Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:16 2012

Optimize a model with 290 rows, 112 columns and 580 nonzeros
Presolve removed 57 rows and 8 columns
Presolve time: 0.00s
Presolved: 233 rows, 104 columns, 491 nonzeros
Variable types: 0 continuous, 104 integer (104 binary)
Found heuristic solution: objective 44.0000000

Root relaxation: objective 5.000000e+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   50.00000    0   74   44.00000   50.00000  13.6%     -    0s
     0     0   49.50000    0   96   44.00000   49.50000  12.5%     -    0s
     0     0   49.44000    0  103   44.00000   49.44000  12.4%     -    0s
H    0     0                      45.0000000   49.44000  9.87%     -    0s
     0     0   48.80000    0   97   45.00000   48.80000  8.44%     -    0s
     0     0   48.53279    0  100   45.00000   48.53279  7.85%     -    0s
     0     0   48.41176    0  103   45.00000   48.41176  7.58%     -    0s
     0     0   48.37143    0  100   45.00000   48.37143  7.49%     -    0s
     0     0   48.33333    0  100   45.00000   48.33333  7.41%     -    0s
H    0     0                      46.0000000   48.33333  5.07%     -    0s
     0     0   48.33333    0  101   46.00000   48.33333  5.07%     -    0s
     0     0   48.33333    0   99   46.00000   48.33333  5.07%     -    0s
     0     2   48.33333    0   95   46.00000   48.33333  5.07%     -    0s
*   18     4              10      47.0000000   48.00000  2.13%  16.8    0s

Cutting planes:
  Zero half: 23

Explored 22 nodes (889 simplex iterations) in 0.05 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%