Gurobi 5.0.1 (linux64) logging started Fri Nov 16 14:39:03 2012 Optimize a model with 19274 rows, 5700 columns and 63148 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.67s Presolved: 19347 rows, 5698 columns, 68259 nonzeros Variable types: 0 continuous, 5698 integer (5698 binary) Found heuristic solution: objective 75.0000000 Root relaxation: objective 2.000000e+00, 4135 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 72.0000000 2.00000 97.2% - 1s H 0 0 5.0000000 2.00000 60.0% - 1s 0 0 3.00000 0 3716 5.00000 3.00000 40.0% - 12s H 0 0 4.0000000 3.00000 25.0% - 15s 0 0 3.00000 0 3249 4.00000 3.00000 25.0% - 16s 0 0 3.00000 0 3497 4.00000 3.00000 25.0% - 24s Cutting planes: Clique: 34 Zero half: 6 Explored 0 nodes (66355 simplex iterations) in 31.96 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%