Gurobi 5.0.1 (linux64) logging started Sun Nov 18 09:03:08 2012

Optimize a model with 567 rows, 523 columns and 1938 nonzeros
Presolve removed 0 rows and 21 columns
Presolve time: 0.00s
Presolved: 567 rows, 502 columns, 1917 nonzeros
Variable types: 0 continuous, 502 integer (501 binary)
Found heuristic solution: objective 110.0000000

Root relaxation: objective 0.000000e+00, 271 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  205  110.00000    0.00000   100%     -    0s
H    0     0                      51.0000000    0.00000   100%     -    0s
     0     0    0.42075    0  206   51.00000    0.42075  99.2%     -    0s
H    0     0                      43.0000000    0.42075  99.0%     -    0s
     0     0    0.83086    0  210   43.00000    0.83086  98.1%     -    0s
H    0     0                      37.0000000    0.83086  97.8%     -    0s
     0     0    0.83195    0  212   37.00000    0.83195  97.8%     -    0s
     0     0    0.83195    0  212   37.00000    0.83195  97.8%     -    0s
     0     2    0.84016    0  212   37.00000    0.84016  97.7%     -    0s
H   27    27                      32.0000000    2.00798  93.7%  49.0    0s
H   48    46                      23.0000000    2.00798  91.3%  37.6    0s
H   48    46                      22.0000000    2.00798  90.9%  37.6    0s
*  661   245              42      21.0000000    9.64516  54.1%  36.7    1s
  2720   658   17.67213   25  217   21.00000   12.43182  40.8%  28.3    5s
  5958   851     cutoff   27        21.00000   15.46154  26.4%  25.3   10s
  9434   546   19.91781   29  182   21.00000   17.06623  18.7%  24.0   15s

Explored 11154 nodes (259994 simplex iterations) in 17.18 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.100000000000e+01, best bound 2.100000000000e+01, gap 0.0%