Gurobi 5.0.1 (linux64) logging started Wed Apr 24 04:12:44 2013 Optimize a model with 69803 rows, 68973 columns and 275643 nonzeros Presolve removed 3101 rows and 0 columns Presolve time: 0.45s Presolved: 66702 rows, 68973 columns, 269441 nonzeros Variable types: 68890 continuous, 83 integer (83 binary) Root relaxation: objective 1.089260e+05, 16138 iterations, 3.61 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 108925.963 0 3 - 108925.963 - - 4s H 0 0 110877.00000 108925.963 1.76% - 4s H 0 0 109452.00000 108925.963 0.48% - 4s 0 0 108930.816 0 5 109452.000 108930.816 0.48% - 5s 0 0 108930.816 0 5 109452.000 108930.816 0.48% - 5s 0 0 108930.816 0 3 109452.000 108930.816 0.48% - 10s 0 0 108931.935 0 5 109452.000 108931.935 0.48% - 11s 0 0 108931.935 0 5 109452.000 108931.935 0.48% - 11s 0 2 108939.873 0 5 109452.000 108939.873 0.47% - 13s * 25 1 4 109407.00000 109407.000 0.0% 156 14s Cutting planes: Gomory: 2 Flow cover: 4 Explored 26 nodes (26904 simplex iterations) in 14.84 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.094070000000e+05, best bound 1.094070000000e+05, gap 0.0%