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Proof step 12 from proof validref-put-null (previous step)

is_reftype(ty0), validref(str, r, ty, st) ⊦ r = jvmref ∨ (st[r0 -- mkfs(class, ty0, fieldvar) ', refval(jvmref)][r -- _type]) .type ≤ ty ∧ ¬ junkref(str, r, st[r0 -- mkfs(class, ty0, fieldvar) ', refval(jvmref)])

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 11:
validref(str, r, ty, st), is_reftype(ty0) ⊦ r = jvmref, (st[r0 -- mkfs(class, ty0, fieldvar) ', refval(jvmref)][r -- _type]) .type ≤ ty ∧ ¬ junkref(str, r, st[r0 -- mkfs(class, ty0, fieldvar) ', refval(jvmref)])

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]