Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:13:12 2013

Optimize a model with 48369 rows, 47679 columns and 190509 nonzeros
Presolve removed 1515 rows and 0 columns
Presolve time: 0.28s
Presolved: 46854 rows, 47679 columns, 187479 nonzeros
Variable types: 47610 continuous, 69 integer (69 binary)

Root relaxation: objective 7.525657e+04, 10262 iterations, 1.76 seconds

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

     0     0 75256.5670    0    3          - 75256.5670     -      -    2s
H    0     0                    76652.000000 75256.5670  1.82%     -    2s
H    0     0                    76494.000000 75256.5670  1.62%     -    2s
     0     0 75268.0097    0    4 76494.0000 75268.0097  1.60%     -    2s
H    0     0                    76410.000000 75268.0097  1.49%     -    2s
     0     0 75268.0286    0    4 76410.0000 75268.0286  1.49%     -    3s
     0     0 75268.0631    0    4 76410.0000 75268.0631  1.49%     -    3s
     0     0 75268.0631    0    4 76410.0000 75268.0631  1.49%     -    3s
     0     2 75268.7371    0    4 76410.0000 75268.7371  1.49%     -    5s
*    3     3               3    75411.000000 75411.0000   0.0%   176    5s

Cutting planes:
  Gomory: 2
  Flow cover: 7

Explored 4 nodes (10843 simplex iterations) in 5.42 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.541100000000e+04, best bound 7.541100000000e+04, gap 0.0%