Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:14:18 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 5.310878e+04, 5511 iterations, 3.68 seconds

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

     0     0 53108.7811    0   53          - 53108.7811     -      -    4s
H    0     0                    77361.000000 53108.7811  31.3%     -    5s
H    0     0                    66011.000000 53108.7811  19.5%     -   22s
     0     0 62332.8121    0   11 66011.0000 62332.8121  5.57%     -   28s
     0     0 64029.5508    0    6 66011.0000 64029.5508  3.00%     -   29s
     0     0 64168.4526    0    3 66011.0000 64168.4526  2.79%     -   30s
H    0     0                    65886.000000 64168.4526  2.61%     -   30s
H    0     0                    64266.000000 64168.4526  0.15%     -   30s
     0     0 64168.5708    0    2 64266.0000 64168.5708  0.15%     -   30s
     0     0 64168.5924    0    2 64266.0000 64168.5924  0.15%     -   30s
     0     0 64194.8339    0    2 64266.0000 64194.8339  0.11%     -   30s
     0     0 64194.9669    0    1 64266.0000 64194.9669  0.11%     -   31s
     0     0 64194.9669    0   45 64266.0000 64194.9669  0.11%     -   34s
     0     0 64194.9669    0    5 64266.0000 64194.9669  0.11%     -   37s
     0     0 64194.9669    0    1 64266.0000 64194.9669  0.11%     -   37s
     0     0 64261.7329    0    1 64266.0000 64261.7329  0.01%     -   38s

Cutting planes:
  Gomory: 4
  Implied bound: 45

Explored 0 nodes (18204 simplex iterations) in 38.38 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.426600000000e+04, best bound 6.426173291925e+04, gap 0.0066%