Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:56:12 2012 Optimize a model with 738 rows, 168 columns and 1476 nonzeros Presolve removed 170 rows and 2 columns Presolve time: 0.00s Presolved: 568 rows, 166 columns, 1251 nonzeros Variable types: 0 continuous, 166 integer (166 binary) Found heuristic solution: objective 53.0000000 Root relaxation: objective 6.700000e+01, 311 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 67.00000 0 128 53.00000 67.00000 26.4% - 0s 0 0 66.50000 0 123 53.00000 66.50000 25.5% - 0s 0 0 65.81589 0 163 53.00000 65.81589 24.2% - 0s 0 0 65.33537 0 161 53.00000 65.33537 23.3% - 0s 0 0 64.55560 0 163 53.00000 64.55560 21.8% - 0s 0 0 64.17457 0 163 53.00000 64.17457 21.1% - 0s 0 0 64.01937 0 164 53.00000 64.01937 20.8% - 0s 0 0 63.94082 0 164 53.00000 63.94082 20.6% - 0s 0 0 63.76584 0 163 53.00000 63.76584 20.3% - 0s 0 0 63.70381 0 164 53.00000 63.70381 20.2% - 0s 0 0 63.58278 0 165 53.00000 63.58278 20.0% - 0s H 0 0 54.0000000 63.58278 17.7% - 0s 0 0 63.38904 0 164 54.00000 63.38904 17.4% - 0s 0 0 63.30211 0 164 54.00000 63.30211 17.2% - 0s 0 0 63.24342 0 164 54.00000 63.24342 17.1% - 0s 0 0 63.21064 0 165 54.00000 63.21064 17.1% - 0s 0 0 63.21064 0 163 54.00000 63.21064 17.1% - 0s 0 2 63.20993 0 163 54.00000 63.20993 17.1% - 0s * 126 59 14 55.0000000 62.49449 13.6% 47.0 0s * 588 210 19 56.0000000 60.44387 7.94% 45.1 1s 713 243 57.10000 13 165 56.00000 60.26415 7.61% 44.2 5s Cutting planes: Gomory: 6 Zero half: 73 Explored 2808 nodes (107259 simplex iterations) in 8.95 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.600000000000e+01, best bound 5.600000000000e+01, gap 0.0%