Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:04:40 2013

Optimize a model with 45694 rows, 45024 columns and 179694 nonzeros
Presolve removed 67 rows and 0 columns
Presolve time: 0.20s
Presolved: 45627 rows, 45024 columns, 179627 nonzeros
Variable types: 44957 continuous, 67 integer (67 binary)

Root relaxation: objective 5.698647e+04, 6595 iterations, 4.18 seconds

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

     0     0 56986.4736    0   49          - 56986.4736     -      -    4s
H    0     0                    86658.000000 56986.4736  34.2%     -    7s
     0     0 71432.1202    0   20 86658.0000 71432.1202  17.6%     -   13s
H    0     0                    81686.000000 71432.1202  12.6%     -   13s
     0     0 74294.7383    0    6 81686.0000 74294.7383  9.05%     -   15s
H    0     0                    78958.710184 74294.7383  5.91%     -   15s
H    0     0                    77816.000000 74294.7383  4.53%     -   15s
H    0     0                    74711.000000 74294.7383  0.56%     -   15s
     0     0 74352.0066    0    5 74711.0000 74352.0066  0.48%     -   16s
     0     0 74427.9756    0    4 74711.0000 74427.9756  0.38%     -   16s
     0     2 74428.0447    0    4 74711.0000 74428.0447  0.38%     -   17s

Cutting planes:
  Implied bound: 62

Explored 8 nodes (14941 simplex iterations) in 17.83 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.471100000000e+04, best bound 7.471100000000e+04, gap 0.0%