This file describes the license and copyright for the AIGER source code.

Almost all of the source code of AIGER has so far been developed from
scratch at the Johannes Kepler University.  But contributions by authors of
other institutions are very much welcome.  The default license is an MIT
style license, acknowledging the copyright of all its authors, and we would
like to keep this license the default.  Currently the only exception is
'bliftoaig.c' which contains parts of the CUDD library.  Therefore 
license of 'bliftoaig.c' has to fall back to the slightly more restrictive
BSD style license used in CUDD and discussed further down.

More specifically, all source code of the AIGER library with the exception
of the 'bliftoaig.c' utility falls under the following LICENSE.   

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Copyright (c) 2021-2024, Armin Biere, Johannes Kepler University, Austria.
Copyright (c) 2006-2021, Armin Biere, Johannes Kepler University, Austria.
Copyright (c) 2006, Marc Herbstritt, University of Freiburg, Germany.
Copyright (c) 2006, Daniel Le Berre, Universite d'Artois, France.
Copyright (c) 2011, Siert Wieringa, Alto University, Finland.
Copyright (c) 2015, Aina Niemetz, Johannes Kepler University, Austria.

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.
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The list of authors and copyright holders listed in the default license
contains all the authors and copyright holders of AIGER, individual source
code files may only list the authors and copyright holders of the individual
file.   The LICENSE is the same and thus should allow to cover all the
source except 'bliftoaig.c' by the above default license which lists all
authors.

The License for 'bliftoaig.c' is a BSD style license since it includes
part of utilities derived from the CUDD library which uses a BSD style
license.  The full license for 'bliftoaig.c' is as follows:

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Copyright (c) 2006 Armin Biere, Johannes Kepler University, Austria.
Copyright (c) 2006 Marc Herbstritt, University of Freiburg, Germany.
Copyright (c) 1995-2004, Regents of the University of Colorado, USA.

All rights reserved.

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

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

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.

Neither the name of the authors, nor the names of contributors, nor the name
of the copyright holders, including the name of the Johannes Kepler
University, the name of the University of Freiburg, or the name of the
University of Colorado may be used to endorse or promote products derived
from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 OWNER 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.
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