Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:33:05 2012

Optimize a model with 465 rows, 136 columns and 930 nonzeros
Presolve removed 99 rows and 2 columns
Presolve time: 0.00s
Presolved: 366 rows, 134 columns, 784 nonzeros
Variable types: 0 continuous, 134 integer (134 binary)
Found heuristic solution: objective 45.0000000

Root relaxation: objective 5.802778e+01, 253 iterations, 0.00 seconds

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

     0     0   58.02778    0  131   45.00000   58.02778  29.0%     -    0s
     0     0   57.00980    0  131   45.00000   57.00980  26.7%     -    0s
H    0     0                      48.0000000   57.00980  18.8%     -    0s
     0     0   56.49123    0  131   48.00000   56.49123  17.7%     -    0s
     0     0   55.93338    0  131   48.00000   55.93338  16.5%     -    0s
     0     0   55.70316    0  131   48.00000   55.70316  16.0%     -    0s
H    0     0                      49.0000000   55.70316  13.7%     -    0s
     0     0   55.57956    0  134   49.00000   55.57956  13.4%     -    0s
H    0     0                      52.0000000   55.57956  6.88%     -    0s
     0     0   55.48506    0  133   52.00000   55.48506  6.70%     -    0s
     0     0   55.39868    0  133   52.00000   55.39868  6.54%     -    0s
     0     0   55.37031    0  134   52.00000   55.37031  6.48%     -    0s
     0     0   55.37031    0  133   52.00000   55.37031  6.48%     -    0s
     0     2   55.37009    0  133   52.00000   55.37009  6.48%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 72

Explored 59 nodes (2983 simplex iterations) in 0.16 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.200000000000e+01, best bound 5.200000000000e+01, gap 0.0%