Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:36:48 2013

Optimize a model with 37881 rows, 37271 columns and 148901 nonzeros
Presolve removed 2305 rows and 0 columns
Presolve time: 0.21s
Presolved: 35576 rows, 37271 columns, 144291 nonzeros
Variable types: 37210 continuous, 61 integer (61 binary)

Root relaxation: objective 7.124519e+04, 8332 iterations, 1.15 seconds

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

     0     0 71245.1882    0    4          - 71245.1882     -      -    1s
H    0     0                    72176.000000 71245.1882  1.29%     -    1s
     0     0 71246.0348    0    6 72176.0000 71246.0348  1.29%     -    1s
     0     0 71246.3122    0    6 72176.0000 71246.3122  1.29%     -    2s
     0     0 71246.4501    0    6 72176.0000 71246.4501  1.29%     -    2s
     0     0 71246.4909    0    5 72176.0000 71246.4909  1.29%     -    2s
     0     0 71246.6682    0    7 72176.0000 71246.6682  1.29%     -    2s
H    0     0                    71729.835002 71246.6682  0.67%     -    3s
H    0     0                    71458.454118 71246.6682  0.30%     -    3s
H    0     0                    71443.000000 71246.6682  0.27%     -    3s
     0     0 71298.9317    0    4 71443.0000 71298.9317  0.20%     -    4s
     0     0 71300.5300    0    5 71443.0000 71300.5300  0.20%     -    4s
     0     0 71300.7087    0    5 71443.0000 71300.7087  0.20%     -    4s
     0     0 71300.7087    0    5 71443.0000 71300.7087  0.20%     -    5s
     0     0 71415.5911    0    4 71443.0000 71415.5911  0.04%     -    5s
     0     2 71415.9147    0    4 71443.0000 71415.9147  0.04%     -    5s

Cutting planes:
  Gomory: 1
  Flow cover: 2

Explored 7 nodes (11798 simplex iterations) in 5.71 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.144300000000e+04, best bound 7.144300000000e+04, gap 0.0%