xSAT - Copyright (c) 2016, Bruno Schmitt - UC Berkeley / UFRGS (boschmitt@inf.ufrgs.br)

xSAT is based on Glucose v3(see Glucose copyrights below) and ABC C version of
MiniSat (bsat) developed by Niklas Sorensson and modified by Alan Mishchenko.
Permissions and copyrights of xSAT are exactly the same as Glucose v3/Minisat.
(see below).

---------------

Glucose -- Copyright (c) 2013, Gilles Audemard, Laurent Simon
                               CRIL - Univ. Artois, France
                               LRI  - Univ. Paris Sud, France

Glucose sources are based on MiniSat (see below MiniSat copyrights). Permissions
and copyrights of Glucose are exactly the same as Minisat on which it is based
on. (see below).

---------------

Copyright (c) 2003-2006, Niklas Een, Niklas Sorensson
Copyright (c) 2007-2010, Niklas Sorensson

Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to use,
copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
Software, and to permit persons to whom the Software is furnished to do so,
subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*******************************************************************************/