Gurobi 5.0.1 (linux64) logging started Mon Feb 4 19:04:42 2013 Optimize a model with 59711 rows, 5041 columns and 181476 nonzeros Presolve removed 4706 rows and 2554 columns Presolve time: 0.47s Presolved: 55005 rows, 2487 columns, 167394 nonzeros Variable types: 35 continuous, 2452 integer (2452 binary) Found heuristic solution: objective 97429.000000 Root relaxation: objective 6.761915e+04, 18714 iterations, 1.71 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 67619.1538 0 16 97429.0000 67619.1538 30.6% - 2s H 0 0 67641.000000 67619.1538 0.03% - 2s H 0 0 67632.000000 67619.1538 0.02% - 2s 0 0 67619.1538 0 37 67632.0000 67619.1538 0.02% - 2s 0 0 67619.1538 0 20 67632.0000 67619.1538 0.02% - 3s H 0 0 67626.000000 67619.1538 0.01% - 3s 0 0 67620.0000 0 30 67626.0000 67620.0000 0.01% - 3s Cutting planes: Gomory: 18 Implied bound: 1 MIR: 10 Zero half: 6 Explored 0 nodes (23468 simplex iterations) in 3.36 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.762600000000e+04, best bound 6.762000000000e+04, gap 0.0089%