Gurobi 5.0.1 (linux64) logging started Wed Apr 24 03:10:33 2013

Optimize a model with 847 rows, 59367 columns and 118657 nonzeros
Presolve time: 0.09s
Presolved: 847 rows, 59367 columns, 118657 nonzeros
Variable types: 59290 continuous, 77 integer (77 binary)

Root relaxation: objective 8.779577e+04, 2201 iterations, 0.07 seconds

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

     0     0 87795.7660    0    7          - 87795.7660     -      -    0s
H    0     0                    93008.000000 87795.7660  5.60%     -    0s
     0     0 88314.1808    0    6 93008.0000 88314.1808  5.05%     -    0s
     0     0 88430.5893    0    5 93008.0000 88430.5893  4.92%     -    0s
     0     0 88443.3600    0    6 93008.0000 88443.3600  4.91%     -    0s
     0     0 88453.1575    0    5 93008.0000 88453.1575  4.90%     -    0s
     0     0 88453.5653    0    6 93008.0000 88453.5653  4.90%     -    0s
     0     0 88454.3748    0    5 93008.0000 88454.3748  4.90%     -    1s
     0     0 88454.3748    0    5 93008.0000 88454.3748  4.90%     -    1s
     0     0 88454.3748    0    5 93008.0000 88454.3748  4.90%     -    1s
     0     2 88464.1695    0    5 93008.0000 88464.1695  4.89%     -    1s
H    5     5                    90396.675000 88513.2896  2.08%  39.2    1s
H    7     7                    88891.000000 88513.2896  0.42%  40.1    1s
*    8     7               8    88597.000000 88513.2896  0.09%  41.9    1s
*    9     5               8    88582.000000 88513.2896  0.08%  39.7    1s

Cutting planes:
  Implied bound: 96
  Flow cover: 7

Explored 18 nodes (3172 simplex iterations) in 1.95 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.858200000000e+04, best bound 8.858200000000e+04, gap 0.0%