Gurobi 5.0.1 (linux64) logging started Fri Nov 16 18:34:56 2012 Optimize a model with 10578 rows, 15252 columns and 46494 nonzeros Presolve removed 25 rows and 3075 columns Presolve time: 0.18s Presolved: 10553 rows, 12177 columns, 43419 nonzeros Variable types: 0 continuous, 12177 integer (12177 binary) Found heuristic solution: objective 39.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: objective 2.000000e+00, 9153 iterations, 0.35 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 76 3.00000 2.00000 33.3% - 1s 0 0 2.00000 0 185 3.00000 2.00000 33.3% - 2s 0 0 2.00000 0 237 3.00000 2.00000 33.3% - 9s 0 0 2.00000 0 76 3.00000 2.00000 33.3% - 16s 0 0 2.00000 0 180 3.00000 2.00000 33.3% - 19s 0 0 2.00000 0 172 3.00000 2.00000 33.3% - 27s 0 0 2.00000 0 196 3.00000 2.00000 33.3% - 31s 0 0 2.00000 0 237 3.00000 2.00000 33.3% - 39s 0 0 2.00000 0 237 3.00000 2.00000 33.3% - 42s 0 2 2.00000 0 237 3.00000 2.00000 33.3% - 48s 4 4 2.00000 1 76 3.00000 2.00000 33.3% 5430 50s 6 6 2.00000 1 76 3.00000 2.00000 33.3% 3620 60s 7 6 2.00000 1 76 3.00000 2.00000 33.3% 3103 66s 8 7 2.00000 1 76 3.00000 2.00000 33.3% 2715 71s 9 8 2.00000 1 76 3.00000 2.00000 33.3% 2414 78s 10 8 2.00000 1 76 3.00000 2.00000 33.3% 2172 87s Cutting planes: Gomory: 1 Zero half: 8 Explored 10 nodes (395696 simplex iterations) in 87.44 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%