Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:33:39 2013

Optimize a model with 36660 rows, 36060 columns and 144060 nonzeros
Presolve removed 1548 rows and 0 columns
Presolve time: 0.21s
Presolved: 35112 rows, 36060 columns, 140964 nonzeros
Variable types: 36000 continuous, 60 integer (60 binary)

Root relaxation: objective 6.991554e+04, 6971 iterations, 0.89 seconds

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

     0     0 69915.5394    0    2          - 69915.5394     -      -    1s
H    0     0                    70359.000000 69915.5394  0.63%     -    1s
H    0     0                    70142.000000 69915.5394  0.32%     -    1s
     0     0 69920.4995    0    3 70142.0000 69920.4995  0.32%     -    1s
     0     0 69920.4995    0    3 70142.0000 69920.4995  0.32%     -    1s
     0     0 69920.4995    0    2 70142.0000 69920.4995  0.32%     -    3s
     0     0 69920.6075    0    4 70142.0000 69920.6075  0.32%     -    3s
     0     2 69923.5112    0    4 70142.0000 69923.5112  0.31%     -    4s
*    7     3               4    70134.000000 70110.1765  0.03%   181    4s
*   10     0               2    70125.000000 70125.0000   0.0%   139    4s

Cutting planes:
  Gomory: 3
  Flow cover: 1

Explored 11 nodes (11596 simplex iterations) in 4.63 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.012500000000e+04, best bound 7.012500000000e+04, gap 0.0%