INFO: ./ivltests/fatal_et_al2.v:3: This is the $info message.
      Time: 1  Scope: top
WARNING: ./ivltests/fatal_et_al2.v:4: This is the $warning message.
         Time: 2  Scope: top
ERROR: ./ivltests/fatal_et_al2.v:5: This is the $error message.
       Time: 3  Scope: top
FATAL: ./ivltests/fatal_et_al2.v:6: This is the $fatal message.
       Time: 4  Scope: top