Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:36 2012

Optimize a model with 417 rows, 129 columns and 834 nonzeros
Presolve removed 106 rows and 8 columns
Presolve time: 0.00s
Presolved: 311 rows, 121 columns, 667 nonzeros
Variable types: 0 continuous, 121 integer (121 binary)
Found heuristic solution: objective 46.0000000

Root relaxation: objective 5.607692e+01, 211 iterations, 0.00 seconds

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

     0     0   56.07692    0  115   46.00000   56.07692  21.9%     -    0s
H    0     0                      49.0000000   56.07692  14.4%     -    0s
     0     0   55.13281    0  119   49.00000   55.13281  12.5%     -    0s
     0     0   54.71728    0  121   49.00000   54.71728  11.7%     -    0s
     0     0   54.52174    0  116   49.00000   54.52174  11.3%     -    0s
     0     0   54.34091    0  117   49.00000   54.34091  10.9%     -    0s
     0     0   54.16906    0  119   49.00000   54.16906  10.5%     -    0s
     0     0   54.02222    0  115   49.00000   54.02222  10.2%     -    0s
     0     0   53.91288    0  119   49.00000   53.91288  10.0%     -    0s
     0     0   53.83810    0  120   49.00000   53.83810  9.87%     -    0s
     0     0   53.82927    0  120   49.00000   53.82927  9.86%     -    0s
     0     0   53.82927    0  120   49.00000   53.82927  9.86%     -    0s
H    0     0                      50.0000000   53.82927  7.66%     -    0s
H    0     0                      51.0000000   53.82927  5.55%     -    0s
     0     2   53.82927    0  120   51.00000   53.82927  5.55%     -    0s
*   23     4               3      52.0000000   53.29091  2.48%  29.8    0s

Cutting planes:
  Zero half: 39

Explored 28 nodes (1372 simplex iterations) in 0.10 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%