Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:24:49 2013

Optimize a model with 51191 rows, 50481 columns and 201711 nonzeros
Presolve removed 3670 rows and 0 columns
Presolve time: 0.33s
Presolved: 47521 rows, 50481 columns, 194371 nonzeros
Variable types: 50410 continuous, 71 integer (71 binary)

Root relaxation: objective 7.939834e+04, 11244 iterations, 2.27 seconds

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

     0     0 79398.3419    0    2          - 79398.3419     -      -    2s
H    0     0                    81470.000000 79398.3419  2.54%     -    2s
     0     0 79398.7456    0    4 81470.0000 79398.7456  2.54%     -    3s
H    0     0                    79952.337079 79398.7456  0.69%     -    4s
H    0     0                    79930.000000 79398.7456  0.66%     -    4s
     0     0 79398.7456    0    2 79930.0000 79398.7456  0.66%     -    7s
     0     0 79398.7510    0    4 79930.0000 79398.7510  0.66%     -    7s
     0     2 79409.7974    0    4 79930.0000 79409.7974  0.65%     -    9s
     3     5 79686.3769    2    4 79930.0000 79646.6228  0.35%   276   10s
*   15     6               5    79904.000000 79730.4601  0.22%   134   10s
*   29     5               7    79826.000000 79749.4275  0.10%  97.1   11s

Cutting planes:
  Gomory: 2
  Flow cover: 2

Explored 34 nodes (19120 simplex iterations) in 11.14 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.982600000000e+04, best bound 7.982600000000e+04, gap 0.0%