Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:07:20 2013

Optimize a model with 23568 rows, 23088 columns and 92208 nonzeros
Presolve removed 2190 rows and 0 columns
Presolve time: 0.13s
Presolved: 21378 rows, 23088 columns, 87828 nonzeros
Variable types: 23040 continuous, 48 integer (48 binary)

Root relaxation: objective 5.418480e+04, 4158 iterations, 0.37 seconds

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

     0     0 54184.8003    0    4          - 54184.8003     -      -    0s
H    0     0                    55303.000000 54184.8003  2.02%     -    0s
H    0     0                    54449.000000 54184.8003  0.49%     -    0s
     0     0 54186.2470    0    5 54449.0000 54186.2470  0.48%     -    0s
     0     0 54186.2470    0    5 54449.0000 54186.2470  0.48%     -    0s
     0     0 54186.2470    0    5 54449.0000 54186.2470  0.48%     -    1s
     0     2 54186.6126    0    5 54449.0000 54186.6126  0.48%     -    1s
*   10     3               8    54446.000000 54330.7339  0.21%  86.9    1s

Cutting planes:
  Gomory: 1
  Flow cover: 4

Explored 16 nodes (5479 simplex iterations) in 1.89 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.444600000000e+04, best bound 5.444600000000e+04, gap 0.0%