Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:48:18 2013

Optimize a model with 55648 rows, 54908 columns and 219188 nonzeros
Presolve removed 74 rows and 0 columns
Presolve time: 0.24s
Presolved: 55574 rows, 54908 columns, 219114 nonzeros
Variable types: 54834 continuous, 74 integer (74 binary)

Root relaxation: objective 6.398634e+04, 6481 iterations, 4.41 seconds

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

     0     0 63986.3354    0   63          - 63986.3354     -      -    4s
H    0     0                    99768.000000 63986.3354  35.9%     -    7s
     0     0 79115.7678    0    9 99768.0000 79115.7678  20.7%     -   12s
H    0     0                    88097.813200 79115.7678  10.2%     -   12s
H    0     0                    86249.000000 79115.7678  8.27%     -   12s
     0     0 80001.9908    0    8 86249.0000 80001.9908  7.24%     -   13s
H    0     0                    83268.000000 80001.9908  3.92%     -   13s
     0     0 80074.7705    0    5 83268.0000 80074.7705  3.83%     -   13s
H    0     0                    81596.973020 80074.7705  1.87%     -   13s
H    0     0                    80765.000000 80074.7705  0.85%     -   14s
H    0     0                    80273.000000 80074.7705  0.25%     -   14s
     0     2 80076.8725    0    5 80273.0000 80076.8725  0.24%     -   15s
H    7     6                    80249.251721 80130.7165  0.15%  73.3   16s
H    8     6                    80244.555556 80130.7165  0.14%  78.9   16s
*    9     5               8    80161.000000 80130.7165  0.04%  76.0   16s

Cutting planes:
  Implied bound: 72

Explored 23 nodes (12849 simplex iterations) in 16.84 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.016100000000e+04, best bound 8.015506896552e+04, gap 0.0074%