Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:32:17 2013

Optimize a model with 35518 rows, 34928 columns and 139358 nonzeros
Presolve removed 59 rows and 0 columns
Presolve time: 0.15s
Presolved: 35459 rows, 34928 columns, 139299 nonzeros
Variable types: 34869 continuous, 59 integer (59 binary)

Root relaxation: objective 4.844230e+04, 4053 iterations, 1.64 seconds

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

     0     0 48442.2964    0   47          - 48442.2964     -      -    1s
H    0     0                    63941.000000 48442.2964  24.2%     -    2s
     0     0 55153.8962    0   13 63941.0000 55153.8962  13.7%     -    5s
H    0     0                    62019.000000 55153.8962  11.1%     -    5s
     0     0 55915.5168    0    3 62019.0000 55915.5168  9.84%     -    6s
H    0     0                    58532.405932 55915.5168  4.47%     -    6s
H    0     0                    57896.000000 55915.5168  3.42%     -    6s
     0     2 55917.0740    0    3 57896.0000 55917.0740  3.42%     -    7s
H    1     1                    57394.230075 55917.0740  2.57%   0.0    7s
H    2     2                    56675.146341 55959.4451  1.26%  83.5    7s
H    4     3                    56182.571429 56064.2305  0.21%   245    7s
H    5     3                    56161.929844 56064.2305  0.17%   200    7s
H    6     3                    56152.000000 56064.2305  0.16%   183    7s
*    9     4               8    56124.000000 56064.2305  0.11%   139    7s

Cutting planes:
  Implied bound: 56

Explored 14 nodes (9010 simplex iterations) in 7.94 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.612400000000e+04, best bound 5.612400000000e+04, gap 0.0%