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  • Towards an Efficient SAT Encoding for Temporal Reasoning

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    Author(s)
    Pham, Duc Nghia
    Thornton, John
    Sattar, Abdul
    Griffith University Author(s)
    Sattar, Abdul
    Year published
    2006
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    Abstract
    In this paper, we investigate how an IA network can be effectively encoded into the SAT domain.We propose two basic approaches to modelling an IA network as a CSP: one represents the relations between intervals as variables and the other represents the relations between end-points of intervals as variables. By combining these two approaches with three different SAT encoding schemes, we produced six encoding schemes for converting IA to SAT. These encodings were empirically studied using randomly generated IA problems of sizes ranging from 20 to 100 nodes. A general conclusion we draw from these experimental results ...
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    In this paper, we investigate how an IA network can be effectively encoded into the SAT domain.We propose two basic approaches to modelling an IA network as a CSP: one represents the relations between intervals as variables and the other represents the relations between end-points of intervals as variables. By combining these two approaches with three different SAT encoding schemes, we produced six encoding schemes for converting IA to SAT. These encodings were empirically studied using randomly generated IA problems of sizes ranging from 20 to 100 nodes. A general conclusion we draw from these experimental results is that encoding IA into SAT produces better results than existing approaches. Further, we observe that the phase transition region maps directly from the IA encoding to each SAT encoding, but, surprisingly, the location of the hard region varies according to the encoding scheme. Our results also show a fixed performance ranking order over the various encoding schemes.
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    Conference Title
    PRINCIPLES AND PRACTICE OF CONSTRAINT PROGRAMMING - CP 2006
    Volume
    4204
    Publisher URI
    http://www.springer.com/east/home/generic/search/results?SGWID=5-40109-22-173681505-0
    Copyright Statement
    © 2006 Springer. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. The original publication is available at www.springerlink.com
    Publication URI
    http://hdl.handle.net/10072/13101
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    • Conference outputs

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