public PropSubcircuit_AntiArboFiltering(IntVar[] succs, int offSet) {
super(succs, PropagatorPriority.QUADRATIC, true);
this.n = succs.length;
this.offSet = offSet;
this.connectedGraph = new DirectedGraph(n + 1, SetType.LINKED_LIST, false);
domFinder = new SimpleDominatorsFinder(n, connectedGraph);
rootCandidates = new int[n];
}