Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:20:50 2013

Optimize a model with 30910 rows, 30360 columns and 121110 nonzeros
Presolve removed 55 rows and 0 columns
Presolve time: 0.13s
Presolved: 30855 rows, 30360 columns, 121055 nonzeros
Variable types: 30305 continuous, 55 integer (55 binary)

Root relaxation: objective 4.788506e+04, 3513 iterations, 1.04 seconds

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

     0     0 47885.0591    0   49          - 47885.0591     -      -    1s
H    0     0                    62720.000000 47885.0591  23.7%     -    1s
     0     0 54100.1000    0   13 62720.0000 54100.1000  13.7%     -    3s
H    0     0                    61498.000000 54100.1000  12.0%     -    3s
     0     0 54282.8907    0    5 61498.0000 54282.8907  11.7%     -    4s
H    0     0                    58216.936641 54282.8907  6.76%     -    4s
H    0     0                    56794.000000 54282.8907  4.42%     -    4s
H    0     0                    55920.000000 54282.8907  2.93%     -    4s
H    0     0                    54456.000000 54282.8907  0.32%     -    4s
     0     2 54291.5851    0    4 54456.0000 54291.5851  0.30%     -    5s

Cutting planes:
  Implied bound: 48

Explored 9 nodes (6665 simplex iterations) in 5.31 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.445600000000e+04, best bound 5.445600000000e+04, gap 0.0%