End InternalCall.
Section CORESTEPS.
Variable cenv : compilenv.
Variable sz : Z.
Variable f : Csharpminor.function.
Variable tfn : function.
Variable mu : SM_Injection.
Variable m tm : mem.
Variable e : Csharpminor.env.
Variable lenv : temp_env.
Variable te : env.
Variable sp lo hi: Values.block.
Variable cs : callstack.
Variable s : Csharpminor.stmt.
Variable k : Csharpminor.cont.
Variable tk : cont.
Variable xenv : exit_env.
Variable PRE: REACH_closed m (vis mu) /\
meminj_preserves_globals ge (as_inj mu) /\
(forall b, isGlobalBlock ge b = true -> frgnBlocksSrc mu b = true) /\
sm_valid mu m tm /\ SM_wd mu /\
Mem.inject (as_inj mu) m tm.
Variable TRF : transl_funbody cenv sz f = OK tfn.

Lemma MS_step_case_SkipCall:forall
(MCS : structured_match_callstack mu m tm
(Frame cenv tfn e lenv te sp lo hi :: cs)
(Mem.nextblock m)
(Mem.nextblock tm)) m'
(CC: Csharpminor.is_call_cont k)
(FL: Mem.free_list m (blocks_of_env e) = Some m')
(MK : match_cont k tk cenv xenv cs),
exists st2' : CMin_core,
exists m2' mu',
corestep_plus CMin_core_sem tge (CMin_State  tfn Sskip tk (Vptr sp Int.zero) te) tm st2' m2'
/\ intern_incr mu mu' /\
sm_inject_separated mu mu' m tm /\
sm_locally_allocated mu mu' m tm m' m2' /\
Match_cores (CSharpMin_Returnstate Vundef k) mu' (CSharpMin_Returnstate Vundef k) m' st2' m2' /\
SM_wd mu' /\
sm_valid mu' m' m2'.