Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:25 2012

Optimize a model with 381 rows, 122 columns and 762 nonzeros
Presolve removed 115 rows and 10 columns
Presolve time: 0.00s
Presolved: 266 rows, 112 columns, 578 nonzeros
Variable types: 0 continuous, 112 integer (112 binary)
Found heuristic solution: objective 43.0000000

Root relaxation: objective 5.300000e+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   53.00000    0   88   43.00000   53.00000  23.3%     -    0s
     0     0   51.71429    0  109   43.00000   51.71429  20.3%     -    0s
H    0     0                      46.0000000   51.71429  12.4%     -    0s
     0     0   51.21053    0  106   46.00000   51.21053  11.3%     -    0s
     0     0   50.90244    0  108   46.00000   50.90244  10.7%     -    0s
     0     0   50.53571    0  108   46.00000   50.53571  9.86%     -    0s
H    0     0                      47.0000000   50.53571  7.52%     -    0s
H    0     0                      48.0000000   50.53571  5.28%     -    0s
     0     0   50.26627    0  110   48.00000   50.26627  4.72%     -    0s
     0     0   50.05703    0  109   48.00000   50.05703  4.29%     -    0s
     0     0   50.05682    0  110   48.00000   50.05682  4.29%     -    0s
     0     0   50.05682    0  109   48.00000   50.05682  4.29%     -    0s
     0     2   50.02778    0  109   48.00000   50.02778  4.22%     -    0s

Cutting planes:
  Zero half: 36

Explored 22 nodes (1131 simplex iterations) in 0.06 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.800000000000e+01, best bound 4.800000000000e+01, gap 0.0%