Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:23:01 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 6.418877e+04, 7471 iterations, 4.77 seconds

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

     0     0 64188.7680    0   52          - 64188.7680     -      -    5s
H    0     0                    101788.00000 64188.7680  36.9%     -    8s
     0     0 79149.0288    0   13 101788.000 79149.0288  22.2%     -   14s
H    0     0                    97328.858139 79149.0288  18.7%     -   14s
H    0     0                    86118.000000 79149.0288  8.09%     -   15s
     0     0 81206.6498    0   10 86118.0000 81206.6498  5.70%     -   16s
     0     0 81456.6344    0    5 86118.0000 81456.6344  5.41%     -   17s
     0     0 81481.1802    0    4 86118.0000 81481.1802  5.38%     -   17s
H    0     0                    85572.584501 81481.1802  4.78%     -   17s
H    0     0                    84203.000000 81481.1802  3.23%     -   17s
H    0     0                    83028.000000 81481.1802  1.86%     -   17s
     0     2 81482.0278    0    4 83028.0000 81482.0278  1.86%     -   18s
H    2     2                    82231.860704 81504.0444  0.89%  35.5   19s
H    3     3                    81588.000000 81545.7219  0.05%  83.3   19s
*    6     5               5    81563.000000 81549.2603  0.02%   102   19s

Cutting planes:
  Implied bound: 64

Explored 10 nodes (15980 simplex iterations) in 19.37 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.156300000000e+04, best bound 8.156300000000e+04, gap 0.0%