Gurobi 5.0.1 (linux64) logging started Sun Nov 18 02:53:17 2012 Optimize a model with 415 rows, 273 columns and 1308 nonzeros Presolve time: 0.00s Presolved: 415 rows, 273 columns, 1308 nonzeros Variable types: 0 continuous, 273 integer (273 binary) Found heuristic solution: objective 99.0000000 Root relaxation: objective 0.000000e+00, 104 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 66 99.00000 0.00000 100% - 0s H 0 0 88.0000000 0.00000 100% - 0s H 0 0 87.0000000 0.00000 100% - 0s 0 0 0.50000 0 67 87.00000 0.50000 99.4% - 0s H 0 0 84.0000000 0.50000 99.4% - 0s 0 0 0.66279 0 69 84.00000 0.66279 99.2% - 0s 0 0 0.75758 0 68 84.00000 0.75758 99.1% - 0s 0 0 0.90909 0 68 84.00000 0.90909 98.9% - 0s 0 0 0.92424 0 68 84.00000 0.92424 98.9% - 0s 0 0 0.93434 0 71 84.00000 0.93434 98.9% - 0s 0 0 0.94118 0 69 84.00000 0.94118 98.9% - 0s 0 0 0.94776 0 70 84.00000 0.94776 98.9% - 0s H 0 0 76.0000000 0.94776 98.8% - 0s 0 2 0.96887 0 70 76.00000 0.96887 98.7% - 0s * 44 43 24 58.0000000 4.25480 92.7% 28.5 0s H 135 97 55.0000000 6.90008 87.5% 26.5 0s * 203 150 22 54.0000000 6.90008 87.2% 26.1 0s * 1042 513 30 53.0000000 15.56710 70.6% 29.1 1s * 1193 500 35 52.0000000 16.52381 68.2% 29.4 1s H 2320 637 49.0000000 25.87719 47.2% 29.0 2s H 2626 652 48.0000000 26.64706 44.5% 28.9 3s * 2834 667 30 47.0000000 28.68750 39.0% 28.9 3s * 2835 631 31 46.0000000 28.68750 37.6% 28.9 3s 4391 648 36.05357 21 125 46.00000 31.49020 31.5% 28.5 5s Explored 8297 nodes (223468 simplex iterations) in 8.46 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.600000000000e+01, best bound 4.600000000000e+01, gap 0.0%