Gurobi 5.0.1 (linux64) logging started Fri Nov 16 02:34:41 2012 Optimize a model with 8546 rows, 1122 columns and 26596 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.10s Presolved: 8577 rows, 1120 columns, 30275 nonzeros Variable types: 0 continuous, 1120 integer (1120 binary) Found heuristic solution: objective 33.0000000 Root relaxation: objective 3.417143e+00, 7500 iterations, 0.58 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.41714 0 992 33.00000 3.41714 89.6% - 1s 0 0 6.00000 0 113 33.00000 6.00000 81.8% - 2s H 0 0 17.0000000 6.00000 64.7% - 2s H 0 0 8.0000000 6.00000 25.0% - 2s 0 0 6.00000 0 80 8.00000 6.00000 25.0% - 2s 0 0 6.00000 0 121 8.00000 6.00000 25.0% - 3s 0 0 6.00000 0 147 8.00000 6.00000 25.0% - 3s 0 0 6.00000 0 135 8.00000 6.00000 25.0% - 3s 0 0 6.00000 0 152 8.00000 6.00000 25.0% - 3s 0 0 6.00000 0 127 8.00000 6.00000 25.0% - 3s 0 0 6.00000 0 128 8.00000 6.00000 25.0% - 3s 0 0 6.00000 0 132 8.00000 6.00000 25.0% - 4s 0 0 6.00000 0 132 8.00000 6.00000 25.0% - 4s 0 2 6.00000 0 132 8.00000 6.00000 25.0% - 4s 96 59 7.00000 17 59 8.00000 6.00000 25.0% 106 5s * 136 1 14 7.0000000 6.00000 14.3% 108 5s Cutting planes: Gomory: 7 Clique: 43 Zero half: 57 Explored 159 nodes (55156 simplex iterations) in 9.31 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.000000000000e+00, best bound 7.000000000000e+00, gap 0.0%