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Integrating Cardinality Constraints into Constraint Logic Programming with Sets

Published online by Cambridge University Press:  09 November 2021

MAXIMILIANO CRISTIÁ Open the ORCID record for MAXIMILIANO CRISTIÁ [Opens in a new window]  and
GIANFRANCO ROSSI
MAXIMILIANO CRISTIÁ
Affiliation:
Universidad Nacional de Rosario and CIFASIS, Argentina (e-mail: cristia@cifasis-conicet.gov.ar)
GIANFRANCO ROSSI
Affiliation:
Università di Parma, Italy (e-mail: gianfranco.rossi@unipr.it)
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Abstract

Formal reasoning about finite sets and cardinality is important for many applications, including software verification, where very often one needs to reason about the size of a given data structure. The Constraint Logic Programming tool $$\{ log\} $$ provides a decision procedure for deciding the satisfiability of formulas involving very general forms of finite sets, although it does not provide cardinality constraints. In this paper we adapt and integrate a decision procedure for a theory of finite sets with cardinality into $$\{ log\} $$ . The proposed solver is proved to be a decision procedure for its formulas. Besides, the new CLP instance is implemented as part of the $$\{ log\} $$ tool. In turn, the implementation uses Howe and King’s Prolog SAT solver and Prolog’s CLP(Q) library, as an integer linear programming solver. The empirical evaluation of this implementation based on +250 real verification conditions shows that it can be useful in practice.

Under consideration in Theory and Practice of Logic Programming (TPLP)

Keywords

{log}set theorycardinalityformal verificationconstraint logic programming
Type
Original Article
Information
Theory and Practice of Logic Programming , Volume 23 , Issue 2 , March 2023 , pp. 468 - 502
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Copyright
© The Author(s), 2021. Published by Cambridge University Press

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