Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:36 2012

Optimize a model with 451 rows, 128 columns and 902 nonzeros
Presolve removed 80 rows and 1 columns
Presolve time: 0.00s
Presolved: 371 rows, 127 columns, 793 nonzeros
Variable types: 0 continuous, 127 integer (127 binary)
Found heuristic solution: objective 41.0000000

Root relaxation: objective 5.625000e+01, 182 iterations, 0.00 seconds

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

     0     0   56.25000    0  113   41.00000   56.25000  37.2%     -    0s
     0     0   54.39583    0  122   41.00000   54.39583  32.7%     -    0s
     0     0   53.47959    0  126   41.00000   53.47959  30.4%     -    0s
H    0     0                      42.0000000   53.47959  27.3%     -    0s
     0     0   52.61692    0  127   42.00000   52.61692  25.3%     -    0s
H    0     0                      43.0000000   52.61692  22.4%     -    0s
     0     0   52.23039    0  125   43.00000   52.23039  21.5%     -    0s
     0     0   51.71227    0  126   43.00000   51.71227  20.3%     -    0s
     0     0   51.46393    0  127   43.00000   51.46393  19.7%     -    0s
     0     0   51.26472    0  124   43.00000   51.26472  19.2%     -    0s
     0     0   51.19986    0  126   43.00000   51.19986  19.1%     -    0s
     0     0   51.19986    0  125   43.00000   51.19986  19.1%     -    0s
     0     2   51.19783    0  125   43.00000   51.19783  19.1%     -    0s
H   10    10                      46.0000000   51.18926  11.3%  47.6    0s
*   21     9               5      47.0000000   51.16071  8.85%  44.8    0s

Cutting planes:
  Zero half: 98

Explored 208 nodes (7765 simplex iterations) in 0.31 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%