Gurobi 5.0.1 (linux64) logging started Tue Nov 20 13:10:04 2012 Optimize a model with 784 rows, 173 columns and 1568 nonzeros Presolve removed 160 rows and 0 columns Presolve time: 0.00s Presolved: 624 rows, 173 columns, 1362 nonzeros Variable types: 0 continuous, 173 integer (173 binary) Found heuristic solution: objective 46.0000000 Root relaxation: objective 6.950000e+01, 318 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 69.50000 0 149 46.00000 69.50000 51.1% - 0s 0 0 68.03125 0 162 46.00000 68.03125 47.9% - 0s 0 0 67.42105 0 169 46.00000 67.42105 46.6% - 0s 0 0 66.89044 0 172 46.00000 66.89044 45.4% - 0s H 0 0 48.0000000 66.89044 39.4% - 0s 0 0 65.87246 0 172 48.00000 65.87246 37.2% - 0s H 0 0 50.0000000 65.87246 31.7% - 0s 0 0 65.41240 0 172 50.00000 65.41240 30.8% - 0s H 0 0 51.0000000 65.41240 28.3% - 0s 0 0 65.24656 0 173 51.00000 65.24656 27.9% - 0s 0 0 65.13918 0 173 51.00000 65.13918 27.7% - 0s 0 0 65.05604 0 173 51.00000 65.05604 27.6% - 0s 0 0 65.01366 0 173 51.00000 65.01366 27.5% - 0s 0 0 65.01366 0 172 51.00000 65.01366 27.5% - 0s H 0 0 52.0000000 65.01366 25.0% - 0s H 0 0 53.0000000 65.01366 22.7% - 0s H 0 0 55.0000000 65.01366 18.2% - 0s 0 2 65.01210 0 172 55.00000 65.01210 18.2% - 0s * 20 12 12 56.0000000 65.01005 16.1% 58.8 0s 610 232 58.00000 16 173 56.00000 62.03754 10.8% 48.9 5s 2050 661 57.75000 27 115 56.00000 60.93333 8.81% 46.6 10s 5130 955 57.66667 23 120 56.00000 59.07143 5.48% 37.8 15s Cutting planes: Gomory: 5 Zero half: 74 Explored 8250 nodes (276412 simplex iterations) in 18.70 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.600000000000e+01, best bound 5.600000000000e+01, gap 0.0%