Gurobi 5.0.1 (linux64) logging started Tue Dec 25 15:24:57 2012 Optimize a model with 442 rows, 441 columns and 1981 nonzeros Presolve removed 159 rows and 90 columns Presolve time: 0.01s Presolved: 283 rows, 351 columns, 3231 nonzeros Variable types: 20 continuous, 331 integer (331 binary) Root relaxation: objective 2.079812e+02, 97 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 207.98121 0 33 - 207.98121 - - 0s 0 0 226.11205 0 33 - 226.11205 - - 0s 0 0 227.18784 0 35 - 227.18784 - - 0s 0 0 227.19859 0 35 - 227.19859 - - 0s 0 0 227.30077 0 30 - 227.30077 - - 0s 0 0 227.34625 0 35 - 227.34625 - - 0s 0 0 227.34625 0 35 - 227.34625 - - 0s 0 0 227.34625 0 35 - 227.34625 - - 0s H 0 0 317.0000000 227.34625 28.3% - 0s H 0 0 315.0000000 227.34625 27.8% - 0s 0 2 227.36111 0 31 315.00000 227.36111 27.8% - 0s H 193 133 310.0000000 236.58798 23.7% 9.8 0s H 247 156 307.0000000 238.59350 22.3% 9.8 0s H 274 161 297.0000000 239.66896 19.3% 9.8 0s * 424 226 22 294.0000000 242.35870 17.6% 9.5 0s * 425 218 21 292.0000000 242.35870 17.0% 9.5 0s H 600 316 290.0000000 243.81776 15.9% 9.1 0s * 1875 683 50 288.0000000 246.24845 14.5% 11.0 1s * 2092 607 25 272.0000000 247.73226 8.92% 11.0 1s Cutting planes: Gomory: 5 Cover: 1 Implied bound: 2 Clique: 4 MIR: 7 GUB cover: 2 Explored 4585 nodes (47152 simplex iterations) in 2.68 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.720000000000e+02, best bound 2.720000000000e+02, gap 0.0%