Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:07:17 2013

Optimize a model with 23568 rows, 23088 columns and 92208 nonzeros
Presolve removed 208 rows and 0 columns
Presolve time: 0.13s
Presolved: 23360 rows, 23088 columns, 91792 nonzeros
Variable types: 23040 continuous, 48 integer (48 binary)

Root relaxation: objective 4.705022e+04, 3777 iterations, 0.40 seconds

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

     0     0 47050.2237    0    2          - 47050.2237     -      -    0s
H    0     0                    47587.000000 47050.2237  1.13%     -    0s
H    0     0                    47096.000000 47050.2237  0.10%     -    0s
     0     0 47050.4349    0    3 47096.0000 47050.4349  0.10%     -    0s
     0     0 47050.4349    0    2 47096.0000 47050.4349  0.10%     -    1s
     0     0 47050.4349    0    3 47096.0000 47050.4349  0.10%     -    1s
     0     0 47050.4349    0    3 47096.0000 47050.4349  0.10%     -    1s
     0     0 47093.0000    0    1 47096.0000 47093.0000  0.01%     -    1s

Cutting planes:
  Gomory: 1
  Flow cover: 2

Explored 0 nodes (4993 simplex iterations) in 1.37 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.709600000000e+04, best bound 4.709300000000e+04, gap 0.0064%