Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:51:48 2013 Optimize a model with 42965 rows, 42315 columns and 169065 nonzeros Presolve removed 2334 rows and 0 columns Presolve time: 0.26s Presolved: 40631 rows, 42315 columns, 164397 nonzeros Variable types: 42250 continuous, 65 integer (65 binary) Root relaxation: objective 6.179354e+04, 6983 iterations, 1.29 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 61793.5433 0 3 - 61793.5433 - - 1s H 0 0 62165.000000 61793.5433 0.60% - 1s H 0 0 62003.000000 61793.5433 0.34% - 1s 0 0 61798.1324 0 4 62003.0000 61798.1324 0.33% - 2s 0 0 61798.1324 0 3 62003.0000 61798.1324 0.33% - 3s 0 0 61798.1324 0 4 62003.0000 61798.1324 0.33% - 3s 0 0 61834.2019 0 4 62003.0000 61834.2019 0.27% - 3s 0 2 61836.8392 0 4 62003.0000 61836.8392 0.27% - 4s * 8 6 7 61976.000000 61861.2665 0.19% 60.4 4s Cutting planes: Gomory: 2 Flow cover: 1 Explored 16 nodes (11056 simplex iterations) in 4.66 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.197600000000e+04, best bound 6.197600000000e+04, gap 0.0%