Gurobi 5.0.1 (linux64) logging started Sun Nov 18 04:20:45 2012 Optimize a model with 443 rows, 311 columns and 1416 nonzeros Presolve time: 0.00s Presolved: 443 rows, 311 columns, 1416 nonzeros Variable types: 0 continuous, 311 integer (311 binary) Found heuristic solution: objective 100.0000000 Root relaxation: objective 0.000000e+00, 119 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 90 100.00000 0.00000 100% - 0s H 0 0 87.0000000 0.00000 100% - 0s H 0 0 85.0000000 0.00000 100% - 0s 0 0 0.54878 0 91 85.00000 0.54878 99.4% - 0s H 0 0 81.0000000 0.54878 99.3% - 0s 0 0 1.00000 0 92 81.00000 1.00000 98.8% - 0s H 0 0 78.0000000 1.00000 98.7% - 0s 0 0 1.10037 0 93 78.00000 1.10037 98.6% - 0s H 0 0 76.0000000 1.10037 98.6% - 0s 0 0 1.11210 0 95 76.00000 1.11210 98.5% - 0s 0 0 1.17846 0 97 76.00000 1.17846 98.4% - 0s 0 0 1.22016 0 94 76.00000 1.22016 98.4% - 0s H 0 0 72.0000000 1.22016 98.3% - 0s 0 0 1.22125 0 95 72.00000 1.22125 98.3% - 0s H 0 0 67.0000000 1.22125 98.2% - 0s 0 2 1.27894 0 95 67.00000 1.27894 98.1% - 0s * 52 50 32 53.0000000 4.84790 90.9% 32.0 0s * 307 239 25 52.0000000 9.28408 82.1% 33.6 0s H 372 285 50.0000000 9.37113 81.3% 33.8 0s * 1846 524 28 49.0000000 23.69231 51.6% 29.1 2s H 2225 539 45.0000000 24.76389 45.0% 28.5 2s 3985 760 40.91892 22 147 45.00000 28.62222 36.4% 26.9 5s 9139 970 40.94737 22 147 45.00000 34.14085 24.1% 24.7 10s 15436 538 cutoff 24 45.00000 38.23684 15.0% 23.3 15s Explored 17347 nodes (395809 simplex iterations) in 16.25 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.500000000000e+01, best bound 4.500000000000e+01, gap 0.0%