Gurobi 5.0.1 (linux64) logging started Tue Nov 20 06:24:13 2012 Optimize a model with 920 rows, 138 columns and 1840 nonzeros Presolve removed 364 rows and 0 columns Presolve time: 0.01s Presolved: 556 rows, 138 columns, 1447 nonzeros Variable types: 0 continuous, 138 integer (138 binary) Found heuristic solution: objective 31.0000000 Root relaxation: objective 4.669258e+01, 357 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 46.69258 0 138 31.00000 46.69258 50.6% - 0s 0 0 46.22119 0 136 31.00000 46.22119 49.1% - 0s H 0 0 32.0000000 46.22119 44.4% - 0s 0 0 46.05574 0 137 32.00000 46.05574 43.9% - 0s 0 0 45.71281 0 138 32.00000 45.71281 42.9% - 0s 0 0 45.48468 0 137 32.00000 45.48468 42.1% - 0s 0 0 45.23432 0 136 32.00000 45.23432 41.4% - 0s H 0 0 34.0000000 45.23432 33.0% - 0s 0 0 45.05090 0 138 34.00000 45.05090 32.5% - 0s 0 0 44.89588 0 138 34.00000 44.89588 32.0% - 0s H 0 0 35.0000000 44.89588 28.3% - 0s 0 0 44.80774 0 137 35.00000 44.80774 28.0% - 0s 0 0 44.77140 0 138 35.00000 44.77140 27.9% - 0s 0 0 44.77133 0 137 35.00000 44.77133 27.9% - 0s 0 0 44.73200 0 137 35.00000 44.73200 27.8% - 0s 0 0 44.67157 0 138 35.00000 44.67157 27.6% - 0s 0 0 44.59492 0 135 35.00000 44.59492 27.4% - 0s 0 0 44.53660 0 136 35.00000 44.53660 27.2% - 0s 0 0 44.49504 0 138 35.00000 44.49504 27.1% - 0s 0 0 44.43209 0 135 35.00000 44.43209 26.9% - 0s 0 0 44.42476 0 135 35.00000 44.42476 26.9% - 0s 0 0 44.42476 0 135 35.00000 44.42476 26.9% - 0s 0 2 44.42450 0 135 35.00000 44.42450 26.9% - 0s 616 232 41.65725 17 133 35.00000 41.65725 19.0% 40.8 5s * 1131 296 36 36.0000000 41.65252 15.7% 43.0 6s 3496 452 37.37500 38 91 36.00000 38.63018 7.31% 34.5 10s Cutting planes: Gomory: 6 Clique: 6 Zero half: 46 Mod-K: 1 Explored 4500 nodes (147083 simplex iterations) in 11.22 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.600000000000e+01, best bound 3.600000000000e+01, gap 0.0%