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17707 commits 63 branches 52 tags 178 MiB
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1270 commits

Author SHA1 Message Date
Nikolaj Bjorner
d1c7ff1a36 add unconstrained elimination for sequences 2023-03-20 17:07:04 +01:00
Nuno Lopes
b9a87e493b minor code simplifications 2023-03-05 19:08:41 +00:00
Nikolaj Bjorner
acd2eaa390 add (disabled) code path to enable nested conjunctions 
for experiments with disabling flat-and-or dependency
 2023-03-01 20:39:39 -08:00
Nikolaj Bjorner
46d37b6e30 fix #6615 
make rewriting exception safe (for cancelation).
The state during restart in smt_context is not exception safe.
 2023-03-01 17:30:07 -08:00
Nikolaj Bjorner
755b517001 fix #6600 
ensure that semantics of last-indexof(t,"") = len(t)
 2023-02-19 14:02:37 -08:00
Nikolaj Bjorner
6454e7fa3f apply rewriting if result of destructive equality resolution is simplified 2023-02-19 11:03:04 -08:00
Nikolaj Bjorner
cb81473260 add destructive equality resolution to the main simplifier. 2023-02-18 17:54:26 -08:00
Nikolaj Bjorner
c0f80f92ba deal with compiler warnings (unused variables etc) 2023-02-18 17:53:37 -08:00
Nikolaj Bjorner
f66a082de9 fix #6595 2023-02-18 14:11:48 -08:00
Ding Fei
828ff98c77
fix tpl instantiation issue for mingw (#6597) 2023-02-17 09:26:45 -08:00
Nikolaj Bjorner
ac068888e7 add trichotomy for sequence comparison. #6586 2023-02-16 08:59:55 -08:00
Nikolaj Bjorner
c2fe76569f remove dependency on bool-rewriter in hoist rewriter 
deal with regression reported in
cac5052685 (commitcomment-100606067)
and unit tests doc.cpp
 2023-02-14 17:48:02 -08:00
Nikolaj Bjorner
102eee77dc patch regressions 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2023-02-12 20:12:01 -08:00
Nikolaj Bjorner
cac5052685 fixes related to #6577 
- enforce elim-and in bool-rewriter when invoking hoisting.
- make cnf tactic more resilient to non-normalized input.
- enable eliminate predicates on ground formulas
 2023-02-12 13:43:44 -08:00
Nikolaj Bjorner
91d6082f2f Move modular interval to interval directory 2023-01-27 17:55:36 -08:00
Nikolaj Bjorner
0f3c56213e move dominator simplifier functionality to rewriter and simplifier, move bv_bounds simplifier functionality to simplifier 2023-01-27 17:11:48 -08:00
Nikolaj Bjorner
4601d1d664 fix #6550 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2023-01-24 03:37:09 -08:00
Nikolaj Bjorner
eb751bec4c fix riscv/aarch/powerpc build warnings 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2023-01-22 23:57:59 -08:00
Nikolaj Bjorner
25b0b1430c move bound_manager to simplifiers, add bound manager to extract_eqs for solve-eqs #6532 2023-01-12 12:42:28 -08:00
Nikolaj Bjorner
d415f07386 memory leak on proof justifications 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2023-01-10 18:58:25 -08:00
Nikolaj Bjorner
30e0f78c16 remove exit 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2023-01-09 10:00:36 -08:00
Nikolaj Bjorner
49ee570b09 split into separate function 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2023-01-08 19:16:46 -08:00
Nuno Lopes
5899fe3cea
Add rewrite for array selects of chain of stores of a same value (#6526) 
* Add rewrite for array selects of chain of stores of a same value

Example:
```smt
(declare-fun mem () (Array (_ BitVec 4) (_ BitVec 4)))
(declare-const x (_ BitVec 4))
(declare-const y (_ BitVec 4))
; simplifies to #x1
(simplify (select (store (store (store mem #x1 #x1) y #x1) x #x1) #x1))
```

* Update array_rewriter.cpp

* Update array_rewriter.cpp
 2023-01-08 19:09:01 -08:00
Nikolaj Bjorner
61b90e64b2 disable new simplifcation for multiplier until really understood 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2023-01-08 14:17:49 -08:00
Nikolaj Bjorner
fcea32344e add missing tactic descriptions, add rewrite for tamagochi 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2023-01-08 13:32:26 -08:00
Nuno Lopes
e448191212 array rewriter: expand select of store with const array into an ite 
This:
(simplify (select (store ((as const (Array (_ BitVec 4) (_ BitVec 4))) #x0) x #x1) y))
=>
(ite (= x y) #x1 #x0)
 2023-01-03 11:08:57 +00:00
Nuno Lopes
e508ef17f6 fix Alive bug #875: bit blaster not respecting soft memory limit 2023-01-03 10:39:28 +00:00
Nikolaj Bjorner
527fb18366 add doc for card2bv 2022-12-11 09:51:49 -08:00
Nikolaj Bjorner
87095950cb fix #6477 2022-12-04 13:02:45 -08:00
Nikolaj Bjorner
ead2a46a88 build 2022-12-04 10:38:24 -08:00
Nikolaj Bjorner
9b58135876 try to fix linux builds 2022-12-04 09:55:31 -08:00
Nikolaj Bjorner
0f7bebcbed try big M for linux build 2022-12-04 09:49:32 -08:00
Nikolaj Bjorner
1974c224ab add demodulator simplifier 
refactor demodulator-rewriter a bit to separate reusable features.
 2022-12-04 09:39:28 -08:00
Nikolaj Bjorner
9acbfa3923 move it into substitution to handle dependencies 2022-12-04 06:23:32 -08:00
Nikolaj Bjorner
3d7bd40a87 a round of cleanup 2022-12-04 06:07:45 -08:00
Nikolaj Bjorner
d218083145 The demodulator doesn't produce proofs so remove code path that depends it does. 2022-12-04 04:48:48 -08:00
Nikolaj Bjorner
7fe6787748 ufbv-rewriter is really a demodulator rewriter and does not reference ufbv 
so moving first the rewriter into place of other rewriters
 2022-12-04 04:44:02 -08:00
Nikolaj Bjorner
79e6d4e32d tune and debug elim-unconstrained (v2 - for simplifiers infrastructure) 2022-12-04 03:53:31 -08:00
Nikolaj Bjorner
cf7bba6288 use ast_manager as an attribute 2022-12-04 03:53:30 -08:00
Nikolaj Bjorner
b084821a0c wip - dependent expr simpliifer 
- simplify iterator over current indices
- add more simplifiers used by asserted_formulas
- improve diagnostics printing
 2022-11-30 13:41:40 +07:00
Nikolaj Bjorner
caf204ab95 hoist macro-replacer as shared utility, update eliminate-predicates and model reconstruction 2022-11-24 19:45:51 +07:00
Nikolaj Bjorner
eceeb295fc fix #6457 2022-11-24 14:41:50 +07:00
Nikolaj Bjorner
9a2693bb72 tune euf-completion 2022-11-23 16:39:20 +07:00
Nikolaj Bjorner
22353c2d6c new core perf - add merge_tf and enable_cgc distinction 
perf fix for propagation behavior for equalities in the new core.
The old behavior was not to allow congruence closure on equalities.
The new behavior is to just not allow merging tf with equalities unless they appear somewhere in a foreign context (not under a Boolean operator)

The change re-surfaces merge_tf and enable_cgc distinction from the old core.
They can both be turned on or off.

merge_enabled renamed to cgc_enabled

The change is highly likely to introduce regressions in the new core.

Change propagation of literals from congruence:
- track antecedent enode. There are four ways to propagate
literals from the egraph.
- the literal is an equality and the two arguments are congruent
- the antecedent is merged with node n and the antecedent has a Boolean variable assignment.
- the antecedent is true or false, they are merged.
- the merge_tf flag is toggled to true but the node n has not been merged with true/false
 2022-11-23 11:37:24 +07:00
Nikolaj Bjorner
ba68652c72 add destructive equality resolution to existentials 2022-11-19 18:43:46 +07:00
Nikolaj Bjorner
98fc8c99db add shortcut to equality mk utility 2022-11-16 03:47:01 -08:00
Nikolaj Bjorner
255414f4a9 fix regression crash 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-11-15 11:20:12 -08:00
Nikolaj Bjorner
9845c33236 add shortcuts in rewriter, eliminate redundancies in dependent_expr tactic 2022-11-15 09:13:13 -08:00
Nikolaj Bjorner
3a37cfca30 switch to solve_eqs2 tactic 2022-11-08 12:23:36 -08:00
Nikolaj Bjorner
f769e2f1f6 have bool rewriter use flat_and_or, and integrate hoist rewriter 2022-11-08 12:21:50 -08:00