Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:04:37 2013

Optimize a model with 21666 rows, 21206 columns and 84686 nonzeros
Presolve removed 1665 rows and 0 columns
Presolve time: 0.12s
Presolved: 20001 rows, 21206 columns, 81356 nonzeros
Variable types: 21160 continuous, 46 integer (46 binary)

Root relaxation: objective 4.672523e+04, 3163 iterations, 0.29 seconds

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

     0     0 46725.2313    0    5          - 46725.2313     -      -    0s
H    0     0                    47661.000000 46725.2313  1.96%     -    0s
     0     0 46726.1970    0    7 47661.0000 46726.1970  1.96%     -    0s
H    0     0                    47457.000000 46726.1970  1.54%     -    0s
     0     0 46726.1970    0    7 47457.0000 46726.1970  1.54%     -    0s
H    0     0                    47362.000000 46726.1970  1.34%     -    1s
     0     2 46726.7495    0    7 47362.0000 46726.7495  1.34%     -    1s
*    2     2               2    46923.000000 46849.0000  0.16%   120    1s
*    4     2               2    46853.000000 46852.0000  0.00%  85.8    1s

Cutting planes:
  Gomory: 2
  Flow cover: 3

Explored 5 nodes (3530 simplex iterations) in 1.76 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.685300000000e+04, best bound 4.685200000000e+04, gap 0.0021%