Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:39 2012 Optimize a model with 462 rows, 130 columns and 924 nonzeros Presolve removed 82 rows and 1 columns Presolve time: 0.00s Presolved: 380 rows, 129 columns, 814 nonzeros Variable types: 0 continuous, 129 integer (129 binary) Found heuristic solution: objective 40.0000000 Root relaxation: objective 5.550000e+01, 193 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 55.50000 0 109 40.00000 55.50000 38.8% - 0s H 0 0 41.0000000 55.50000 35.4% - 0s 0 0 54.75000 0 110 41.00000 54.75000 33.5% - 0s 0 0 54.16529 0 126 41.00000 54.16529 32.1% - 0s H 0 0 43.0000000 54.16529 26.0% - 0s H 0 0 45.0000000 54.16529 20.4% - 0s 0 0 53.19355 0 125 45.00000 53.19355 18.2% - 0s 0 0 53.01351 0 124 45.00000 53.01351 17.8% - 0s 0 0 52.58766 0 128 45.00000 52.58766 16.9% - 0s 0 0 52.25128 0 126 45.00000 52.25128 16.1% - 0s 0 0 52.07486 0 127 45.00000 52.07486 15.7% - 0s 0 0 52.01698 0 126 45.00000 52.01698 15.6% - 0s 0 0 51.89072 0 128 45.00000 51.89072 15.3% - 0s 0 0 51.76792 0 128 45.00000 51.76792 15.0% - 0s 0 0 51.71588 0 127 45.00000 51.71588 14.9% - 0s 0 0 51.70281 0 126 45.00000 51.70281 14.9% - 0s 0 0 51.69865 0 126 45.00000 51.69865 14.9% - 0s 0 0 51.69865 0 126 45.00000 51.69865 14.9% - 0s 0 2 51.69739 0 126 45.00000 51.69739 14.9% - 0s H 29 16 47.0000000 51.42667 9.42% 34.4 0s * 84 12 11 48.0000000 50.57390 5.36% 30.4 0s Cutting planes: Gomory: 1 Zero half: 102 Explored 154 nodes (5498 simplex iterations) in 0.25 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.800000000000e+01, best bound 4.800000000000e+01, gap 0.0%