Gurobi 5.0.1 (linux64) logging started Fri Jan 18 07:46:06 2013 Optimize a model with 20320 rows, 44060 columns and 148100 nonzeros Presolve removed 20 rows and 20 columns Presolve time: 0.39s Presolved: 20300 rows, 44040 columns, 128080 nonzeros Variable types: 24040 continuous, 20000 integer (20000 binary) Root relaxation: objective 3.860476e+04, 572 iterations, 0.04 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 38604.7615 0 6 - 38604.7615 - - 1s 0 0 38673.2088 0 6 - 38673.2088 - - 2s 0 0 38684.9183 0 6 - 38684.9183 - - 2s 0 0 38693.9593 0 10 - 38693.9593 - - 2s 0 0 38698.0834 0 8 - 38698.0834 - - 2s 0 0 38699.1122 0 9 - 38699.1122 - - 2s 0 0 38701.1962 0 8 - 38701.1962 - - 3s 0 0 38701.8224 0 8 - 38701.8224 - - 3s 0 0 38703.0893 0 10 - 38703.0893 - - 3s 0 0 38707.1396 0 8 - 38707.1396 - - 3s 0 0 38707.3959 0 11 - 38707.3959 - - 3s 0 0 38710.3021 0 12 - 38710.3021 - - 3s 0 0 38710.4060 0 12 - 38710.4060 - - 3s 0 0 38710.4099 0 12 - 38710.4099 - - 4s 0 0 38710.4099 0 12 - 38710.4099 - - 4s 0 2 38710.4099 0 12 - 38710.4099 - - 7s * 27 7 14 38861.054473 38841.4261 0.05% 27.2 7s Cutting planes: Gomory: 1 Implied bound: 50 Flow cover: 4 Explored 33 nodes (1693 simplex iterations) in 7.94 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.886105447350e+04, best bound 3.885731680993e+04, gap 0.0096%