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Proof step 15 from proof validrefs-one (previous step)

⊦ validrefs(str, r ', ty, st) ↔ r = jvmref ∨ is_valid_ref(str, r, st) ∧ st[r -- _type] .type ≤ ty

User applied rule cut formula

And obtained the following new goals

Proof step 1:
⊦ validrefs(str, jvmref ', ty, st)
Proof step 14:
⊦ r = jvmref, validrefs(str, r ', ty, st) ↔ r = jvmref ∨ is_valid_ref(str, r, st) ∧ st[r -- _type] .type ≤ ty

Rule argument

[fma-arg: r = jvmref]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRAFMAS : (r = jvmref)]]