Gurobi 5.0.1 (linux64) logging started Tue Dec 25 15:24:39 2012 Optimize a model with 482 rows, 441 columns and 2811 nonzeros Presolve removed 38 rows and 76 columns Presolve time: 0.02s Presolved: 444 rows, 365 columns, 4251 nonzeros Variable types: 20 continuous, 345 integer (345 binary) Root relaxation: objective 1.468012e+02, 106 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 146.80122 0 43 - 146.80122 - - 0s 0 0 152.93684 0 28 - 152.93684 - - 0s 0 0 156.00000 0 24 - 156.00000 - - 0s 0 0 156.00000 0 24 - 156.00000 - - 0s 0 2 156.00000 0 24 - 156.00000 - - 0s * 108 72 31 260.0000000 157.21739 39.5% 8.3 0s H 299 221 257.0000000 158.51235 38.3% 8.0 0s H 326 215 238.0000000 158.73399 33.3% 8.0 0s * 362 235 31 237.0000000 158.73399 33.0% 8.0 0s H 380 193 209.0000000 158.94687 23.9% 7.9 0s H 407 164 192.0000000 158.99192 17.2% 8.0 0s H 461 182 190.0000000 159.30610 16.2% 8.0 0s H 488 176 187.0000000 159.30610 14.8% 8.2 0s H 516 149 181.0000000 159.30610 12.0% 8.0 0s H 614 177 176.0000000 168.74938 4.12% 8.0 0s Cutting planes: Learned: 2 Gomory: 3 MIR: 2 GUB cover: 1 Zero half: 2 Explored 630 nodes (6225 simplex iterations) in 0.83 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.760000000000e+02, best bound 1.760000000000e+02, gap 0.0%