Gurobi 5.0.1 (linux64) logging started Fri Nov 16 14:36:53 2012 Optimize a model with 21899 rows, 5700 columns and 71023 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.74s Presolved: 21972 rows, 5698 columns, 76064 nonzeros Variable types: 0 continuous, 5698 integer (5698 binary) Found heuristic solution: objective 75.0000000 Root relaxation: objective 2.000000e+00, 4257 iterations, 0.19 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 59.0000000 2.00000 96.6% - 1s H 0 0 5.0000000 2.00000 60.0% - 1s 0 0 2.66667 0 3788 5.00000 2.66667 46.7% - 16s 0 0 2.66667 0 3788 5.00000 2.66667 46.7% - 17s 0 0 2.66667 0 218 5.00000 2.66667 46.7% - 20s 0 0 2.66972 0 4970 5.00000 2.66972 46.6% - 25s 0 0 2.66972 0 4970 5.00000 2.66972 46.6% - 26s 0 0 2.66972 0 4899 5.00000 2.66972 46.6% - 28s 0 0 2.66972 0 4966 5.00000 2.66972 46.6% - 29s 0 0 2.66972 0 4960 5.00000 2.66972 46.6% - 30s 0 0 2.66972 0 4964 5.00000 2.66972 46.6% - 32s 0 0 2.66972 0 4966 5.00000 2.66972 46.6% - 33s 0 0 2.66972 0 4965 5.00000 2.66972 46.6% - 34s 0 0 2.66972 0 4968 5.00000 2.66972 46.6% - 36s 0 0 2.66972 0 4893 5.00000 2.66972 46.6% - 36s 0 2 2.80000 0 4893 5.00000 2.80000 44.0% - 105s * 33 5 27 4.0000000 3.00000 25.0% 284 107s Cutting planes: Clique: 174 Zero half: 2 Explored 39 nodes (68341 simplex iterations) in 107.92 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%