Gurobi 5.0.1 (linux64) logging started Tue Dec 25 15:29:59 2012 Optimize a model with 482 rows, 441 columns and 2840 nonzeros Presolve removed 44 rows and 60 columns Presolve time: 0.01s Presolved: 438 rows, 381 columns, 4140 nonzeros Variable types: 20 continuous, 361 integer (361 binary) Root relaxation: objective 2.238261e+02, 133 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 223.82607 0 45 - 223.82607 - - 0s 0 0 237.00000 0 26 - 237.00000 - - 0s 0 0 237.50000 0 35 - 237.50000 - - 0s 0 0 237.50000 0 34 - 237.50000 - - 0s 0 0 237.50000 0 34 - 237.50000 - - 0s 0 0 237.50000 0 20 - 237.50000 - - 0s 0 0 237.50000 0 20 - 237.50000 - - 0s 0 0 237.50000 0 20 - 237.50000 - - 0s 0 0 237.50000 0 20 - 237.50000 - - 0s H 0 0 328.0000000 237.50000 27.6% - 0s 0 2 237.98458 0 20 328.00000 237.98458 27.4% - 0s H 216 157 301.0000000 241.58199 19.7% 7.4 0s H 595 352 285.0000000 243.92202 14.4% 8.2 0s * 756 414 36 280.0000000 244.74175 12.6% 9.1 1s H 824 388 277.0000000 244.74175 11.6% 9.3 1s H 1424 380 274.0000000 253.50878 7.48% 10.1 1s * 2276 475 35 272.0000000 257.34669 5.39% 9.8 2s * 4087 0 51 271.0000000 271.00000 0.0% 9.7 3s Cutting planes: Gomory: 6 Cover: 4 Clique: 1 MIR: 6 GUB cover: 2 Explored 4088 nodes (40185 simplex iterations) in 3.23 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.710000000000e+02, best bound 2.710000000000e+02, gap 0.0%