Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:05:18 2013

Optimize a model with 21712 rows, 21252 columns and 84732 nonzeros
Presolve removed 46 rows and 0 columns
Presolve time: 0.09s
Presolved: 21666 rows, 21252 columns, 84686 nonzeros
Variable types: 21206 continuous, 46 integer (46 binary)

Root relaxation: objective 3.941071e+04, 2764 iterations, 0.61 seconds

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

     0     0 39410.7138    0   43          - 39410.7138     -      -    0s
H    0     0                    49472.000000 39410.7138  20.3%     -    1s
     0     0 44137.1753    0    7 49472.0000 44137.1753  10.8%     -    2s
H    0     0                    46883.336170 44137.1753  5.86%     -    2s
H    0     0                    46309.000000 44137.1753  4.69%     -    2s
H    0     0                    44436.000000 44137.1753  0.67%     -    2s
     0     0 44254.8132    0    5 44436.0000 44254.8132  0.41%     -    2s
     0     0 44259.8366    0    3 44436.0000 44259.8366  0.40%     -    2s
     0     2 44265.8353    0    3 44436.0000 44265.8353  0.38%     -    2s
*    5     3               4    44425.000000 44390.8649  0.08%  92.0    2s
*    7     1               2    44407.000000 44400.0000  0.02%  77.1    3s

Cutting planes:
  Gomory: 1
  Implied bound: 37

Explored 9 nodes (4633 simplex iterations) in 3.02 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.440700000000e+04, best bound 4.440700000000e+04, gap 0.0%