Gurobi 5.0.1 (linux64) logging started Mon Feb 4 19:04:34 2013 Optimize a model with 59711 rows, 5041 columns and 181476 nonzeros Presolve removed 4441 rows and 2555 columns Presolve time: 0.47s Presolved: 55270 rows, 2486 columns, 167778 nonzeros Variable types: 29 continuous, 2457 integer (2457 binary) Found heuristic solution: objective 102157.00000 Root relaxation: objective 7.462458e+04, 15977 iterations, 1.37 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 74624.5791 0 13 102157.000 74624.5791 27.0% - 2s H 0 0 74641.000000 74624.5791 0.02% - 2s H 0 0 74634.000000 74624.5791 0.01% - 2s 0 0 74627.2541 0 29 74634.0000 74627.2541 0.01% - 2s Cutting planes: Gomory: 10 Implied bound: 2 MIR: 8 Zero half: 1 Explored 0 nodes (16060 simplex iterations) in 2.25 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.463400000000e+04, best bound 7.462800000000e+04, gap 0.0080%