This is the main source repository of the Vampire project, an advanced tool for automated reasoning. The following is for end-users of Vampire: new developers should read the wiki as well.

Please see LICENCE for usage restrictions. Note that Vampire includes some other projects with thanks:

• MiniSat, a SAT solver
• CaDiCaL, another SAT solver
• GMP, for arbitrary-precision arithmetic - specifically the mini-gmp part
• VIRAS, a quantifier elimination method
• Z3, an SMT solver (optional)

These are of course under their own license.

A statically-linked build suitable for running on StarExec is provided with each release; this may well run on your system also. If not, you will need to build Vampire from source, but this is not too onerous.

The basic usage of Vampire is to save your problem in TPTP format and run

$ vampire problem.p

which will run Vampire in its default mode with a 60 second time-limit.

However, consider running Vampire in portfolio mode:

$ vampire --mode casc problem.p

which will try lots of different strategies. This often performs better than the default mode.

If you think the problem is satisfiable then you can also run

$ vampire --mode casc_sat problem.p

which will use a set of strategies suited to satisfiable problems.

Note that all of these modes are really shortcuts for other combinations e.g. --mode casc is a shortcut for

$ vampire --mode portfolio --schedule casc --proof tptp

To see a full list of options, run

$ vampire --show_options on

Windows can be tricky. We are working on improving the situation, but in the meantime you might wish to look at the Cygwin wiki page, and related bug reports.