path: root/COPYING

CVC4 is copyright (C) 2009, 2010, 2011, 2012 the ACSys research group at
the Courant Institute for Mathematical Sciences, New York University.
All rights reserved.

CVC4 is open-source; distribution is under the terms of the modified BSD
license.  However, certain builds of CVC4 link against GPLed libraries,
and therefore the use of these builds is restricted in non-open-source
projects.  See below for a discussion of CLN and how to ensure you have
a build that doesn't link against GPLed libraries.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT OWNERS AND CONTRIBUTORS
''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

-- Morgan Deters <mdeters@cs.nyu.edu>  Fri, 04 Feb 2011 14:56:41 -0500

CVC4 incorporates MiniSat code, excluded from the above copyright.
See src/sat/minisat.  Its copyright:

  MiniSat -- 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.

CVC4 incorporates the script "autogen.sh", excluded from the above copyright.
See autogen.sh.  Its copyright:

  Copyright (c) 2005-2009 United States Government as represented by
  the U.S. Army Research Laboratory.

  Redistribution and use in source and binary forms, with or without
  modification, are permitted provided that the following conditions
  are met:

  1. Redistributions of source code must retain the above copyright
  notice, this list of conditions and the following disclaimer.

  2. Redistributions in binary form must reproduce the above
  copyright notice, this list of conditions and the following
  disclaimer in the documentation and/or other materials provided
  with the distribution.

  3. The name of the author may not be used to endorse or promote
  products derived from this software without specific prior written
  permission.

  THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
  OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
  GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

CVC4 incorporates the script "doxygen.am", excluded from the above copyright.
See config/doxygen.am.  Its copyright:

  Copyright (C) 2004 Oren Ben-Kiki
  This file is distributed under the same terms as the Automake macro files.

CVC4 incorporates the m4 macro file "pkg.m4", excluded from the above
copyright.  See config/pkg.m4.  Its copyright:

  Copyright (c) 2004 Scott James Remnant <scott@netsplit.com>.

  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2 of the License, or
  (at your option) any later version.

  This program is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

  As a special exception to the GNU General Public License, if you
  distribute this file as part of a program that contains a
  configuration script generated by Autoconf, you may include it under
  the same distribution terms that you use for the rest of that program.

CVC4 incorporates the m4 macro file "ax_tls.m4", excluded from the above
copyright and downloaded from
http://www.gnu.org/software/autoconf-archive/ax_tls.html.
See config/ax_tls.m4.  Its copyright:

  Copyright (c) 2008 Alan Woodland <ajw05@aber.ac.uk>
  Copyright (c) 2010 Diego Elio Pettenò <flameeyes@gmail.com>

  This program is free software: you can redistribute it and/or modify it
  under the terms of the GNU General Public License as published by the
  Free Software Foundation, either version 3 of the License, or (at your
  option) any later version.

  This program is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
  Public License for more details.

  You should have received a copy of the GNU General Public License along
  with this program. If not, see <http://www.gnu.org/licenses/>.

  As a special exception, the respective Autoconf Macro's copyright owner
  gives unlimited permission to copy, distribute and modify the configure
  scripts that are the output of Autoconf when processing the Macro. You
  need not follow the terms of the GNU General Public License when using
  or distributing such scripts, even though portions of the text of the
  Macro appear in them. The GNU General Public License (GPL) does govern
  all other use of the material that constitutes the Autoconf Macro.

  This special exception to the GPL applies to versions of the Autoconf
  Macro released by the Autoconf Archive. When you make and distribute a
  modified version of the Autoconf Macro, you may extend this special
  exception to the GPL to apply to your modified version as well.

CVC4 incorporates code from ANTLR3, excluded from the above copyright.
See http://www.antlr.org/, and the files src/parser/bounded_token_buffer.h,
src/parser/bounded_token_buffer.cpp, and src/parser/antlr_input_imports.cpp.
Their copyright:

  [The "BSD licence"]
  Copyright (c) 2005-2009 Jim Idle, Temporal Wave LLC
  http://www.temporal-wave.com
  http://www.linkedin.com/in/jimidle

  All rights reserved.

  Redistribution and use in source and binary forms, with or without
  modification, are permitted provided that the following conditions
  are met:
  1. Redistributions of source code must retain the above copyright
     notice, this list of conditions and the following disclaimer.
  2. Redistributions in binary form must reproduce the above copyright
     notice, this list of conditions and the following disclaimer in the
     documentation and/or other materials provided with the distribution.
  3. The name of the author may not be used to endorse or promote products
     derived from this software without specific prior written permission.

  THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Certain builds of CVC4 link against a GPLed library, CLN, the Class Library
for Numbers, available here:

  http://www.ginac.de/CLN/

Please be advised that as this class library is covered under the GPL, the
combined work, CVC4+CLN, is also covered under the GPL and cannot be used
by proprietary software projects.  For the full text of the GPL, please
consult the CLN website.  CVC4 does not require CLN; it can be built against
libgmp, the GNU Multiple Precision Arithmetic Library, which is covered by
the more permissive LGPL.  To ensure that CLN is not used in the build,
configure CVC4 with "--without-cln".