Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:05:09 2013

Optimize a model with 21712 rows, 21252 columns and 84732 nonzeros
Presolve removed 46 rows and 0 columns
Presolve time: 0.09s
Presolved: 21666 rows, 21252 columns, 84686 nonzeros
Variable types: 21206 continuous, 46 integer (46 binary)

Root relaxation: objective 4.579697e+04, 3711 iterations, 1.29 seconds

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

     0     0 45796.9723    0   44          - 45796.9723     -      -    1s
H    0     0                    60104.000000 45796.9723  23.8%     -    2s
     0     0 57255.3339    0    3 60104.0000 57255.3339  4.74%     -    3s
H    0     0                    58061.323077 57255.3339  1.39%     -    3s
H    0     0                    57908.000000 57255.3339  1.13%     -    3s
H    0     0                    57614.000000 57255.3339  0.62%     -    3s
H    0     0                    57331.000000 57255.3339  0.13%     -    3s
     0     0     cutoff    0      57331.0000 57331.0000   0.0%     -    3s

Cutting planes:
  Implied bound: 40

Explored 1 nodes (5400 simplex iterations) in 3.35 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.733100000000e+04, best bound 5.733100000000e+04, gap 0.0%