Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:35 2012

Optimize a model with 423 rows, 128 columns and 846 nonzeros
Presolve removed 94 rows and 1 columns
Presolve time: 0.00s
Presolved: 329 rows, 127 columns, 714 nonzeros
Variable types: 0 continuous, 127 integer (127 binary)
Found heuristic solution: objective 44.0000000

Root relaxation: objective 5.425000e+01, 182 iterations, 0.00 seconds

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

     0     0   54.25000    0  101   44.00000   54.25000  23.3%     -    0s
     0     0   53.42857    0  109   44.00000   53.42857  21.4%     -    0s
H    0     0                      47.0000000   53.42857  13.7%     -    0s
H    0     0                      48.0000000   53.42857  11.3%     -    0s
     0     0   52.56000    0  120   48.00000   52.56000  9.50%     -    0s
     0     0   52.36145    0  125   48.00000   52.36145  9.09%     -    0s
     0     0   52.16253    0  121   48.00000   52.16253  8.67%     -    0s
     0     0   52.00552    0  123   48.00000   52.00552  8.34%     -    0s
     0     0   51.86128    0  123   48.00000   51.86128  8.04%     -    0s
     0     0   51.69380    0  122   48.00000   51.69380  7.70%     -    0s
     0     0   51.68480    0  124   48.00000   51.68480  7.68%     -    0s
     0     0   51.68480    0  123   48.00000   51.68480  7.68%     -    0s
     0     2   51.68406    0  122   48.00000   51.68406  7.68%     -    0s
*   46     8               7      49.0000000   50.80000  3.67%  27.8    0s

Cutting planes:
  Gomory: 1
  Clique: 1
  Zero half: 63

Explored 65 nodes (2300 simplex iterations) in 0.11 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.900000000000e+01, best bound 4.900000000000e+01, gap 0.0%