1 CVC4 is copyright (C) 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 by
2 its authors and contributors (see the file AUTHORS) and their institutional
3 affiliations. All rights reserved.
5 The source code of CVC4 is open and available to students, researchers,
6 software companies, and everyone else to study, to modify, and to redistribute
7 original or modified versions; distribution is under the terms of the modified
8 BSD license (reproduced below). Please note that CVC4 can be configured
9 (however, by default it is not) to link against some GPLed libraries, and
10 therefore the use of these builds may be restricted in non-GPL-compatible
11 projects. See below for a discussion of CLN, GLPK, and Readline (the three
12 GPLed optional library dependences for CVC4), and how to ensure you have a
13 build that doesn't link against GPLed libraries.
15 Redistribution and use in source and binary forms, with or without
16 modification, are permitted provided that the following conditions are
19 1. Redistributions of source code must retain the above copyright
20 notice, this list of conditions and the following disclaimer.
22 2. Redistributions in binary form must reproduce the above copyright
23 notice, this list of conditions and the following disclaimer in the
24 documentation and/or other materials provided with the distribution.
26 3. Neither the name of the copyright holder nor the names of its
27 contributors may be used to endorse or promote products derived from
28 this software without specific prior written permission.
30 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT OWNERS AND CONTRIBUTORS
31 ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
32 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
33 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
34 OWNERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
35 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
36 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
37 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
38 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
39 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
40 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
43 -------------------------------------------------------------------------------
45 -------------------------------------------------------------------------------
47 The CVC4 source code includes third-party software which has its own copyright
48 and licensing terms, as described below.
50 Each of the following files contains third-party software.
53 config/ax_cxx_compile_stdcxx.m4
54 config/ax_cxx_compile_stdcxx_11.m4
55 config/ax_prog_doxygen.m4
60 The copyright and licensing information for each of these files is in the
61 header of the corresponding file.
63 CVC4 incorporates MiniSat code (see src/prop/minisat and src/prop/bvminisat),
64 excluded from the above copyright. See src/prop/minisat/LICENSE and
65 src/prop/bvminisat/LICENSE for copyright and licensing information.
67 CVC4 incorporates some code from Boost (see src/util/channel.h), excluded from
68 the above copyright. See licenses/channel.h-LICENSE for copyright and
69 licensing information.
71 CVC4 incorporates code from ANTLR3 (http://www.antlr3.org/), the files
72 src/parser/bounded_token_buffer.h, src/parser/bounded_token_buffer.cpp, and
73 src/parser/antlr_input_imports.cpp are excluded from the above copyright.
74 See licenses/antlr3-LICENSE for copyright and licensing information.
76 CVC4 by default links against The GNU Multiple Precision (GMP) Arithmetic
77 Library, which is licensed under GNU LGPL v3. See the file
78 licenses/lgpl-3.0.txt for a copy of that license. Note that according to the
79 terms of the LGPL, both CVC4's source, and the combined work (CVC4 linked with
80 GMP) may (and do) remain under the more permissive modified BSD license.
82 CVC4 optionally links against the following libraries:
84 ABC (https://bitbucket.org/alanmi/abc)
85 Cryptominisat4.0 (https://github.com/msoos/cryptominisat)
86 LFSC checker (https://github.com/CVC4/LFSC)
88 Linking CVC4 against these libraries does not affect the license terms of the
89 CVC4 code. See the respective projects for copyright and licensing
93 -------------------------------------------------------------------------------
94 OPTIONAL GPLv3 libraries
95 -------------------------------------------------------------------------------
97 Please be advised that the following libraries are covered under the GPLv3
98 license. If you choose to link CVC4 against one of these libraries, the
99 resulting combined work is also covered under the GPLv3. If you want to make
100 sure you build a version of CVC4 that uses no GPLed libraries, configure CVC4
101 with the "--bsd" option before building (which is the default). CVC4 can then
102 be used in contexts where you want to use CVC4 under the terms of the
103 (modified) BSD license. See licenses/gpl-3.0.txt for more information.
105 CVC4 can be optionally configured to link against CLN, the Class Library for
106 Numbers, available here:
108 http://www.ginac.de/CLN/
110 CVC4 can be optionally configured to link against glpk-cut-log, a modified
111 version of GLPK, the GNU Linear Programming Kit, available here:
113 https://github.com/timothy-king/glpk-cut-log
115 CVC4 can be optionally configured to link against GNU Readline for improved
116 text-editing support in interactive mode. GNU Readline is available here:
118 http://cnswww.cns.cwru.edu/php/chet/readline/rltop.html