Gurobi 5.0.1 (linux64) logging started Tue Nov 20 13:41:42 2012 Optimize a model with 860 rows, 182 columns and 1720 nonzeros Presolve removed 191 rows and 0 columns Presolve time: 0.01s Presolved: 669 rows, 182 columns, 1468 nonzeros Variable types: 0 continuous, 182 integer (182 binary) Found heuristic solution: objective 47.0000000 Root relaxation: objective 7.250000e+01, 348 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 72.50000 0 145 47.00000 72.50000 54.3% - 0s 0 0 71.31250 0 172 47.00000 71.31250 51.7% - 0s 0 0 70.57545 0 179 47.00000 70.57545 50.2% - 0s 0 0 69.73014 0 181 47.00000 69.73014 48.4% - 0s 0 0 68.95291 0 181 47.00000 68.95291 46.7% - 0s 0 0 68.48540 0 180 47.00000 68.48540 45.7% - 0s H 0 0 52.0000000 68.48540 31.7% - 0s 0 0 68.03541 0 179 52.00000 68.03541 30.8% - 0s 0 0 67.83083 0 181 52.00000 67.83083 30.4% - 0s 0 0 67.63138 0 182 52.00000 67.63138 30.1% - 0s 0 0 67.50677 0 181 52.00000 67.50677 29.8% - 0s 0 0 67.44006 0 181 52.00000 67.44006 29.7% - 0s 0 0 67.36118 0 180 52.00000 67.36118 29.5% - 0s 0 0 67.31392 0 181 52.00000 67.31392 29.4% - 0s H 0 0 53.0000000 67.31392 27.0% - 0s 0 0 67.28919 0 180 53.00000 67.28919 27.0% - 0s 0 0 67.23443 0 182 53.00000 67.23443 26.9% - 0s 0 0 67.20238 0 182 53.00000 67.20238 26.8% - 0s 0 0 67.20238 0 182 53.00000 67.20238 26.8% - 0s 0 2 67.20152 0 182 53.00000 67.20152 26.8% - 0s * 142 79 24 55.0000000 66.36138 20.7% 50.5 0s * 304 112 15 57.0000000 65.77576 15.4% 49.9 0s 609 224 62.16901 10 182 57.00000 64.93762 13.9% 52.2 5s 2101 840 58.62500 40 115 57.00000 63.45833 11.3% 48.0 10s 5115 1980 59.80000 26 129 57.00000 62.21429 9.15% 38.1 15s 8730 2844 58.78571 32 125 57.00000 61.35000 7.63% 34.2 20s 12872 3366 cutoff 39 57.00000 60.67857 6.45% 31.7 25s 18712 3296 cutoff 30 57.00000 60.00000 5.26% 29.6 30s 25038 2072 58.00000 34 102 57.00000 59.14286 3.76% 28.1 35s Cutting planes: Gomory: 5 Zero half: 86 Explored 29403 nodes (786862 simplex iterations) in 38.26 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.700000000000e+01, best bound 5.700000000000e+01, gap 0.0%