I'm trying to implement a heuristic for a MIP and need to get some informations about the problem and use the function glp_simplex several times.
Unfortunately when I call glp_simplex after call glp_get_mat_col I get a memory curruption erro.
Below I paste part of the erro get when I run the attached files of a minimal file.
$ ./test exemp01.mps
Reading problem data from `exemp01.mps'...
Problem: exemp03
Objective: z
3 rows, 2 columns, 6 non-zeros
2 integer variables, none of which are binary
25 records were read
GLPK Simplex Optimizer, v4.47
3 rows, 2 columns, 6 non-zeros
* 0: obj = 0.000000000e+00 infeas = 0.000e+00 (0)
* 2: obj = -1.055555556e+02 infeas = 0.000e+00 (0)
OPTIMAL SOLUTION FOUND
GLPK Simplex Optimizer, v4.47
3 rows, 2 columns, 6 non-zeros
*** glibc detected *** ./test: malloc(): memory corruption: 0x0000000000ac9f10 ***
======= Backtrace: =========
/lib/x86_64-linux-gnu/libc.so.6(+0x79d7a)[0x7fc52edfcd7a]
/lib/x86_64-linux-gnu/libc.so.6(__libc_malloc+0x6e)[0x7fc52edff31e]
/usr/local/lib/libglpk.so.0(glp_malloc+0x8d)[0x7fc52f14592d]
/usr/local/lib/libglpk.so.0(+0x948e8)[0x7fc52f1ab8e8]
/usr/local/lib/libglpk.so.0(glp_simplex+0x75b)[0x7fc52f123d7b]
./test[0x400892]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xff)[0x7fc52eda1eff]
./test[0x4006a9]
Thanks,
Raniere Gaia Costa da Silva
test.zip