Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:39:38 2013

Optimize a model with 39122 rows, 38502 columns and 153822 nonzeros
Presolve removed 2888 rows and 0 columns
Presolve time: 0.23s
Presolved: 36234 rows, 38502 columns, 148046 nonzeros
Variable types: 38440 continuous, 62 integer (62 binary)

Root relaxation: objective 7.077606e+04, 8903 iterations, 1.28 seconds

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

     0     0 70776.0556    0    3          - 70776.0556     -      -    1s
H    0     0                    71639.000000 70776.0556  1.20%     -    1s
H    0     0                    71010.000000 70776.0556  0.33%     -    1s
     0     0 70779.6489    0    4 71010.0000 70779.6489  0.32%     -    1s
H    0     0                    70985.000000 70779.6489  0.29%     -    2s
     0     0 70980.5161    0    1 70985.0000 70980.5161  0.01%     -    2s

Cutting planes:
  Gomory: 1
  Flow cover: 1

Explored 0 nodes (9104 simplex iterations) in 2.50 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.098500000000e+04, best bound 7.098051612903e+04, gap 0.0063%