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Proof step 7 from proof unchanged-rec-generic (previous step)

r ≠ jvmref, st[r -- mkfs(class, ty, fieldvar) '] = refval(r0), st[r -- _type] .type = mkclasstype(class0), unchanged(str, r, st, st0), mkfs(class, ty, fieldvar) ' ∈ instfields(class0), is_obj(str, r, st) ⊦ r = jvmref, r0 = jvmref, junkref(str, r, st), unchanged(str, r0, st, st0), st[r0 -- _type] .type ≤ ty ∧ is_valid_ref(str, r0, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 6:
st[r -- _type] .type = mkclasstype(class0), st[r -- mkfs(class, ty, fieldvar) '] = refval(r0), is_obj(str, r, st), mkfs(class, ty, fieldvar) ' ∈ instfields(class0), unchanged(str, r, st, st0) ⊦ r = jvmref, r0 = jvmref, unchanged(str, r0, st, st0), junkref(str, r, st), st[r0 -- _type] .type ≤ ty ∧ is_valid_ref(str, r0, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]