Gurobi 5.0.1 (linux64) logging started Fri Nov 16 14:33:53 2012 Optimize a model with 20099 rows, 5700 columns and 65623 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.70s Presolved: 20172 rows, 5698 columns, 70712 nonzeros Variable types: 0 continuous, 5698 integer (5698 binary) Found heuristic solution: objective 75.0000000 Root relaxation: objective 2.000000e+00, 4063 iterations, 0.18 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 150 75.00000 2.00000 97.3% - 1s H 0 0 73.0000000 2.00000 97.3% - 1s H 0 0 5.0000000 2.00000 60.0% - 1s 0 0 2.66667 0 562 5.00000 2.66667 46.7% - 11s 0 0 2.68545 0 5133 5.00000 2.68545 46.3% - 13s 0 0 2.68545 0 5119 5.00000 2.68545 46.3% - 16s 0 0 2.68545 0 5119 5.00000 2.68545 46.3% - 17s 0 0 2.68545 0 4761 5.00000 2.68545 46.3% - 21s 0 0 2.68545 0 4695 5.00000 2.68545 46.3% - 25s 0 0 2.68545 0 4669 5.00000 2.68545 46.3% - 27s 0 0 2.68545 0 4619 5.00000 2.68545 46.3% - 31s 0 0 2.68545 0 4641 5.00000 2.68545 46.3% - 34s 0 0 2.68545 0 4634 5.00000 2.68545 46.3% - 37s 0 0 2.68545 0 4622 5.00000 2.68545 46.3% - 39s 0 0 2.68545 0 4570 5.00000 2.68545 46.3% - 41s 0 0 2.68545 0 4592 5.00000 2.68545 46.3% - 43s H 0 0 4.0000000 2.68545 32.9% - 47s 0 0 2.68545 0 4543 4.00000 2.68545 32.9% - 50s 0 0 2.68545 0 4507 4.00000 2.68545 32.9% - 52s 0 0 2.68545 0 4555 4.00000 2.68545 32.9% - 55s 0 0 2.68545 0 4555 4.00000 2.68545 32.9% - 57s 0 1 3.00000 0 4555 4.00000 3.00000 25.0% - 61s Cutting planes: Clique: 352 Zero half: 9 Explored 4 nodes (120335 simplex iterations) in 62.43 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%