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Paper Abstract and Keywords
Presentation 2011-10-28 12:15
Incorporating Elementary Symmetric Clauses into SAT Solvers with Two-Watched-Literal Scheme
Yoshizane Hino, Masahiko Sakai, Toshiki Sakabe, Keiichirou Kusakari, Naoki Nishida (Nagoya Univ.) SS2011-38
Abstract (in Japanese) (See Japanese page) 
(in English) Umano et al.\ introduced elementary symmetric clauses (ES-clauses) into CNF formula in 2010 as a method for improving SAT-solver efficiency.
Since their experimental SAT solver is implemented based on two counters that maintain the number of true (false, respectively) literals,
it has a drawback that backtracks are heavy.
Thus much faster solvers are expected due to light backtracks if it is possible to implement them based on watching two literals for each clause,
called two watched literals adopted by modern SAT solvers like Minisat.
However, watching two literals for ES-clauses are not enough for efficiency.

This paper proposes a method watching two literals for each ordinary clause and watching all literals for each ES-clause, and evaluates this by incorporating it into Minisat.
Keyword (in Japanese) (See Japanese page) 
(in English) SAT Solver / Elementary Symmetric Clauses / Two Watched Literals / All Watched Literals / / / /  
Reference Info. IEICE Tech. Rep., vol. 111, no. 268, SS2011-38, pp. 67-72, Oct. 2011.
Paper # SS2011-38 
Date of Issue 2011-10-20 (SS) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF SS2011-38

Conference Information
Committee SS  
Conference Date 2011-10-27 - 2011-10-28 
Place (in Japanese) (See Japanese page) 
Place (in English) JAIST 
Topics (in Japanese) (See Japanese page) 
Topics (in English) General topics 
Paper Information
Registration To SS 
Conference Code 2011-10-SS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Incorporating Elementary Symmetric Clauses into SAT Solvers with Two-Watched-Literal Scheme 
Sub Title (in English)  
Keyword(1) SAT Solver  
Keyword(2) Elementary Symmetric Clauses  
Keyword(3) Two Watched Literals  
Keyword(4) All Watched Literals  
Keyword(5)  
Keyword(6)  
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1st Author's Name Yoshizane Hino  
1st Author's Affiliation Nagoya University (Nagoya Univ.)
2nd Author's Name Masahiko Sakai  
2nd Author's Affiliation Nagoya University (Nagoya Univ.)
3rd Author's Name Toshiki Sakabe  
3rd Author's Affiliation Nagoya University (Nagoya Univ.)
4th Author's Name Keiichirou Kusakari  
4th Author's Affiliation Nagoya University (Nagoya Univ.)
5th Author's Name Naoki Nishida  
5th Author's Affiliation Nagoya University (Nagoya Univ.)
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Speaker Author-1 
Date Time 2011-10-28 12:15:00 
Presentation Time 30 minutes 
Registration for SS 
Paper # SS2011-38 
Volume (vol) vol.111 
Number (no) no.268 
Page pp.67-72 
#Pages 6 
Date of Issue 2011-10-20 (SS) 

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