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Proof step 99 from proof validrefs-lastelem (previous step)

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

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 98:
st[r0 -- i '] = refval(r1), 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, has_reffield(r0, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]