Gurobi 5.0.1 (linux64) logging started Wed Apr 24 04:27:00 2013

Optimize a model with 924 rows, 70644 columns and 141204 nonzeros
Presolve time: 0.11s
Presolved: 924 rows, 70644 columns, 141204 nonzeros
Variable types: 70560 continuous, 84 integer (84 binary)

Root relaxation: objective 8.757390e+04, 2552 iterations, 0.10 seconds

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

     0     0 87573.9027    0    8          - 87573.9027     -      -    0s
H    0     0                    92973.000000 87573.9027  5.81%     -    0s
H    0     0                    88279.000000 87573.9027  0.80%     -    0s
     0     0 87781.5852    0    4 88279.0000 87781.5852  0.56%     -    0s
     0     0 87781.5852    0    8 88279.0000 87781.5852  0.56%     -    0s
     0     0 87781.5852    0    4 88279.0000 87781.5852  0.56%     -    1s
     0     0 87796.1465    0    4 88279.0000 87796.1465  0.55%     -    1s
     0     0 87814.0459    0    4 88279.0000 87814.0459  0.53%     -    1s
     0     0 87818.8676    0    4 88279.0000 87818.8676  0.52%     -    1s
     0     0 87818.8676    0    4 88279.0000 87818.8676  0.52%     -    1s
     0     2 87849.3425    0    4 88279.0000 87849.3425  0.49%     -    1s
*    5     3               5    88209.000000 88109.8039  0.11%  68.4    1s
H    7     3                    88188.000000 88109.8039  0.09%  55.7    1s
*    8     3               7    88154.000000 88109.8039  0.05%  49.6    1s

Cutting planes:
  Implied bound: 71
  Flow cover: 5

Explored 12 nodes (5776 simplex iterations) in 1.96 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.815400000000e+04, best bound 8.815400000000e+04, gap 0.0%