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Proof step 48 from proof validrefs-putbyte (previous step)

is_array(str, r0, st[r -- i ', byteval(by)]) ∧ (st[r -- i ', byteval(by)][r0 -- _type]) .type ≤ ty, st[r0 -- i0 '] = refval(refs0 .first), 0 < st[r0 -- _length] .intval, 0 ≤ i0, st[r0 -- _type] .type ≤ ty, okbytearray(r, st), is_array(str, r0, st), validrefs(str, refs0, st[r0 -- _type] .type .type, st), i0 < st[r0 -- _length] .intval, ∀ by, i, ty, str, st, r, refs1. # refs1 < # (r0 ' + refs0) → (okbytearray(r, st) ∧ validrefs(str, refs1, ty, st) → validrefs(str, refs1, ty, st[r -- i ', byteval(by)])) ⊦ r0 = jvmref, refs0 = [] ∨ (∃ i0. 0 ≤ i0 ∧ i0 < (st[r -- i ', byteval(by)][r0 -- _length]) .intval ∧ is_referencevalue(st[r -- i ', byteval(by)][r0 -- i0 ']) ∧ refs0 .first = (st[r -- i ', byteval(by)][r0 -- i0 ']) .refval ∧ validrefs(str, refs0, (st[r -- i ', byteval(by)][r0 -- _type]) .type .type, st[r -- i ', byteval(by)]))

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 47:
st[r0 -- i0 '] = refval(refs0 .first), 0 < st[r0 -- _length] .intval, 0 ≤ i0, okbytearray(r, st), is_array(str, r0, st), validrefs(str, refs0, st[r0 -- _type] .type .type, st), i0 < st[r0 -- _length] .intval, is_array(str, r0, st[r -- i ', byteval(by)]), st[r0 -- _type] .type ≤ ty, ∀ by, i, ty, str, st, r, refs1. # refs1 < # (r0 ' + refs0) → (okbytearray(r, st) ∧ validrefs(str, refs1, ty, st) → validrefs(str, refs1, ty, st[r -- i ', byteval(by)])) ⊦ r0 = jvmref, refs0 = [], ∃ i1. ¬ i1 < 0 ∧ ¬ st[r0 -- _length] .intval ≤ i1 ∧ is_referencevalue(st[r -- i ', byteval(by)][r0 -- i1 ']) ∧ refs0 .first = (st[r -- i ', byteval(by)][r0 -- i1 ']) .refval ∧ validrefs(str, refs0, st[r0 -- _type] .type .type, st[r -- i ', byteval(by)])

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ ¬ i < j ↔ j ≤ i], [CSIMPSEQ : ⊦ (st[r -- i ', val][r0 -- _length] ) = st[r0 -- _length]], [CSIMPSEQ : ⊦ ¬ i ≤ j ↔ j < i], [CSIMPSEQ : ⊦ (st[r -- i ', val][r0 -- _type]) = st[r0 -- _type]])]]