Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:14:53 2013

Optimize a model with 27664 rows, 27144 columns and 108264 nonzeros
Presolve removed 52 rows and 0 columns
Presolve time: 0.12s
Presolved: 27612 rows, 27144 columns, 108212 nonzeros
Variable types: 27092 continuous, 52 integer (52 binary)

Root relaxation: objective 4.471034e+04, 4456 iterations, 2.05 seconds

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

     0     0 44710.3383    0   43          - 44710.3383     -      -    2s
H    0     0                    61139.000000 44710.3383  26.9%     -    3s
     0     0 54222.6990    0   11 61139.0000 54222.6990  11.3%     -    4s
H    0     0                    57308.000000 54222.6990  5.38%     -    4s
     0     0 54660.5771    0    4 57308.0000 54660.5771  4.62%     -    5s
H    0     0                    56621.000000 54660.5771  3.46%     -    5s
H    0     0                    56097.000000 54660.5771  2.56%     -    5s
H    0     0                    55087.000000 54660.5771  0.77%     -    5s
     0     2 54727.6321    0    4 55087.0000 54727.6321  0.65%     -    5s
H    9     8                    55041.461538 54785.7331  0.46%  87.2    6s
H   10     9                    55019.315789 54785.7331  0.42%   100    6s
*   11     7               9    54911.000000 54785.7331  0.23%  94.2    6s

Cutting planes:
  Implied bound: 47

Explored 33 nodes (9353 simplex iterations) in 6.80 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.491100000000e+04, best bound 5.491100000000e+04, gap 0.0%