Gurobi 5.0.1 (linux64) logging started Sun Nov 18 04:18:04 2012 Optimize a model with 425 rows, 300 columns and 1360 nonzeros Presolve time: 0.00s Presolved: 425 rows, 300 columns, 1360 nonzeros Variable types: 0 continuous, 300 integer (300 binary) Found heuristic solution: objective 87.0000000 Root relaxation: objective 0.000000e+00, 133 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 87 87.00000 0.00000 100% - 0s H 0 0 79.0000000 0.00000 100% - 0s 0 0 0.51836 0 88 79.00000 0.51836 99.3% - 0s H 0 0 68.0000000 0.51836 99.2% - 0s 0 0 1.03756 0 91 68.00000 1.03756 98.5% - 0s 0 0 1.11648 0 91 68.00000 1.11648 98.4% - 0s H 0 0 67.0000000 1.11648 98.3% - 0s 0 0 1.12205 0 92 67.00000 1.12205 98.3% - 0s 0 2 1.13843 0 92 67.00000 1.13843 98.3% - 0s H 44 44 54.0000000 4.93728 90.9% 33.2 0s H 54 40 52.0000000 4.94698 90.5% 31.6 0s * 91 61 25 50.0000000 4.94698 90.1% 31.0 0s * 204 152 20 49.0000000 6.66463 86.4% 35.2 0s * 267 206 18 48.0000000 9.58101 80.0% 35.9 0s * 419 272 21 45.0000000 9.74481 78.3% 33.1 0s * 3645 757 30 44.0000000 27.71429 37.0% 26.0 4s 4183 820 35.23077 24 145 44.00000 28.45455 35.3% 25.5 5s * 7883 1081 30 43.0000000 31.76923 26.1% 23.9 8s 9587 1050 40.78873 27 147 43.00000 33.45455 22.2% 23.4 10s 16238 428 40.98507 27 141 43.00000 37.00000 14.0% 22.2 15s Explored 17562 nodes (385024 simplex iterations) in 15.86 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.300000000000e+01, best bound 4.300000000000e+01, gap 0.0%