Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:36:10 2013 Optimize a model with 37881 rows, 37271 columns and 148901 nonzeros Presolve removed 2588 rows and 0 columns Presolve time: 0.22s Presolved: 35293 rows, 37271 columns, 143725 nonzeros Variable types: 37210 continuous, 61 integer (61 binary) Root relaxation: objective 6.132319e+04, 6813 iterations, 1.04 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 61323.1933 0 4 - 61323.1933 - - 1s H 0 0 62001.000000 61323.1933 1.09% - 1s H 0 0 61434.000000 61323.1933 0.18% - 1s 0 0 61331.0619 0 5 61434.0000 61331.0619 0.17% - 1s 0 0 61331.0619 0 5 61434.0000 61331.0619 0.17% - 1s 0 0 61384.4091 0 1 61434.0000 61384.4091 0.08% - 2s 0 0 61384.4091 0 1 61434.0000 61384.4091 0.08% - 3s 0 0 61384.7657 0 2 61434.0000 61384.7657 0.08% - 3s 0 0 61385.3222 0 2 61434.0000 61385.3222 0.08% - 3s 0 0 61385.5496 0 2 61434.0000 61385.5496 0.08% - 3s 0 0 61386.4316 0 2 61434.0000 61386.4316 0.08% - 3s 0 0 61400.4454 0 2 61434.0000 61400.4454 0.05% - 3s 0 2 61406.0534 0 2 61434.0000 61406.0534 0.05% - 3s * 2 1 2 61425.000000 61421.0198 0.01% 22.5 3s Cutting planes: Gomory: 1 Explored 3 nodes (8768 simplex iterations) in 3.91 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.142500000000e+04, best bound 6.142101980198e+04, gap 0.0065%