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Cooking String-Integer Conversions with Noodles

Authors Vojtěch Havlena , Lukáš Holík , Ondřej Lengál , Juraj Síč

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Author Details

Vojtěch Havlena
  • Brno University of Technology, Czech Republic
Lukáš Holík
  • Brno University of Technology, Czech Republic
Ondřej Lengál
  • Brno University of Technology, Czech Republic
Juraj Síč
  • Brno University of Technology, Czech Republic

Funding

This work was supported by the Czech Ministry of Education, Youth and Sports ERC.CZ project LL1908, the Czech Science Foundation project 23-07565S, and the FIT BUT internal project FIT-S-23-8151.

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Vojtěch Havlena, Lukáš Holík, Ondřej Lengál, and Juraj Síč. Cooking String-Integer Conversions with Noodles. In 27th International Conference on Theory and Applications of Satisfiability Testing (SAT 2024). Leibniz International Proceedings in Informatics (LIPIcs), Volume 305, pp. 14:1-14:19, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2024) https://doi.org/10.4230/LIPIcs.SAT.2024.14

Abstract

We propose a method for efficient handling string constraints with string-integer conversions. It extends the recently introduced stabilization-based procedure for solving string (dis)equations with regular and length constraints. Our approach is to translate the conversions into a linear integer arithmetic formula, together with regular constraints and word equations. We have integrated it into the string solver Z3-Noodler, and our experiments show that it is competitive and on some established benchmarks even several orders of magnitude faster than the state of the art.

Subject Classification

ACM Subject Classification
  • Theory of computation → Logic and verification
Keywords
  • string solving
  • string conversions
  • SMT solving

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References

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