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Hey,

I am trying to run the Concorde on a TSP generated from a distance matrix. Here is my Code

data_4 = matrix(sample.int(15, size = 9*100, replace = TRUE), nrow = num_rows, ncol = num_cols)
data_4[data_4<floor(mean(data_4))] = 1
data_4[data_4>=floor(mean(data_4))] = 2

atsp <- ATSP(data_4)
tsp <- reformulate_ATSP_as_TSP(atsp)
o2 <- solve_TSP(tsp, method = "concorde",rep=10)

When I run the above code, I get the following error

OVERFLOW in CCbigguy_addmult (4)
BIGGUY errors are fatal
FATAL ERROR - received signal SIGABRT (6/6)
sleeping 1 more hours to permit debugger access

Can anyone tell me that what am I doing wrong?

I am running concorde in WSL2 in Windows 10, Debian, LInux v

master@Dell:~$ uname -s
Linux
master@Dell:~$ uname -r
4.19.128-microsoft-standard 

I installed concorde according to the README.
I can run concorde fine for most instances, but got a FATAL ERROR: SIGSEGV (11/11) when running the instance 1000.txt.tsp
1000.txt

i debugged it with gdb and found that in linkern.c, at line 1862 i ran into the error.

static void find_close_four (graph *G, distobj *D, CClk_flipper *F, int *t1,
        int *t2, int *t3, int *t4, int *t5, int *t6, int *t7, int *t8)
{
...
for (k = 0; k < RAND_TRYS; k++) tdist[k] = BIGINT;
    tdist[RAND_TRYS] = -BIGINT;
    for (i = 0; i < count; i++) {
        try1 = CCutil_lprand (G->rstate) % G->ncount;
        trydist = Edgelen (try1, s1, D);                                        // if trydist > BIGINT for most instances, than the faulty state is entered
        if (trydist < tdist[0]) {
            for (k = 0; tdist[k + 1] > trydist; k++) {
                tdist[k] = tdist[k + 1];                       //  line 1862: SIGSEG comes from here
                trials[k] = trials[k + 1];
            }
            tdist[k] = trydist;
            trials[k] = try1;
        }
    }

The problem lies with trydist, when it never is set to some int smaller than BIGINT (=2000000000 ). This will result in the loop not exiting, k becoming increased and set to 7. Then an Array out of Bounds Error (in C: Segmentation fault) happens.

I can change my input (I am using a big M constant, so there is some room...) but others might not be so lucky.