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Formal Verification of Termination Criteria for First-Order Recursive Functions

Authors: Cesar A. Muñoz, Mauricio Ayala-Rincón, Mariano M. Moscato, Aaron M. Dutle, Anthony J. Narkawicz, Ariane A. Almeida, Andréia B. Avelar, and Thiago M. Ferreira Ramos

Published in: LIPIcs, Volume 193, 12th International Conference on Interactive Theorem Proving (ITP 2021)


Abstract
This paper presents a formalization of several termination criteria for first-order recursive functions. The formalization, which is developed in the Prototype Verification System (PVS), includes the specification and proof of equivalence of semantic termination, Turing termination, size change principle, calling context graphs, and matrix-weighted graphs. These termination criteria are defined on a computational model that consists of a basic functional language called PVS0, which is an embedding of recursive first-order functions. Through this embedding, the native mechanism for checking termination of recursive functions in PVS could be soundly extended with semi-automatic termination criteria such as calling contexts graphs.

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Cesar A. Muñoz, Mauricio Ayala-Rincón, Mariano M. Moscato, Aaron M. Dutle, Anthony J. Narkawicz, Ariane A. Almeida, Andréia B. Avelar, and Thiago M. Ferreira Ramos. Formal Verification of Termination Criteria for First-Order Recursive Functions. In 12th International Conference on Interactive Theorem Proving (ITP 2021). Leibniz International Proceedings in Informatics (LIPIcs), Volume 193, pp. 27:1-27:17, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2021)


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@InProceedings{munoz_et_al:LIPIcs.ITP.2021.27,
  author =	{Mu\~{n}oz, Cesar A. and Ayala-Rinc\'{o}n, Mauricio and Moscato, Mariano M. and Dutle, Aaron M. and Narkawicz, Anthony J. and Almeida, Ariane A. and Avelar, Andr\'{e}ia B. and M. Ferreira Ramos, Thiago},
  title =	{{Formal Verification of Termination Criteria for First-Order Recursive Functions}},
  booktitle =	{12th International Conference on Interactive Theorem Proving (ITP 2021)},
  pages =	{27:1--27:17},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-188-7},
  ISSN =	{1868-8969},
  year =	{2021},
  volume =	{193},
  editor =	{Cohen, Liron and Kaliszyk, Cezary},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/LIPIcs.ITP.2021.27},
  URN =		{urn:nbn:de:0030-drops-139228},
  doi =		{10.4230/LIPIcs.ITP.2021.27},
  annote =	{Keywords: Formal Verification, Termination, Calling Context Graph, PVS}
}
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