Gurobi 5.0.1 (linux64) logging started Fri Nov 16 02:26:04 2012 Optimize a model with 8287 rows, 1056 columns and 25758 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.10s Presolved: 8317 rows, 1054 columns, 30613 nonzeros Variable types: 0 continuous, 1054 integer (1054 binary) Found heuristic solution: objective 32.0000000 Root relaxation: objective 3.538462e+00, 5072 iterations, 0.31 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.53846 0 881 32.00000 3.53846 88.9% - 0s H 0 0 31.0000000 3.53846 88.6% - 1s 0 0 6.00000 0 100 31.00000 6.00000 80.6% - 1s H 0 0 26.0000000 6.00000 76.9% - 1s H 0 0 10.0000000 6.00000 40.0% - 1s H 0 0 9.0000000 6.00000 33.3% - 1s 0 0 6.28571 0 110 9.00000 6.28571 30.2% - 2s 0 0 7.00000 0 38 9.00000 7.00000 22.2% - 2s H 0 0 8.0000000 7.00000 12.5% - 2s 0 0 7.00000 0 131 8.00000 7.00000 12.5% - 2s 0 0 7.00000 0 133 8.00000 7.00000 12.5% - 2s 0 0 7.00000 0 118 8.00000 7.00000 12.5% - 2s 0 0 7.00000 0 18 8.00000 7.00000 12.5% - 2s 0 0 7.00000 0 43 8.00000 7.00000 12.5% - 3s 0 0 7.00000 0 75 8.00000 7.00000 12.5% - 3s 0 0 7.00000 0 125 8.00000 7.00000 12.5% - 3s 0 0 7.00000 0 122 8.00000 7.00000 12.5% - 3s 0 2 7.00000 0 122 8.00000 7.00000 12.5% - 3s 10 8 7.00000 0 59 8.00000 7.00000 12.5% 57.0 5s 616 20 7.00000 26 55 8.00000 7.00000 12.5% 93.2 10s Cutting planes: Gomory: 5 Clique: 61 Zero half: 46 Explored 876 nodes (98419 simplex iterations) in 11.18 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.000000000000e+00, best bound 8.000000000000e+00, gap 0.0%