Gurobi 5.0.1 (linux64) logging started Tue Nov 20 13:09:54 2012 Optimize a model with 745 rows, 173 columns and 1490 nonzeros Presolve removed 153 rows and 2 columns Presolve time: 0.00s Presolved: 592 rows, 171 columns, 1274 nonzeros Variable types: 0 continuous, 171 integer (171 binary) Found heuristic solution: objective 53.0000000 Root relaxation: objective 6.950000e+01, 316 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 69.50000 0 129 53.00000 69.50000 31.1% - 0s 0 0 68.66667 0 158 53.00000 68.66667 29.6% - 0s 0 0 68.04688 0 166 53.00000 68.04688 28.4% - 0s H 0 0 55.0000000 68.04688 23.7% - 0s 0 0 67.62454 0 168 55.00000 67.62454 23.0% - 0s 0 0 67.08007 0 169 55.00000 67.08007 22.0% - 0s 0 0 66.59588 0 170 55.00000 66.59588 21.1% - 0s 0 0 66.42095 0 167 55.00000 66.42095 20.8% - 0s 0 0 66.18596 0 167 55.00000 66.18596 20.3% - 0s 0 0 66.01626 0 169 55.00000 66.01626 20.0% - 0s 0 0 65.88025 0 171 55.00000 65.88025 19.8% - 0s 0 0 65.84242 0 171 55.00000 65.84242 19.7% - 0s 0 0 65.72802 0 170 55.00000 65.72802 19.5% - 0s 0 0 65.64798 0 170 55.00000 65.64798 19.4% - 0s 0 0 65.45099 0 170 55.00000 65.45099 19.0% - 0s 0 0 65.40307 0 169 55.00000 65.40307 18.9% - 0s 0 0 65.35281 0 171 55.00000 65.35281 18.8% - 0s 0 0 65.32354 0 170 55.00000 65.32354 18.8% - 0s 0 0 65.31718 0 169 55.00000 65.31718 18.8% - 0s 0 0 65.31655 0 170 55.00000 65.31655 18.8% - 0s 0 0 65.31655 0 170 55.00000 65.31655 18.8% - 0s 0 2 65.30490 0 170 55.00000 65.30490 18.7% - 0s H 43 22 57.0000000 64.77397 13.6% 43.9 0s H 89 35 58.0000000 64.57120 11.3% 50.4 0s * 120 39 9 59.0000000 64.25016 8.90% 51.8 0s H 163 29 60.0000000 63.95361 6.59% 52.2 0s Cutting planes: Zero half: 193 Explored 477 nodes (28214 simplex iterations) in 1.40 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.000000000000e+01, best bound 6.000000000000e+01, gap 0.0%