Gurobi 5.0.1 (linux64) logging started Fri Nov 16 14:32:10 2012 Optimize a model with 21524 rows, 5700 columns and 69898 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.74s Presolved: 21597 rows, 5698 columns, 74949 nonzeros Variable types: 0 continuous, 5698 integer (5698 binary) Found heuristic solution: objective 75.0000000 Root relaxation: objective 2.000000e+00, 4350 iterations, 0.21 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 69.0000000 2.00000 97.1% - 1s H 0 0 5.0000000 2.00000 60.0% - 1s 0 0 3.00000 0 974 5.00000 3.00000 40.0% - 23s 0 0 3.03546 0 3991 5.00000 3.03546 39.3% - 28s H 0 0 4.0000000 3.03546 24.1% - 32s Cutting planes: Clique: 53 Zero half: 5 Explored 0 nodes (68350 simplex iterations) in 32.02 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%