Termination of simply moded logic programs with dynamic scheduling

Author:

Bossi Annalisa1,Etalle Sandro2,Rossi Sabina1,Smaus Jan-Georg3

Affiliation:

1. Università Ca' Foscari di Venezia, Venice, Italy

2. Universiteit Twente and CWI Amsterdam, Enschede, The Netherlands

3. Universität Freiburg, Germany

Abstract

In logic programming, dynamic scheduling indicates the feature by means of which the choice of the atom to be selected at each resolution step is done at runtime and does not follow a fixed selection rule such as the left-to-right one of Prolog. Input-consuming derivations were introduced to model dynamic scheduling while abstracting from the technical details. In this article, we provide a sufficient and necessary criterion for termination of input-consuming derivations of simply moded logic programs. The termination criterion we propose is based on a denotational semantics for partial derivations which is defined in the spirit of model-theoretic semantics previously proposed for left-to-right derivations.

Publisher

Association for Computing Machinery (ACM)

Subject

Computational Mathematics,Logic,General Computer Science,Theoretical Computer Science

Reference34 articles.

1. Apt K. R. 1997. From Logic Programming to Prolog. Prentice Hall London U.K.]] Apt K. R. 1997. From Logic Programming to Prolog. Prentice Hall London U.K.]]

2. Apt K. R. and Pedreschi D. 1994. Modular termination proofs for logic and pure Prolog programs. In Advances in Logic Programming Theory G. Levi Ed. Oxford University Press Oxford U.K. 183--229.]] Apt K. R. and Pedreschi D. 1994. Modular termination proofs for logic and pure Prolog programs. In Advances in Logic Programming Theory G. Levi Ed. Oxford University Press Oxford U.K. 183--229.]]

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