7.11 Tabling predicate reference
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Availability:built-in
Sourcenot_exists(:Goal)
Handles tabled negation for non-ground (floundering) Goal as well as non tabled goals. If Goal is ground and tabled not_exists/1 calls tnot/1. Otherwise it used tabled_call(Goal) to create a table and subsequently uses tnot/1 on the created table.

Logically, not_exists(p(X)) is defined as tnot(∃X(p(X)))

Note that each Goal variant populates a table for tabled_call/1. Applications may need to abolish such tables to limit memory usage or guarantee consistency‘after the world changed'.