, author = {Vytiniotis, D. and Jones, S. P. and Rosén, Dan and Claessen, Koen}, year = {2013}, volume = {48}, number = {1}, pages = {431--442}, }