Gurobi 5.0.1 (linux64) logging started Sun Nov 18 01:16:31 2012 Optimize a model with 337 rows, 227 columns and 1067 nonzeros Presolve time: 0.00s Presolved: 337 rows, 227 columns, 1067 nonzeros Variable types: 0 continuous, 227 integer (227 binary) Found heuristic solution: objective 79.0000000 Found heuristic solution: objective 72.0000000 Root relaxation: objective 0.000000e+00, 96 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 59 72.00000 0.00000 100% - 0s H 0 0 70.0000000 0.00000 100% - 0s H 0 0 63.0000000 0.00000 100% - 0s 0 0 0.61604 0 61 63.00000 0.61604 99.0% - 0s H 0 0 61.0000000 0.61604 99.0% - 0s 0 0 0.66493 0 61 61.00000 0.66493 98.9% - 0s 0 0 0.73342 0 63 61.00000 0.73342 98.8% - 0s 0 0 0.74753 0 66 61.00000 0.74753 98.8% - 0s 0 0 0.75280 0 69 61.00000 0.75280 98.8% - 0s 0 2 0.75897 0 69 61.00000 0.75897 98.8% - 0s * 50 49 29 53.0000000 5.01234 90.5% 23.7 0s * 91 79 28 51.0000000 5.19849 89.8% 23.0 0s * 134 104 23 50.0000000 8.33077 83.3% 23.1 0s * 191 143 20 48.0000000 8.57517 82.1% 23.8 0s * 277 155 17 40.0000000 10.00481 75.0% 24.1 0s 7215 150 36.71429 20 98 40.00000 33.86957 15.3% 19.6 5s Explored 7714 nodes (150328 simplex iterations) in 5.26 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+01, best bound 4.000000000000e+01, gap 0.0%