Gurobi 5.0.1 (linux64) logging started Wed Apr 24 12:58:02 2013 Optimize a model with 2420 rows, 484220 columns and 968220 nonzeros Presolve time: 1.48s Presolved: 2420 rows, 484220 columns, 968220 nonzeros Variable types: 484000 continuous, 220 integer (220 binary) Root relaxation: objective 5.342390e+05, 21445 iterations, 2.76 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 534238.960 0 7 - 534238.960 - - 4s H 0 0 593996.00000 534238.960 10.1% - 6s H 0 0 537599.00000 534238.960 0.63% - 7s 0 0 534714.884 0 5 537599.000 534714.884 0.54% - 9s 0 0 534714.884 0 7 537599.000 534714.884 0.54% - 12s 0 0 534715.872 0 5 537599.000 534715.872 0.54% - 13s 0 0 534771.889 0 4 537599.000 534771.889 0.53% - 14s 0 0 534775.245 0 4 537599.000 534775.245 0.53% - 14s 0 0 534775.245 0 4 537599.000 534775.245 0.53% - 15s 0 0 534775.245 0 4 537599.000 534775.245 0.53% - 15s 0 0 534775.245 0 4 537599.000 534775.245 0.53% - 16s 0 0 534775.245 0 4 537599.000 534775.245 0.53% - 16s 0 2 534778.204 0 4 537599.000 534778.204 0.52% - 18s 4 6 534962.149 3 2 537599.000 534941.927 0.49% 156 20s H 6 6 535844.00000 534944.857 0.17% 142 20s H 12 8 535601.00000 534976.306 0.12% 117 22s 25 7 535300.841 1 7 535601.000 535162.690 0.08% 153 25s H 39 1 535594.00000 535473.143 0.02% 145 27s * 41 1 14 535512.00000 535510.000 0.00% 140 27s Cutting planes: Implied bound: 216 Flow cover: 2 Explored 42 nodes (38061 simplex iterations) in 27.60 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.355120000000e+05, best bound 5.355100000000e+05, gap 0.0004%