This is OOPS, a proof system for modal logics implemented in Java. It supports the logics K, KE, T, B, D, K4, K45, KD45, S4, S4E, S5, and S5E as well as ordinary propositional logic. OOPS makes use of a tableau proof method in order to prove or disprove formulas, and can generate counter models to formulas that are not provable. More information can be found on the OOPS wiki on GitHub.
OOPS was originally created by Elske van der Vaart and Gert van Valkenhoef in the context of a Multi-Agent Systems course project, and stood for "Object Oriented Prover for S5n". In 2012, Lourens Elzinga and Rik Timmers (with some help from Wouter Reckman) extended OOPS to handle various other axiom systems, thereby invalidating the name.
To encourage future work on OOPS, the source code is available under the GNU General Public License (GNU GPL). It is our hope that OOPS will be tested, proven correct, extended or otherwise enhanced in the context of future student projects.
OOPS - Object Oriented Prover for S5n Copyright (C) 2007-2009 Elske van der Vaart and Gert van Valkenhoef 2012 Gert van Valkenhoef, Wouter Reckman, Lourens Elzinga, and Rik Timmers. 2014-2015 Gert van Valkenhoef This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License version 2 as published by the Free Software Foundation. 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. See the 'LICENSE' file in the source distribution for more information.
To run OOPS from the provided ZIP file, you need Java version 1.5 or higher.
$ java -jar oops.jar
Or simply double-click on oops.jar.
Compiling from source
In order to build the sources in this directory you need:
Any additional dependencies will be downloaded automatically via Maven.
Getting the latest version from GitHub
You will need to have Git installed. Run the following command:
$ git clone https://github.com/gertvv/oops.git
Alternatively, go to https://github.com/gertvv/oops and see the downloads section, where you can retrieve source for any of the released versions of OOPS.
Building the JAR
Do the following:
$ mvn package
This will create application/target/oops-$VERSION-jar-with-dependencies.jar, which you can use to run OOPS. It will also automatically run the unit test suite.
Developing in Eclipse
Use the M2 Eclipse plugin to import OOPS as an existing maven project.