let ins be Instruction of SCM ; ( InsCode ins = 8 implies ex loc being Element of NAT ex da being Data-Location st ins = da >0_goto loc )
assume A1:
InsCode ins = 8
; ex loc being Element of NAT ex da being Data-Location st ins = da >0_goto loc
now assume
ins in { [I,{} ,<*b,c*>] where I is Element of Segm 9, b, c is Element of SCM-Data-Loc : I in {1,2,3,4,5} }
;
contradictionthen consider I being
Element of
Segm 9,
b,
c being
Element of
SCM-Data-Loc such that A3:
ins = [I,{} ,<*b,c*>]
and A4:
I in {1,2,3,4,5}
;
InsCode ins = I
by A3, RECDEF_2:def 1;
hence
contradiction
by A1, A4, ENUMSET1:def 3;
verum end;
then A5:
ins in ({[SCM-Halt ,{} ,{} ]} \/ { [J,<*a*>,{} ] where J is Element of Segm 9, a is Element of NAT : J = 6 } ) \/ { [K,<*a1*>,<*b1*>] where K is Element of Segm 9, a1 is Element of NAT , b1 is Element of SCM-Data-Loc : K in {7,8} }
by XBOOLE_0:def 3;
not ins in {[SCM-Halt ,{} ,{} ]}
by A1, Th37, AMI_3:71, TARSKI:def 1;
then
not ins in {[SCM-Halt ,{} ,{} ]} \/ { [J,<*a*>,{} ] where J is Element of Segm 9, a is Element of NAT : J = 6 }
by A2, XBOOLE_0:def 3;
then
ins in { [K,<*a1*>,<*b1*>] where K is Element of Segm 9, a1 is Element of NAT , b1 is Element of SCM-Data-Loc : K in {7,8} }
by A5, XBOOLE_0:def 3;
then consider K being Element of Segm 9, a1 being Element of NAT , b1 being Element of SCM-Data-Loc such that
A6:
ins = [K,<*a1*>,<*b1*>]
and
K in {7,8}
;
reconsider da = b1 @ as Data-Location ;
reconsider loc = a1 as Element of NAT ;
take
loc
; ex da being Data-Location st ins = da >0_goto loc
take
da
; ins = da >0_goto loc
thus
ins = da >0_goto loc
by A1, A6, RECDEF_2:def 1; verum