Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:19:52 2013 Optimize a model with 30855 rows, 30305 columns and 121055 nonzeros Presolve removed 550 rows and 0 columns Presolve time: 0.17s Presolved: 30305 rows, 30305 columns, 119955 nonzeros Variable types: 30250 continuous, 55 integer (55 binary) Root relaxation: objective 5.326996e+04, 4790 iterations, 0.61 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 53269.9635 0 2 - 53269.9635 - - 0s H 0 0 53654.000000 53269.9635 0.72% - 0s H 0 0 53567.000000 53269.9635 0.55% - 1s 0 0 53272.2704 0 3 53567.0000 53272.2704 0.55% - 1s 0 0 53272.2704 0 3 53567.0000 53272.2704 0.55% - 1s 0 2 53283.3498 0 3 53567.0000 53283.3498 0.53% - 2s * 6 5 6 53533.000000 53495.6154 0.07% 88.2 2s Cutting planes: Gomory: 1 Flow cover: 3 Explored 12 nodes (5756 simplex iterations) in 2.60 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.353300000000e+04, best bound 5.353300000000e+04, gap 0.0%