File: lift-term1.lisp

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; Milawa - A Reflective Theorem Prover
; Copyright (C) 2005-2009 Kookamara LLC
;
; Contact:
;
;   Kookamara LLC
;   11410 Windermere Meadows
;   Austin, TX 78759, USA
;   http://www.kookamara.com/
;
; License: (An MIT/X11-style license)
;
;   Permission is hereby granted, free of charge, to any person obtaining a
;   copy of this software and associated documentation files (the "Software"),
;   to deal in the Software without restriction, including without limitation
;   the rights to use, copy, modify, merge, publish, distribute, sublicense,
;   and/or sell copies of the Software, and to permit persons to whom the
;   Software is furnished to do so, subject to the following conditions:
;
;   The above copyright notice and this permission notice shall be included in
;   all copies or substantial portions of the Software.
;
;   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
;   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
;   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
;   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
;   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
;   FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
;   DEALINGS IN THE SOFTWARE.
;
; Original author: Jared Davis <jared@kookamara.com>

(in-package "MILAWA")
(include-book "depth-3-special")
(%interactive)

(%autoadmit clause.lift-term1)


(defmacro %clause.lift-term1-induction (x)
  `(%induct (rank ,x)
            ((logic.constantp ,x)
             nil)
            ((logic.variablep ,x)
             nil)
            ((logic.functionp ,x)
             (((,x (first (logic.function-args ,x))))
              ((,x (second (logic.function-args ,x))))
              ((,x (third (logic.function-args ,x))))))
            ((logic.lambdap ,x)
             nil)
            ((and (not (logic.constantp ,x))
                  (not (logic.variablep ,x))
                  (not (logic.functionp ,x))
                  (not (logic.lambdap ,x)))
             nil)))


(local (%disable default
                 same-length-prefixes-equal-cheap
                 logic.termp-when-logic.formulap))

(%autoprove forcing-logic.termp-of-clause.lift-term1
            (%clause.lift-term1-induction x)
            (%restrict default clause.lift-term1 (equal x 'x))
            (%disable default
                      expensive-arithmetic-rules
                      type-set-like-rules))

(%autoprove forcing-logic.term-atblp-of-clause.lift-term1
            (%clause.lift-term1-induction x)
            (%restrict default clause.lift-term1 (equal x 'x))
            (%disable default
                      expensive-arithmetic-rules
                      type-set-like-rules))

(%autoprove clause.lift-term1-when-no-clause.unlifted-subterms
            (%clause.lift-term1-induction x)
            (%restrict default clause.lift-term1 (equal x 'x))
            (%disable default
                      expensive-arithmetic-rules
                      type-set-like-rules))



(%autoprove forcing-clause.depth-of-clause.factor-strong)

(local (%enable default forcing-clause.depth-of-clause.factor-strong))


(%autoprove lemma-for-clause.depth-decreases-in-lambda-case
            (%disable default clause.deepest-weakly-deeper-than-any-member)
            (%use (%instance (%thm clause.deepest-weakly-deeper-than-any-member)
                             (x (logic.lambda-actuals x))
                             (a (clause.deepest-after-factoring (logic.lambda-actuals x) assignment)))))

(%autoprove lemma2-for-clause.depth-decreases-in-lambda-case
            (%disable default
                      expensive-arithmetic-rules
                      type-set-like-rules
                      clause.simple-term-listp-of-domain-of-clause.cases
                      disjoint-from-nonep-of-domain-of-clause.cases
                      lemma-for-clause.depth-decreases-in-lambda-case)
            (%use (%instance (%thm lemma-for-clause.depth-decreases-in-lambda-case)
                             (assignment (clause.special-assignment x (clause.cases (clause.simple-tests-list (logic.lambda-actuals x)) nil)))))

            (%use (%instance (%thm clause.simple-term-listp-of-domain-of-clause.cases)
                             (x     (clause.special-assignment x (clause.cases (clause.simple-tests-list (logic.lambda-actuals x)) nil)))
                             (cases (clause.simple-tests-list (logic.lambda-actuals x)))
                             (assignment nil)))

            (%use (%instance (%thm disjoint-from-nonep-of-domain-of-clause.cases)
                             (x     (clause.special-assignment x (clause.cases (clause.simple-tests-list (logic.lambda-actuals x)) nil)))
                             (cases (clause.simple-tests-list (logic.lambda-actuals x)))
                             (set   (clause.term-paths-list (logic.lambda-actuals x)))
                             (assignment nil))))

(%autoprove clause.depth-decreases-in-lambda-case
            (%enable default
                     clause.depth-list-redefinition
                     lemma2-for-clause.depth-decreases-in-lambda-case)
            (%disable default
                      expensive-arithmetic-rules
                      type-set-like-rules))



(%autoprove lemma-for-clause.depth-decreases-in-logic.functionp-case
            (%disable default clause.deepest-weakly-deeper-than-any-member)
            (%use (%instance (%thm clause.deepest-weakly-deeper-than-any-member)
                             (x (logic.function-args x))
                             (a (clause.deepest-after-factoring (logic.function-args x) assignment)))))

(%autoprove lemma2-for-clause.depth-decreases-in-logic.functionp-case
            (%disable default
                      clause.simple-term-listp-of-domain-of-clause.cases
                      disjoint-from-nonep-of-domain-of-clause.cases
                      lemma-for-clause.depth-decreases-in-logic.functionp-case
                      type-set-like-rules
                      expensive-arithmetic-rules)
            (%use (%instance (%thm lemma-for-clause.depth-decreases-in-logic.functionp-case)
                             (assignment (clause.special-assignment x (clause.cases (clause.simple-tests-list (logic.function-args x)) nil)))))
            (%use (%instance (%thm clause.simple-term-listp-of-domain-of-clause.cases)
                             (x     (clause.special-assignment x (clause.cases (clause.simple-tests-list (logic.function-args x)) nil)))
                             (cases (clause.simple-tests-list (logic.function-args x)))
                             (assignment nil)))
            (%use (%instance (%thm disjoint-from-nonep-of-domain-of-clause.cases)
                             (x     (clause.special-assignment x (clause.cases (clause.simple-tests-list (logic.function-args x)) nil)))
                             (cases (clause.simple-tests-list (logic.function-args x)))
                             (set   (clause.term-paths-list (logic.function-args x)))
                             (assignment nil))))

(%autoprove clause.depth-decreases-in-non-if-logic.functionp-case
            (%disable default
                      expensive-arithmetic-rules
                      type-set-like-rules
                      clause.simple-termp-when-bad-args-logic.functionp
                      clause.unlifted-subterms-when-bad-args-logic.functionp)
            (%enable default
                     clause.depth-list-redefinition
                     lemma2-for-clause.depth-decreases-in-logic.functionp-case))

(%autoprove clause.depth-decreases-in-bad-args-logic.functionp-case
            (%enable default
                     clause.depth-list-redefinition
                     lemma2-for-clause.depth-decreases-in-logic.functionp-case))

(%autoprove clause.lift-term1-makes-progress
            (%clause.lift-term1-induction x)
            (%auto :strategy (cleanup split urewrite))
            (%disable default
                      expensive-arithmetic-rules
                      type-set-like-rules)
            (%crewrite default)
            (%auto :strategy (cleanup split urewrite))
            (%restrict default definition-of-clause.depth (equal x 'x))
            (%restrict default clause.lift-term1 (equal x 'x))
            (%enable default
                     clause.depth-decreases-in-bad-args-logic.functionp-case
                     clause.depth-decreases-in-non-if-logic.functionp-case
                     clause.depth-decreases-in-lambda-case)
            (%disable default
                      expensive-arithmetic-rules-two
                      clause.depth-list-when-length-three)
            (%crewrite default)
            (%auto :strategy (cleanup split urewrite))
            (%crewrite default)
            (%auto :strategy (cleanup split urewrite))
            (%enable default
                     clause.depth-list-when-length-three
                     expensive-arithmetic-rules
                     expensive-arithmetic-rules-two
                     type-set-like-rules))