freepoulite

I'm searching for an optimized patch for inequation system resolution like this one:

{ minDyn < |x1| + |x2| + |x3| + |x4| < maxDyn;

minDyn,maxDyn,minMove,maxMove,minStep and maxStep are integers chosen by the user

{ minDyn < |x1| +  |x2| +  |x3| +  |x4| < maxDyn;
minMove <  |x1| < maxMove;
minMove <  |x2| < maxMove;
minMove <  |x3| < maxMove;
minMove <  |x4| < maxMove;
minStep < x1 + x2 + x3 + x4 < maxStep; }

minDyn,maxDyn,minMove,maxMove,minStep and maxStep are integers chosen by the user
x1,x2,x3 and x4 are integers

inequation system solving