Gurobi 5.0.1 (linux64) logging started Fri Nov 16 09:34:08 2012 Optimize a model with 13859 rows, 4422 columns and 45670 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.42s Presolved: 13857 rows, 4420 columns, 45250 nonzeros Variable types: 0 continuous, 4420 integer (4420 binary) Found heuristic solution: objective 66.0000000 Root relaxation: objective 2.000000e+00, 3147 iterations, 0.10 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 132 66.00000 2.00000 97.0% - 0s H 0 0 57.0000000 2.00000 96.5% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 424 5.00000 2.66667 46.7% - 2s H 0 0 4.0000000 2.66667 33.3% - 3s 0 0 2.68449 0 3879 4.00000 2.68449 32.9% - 3s 0 0 2.68449 0 3831 4.00000 2.68449 32.9% - 6s 0 0 2.68449 0 3803 4.00000 2.68449 32.9% - 6s 0 0 2.68449 0 3823 4.00000 2.68449 32.9% - 6s 0 0 2.68449 0 3576 4.00000 2.68449 32.9% - 8s 0 0 2.68449 0 3548 4.00000 2.68449 32.9% - 10s 0 0 2.68449 0 3510 4.00000 2.68449 32.9% - 12s 0 0 2.68449 0 3501 4.00000 2.68449 32.9% - 13s 0 0 2.68449 0 3445 4.00000 2.68449 32.9% - 15s 0 0 2.68449 0 3516 4.00000 2.68449 32.9% - 16s 0 0 2.68449 0 3551 4.00000 2.68449 32.9% - 18s 0 0 2.68449 0 3561 4.00000 2.68449 32.9% - 20s 0 0 2.68449 0 3561 4.00000 2.68449 32.9% - 20s 0 1 3.00000 0 3561 4.00000 3.00000 25.0% - 28s Cutting planes: Clique: 201 Zero half: 3 Explored 8 nodes (51687 simplex iterations) in 28.50 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%