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Proof step 4 from proof pathex-levelsubset-equiv (previous step)

¬ (level⊆(str, str0) ∧ path∃(str0, r, r0, st) ∧ validref(str, r, st[r -- _type] .type, st)), path∃(str0, r, r0, st), level⊆(str, str0) ⊦ path∃(str, r, r0, st), junkref(str, r, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 3:
path∃(str0, r, r0, st), level⊆(str, str0) ⊦ path∃(str, r, r0, st), junkref(str, r, st), validref(str, r, st[r -- _type] .type, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]