Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:21 2012

Optimize a model with 339 rows, 117 columns and 678 nonzeros
Presolve removed 81 rows and 6 columns
Presolve time: 0.00s
Presolved: 258 rows, 111 columns, 550 nonzeros
Variable types: 0 continuous, 111 integer (111 binary)
Found heuristic solution: objective 43.0000000

Root relaxation: objective 5.200000e+01, 154 iterations, 0.00 seconds

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

     0     0   52.00000    0   82   43.00000   52.00000  20.9%     -    0s
     0     0   50.96226    0  108   43.00000   50.96226  18.5%     -    0s
H    0     0                      45.0000000   50.96226  13.2%     -    0s
     0     0   50.22222    0  105   45.00000   50.22222  11.6%     -    0s
     0     0   49.36667    0  109   45.00000   49.36667  9.70%     -    0s
     0     0   48.97222    0  105   45.00000   48.97222  8.83%     -    0s
     0     0   48.84211    0   92   45.00000   48.84211  8.54%     -    0s
     0     0   48.72527    0  105   45.00000   48.72527  8.28%     -    0s
     0     0   48.63566    0  106   45.00000   48.63566  8.08%     -    0s
     0     0   48.51743    0  109   45.00000   48.51743  7.82%     -    0s
     0     0   48.47918    0  110   45.00000   48.47918  7.73%     -    0s
     0     0   48.47918    0  109   45.00000   48.47918  7.73%     -    0s
H    0     0                      47.0000000   48.47918  3.15%     -    0s
     0     2   48.47918    0  109   47.00000   48.47918  3.15%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 37

Explored 13 nodes (843 simplex iterations) in 0.07 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.700000000000e+01, best bound 4.700000000000e+01, gap 0.0%