Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:16:01 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 5.789182e+04, 5150 iterations, 2.95 seconds

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

     0     0 57891.8155    0   55          - 57891.8155     -      -    3s
H    0     0                    90826.000000 57891.8155  36.3%     -    5s
     0     0 73305.1066    0   10 90826.0000 73305.1066  19.3%     -   10s
H    0     0                    86593.653206 73305.1066  15.3%     -   10s
H    0     0                    80901.000000 73305.1066  9.39%     -   10s
     0     0 74905.7036    0    6 80901.0000 74905.7036  7.41%     -   11s
H    0     0                    78412.866117 74905.7036  4.47%     -   11s
H    0     0                    77524.000000 74905.7036  3.38%     -   11s
H    0     0                    77081.000000 74905.7036  2.82%     -   12s
     0     0 74912.9403    0    4 77081.0000 74912.9403  2.81%     -   12s
H    0     0                    76650.273868 74912.9403  2.27%     -   12s
H    0     0                    76138.000000 74912.9403  1.61%     -   12s
H    0     0                    75209.000000 74912.9403  0.39%     -   12s
     0     2 74913.3847    0    4 75209.0000 74913.3847  0.39%     -   13s
*   12     7              10    75086.000000 74989.2824  0.13%  95.6   14s
*   20     4               5    75070.000000 74989.9174  0.11%  89.6   14s

Cutting planes:
  Implied bound: 60

Explored 26 nodes (13456 simplex iterations) in 14.95 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.507000000000e+04, best bound 7.507000000000e+04, gap 0.0%