Section X86Context.
Context {initU: seq.seq nat}
{the_program: Asm.program}.
Notation the_ge := (@the_ge the_program).
Context {Hsafe : safe_genv the_ge}.
Instance X86Sem: Semantics := @X86Sem the_program Hsafe.

Lemma at_external_halted_excl:
forall q m, semantics.at_external (@semSem X86Sem) q m = None \/ forall i, ~ halted semSem q i.