Gurobi 5.0.1 (linux64) logging started Wed Apr 24 04:37:53 2013 Optimize a model with 73185 rows, 72335 columns and 289085 nonzeros Presolve removed 5738 rows and 0 columns Presolve time: 0.48s Presolved: 67447 rows, 72335 columns, 277609 nonzeros Variable types: 72250 continuous, 85 integer (85 binary) Root relaxation: objective 1.118869e+05, 15237 iterations, 3.46 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 111886.855 0 3 - 111886.855 - - 4s H 0 0 112527.00000 111886.855 0.57% - 4s 0 0 111892.265 0 4 112527.000 111892.265 0.56% - 4s 0 0 111892.265 0 4 112527.000 111892.265 0.56% - 5s 0 2 111903.613 0 4 112527.000 111903.613 0.55% - 8s 7 7 112213.953 6 1 112527.000 112075.756 0.40% 259 10s * 24 9 20 112491.00000 112075.756 0.37% 127 11s * 31 10 5 112402.00000 112141.330 0.23% 173 12s Cutting planes: Gomory: 2 Flow cover: 6 Explored 45 nodes (22938 simplex iterations) in 14.09 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.124020000000e+05, best bound 1.123962857143e+05, gap 0.0051%