Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:44:37 2013

Optimize a model with 40446 rows, 39816 columns and 158886 nonzeros
Presolve removed 63 rows and 0 columns
Presolve time: 0.18s
Presolved: 40383 rows, 39816 columns, 158823 nonzeros
Variable types: 39753 continuous, 63 integer (63 binary)

Root relaxation: objective 5.851723e+04, 6033 iterations, 3.30 seconds

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

     0     0 58517.2282    0   52          - 58517.2282     -      -    3s
H    0     0                    85657.000000 58517.2282  31.7%     -    6s
     0     0 72158.7688    0    8 85657.0000 72158.7688  15.8%     -    9s
H    0     0                    83954.859146 72158.7688  14.1%     -    9s
H    0     0                    79611.000000 72158.7688  9.36%     -    9s
     0     0 75124.8624    0    4 79611.0000 75124.8624  5.64%     -   10s
H    0     0                    78496.414712 75124.8624  4.30%     -   10s
H    0     0                    77308.000000 75124.8624  2.82%     -   10s
     0     0 75296.3978    0    4 77308.0000 75296.3978  2.60%     -   11s
H    0     0                    76130.000000 75296.3978  1.09%     -   11s
H    0     0                    75595.000000 75296.3978  0.40%     -   11s
H    0     0                    75370.000000 75296.3978  0.10%     -   11s
     0     2 75301.7773    0    3 75370.0000 75301.7773  0.09%     -   12s
*    4     4               3    75363.000000 75342.8522  0.03%  58.5   12s

Cutting planes:
  Implied bound: 59

Explored 9 nodes (11755 simplex iterations) in 12.34 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.536300000000e+04, best bound 7.536300000000e+04, gap 0.0%