let s be State of SCMPDS; :: thesis: for I being halt-free shiftable Program of SCMPDS
for J being shiftable Program of SCMPDS
for a, b being Int_position
for k1 being Integer st s . (DataLoc ((s . a),k1)) > 0 & I is_closed_on s & I is_halting_on s holds
(IExec ((if>0 (a,k1,I,J)),s)) . b = (IExec (I,s)) . b
let I be halt-free shiftable Program of SCMPDS; :: thesis: for J being shiftable Program of SCMPDS
for a, b being Int_position
for k1 being Integer st s . (DataLoc ((s . a),k1)) > 0 & I is_closed_on s & I is_halting_on s holds
(IExec ((if>0 (a,k1,I,J)),s)) . b = (IExec (I,s)) . b
let J be shiftable Program of SCMPDS; :: thesis: for a, b being Int_position
for k1 being Integer st s . (DataLoc ((s . a),k1)) > 0 & I is_closed_on s & I is_halting_on s holds
(IExec ((if>0 (a,k1,I,J)),s)) . b = (IExec (I,s)) . b
let a, b be Int_position ; :: thesis: for k1 being Integer st s . (DataLoc ((s . a),k1)) > 0 & I is_closed_on s & I is_halting_on s holds
(IExec ((if>0 (a,k1,I,J)),s)) . b = (IExec (I,s)) . b
let k1 be Integer; :: thesis: ( s . (DataLoc ((s . a),k1)) > 0 & I is_closed_on s & I is_halting_on s implies (IExec ((if>0 (a,k1,I,J)),s)) . b = (IExec (I,s)) . b )
assume that
A1: s . (DataLoc ((s . a),k1)) > 0 and
A2: I is_closed_on s and
A3: I is_halting_on s ; :: thesis: (IExec ((if>0 (a,k1,I,J)),s)) . b = (IExec (I,s)) . b
A4: not b in dom (Start-At ((((card I) + (card J)) + 2),SCMPDS)) by SCMPDS_4:59;
IExec ((if>0 (a,k1,I,J)),s) = (IExec (I,s)) +* (Start-At ((((card I) + (card J)) + 2),SCMPDS)) by A1, A2, A3, SCMPDS_6:84;
hence (IExec ((if>0 (a,k1,I,J)),s)) . b = (IExec (I,s)) . b by A4, FUNCT_4:12; :: thesis: verum