Re: [Bug-glpk] Assertion at glpipm.c; line 571

[Andrew Makhorin]

Barry,

I run your instance with glpsol 4.9 and no bugs were detected:

------------------------------------------------------------------------
lpx_read_mps: reading problem data from `assert.mps'...
lpx_read_mps: problem name not specified
lpx_read_mps: 4212 rows, 6739 columns, 2872 non-zeros
lpx_read_mps: 17141 cards were read
lpx_interior: original LP problem has 4212 rows and 6739 columns
lpx_interior: transformed LP problem has 702 rows and 1402 columns
lpx_interior: A has 2662 non-zeros
lpx_interior: S has 1682 non-zeros (upper triangle)
lpx_interior: minimal degree ordering...
lpx_interior: computing Cholesky factorization...
lpx_interior: U has 1682 non-zeros
lpx_interior: guessing initial point...
Optimization begins...
  0: obj =   0.000000000e+00; rpi =  2.2e+01; rdi =  8.4e+01; gap =  0.0e+00
  1: obj =   0.000000000e+00; rpi =  3.0e+00; rdi =  8.4e+00; gap =  2.3e+03
  2: obj =   0.000000000e+00; rpi =  3.0e-01; rdi =  8.4e-01; gap =  5.8e+02
  3: obj =   0.000000000e+00; rpi =  3.1e-02; rdi =  8.4e-02; gap =  7.7e+01
  4: obj =   0.000000000e+00; rpi =  3.6e-03; rdi =  8.4e-03; gap =  8.8e+00
  5: obj =   0.000000000e+00; rpi =  7.7e-04; rdi =  1.1e-03; gap =  1.1e+00
  6: obj =   0.000000000e+00; rpi =  1.6e-04; rdi =  2.3e-04; gap =  1.9e-01
  7: obj =   0.000000000e+00; rpi =  3.2e-05; rdi =  6.0e-05; gap =  4.8e-02
  8: obj =   0.000000000e+00; rpi =  5.1e-06; rdi =  8.1e-06; gap =  7.4e-03
  9: obj =   0.000000000e+00; rpi =  1.5e-06; rdi =  5.1e-06; gap =  4.9e-03
 10: obj =   0.000000000e+00; rpi =  1.5e-07; rdi =  6.9e-07; gap =  1.5e-03
 11: obj =   0.000000000e+00; rpi =  1.5e-08; rdi =  7.1e-08; gap =  1.8e-04
 12: obj =   0.000000000e+00; rpi =  1.5e-09; rdi =  7.2e-09; gap =  1.8e-05
 13: obj =   0.000000000e+00; rpi =  1.5e-10; rdi =  7.2e-10; gap =  1.8e-06
 14: obj =   0.000000000e+00; rpi =  1.5e-11; rdi =  7.2e-11; gap =  1.8e-07
 15: obj =   0.000000000e+00; rpi =  1.5e-12; rdi =  7.2e-12; gap =  1.8e-08
 16: obj =   0.000000000e+00; rpi =  1.5e-13; rdi =  7.2e-13; gap =  1.8e-09
OPTIMAL SOLUTION FOUND
Time used:   0.0 secs
Memory used: 2.0M (2086640 bytes)
------------------------------------------------------------------------

Are you using a precompiled version of the package? If so, please
point out the source.

Andrew Makhorin