Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:26 2012

Optimize a model with 344 rows, 122 columns and 688 nonzeros
Presolve removed 60 rows and 4 columns
Presolve time: 0.00s
Presolved: 284 rows, 118 columns, 597 nonzeros
Variable types: 0 continuous, 118 integer (118 binary)
Found heuristic solution: objective 48.0000000

Root relaxation: objective 5.536364e+01, 189 iterations, 0.00 seconds

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

     0     0   55.36364    0  109   48.00000   55.36364  15.3%     -    0s
H    0     0                      52.0000000   55.36364  6.47%     -    0s
     0     0   54.00000    0  100   52.00000   54.00000  3.85%     -    0s
     0     0   53.40000    0  110   52.00000   53.40000  2.69%     -    0s
     0     0     cutoff    0        52.00000   52.99995  1.92%     -    0s

Cutting planes:
  Zero half: 51

Explored 0 nodes (343 simplex iterations) in 0.02 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.200000000000e+01, best bound 5.200000000000e+01, gap 0.0%