Gurobi 5.0.1 (linux64) logging started Fri Jan 18 07:44:09 2013 Optimize a model with 680 rows, 45200 columns and 528420 nonzeros Presolve removed 20 rows and 980 columns Presolve time: 1.40s Presolved: 660 rows, 44220 columns, 488420 nonzeros Variable types: 44020 continuous, 200 integer (200 binary) Root relaxation: objective 3.709539e+04, 566 iterations, 0.05 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 37095.3933 0 32 - 37095.3933 - - 1s 0 0 37095.5908 0 32 - 37095.5908 - - 2s 0 0 37095.6292 0 32 - 37095.6292 - - 2s 0 0 37095.6405 0 31 - 37095.6405 - - 2s 0 0 37095.6979 0 32 - 37095.6979 - - 2s 0 0 37095.7096 0 32 - 37095.7096 - - 3s 0 0 37095.7281 0 31 - 37095.7281 - - 3s 0 0 37095.7494 0 32 - 37095.7494 - - 3s 0 0 37095.7711 0 32 - 37095.7711 - - 4s 0 0 37095.7743 0 32 - 37095.7743 - - 4s 0 0 37095.7958 0 32 - 37095.7958 - - 4s 0 0 37095.8001 0 32 - 37095.8001 - - 5s 0 0 37095.8161 0 32 - 37095.8161 - - 5s 0 0 37095.8171 0 32 - 37095.8171 - - 5s 0 0 37095.8297 0 32 - 37095.8297 - - 6s 0 0 37095.8297 0 32 - 37095.8297 - - 6s H 0 0 37290.663244 37095.8297 0.52% - 6s H 0 0 37254.930285 37095.8297 0.43% - 7s 0 1 37233.3839 0 15 37254.9303 37233.3839 0.06% - 7s Cutting planes: Flow cover: 20 Explored 4 nodes (2764 simplex iterations) in 7.71 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.725493028483e+04, best bound 3.725126785230e+04, gap 0.0098%