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 corestep_nextblock :
forall c m c' m',
corestep semSem c m c' m' ->
(Memory.Mem.nextblock m <= Memory.Mem.nextblock m')%positive.