Gurobi 5.0.1 (linux64) logging started Fri Jan 18 02:48:06 2013

Optimize a model with 4280 rows, 8040 columns and 24020 nonzeros
Presolve removed 60 rows and 40 columns
Presolve time: 0.17s
Presolved: 4220 rows, 8000 columns, 19960 nonzeros
Variable types: 6020 continuous, 1980 integer (1980 binary)

Root relaxation: objective 3.709539e+04, 1642 iterations, 0.03 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 37136.7558    0    2          - 37136.7558     -      -    0s
     0     0 37136.7558    0    2          - 37136.7558     -      -    0s
     0     0 37136.7558    0    2          - 37136.7558     -      -    0s
     0     2 37145.8777    0    2          - 37145.8777     -      -    0s
H  276    99                    37652.914379 37183.6061  1.25%   2.9    2s
H  306    39                    37258.562672 37188.6743  0.19%   3.2    3s
H  307    38                    37253.911136 37188.6743  0.18%   3.2    3s
H  310    35                    37253.834563 37188.6743  0.17%   3.9    3s
*  312    35              34    37253.699175 37188.6743  0.17%   4.1    3s
*  340    58              27    37253.494208 37193.6868  0.16%   4.0    3s

Cutting planes:
  Gomory: 1
  Flow cover: 5

Explored 787 nodes (6297 simplex iterations) in 4.16 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.725349420845e+04, best bound 3.724982314472e+04, gap 0.0099%