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

Optimize a model with 333 rows, 116 columns and 666 nonzeros
Presolve removed 60 rows and 1 columns
Presolve time: 0.00s
Presolved: 273 rows, 115 columns, 582 nonzeros
Variable types: 0 continuous, 115 integer (115 binary)
Found heuristic solution: objective 41.0000000

Root relaxation: objective 5.100000e+01, 139 iterations, 0.00 seconds

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

     0     0   51.00000    0   90   41.00000   51.00000  24.4%     -    0s
     0     0   49.60000    0  111   41.00000   49.60000  21.0%     -    0s
     0     0   49.21635    0  110   41.00000   49.21635  20.0%     -    0s
H    0     0                      42.0000000   49.21635  17.2%     -    0s
     0     0   48.75000    0  106   42.00000   48.75000  16.1%     -    0s
     0     0   48.59589    0  105   42.00000   48.59589  15.7%     -    0s
H    0     0                      43.0000000   48.59589  13.0%     -    0s
     0     0   48.32753    0  110   43.00000   48.32753  12.4%     -    0s
H    0     0                      44.0000000   48.32753  9.84%     -    0s
     0     0   48.30825    0  112   44.00000   48.30825  9.79%     -    0s
     0     0   48.30825    0  112   44.00000   48.30825  9.79%     -    0s
     0     2   48.28571    0  112   44.00000   48.28571  9.74%     -    0s
H    4     4                      45.0000000   48.00000  6.67%  43.5    0s
*   19     4               6      46.0000000   47.57143  3.42%  23.9    0s

Cutting planes:
  Gomory: 2
  Zero half: 45

Explored 29 nodes (1193 simplex iterations) in 0.06 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.600000000000e+01, best bound 4.600000000000e+01, gap 0.0%