Gurobi 5.0.1 (linux64) logging started Fri Nov 16 19:57:08 2012 Optimize a model with 12408 rows, 17556 columns and 54252 nonzeros Presolve removed 31 rows and 4092 columns Presolve time: 0.21s Presolved: 12377 rows, 13464 columns, 50160 nonzeros Variable types: 0 continuous, 13464 integer (13464 binary) Found heuristic solution: objective 43.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: objective 2.000000e+00, 19497 iterations, 3.59 seconds Total elapsed time = 7.35s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 156 3.00000 2.00000 33.3% - 7s 0 0 2.00000 0 283 3.00000 2.00000 33.3% - 11s 0 0 2.00000 0 258 3.00000 2.00000 33.3% - 20s 0 0 2.00000 0 286 3.00000 2.00000 33.3% - 27s 0 0 2.00000 0 156 3.00000 2.00000 33.3% - 30s 0 0 2.00000 0 258 3.00000 2.00000 33.3% - 37s 0 0 2.00000 0 156 3.00000 2.00000 33.3% - 47s 0 0 2.00000 0 258 3.00000 2.00000 33.3% - 58s 0 0 2.00000 0 283 3.00000 2.00000 33.3% - 65s 0 0 2.00000 0 283 3.00000 2.00000 33.3% - 71s 0 2 2.00000 0 283 3.00000 2.00000 33.3% - 80s 4 4 2.00000 1 156 3.00000 2.00000 33.3% 6522 94s 5 5 2.00000 1 365 3.00000 2.00000 33.3% 5218 107s 6 6 2.00000 1 156 3.00000 2.00000 33.3% 4348 118s 7 6 2.00000 1 156 3.00000 2.00000 33.3% 3727 132s 8 7 2.00000 1 156 3.00000 2.00000 33.3% 3261 144s 9 8 2.00000 1 156 3.00000 2.00000 33.3% 2899 163s Cutting planes: Gomory: 24 Explored 9 nodes (473723 simplex iterations) in 164.13 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%