Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:52:48 2013

Optimize a model with 43030 rows, 42380 columns and 169130 nonzeros
Presolve removed 65 rows and 0 columns
Presolve time: 0.19s
Presolved: 42965 rows, 42380 columns, 169065 nonzeros
Variable types: 42315 continuous, 65 integer (65 binary)

Root relaxation: objective 5.440496e+04, 4981 iterations, 2.12 seconds

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

     0     0 54404.9564    0   44          - 54404.9564     -      -    2s
H    0     0                    77754.000000 54404.9564  30.0%     -    3s
H    0     0                    68642.000000 54404.9564  20.7%     -    9s
     0     0 63494.4561    0   12 68642.0000 63494.4561  7.50%     -   13s
H    0     0                    68280.000000 63494.4561  7.01%     -   13s
     0     0 65027.0139    0   15 68280.0000 65027.0139  4.76%     -   15s
     0     0 65904.2010    0    6 68280.0000 65904.2010  3.48%     -   15s
H    0     0                    68261.000000 65904.2010  3.45%     -   15s
H    0     0                    66239.000000 65904.2010  0.51%     -   15s
     0     2 65905.6597    0    6 66239.0000 65905.6597  0.50%     -   16s
*    6     3               4    66138.000000 66009.4448  0.19%   334   17s

Cutting planes:
  Gomory: 1
  Implied bound: 59

Explored 16 nodes (13108 simplex iterations) in 18.14 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.613800000000e+04, best bound 6.613800000000e+04, gap 0.0%