Definition MINMAX_Offset (b2:block) : option (Z * Z) :=
  if plt b2 (Mem.nextblock m2)
  then match (zmap_finite_c _ (PMap.get b2 m2.(Mem.mem_contents)))
       with (min2, max2) =>
          match minmax m1' (as_inj nu12) b2 with
             Some(min1, max1) =>
                  Some(Z.min min1 min2, Z.max max1 max2)
           | None => Some(min2,max2)
          end
       end
  else minmax m1' j12' b2.

Lemma EFF_interp_II_strong: forall m1 m2 nu12 (MInj12 : Mem.inject (as_inj nu12) m1 m2) m1' (Fwd1: mem_forward m1 m1') nu23 m3 (MInj23 : Mem.inject (as_inj nu23) m2 m3) m3' (Fwd3: mem_forward m3 m3') nu' (WDnu' : SM_wd nu') (SMvalNu' : sm_valid nu' m1' m3') (MemInjNu' : Mem.inject (as_inj nu') m1' m3') (ExtIncr: extern_incr (compose_sm nu12 nu23) nu') (SMInjSep: sm_inject_separated (compose_sm nu12 nu23) nu' m1 m3) (SMV12: sm_valid nu12 m1 m2) (SMV23: sm_valid nu23 m2 m3) (UnchPrivSrc: Mem.unchanged_on (fun b ofs => locBlocksSrc (compose_sm nu12 nu23) b = true /\ pubBlocksSrc (compose_sm nu12 nu23) b = false) m1 m1') (UnchLOOR13: Mem.unchanged_on (local_out_of_reach (compose_sm nu12 nu23) m1) m3 m3') (GlueInvNu: SM_wd nu12 /\ SM_wd nu23 /\ locBlocksTgt nu12 = locBlocksSrc nu23 /\ extBlocksTgt nu12 = extBlocksSrc nu23 /\ (forall b, pubBlocksTgt nu12 b = true -> pubBlocksSrc nu23 b = true) /\ (forall b, frgnBlocksTgt nu12 b = true -> frgnBlocksSrc nu23 b = true)) (Norm12: forall b1 b2 d1, extern_of nu12 b1 = Some(b2,d1) -> exists b3 d2, extern_of nu23 b2 = Some(b3, d2)), exists m2', exists nu12', exists nu23', nu'=compose_sm nu12' nu23' /\ extern_incr nu12 nu12' /\ extern_incr nu23 nu23' /\ Mem.inject (as_inj nu12') m1' m2' /\ mem_forward m2 m2' /\ Mem.inject (as_inj nu23') m2' m3' /\ sm_inject_separated nu12 nu12' m1 m2 /\ sm_inject_separated nu23 nu23' m2 m3 /\ sm_valid nu12' m1' m2' /\ sm_valid nu23' m2' m3' /\ (SM_wd nu12' /\ SM_wd nu23' /\ locBlocksTgt nu12' = locBlocksSrc nu23' /\ extBlocksTgt nu12' = extBlocksSrc nu23' /\ (forall b, pubBlocksTgt nu12' b = true -> pubBlocksSrc nu23' b = true) /\ (forall b, frgnBlocksTgt nu12' b = true -> frgnBlocksSrc nu23' b = true)) /\ (forall b1 b2 d1, extern_of nu12' b1 = Some(b2,d1) -> exists b3 d2, extern_of nu23' b2 = Some(b3, d2)) /\ Mem.unchanged_on (fun b ofs => locBlocksSrc nu23 b = true /\ pubBlocksSrc nu23 b = false) m2 m2' /\ Mem.unchanged_on (local_out_of_reach nu12 m1) m2 m2' /\ (* Mem.unchanged_on (local_out_of_reach nu23 m2) m3 m3' /\*) (forall b1 b2 d1, as_inj nu12' b1 = Some(b2,d1) -> as_inj nu12 b1 = Some(b2,d1) \/ exists b3 d, as_inj nu' b1 = Some(b3,d)) /\ (forall b2 b3 d2, as_inj nu23' b2 = Some(b3,d2) -> as_inj nu23 b2 = Some(b3,d2) \/ exists b1 d, as_inj nu' b1 = Some(b3,d)) /\ (forall b1 b2 ofs2, as_inj nu12' b1 = Some(b2,ofs2) -> (as_inj nu12 b1 = Some (b2,ofs2)) \/ (b1 = Mem.nextblock m1 /\ b2 = Mem.nextblock m2 /\ ofs2 = 0) \/ (exists m, (b1 = Mem.nextblock m1 + m /\ b2=Mem.nextblock m2 + m)%positive /\ ofs2=0)) /\ (forall b2 b3 ofs3, as_inj nu23' b2 = Some(b3,ofs3) -> (as_inj nu23 b2 = Some (b3,ofs3)) \/ (b2 = Mem.nextblock m2 /\ as_inj nu' (Mem.nextblock m1) = Some(b3,ofs3)) \/ (exists m, (b2 = Mem.nextblock m2 + m)%positive /\ as_inj nu' ((Mem.nextblock m1+m)%positive) = Some(b3,ofs3))).