Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:41 2012

Optimize a model with 454 rows, 131 columns and 908 nonzeros
Presolve removed 79 rows and 0 columns
Presolve time: 0.00s
Presolved: 375 rows, 131 columns, 800 nonzeros
Variable types: 0 continuous, 131 integer (131 binary)
Found heuristic solution: objective 45.0000000

Root relaxation: objective 5.700000e+01, 186 iterations, 0.00 seconds

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

     0     0   57.00000    0  112   45.00000   57.00000  26.7%     -    0s
     0     0   55.40000    0  122   45.00000   55.40000  23.1%     -    0s
     0     0   55.02778    0  129   45.00000   55.02778  22.3%     -    0s
     0     0   54.40000    0  127   45.00000   54.40000  20.9%     -    0s
     0     0   53.46563    0  129   45.00000   53.46563  18.8%     -    0s
     0     0   53.13632    0  127   45.00000   53.13632  18.1%     -    0s
     0     0   52.97972    0  126   45.00000   52.97972  17.7%     -    0s
     0     0   52.70696    0  130   45.00000   52.70696  17.1%     -    0s
     0     0   52.62308    0  128   45.00000   52.62308  16.9%     -    0s
     0     0   52.59898    0  129   45.00000   52.59898  16.9%     -    0s
     0     0   52.59898    0  128   45.00000   52.59898  16.9%     -    0s
     0     2   52.59749    0  128   45.00000   52.59749  16.9%     -    0s
*   12    12               7      46.0000000   52.43284  14.0%  44.2    0s
H   30    20                      47.0000000   52.41791  11.5%  35.5    0s
*   94    27              15      48.0000000   51.35526  6.99%  33.9    0s

Cutting planes:
  Gomory: 2
  Zero half: 96

Explored 208 nodes (6688 simplex iterations) in 0.27 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%