Misplaced Pages

This is an old revision of this page, as edited by Paul Haroun (talk | contribs) at 08:42, 11 January 2005. The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

Delayed clause-construction (DCC), used in the theorem prover CARINE, is a stalling strategy that enhances a theorem prover's performance by reducing the work to construct clauses to a minimum. Instead of constructing every conclusion (clause) of an applied inference rule, the information to construct such clause is temporarily stored until the theorem prover decides to either discard the clause or construct it. If the theorem prover decides to keep the clause, it will be constructed and stored in memory, otherwise the information to construct the clause is erased. Storing the information from which an inferred clause can be constructed require almost no additional CPU operations. However, constructing a clause may consume a lot of time. Some theorem provers spend 30%-40% of their total execution time constructing and deleting clauses. With DCC this wasted time can be salvaged.

DCC is useful when too many intermmediate clauses are being constructed and discarded (especially first-order clauses) in a short period of time because the operations performed to construct such short lived clauses are avoided. DCC may not be very effective on theorems with only propositional clauses. (See also ATP System Carine)

• CARINE Web Site (has sound)