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Improving Automatic Confluence Analysis of Rewrite Systems by Redundant Rules

Julian Nagele, Bertram Felgenhauer, and Aart Middeldorp

Proceedings of the 26th International Conference on Rewriting Techniques and Applications (RTA 2015), Leibniz International Proceedings in Informatics 36, pp. 257 – 268, 2015.

Abstract

We describe how to utilize redundant rewrite rules, i.e., rules that can be simulated by other rules, when (dis)proving confluence of term rewrite systems. We demonstrate how automatic confluence provers benefit from the addition as well as the removal of redundant rules. Due to their simplicity, our transformations were easy to formalize in a proof assistant and are thus amenable to certification. Experimental results show the surprising gain in power.

 

  PDF |    doi:10.4230/LIPIcs.RTA.2015.257  |  © Creative Commons License – CC   BY

BibTeX 

@inproceedings{JNBFAM-RTA15,
author = "Julian Nagele and Bertram Felgenhauer and Aart Middeldorp",
title = "Improving Automatic Confluence Analysis of Rewrite Systems
by Redundant Rules",
booktitle = "Proceedings of the 26th International Conference on Rewriting
Techniques and Applications (RTA 2015)",
editor = "Maribel Fern{\'a}ndez",
series = "Leibniz International Proceedings in Informatics"
volume = 36,
pages = "257--268",
year = 2015,
doi = "10.4230/LIPIcs.RTA.2015.257"
}
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