Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:35 2012

Optimize a model with 410 rows, 128 columns and 820 nonzeros
Presolve removed 80 rows and 2 columns
Presolve time: 0.00s
Presolved: 330 rows, 126 columns, 702 nonzeros
Variable types: 0 continuous, 126 integer (126 binary)
Found heuristic solution: objective 45.0000000

Root relaxation: objective 5.450000e+01, 200 iterations, 0.00 seconds

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

     0     0   54.50000    0   99   45.00000   54.50000  21.1%     -    0s
     0     0   53.50000    0  120   45.00000   53.50000  18.9%     -    0s
     0     0   53.00000    0  112   45.00000   53.00000  17.8%     -    0s
H    0     0                      46.0000000   53.00000  15.2%     -    0s
     0     0   52.50000    0  119   46.00000   52.50000  14.1%     -    0s
     0     0   51.83333    0  121   46.00000   51.83333  12.7%     -    0s
     0     0   51.44444    0  121   46.00000   51.44444  11.8%     -    0s
     0     0   51.21084    0  122   46.00000   51.21084  11.3%     -    0s
     0     0   51.12060    0  121   46.00000   51.12060  11.1%     -    0s
     0     0   50.97094    0  119   46.00000   50.97094  10.8%     -    0s
     0     0   50.93750    0  120   46.00000   50.93750  10.7%     -    0s
     0     0   50.93750    0  120   46.00000   50.93750  10.7%     -    0s
H    0     0                      47.0000000   50.93750  8.38%     -    0s
H    0     0                      48.0000000   50.93750  6.12%     -    0s
     0     2   50.93750    0  119   48.00000   50.93750  6.12%     -    0s
H   63     5                      49.0000000   50.22000  2.49%  28.5    0s

Cutting planes:
  Gomory: 1
  Zero half: 73

Explored 69 nodes (2899 simplex iterations) in 0.13 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.900000000000e+01, best bound 4.900000000000e+01, gap 0.0%