The ACM SIGPLAN Most Influential PLDI Paper Award is given each year for a paper that is ten years old and has been highly influential in the area of programming languages.
Rupak's 2001 paper, "Automatic Predicate Abstraction of C Programs," was coauthored with Thomas Ball, Todd Millstein, and Sriram Rajamani. The paper presented the predicate abstraction technology underlying the SLAM project. The technology is now part of Microsoft's Static Driver Verifier in the Windows Driver Development Kit. This is one of the earliest examples of automation of software verification on a large scale and the basis for numerous efforts to expand the domains that can be verified.