Version 4.0
 - Add a Multithread version, called syrup (many glucose ;-)
   See SAT14 paper: Lazy Clause Exchange Policy for parallel SAT solvers.

 - Can work independently in sequential or with many cores

Version 3.0 (2013)
 - Add incremental features. 
    See SAT13 paper: Improving Glucose for Incremental SAT Solving with Assumptions: Application to MUS Extraction

 - Add certified UNSAT proof.

Version 2.3 (2012)
 - Add new restart strategy 
    See CP12 paper: Refining Restarts Strategies For SAT and UNSAT

 - Add additionnal features to speed the search

Version 2.0 (2011) 
 - Add additionnal features (freeze potential good clauses for one turn)

 - Based on Minisat 2.2

Version 1.0 (2009)
 - Based on Minisat 2.0
    First release of glucose.
    See ijcai 2009 paper: Predicting Learnt Clauses Quality in Modern SAT Solver