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29th International Conference on Logic-Based Program Synthesis and Transformation (LOPSTR)

作者： Drabent, Wlodzimierz Polish Acad Sci Inst Comp Sci Warsaw Poland Linkoping Univ IDA Linkoping Sweden

ISBN: (纸本)9783030452599;9783030452605

Logic programming is a declarative programming paradigm. Programming language Prolog makes logic programming possible, at least to a substantial extent. However the Prolog debugger works solely in terms of the operational semantics. So it is incompatible with declarative programming. This report discusses this issue and tries to find how the debugger may be used from the declarative point of view. The results are rather not encouraging. Also, the box model of Byrd, used by the debugger, is explained in terms of SLD-resolution.

关键词： declarative diagnosis/algorithmic debugging Prolog declarative programming Program correctness Program completeness

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Correctness and Completeness of Logic Programs

引用

ACM TRANSACTIONS ON COMPUTATIONAL LOGIC 2016年第3期17卷 18-18页

作者： Drabent, Wlodzimierz Polish Acad Sci Inst Comp Sci Ul Jana Kazimierza 5 PL-01248 Warsaw Poland Linkoping Univ S-58183 Linkoping Sweden

We discuss proving correctness and completeness of definite clause logic programs. We propose a method for proving completeness, while for proving correctness we employ a method that should be well known but is often neglected. Also, we show how to prove completeness and correctness in the presence of SLD-tree pruning, and point out that approximate specifications simplify specifications and proofs. We compare the proof methods to declarative diagnosis (algorithmic debugging), showing that approximate specifications eliminate a major drawback of the latter. We argue that our proof methods reflect natural declarative thinking about programs, and that they can be used, formally or informally, in everyday programming.

关键词： Logic programming declarative programming program completeness program correctness specifications declarative diagnosis/algorithmic debugging

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