The code written in this repository including the SAT solver is MIT licensed. The QBF solver links to GPLv3 licensed DepQBF and is therefore GPLv3 licensed. The interface between the solver module and the rest of the software is generic and not considered direct usage, so the rest of the software is considered to still be MIT. This has not been examined in more detail though, so no guarantee for this can be given yet. If one wants to be certain that no GPLv3 code is included, the QBF solver module must be removed.
Copyright © 2019-2020 Max Heisinger, Mathias Fleury, Armin Biere, Johannes Kepler University Linz, 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.