Verifying Procedural Programs via Constrained Rewriting Induction

Author:

Fuhs Carsten1,Kop Cynthia2,Nishida Naoki3

Affiliation:

1. Birkbeck, University of London, London, United Kingdom

2. University of Innsbruck and University of Copenhagen, København, S, Denmark

3. Nagoya University, Nagoya, Japan

Abstract

This article aims to develop a verification method for procedural programs via a transformation into logically constrained term rewriting systems (LCTRSs). To this end, we extend transformation methods based on integer term rewriting systems to handle arbitrary data types, global variables, function calls, and arrays, and to encode safety checks. Then we adapt existing rewriting induction methods to LCTRSs and propose a simple yet effective method to generalize equations. We show that we can automatically verify memory safety and prove correctness of realistic functions. Our approach proves equivalence between two implementations; thus, in contrast to other works, we do not require an explicit specification in a separate specification language.

Funder

Japan Society for the Promotion of Science

Austrian Science Fund (FWF) international project

Marie Skłodowska-Curie action “HORIP”

Nagoya University's Graduate Program for Real-World Data Circulation Leaders from MEXT, Japan

Publisher

Association for Computing Machinery (ACM)

Subject

Computational Mathematics,Logic,General Computer Science,Theoretical Computer Science

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