Gurobi 5.0.1 (linux64) logging started Tue Nov 20 06:38:48 2012 Optimize a model with 1001 rows, 143 columns and 2002 nonzeros Presolve removed 395 rows and 0 columns Presolve time: 0.01s Presolved: 606 rows, 143 columns, 1579 nonzeros Variable types: 0 continuous, 143 integer (143 binary) Found heuristic solution: objective 31.0000000 Root relaxation: objective 4.601285e+01, 381 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 46.01285 0 141 31.00000 46.01285 48.4% - 0s 0 0 45.51393 0 141 31.00000 45.51393 46.8% - 0s 0 0 45.05319 0 140 31.00000 45.05319 45.3% - 0s 0 0 44.96079 0 142 31.00000 44.96079 45.0% - 0s 0 0 44.94024 0 141 31.00000 44.94024 45.0% - 0s 0 0 44.85884 0 143 31.00000 44.85884 44.7% - 0s 0 0 44.80673 0 143 31.00000 44.80673 44.5% - 0s 0 0 44.73323 0 140 31.00000 44.73323 44.3% - 0s 0 0 44.73323 0 141 31.00000 44.73323 44.3% - 0s 0 0 44.72664 0 141 31.00000 44.72664 44.3% - 0s 0 0 44.72664 0 141 31.00000 44.72664 44.3% - 0s 0 2 44.72660 0 141 31.00000 44.72660 44.3% - 0s * 44 36 15 32.0000000 44.58150 39.3% 54.5 0s H 437 179 34.0000000 42.55600 25.2% 36.3 0s 613 264 36.10000 25 140 34.00000 42.18293 24.1% 35.2 5s 626 273 35.66667 19 141 34.00000 42.18293 24.1% 34.5 10s 2619 1050 36.00000 33 74 34.00000 39.93718 17.5% 37.4 15s 6077 2174 36.50000 20 71 34.00000 38.48077 13.2% 31.4 20s * 6267 1740 28 35.0000000 38.43836 9.82% 31.2 20s 9822 1012 36.73214 34 84 35.00000 36.91724 5.48% 28.9 25s Cutting planes: Gomory: 1 Clique: 6 Zero half: 101 Explored 11117 nodes (303926 simplex iterations) in 25.77 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%