Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:21:26 2013

Optimize a model with 49840 rows, 49140 columns and 196140 nonzeros
Presolve removed 70 rows and 0 columns
Presolve time: 0.22s
Presolved: 49770 rows, 49140 columns, 196070 nonzeros
Variable types: 49070 continuous, 70 integer (70 binary)

Root relaxation: objective 5.975312e+04, 6518 iterations, 4.76 seconds

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

     0     0 59753.1198    0   56          - 59753.1198     -      -    5s
H    0     0                    93070.000000 59753.1198  35.8%     -    8s
     0     0 77116.8993    0   11 93070.0000 77116.8993  17.1%     -   14s
H    0     0                    89693.000000 77116.8993  14.0%     -   15s
     0     0 79720.1456    0    5 89693.0000 79720.1456  11.1%     -   16s
H    0     0                    89424.853607 79720.1456  10.9%     -   16s
H    0     0                    84311.000000 79720.1456  5.45%     -   16s
     0     0 79849.7582    0    3 84311.0000 79849.7582  5.29%     -   16s
H    0     0                    81495.000000 79849.7582  2.02%     -   16s
H    0     0                    81076.000000 79849.7582  1.51%     -   17s
     0     2 79852.0078    0    3 81076.0000 79852.0078  1.51%     -   17s
H    4     4                    80824.000000 79964.8000  1.06%   148   18s
H    5     4                    80209.811321 79964.8000  0.31%   169   18s
*   10     7               8    80167.000000 79969.1549  0.25%   208   19s
    18     2     cutoff    5      80167.0000 80029.9474  0.17%   176   20s
*   23     0               8    80136.000000 80136.0000   0.0%   173   20s

Cutting planes:
  Implied bound: 65

Explored 24 nodes (17192 simplex iterations) in 20.41 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.013600000000e+04, best bound 8.013600000000e+04, gap 0.0%