Hoare Logics for Time Bounds

Maximilian Paul Louis Haslbeck Tobias Nipkow

We study three different Hoare logics for reasoning about time bounds of imperative programs and formalize them in Isabelle/HOL: a classical Hoare like logic due to Nielson, a logic with potentials due to Carbonneaux et al. and a separation logic following work by Atkey, Chagueraud and Pottier. These logics are formally shown to be sound and complete. Verification condition generators are developed and are shown sound and complete too. We also consider variants of the systems where we abstract from multiplicative constants in the running time bounds, thus supporting a big-O style of reasoning. Finally we compare the expressive power of the three systems.

Open access DOI
Author pdf
Isabelle theories in the Archive of Formal Proofs


author={Maximilian Paul Louis Haslbeck and Tobias Nipkow},
title={Hoare Logics for Time Bounds},
booktitle={Tools and Algorithms for the Construction and Analysis of Systems (TACAS 2018)},
editor={M. Huisman and D. Beyer},