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

Optimize a model with 337 rows, 114 columns and 674 nonzeros
Presolve removed 55 rows and 3 columns
Presolve time: 0.00s
Presolved: 282 rows, 111 columns, 590 nonzeros
Variable types: 0 continuous, 111 integer (111 binary)
Found heuristic solution: objective 43.0000000

Root relaxation: objective 5.050000e+01, 180 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   95   43.00000   50.50000  17.4%     -    0s
H    0     0                      44.0000000   50.50000  14.8%     -    0s
     0     0   50.00000    0   94   44.00000   50.00000  13.6%     -    0s
H    0     0                      45.0000000   50.00000  11.1%     -    0s
     0     0   49.30556    0  106   45.00000   49.30556  9.57%     -    0s
     0     0   48.51429    0  105   45.00000   48.51429  7.81%     -    0s
     0     0   48.25000    0   97   45.00000   48.25000  7.22%     -    0s
H    0     0                      47.0000000   48.25000  2.66%     -    0s
H    0     0                      48.0000000   48.25000  0.52%     -    0s

Cutting planes:
  Zero half: 19

Explored 0 nodes (392 simplex iterations) in 0.03 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.800000000000e+01, best bound 4.800000000000e+01, gap 0.0%