Gurobi 5.0.1 (linux64) logging started Tue Nov 20 06:47:40 2012 Optimize a model with 1055 rows, 145 columns and 2110 nonzeros Presolve removed 423 rows and 0 columns Presolve time: 0.01s Presolved: 632 rows, 145 columns, 1687 nonzeros Variable types: 0 continuous, 145 integer (145 binary) Found heuristic solution: objective 29.0000000 Root relaxation: objective 4.682086e+01, 405 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 46.82086 0 143 29.00000 46.82086 61.5% - 0s H 0 0 30.0000000 46.82086 56.1% - 0s 0 0 46.63288 0 145 30.00000 46.63288 55.4% - 0s 0 0 46.47276 0 144 30.00000 46.47276 54.9% - 0s H 0 0 31.0000000 46.47276 49.9% - 0s 0 0 46.25647 0 143 31.00000 46.25647 49.2% - 0s 0 0 46.05330 0 145 31.00000 46.05330 48.6% - 0s H 0 0 34.0000000 46.05330 35.5% - 0s 0 0 45.83950 0 144 34.00000 45.83950 34.8% - 0s 0 0 45.67587 0 143 34.00000 45.67587 34.3% - 0s 0 0 45.61786 0 145 34.00000 45.61786 34.2% - 0s 0 0 45.57600 0 145 34.00000 45.57600 34.0% - 0s 0 0 45.57419 0 144 34.00000 45.57419 34.0% - 0s 0 0 45.56957 0 145 34.00000 45.56957 34.0% - 0s 0 0 45.56957 0 145 34.00000 45.56957 34.0% - 0s 0 2 45.56748 0 145 34.00000 45.56748 34.0% - 0s H 1457 532 35.0000000 42.68295 22.0% 45.8 3s 2208 910 37.12727 23 87 35.00000 41.76511 19.3% 42.9 5s 6077 2303 38.57143 31 101 35.00000 40.05882 14.5% 35.8 10s 11048 3267 cutoff 41 35.00000 39.10714 11.7% 32.1 15s 17430 3626 36.00000 32 56 35.00000 38.36508 9.61% 29.6 20s 24215 3031 36.22222 31 80 35.00000 37.70370 7.72% 28.0 25s 31879 863 36.11111 33 76 35.00000 36.81081 5.17% 26.6 30s Explored 33261 nodes (867561 simplex iterations) in 30.60 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.500000000000e+01, best bound 3.500000000000e+01, gap 0.0%