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Proof step 72 from proof validrefs-not-contains (previous step)

st[r -- mkfs(class, ty1, fieldvar) '] = refval(r1), is_obj(str, r, st), st[r -- _type] .type ≤ ty, mkfs(class, ty1, fieldvar) ' ∈ instfields(st[r -- _type] .type .class), validrefs(str, r1 ' + refs0 + r1 ', ty1, st) ⊦ r1 = jvmref, r = r1, r = jvmref, ∃ tys. contains(str, st[r -- _type] .type ' + tys + st[r1 -- _type] .type ')

User applied rule exists right

And obtained the following new goals

Proof step 71:
st[r -- mkfs(class, ty1, fieldvar) '] = refval(r1), is_obj(str, r, st), st[r -- _type] .type ≤ ty, mkfs(class, ty1, fieldvar) ' ∈ instfields(st[r -- _type] .type .class), validrefs(str, r1 ' + refs0 + r1 ', ty1, st) ⊦ r1 = jvmref, r = r1, r = jvmref, contains(str, st[r -- _type] .type ' + [] + st[r1 -- _type] .type ')

Rule argument

[EXRARG : pos: right 4, [extquanttermlist: ([])abort:F, discard:T, computed:F]]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : ([])]]