Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:40:41 2013

Optimize a model with 682 rows, 38502 columns and 76942 nonzeros
Presolve time: 0.05s
Presolved: 682 rows, 38502 columns, 76942 nonzeros
Variable types: 38440 continuous, 62 integer (62 binary)

Root relaxation: objective 7.166394e+04, 1716 iterations, 0.05 seconds

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

     0     0 71663.9387    0    9          - 71663.9387     -      -    0s
H    0     0                    77017.000000 71663.9387  6.95%     -    0s
H    0     0                    76485.000000 71663.9387  6.30%     -    0s
H    0     0                    72922.000000 71663.9387  1.73%     -    0s
     0     0 72238.9923    0    7 72922.0000 72238.9923  0.94%     -    0s
     0     0 72303.0937    0    6 72922.0000 72303.0937  0.85%     -    0s
     0     0 72326.0822    0    5 72922.0000 72326.0822  0.82%     -    0s
     0     0 72326.4122    0    5 72922.0000 72326.4122  0.82%     -    0s
     0     0 72326.4122    0    5 72922.0000 72326.4122  0.82%     -    0s
     0     0 72326.4122    0    9 72922.0000 72326.4122  0.82%     -    0s
     0     0 72326.4122    0    7 72922.0000 72326.4122  0.82%     -    0s
     0     0 72326.4122    0    6 72922.0000 72326.4122  0.82%     -    0s
     0     0 72326.4122    0    5 72922.0000 72326.4122  0.82%     -    1s
     0     0 72327.1640    0    5 72922.0000 72327.1640  0.82%     -    1s
     0     0 72327.1640    0    5 72922.0000 72327.1640  0.82%     -    1s
     0     2 72347.5533    0    5 72922.0000 72347.5533  0.79%     -    1s
*    8     6               6    72615.000000 72517.0111  0.13%  86.1    1s

Cutting planes:
  Implied bound: 141
  Flow cover: 6

Explored 16 nodes (4987 simplex iterations) in 1.68 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.261500000000e+04, best bound 7.261372531847e+04, gap 0.0018%