Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:26:52 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 4.795222e+04, 3353 iterations, 1.04 seconds

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

     0     0 47952.2180    0   44          - 47952.2180     -      -    1s
H    0     0                    63879.000000 47952.2180  24.9%     -    1s
     0     0 52481.0814    0    7 63879.0000 52481.0814  17.8%     -    3s
H    0     0                    57854.521121 52481.0814  9.29%     -    3s
H    0     0                    56262.000000 52481.0814  6.72%     -    3s
     0     0 52859.8118    0    8 56262.0000 52859.8118  6.05%     -    4s
H    0     0                    55412.000000 52859.8118  4.61%     -    4s
     0     0 52910.8593    0    3 55412.0000 52910.8593  4.51%     -    4s
H    0     0                    53552.492223 52910.8593  1.20%     -    4s
H    0     0                    53315.000000 52910.8593  0.76%     -    4s
H    0     0                    53070.000000 52910.8593  0.30%     -    4s
H    0     0                    53017.000000 52910.8593  0.20%     -    5s
     0     2 52914.9688    0    2 53017.0000 52914.9688  0.19%     -    5s

Cutting planes:
  Implied bound: 47

Explored 7 nodes (6197 simplex iterations) in 5.49 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.301700000000e+04, best bound 5.301637777778e+04, gap 0.0012%