Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:10:43 2013 Optimize a model with 550 rows, 25050 columns and 50050 nonzeros Presolve time: 0.03s Presolved: 550 rows, 25050 columns, 50050 nonzeros Variable types: 25000 continuous, 50 integer (50 binary) Root relaxation: objective 4.678952e+04, 860 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 46789.5158 0 6 - 46789.5158 - - 0s H 0 0 47956.000000 46789.5158 2.43% - 0s H 0 0 47364.000000 46789.5158 1.21% - 0s 0 0 47067.2997 0 4 47364.0000 47067.2997 0.63% - 0s 0 0 47075.0516 0 3 47364.0000 47075.0516 0.61% - 0s 0 0 47075.0516 0 6 47364.0000 47075.0516 0.61% - 0s 0 0 47075.0516 0 4 47364.0000 47075.0516 0.61% - 0s 0 0 47075.0516 0 3 47364.0000 47075.0516 0.61% - 0s H 0 0 47340.000000 47075.0516 0.56% - 0s 0 0 47075.0516 0 3 47340.0000 47075.0516 0.56% - 0s 0 0 47075.2678 0 3 47340.0000 47075.2678 0.56% - 0s 0 0 47075.4543 0 2 47340.0000 47075.4543 0.56% - 0s 0 0 47075.4543 0 2 47340.0000 47075.4543 0.56% - 0s H 0 0 47107.000000 47075.4543 0.07% - 0s 0 2 47077.9292 0 1 47107.0000 47077.9292 0.06% - 0s Cutting planes: Implied bound: 57 Flow cover: 5 Explored 3 nodes (2103 simplex iterations) in 0.63 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.710700000000e+04, best bound 4.710626666667e+04, gap 0.0016%