GLPK Integer Optimizer, v4.63
    821 rows, 718 columns, 3489 non-zeros
    101 integer variables, all of which are binary
    Preprocessing...
    87 constraint coefficient(s) were reduced
    655 rows, 572 columns, 2658 non-zeros
    90 integer variables, all of which are binary
    Scaling...
     A: min|aij| =  1.000e+00  max|aij| =  1.000e+08  ratio =  1.000e+08
    GM: min|aij| =  3.275e-02  max|aij| =  3.054e+01  ratio =  9.325e+02
    EQ: min|aij| =  1.072e-03  max|aij| =  1.000e+00  ratio =  9.325e+02
    2N: min|aij| =  8.774e-04  max|aij| =  1.490e+00  ratio =  1.698e+03
    Constructing initial basis...
    Size of triangular part is 655
    Solving LP relaxation...
    GLPK Simplex Optimizer, v4.63
    655 rows, 572 columns, 2658 non-zeros
          0: obj =   9.000000000e+01 inf =   4.765e+05 (166)
        131: obj =   8.081016018e+01 inf =   3.553e-15 (0)
    *   149: obj =   8.325693700e+01 inf =   9.167e-13 (0)
    OPTIMAL LP SOLUTION FOUND
    Integer optimization begins...
    +   149: mip =     not found yet <=              +inf        (1; 0)
    +   501: >>>>>   6.899999641e+01 <=   8.300000000e+01  20.3% (85; 1)
    Warning: numerical instability (dual simplex, phase II)
    +   949: >>>>>   7.799999641e+01 <=   8.300000000e+01   6.4% (122; 124)
    Warning: numerical instability (dual simplex, phase II)
    Warning: numerical instability (dual simplex, phase II)
    +  1315: >>>>>   8.199999641e+01 <=   8.300000000e+01   1.2% (131; 247)
    +  1570: >>>>>   8.299999641e+01 <=   8.300000000e+01 < 0.1% (25; 503)
    +  1570: mip =   8.299999641e+01 <=     tree is empty   0.0% (0; 565)
    INTEGER OPTIMAL SOLUTION FOUND
    Time used:   0.5 secs
    Memory used: 2.1 Mb (2250332 bytes)