Gurobi 5.0.1 (linux64) logging started Mon Feb 4 18:59:20 2013 Optimize a model with 39773 rows, 3844 columns and 121086 nonzeros Presolve removed 4613 rows and 1976 columns Presolve time: 0.31s Presolved: 35160 rows, 1868 columns, 106891 nonzeros Variable types: 24 continuous, 1844 integer (1844 binary) Found heuristic solution: objective 77693.000000 Root relaxation: objective 6.051460e+04, 11872 iterations, 0.96 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 60514.6044 0 10 77693.0000 60514.6044 22.1% - 1s H 0 0 60524.000000 60514.6044 0.02% - 1s 0 0 60517.1277 0 18 60524.0000 60517.1277 0.01% - 1s 0 0 60517.1277 0 8 60524.0000 60517.1277 0.01% - 1s 0 0 60517.1377 0 17 60524.0000 60517.1377 0.01% - 1s 0 0 60517.9218 0 21 60524.0000 60517.9218 0.01% - 1s 0 1 60518.4543 0 21 60524.0000 60518.4543 0.01% - 1s Cutting planes: Gomory: 1 MIR: 6 Zero half: 1 Explored 1 nodes (12015 simplex iterations) in 1.68 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.052400000000e+04, best bound 6.051900000000e+04, gap 0.0083%