Gurobi 5.0.1 (linux64) logging started Tue Nov 20 06:50:24 2012

Optimize a model with 1072 rows, 146 columns and 2144 nonzeros
Presolve removed 416 rows and 0 columns
Presolve time: 0.01s
Presolved: 656 rows, 146 columns, 1702 nonzeros
Variable types: 0 continuous, 146 integer (146 binary)
Found heuristic solution: objective 31.0000000

Root relaxation: objective 4.785784e+01, 442 iterations, 0.01 seconds

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

     0     0   47.85784    0  145   31.00000   47.85784  54.4%     -    0s
     0     0   47.38991    0  143   31.00000   47.38991  52.9%     -    0s
     0     0   47.19438    0  145   31.00000   47.19438  52.2%     -    0s
     0     0   46.98114    0  146   31.00000   46.98114  51.6%     -    0s
     0     0   46.74873    0  145   31.00000   46.74873  50.8%     -    0s
H    0     0                      32.0000000   46.74873  46.1%     -    0s
     0     0   46.59437    0  144   32.00000   46.59437  45.6%     -    0s
     0     0   46.47347    0  144   32.00000   46.47347  45.2%     -    0s
     0     0   46.36439    0  144   32.00000   46.36439  44.9%     -    0s
H    0     0                      33.0000000   46.36439  40.5%     -    0s
     0     0   46.24306    0  145   33.00000   46.24306  40.1%     -    0s
     0     0   46.13852    0  144   33.00000   46.13852  39.8%     -    0s
     0     0   46.06411    0  145   33.00000   46.06411  39.6%     -    0s
     0     0   45.94065    0  145   33.00000   45.94065  39.2%     -    0s
     0     0   45.85213    0  145   33.00000   45.85213  38.9%     -    0s
     0     0   45.78978    0  144   33.00000   45.78978  38.8%     -    0s
     0     0   45.77602    0  145   33.00000   45.77602  38.7%     -    0s
     0     0   45.77028    0  145   33.00000   45.77028  38.7%     -    0s
     0     0   45.77028    0  145   33.00000   45.77028  38.7%     -    0s
     0     2   45.76479    0  145   33.00000   45.76479  38.7%     -    0s
*   44    26              13      34.0000000   45.49089  33.8%  54.2    0s
*   89    49              14      35.0000000   44.91197  28.3%  57.3    0s
   615   271   42.75510   14  128   35.00000   42.75510  22.2%  47.4    5s
  2455   980   36.14815   42   94   35.00000   41.05000  17.3%  43.2   10s
  5527  1996   36.18750   37   91   35.00000   39.64013  13.3%  36.2   15s
H 7844  1940                      36.0000000   39.09375  8.59%  33.6   18s
  8831  1818     cutoff   26        36.00000   38.74110  7.61%  33.2   20s

Cutting planes:
  Gomory: 9
  Clique: 2
  Zero half: 37

Explored 12161 nodes (372979 simplex iterations) in 23.22 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.600000000000e+01, best bound 3.600000000000e+01, gap 0.0%