Gurobi 5.0.1 (linux64) logging started Fri Nov 16 17:55:11 2012 Optimize a model with 6890 rows, 11342 columns and 31588 nonzeros Presolve removed 27 rows and 2862 columns Presolve time: 0.14s Presolved: 6863 rows, 8480 columns, 28726 nonzeros Variable types: 0 continuous, 8480 integer (8480 binary) Found heuristic solution: objective 34.0000000 Root relaxation: objective 2.000000e+00, 6298 iterations, 0.19 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 72 34.00000 2.00000 94.1% - 0s H 0 0 6.0000000 2.00000 66.7% - 0s H 0 0 3.0000000 2.00000 33.3% - 0s 0 0 2.00000 0 72 3.00000 2.00000 33.3% - 0s 0 0 2.00000 0 158 3.00000 2.00000 33.3% - 1s 0 0 2.00000 0 148 3.00000 2.00000 33.3% - 3s 0 0 2.00000 0 197 3.00000 2.00000 33.3% - 6s 0 0 2.00000 0 164 3.00000 2.00000 33.3% - 8s 0 0 2.00000 0 172 3.00000 2.00000 33.3% - 10s 0 0 2.00000 0 203 3.00000 2.00000 33.3% - 13s 0 0 2.00000 0 203 3.00000 2.00000 33.3% - 14s 0 2 2.00000 0 203 3.00000 2.00000 33.3% - 16s 6 6 2.00000 1 150 3.00000 2.00000 33.3% 1726 22s 7 6 2.00000 1 72 3.00000 2.00000 33.3% 1480 26s 8 7 2.00000 1 72 3.00000 2.00000 33.3% 1295 32s Cutting planes: Gomory: 9 Explored 13 nodes (233263 simplex iterations) in 34.87 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.000000000000e+00, best bound 3.000000000000e+00, gap 0.0%