This function creates and returns a node evaluator that implements a best first search in a Concert Technology model.

Nodes are evaluated according to the variable var. As long as the minimum of var is no greater than the minimum of the evaluation of each open nodes + step, the search continues as a depth-first search. If the opposite is true, the goal manager postpones the evaluation of the current node and jumps to the best open node.

This function returns an instance of IloNodeEvaluator for use with the member functions IloSolver::startNewSearch and IloSolver::solve. An instance of IloSolver extracts the node evaluator that it returns as an instance of IlcNodeEvaluator for use during a Solver search.

For more information, see IloNullIntersect.