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ASP modulo CSP: The clingcon system

Published online by Cambridge University Press:  05 September 2012

MAX OSTROWSKI  and
TORSTEN SCHAUB
MAX OSTROWSKI
Affiliation:
Institut für Informatik, Universität Potsdam
TORSTEN SCHAUB
Affiliation:
Institut für Informatik, Universität Potsdam
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Abstract

We present the hybrid ASP solver clingcon, combining the simple modeling language and the high performance Boolean solving capacities of Answer Set Programming (ASP) with techniques for using non-Boolean constraints from the area of Constraint Programming (CP). The new clingcon system features an extended syntax supporting global constraints and optimize statements for constraint variables. The major technical innovation improves the interaction between ASP and CP solver through elaborated learning techniques based on irreducible inconsistent sets. A broad empirical evaluation shows that these techniques yield a performance improvement of an order of magnitude.

Type
Regular Papers
Information
Theory and Practice of Logic Programming , Volume 12 , Issue 4-5: 28th International Conference on Logic Programming , July 2012 , pp. 485 - 503
Copyright
Copyright © Cambridge University Press 2012

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