Gurobi 5.0.1 (linux64) logging started Tue Nov 20 13:03:50 2012 Optimize a model with 731 rows, 171 columns and 1462 nonzeros Presolve removed 143 rows and 0 columns Presolve time: 0.00s Presolved: 588 rows, 171 columns, 1267 nonzeros Variable types: 0 continuous, 171 integer (171 binary) Found heuristic solution: objective 49.0000000 Root relaxation: objective 7.116667e+01, 302 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 71.16667 0 153 49.00000 71.16667 45.2% - 0s 0 0 70.11111 0 162 49.00000 70.11111 43.1% - 0s H 0 0 51.0000000 70.11111 37.5% - 0s H 0 0 54.0000000 70.11111 29.8% - 0s 0 0 69.07024 0 169 54.00000 69.07024 27.9% - 0s 0 0 68.11537 0 166 54.00000 68.11537 26.1% - 0s 0 0 67.35651 0 169 54.00000 67.35651 24.7% - 0s 0 0 67.03619 0 169 54.00000 67.03619 24.1% - 0s 0 0 66.79447 0 169 54.00000 66.79447 23.7% - 0s H 0 0 55.0000000 66.79447 21.4% - 0s 0 0 66.32057 0 169 55.00000 66.32057 20.6% - 0s 0 0 66.13982 0 170 55.00000 66.13982 20.3% - 0s 0 0 65.93611 0 170 55.00000 65.93611 19.9% - 0s 0 0 65.78567 0 171 55.00000 65.78567 19.6% - 0s 0 0 65.62192 0 171 55.00000 65.62192 19.3% - 0s 0 0 65.49101 0 170 55.00000 65.49101 19.1% - 0s 0 0 65.40589 0 170 55.00000 65.40589 18.9% - 0s 0 0 65.35515 0 171 55.00000 65.35515 18.8% - 0s 0 0 65.35515 0 171 55.00000 65.35515 18.8% - 0s 0 2 65.35389 0 171 55.00000 65.35389 18.8% - 0s H 17 17 57.0000000 65.34781 14.6% 76.3 0s 611 246 61.04639 9 171 57.00000 62.70513 10.0% 48.8 5s 2234 668 61.00000 22 121 57.00000 61.55108 7.98% 41.8 10s 5978 868 58.11111 35 120 57.00000 59.75000 4.82% 32.3 15s * 6719 394 33 58.0000000 59.46154 2.52% 31.5 15s Cutting planes: Gomory: 4 Zero half: 81 Explored 7134 nodes (217763 simplex iterations) in 15.84 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.800000000000e+01, best bound 5.800000000000e+01, gap 0.0%