theorem :: SFMASTR1:13

for p being Instruction-Sequence of SCM+FSA
for s being State of SCM+FSA
for j being sequential Instruction of SCM+FSA
for Ig being good really-closed Program of SCM+FSA st ( Ig is parahalting or Ig is_halting_on Initialized s,p ) holds
DataPart (IExec ((Ig ";" j),p,s)) = DataPart (Exec (j,(IExec (Ig,p,s))))