Add noverific task to test the non verific code

Mostly for CI to ensure fallback code still functions as intended.a
Also reverted the change in the grep command to 1 line after.

docs/examples/fifo/fifo.sby

@@ -2,6 +2,7 @@
 basic bmc
 nofullskip prove
 cover
+noverific cover
 basic cover : default
 
 [options]
@@ -20,6 +21,7 @@ smtbmc boolector
 
 [script]
 nofullskip: read -define NO_FULL_SKIP=1
+noverific: read -noverific
 read -formal fifo.sv
 prep -top fifo