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

Optimize a model with 312 rows, 106 columns and 624 nonzeros
Presolve removed 81 rows and 6 columns
Presolve time: 0.00s
Presolved: 231 rows, 100 columns, 493 nonzeros
Variable types: 0 continuous, 100 integer (100 binary)
Found heuristic solution: objective 37.0000000

Root relaxation: objective 4.650000e+01, 131 iterations, 0.00 seconds

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

     0     0   46.50000    0   79   37.00000   46.50000  25.7%     -    0s
H    0     0                      38.0000000   46.50000  22.4%     -    0s
     0     0   45.66667    0   97   38.00000   45.66667  20.2%     -    0s
     0     0   45.31250    0   98   38.00000   45.31250  19.2%     -    0s
     0     0   44.85000    0   97   38.00000   44.85000  18.0%     -    0s
H    0     0                      41.0000000   44.85000  9.39%     -    0s
H    0     0                      42.0000000   44.85000  6.79%     -    0s
     0     0   44.34483    0   98   42.00000   44.34483  5.58%     -    0s
     0     0   44.25000    0   97   42.00000   44.25000  5.36%     -    0s
     0     0   43.73913    0   97   42.00000   43.73913  4.14%     -    0s
     0     0   43.54545    0   91   42.00000   43.54545  3.68%     -    0s
     0     0   43.48837    0   94   42.00000   43.48837  3.54%     -    0s
     0     0   43.46667    0   92   42.00000   43.46667  3.49%     -    0s
     0     0   43.46667    0   92   42.00000   43.46667  3.49%     -    0s
     0     0   43.46667    0   85   42.00000   43.46667  3.49%     -    0s
     0     2   43.46667    0   84   42.00000   43.46667  3.49%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 28

Explored 16 nodes (897 simplex iterations) in 0.06 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.200000000000e+01, best bound 4.200000000000e+01, gap 0.0%