Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:35:22 2013

Optimize a model with 36720 rows, 36120 columns and 144120 nonzeros
Presolve removed 60 rows and 0 columns
Presolve time: 0.16s
Presolved: 36660 rows, 36120 columns, 144060 nonzeros
Variable types: 36060 continuous, 60 integer (60 binary)

Root relaxation: objective 5.151337e+04, 4796 iterations, 2.41 seconds

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

     0     0 51513.3713    0   54          - 51513.3713     -      -    2s
H    0     0                    74079.000000 51513.3713  30.5%     -    3s
     0     0 60099.2159    0    6 74079.0000 60099.2159  18.9%     -    6s
H    0     0                    66854.162162 60099.2159  10.1%     -    6s
H    0     0                    64657.000000 60099.2159  7.05%     -    6s
     0     0 60702.0714    0    4 64657.0000 60702.0714  6.12%     -    6s
H    0     0                    63543.000000 60702.0714  4.47%     -    6s
     0     2 60721.0714    0    4 63543.0000 60721.0714  4.44%     -    7s
H    1     1                    63179.437150 60721.0714  3.89%   0.0    7s
H    4     4                    61437.736842 60838.6787  0.98%   134    8s
H    6     5                    61412.318584 60838.6787  0.93%   143    8s
H    7     5                    61140.000000 60838.6787  0.49%   139    8s
*    8     5               7    60972.000000 60838.6787  0.22%   134    8s

Cutting planes:
  Implied bound: 56

Explored 13 nodes (9881 simplex iterations) in 8.66 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.097200000000e+04, best bound 6.097200000000e+04, gap 0.0%