Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:55:39 2013

Optimize a model with 680 rows, 5240 columns and 11220 nonzeros
Presolve removed 40 rows and 60 columns
Presolve time: 0.03s
Presolved: 640 rows, 5180 columns, 10360 nonzeros
Variable types: 4800 continuous, 380 integer (380 binary)

Root relaxation: objective 3.709539e+04, 477 iterations, 0.01 seconds

    Nodes    |    Current Node    |     Objective Bounds      |     Work
 Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time

     0     0 37095.3933    0    4          - 37095.3933     -      -    0s
     0     0 37113.3919    0    4          - 37113.3919     -      -    0s
     0     0 37114.5188    0    4          - 37114.5188     -      -    0s
     0     0 37114.5188    0    4          - 37114.5188     -      -    0s
     0     0 37114.5188    0    4          - 37114.5188     -      -    0s
H    0     0                    37291.650431 37114.5188  0.47%     -    0s
     0     2 37120.6577    0    4 37291.6504 37120.6577  0.46%     -    0s
*   12     4              10    37265.649519 37147.5053  0.32%  10.2    0s
*   26     7              12    37260.564732 37158.1448  0.27%   7.5    0s
H   27     6                    37258.987529 37158.1448  0.27%   7.3    0s
*   33     8               6    37257.222189 37217.6809  0.11%   9.4    0s
*   35     7               7    37257.083515 37217.6809  0.11%   9.1    0s
*   39     5               4    37253.378676 37224.0037  0.08%   9.2    0s

Cutting planes:
  Gomory: 4
  Flow cover: 6

Explored 44 nodes (1042 simplex iterations) in 0.22 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.725337867584e+04, best bound 3.725219668447e+04, gap 0.0032%