Gurobi 5.0.1 (linux64) logging started Fri Nov 16 20:10:20 2012 Optimize a model with 12730 rows, 18090 columns and 55744 nonzeros Presolve removed 36 rows and 4824 columns Presolve time: 0.23s Presolved: 12694 rows, 13266 columns, 50920 nonzeros Variable types: 0 continuous, 13266 integer (13266 binary) Found heuristic solution: objective 43.0000000 Root relaxation: objective 2.000000e+00, 12559 iterations, 0.84 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 142 43.00000 2.00000 95.3% - 3s H 0 0 8.0000000 2.00000 75.0% - 3s H 0 0 3.0000000 2.00000 33.3% - 3s 0 0 2.00000 0 514 3.00000 2.00000 33.3% - 9s 0 0 2.00000 0 142 3.00000 2.00000 33.3% - 17s 0 0 2.00000 0 243 3.00000 2.00000 33.3% - 26s 0 0 2.00000 0 342 3.00000 2.00000 33.3% - 36s 0 0 2.00000 0 272 3.00000 2.00000 33.3% - 46s 0 0 2.00000 0 142 3.00000 2.00000 33.3% - 58s 0 0 2.00000 0 241 3.00000 2.00000 33.3% - 67s 0 0 2.00000 0 253 3.00000 2.00000 33.3% - 75s 0 0 2.00000 0 243 3.00000 2.00000 33.3% - 81s 0 2 2.00000 0 243 3.00000 2.00000 33.3% - 93s 2 3 2.00000 1 243 3.00000 2.00000 33.3% 10344 95s 5 5 2.00000 1 342 3.00000 2.00000 33.3% 4137 114s 6 6 2.00000 1 142 3.00000 2.00000 33.3% 3448 124s 7 6 2.00000 1 142 3.00000 2.00000 33.3% 2955 137s 8 7 2.00000 1 142 3.00000 2.00000 33.3% 2586 150s 9 8 2.00000 1 142 3.00000 2.00000 33.3% 2299 169s Cutting planes: Gomory: 9 Zero half: 24 Explored 9 nodes (450973 simplex iterations) in 169.66 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%