Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:16:33 2013

Optimize a model with 28726 rows, 28196 columns and 112466 nonzeros
Presolve removed 53 rows and 0 columns
Presolve time: 0.13s
Presolved: 28673 rows, 28196 columns, 112413 nonzeros
Variable types: 28143 continuous, 53 integer (53 binary)

Root relaxation: objective 5.085104e+04, 4878 iterations, 1.70 seconds

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

     0     0 50851.0436    0   46          - 50851.0436     -      -    1s
H    0     0                    64928.000000 50851.0436  21.7%     -    2s
     0     0 59358.7471    0    4 64928.0000 59358.7471  8.58%     -    4s
H    0     0                    60786.494906 59358.7471  2.35%     -    4s
H    0     0                    60271.000000 59358.7471  1.51%     -    4s
     0     0 59940.9856    0    4 60271.0000 59940.9856  0.55%     -    4s
     0     0 59982.9914    0    3 60271.0000 59982.9914  0.48%     -    4s
H    0     0                    60212.000000 59982.9914  0.38%     -    5s
     0     2 59986.1719    0    3 60212.0000 59986.1719  0.38%     -    5s
*    4     3               4    60091.000000 60064.5304  0.04%  41.2    5s

Cutting planes:
  Implied bound: 47

Explored 9 nodes (7852 simplex iterations) in 5.42 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.009100000000e+04, best bound 6.009100000000e+04, gap 0.0%