Spec# is a programming system that facilitates the development of correct software. The Spec# language extends C# with contracts that allow programmers to express their design intent in the code. The Spec# tool suite consists of a compiler that emits run-time checks for contracts, a static program verifier that attempts to mathematically prove the correctness of programs, and an integration into the Visual Studio development environment. Spec# shows how contracts and verifiers can be integrated seamlessly into the software development process. This paper reflects on the six-year history of the Spec# project, scientific contributions it has made, remaining challenges for tools that seek to establish program correctness, and prospects of incorporating verification into everyday software engineering.
Copyright © 2007 by the Association for Computing Machinery, Inc. Permission to make digital or hard copies of part or all of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, to republish, to post on servers, or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from Publications Dept, ACM Inc., fax +1 (212) 869-0481, or firstname.lastname@example.org. The definitive version of this paper can be found at ACM's Digital Library --http://www.acm.org/dl/.