Function lemma_terminated_spec_parse_congruence 

pub proof fn lemma_terminated_spec_parse_congruence<const CHECK: bool, A1: SpecParser, A2: SpecParser<PVal = A1::PVal>, B1: SpecParser<PVal = BVal>, B2: SpecParser<PVal = BVal>, BVal>(
    a1: A1,
    a2: A2,
    b1: B1,
    b2: B2,
    b_val: BVal,
)

requires

forall |x: Seq<u8>| #[trigger] a1.spec_parse(x) == a2.spec_parse(x),

forall |x: Seq<u8>| #[trigger] b1.spec_parse(x) == b2.spec_parse(x),

ensures

forall |x: Seq<u8>| {
    #[trigger]
    (Terminated::<A1, B1, BVal, CHECK> {
        a: a1,
        b: b1,
        b_val,
    })
        .spec_parse(x)
        == (Terminated::<A2, B2, BVal, CHECK> {
            a: a2,
            b: b2,
            b_val,
        })
            .spec_parse(x)
},