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Proof step 4 from proof copy-length (conclusion)

⊦ (arraycopy(r1, i1, r2, i2, j, st)[r -- _length]) = st[r -- _length]

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 1:
⊦ _length = mkfs(`*Array*' .class, int_type, `length' .field) '
Proof step 3:
⊦ (arraycopy(r1, i1, r2, i2, j, st)[r -- mkfs(`*Array*' .class, int_type, `length' .field) ']) = st[r -- mkfs(`*Array*' .class, int_type, `length' .field) ']

Rule argument

[speclemmaarg: ,_length = mkfs(`*Array*' .class, int_type, `length' .field) ' ,[] → [] ,F ,specialkeys , ,length ]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : ()]]