How do I hold and compare values in a Boolean Satisfiability Expression?
for( int i = 0; i < 16; ++i ) // That's 2^4
{
    int x1 = i & 1;
    int x2 = i & 2;
    int x3 = i & 4;
    int x4 = i & 8;

    if( ( x1 || !x2 || !x3 ) && ( x1 || x2 || x4 ) )
        ... the expression holds for this combination, store it somewhere ...
}