Output from following commands:

  sudo blkid
  swapon -s
  printf "x\np\n" | sudo fdisk /dev/mmcblk0
  ls -l /run/systemd/generator/

  cat /etc/fstab
  cat /etc/crypttab

--

Welcome to Ubuntu Xenial Xerus (development branch) (GNU/Linux 4.4.0-17-generic x86_64)

$ sudo blkid
/dev/mmcblk0: PTUUID="ed15471e-2ed3-4d17-82f0-2b21b0922606" PTTYPE="gpt"
/dev/mmcblk0p1: UUID="8F05-DBA1" TYPE="vfat" PARTLABEL="EFI System Partition" PARTUUID="3f71d0e0-4bd1-4c17-9828-63a992fc1727"
/dev/mmcblk0p2: UUID="4fb05929-3546-4b7c-b4f0-34c4a721c3c3" TYPE="ext4" PARTUUID="ecd9e622-8db1-45a1-9b7e-0ac5d93a9a96"
/dev/mmcblk0p3: UUID="5d1798c3-4e4a-4c3c-842e-e929fbeceb85" TYPE="swap" PARTUUID="0df8044d-7755-47fd-8a80-be2bbc7c87ef"

$ swapon -s
Filename                                Type            Size    Used    Priority
/dev/mmcblk0p3                          partition       4046844 0       -1

$ printf "x\np\n" | sudo fdisk /dev/mmcblk0

Disk /dev/mmcblk0: 58.2 GiB, 62537072640 bytes, 122142720 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: ED15471E-2ED3-4D17-82F0-2B21B0922606
First LBA: 34
Last LBA: 122142686
Alternative LBA: 122142719
Partition entries LBA: 2
Allocated partition entries: 128

Device             Start       End   Sectors Type-UUID                            UUID                                 Name            Attrs
/dev/mmcblk0p1      2048   1050623   1048576 C12A7328-F81F-11D2-BA4B-00A0C93EC93B 3F71D0E0-4BD1-4C17-9828-63A992FC1727 EFI System Partition
                                                                                                                                       
/dev/mmcblk0p2   1050624 114046975 112996352 0FC63DAF-8483-4772-8E79-3D69D8477DE4 ECD9E622-8DB1-45A1-9B7E-0AC5D93A9A96                 
/dev/mmcblk0p3 114046976 122140671   8093696 0657FD6D-A4AB-43C4-84E5-0933C84B4F4F 0DF8044D-7755-47FD-8A80-BE2BBC7C87EF                 

$ ls -l /run/systemd/generator/
total 16
-rw-r--r-- 1 root root 374 Apr  8 08:21 boot-efi.mount
drwxr-xr-x 2 root root  60 Apr  8 08:21 cryptsetup.target.requires
drwxr-xr-x 2 root root  60 Apr  8 08:21 dev-disk-by\x2duuid-5d1798c3\x2d4e4a\x2d4c3c\x2d842e\x2de929fbeceb85.device.wants
drwxr-xr-x 2 root root  60 Apr  8 08:21 dev-mapper-cryptswap1.device.d
drwxr-xr-x 2 root root  60 Apr  8 08:21 dev-mapper-cryptswap1.device.requires
-rw-r--r-- 1 root root 188 Apr  8 08:21 dev-mapper-cryptswap1.swap
drwxr-xr-x 2 root root  60 Apr  8 08:21 hwclock.service.d
drwxr-xr-x 2 root root  80 Apr  8 08:21 local-fs.target.requires
drwxr-xr-x 2 root root  60 Apr  8 08:21 local-fs.target.wants
-rw-r--r-- 1 root root 277 Apr  8 08:21 -.mount
drwxr-xr-x 2 root root  60 Apr  8 08:21 multi-user.target.wants
drwxr-xr-x 2 root root  60 Apr  8 08:21 networking.service.d
drwxr-xr-x 2 root root  60 Apr  8 08:21 remote-fs.target.d
drwxr-xr-x 2 root root  60 Apr  8 08:21 sendsigs.service.d
drwxr-xr-x 2 root root  60 Apr  8 08:21 swap.target.requires
-rw-r--r-- 1 root root 947 Apr  8 08:21 <email address hidden>
drwxr-xr-x 2 root root  60 Apr  8 08:21 umountfs.service.d
drwxr-xr-x 2 root root  60 Apr  8 08:21 umountnfs.service.d

$ cat /etc/fstab
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
# / was on /dev/mmcblk0p2 during installation
UUID=4fb05929-3546-4b7c-b4f0-34c4a721c3c3 /               ext4    errors=remount-ro 0       1
# /boot/efi was on /dev/mmcblk0p1 during installation
UUID=8F05-DBA1  /boot/efi       vfat    umask=0077      0       1
# swap was on /dev/mmcblk0p3 during installation
#UUID=5d1798c3-4e4a-4c3c-842e-e929fbeceb85 none            swap    sw              0       0
/dev/mapper/cryptswap1 none swap sw 0 0

$ cat /etc/crypttab
cryptswap1 UUID=5d1798c3-4e4a-4c3c-842e-e929fbeceb85 /dev/urandom swap,offset=1024,cipher=aes-xts-plain64