Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:08:07 2013

Optimize a model with 23616 rows, 23136 columns and 92256 nonzeros
Presolve removed 48 rows and 0 columns
Presolve time: 0.10s
Presolved: 23568 rows, 23136 columns, 92208 nonzeros
Variable types: 23088 continuous, 48 integer (48 binary)

Root relaxation: objective 4.425760e+04, 3353 iterations, 1.33 seconds

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

     0     0 44257.6038    0   45          - 44257.6038     -      -    1s
H    0     0                    55519.000000 44257.6038  20.3%     -    2s
     0     0 52921.9180    0    5 55519.0000 52921.9180  4.68%     -    3s
H    0     0                    54008.000000 52921.9180  2.01%     -    3s
     0     0 52990.9554    0    4 54008.0000 52990.9554  1.88%     -    3s
H    0     0                    53965.601333 52990.9554  1.81%     -    3s
H    0     0                    53497.000000 52990.9554  0.95%     -    3s
H    0     0                    53458.000000 52990.9554  0.87%     -    3s
     0     2 53012.7660    0    4 53458.0000 53012.7660  0.83%     -    3s
H    4     4                    53145.416667 53079.2935  0.12%  77.8    4s
*    5     2               4    53086.000000 53084.3178  0.00%  69.8    4s

Cutting planes:
  Gomory: 1
  Implied bound: 44

Explored 6 nodes (5378 simplex iterations) in 4.04 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.308600000000e+04, best bound 5.308431784388e+04, gap 0.0032%