Description:

MiniSat is a minimalistic, open-source Boolean satisfiability problem
(SAT) solver, developed for researchers and developers alike.
Winning all the industrial categories of the SAT 2005 competition,
MiniSat is a good starting point both for future research in SAT, and
for applications using SAT.

A SAT solver can determine if it is possible to find assignments to boolean
variables that would make a given expression true, if the expression is
written with only AND, OR, NOT, parentheses, and boolean variables.
If the expression is satisfiable, MiniSAT can also produce a
set of assignments that make the expression true.
Although the problem is NP-complete, SAT solvers (like this one)
are often able to decide this problem in a reasonable time frame.