Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:05:53 2013

Optimize a model with 22607 rows, 22137 columns and 88407 nonzeros
Presolve removed 2198 rows and 0 columns
Presolve time: 0.12s
Presolved: 20409 rows, 22137 columns, 84011 nonzeros
Variable types: 22090 continuous, 47 integer (47 binary)

Root relaxation: objective 5.018971e+04, 3898 iterations, 0.36 seconds

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

     0     0 50189.7103    0    4          - 50189.7103     -      -    0s
H    0     0                    51137.000000 50189.7103  1.85%     -    0s
     0     0 50192.3450    0    6 51137.0000 50192.3450  1.85%     -    0s
     0     0 50192.6075    0    6 51137.0000 50192.6075  1.85%     -    0s
     0     2 50196.1757    0    6 51137.0000 50196.1757  1.84%     -    1s
H    3     3                    50567.857143 50216.6068  0.69%  21.7    1s
H    9     9                    50493.375000 50217.1640  0.55%  44.1    1s
*   14     8              12    50454.000000 50217.1640  0.47%  35.9    1s
*   15     7              10    50448.000000 50217.1640  0.46%  34.1    1s
H   16     6                    50406.448276 50217.1640  0.38%  32.0    1s
H   17     7                    50379.333333 50260.6190  0.24%  33.6    1s
H   19     7                    50363.533333 50264.5077  0.20%  31.4    1s
*   20     4               7    50291.000000 50264.5077  0.05%  31.4    1s
*   24     0               7    50282.000000 50282.0000   0.0%  27.8    1s

Cutting planes:
  Gomory: 2
  Flow cover: 1

Explored 25 nodes (4619 simplex iterations) in 1.70 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.028200000000e+04, best bound 5.028200000000e+04, gap 0.0%