Gurobi 5.0.1 (linux64) logging started Tue Nov 20 14:37:20 2012 Optimize a model with 924 rows, 190 columns and 1848 nonzeros Presolve removed 224 rows and 3 columns Presolve time: 0.01s Presolved: 700 rows, 187 columns, 1543 nonzeros Variable types: 0 continuous, 187 integer (187 binary) Found heuristic solution: objective 52.0000000 Root relaxation: objective 7.625000e+01, 363 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 76.25000 0 145 52.00000 76.25000 46.6% - 0s H 0 0 53.0000000 76.25000 43.9% - 0s 0 0 74.77523 0 182 53.00000 74.77523 41.1% - 0s H 0 0 54.0000000 74.77523 38.5% - 0s 0 0 73.75651 0 184 54.00000 73.75651 36.6% - 0s 0 0 72.91231 0 183 54.00000 72.91231 35.0% - 0s H 0 0 56.0000000 72.91231 30.2% - 0s 0 0 72.36863 0 184 56.00000 72.36863 29.2% - 0s 0 0 72.07020 0 184 56.00000 72.07020 28.7% - 0s 0 0 71.79768 0 184 56.00000 71.79768 28.2% - 0s 0 0 71.68197 0 183 56.00000 71.68197 28.0% - 0s 0 0 71.54110 0 184 56.00000 71.54110 27.8% - 0s 0 0 71.44736 0 183 56.00000 71.44736 27.6% - 0s H 0 0 57.0000000 71.44736 25.3% - 0s 0 0 71.36476 0 185 57.00000 71.36476 25.2% - 0s 0 0 71.27412 0 186 57.00000 71.27412 25.0% - 0s 0 0 71.16227 0 185 57.00000 71.16227 24.8% - 0s 0 0 71.12108 0 186 57.00000 71.12108 24.8% - 0s 0 0 71.12108 0 186 57.00000 71.12108 24.8% - 0s H 0 0 58.0000000 71.12108 22.6% - 0s 0 2 71.11932 0 186 58.00000 71.11932 22.6% - 0s H 202 101 59.0000000 69.62726 18.0% 58.3 0s * 214 97 20 60.0000000 69.62726 16.0% 56.3 0s H 515 220 61.0000000 68.31918 12.0% 51.7 1s 615 270 63.50000 9 186 61.00000 68.23463 11.9% 50.4 5s 2142 783 63.35135 20 131 61.00000 66.77778 9.47% 47.9 10s 5053 1539 63.50000 20 135 61.00000 65.33333 7.10% 39.5 15s 8680 1748 63.83333 37 137 61.00000 64.25000 5.33% 35.6 20s 13025 1116 62.50000 31 107 61.00000 63.20833 3.62% 32.7 25s Cutting planes: Gomory: 3 Zero half: 87 Explored 15334 nodes (476210 simplex iterations) in 26.98 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.100000000000e+01, best bound 6.100000000000e+01, gap 0.0%