Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:14:38 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 4.719529e+04, 3801 iterations, 1.56 seconds

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

     0     0 47195.2877    0   45          - 47195.2877     -      -    1s
H    0     0                    65149.000000 47195.2877  27.6%     -    3s
     0     0 55418.6441    0    6 65149.0000 55418.6441  14.9%     -    5s
H    0     0                    58765.929462 55418.6441  5.70%     -    5s
H    0     0                    56952.000000 55418.6441  2.69%     -    5s
     0     0 55860.9283    0    4 56952.0000 55860.9283  1.92%     -    5s
     0     0 55867.7711    0    4 56952.0000 55867.7711  1.90%     -    5s
H    0     0                    56838.000000 55867.7711  1.71%     -    6s
     0     2 55868.1911    0    4 56838.0000 55868.1911  1.71%     -    6s
H    3     3                    56077.000000 55891.1173  0.33%  57.0    6s
H    4     3                    56008.931092 55922.8504  0.15%  81.8    6s
H    6     4                    55989.823529 55923.4706  0.12%  69.2    6s
H    8     5                    55983.023256 55924.7500  0.10%  56.0    6s
*    9     5               8    55938.000000 55924.7500  0.02%  54.0    6s

Cutting planes:
  Gomory: 1
  Implied bound: 49

Explored 13 nodes (7577 simplex iterations) in 6.93 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.593800000000e+04, best bound 5.593421637427e+04, gap 0.0068%