Write a Blog >>
Sun 20 - Fri 25 October 2019 Athens, Greece
Thu 24 Oct 2019 15:07 - 15:30 at Olympia - Specification and Certification Chair(s): Colin Gordon

We develop powerful and general techniques to mechanically verify realistic programs that manipulate heap-represented graphs. These graphs can exhibit well-known organization principles, such as being a directed acyclic graph or a disjoint-forest; alternatively, these graphs can be totally unstructured. The common thread for such structures is that they exhibit deep intrinsic sharing and can be expressed using the language of graph theory. We construct a modular and general setup for reasoning about abstract mathematical graphs and use separation logic to define how such abstract graphs are represented concretely in the heap. We develop a Localize rule that enables modular reasoning about such programs, and show how this rule can support existential quantifiers in postconditions and smoothly handle modified program variables. We demonstrate the generality and power of our techniques by integrating them into the Verified Software Toolchain and certifying the correctness of seven graph-manipulating programs written in CompCert C, including a 400-line generational garbage collector for the CertiCoq project. While doing so, we identify two places where the semantics of C is too weak to define generational garbage collectors of the sort used in the OCaml runtime. Our proofs are entirely machine-checked in Coq.

Thu 24 Oct
Times are displayed in time zone: (GMT+03:00) Beirut change

14:00 - 15:30: OOPSLA - Specification and Certification at Olympia
Chair(s): Colin GordonDrexel University
splash-2019-oopsla14:00 - 14:22
Jia ChenUniversity of Texas at Austin, Jiayi WeiUniversity of Texas at Austin, Yu FengUniversity of California, Santa Barbara, Osbert BastaniUniversity of Pennsylvania, Isil DilligUniversity of Texas Austin
splash-2019-oopsla14:22 - 14:45
Timos AntonopoulosYale University, Eric KoskinenStevens Institute of Technology, Ton Chanh LeStevens Institute of Technology
splash-2019-oopsla14:45 - 15:07
Aleksandar NanevskiIMDEA Software Institute, Anindya BanerjeeIMDEA Software Institute, Germán Andrés DelbiancoIRIF - Université de Paris, Ignacio FábregasIMDEA Software Institute
Link to publication DOI
splash-2019-oopsla15:07 - 15:30
Shengyi WangNational University of Singapore, Qinxiang CaoShanghai Jiao Tong University, Anshuman MohanNational University of Singapore, Aquinas HoborNational University of Singapore
DOI Pre-print