Gurobi 5.0.1 (linux64) logging started Wed Apr 24 05:24:07 2013 Optimize a model with 78408 rows, 77528 columns and 309848 nonzeros Presolve removed 7071 rows and 0 columns Presolve time: 0.53s Presolved: 71337 rows, 77528 columns, 295706 nonzeros Variable types: 77440 continuous, 88 integer (88 binary) Root relaxation: objective 1.008295e+05, 13918 iterations, 3.68 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 100829.535 0 3 - 100829.535 - - 4s H 0 0 101525.00000 100829.535 0.69% - 4s H 0 0 101249.00000 100829.535 0.41% - 4s 0 0 100829.809 0 4 101249.000 100829.809 0.41% - 5s 0 0 100829.809 0 4 101249.000 100829.809 0.41% - 5s 0 0 100829.809 0 3 101249.000 100829.809 0.41% - 11s 0 0 100829.836 0 4 101249.000 100829.836 0.41% - 11s 0 0 100829.836 0 4 101249.000 100829.836 0.41% - 12s 0 2 100834.580 0 4 101249.000 100834.580 0.41% - 13s 7 9 101067.985 6 4 101249.000 100966.889 0.28% 153 15s * 10 7 9 101067.00000 100966.889 0.10% 129 15s Cutting planes: Gomory: 1 Flow cover: 4 Explored 16 nodes (23186 simplex iterations) in 15.46 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.010670000000e+05, best bound 1.010651630982e+05, gap 0.0018%