Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:18 2012

Optimize a model with 320 rows, 114 columns and 640 nonzeros
Presolve removed 76 rows and 9 columns
Presolve time: 0.00s
Presolved: 244 rows, 105 columns, 507 nonzeros
Variable types: 0 continuous, 105 integer (105 binary)
Found heuristic solution: objective 47.0000000

Root relaxation: objective 5.100000e+01, 136 iterations, 0.00 seconds

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

     0     0   51.00000    0   76   47.00000   51.00000  8.51%     -    0s
     0     0   49.44444    0   86   47.00000   49.44444  5.20%     -    0s
     0     0   48.83333    0   94   47.00000   48.83333  3.90%     -    0s
H    0     0                      48.0000000   48.83333  1.74%     -    0s

Cutting planes:
  Gomory: 2
  Zero half: 11

Explored 0 nodes (326 simplex iterations) in 0.01 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%