Gurobi 5.0.1 (linux64) logging started Fri Nov 16 13:15:05 2012 Optimize a model with 17300 rows, 5402 columns and 56938 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.63s Presolved: 17298 rows, 5400 columns, 56464 nonzeros Variable types: 0 continuous, 5400 integer (5400 binary) Found heuristic solution: objective 73.0000000 Root relaxation: objective 2.000000e+00, 4018 iterations, 0.16 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 146 73.00000 2.00000 97.3% - 1s H 0 0 5.0000000 2.00000 60.0% - 1s 0 0 2.66667 0 528 5.00000 2.66667 46.7% - 11s 0 0 2.68599 0 4664 5.00000 2.68599 46.3% - 12s 0 0 2.68599 0 4594 5.00000 2.68599 46.3% - 15s 0 0 2.68599 0 4584 5.00000 2.68599 46.3% - 16s 0 0 2.68599 0 4576 5.00000 2.68599 46.3% - 17s 0 0 2.68599 0 4537 5.00000 2.68599 46.3% - 17s 0 0 2.68599 0 4558 5.00000 2.68599 46.3% - 18s 0 0 2.68599 0 4176 5.00000 2.68599 46.3% - 22s 0 0 2.68599 0 4103 5.00000 2.68599 46.3% - 24s H 0 0 4.0000000 2.68599 32.9% - 27s 0 0 2.68599 0 4228 4.00000 2.68599 32.9% - 30s 0 0 2.68599 0 4140 4.00000 2.68599 32.9% - 33s 0 0 2.68599 0 4064 4.00000 2.68599 32.9% - 36s 0 0 2.68599 0 4065 4.00000 2.68599 32.9% - 39s 0 0 2.68599 0 3999 4.00000 2.68599 32.9% - 42s 0 0 2.68599 0 3964 4.00000 2.68599 32.9% - 44s 0 0 2.68599 0 3994 4.00000 2.68599 32.9% - 46s 0 0 2.68599 0 3994 4.00000 2.68599 32.9% - 48s 0 1 3.00000 0 3994 4.00000 3.00000 25.0% - 70s Cutting planes: Clique: 284 Zero half: 8 Explored 6 nodes (109144 simplex iterations) in 71.43 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%