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

Optimize a model with 41728 rows, 41088 columns and 163968 nonzeros
Presolve removed 64 rows and 0 columns
Presolve time: 0.18s
Presolved: 41664 rows, 41088 columns, 163904 nonzeros
Variable types: 41024 continuous, 64 integer (64 binary)

Root relaxation: objective 5.122445e+04, 4989 iterations, 2.39 seconds

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

     0     0 51224.4470    0   54          - 51224.4470     -      -    2s
H    0     0                    73845.000000 51224.4470  30.6%     -    3s
     0     0 59408.0890    0   11 73845.0000 59408.0890  19.6%     -    8s
H    0     0                    67207.000000 59408.0890  11.6%     -    8s
     0     0 60722.4788    0    5 67207.0000 60722.4788  9.65%     -    9s
H    0     0                    64323.883016 60722.4788  5.60%     -    9s
H    0     0                    63531.000000 60722.4788  4.42%     -    9s
H    0     0                    63184.596011 60722.4788  3.90%     -   10s
H    0     0                    62156.847458 60722.4788  2.31%     -   10s
     0     2 60736.0665    0    5 62156.8475 60736.0665  2.29%     -   10s
H    6     5                    61707.928571 60981.9756  1.18%   122   11s
H    7     5                    61415.585366 60981.9756  0.71%   145   11s
H   13     9                    61252.000000 60981.9756  0.44%   139   11s
*   25    10              23    61235.000000 60981.9756  0.41%   124   12s
H   27    10                    61219.000000 61076.0775  0.23%   123   12s
*   51     3              14    61179.000000 61124.0000  0.09%   111   13s

Cutting planes:
  Gomory: 1
  Implied bound: 62

Explored 55 nodes (15108 simplex iterations) in 13.85 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.117900000000e+04, best bound 6.117900000000e+04, gap 0.0%