Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:34:45 2013 Optimize a model with 36720 rows, 36120 columns and 144120 nonzeros Presolve removed 60 rows and 0 columns Presolve time: 0.16s Presolved: 36660 rows, 36120 columns, 144060 nonzeros Variable types: 36060 continuous, 60 integer (60 binary) Root relaxation: objective 5.545322e+04, 5651 iterations, 3.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 55453.2222 0 46 - 55453.2222 - - 3s H 0 0 85382.000000 55453.2222 35.1% - 4s 0 0 69353.5787 0 10 85382.0000 69353.5787 18.8% - 8s H 0 0 77340.330337 69353.5787 10.3% - 8s H 0 0 75425.000000 69353.5787 8.05% - 8s 0 0 71963.5811 0 9 75425.0000 71963.5811 4.59% - 9s H 0 0 75365.000000 71963.5811 4.51% - 9s 0 0 72484.8097 0 4 75365.0000 72484.8097 3.82% - 9s H 0 0 74061.899680 72484.8097 2.13% - 9s H 0 0 73653.000000 72484.8097 1.59% - 9s H 0 0 73157.000000 72484.8097 0.92% - 9s H 0 0 72699.000000 72484.8097 0.29% - 10s 0 1 72536.8769 0 3 72699.0000 72536.8769 0.22% - 10s * 3 2 3 72635.000000 72635.0000 0.0% 135 10s Cutting planes: Implied bound: 58 Explored 4 nodes (11811 simplex iterations) in 10.79 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.263500000000e+04, best bound 7.263500000000e+04, gap 0.0%