Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:10:05 2013

Optimize a model with 24598 rows, 24108 columns and 96138 nonzeros
Presolve removed 49 rows and 0 columns
Presolve time: 0.10s
Presolved: 24549 rows, 24108 columns, 96089 nonzeros
Variable types: 24059 continuous, 49 integer (49 binary)

Root relaxation: objective 4.518536e+04, 3288 iterations, 1.05 seconds

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

     0     0 45185.3601    0   38          - 45185.3601     -      -    1s
H    0     0                    57338.000000 45185.3601  21.2%     -    1s
     0     0 53286.6175    0   11 57338.0000 53286.6175  7.07%     -    3s
H    0     0                    55823.000000 53286.6175  4.54%     -    3s
     0     0 54088.2571    0    4 55823.0000 54088.2571  3.11%     -    3s
H    0     0                    55771.719199 54088.2571  3.02%     -    3s
H    0     0                    55328.000000 54088.2571  2.24%     -    3s
H    0     0                    55023.000000 54088.2571  1.70%     -    4s
     0     2 54089.2466    0    4 55023.0000 54089.2466  1.70%     -    4s
H    5     4                    54447.000000 54135.9185  0.57%  58.4    4s
*    6     3               6    54155.000000 54135.9185  0.04%  77.2    4s

Cutting planes:
  Implied bound: 42

Explored 9 nodes (6449 simplex iterations) in 4.41 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.415500000000e+04, best bound 5.415500000000e+04, gap 0.0%