Gurobi 5.0.1 (linux64) logging started Wed Apr 24 03:00:14 2013

Optimize a model with 58596 rows, 57836 columns and 231116 nonzeros
Presolve removed 4516 rows and 0 columns
Presolve time: 0.37s
Presolved: 54080 rows, 57836 columns, 222084 nonzeros
Variable types: 57760 continuous, 76 integer (76 binary)

Root relaxation: objective 9.117421e+04, 14326 iterations, 2.99 seconds

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

     0     0 91174.2060    0    4          - 91174.2060     -      -    3s
H    0     0                    92455.000000 91174.2060  1.39%     -    3s
     0     0 91174.9717    0    6 92455.0000 91174.9717  1.38%     -    4s
     0     0 91174.9851    0    6 92455.0000 91174.9851  1.38%     -    4s
H    0     0                    92114.470588 91174.9851  1.02%     -    6s
H    0     0                    91702.000000 91174.9851  0.57%     -    6s
     0     0 91174.9851    0    4 91702.0000 91174.9851  0.57%     -    9s
     0     0 91175.3082    0    7 91702.0000 91175.3082  0.57%     -    9s
     0     0 91175.3147    0    7 91702.0000 91175.3147  0.57%     -    9s
     0     0 91175.3147    0    7 91702.0000 91175.3147  0.57%     -   10s
     0     2 91178.0597    0    7 91702.0000 91178.0597  0.57%     -   11s
H   14     7                    91502.000000 91244.9883  0.28%  89.4   12s
H   16     7                    91500.000000 91244.9883  0.28%  83.6   12s
*   17     8              16    91464.000000 91244.9883  0.24%  82.0   12s
*   21     5               5    91399.000000 91268.9332  0.14%  75.1   13s

Cutting planes:
  Gomory: 2
  Flow cover: 4

Explored 29 nodes (23627 simplex iterations) in 13.32 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 9.139900000000e+04, best bound 9.139252272727e+04, gap 0.0071%