user: What would the C source look like for the assembly code provided here?

```asm
<main>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbx
  sub    $0x58,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,-0x38(%rbp)
  xor    %eax,%eax
  mov    %rsp,%rax
  mov    %rax,%rbx
  mov    $0x4,%edi
  call   <malloc@plt>
  mov    %rax,-0x70(%rbp)
  mov    $0x4,%edi
  call   <malloc@plt>
  mov    %rax,-0x68(%rbp)
  mov    $0x4,%edi
  call   <malloc@plt>
  mov    %rax,-0x60(%rbp)
  mov    $0x4,%edi
  call   <malloc@plt>
  mov    %rax,-0x58(%rbp)
  movl   $0x64,-0x78(%rbp)
  mov    -0x78(%rbp),%eax
  movslq %eax,%rdx
  sub    $0x1,%rdx
  mov    %rdx,-0x50(%rbp)
  movslq %eax,%rdx
  mov    %rdx,%r14
  mov    $0x0,%r15d
  movslq %eax,%rdx
  mov    %rdx,%r12
  mov    $0x0,%r13d
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    $0x10,%eax
  sub    $0x1,%rax
  add    %rdx,%rax
  mov    $0x10,%esi
  mov    $0x0,%edx
  div    %rsi
  imul   $0x10,%rax,%rax
  mov    %rax,%rcx
  and    $0xfffffffffffff000,%rcx
  mov    %rsp,%rdx
  sub    %rcx,%rdx
L26:
  cmp    %rdx,%rsp
  je     L12
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  jmp    L26
L12:
  mov    %rax,%rdx
  and    $0xfff,%edx
  sub    %rdx,%rsp
  mov    %rax,%rdx
  and    $0xfff,%edx
  test   %rdx,%rdx
  je     L27
  and    $0xfff,%eax
  sub    $0x8,%rax
  add    %rsp,%rax
  orq    $0x0,(%rax)
L27:
  mov    %rsp,%rax
  add    $0x3,%rax
  shr    $0x2,%rax
  shl    $0x2,%rax
  mov    %rax,-0x48(%rbp)
  movl   $0x64,-0x74(%rbp)
  mov    -0x74(%rbp),%eax
  cltq
  shl    $0x2,%eax
  mov    %eax,%edi
  call   <malloc@plt>
  mov    %rax,-0x40(%rbp)
  mov    -0x78(%rbp),%ecx
  mov    -0x48(%rbp),%rax
  mov    $0xffffffff,%edx
  mov    %ecx,%esi
  mov    %rax,%rdi
  call   <read_element@plt>
  mov    -0x78(%rbp),%ecx
  mov    -0x48(%rbp),%rax
  mov    $0x64,%edx
  mov    %ecx,%esi
  mov    %rax,%rdi
  call   <read_element@plt>
  mov    -0x74(%rbp),%ecx
  mov    -0x40(%rbp),%rax
  mov    $0xffffffff,%edx
  mov    %ecx,%esi
  mov    %rax,%rdi
  call   <read_element@plt>
  mov    -0x74(%rbp),%ecx
  mov    -0x40(%rbp),%rax
  mov    $0x64,%edx
  mov    %ecx,%esi
  mov    %rax,%rdi
  call   <read_element@plt>
  mov    -0x40(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  mov    -0x60(%rbp),%rax
  movl   $0x11,(%rax)
  mov    -0x60(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  mov    -0x58(%rbp),%rax
  movl   $0x11,(%rax)
  mov    -0x58(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  mov    -0x70(%rbp),%rax
  mov    %rax,%rdi
  call   <free_anything@plt>
  mov    -0x68(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  mov    $0x0,%eax
  mov    %rbx,%rsp
  mov    -0x38(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L24
  call   <__stack_chk_fail@plt>
L24:
  lea    -0x28(%rbp),%rsp
  pop    %rbx
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  pop    %rbp
  ret
```

assistant: ```c
int main() {
  int *never_allocated = malloc(sizeof(int));
  int *free_twice = malloc(sizeof(int));
  int *use_after_free = malloc(sizeof(int));
  int *never_free = malloc(sizeof(int));
  int array1_size = 100;
  int array1[array1_size];
  int array2_size = 100;
  int *array2 = malloc(array2_size * sizeof(int));
  read_element(array1, array1_size, -1);
  read_element(array1, array1_size, 100);
  read_element(array2, array2_size, -1);
  read_element(array2, array2_size, 100);
  free(array2);
  *use_after_free = 17;
  free(use_after_free);
  *never_free = 17;
  free(never_free);
  free_anything(never_allocated);
  free(free_twice);
  return 0;
}
```