Gurobi 5.0.1 (linux64) logging started Fri Nov 16 19:44:20 2012 Optimize a model with 12183 rows, 17292 columns and 53317 nonzeros Presolve removed 37 rows and 4847 columns Presolve time: 0.21s Presolved: 12146 rows, 12445 columns, 48470 nonzeros Variable types: 0 continuous, 12445 integer (12445 binary) Found heuristic solution: objective 41.0000000 Root relaxation: objective 2.000000e+00, 11450 iterations, 0.65 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 144 41.00000 2.00000 95.1% - 3s H 0 0 5.0000000 2.00000 60.0% - 3s H 0 0 3.0000000 2.00000 33.3% - 3s 0 0 2.00000 0 250 3.00000 2.00000 33.3% - 7s 0 0 2.00000 0 240 3.00000 2.00000 33.3% - 15s 0 0 2.00000 0 263 3.00000 2.00000 33.3% - 24s 0 0 2.00000 0 144 3.00000 2.00000 33.3% - 32s 0 0 2.00000 0 242 3.00000 2.00000 33.3% - 39s 0 0 2.00000 0 265 3.00000 2.00000 33.3% - 49s 0 0 2.00000 0 144 3.00000 2.00000 33.3% - 66s 0 0 2.00000 0 238 3.00000 2.00000 33.3% - 76s 0 0 2.00000 0 238 3.00000 2.00000 33.3% - 82s 0 2 2.00000 0 238 3.00000 2.00000 33.3% - 95s 4 4 2.00000 1 144 3.00000 2.00000 33.3% 5238 102s 5 5 2.00000 1 238 3.00000 2.00000 33.3% 4191 113s 6 6 2.00000 1 144 3.00000 2.00000 33.3% 3492 129s 7 6 2.00000 1 144 3.00000 2.00000 33.3% 2993 139s 8 7 2.00000 1 144 3.00000 2.00000 33.3% 2619 156s Cutting planes: Gomory: 16 Zero half: 4 Explored 8 nodes (439095 simplex iterations) in 157.14 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%