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Proof step 17 from proof validrefs-addobj-junkref (previous step)

fs = mkfs(class1, ty1, fieldvar), validrefs(str, st[r1 -- fs '] .refval ' + refs, ty1, addobj(r, class, fis, st)), is_referencevalue(st[r1 -- fs ']), fs ' ∈ instfields(st[r1 -- _type] .type .class), st[r1 -- _type] .type ≤ ty0, newref(r, st), is_obj(str, r1, st), ∀ str0, ty, r0, class0, fis0, st0. validrefs(str0, st[r1 -- fs '] .refval ' + refs, ty, addobj(r0, class0, fis0, st0)) ∧ newref(r0, st0) ∧ (r0 = st[r1 -- fs '] .refval ∨ r0 ∈ refs) → junkref(str0, st[r1 -- fs '] .refval, st0) ⊦ r = r1, r = jvmref, r1 = jvmref, junkref(str, r1, st), r ≠ st[r1 -- fs '] .refval ∧ ¬ r ∈ refs

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 16:
validrefs(str, st[r1 -- mkfs(class1, ty1, fieldvar) '] .refval ' + refs, ty1, addobj(r, class, fis, st)), is_referencevalue(st[r1 -- mkfs(class1, ty1, fieldvar) ']), mkfs(class1, ty1, fieldvar) ' ∈ instfields(st[r1 -- _type] .type .class), st[r1 -- _type] .type ≤ ty0, newref(r, st), is_obj(str, r1, st), ∀ str0, ty, r0, class0, fis0, st0. validrefs(str0, st[r1 -- mkfs(class1, ty1, fieldvar) '] .refval ' + refs, ty, addobj(r0, class0, fis0, st0)) ∧ newref(r0, st0) ∧ (r0 = st[r1 -- mkfs(class1, ty1, fieldvar) '] .refval ∨ r0 ∈ refs) → junkref(str0, st[r1 -- mkfs(class1, ty1, fieldvar) '] .refval, st0) ⊦ r = r1, r = jvmref, r1 = jvmref, junkref(str, r1, st), r ≠ st[r1 -- mkfs(class1, ty1, fieldvar) '] .refval ∧ ¬ r ∈ refs

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]