Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:47:39 2012

Optimize a model with 543 rows, 503 columns and 1858 nonzeros
Presolve removed 0 rows and 21 columns
Presolve time: 0.00s
Presolved: 543 rows, 482 columns, 1837 nonzeros
Variable types: 0 continuous, 482 integer (481 binary)
Found heuristic solution: objective 99.0000000

Root relaxation: objective 0.000000e+00, 283 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  199   99.00000    0.00000   100%     -    0s
H    0     0                      80.0000000    0.00000   100%     -    0s
H    0     0                      67.0000000    0.00000   100%     -    0s
     0     0    0.26588    0  201   67.00000    0.26588   100%     -    0s
H    0     0                      47.0000000    0.26588  99.4%     -    0s
     0     0    0.73173    0  202   47.00000    0.73173  98.4%     -    0s
H    0     0                      34.0000000    0.73173  97.8%     -    0s
     0     0    0.73181    0  204   34.00000    0.73181  97.8%     -    0s
     0     0    0.73181    0  203   34.00000    0.73181  97.8%     -    0s
     0     2    0.88143    0  203   34.00000    0.88143  97.4%     -    0s
H   54    40                      19.0000000    1.00000  94.7%  26.5    0s
  3091   432   16.46512   20  202   19.00000   13.59140  28.5%  26.4    5s

Explored 4923 nodes (121972 simplex iterations) in 7.43 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.900000000000e+01, best bound 1.900000000000e+01, gap 0.0%