Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:03 2012 Optimize a model with 418 rows, 93 columns and 836 nonzeros Presolve removed 143 rows and 0 columns Presolve time: 0.00s Presolved: 275 rows, 93 columns, 660 nonzeros Variable types: 0 continuous, 93 integer (93 binary) Found heuristic solution: objective 27.0000000 Root relaxation: objective 3.508150e+01, 179 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 35.08150 0 92 27.00000 35.08150 29.9% - 0s 0 0 34.35813 0 91 27.00000 34.35813 27.3% - 0s 0 0 34.23241 0 93 27.00000 34.23241 26.8% - 0s H 0 0 28.0000000 34.23241 22.3% - 0s 0 0 34.09363 0 93 28.00000 34.09363 21.8% - 0s 0 0 34.01357 0 92 28.00000 34.01357 21.5% - 0s H 0 0 29.0000000 34.01357 17.3% - 0s 0 0 33.84322 0 93 29.00000 33.84322 16.7% - 0s 0 0 33.72750 0 92 29.00000 33.72750 16.3% - 0s 0 0 33.65288 0 91 29.00000 33.65288 16.0% - 0s 0 0 33.63029 0 91 29.00000 33.63029 16.0% - 0s 0 0 33.59241 0 92 29.00000 33.59241 15.8% - 0s 0 0 33.54402 0 93 29.00000 33.54402 15.7% - 0s 0 0 33.49679 0 92 29.00000 33.49679 15.5% - 0s 0 0 33.40293 0 93 29.00000 33.40293 15.2% - 0s 0 0 33.34991 0 93 29.00000 33.34991 15.0% - 0s 0 0 33.31562 0 92 29.00000 33.31562 14.9% - 0s 0 0 33.26549 0 93 29.00000 33.26549 14.7% - 0s 0 0 33.22548 0 93 29.00000 33.22548 14.6% - 0s 0 0 33.21119 0 93 29.00000 33.21119 14.5% - 0s 0 0 33.21119 0 93 29.00000 33.21119 14.5% - 0s 0 2 33.21119 0 93 29.00000 33.21119 14.5% - 0s * 8 6 5 30.0000000 33.21119 10.7% 41.5 0s * 88 3 5 31.0000000 32.00000 3.23% 27.7 0s Cutting planes: Zero half: 53 Explored 92 nodes (3259 simplex iterations) in 0.18 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.100000000000e+01, best bound 3.100000000000e+01, gap 0.0%