Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:14:58 2013

Optimize a model with 48438 rows, 47748 columns and 190578 nonzeros
Presolve removed 69 rows and 0 columns
Presolve time: 0.21s
Presolved: 48369 rows, 47748 columns, 190509 nonzeros
Variable types: 47679 continuous, 69 integer (69 binary)

Root relaxation: objective 5.979368e+04, 6639 iterations, 3.68 seconds

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

     0     0 59793.6769    0   50          - 59793.6769     -      -    4s
H    0     0                    85461.000000 59793.6769  30.0%     -    6s
     0     0 71629.7289    0   19 85461.0000 71629.7289  16.2%     -   12s
     0     0 75839.5865    0    6 85461.0000 75839.5865  11.3%     -   15s
H    0     0                    82765.049536 75839.5865  8.37%     -   15s
H    0     0                    81156.000000 75839.5865  6.55%     -   15s
     0     0 76073.8653    0    5 81156.0000 76073.8653  6.26%     -   16s
H    0     0                    79918.875758 76073.8653  4.81%     -   16s
H    0     0                    78881.000000 76073.8653  3.56%     -   16s
H    0     0                    76914.000000 76073.8653  1.09%     -   16s
     0     2 76074.5057    0    5 76914.0000 76074.5057  1.09%     -   17s
*    9     6               8    76624.000000 76192.0649  0.56%   277   19s
    16     8 76547.3263    4    2 76624.0000 76276.2065  0.45%   274   20s
H   42     8                    76599.000000 76414.8333  0.24%   147   21s
*   46     2              17    76468.000000 76422.9279  0.06%   139   21s

Cutting planes:
  Implied bound: 62

Explored 49 nodes (20835 simplex iterations) in 21.50 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.646800000000e+04, best bound 7.646800000000e+04, gap 0.0%