Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:16 2012

Optimize a model with 308 rows, 112 columns and 616 nonzeros
Presolve removed 56 rows and 4 columns
Presolve time: 0.00s
Presolved: 252 rows, 108 columns, 529 nonzeros
Variable types: 0 continuous, 108 integer (108 binary)
Found heuristic solution: objective 39.0000000

Root relaxation: objective 5.000000e+01, 154 iterations, 0.00 seconds

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

     0     0   50.00000    0   82   39.00000   50.00000  28.2%     -    0s
H    0     0                      43.0000000   50.00000  16.3%     -    0s
     0     0   49.00000    0   82   43.00000   49.00000  14.0%     -    0s
     0     0   48.83000    0  107   43.00000   48.83000  13.6%     -    0s
     0     0   48.23469    0  107   43.00000   48.23469  12.2%     -    0s
     0     0   47.27778    0  104   43.00000   47.27778  9.95%     -    0s
     0     0   47.00000    0  103   43.00000   47.00000  9.30%     -    0s
     0     0   47.00000    0  105   43.00000   47.00000  9.30%     -    0s
     0     0   47.00000    0   97   43.00000   47.00000  9.30%     -    0s
     0     2   47.00000    0   96   43.00000   47.00000  9.30%     -    0s
H    7     7                      44.0000000   47.00000  6.82%  38.0    0s
*   19     6               9      45.0000000   47.00000  4.44%  20.6    0s

Cutting planes:
  Gomory: 1
  Zero half: 50

Explored 48 nodes (1685 simplex iterations) in 0.07 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.500000000000e+01, best bound 4.500000000000e+01, gap 0.0%