Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:40:52 2012

Optimize a model with 551 rows, 495 columns and 1870 nonzeros
Presolve removed 0 rows and 15 columns
Presolve time: 0.00s
Presolved: 551 rows, 480 columns, 1855 nonzeros
Variable types: 0 continuous, 480 integer (479 binary)
Found heuristic solution: objective 100.0000000

Root relaxation: objective 0.000000e+00, 273 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  198  100.00000    0.00000   100%     -    0s
H    0     0                      79.0000000    0.00000   100%     -    0s
     0     0    0.34198    0  200   79.00000    0.34198   100%     -    0s
H    0     0                      67.0000000    0.34198  99.5%     -    0s
     0     0    0.89848    0  204   67.00000    0.89848  98.7%     -    0s
H    0     0                      60.0000000    0.89848  98.5%     -    0s
     0     0    0.89866    0  203   60.00000    0.89866  98.5%     -    0s
H    0     0                      49.0000000    0.89866  98.2%     -    0s
     0     0    0.89866    0  203   49.00000    0.89866  98.2%     -    0s
     0     2    0.90039    0  203   49.00000    0.90039  98.2%     -    0s
*   64    59              34      24.0000000    1.00000  95.8%  30.8    0s
*  137   103              28      23.0000000    1.04922  95.4%  31.9    0s
*  190   127              21      22.0000000    1.91667  91.3%  36.3    0s
* 1869   498              31      21.0000000   11.52564  45.1%  29.5    2s
  3370   641   14.48023   20  205   21.00000   13.63333  35.1%  26.8    5s
* 6559   371              31      20.0000000   16.35043  18.2%  26.3    9s

Explored 7414 nodes (189760 simplex iterations) in 9.90 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.000000000000e+01, best bound 2.000000000000e+01, gap 0.0%