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

Optimize a model with 377 rows, 126 columns and 754 nonzeros
Presolve removed 71 rows and 2 columns
Presolve time: 0.00s
Presolved: 306 rows, 124 columns, 654 nonzeros
Variable types: 0 continuous, 124 integer (124 binary)
Found heuristic solution: objective 44.0000000

Root relaxation: objective 5.550000e+01, 164 iterations, 0.00 seconds

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

     0     0   55.50000    0  107   44.00000   55.50000  26.1%     -    0s
     0     0   53.75000    0  108   44.00000   53.75000  22.2%     -    0s
     0     0   53.28814    0  123   44.00000   53.28814  21.1%     -    0s
H    0     0                      45.0000000   53.28814  18.4%     -    0s
     0     0   52.56977    0  122   45.00000   52.56977  16.8%     -    0s
H    0     0                      48.0000000   52.56977  9.52%     -    0s
     0     0   52.15619    0  121   48.00000   52.15619  8.66%     -    0s
     0     0   51.87500    0  119   48.00000   51.87500  8.07%     -    0s
     0     0   51.68442    0  121   48.00000   51.68442  7.68%     -    0s
     0     0   51.59257    0  122   48.00000   51.59257  7.48%     -    0s
     0     0   51.56742    0  123   48.00000   51.56742  7.43%     -    0s
     0     0   51.56742    0  123   48.00000   51.56742  7.43%     -    0s
H    0     0                      50.0000000   51.56742  3.13%     -    0s
     0     2   51.56742    0  123   50.00000   51.56742  3.13%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 50

Explored 19 nodes (1074 simplex iterations) in 0.08 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.000000000000e+01, best bound 5.000000000000e+01, gap 0.0%