Merge branch 'master' into bv_rea_clem

Conflicts: examples/hackers-delight/why3session.xml examples/hackers-delight/why3shapes.gz theories/bv.why

Merge branch 'master' into bv_rea_clem
Conflicts: examples/hackers-delight/why3session.xml examples/hackers-delight/why3shapes.gz theories/bv.why
72521ec5 · Clément Fumex · 1a0d9e4a · 37fa5ab1 · 72521ec5 · 72521ec5
Commit 72521ec5 authored May 28, 2015 by Clément Fumex
20 changed files
--- a/CHANGES
+++ b/CHANGES

 * marks an incompatible change

+Version 0.86.1, May 22, 2015
+============================
+
+IDE
+  o improved task highlighting for negated premises
+    (contributed by Mikhail Mandrykin, AstraVer project)
+
+provers
+  o support for Gappa 1.2 (released May 19, 2015)
+
+bug fixes
+  o why3doc: garbled output
+
+version 0.86, May 11, 2015
+==========================
+
 core
  o steps limit for reliable replay of proofs, available for Alt-Ergo
    and CVC4
@@ -27,16 +43,18 @@ provers
    http://www.lix.polytechnique.fr/~lengrand/Psyche/)
  o preliminary support for upcoming CVC4 1.5 (steps feature)

-bug fixes:
-  o bug in interpreter in presence of nested mutable fields
-  o IDE: proofs in progress should never be "cleaned"
-  o IDE: display warnings after reload
-
-IDE:
+IDE
  o config file not automatically saved anymore at exit. Configuration
    is saved on disk for future sessions if, and only if, preferences
    window is exited by hitting the "Save&Close" button
  o right part of main window organized in tabs.
+  o better explanations and task highlighting
+    (contributed by Mikhail Mandrykin, AstraVer project)
+
+bug fixes
+  o bug in interpreter in presence of nested mutable fields
+  o IDE: proofs in progress should never be "cleaned"
+  o IDE: display warnings after reload

 version 0.85, September 17, 2014
 ================================

--- a/ROADMAP
+++ b/ROADMAP
@@ -147,6 +147,52 @@ and no epsilon
   chaque instance necessaires. plutot qu'un seul symbole _match
   polymorphe.

+==================== Roadmap for release 0.87 ========================
+
+DATE : ?
+
+Release Notes (details in file CHANGES):
+
+== TODO ==
+
+* fix bug 18953 : (<>) not allowed as prefix form
+
+* finalize detect_polymorphism. Allow polymorphic tuples (supported by SMT ?)
+
+* integrate server feature done by Johannes
+
+* Coq realization of bitvector theory
+
+* make counter-examples feature more robust
+
+* support for both isabelle 2014 and 2015
+
+* review support for division operators by SMT provers
+
+* take some time to fix some bugs of the BTS: 18029 at least
+
+* use the file generated by altgr-ergo to replay proofs edited by altgr-ergo
+
+  alt-ergo -replay <file>.agr
+
+* make the strategy feature public and documented. Possibly generate
+  default stratregies dynamically at the time of why3 config --detect,
+  using the provers detected : for that, we can annotated the provers in
+  prover-detection-data.conf to tell if they should be used in the strategies,
+  with which priority
+
+  2 possible default strategies
+
+  . favor use of many prover before splitting or increading timeout
+
+  . or, on the contrary, favor splitting
+
+  . or, favor timelimt increase...
+
+
+
+
+
 ==================== Roadmap for release 0.86 ========================

 DATE : fin avril / début mai
@@ -159,17 +205,19 @@ Release Notes (details in file CHANGES):

 == TODO ==

-* plusieurs drivers acceptés sur la ligne de commande (AP)
-
-* clean up the support for SMTLIB bitvectors: there are 2 theories in the stdlib: thoeries/bv.why and modules/bitvectors.mlw
-> not anymore, but more cleaning can be done: no need to separate all theories in drivers for Z3 and CVC4, since the same theory can be put several times in a driver (or imported sub-drivers)
-
 * decide if GUI with tabs is convenient enough
 -> onglets dans why3 ide : est-ce apprécié ? OUI
    mais enlever l'onglet "Counterexamples" avant la release

+* for next release: complete realization of bitvector library
+
 == DONE ==

+* clean up the support for SMTLIB bitvectors: there are 2 theories in the stdlib: thoeries/bv.why and modules/bitvectors.mlw
+-> not anymore, but more cleaning can be done: no need to separate all theories in drivers for Z3 and CVC4, since the same theory can be put several times in a driver (or imported sub-drivers)
+
+* DONE plusieurs drivers acceptés sur la ligne de commande (AP)
+
 * solve issues with metitarski
 . DONE theory PowerReal
 . DONE crashes when applied on a WP (see examples/my_cosine.mlw)
@@ -216,15 +264,7 @@ DONE * sauvegarde de la configuration : à quel endroit dans l'IDE ?
  (check that manual in HTML is also generated, doc/html/index.html)
 * do "make dist"
 * test distrib/why3-0.86.tar.gz
-* put on the web page why3-0.86.tar.gz:
-  cp distrib/why3-0.86.tar.gz /users/www-perso/projets/why3/download
-* inform Jerry James <loganjerry@gmail.com> so that he can test the
-  Fedora package
-* install web page for why2 which includes an updated page for the
-  quick migration guide. (sources are in CVS repository
-  ~filliatr/ARCHIVE/www/why).
 * move distrib from Why3 site to Inria forge:
-** remove /users/www-perso/projets/why3/download/why3-0.86.tar.gz
 ** upload distrib/why3-0.86.tar.gz to https://gforge.inria.fr/frs/?group_id=2990
 * put on the web page
 - the manual in PDF
@@ -239,35 +279,19 @@ DONE * sauvegarde de la configuration : à quel endroit dans l'IDE ?
 - standard library online, using why3doc, to http://why3.lri.fr/stdlib/
   make stdlibdoc
   cp -r doc/stdlibdoc /users/www-perso/projets/why3/stdlib-0.86
-   rm /users/www-perso/projets/why3/stdlib
-   ln -s /users/www-perso/projets/why3/stdlib-0.86 \
-            /users/www-perso/projets/why3/stdlib
+   ln -s -n -f stdlib-0.86 /users/www-perso/projets/why3/stdlib
+
 - API doc, produced using ocamldoc, to http://why3.lri.fr/api/
-    make apidoc
-    cp -r doc/apidoc /users/www-perso/projets/why3/api-0.86
-    rm /users/www-perso/projets/why3/api
-    ln -s /users/www-perso/projets/why3/api-0.86 \
-      /users/www-perso/projets/why3/api
+   make apidoc
+   cp -r doc/apidoc /users/www-perso/projets/why3/api-0.86
+   ln -s -n -f api-0.86 /users/www-perso/projets/why3/api

 - update the main HTML page (sources are in repository why3-www)
-   edit index.html
+   edit index.html, change at least all occurrences of 0.85 by 0.86, and
+     update the url for download
   make (to check validity)
   make export

- - add links to extra resources like
-   http://why3.lri.fr/jfla-2012/, http://www.lri.fr/~marche/MPRI-2-36-1/,
-   page du cours de l'X (in french ? using Krakatoa/why3 bridge)
-
- - make everything writeable for the group
-   chmod -R g+w /users/www-perso/projets/why3
-
-* prepare for the OPAM package
-
-. update opam/url: url and checksum of why-0.86.tar.gz
-   (use "md5sum distrib/why3-0.86.tar.gz")
-. update opam/descr if necessary
-. update opam/opam with correct dependencies and such
-
 * make a last commit:
 - git commit -am "release 0.86"
 - add tag 0.86 to the git repository, using
@@ -279,15 +303,11 @@ DONE * sauvegarde de la configuration : à quel endroit dans l'IDE ?
 * add a new version to the bugtracker:
  https://gforge.inria.fr/tracker/admin/?group_id=2990&atid=10293&add_extrafield=1

+* The next commit : add +git to the version in file Version

-* test the OPAM package
+* prepare the OPAM package

-  . with opam 1.2:
-    opam pin add why3 --kind=git <...>/why3/.git
-    (it runs "opam install why3")
-  . with opam < 1.2:
-
-    - first step: have a local copy of opam-repository if not done yet, e.g.:
+. obtain a local copy of opam repository, or obtain a former one :

        git clone git@github.com:claudemarche/opam-repository.git
        cd opam-repository/
@@ -299,21 +319,25 @@ DONE * sauvegarde de la configuration : à quel endroit dans l'IDE ?
        git reset --hard opam/master
        git push

-    - second step: copy why3 opam files into it :
+. copy former files:

-      cd packages/why3
-      cp -r <source why3>/opam why3.0.86
+  cp -r packages/why3-base/why3-base-0.85 packages/why3-base/why3-base-0.86
+  cp -r packages/why3/why3-0.85 packages/why3/why3-0.86

-    - second step:
+. update packages/why3-base/why3-base-0.86/url:
+  url and checksum of why-0.86.tar.gz obtained via

-      opam repository add local <...>/opam-repository
-      opam install why3
-      (* test it, e.g.
-         cp example/quicksort.mlw ~/tmp
-         why3 ide ~/tmp/quicksort.mlw *)
-      opam remove why3
-      opam repository remove local
+    md5sum distrib/why3-0.86.tar.gz

+. update packages/why3-base/why3-base-0.86/descr if necessary
+. update packages/why3/why3-0.86/descr if necessary
+. update packages/why3-base/why3-base-0.86/opam with correct dependencies and such
+. update packages/why3/why3-0.86/opam with correct dependencies and such
+  (at least the dependency on why3-base should be fixed)
+
+* test the OPAM package (requires opam 1.2)
+    opam pin why3 ./.git
+    opam install why3

 * make a pull request on OPAM

@@ -322,12 +346,18 @@ DONE * sauvegarde de la configuration : à quel endroit dans l'IDE ?
  git push
  sur github: creer un pull request

+* inform Jerry James <loganjerry@gmail.com> so that he can produce the
+  Fedora package
+
 * produce the Why3 part of Toccata gallery
-  -> add also a tar.gz and a ZIP file of it (this is done by doing
-  "make gallery-files" in the sources of the Toccata web pages)
-* Announce the distrib
- - What to put in the announcement: see New Features above
-* The next commit : add +git to the version in file Version
+  (TODO: add the procedure here)
+  add also a tar.gz and a ZIP file of it: this is done by doing
+  "make gallery-files" in the sources of the Toccata web pages
+
+* Once the OPAM package is pulled in the main OPAM repository: a
+  nnounce the distrib
+  What to put in the announcement: see New Features above
+


 ==================== Roadmap for release 0.85 ========================

--- a/Version
+++ b/Version
 # Why version
-VERSION=0.85+git
-
+VERSION=0.86+git
--- a/configure.in
+++ b/configure.in
@@ -111,7 +111,7 @@ AC_ARG_ENABLE(doc,
    enable_doc=yes)

 AC_ARG_ENABLE(html-doc,
-    AS_HELP_STRING([--enable-html-doc], [do not build HTML documentation]),,
+    AS_HELP_STRING([--disable-html-doc], [do not build HTML documentation]),,
    enable_html_doc=yes)

 # Experimental Jessie3 Frama-C plugin, disabled by default
@@ -171,8 +171,8 @@ OCAMLVERSION=`$OCAMLC -v | sed -n -e 's|.*version* *\(.*\)$|\1|p' `
 echo "ocaml version is $OCAMLVERSION"

 case "$OCAMLVERSION" in
-  0.*|1.*|2.*|3.*|4.00.0)
-        AC_MSG_ERROR(You need Objective Caml 4.00.1 or higher);;
+  0.*|1.*|2.*|3.*|4.00.*)
+        AC_MSG_ERROR(You need Objective Caml 4.01.0 or higher);;
 esac

 # Ocaml library path

--- a/doc/manual.tex
+++ b/doc/manual.tex
@@ -108,7 +108,7 @@
 %BEGIN LATEX
 \begin{LARGE}
 %END LATEX
-  Version \whyversion{}, September 2014
+  Version \whyversion{}, May 2015
 %BEGIN LATEX
 \end{LARGE}
 %END LATEX
@@ -141,20 +141,20 @@ $^2$ Inria Saclay -- \^Ile-de-France, Palaiseau, F-91120
 \bigskip
 %END LATEX

-  \textcopyright 2010-2014 University Paris-Sud, CNRS, Inria
+  \textcopyright 2010-2015 University Paris-Sud, CNRS, Inria

 \urldef{\urlutcat}{\url}{http://frama-c.com/u3cat/}
 \urldef{\urlhilite}{\url}{http://www.open-do.org/projects/hi-lite/}
 \urldef{\urlbware}{\url}{http://bware.lri.fr/}
+\urldef{\urlproofinuse}{\url}{http://www.spark-2014.org/proofinuse}

 This work has been partly supported by the `\ahref{\urlutcat}{U3CAT}'
 national ANR project (ANR-08-SEGI-021-08\begin{latexonly},
-  \urlutcat\end{latexonly}), the `\ahref{\urlhilite}{Hi-Lite}'
+  \urlutcat\end{latexonly}) ; the `\ahref{\urlhilite}{Hi-Lite}'
 \begin{latexonly}(\urlhilite)\end{latexonly} FUI project of the
-System@tic competitivity cluster, and the `\ahref{\urlbware}{BWare}'
+System@tic competitivity cluster ; the `\ahref{\urlbware}{BWare}'
 ANR project (ANR-12-INSE-0010\begin{latexonly},
-  \urlbware\end{latexonly}).
-
+  \urlbware\end{latexonly}) ; and the \ahref{\urlproofinuse}{Joint Laboratory ProofInUse} (ANR-13-LAB3-0007\begin{latexonly}, \urlproofinuse\end{latexonly})
 \end{flushleft}
 \end{center}

@@ -265,7 +265,7 @@ Thi-Minh-Tuyen Nguyen, Asma Tafat, Piotr Trojanek.

 \section{Release Notes for version 0.80: syntax changes w.r.t. 0.73}

-The syntax of \whyml programs changed in release 0.80. 
+The syntax of \whyml programs changed in release 0.80.
 The table in Figure~\ref{fig:syntax080} summarizes the changes.

 \begin{figure}[thbp]

--- a/drivers/alt_ergo_common.drv
+++ b/drivers/alt_ergo_common.drv
@@ -9,7 +9,7 @@ valid "Valid"
 invalid "Invalid"
 unknown "I don't know" ""
 timeout "Timeout"
-stepslimitexceeded "Steps limit reached"
+steplimitexceeded "Steps limit reached"
 outofmemory "Fatal error: out of memory"
 outofmemory "Fatal error: exception Stack_overflow"
 fail "typing error:\\(.*\\)$" "Failure : File generation error : \\1"

--- a/drivers/cvc4.drv
+++ b/drivers/cvc4.drv
@@ -32,8 +32,8 @@ timeout "interrupted by timeout"
 (** Extra theories supported by CVC4 *)

 (* Disabled:
-   CVC4 division seems to be neither the Euclidean one, nor the Computer one
-
+   CVC4 seems less efficient with its built-in implementation than
+   with the axiomatic version
 theory int.EuclideanDivision
   syntax function div "(div %1 %2)"
   syntax function mod "(mod %1 %2)"
@@ -42,13 +42,4 @@ theory int.EuclideanDivision
   remove prop Mod_1
   remove prop Div_1
 end
-
-theory int.ComputerDivision
-   syntax function div "(div %1 %2)"
-   syntax function mod "(mod %1 %2)"
-   remove prop Mod_bound
-   remove prop Div_mod
-   remove prop Mod_1
-   remove prop Div_1
-end
 *)
--- a/drivers/cvc4_14.drv
+++ b/drivers/cvc4_14.drv
@@ -18,10 +18,13 @@ import "discrimination.gen"

 transformation "inline_trivial"
 transformation "eliminate_builtin"
-(* temporarily disabled: too much experimental
 transformation "detect_polymorphism"
+transformation "eliminate_definition"
+(* We could keep more definitions by using
+   transformation "eliminate_definition_if_poly"
+   instead, but some proofs are lost
+   (examples/logic/triangle_inequality.why)
 *)
-transformation "eliminate_definition_if_poly"
 transformation "eliminate_inductive"
 transformation "eliminate_algebraic_if_poly"
 transformation "eliminate_epsilon"
@@ -37,14 +40,18 @@ transformation "encoding_smt_if_poly"
 outofmemory "(error \".*out of memory\")\\|Cannot allocate memory"
 timeout "interrupted by timeout"
 steps "smt::SmtEngine::resourceUnitsUsed, \\([0-9]+.?[0-9]*\\)" 1
-stepslimitexceeded "??"
-
+(**
+Unfortunately, there is no specific output message when CVC4 reaches its resource limit
+steplimitexceeded "??"
+*)

 (** Extra theories supported by CVC4 *)

 (* Disabled:
-   CVC4 division seems to be neither the Euclidean one, nor the Computer one
-
+   CVC4 seems less efficient with its built-in implementation than
+   with the axiomatic version
+*)
+(*
 theory int.EuclideanDivision
   syntax function div "(div %1 %2)"
   syntax function mod "(mod %1 %2)"
@@ -53,15 +60,6 @@ theory int.EuclideanDivision
   remove prop Mod_1
   remove prop Div_1
 end
-
-theory int.ComputerDivision
-   syntax function div "(div %1 %2)"
-   syntax function mod "(mod %1 %2)"
-   remove prop Mod_bound
-   remove prop Div_mod
-   remove prop Mod_1
-   remove prop Div_1
-end
 *)

 import "cvc4_bv.gen"
--- a/drivers/cvc4_15.drv
+++ b/drivers/cvc4_15.drv
@@ -51,8 +51,10 @@ transformation "encoding_smt_if_poly"
 outofmemory "(error \".*out of memory\")\\|Cannot allocate memory"
 timeout "interrupted by timeout"
 steps "smt::SmtEngine::resourceUnitsUsed, \\([0-9]+.?[0-9]*\\)" 1
-stepslimitexceeded "??"
-
+(**
+Unfortunately, there is no specific output message when CVC4 reaches its resource limit
+steplimitexceeded "??"
+*)

 (** Extra theories supported by CVC4 *)


--- a/drivers/verit.drv
+++ b/drivers/verit.drv
@@ -29,6 +29,17 @@ transformation "simplify_formula"
 transformation "encoding_smt"
 transformation "encoding_sort"

+(*
+disabled: veriT seems more efficient with the axiomatic version
+theory int.EuclideanDivision
+   syntax function div "(div %1 %2)"
+   syntax function mod "(mod %1 %2)"
+   remove prop Mod_bound
+   remove prop Div_mod
+   remove prop Mod_1
+   remove prop Div_1
+end
+*)

 (*
 Local Variables:

--- a/drivers/yices.drv
+++ b/drivers/yices.drv
-import "yices_bare.drv"
+
+(* Why3 driver for Yices (SMT-like syntax) *)
+
+prelude ";;; this is a prelude for Yices "
+
+printer "yices"
+filename "%f-%t-%g.ycs"
+
+valid "\\bunsat\\b"
+unknown "\\bunknown\\b\\|\\bsat\\b" ""
+unknown "feature not supported: non linear problem" "non linear arith"
+time "why3cpulimit time : %s s"
+
+(* À discuter *)
+transformation "inline_trivial"
+
+transformation "eliminate_builtin"
+transformation "eliminate_definition"
+transformation "eliminate_inductive"
+transformation "eliminate_algebraic"
+transformation "eliminate_epsilon"
+
+transformation "simplify_formula"
+(*transformation "simplify_trivial_quantification"*)
+
+transformation "discriminate"
+transformation "encoding_smt"
+
 import "discrimination.gen"

+theory BuiltIn
+  syntax type int   "int"
+  syntax type real  "real"
+  syntax predicate (=)  "(= %1 %2)"
+
+  meta "encoding : kept" type int
+
+  (* could we do this? *)
+  (* meta "eliminate_algebraic" "keep_enums" *)
+end
+
+theory int.Int
+
+  prelude ";;; this is a prelude for Yices integer arithmetic"
+
+  syntax function zero "0"
+  syntax function one  "1"
+
+  syntax function (+)  "(+ %1 %2)"
+  syntax function (-)  "(- %1 %2)"
+  syntax function (*)  "(* %1 %2)"
+  syntax function (-_) "(- 0 %1)"
+
+  syntax predicate (<=) "(<= %1 %2)"
+  syntax predicate (<)  "(< %1 %2)"
+  syntax predicate (>=) "(>= %1 %2)"
+  syntax predicate (>)  "(> %1 %2)"
+
+  remove prop CommutativeGroup.Comm.Comm
+  remove prop CommutativeGroup.Assoc
+  remove prop CommutativeGroup.Unit_def_l
+  remove prop CommutativeGroup.Unit_def_r
+  remove prop CommutativeGroup.Inv_def_l
+  remove prop CommutativeGroup.Inv_def_r
+  remove prop Assoc.Assoc
+  remove prop Mul_distr_l
+  remove prop Mul_distr_r
+  remove prop Comm.Comm
+  remove prop Unitary
+  remove prop Refl
+  remove prop Trans
+  remove prop Antisymm
+  remove prop Total
+  remove prop NonTrivialRing
+  remove prop CompatOrderAdd
+  remove prop ZeroLessOne
+
+end
+
+
+theory real.Real
+
+  prelude ";;; this is a prelude for Yices real arithmetic"
+
+  syntax function zero "0"
+  syntax function one  "1"
+
+  syntax function (+)  "(+ %1 %2)"
+  syntax function (-)  "(- %1 %2)"
+  syntax function (*)  "(* %1 %2)"
+  (* Yices division doesn't accept anything else than constant on
+  denominator so we don't use it (except for constant cf printer) *)
+  (* syntax function (/)  "(/ %1 %2)" *)
+  syntax function (-_) "(- 0 %1)"
+  (* syntax function inv  "(/ 1 %1)" *)
+
+  syntax predicate (<=) "(<= %1 %2)"
+  syntax predicate (<)  "(< %1 %2)"
+  syntax predicate (>=) "(>= %1 %2)"
+  syntax predicate (>)  "(> %1 %2)"
+
+  remove prop CommutativeGroup.Comm.Comm
+  remove prop CommutativeGroup.Assoc
+  remove prop CommutativeGroup.Unit_def_l
+  remove prop CommutativeGroup.Unit_def_r
+  remove prop CommutativeGroup.Inv_def_l
+  remove prop CommutativeGroup.Inv_def_r
+  remove prop Assoc.Assoc
+  remove prop Mul_distr_l
+  remove prop Mul_distr_r
+  remove prop Comm.Comm
+  remove prop Unitary
+  remove prop Inverse
+  remove prop Refl
+  remove prop Trans
+  remove prop Antisymm
+  remove prop Total
+  remove prop NonTrivialRing
+  remove prop CompatOrderAdd
+  remove prop ZeroLessOne
+
+  meta "encoding : kept" type real
+
+end
+
+theory Bool
+   syntax type     bool  "bool"
+   syntax function True  "true"
+   syntax function False "false"
+   meta "encoding : kept" type bool
+end
+theory bool.Bool
+   syntax function andb  "(and %1 %2)"
+   syntax function orb   "(or %1 %2)"
+   syntax function notb  "(not %1)"
+end
+
+
+theory map.Map
+  syntax type map "(-> %1 %2)"
+  meta "encoding : lskept" function get
+  meta "encoding : lskept" function set
+
+  syntax function get    "(%1 %2)"
+  syntax function ([])   "(%1 %2)"
+  syntax function set    "(update %1 (%2) %3)"
+  syntax function ([<-]) "(update %1 (%2) %3)"
+
+
+  meta "encoding : lskept" function const
+
+end
+
 (*
 Local Variables:
 mode: why
 compile-command: "unset LANG; make -C .. bench"
 End:
 *)
-
--- a/drivers/yices_bare.drv
+++ b/drivers/yices_bare.drv
-(* Why driver for SMT syntax *)
-
-prelude ";;; this is a prelude for Yices "
-
-printer "yices"
-filename "%f-%t-%g.ycs"
-
-valid "\\bunsat\\b"
-unknown "\\bunknown\\b\\|\\bsat\\b" ""
-unknown "feature not supported: non linear problem" "non linear arith"
-time "why3cpulimit time : %s s"
-
-(* À discuter *)
-transformation "inline_trivial"
-
-transformation "eliminate_builtin"
-transformation "eliminate_definition"
-transformation "eliminate_inductive"
-transformation "eliminate_algebraic"
-transformation "eliminate_epsilon"
-
-transformation "simplify_formula"
-(*transformation "simplify_trivial_quantification"*)
-
-transformation "discriminate"
-transformation "encoding_smt"
-
-theory BuiltIn
-  syntax type int   "int"
-  syntax type real  "real"
-  syntax predicate (=)  "(= %1 %2)"
-
-  meta "encoding : kept" type int
-
-  (* could we do this? *)
-  (* meta "eliminate_algebraic" "keep_enums" *)
-end
-
-theory int.Int
-
-  prelude ";;; this is a prelude for Yices integer arithmetic"
-
-  syntax function zero "0"
-  syntax function one  "1"
-