Documents

DOI

Research into C verification often ignores that the C standard leaves the evaluation order of expressions unspecified, and assigns undefined behavior to write-write or read-write conflicts in subexpressions—so called “sequence point violations”. These aspects should be accounted for in verification because C compilers exploit them. We present a verification condition generator (vcgen) that enables one to semi-automatically prove the absence of undefined behavior in a given C program for any evaluation order. The key novelty of our approach is a symbolic execution algorithm that computes a frame at the same time as a postcondition. The frame is used to automatically determine how resources should be distributed among subexpressions. We prove correctness of our vcgen with respect to a new monadic definitional semantics of a subset of C. This semantics is modular and gives a concise account of non-determinism in C. We have implemented our vcgen as a tactic in the Coq interactive theorem prover, and have proved correctness of it using a separation logic for the new monadic definitional semantics of a subset of C.
Original languageEnglish
Title of host publicationProgramming Languages and Systems - 28th European Symposium on Programming, ESOP 2019, Held as Part of the European Joint Conferences on Theory and Practice of Software, ETAPS 2019, Proceedings
EditorsLuís Caires
Place of PublicationCham
PublisherSpringer Verlag
Pages60-87
Number of pages28
ISBN (Electronic)978-3-030-17184-1
ISBN (Print)978-3-030-17183-4
DOIs
Publication statusPublished - 2019
Event28th European Symposium on Programming, ESOP 2019 Held as Part of the European Joint Conferences on Theory and Practice of Software, ETAPS 2019 - Prague, Czech Republic
Duration: 6 Apr 201911 Apr 2019

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume11423 LNCS
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349

Conference

Conference28th European Symposium on Programming, ESOP 2019 Held as Part of the European Joint Conferences on Theory and Practice of Software, ETAPS 2019
CountryCzech Republic
CityPrague
Period6/04/1911/04/19

ID: 53706162