Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:56 2012

Optimize a model with 557 rows, 107 columns and 1114 nonzeros
Presolve removed 201 rows and 0 columns
Presolve time: 0.00s
Presolved: 356 rows, 107 columns, 886 nonzeros
Variable types: 0 continuous, 107 integer (107 binary)
Found heuristic solution: objective 26.0000000

Root relaxation: objective 3.814286e+01, 239 iterations, 0.00 seconds

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

     0     0   38.14286    0  102   26.00000   38.14286  46.7%     -    0s
H    0     0                      28.0000000   38.14286  36.2%     -    0s
     0     0   37.69650    0  103   28.00000   37.69650  34.6%     -    0s
     0     0   37.42871    0  105   28.00000   37.42871  33.7%     -    0s
H    0     0                      29.0000000   37.42871  29.1%     -    0s
     0     0   37.30705    0  102   29.00000   37.30705  28.6%     -    0s
     0     0   37.12463    0  104   29.00000   37.12463  28.0%     -    0s
     0     0   37.00257    0  107   29.00000   37.00257  27.6%     -    0s
     0     0   36.90988    0  107   29.00000   36.90988  27.3%     -    0s
     0     0   36.88469    0  107   29.00000   36.88469  27.2%     -    0s
     0     0   36.87804    0  107   29.00000   36.87804  27.2%     -    0s
     0     0   36.87804    0  106   29.00000   36.87804  27.2%     -    0s
     0     2   36.87661    0  105   29.00000   36.87661  27.2%     -    0s
*   10    10               6      30.0000000   36.87661  22.9%  42.9    0s
H 2248   247                      31.0000000   33.00000  6.45%  18.5    1s

Explored 2671 nodes (47785 simplex iterations) in 1.73 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.100000000000e+01, best bound 3.100000000000e+01, gap 0.0%