Gurobi 5.0.1 (linux64) logging started Fri Nov 16 11:30:06 2012 Optimize a model with 16519 rows, 4970 columns and 54178 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.57s Presolved: 16517 rows, 4968 columns, 53706 nonzeros Variable types: 0 continuous, 4968 integer (4968 binary) Found heuristic solution: objective 70.0000000 Root relaxation: objective 2.000000e+00, 3635 iterations, 0.14 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 140 70.00000 2.00000 97.1% - 1s H 0 0 67.0000000 2.00000 97.0% - 1s H 0 0 5.0000000 2.00000 60.0% - 1s 0 0 2.66667 0 185 5.00000 2.66667 46.7% - 8s 0 0 2.66995 0 4538 5.00000 2.66995 46.6% - 9s 0 0 2.66995 0 4498 5.00000 2.66995 46.6% - 11s 0 0 2.66995 0 4504 5.00000 2.66995 46.6% - 12s 0 0 2.66995 0 4133 5.00000 2.66995 46.6% - 13s 0 0 2.66995 0 4074 5.00000 2.66995 46.6% - 15s 0 0 2.66995 0 4197 5.00000 2.66995 46.6% - 16s 0 0 2.66995 0 4207 5.00000 2.66995 46.6% - 18s 0 0 2.66995 0 4212 5.00000 2.66995 46.6% - 19s 0 0 2.66995 0 4211 5.00000 2.66995 46.6% - 21s 0 0 2.66995 0 4204 5.00000 2.66995 46.6% - 22s 0 0 2.66995 0 4217 5.00000 2.66995 46.6% - 23s 0 0 2.66995 0 4217 5.00000 2.66995 46.6% - 24s 0 2 2.66995 0 4217 5.00000 2.66995 46.6% - 40s * 25 4 16 4.0000000 3.00000 25.0% 326 41s Cutting planes: Gomory: 1 Clique: 126 Zero half: 7 Explored 30 nodes (68309 simplex iterations) in 43.55 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%