Gurobi 5.0.1 (linux64) logging started Fri Nov 16 19:11:15 2012 Optimize a model with 12288 rows, 16512 columns and 52864 nonzeros Presolve removed 24 rows and 3072 columns Presolve time: 0.25s Presolved: 12264 rows, 13440 columns, 49792 nonzeros Variable types: 0 continuous, 13440 integer (13440 binary) Found heuristic solution: objective 43.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: objective 2.000000e+00, 16476 iterations, 2.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 146 3.00000 2.00000 33.3% - 5s 0 0 2.00000 0 361 3.00000 2.00000 33.3% - 10s 0 0 2.00000 0 249 3.00000 2.00000 33.3% - 18s 0 0 2.00000 0 255 3.00000 2.00000 33.3% - 26s 0 0 2.00000 0 249 3.00000 2.00000 33.3% - 38s 0 0 2.00000 0 253 3.00000 2.00000 33.3% - 45s 0 0 2.00000 0 251 3.00000 2.00000 33.3% - 54s 0 0 2.00000 0 253 3.00000 2.00000 33.3% - 62s 0 0 2.00000 0 253 3.00000 2.00000 33.3% - 71s 0 0 2.00000 0 253 3.00000 2.00000 33.3% - 77s 0 2 2.00000 0 251 3.00000 2.00000 33.3% - 88s 2 3 2.00000 1 253 3.00000 2.00000 33.3% 11530 90s 4 4 2.00000 1 146 3.00000 2.00000 33.3% 5765 96s 5 5 2.00000 1 254 3.00000 2.00000 33.3% 4612 103s 6 6 2.00000 1 146 3.00000 2.00000 33.3% 3844 115s 7 6 2.00000 1 150 3.00000 2.00000 33.3% 3294 125s 8 7 2.00000 1 146 3.00000 2.00000 33.3% 2883 135s 9 8 2.00000 1 146 3.00000 2.00000 33.3% 2562 146s 10 8 2.00000 1 146 3.00000 2.00000 33.3% 2306 164s 11 9 2.00000 1 146 3.00000 2.00000 33.3% 2096 168s 13 10 infeasible 15 3.00000 2.00000 33.3% 19270 175s Cutting planes: Gomory: 16 Explored 15 nodes (522791 simplex iterations) in 177.18 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%