Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:48 2012

Optimize a model with 465 rows, 133 columns and 930 nonzeros
Presolve removed 102 rows and 2 columns
Presolve time: 0.00s
Presolved: 363 rows, 131 columns, 783 nonzeros
Variable types: 0 continuous, 131 integer (131 binary)
Found heuristic solution: objective 45.0000000

Root relaxation: objective 5.700000e+01, 149 iterations, 0.00 seconds

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

     0     0   57.00000    0  102   45.00000   57.00000  26.7%     -    0s
H    0     0                      49.0000000   57.00000  16.3%     -    0s
     0     0   56.00000    0  104   49.00000   56.00000  14.3%     -    0s
     0     0   55.36364    0  127   49.00000   55.36364  13.0%     -    0s
H    0     0                      51.0000000   55.36364  8.56%     -    0s
     0     0   54.41667    0  126   51.00000   54.41667  6.70%     -    0s
     0     0   54.11161    0  130   51.00000   54.11161  6.10%     -    0s
     0     0   53.62963    0  129   51.00000   53.62963  5.16%     -    0s
     0     0   53.40000    0  125   51.00000   53.40000  4.71%     -    0s
     0     0   53.32692    0  123   51.00000   53.32692  4.56%     -    0s
     0     0   53.25444    0  126   51.00000   53.25444  4.42%     -    0s
H    0     0                      52.0000000   53.25444  2.41%     -    0s
     0     0   53.24283    0  129   52.00000   53.24283  2.39%     -    0s
     0     0   53.24283    0  127   52.00000   53.24283  2.39%     -    0s
     0     2   53.23779    0  127   52.00000   53.23779  2.38%     -    0s

Cutting planes:
  Zero half: 38

Explored 3 nodes (937 simplex iterations) in 0.08 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%