Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:38:28 2013

Optimize a model with 37942 rows, 37332 columns and 148962 nonzeros
Presolve removed 61 rows and 0 columns
Presolve time: 0.16s
Presolved: 37881 rows, 37332 columns, 148901 nonzeros
Variable types: 37271 continuous, 61 integer (61 binary)

Root relaxation: objective 5.566692e+04, 5405 iterations, 3.44 seconds

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

     0     0 55666.9205    0   52          - 55666.9205     -      -    3s
H    0     0                    84153.000000 55666.9205  33.9%     -    6s
     0     0 72396.1031    0    8 84153.0000 72396.1031  14.0%     -    9s
H    0     0                    76765.091523 72396.1031  5.69%     -    9s
H    0     0                    75429.000000 72396.1031  4.02%     -    9s
     0     0 73575.5331    0    4 75429.0000 73575.5331  2.46%     -   10s
     0     0 73646.7949    0    4 75429.0000 73646.7949  2.36%     -   10s
     0     0 73657.2431    0    3 75429.0000 73657.2431  2.35%     -   11s
H    0     0                    75217.000000 73657.2431  2.07%     -   11s
     0     2 73671.3902    0    3 75217.0000 73671.3902  2.05%     -   11s
H    1     1                    74377.315789 73671.3902  0.95%   0.0   11s
H    2     2                    74147.456140 73738.0928  0.55%   102   11s
H    4     4                    73970.000644 73743.3665  0.31%  76.8   12s
H    5     4                    73911.687500 73743.3665  0.23%  91.8   12s
*    6     4               5    73797.000000 73743.3665  0.07%  79.0   12s

Cutting planes:
  Implied bound: 54

Explored 10 nodes (11320 simplex iterations) in 12.30 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.379700000000e+04, best bound 7.379700000000e+04, gap 0.0%