let s be State of SCM+FSA; :: thesis: ( ( s . (intloc (4 + 1)) > 0 implies (IExec ((if>0 ((intloc (4 + 1)),(Macro (SubFrom ((intloc (1 + 1)),(intloc (1 + 1))))),((AddTo ((intloc (3 + 1)),(intloc 0))) ';' (SubFrom ((intloc (1 + 1)),(intloc 0)))))),s)) . (intloc (3 + 1)) = s . (intloc (3 + 1)) ) & ( s . (intloc (4 + 1)) <= 0 implies (IExec ((if>0 ((intloc (4 + 1)),(Macro (SubFrom ((intloc (1 + 1)),(intloc (1 + 1))))),((AddTo ((intloc (3 + 1)),(intloc 0))) ';' (SubFrom ((intloc (1 + 1)),(intloc 0)))))),s)) . (intloc (3 + 1)) = (s . (intloc (3 + 1))) + 1 ) )
set s0 = Initialized s;
A1: intloc (1 + 1) <> intloc (3 + 1) by SCMFSA_2:128;

hereby :: thesis: ( s . (intloc (4 + 1)) <= 0 implies (IExec ((if>0 ((intloc (4 + 1)),(Macro (SubFrom ((intloc (1 + 1)),(intloc (1 + 1))))),((AddTo ((intloc (3 + 1)),(intloc 0))) ';' (SubFrom ((intloc (1 + 1)),(intloc 0)))))),s)) . (intloc (3 + 1)) = (s . (intloc (3 + 1))) + 1 )

assume s . (intloc (4 + 1)) > 0 ; :: thesis: (IExec ((if>0 ((intloc (4 + 1)),(Macro (SubFrom ((intloc (1 + 1)),(intloc (1 + 1))))),((AddTo ((intloc (3 + 1)),(intloc 0))) ';' (SubFrom ((intloc (1 + 1)),(intloc 0)))))),s)) . (intloc (3 + 1)) = s . (intloc (3 + 1))
hence (IExec ((if>0 ((intloc (4 + 1)),(Macro (SubFrom ((intloc (1 + 1)),(intloc (1 + 1))))),((AddTo ((intloc (3 + 1)),(intloc 0))) ';' (SubFrom ((intloc (1 + 1)),(intloc 0)))))),s)) . (intloc (3 + 1)) = (IExec ((Macro (SubFrom ((intloc (1 + 1)),(intloc (1 + 1))))),s)) . (intloc (3 + 1)) by SCM_HALT:54
.= (Exec ((SubFrom ((intloc (1 + 1)),(intloc (1 + 1)))),(Initialized s))) . (intloc (3 + 1)) by SCMFSA6C:6
.= (Initialized s) . (intloc (3 + 1)) by A1, SCMFSA_2:91
.= s . (intloc (3 + 1)) by SCMFSA6C:3 ;
:: thesis: verum

end;

hereby :: thesis: verum

assume s . (intloc (4 + 1)) <= 0 ; :: thesis: (IExec ((if>0 ((intloc (4 + 1)),(Macro (SubFrom ((intloc (1 + 1)),(intloc (1 + 1))))),((AddTo ((intloc (3 + 1)),(intloc 0))) ';' (SubFrom ((intloc (1 + 1)),(intloc 0)))))),s)) . (intloc (3 + 1)) = (s . (intloc (3 + 1))) + 1
hence (IExec ((if>0 ((intloc (4 + 1)),(Macro (SubFrom ((intloc (1 + 1)),(intloc (1 + 1))))),((AddTo ((intloc (3 + 1)),(intloc 0))) ';' (SubFrom ((intloc (1 + 1)),(intloc 0)))))),s)) . (intloc (3 + 1)) = (IExec (((AddTo ((intloc (3 + 1)),(intloc 0))) ';' (SubFrom ((intloc (1 + 1)),(intloc 0)))),s)) . (intloc (3 + 1)) by SCM_HALT:54
.= (Exec ((SubFrom ((intloc (1 + 1)),(intloc 0))),(Exec ((AddTo ((intloc (3 + 1)),(intloc 0))),(Initialized s))))) . (intloc (3 + 1)) by SCMFSA6C:9
.= (Exec ((AddTo ((intloc (3 + 1)),(intloc 0))),(Initialized s))) . (intloc (3 + 1)) by A1, SCMFSA_2:91
.= ((Initialized s) . (intloc (3 + 1))) + ((Initialized s) . (intloc 0)) by SCMFSA_2:90
.= ((Initialized s) . (intloc (3 + 1))) + 1 by SCMFSA6C:3
.= (s . (intloc (3 + 1))) + 1 by SCMFSA6C:3 ;
:: thesis: verum

end;