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Proof step 16 from proof maxpath-object (previous step)

fs = mkfs(class, ty, fieldvar), st[r -- fs '] = refval(r0), maxpath(str, r, st) = 1, is_obj(r, st), 1 ≤ maxpath(str, r0, st), validrefs(str, r ', st[r -- _type] .type, st), fs ' ∈ instfields(st[r -- _type] .type .class), is_obj(str, r, st) ⊦ validrefset(str, r, st) = ∅, # validrefset(str, r, st) = 0, maxpath(str, r0, st) = 0, junkref(str, r, st), cyclic(str, r, st), is_reftype(ty)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 15:
st[r -- mkfs(class, ty, fieldvar) '] = refval(r0), maxpath(str, r, st) = 1, is_obj(r, st), 1 ≤ maxpath(str, r0, st), validrefs(str, r ', st[r -- _type] .type, st), mkfs(class, ty, fieldvar) ' ∈ instfields(st[r -- _type] .type .class), is_obj(str, r, st) ⊦ validrefset(str, r, st) = ∅, # validrefset(str, r, st) = 0, maxpath(str, r0, st) = 0, junkref(str, r, st), cyclic(str, r, st), is_reftype(ty)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]