Gurobi 5.0.1 (linux64) logging started Wed Apr 24 00:54:47 2013 Optimize a model with 11253 rows, 10923 columns and 43593 nonzeros Presolve removed 800 rows and 0 columns Presolve time: 0.06s Presolved: 10453 rows, 10923 columns, 41993 nonzeros Variable types: 10890 continuous, 33 integer (33 binary) Root relaxation: objective 3.357635e+04, 1255 iterations, 0.07 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 33576.3452 0 2 - 33576.3452 - - 0s H 0 0 34092.000000 33576.3452 1.51% - 0s 0 0 33578.5832 0 4 34092.0000 33578.5832 1.51% - 0s 0 0 33578.5832 0 4 34092.0000 33578.5832 1.51% - 0s 0 0 33578.5832 0 4 34092.0000 33578.5832 1.51% - 0s 0 2 33579.2156 0 4 34092.0000 33579.2156 1.50% - 0s H 1 1 34037.387268 33579.2156 1.35% 0.0 0s H 2 2 33690.000000 33625.4607 0.19% 10.5 0s * 4 1 4 33683.000000 33675.8182 0.02% 23.5 0s Cutting planes: Gomory: 2 Flow cover: 4 Explored 6 nodes (1392 simplex iterations) in 0.74 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.368300000000e+04, best bound 3.368300000000e+04, gap 0.0%