Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:17 2012

Optimize a model with 314 rows, 113 columns and 628 nonzeros
Presolve removed 51 rows and 2 columns
Presolve time: 0.00s
Presolved: 263 rows, 111 columns, 555 nonzeros
Variable types: 0 continuous, 111 integer (111 binary)
Found heuristic solution: objective 42.0000000

Root relaxation: objective 5.050000e+01, 178 iterations, 0.00 seconds

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

     0     0   50.50000    0   89   42.00000   50.50000  20.2%     -    0s
     0     0   50.00000    0  107   42.00000   50.00000  19.0%     -    0s
H    0     0                      47.0000000   50.00000  6.38%     -    0s
     0     0   49.62500    0   98   47.00000   49.62500  5.59%     -    0s
     0     0   49.09091    0  108   47.00000   49.09091  4.45%     -    0s
     0     0   48.97059    0  106   47.00000   48.97059  4.19%     -    0s
     0     0   48.91724    0  108   47.00000   48.91724  4.08%     -    0s
     0     0   48.76923    0  104   47.00000   48.76923  3.76%     -    0s
     0     0   48.74497    0  108   47.00000   48.74497  3.71%     -    0s
     0     0   48.74227    0  105   47.00000   48.74227  3.71%     -    0s
     0     0   48.64676    0  107   47.00000   48.64676  3.50%     -    0s
     0     0   48.63924    0  106   47.00000   48.63924  3.49%     -    0s
     0     0   48.63636    0  107   47.00000   48.63636  3.48%     -    0s
     0     0   48.63636    0  106   47.00000   48.63636  3.48%     -    0s
     0     2   48.63636    0  106   47.00000   48.63636  3.48%     -    0s

Cutting planes:
  Zero half: 41

Explored 15 nodes (962 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%