Gurobi 5.0.1 (linux64) logging started Wed Apr 24 04:38:26 2013 Optimize a model with 73185 rows, 72335 columns and 289085 nonzeros Presolve removed 5155 rows and 0 columns Presolve time: 0.47s Presolved: 68030 rows, 72335 columns, 278775 nonzeros Variable types: 72250 continuous, 85 integer (85 binary) Root relaxation: objective 1.088172e+05, 16395 iterations, 3.50 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 108817.230 0 4 - 108817.230 - - 4s H 0 0 109630.00000 108817.230 0.74% - 4s H 0 0 109178.00000 108817.230 0.33% - 4s 0 0 108819.558 0 4 109178.000 108819.558 0.33% - 5s 0 0 108819.558 0 4 109178.000 108819.558 0.33% - 7s 0 0 108820.134 0 4 109178.000 108820.134 0.33% - 8s 0 0 108820.134 0 4 109178.000 108820.134 0.33% - 8s 0 0 108820.134 0 4 109178.000 108820.134 0.33% - 8s 0 0 108825.460 0 4 109178.000 108825.460 0.32% - 9s 0 2 108827.249 0 4 109178.000 108827.249 0.32% - 10s * 9 6 8 109112.00000 108929.459 0.17% 112 11s * 25 5 9 109039.00000 108957.657 0.07% 70.8 11s Cutting planes: Gomory: 1 Flow cover: 1 Explored 31 nodes (24952 simplex iterations) in 12.03 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.090390000000e+05, best bound 1.090390000000e+05, gap 0.0%