Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:07:37 2013 Optimize a model with 528 rows, 23088 columns and 46128 nonzeros Presolve time: 0.03s Presolved: 528 rows, 23088 columns, 46128 nonzeros Variable types: 23040 continuous, 48 integer (48 binary) Root relaxation: objective 4.153468e+04, 680 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 41534.6806 0 4 - 41534.6806 - - 0s H 0 0 43793.000000 41534.6806 5.16% - 0s 0 0 41846.5892 0 4 43793.0000 41846.5892 4.44% - 0s 0 0 41894.9235 0 4 43793.0000 41894.9235 4.33% - 0s 0 0 41910.7132 0 3 43793.0000 41910.7132 4.30% - 0s H 0 0 43559.001082 41910.7132 3.78% - 0s H 0 0 43007.000000 41910.7132 2.55% - 0s 0 0 41919.0811 0 4 43007.0000 41919.0811 2.53% - 0s H 0 0 42861.000000 41919.0811 2.20% - 0s 0 0 41925.5221 0 4 42861.0000 41925.5221 2.18% - 0s 0 0 41925.5221 0 4 42861.0000 41925.5221 2.18% - 0s 0 0 41925.8816 0 4 42861.0000 41925.8816 2.18% - 0s 0 0 41928.2500 0 2 42861.0000 41928.2500 2.18% - 0s 0 0 41928.2500 0 2 42861.0000 41928.2500 2.18% - 0s 0 0 41928.2500 0 4 42861.0000 41928.2500 2.18% - 0s 0 0 41928.2500 0 4 42861.0000 41928.2500 2.18% - 0s 0 0 41928.2500 0 4 42861.0000 41928.2500 2.18% - 0s 0 0 41928.2500 0 3 42861.0000 41928.2500 2.18% - 0s 0 0 41928.2500 0 3 42861.0000 41928.2500 2.18% - 0s 0 0 41928.2500 0 4 42861.0000 41928.2500 2.18% - 0s 0 0 41928.2500 0 4 42861.0000 41928.2500 2.18% - 0s 0 0 41928.2500 0 2 42861.0000 41928.2500 2.18% - 0s 0 0 41928.2500 0 2 42861.0000 41928.2500 2.18% - 0s 0 0 41928.2500 0 2 42861.0000 41928.2500 2.18% - 0s 0 2 41936.1447 0 2 42861.0000 41936.1447 2.16% - 0s H 3 3 42418.000000 42010.0000 0.96% 24.7 0s H 7 5 42245.000000 42064.0000 0.43% 35.7 1s H 8 6 42170.507692 42064.0000 0.25% 31.4 1s * 11 4 8 42149.000000 42064.0000 0.20% 27.5 1s Cutting planes: Implied bound: 51 Flow cover: 1 Explored 17 nodes (2128 simplex iterations) in 1.06 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.214900000000e+04, best bound 4.214900000000e+04, gap 0.0%