Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:25:49 2013

Optimize a model with 33174 rows, 32604 columns and 130074 nonzeros
Presolve removed 57 rows and 0 columns
Presolve time: 0.14s
Presolved: 33117 rows, 32604 columns, 130017 nonzeros
Variable types: 32547 continuous, 57 integer (57 binary)

Root relaxation: objective 4.675830e+04, 4334 iterations, 2.12 seconds

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

     0     0 46758.2968    0   44          - 46758.2968     -      -    2s
H    0     0                    62701.000000 46758.2968  25.4%     -    3s
     0     0 54240.6841    0   11 62701.0000 54240.6841  13.5%     -    5s
H    0     0                    59832.000000 54240.6841  9.35%     -    5s
     0     0 55067.1236    0    6 59832.0000 55067.1236  7.96%     -    6s
H    0     0                    56519.789120 55067.1236  2.57%     -    6s
H    0     0                    55700.000000 55067.1236  1.14%     -    6s
     0     0 55079.0409    0    3 55700.0000 55079.0409  1.11%     -    6s
     0     2 55079.7546    0    3 55700.0000 55079.7546  1.11%     -    7s
H    1     1                    55602.869919 55079.7546  0.94%   0.0    7s
H    5     4                    55367.909091 55149.4420  0.39%  68.0    7s
H    8     6                    55331.600000 55149.4420  0.33%  97.0    8s
H    9     6                    55305.800000 55149.4420  0.28%  88.0    8s
*   10     5               9    55261.000000 55149.4420  0.20%  86.5    8s
*   15     6               5    55257.000000 55160.3845  0.17%  88.9    8s

Cutting planes:
  Implied bound: 49

Explored 24 nodes (9907 simplex iterations) in 8.42 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.525700000000e+04, best bound 5.525700000000e+04, gap 0.0%