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* theories now get either an assertion from the SAT solver (normalized) or an (dis-)equality between two shared terms that is non-normalized
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* array now only propagates thropugh the equality engine
* assertions in the equality rewriting to ensure eq -> { eq, T, F }
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Adds TheoryQuantifiers and TheoryRewriteRules, QuantifiersEngine, and other infrastructure.
Adds theory instantiators to many theories.
Adds the UF strong solver.
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Also fixed one bv rewrite failure (more to come)
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it was an issue with constants being merged, which influenced explanations of disequalities. when constants are attempted to be merged, equality engine now enters conflict mode immediately
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propagating disequalities between shared terms.
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still doesnt fix the wrong answers thought :(
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are still the AUFBV wrong results, but it seems better.
http://church.cims.nyu.edu/regress-results/compare_jobs.php?job_id=4382&reference_id=4359&p=5
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regressions. New additions:
* areDisequal(x, y) -> areDisequal(x, y, needProof): when asking for a disequality you must say needProof if you will ask for an explanation later.
* propagation of shared dis-equalities (not yet complete, once case missing)
* changes to the theories that use it, authors should check up on the changes
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pushed out for relationships between terms tagged with the same tag. No performance impact.
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- The type of (kind::DIVISION x y) is RealType.
- A reference to util/pseudoboolean.i was removed.
- rec5.cvc is disabled for now. The type of 2 is Integer which is not a subtype of [0..11].
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This fixes bugs 335 and 333.
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Added ITE simplifier - on by default only for QF_LIA benchmarks
Fixed one bug in arrays
Added negate() to node.h - it returns kind == NOT ? kind[0] : kind.notNode()
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* notifications are now through the interface subclass instead of a template
* notifications include constants being merged
* changed contextNotifyObj::notify to contextNotifyObj::contextNotifyPop so it's more descriptive and doesn't clutter methods when subclassed
* sat solver now has explicit methods to make true and false constants
* 0-level literals are removed from explanations of propagations
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Changes include
* fixed term visitor from the bvprop branch
* removed all the warnings from builds -- warnings are there to be noted *NOT* to be used as scribbles
* moved the LogicInfo into the theory constructor
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arrays, fixed bug with equalities between constants in shared terms database
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Also disabled eager lemmas - slows down QF_AX but gets new examples in QF_AUFBV
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- This adds a CleanUp template argument to CDList.
- CDChunkList<T> replaces the CDList specialization for ContextMemoryAllocator.
- CDVector<T> has been simplified and improved.
- The expected performance impact is negligible.
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Dump("foo") << FooCommand(...);
now "dumps" the textual representation of the command (in the current
output language) to a file, IF dumping is on at configure-time, AND the
"muzzle" feature is off, AND the "foo" flag is turned on for the dump
stream during this run.
If it's a portfolio build, the above will also store the command in a
CommandSequence, IF the "foo" flag is turned on for the dump stream
during this run. This is done even if the muzzle is on.
This commit also cleans up some code that used the dump feature (in arrays,
particularly).
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CDSet -> CDHashSet
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solve -> ppAsert
staticLearning -> ppStaticLearn
preprocess -> ppRewrite
SolveStatus -> PPAssertStatus (SOLVE_* -> PP_ASSERT_*)
via Eclipse refactoring magic.
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still write, for example:
#include "expr/node.h"
but public CVC4 headers, upon installation to /usr/include/cvc4 (or wherever),
have such #includes rewritten automatically to:
#include <cvc4/expr/node.h>
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and model gen also.
I also expect this commit to fix bug #273.
No performance change is expected on regressions with this commit, see
http://goedel.cims.nyu.edu/regress-results/compare_jobs.php?job_id=2871&reference_id=2863
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Dumping infrastructure. Can dump preprocessed queries and clauses. Can
also dump queries (for testing with another solver) to see if any conflicts
are missed, T-propagations are missed, all lemmas are T-valid, etc. For a
full list of options see --dump=help.
CUDD building much cleaner.
Documentation and assertion fixes.
Printer improvements, printing of commands in language-defined way, etc.
Typechecker stuff in expr package now autogenerated, no need to manually
edit the expr package when adding a new theory.
CVC3 compatibility layer (builds as libcompat).
SWIG detection and language binding support (infrastructure).
Support for some Z3 extended commands (like datatypes) in SMT-LIBv2 mode
(when not in compliance mode).
Copyright and file headers regenerated.
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* new "well-foundedness" type property (like cardinality) specified in
Theory kinds files; specifies well-foundedness and a ground term
* well-foundedness / finite checks in Datatypes now superseded by type
system isFinite(), isWellFounded(), mkGroundTerm().
* new "RecursionBreaker" template class, a convenient class that keeps
a "seen" trail without you having to pass it around (which is
difficult in cases of mutual recursion) of the idea of passing
around a "seen" trail
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* Type::getCardinality() returns the cardinality for for all types.
Theories give a cardinality in the their kinds file. For
cardinalities that depend on a type argument, a "cardinality
computer" function is named in the kinds file, which takes a
TypeNode and returns its cardinality.
* There's a bitmap for the set of "active theories" in the
TheoryEngine. Theories become "active" when a term that is owned by
them, or whose type is owned by them, is pre-registered (run CVC4
with --verbose to see theory activation). Non-active theories don't
get any calls for check() or propagate() or anything, and if we're
running in single-theory mode, the shared term manager doesn't have
to get involved. This is really important for get() performance
(which can only skimp on walking the entire sub-DAG only if the
theory doesn't require it AND the shared term manager doesn't
require it).
* TheoryEngine now does not call presolve(), registerTerm(),
notifyRestart(), etc., on a Theory if that theory doesn't declare
that property in its kinds file. To avoid coding errors,
mktheorytraits greps the theory header and gives warnings if:
+ the theory appears to declare one of the functions (check,
propagate, etc.) that isn't listed among its kinds file properties
(but probably should be)
+ the theory appears NOT to declare one of the functions listed in
its kinds file properties
* some bounded token stream work
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* Fixed hole in arrays typechecking.
* Fixed "make dist".
* Better ouroborous test, and some printer fixes.
* Continued cleanup in CVC parser, removed some warnings.
* Better output.
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are somewhat disparate but belonged on the same branch because they were
held back from trunk all for the same reason (to keep the trunk stable
for furious bitvector development). Dejan has now given me the go-ahead
for a merge.
=========================================
THIS COMMIT CHANGES THE THEORY INTERFACE!
=========================================
Theory constructors are expected to take an additional "Valuation*"
parameter that each Theory should send along to the base class
constructor. The base class Theory keeps the Valuation* in a
d_valuation field for use by it and by its derived classes.
Theory::getValue() no longer takes a Valuation* (it is expected
to use d_valuation instead). This allows other theory functions
to take advantage of getValue() for debugging or heuristic
purposes.
TODO BEFORE MERGE TO TRUNK:
****implement BitIterator find() in CDAttrHash<bool>.
Specifically:
* Added QF_BV support for SMT-LIB v2.
* Two adjustments to the theory interface as requested by Tim King:
1. As described above.
2. Theories now have const access to the fact queue through base
class functions facts_begin() and facts_end(); useful for
debugging.
* Added an "Asserted" attribute so that theories can check if something
has been asserted or not (and therefore not propagate it). However, this
has been disabled for now, pending more data on the overhead of it, and
pending discussion at the 3/25/2011 meeting.
* Do not define NDEBUG in MiniSat in assertion-enabled builds (so
that MiniSat asserts are evaluated).
* As a result of the new MiniSat assertions, some --incremental
regressions had to be disabled; also, some bitvectors ?!!
* Bug 71 is resolved by adding a specialization for CDAttrHash<> in the
attribute package.
* Fixes for some warnings flagged by clang.
* System tests have arrived! So far mainly infrastructure for having
system tests, but there is a system test aimed at improving code
coverage of the printer package.
* Minor other adjustments to documentation and coding to be more
conformant to CVC4 policy.
Tests have been performed to demonstrate that these changes have no or
negligible effect on performance. In particular, changing the
CDAttrHash<> doesn't have any real effect on performance or memory right
now, since there is only one context-dependent boolean flag (as soon
as another is added, the effect is noticeable but probably still slight).
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caused a number of latent errors in sources and headers to come up. Those are now fixed (by adding "using" or "std::" depending on the context). Took the opportunity to bring many rewriter sources in line with coding conventions.
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dependences; now, if you touch theory_engine.h, only a few things in theory need be recompiled (TheoryEngine, SharedTermManager, .... but no theory implementations), along with the PropEngine and SmtEngine. If you touch a specific theory's .h file, only that theory must be recompiled (along with the TheoryEngine, since it uses traits, and SmtEngine, since it tells the TheoryEngine which theory implementations to use).
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and not yet finalized but I need to put it in to work further with the theory writers. Please check the files that you 'own'. Any comments or discussion is welcome. Further details will be coming in a follow up email later.
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