Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:15:01 2013

Optimize a model with 27664 rows, 27144 columns and 108264 nonzeros
Presolve removed 52 rows and 0 columns
Presolve time: 0.12s
Presolved: 27612 rows, 27144 columns, 108212 nonzeros
Variable types: 27092 continuous, 52 integer (52 binary)

Root relaxation: objective 5.099422e+04, 4015 iterations, 1.23 seconds

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

     0     0 50994.2181    0   41          - 50994.2181     -      -    1s
H    0     0                    70437.000000 50994.2181  27.6%     -    2s
     0     0 64101.4657    0    8 70437.0000 64101.4657  8.99%     -    4s
H    0     0                    70309.256179 64101.4657  8.83%     -    4s
H    0     0                    66454.000000 64101.4657  3.54%     -    4s
     0     0 65005.6503    0    5 66454.0000 65005.6503  2.18%     -    5s
H    0     0                    66184.000000 65005.6503  1.78%     -    5s
     0     0 65028.2248    0    2 66184.0000 65028.2248  1.75%     -    5s
     0     2 65035.8857    0    2 66184.0000 65035.8857  1.73%     -    5s
H    5     5                    66182.022901 65073.8102  1.67%  90.8    6s
H    6     6                    65910.454545 65078.2567  1.26%  81.5    6s
H   10    10                    65847.280000 65078.2567  1.17%  86.3    6s
*   11     7              11    65262.000000 65078.2567  0.28%  86.2    6s
H   14     2                    65131.000000 65078.2567  0.08%  68.8    6s
*   15     2               3    65113.000000 65078.7268  0.05%  77.3    6s

Cutting planes:
  Implied bound: 45

Explored 20 nodes (9453 simplex iterations) in 6.66 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.511300000000e+04, best bound 6.511300000000e+04, gap 0.0%