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Proof step 95 from proof validrefs-lastelem (previous step)

st[r0 -- i '] = refval(r1), r0 ≠ jvmref ∧ r0 -- _type ∈ st ∧ is_typevalue(st[r0 -- _type]) ∧ is_arraytype(st[r0 -- _type] .type) ∧ okarray(r0, st[r0 -- _type] .type .type, st), 0 ≤ i, 0 < st[r0 -- _length] .intval, is_array(str, r0, st), st[r0 -- _type] .type ≤ ty, i < st[r0 -- _length] .intval, r1 = jvmref ∨ is_valid_ref(str, r1, st) ∧ st[r1 -- _type] .type = st[r0 -- _type] .type .type ⊦ r0 = jvmref, st[r0 -- _type] .type .type = void_type, is_reftype(st[r0 -- _type] .type .type)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 94:
st[r0 -- i '] = refval(r1), r0 -- _type ∈ st, is_typevalue(st[r0 -- _type]), is_arraytype(st[r0 -- _type] .type), okarray(r0, st[r0 -- _type] .type .type, st), 0 ≤ i, 0 < st[r0 -- _length] .intval, is_array(str, r0, st), st[r0 -- _type] .type ≤ ty, i < st[r0 -- _length] .intval, r0 ∈ st, r1 = jvmref ∨ is_valid_ref(str, r1, st) ∧ st[r1 -- _type] .type = st[r0 -- _type] .type .type ⊦ st[r0 -- _type] .type .type = void_type, r0 = jvmref, is_reftype(st[r0 -- _type] .type .type)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPFORWARD : ⊦ r -- sk ∈ st → r ∈ st], [CSIMPFORWARD : ⊦ okarray(r, ty, st) → r ≠ jvmref ∧ r ∈ st])]]