Gurobi 5.0.1 (linux64) logging started Sun Nov 18 00:47:22 2012

Optimize a model with 277 rows, 191 columns and 881 nonzeros
Presolve time: 0.00s
Presolved: 277 rows, 191 columns, 881 nonzeros
Variable types: 0 continuous, 191 integer (191 binary)
Found heuristic solution: objective 62.0000000

Root relaxation: objective 0.000000e+00, 77 iterations, 0.00 seconds

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

     0     0    0.00000    0   53   62.00000    0.00000   100%     -    0s
H    0     0                      61.0000000    0.00000   100%     -    0s
H    0     0                      51.0000000    0.00000   100%     -    0s
H    0     0                      46.0000000    0.00000   100%     -    0s
     0     0    0.66618    0   55   46.00000    0.66618  98.6%     -    0s
     0     0    0.75569    0   56   46.00000    0.75569  98.4%     -    0s
     0     0    0.75569    0   56   46.00000    0.75569  98.4%     -    0s
     0     0    0.75569    0   56   46.00000    0.75569  98.4%     -    0s
     0     2    0.82821    0   56   46.00000    0.82821  98.2%     -    0s
*   39    37              23      44.0000000    2.92857  93.3%  25.5    0s
*   70    57              18      39.0000000    3.03048  92.2%  23.9    0s
*   74    54              18      38.0000000    3.03048  92.0%  23.2    0s
*  209   134              18      37.0000000    9.47692  74.4%  24.0    0s
*  255   167              21      36.0000000    9.50000  73.6%  23.8    0s
*  313   159              15      35.0000000    9.53663  72.8%  23.4    0s
*  318   150              16      34.0000000    9.53663  72.0%  23.2    0s
H  517   179                      31.0000000   14.38958  53.6%  21.8    0s

Explored 7396 nodes (144639 simplex iterations) in 4.39 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%