Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:47:39 2013

Optimize a model with 41664 rows, 41024 columns and 163904 nonzeros
Presolve removed 2459 rows and 0 columns
Presolve time: 0.25s
Presolved: 39205 rows, 41024 columns, 158986 nonzeros
Variable types: 40960 continuous, 64 integer (64 binary)

Root relaxation: objective 7.233625e+04, 9251 iterations, 1.44 seconds

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

     0     0 72336.2480    0    5          - 72336.2480     -      -    1s
H    0     0                    73355.000000 72336.2480  1.39%     -    1s
     0     0 72337.4228    0    7 73355.0000 72337.4228  1.39%     -    2s
     0     0 72337.8382    0    7 73355.0000 72337.8382  1.39%     -    2s
     0     0 72337.8382    0    7 73355.0000 72337.8382  1.39%     -    2s
H    0     0                    72701.000000 72337.8382  0.50%     -    3s
     0     0 72337.8382    0    5 72701.0000 72337.8382  0.50%     -    4s
     0     0 72337.8382    0    7 72701.0000 72337.8382  0.50%     -    5s
     0     0 72337.8473    0    7 72701.0000 72337.8473  0.50%     -    5s
     0     2 72341.0527    0    7 72701.0000 72341.0527  0.50%     -    5s
*    8     6               8    72455.000000 72417.1064  0.05%  52.5    6s

Cutting planes:
  Gomory: 2
  Flow cover: 5

Explored 13 nodes (14116 simplex iterations) in 6.38 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.245500000000e+04, best bound 7.245500000000e+04, gap 0.0%