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Proof step 48 from proof unchanged-fits (previous step)

unchanged(str, r, st, st0), fits(r, sk ' + sks0, st), ∀ str, r, st, st0. unchanged(str, r, st, st0) ∧ fits(r, sks0, st) → junkref(str, r, st) ∨ fits(r, sks0, st0) ⊦ junkref(str, r, st), fits(r, sk ' + sks0, st0)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 2:
⊦ sks ≠ [] → ( fits(r, sks, st) ↔ r ≠ jvmref ∧ is_referencevalue(st[r -- sks .first]) ∧ (is_classtype(st[r -- _type] .type) → sks .first ∈ instfields(st[r -- _type] .type .class)) ∧ (is_arraytype(st[r -- _type] .type) → is_indexkey(sks .first) ∧ 0 ≤ sks .first .index ∧ sks .first .index < st[r -- _length] .intval) ∧ fits(st[r -- sks .first] .refval, sks .rest, st))
Proof step 47:
sk ' + sks0 ≠ [], unchanged(str, r, st, st0), fits(r, sk ' + sks0, st), ∀ str, r, st, st0. unchanged(str, r, st, st0) ∧ fits(r, sks0, st) → junkref(str, r, st) ∨ fits(r, sks0, st0) ⊦ junkref(str, r, st), r ≠ jvmref ∧ is_referencevalue(st0[r -- (sk ' + sks0) .first]) ∧ (is_classtype(st0[r -- _type] .type) → (sk ' + sks0) .first ∈ instfields(st0[r -- _type] .type .class)) ∧ ( is_arraytype(st0[r -- _type] .type) → is_indexkey((sk ' + sks0) .first) ∧ 0 ≤ (sk ' + sks0) .first .index ∧ (sk ' + sks0) .first .index < st0[r -- _length] .intval) ∧ fits(st0[r -- (sk ' + sks0) .first] .refval, (sk ' + sks0) .rest, st0)

Rule argument

[x0lemmaarg: spec-name: instance-name: lemma-name: fits-rec antecedent: succedent: sks ≠ [] → ( fits(r, sks, st) ↔ r ≠ jvmref ∧ is_referencevalue(st[r -- sks .first]) ∧ ( is_classtype(st[r -- _type] .type) → sks .first ∈ instfields(st[r -- _type] .type .class)) ∧ ( is_arraytype(st[r -- _type] .type) → is_indexkey(sks .first) ∧ 0 ≤ sks .first .index ∧ sks .first .index < st[r -- _length] .intval) ∧ fits(st[r -- sks .first] .refval, sks .rest, st)) substlist: [st, sks, r] → [st0, sk ' + sks0, r] add preconditions?: F is rewrite lemma?: T current spec?: T rotate lemma?: F replace all?: T paths: ((1, 0, 1)) dummy: () ]

Additional information

[[CONCRETESIMPRULES : ([CSIMPNAMEDSEQ : list, storekeys, app-02-ant, ⊦ ¬ sks + sks0 ≠ [] ↔ sks = [] ∧ sks0 = []], [CSIMPNAMEDSEQ : list, storekeys, e, ⊦ sk ' ≠ []], [CSIMPNAMEDSEQ : list, storekeys, a, ⊦ (sks + sks0) + sks1 = sks + sks0 + sks1])], [EXTRATERMS : (st0, sk ' + sks0, r)]]