temporary fix: z3refresh + a couple small changes to get this proof to go through
temporary fix: z3refresh + a couple small changes to get this proof to go through

mitls/hacl-star,mitls/hacl-star,mitls/hacl-star,mitls/hacl-star,mitls/hacl-star,mitls/hacl-star,mitls/hacl-star,mitls/hacl-star,mitls/hacl-star