Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:21:49 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 6.602377e+04, 7247 iterations, 4.48 seconds

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

     0     0 66023.7738    0   60          - 66023.7738     -      -    4s
H    0     0                    111244.00000 66023.7738  40.6%     -    7s
     0     0 86379.9540    0   13 111244.000 86379.9540  22.4%     -   16s
H    0     0                    94139.000000 86379.9540  8.24%     -   16s
     0     0 88882.1695    0    4 94139.0000 88882.1695  5.58%     -   17s
H    0     0                    93657.042155 88882.1695  5.10%     -   17s
H    0     0                    92444.000000 88882.1695  3.85%     -   17s
     0     0 88916.8749    0    4 92444.0000 88916.8749  3.82%     -   17s
H    0     0                    89440.000000 88916.8749  0.58%     -   18s
     0     0 88917.8641    0    2 89440.0000 88917.8641  0.58%     -   18s
     0     2 88949.0769    0    2 89440.0000 88949.0769  0.55%     -   19s
     5     4 89201.8750    5    1 89440.0000 89164.0157  0.31%   256   20s
H    7     3                    89435.382761 89164.0157  0.30%   222   20s
*    8     3               8    89269.000000 89164.0157  0.12%   228   20s

Cutting planes:
  Implied bound: 69

Explored 12 nodes (17871 simplex iterations) in 20.72 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.926900000000e+04, best bound 8.926900000000e+04, gap 0.0%