let p be Instruction-Sequence of SCM+FSA; for s being State of SCM+FSA
for a being read-write Int-Location
for I being really-closed parahalting MacroInstruction of SCM+FSA st WithVariantWhile>0 a,I,s,p holds
while>0 (a,I) is_halting_on s,p
let s be State of SCM+FSA; for a being read-write Int-Location
for I being really-closed parahalting MacroInstruction of SCM+FSA st WithVariantWhile>0 a,I,s,p holds
while>0 (a,I) is_halting_on s,p
let a be read-write Int-Location; for I being really-closed parahalting MacroInstruction of SCM+FSA st WithVariantWhile>0 a,I,s,p holds
while>0 (a,I) is_halting_on s,p
let I be really-closed parahalting MacroInstruction of SCM+FSA ; ( WithVariantWhile>0 a,I,s,p implies while>0 (a,I) is_halting_on s,p )
assume A1:
WithVariantWhile>0 a,I,s,p
; while>0 (a,I) is_halting_on s,p
ProperBodyWhile>0 a,I,s,p
by SCMFSA7B:19;
hence
while>0 (a,I) is_halting_on s,p
by A1, Th27; verum