Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:11:59 2013

Optimize a model with 48369 rows, 47679 columns and 190509 nonzeros
Presolve removed 2595 rows and 0 columns
Presolve time: 0.29s
Presolved: 45774 rows, 47679 columns, 185319 nonzeros
Variable types: 47610 continuous, 69 integer (69 binary)

Root relaxation: objective 7.457499e+04, 9714 iterations, 1.79 seconds

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

     0     0 74574.9876    0    6          - 74574.9876     -      -    2s
H    0     0                    79471.000000 74574.9876  6.16%     -    2s
H    0     0                    74753.000000 74574.9876  0.24%     -    2s
     0     0 74578.6544    0    7 74753.0000 74578.6544  0.23%     -    2s
     0     0 74578.6796    0    7 74753.0000 74578.6796  0.23%     -    3s
     0     0 74578.6796    0    7 74753.0000 74578.6796  0.23%     -    3s
     0     0 74599.7934    0    4 74753.0000 74599.7934  0.20%     -    4s
     0     0 74606.7601    0    5 74753.0000 74606.7601  0.20%     -    4s
     0     0 74607.1040    0    4 74753.0000 74607.1040  0.20%     -    4s
     0     0 74607.1040    0    4 74753.0000 74607.1040  0.20%     -    5s
     0     0 74610.0294    0    5 74753.0000 74610.0294  0.19%     -    6s
     0     0 74610.2644    0    5 74753.0000 74610.2644  0.19%     -    6s
     0     2 74611.4562    0    5 74753.0000 74611.4562  0.19%     -    6s

Cutting planes:
  Gomory: 1
  Flow cover: 2

Explored 10 nodes (13567 simplex iterations) in 7.06 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.475300000000e+04, best bound 7.475300000000e+04, gap 0.0%