user: Demonstrate the C code that generates the assembly output below:

```asm
<main>:
  endbr64
  push   %r14
  xor    %eax,%eax
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  call   <__VERIFIER_nondet_ulong@plt>
  mov    %rax,%r12
  xor    %eax,%eax
  call   <__VERIFIER_nondet_ulong@plt>
  lea    0x0(,%r12,4),%edi
  mov    %rax,%rbx
  call   <malloc@plt>
  lea    0x0(,%rbx,4),%edi
  mov    %rax,%rbp
  call   <malloc@plt>
  mov    %rbx,%rcx
  mov    %r12,%rsi
  mov    %rbp,%rdi
  mov    %rax,%rdx
  mov    %rax,%r13
  call   <is_relaxed_prefix@plt>
  test   %rax,%rax
  lea    0x1(%rbx),%rax
  jne    L114
  cmp    %r12,%rax
  jb     L177
  test   %rbx,%rbx
  je     L189
  test   %r12,%r12
  je     L189
  cmp    %rbx,%r12
  mov    %rbx,%rsi
  cmovbe %r12,%rsi
  xor    %eax,%eax
  xor    %edx,%edx
  xchg   %ax,%ax
L175:
  mov    %rax,%rcx
  sub    %rdx,%rcx
  mov    0x0(%r13,%rcx,4),%ecx
  cmp    %ecx,0x0(%rbp,%rax,4)
  je     L96
  add    $0x1,%rdx
L96:
  add    $0x1,%rax
  cmp    %rsi,%rax
  jb     L175
L93:
  cmp    %r12,%rbx
  adc    $0x0,%rdx
  xor    %edi,%edi
  cmp    $0x1,%rdx
  seta   %dil
  call   <__VERIFIER_assert@plt>
L177:
  mov    %rbp,%rdi
  call   <free@plt>
  mov    %r13,%rdi
  call   <free@plt>
  pop    %rbx
  xor    %eax,%eax
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  ret
L114:
  xor    %edi,%edi
  cmp    %r12,%rax
  setae  %dil
  call   <__VERIFIER_assert@plt>
  xor    %eax,%eax
  call   <__VERIFIER_nondet_ulong@plt>
  mov    %rax,%r14
  cmp    %rbx,%r12
  ja     L100
L62:
  test   %rbx,%rbx
  je     L177
  test   %r12,%r12
  setne  %al
  cmp    %rbx,%r12
  cmova  %rbx,%r12
  xor    %ebx,%ebx
  test   %al,%al
  jne    L120
  jmp    L177
  nopw   0x0(%rax,%rax,1)
L164:
  je     L165
  jb     L184
L78:
  add    $0x1,%rbx
  cmp    %r12,%rbx
  jae    L177
L120:
  xor    %eax,%eax
  call   <__VERIFIER_nondet_int@plt>
  mov    %eax,0x0(%rbp,%rbx,4)
  xor    %eax,%eax
  call   <__VERIFIER_nondet_int@plt>
  mov    %eax,0x0(%r13,%rbx,4)
  cmp    %rbx,%r14
  jbe    L164
  xor    %edi,%edi
  cmp    %eax,0x0(%rbp,%rbx,4)
  sete   %dil
  call   <__VERIFIER_assume@plt>
  jmp    L78
L184:
  mov    -0x4(%r13,%rbx,4),%eax
  xor    %edi,%edi
  cmp    %eax,0x0(%rbp,%rbx,4)
  sete   %dil
  call   <__VERIFIER_assert@plt>
  jmp    L78
L165:
  xor    %edi,%edi
  cmp    %eax,0x0(%rbp,%r14,4)
  setne  %dil
  call   <__VERIFIER_assume@plt>
  jmp    L78
L100:
  lea    -0x1(%r12),%r14
  jmp    L62
L189:
  xor    %edx,%edx
  jmp    L93
```

assistant: ```c
int main() {
  unsigned long pat_len = __VERIFIER_nondet_ulong(), a_len = __VERIFIER_nondet_ulong();
  int *pat = malloc(sizeof(int) * pat_len);
  int *a = malloc(sizeof(int) * a_len);
  if (is_relaxed_prefix(pat, pat_len, a, a_len)) {
    __VERIFIER_assert(pat_len <= a_len + 1);
    unsigned long different = __VERIFIER_nondet_ulong();
    if (pat_len > a_len)
      different = pat_len - 1;
    for (int i = 0; i < pat_len && i < a_len; i++) {
      pat[i] = __VERIFIER_nondet_int();
      a[i] = __VERIFIER_nondet_int();
      if (i < different)
        __VERIFIER_assume(pat[i] == a[i]);
      else if (i == different)
        __VERIFIER_assume(pat[i] != a[i]);
      else if (i > different)
        __VERIFIER_assert(pat[i] == a[i - 1]);
    }
  } else if (pat_len <= a_len + 1) {
    unsigned long differences = 0;
    for (int i = 0; i < pat_len && i < a_len; i++) {
      if (pat[i] != a[i - differences])
        ++differences;
    }
    if (pat_len > a_len)
      ++differences;
    __VERIFIER_assert(differences > 1);
  }
  free(pat);
  free(a);
  return 0;
}
```