Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:03:37 2013

Optimize a model with 495 rows, 20295 columns and 40545 nonzeros
Presolve time: 0.03s
Presolved: 495 rows, 20295 columns, 40545 nonzeros
Variable types: 20250 continuous, 45 integer (45 binary)

Root relaxation: objective 5.556770e+04, 1191 iterations, 0.03 seconds

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

     0     0 55567.7021    0    4          - 55567.7021     -      -    0s
H    0     0                    56235.000000 55567.7021  1.19%     -    0s
     0     0 55614.7816    0    4 56235.0000 55614.7816  1.10%     -    0s
     0     0 55618.0841    0    3 56235.0000 55618.0841  1.10%     -    0s
     0     0 55621.0327    0    3 56235.0000 55621.0327  1.09%     -    0s
     0     0 55621.0327    0    3 56235.0000 55621.0327  1.09%     -    0s
     0     0 55621.0327    0    3 56235.0000 55621.0327  1.09%     -    0s
     0     0 55621.0327    0    3 56235.0000 55621.0327  1.09%     -    0s
     0     2 55625.3889    0    3 56235.0000 55625.3889  1.08%     -    0s
H    3     2                    55821.500000 55698.5000  0.22%  49.0    0s
H    4     2                    55775.000000 55699.5000  0.14%  37.2    0s
H    8     2                    55757.333333 55707.0714  0.09%  24.0    0s
*    9     1               7    55721.000000 55707.0714  0.02%  23.2    0s

Cutting planes:
  Implied bound: 59
  Flow cover: 1

Explored 11 nodes (1607 simplex iterations) in 0.48 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.572100000000e+04, best bound 5.572100000000e+04, gap 0.0%