Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:26:06 2012

Optimize a model with 575 rows, 516 columns and 1951 nonzeros
Presolve removed 0 rows and 16 columns
Presolve time: 0.00s
Presolved: 575 rows, 500 columns, 1935 nonzeros
Variable types: 0 continuous, 500 integer (499 binary)
Found heuristic solution: objective 103.0000000

Root relaxation: objective 0.000000e+00, 270 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  208  103.00000    0.00000   100%     -    0s
H    0     0                      71.0000000    0.00000   100%     -    0s
H    0     0                      68.0000000    0.00000   100%     -    0s
     0     0    0.42250    0  210   68.00000    0.42250  99.4%     -    0s
H    0     0                      61.0000000    0.42250  99.3%     -    0s
     0     0    1.07007    0  212   61.00000    1.07007  98.2%     -    0s
H    0     0                      43.0000000    1.07007  97.5%     -    0s
     0     0    1.22736    0  212   43.00000    1.22736  97.1%     -    0s
     0     0    1.22850    0  215   43.00000    1.22850  97.1%     -    0s
     0     0    1.22850    0  215   43.00000    1.22850  97.1%     -    0s
     0     2    1.23001    0  214   43.00000    1.23001  97.1%     -    0s
*   47    44              26      27.0000000    2.91718  89.2%  36.8    0s
H   81    53                      25.0000000    2.96302  88.1%  32.7    0s
*  106    59              12      24.0000000    6.54237  72.7%  34.5    0s
H  520   161                      23.0000000   12.53333  45.5%  34.1    1s

Cutting planes:
  Gomory: 4
  Mod-K: 1

Explored 1501 nodes (49121 simplex iterations) in 2.69 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.300000000000e+01, best bound 2.300000000000e+01, gap 0.0%