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Transition systems for model generators—A unifying approach

Published online by Cambridge University Press:  06 July 2011

YULIYA LIERLER
Affiliation:
Department of Computer Science, University of Kentucky, Lexington, KY 40506-0633, USA (e-mail: yuliya@cs.uky.edu, mirek@cs.uky.edu)
MIROSLAW TRUSZCZYNSKI
Affiliation:
Department of Computer Science, University of Kentucky, Lexington, KY 40506-0633, USA (e-mail: yuliya@cs.uky.edu, mirek@cs.uky.edu)

Abstract

A fundamental task for propositional logic is to compute models of propositional formulas. Programs developed for this task are called satisfiability solvers. We show that transition systems introduced by Nieuwenhuis, Oliveras, and Tinelli to model and analyze satisfiability solvers can be adapted for solvers developed for two other propositional formalisms: logic programming under the answer-set semantics, and the logic PC(ID). We show that in each case the task of computing models can be seen as “satisfiability modulo answer-set programming,” where the goal is to find a model of a theory that also is an answer set of a certain program. The unifying perspective we develop shows, in particular, that solvers clasp and minisat(id) are closely related despite being developed for different formalisms, one for answer-set programming and the latter for the logic PC(ID).

Type
Regular Papers
Copyright
Copyright © Cambridge University Press 2011

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