Gurobi 5.0.1 (linux64) logging started Sat Nov 17 19:54:35 2012 Optimize a model with 217 rows, 130 columns and 670 nonzeros Presolve time: 0.00s Presolved: 217 rows, 130 columns, 670 nonzeros Variable types: 0 continuous, 130 integer (130 binary) Found heuristic solution: objective 61.0000000 Found heuristic solution: objective 57.0000000 Root relaxation: objective 0.000000e+00, 41 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 22 57.00000 0.00000 100% - 0s H 0 0 53.0000000 0.00000 100% - 0s H 0 0 52.0000000 0.00000 100% - 0s 0 0 0.60000 0 24 52.00000 0.60000 98.8% - 0s 0 0 0.96111 0 40 52.00000 0.96111 98.2% - 0s 0 0 1.05000 0 24 52.00000 1.05000 98.0% - 0s 0 0 1.05000 0 24 52.00000 1.05000 98.0% - 0s 0 0 1.05000 0 24 52.00000 1.05000 98.0% - 0s 0 0 1.05000 0 24 52.00000 1.05000 98.0% - 0s H 0 0 50.0000000 1.05000 97.9% - 0s 0 2 1.27000 0 24 50.00000 1.27000 97.5% - 0s * 33 25 19 49.0000000 6.74444 86.2% 21.4 0s * 120 73 12 47.0000000 10.00000 78.7% 21.6 0s * 203 121 13 46.0000000 15.11818 67.1% 21.8 0s * 234 124 16 45.0000000 15.50000 65.6% 20.5 0s * 247 117 12 43.0000000 16.00000 62.8% 20.4 0s * 282 133 11 42.0000000 17.45455 58.4% 20.5 0s * 359 142 11 41.0000000 19.70000 52.0% 19.8 0s * 431 145 12 40.0000000 21.00000 47.5% 19.1 0s * 664 141 12 38.0000000 25.37500 33.2% 17.7 0s * 869 124 12 37.0000000 28.53846 22.9% 16.8 0s Cutting planes: Gomory: 1 Zero half: 5 Explored 1274 nodes (19556 simplex iterations) in 0.43 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.700000000000e+01, best bound 3.700000000000e+01, gap 0.0%