Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:30 2012

Optimize a model with 388 rows, 125 columns and 776 nonzeros
Presolve removed 70 rows and 0 columns
Presolve time: 0.00s
Presolved: 318 rows, 125 columns, 680 nonzeros
Variable types: 0 continuous, 125 integer (125 binary)
Found heuristic solution: objective 43.0000000

Root relaxation: objective 5.550000e+01, 206 iterations, 0.00 seconds

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

     0     0   55.50000    0  107   43.00000   55.50000  29.1%     -    0s
     0     0   53.71429    0  120   43.00000   53.71429  24.9%     -    0s
H    0     0                      46.0000000   53.71429  16.8%     -    0s
     0     0   52.96429    0  124   46.00000   52.96429  15.1%     -    0s
     0     0   52.16964    0  124   46.00000   52.16964  13.4%     -    0s
     0     0   51.82288    0  125   46.00000   51.82288  12.7%     -    0s
     0     0   51.68961    0  125   46.00000   51.68961  12.4%     -    0s
     0     0   51.59730    0  124   46.00000   51.59730  12.2%     -    0s
     0     0   51.52119    0  124   46.00000   51.52119  12.0%     -    0s
     0     0   51.49083    0  125   46.00000   51.49083  11.9%     -    0s
     0     0   51.49083    0  125   46.00000   51.49083  11.9%     -    0s
     0     2   51.48763    0  124   46.00000   51.48763  11.9%     -    0s
H   41    12                      47.0000000   51.17949  8.89%  29.5    0s
H   48    10                      48.0000000   50.97712  6.20%  31.0    0s

Cutting planes:
  Gomory: 2
  Zero half: 79

Explored 101 nodes (3626 simplex iterations) in 0.16 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%