Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:21:22 2013

Optimize a model with 30910 rows, 30360 columns and 121110 nonzeros
Presolve removed 55 rows and 0 columns
Presolve time: 0.13s
Presolved: 30855 rows, 30360 columns, 121055 nonzeros
Variable types: 30305 continuous, 55 integer (55 binary)

Root relaxation: objective 4.625710e+04, 3522 iterations, 1.26 seconds

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

     0     0 46257.1036    0   48          - 46257.1036     -      -    1s
H    0     0                    60717.000000 46257.1036  23.8%     -    2s
     0     0 55445.6969    0    6 60717.0000 55445.6969  8.68%     -    4s
H    0     0                    57731.932473 55445.6969  3.96%     -    4s
H    0     0                    55809.000000 55445.6969  0.65%     -    4s
     0     0 55533.5397    0    5 55809.0000 55533.5397  0.49%     -    4s
H    0     0                    55802.000000 55533.5397  0.48%     -    4s
H    0     0                    55635.000000 55533.5397  0.18%     -    4s
     0     0 55596.0571    0    2 55635.0000 55596.0571  0.07%     -    4s
     0     0 55617.8653    0    2 55635.0000 55617.8653  0.03%     -    5s
     0     0 55618.0588    0    1 55635.0000 55618.0588  0.03%     -    5s
H    0     0                    55621.000000 55618.0588  0.01%     -    5s

Cutting planes:
  Implied bound: 44

Explored 0 nodes (5722 simplex iterations) in 5.19 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.562100000000e+04, best bound 5.561805882353e+04, gap 0.0053%