Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:29 2012

Optimize a model with 387 rows, 124 columns and 774 nonzeros
Presolve removed 74 rows and 2 columns
Presolve time: 0.00s
Presolved: 313 rows, 122 columns, 665 nonzeros
Variable types: 0 continuous, 122 integer (122 binary)
Found heuristic solution: objective 40.0000000

Root relaxation: objective 5.300000e+01, 179 iterations, 0.00 seconds

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

     0     0   53.00000    0  100   40.00000   53.00000  32.5%     -    0s
     0     0   51.50000    0   95   40.00000   51.50000  28.7%     -    0s
H    0     0                      43.0000000   51.50000  19.8%     -    0s
     0     0   51.21053    0  118   43.00000   51.21053  19.1%     -    0s
     0     0   50.81250    0  118   43.00000   50.81250  18.2%     -    0s
H    0     0                      45.0000000   50.81250  12.9%     -    0s
     0     0   50.40647    0  118   45.00000   50.40647  12.0%     -    0s
     0     0   50.17647    0  114   45.00000   50.17647  11.5%     -    0s
H    0     0                      47.0000000   50.17647  6.76%     -    0s
     0     0   50.10000    0  120   47.00000   50.10000  6.60%     -    0s
     0     0   49.99529    0  120   47.00000   49.99529  6.37%     -    0s
     0     0   49.96375    0  122   47.00000   49.96375  6.31%     -    0s
     0     0   49.96375    0  119   47.00000   49.96375  6.31%     -    0s
     0     2   49.96375    0  118   47.00000   49.96375  6.31%     -    0s

Cutting planes:
  Gomory: 2
  Zero half: 82

Explored 61 nodes (2472 simplex iterations) in 0.11 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.700000000000e+01, best bound 4.700000000000e+01, gap 0.0%