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Proof step 54 from proof junkrefs-null-01 (previous step)

is_obj(str, r, st) ∨ is_array(str, r, st), st[r -- _type] .type ≤ ty, ∀ str, refs0, ty, st. junkrefs(str, acc + jvmref ' + refs0, ty, st) ↔ junkrefs(str, acc, ty, st) ⊦ junkrefs(str, (r ' + acc) + jvmref ' + refs0, ty, st) ↔ junkrefs(str, r ' + acc, ty, st), r = jvmref

User applied rule case distinction

And obtained the following new goals

Proof step 31:
is_obj(str, r, st), st[r -- _type] .type ≤ ty, ∀ str, refs0, ty, st. junkrefs(str, acc + jvmref ' + refs0, ty, st) ↔ junkrefs(str, acc, ty, st) ⊦ junkrefs(str, (r ' + acc) + jvmref ' + refs0, ty, st) ↔ junkrefs(str, r ' + acc, ty, st), r = jvmref
Proof step 53:
is_array(str, r, st), st[r -- _type] .type ≤ ty, ∀ str, refs0, ty, st. junkrefs(str, acc + jvmref ' + refs0, ty, st) ↔ junkrefs(str, acc, ty, st) ⊦ junkrefs(str, (r ' + acc) + jvmref ' + refs0, ty, st) ↔ junkrefs(str, r ' + acc, ty, st), r = jvmref

Rule argument

[CASEDARG : pos: left 1, ()]

Additional information

[[CONCRETESIMPRULES : ()]]