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Proof step 6 from proof validrefs-nopathex (previous step)

r ' + refs1 + r0 ' + refs0 = (r ' + refs1 + r0 ') + refs0, validrefs(str, r ' + refs1 + r0 ' + refs0, ty, st), validrefs(str, r ' + refs1 + r0 ' + refs0, st[r -- _type] .type, st) ⊦ r0 ∈ refs1, validrefs(str, r ' + refs1 + r0 ', st[r -- _type] .type, st)

User applied rule insert equation

And obtained the following new goals

Proof step 5:
validrefs(str, (r ' + refs1 + r0 ') + refs0, ty, st), validrefs(str, (r ' + refs1 + r0 ') + refs0, st[r -- _type] .type, st) ⊦ r0 ∈ refs1, validrefs(str, r ' + refs1 + r0 ', st[r -- _type] .type, st)

Rule argument

[inserteqarg: pos: left 1,F,T,()]

Additional information

[[CONCRETESIMPRULES : ()]]