Isabelle2021-1 simplifies `a << Suc 0` too eagerly, so we add simp
rules to compensate for new forms of goals. Removing the too-eager simp
rules would be less stable against theory merge.
Signed-off-by: Gerwin Klein <gerwin.klein@proofcraft.systems>
More controlled simpset setup, so we don't get warnings if we have
bit_simps in the simpset already.
Signed-off-by: Gerwin Klein <gerwin.klein@proofcraft.systems>
The benefit of the wpx method is not worth the maintenance effort.
There are still a few instances of wpx left in AInvs, which will have
to be fixed later.
We are keeping the wps method from the same file (WPEx.thy), because
that is used more widely and does not break with Isabelle2021-1
Signed-off-by: Gerwin Klein <gerwin.klein@proofcraft.systems>
The repeat_unless method allows one to repeatedly apply some method
until some other method can be applied. This should be particularly
useful in Hoare triple proofs that use the forward-reasoning style
This commit was cherry-picked from the rt branch.
Signed-off-by: Michael McInerney <Michael.McInerney@data61.csiro.au>
The `value_type` top-level command allows evaluating a term down to a
natural number, and using that number to define an enumerated type, as
well as (optionally) a constant definition.
Co-authored-by: Rafal Kolanski <rafal.kolanski@proofcraft.systems>
Signed-off-by: Gerwin Klein <gerwin.klein@proofcraft.systems>
The theory import order is important for name shadowing, including
default rules for induction and cases. This commit makes sure we
get the Word_Lib version by default, not the HOL.Word version.
Signed-off-by: Gerwin Klein <gerwin.klein@proofcraft.systems>
The syntax OR for nondeterministic choice between two executions now
conflicts with the OR bit operation from the Isabelle distribution.
Since it was almost unused anyway, we remove it entirely and use only
the \<sqinter> symbol instead.
Signed-off-by: Gerwin Klein <gerwin.klein@proofcraft.systems>
Terms of the form "of_nat x = 0" get rewritten into
"~x dvd 2^LENGTH('a)", which is almost never what you want for
concrete word sizes. This bundle makes it easy to remove those rules
locally.
Signed-off-by: Gerwin Klein <gerwin.klein@proofcraft.systems>
Isabelle2021 uses lualatex by default, which chokes on the pdfglyph
setup. On the upside, it seems to be supporting the correct code for
searchable ligatures already by default, so we can remove this setup.
Signed-off-by: Gerwin Klein <kleing@unsw.edu.au>
The @{here} antiquotation position leads to overlapping position
information which confuses the Isabelle session manager.
Signed-off-by: Gerwin Klein <gerwin.klein@data61.csiro.au>
This mostly refactors ML code to avoid non-exhaustive matches, restore
the (op infix) syntax that got lost in a previous Isabelle update, and
removes some unused functions/parameters.
Signed-off-by: Gerwin Klein <gerwin.klein@data61.csiro.au>
Word_32 and Word_64 shouldn't be included at the same time, they
both define default word_size and other notions. This commit refactors
them to be usable independently and also makes the type names available
independently from all of the Word_x theories.
Signed-off-by: Gerwin Klein <gerwin.klein@data61.csiro.au>
This includes a tweak to Word_Lib to simplify ucast(-1) which
is now a term that occurs more often.
Signed-off-by: Gerwin Klein <gerwin.klein@data61.csiro.au>
Gerwin Klein
Michael McInerney
Michael McInerney
Ryan Barry
Corey Lewis
Gerwin Klein
Gerwin Klein
Florian Haftmann