Weird segmentation fault error

[Sumeet]

I'm getting a weird segmentation fault error.

The following program works fine:

//====================================================================
#include <stdio.h>
#include <gmp.h>

void main() {

    mpf_set_default_prec(100);
    mpf_t s1,s2,s3,s4,a1,a2,a3,a4,a5,s,days;
    mpz_t ans;

    int i;

    mpf_inits(s1,s2,s3,s4,a1,a2,a3,a4,a5,s,days);
    mpz_init(ans);

    //for (i = 0; i < 20; i++) {
    i = 16;
    mpf_sqrt_ui(a1,2);     //sqrt(2)
    mpf_mul_ui(a2,a1,2);   //2sqrt(2)
    mpf_add_ui(a3,a2,3);   //3 + 2sqrt(2)
    mpf_ui_sub(a4,3,a2);   //3 - 2sqrt(2)
    mpf_mul_ui(a5,a1,4);   //4*sqrt(2)

    mpf_pow_ui(s1,a3,i);
    mpf_pow_ui(s2,a4,i);
    mpf_sub(s3,s1,s2);
    mpf_div(s4,s3,a5);
    mpf_pow_ui(s,s4,2);

    mpf_add_ui(s,s,1);
    mpz_set_f(ans,s);

    mpf_div_ui(days,s,86400);

    mpz_out_str(stdout, 10, ans);
    printf("\n");
    mpf_out_str(stdout,10,30,days);
    printf("\n");
   //}


    mpf_clears(s1,s2,s3,s4,a1,a2,a3,a4,a5,s,days);
    mpz_clear(ans);
}

//===============================================================

However, when I add just one more mpz_t variable, I get a segmentation
fault:

//===============================================================
#include <stdio.h>
#include <gmp.h>

void main() {

    mpf_set_default_prec(100);
    mpf_t s1,s2,s3,s4,a1,a2,a3,a4,a5,s,days;
    mpz_t ans,ans1;    // <<====== ONLY ADDED ans1

    int i;

    mpf_inits(s1,s2,s3,s4,a1,a2,a3,a4,a5,s,days);
    mpz_init(ans);

    //for (i = 0; i < 20; i++) {
    i = 16;
    mpf_sqrt_ui(a1,2);     //sqrt(2)
    mpf_mul_ui(a2,a1,2);   //2sqrt(2)
    mpf_add_ui(a3,a2,3);   //3 + 2sqrt(2)
    mpf_ui_sub(a4,3,a2);   //3 - 2sqrt(2)
    mpf_mul_ui(a5,a1,4);   //4*sqrt(2)

    mpf_pow_ui(s1,a3,i);
    mpf_pow_ui(s2,a4,i);
    mpf_sub(s3,s1,s2);
    mpf_div(s4,s3,a5);
    mpf_pow_ui(s,s4,2);

    mpf_add_ui(s,s,1);
    mpz_set_f(ans,s);

    mpf_div_ui(days,s,86400);

    mpz_out_str(stdout, 10, ans);
    printf("\n");
    mpf_out_str(stdout,10,30,days);
    printf("\n");
   //}


    mpf_clears(s1,s2,s3,s4,a1,a2,a3,a4,a5,s,days);
    mpz_clear(ans);
}

//===============================================================

I tried clearing the previous variables before declaring ans1 (since I
thought the error may be due to low memory), but that didn't help.

Could somebody point out the reason for the segfault error?

Thanks in advance,
Sumeet.