Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:51:26 2012

Optimize a model with 631 rows, 113 columns and 1262 nonzeros
Presolve removed 237 rows and 0 columns
Presolve time: 0.00s
Presolved: 394 rows, 113 columns, 990 nonzeros
Variable types: 0 continuous, 113 integer (113 binary)
Found heuristic solution: objective 27.0000000

Root relaxation: objective 3.913209e+01, 288 iterations, 0.01 seconds

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

     0     0   39.13209    0  112   27.00000   39.13209  44.9%     -    0s
     0     0   38.76880    0  112   27.00000   38.76880  43.6%     -    0s
     0     0   38.53296    0  113   27.00000   38.53296  42.7%     -    0s
     0     0   38.32905    0  113   27.00000   38.32905  42.0%     -    0s
     0     0   38.04775    0  112   27.00000   38.04775  40.9%     -    0s
     0     0   37.93727    0  113   27.00000   37.93727  40.5%     -    0s
     0     0   37.83621    0  112   27.00000   37.83621  40.1%     -    0s
     0     0   37.71704    0  113   27.00000   37.71704  39.7%     -    0s
     0     0   37.68313    0  112   27.00000   37.68313  39.6%     -    0s
H    0     0                      29.0000000   37.68313  29.9%     -    0s
     0     0   37.64589    0  113   29.00000   37.64589  29.8%     -    0s
     0     0   37.64336    0  113   29.00000   37.64336  29.8%     -    0s
     0     0   37.64336    0  113   29.00000   37.64336  29.8%     -    0s
H    0     0                      30.0000000   37.64336  25.5%     -    0s
     0     2   37.63748    0  113   30.00000   37.63748  25.5%     -    0s
*   12    12               9      32.0000000   37.63325  17.6%  45.8    0s

Cutting planes:
  Zero half: 43

Explored 738 nodes (20035 simplex iterations) in 0.71 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.200000000000e+01, best bound 3.200000000000e+01, gap 0.0%