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20078 commits 55 branches 53 tags 187 MiB
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17 commits

Author SHA1 Message Date
Nikolaj Bjorner
d0e20e44ff booyah 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2020-07-04 15:56:30 -07:00
Arie Gurfinkel
c5fb1c1223 Use vector instead of a hashtable to represent a set 2018-06-14 16:08:51 -07:00
Arie Gurfinkel
e84ca25f05 Check whether one proof node is an ancestor of another on-demand 
Instead of pre-computing sets
 2018-06-14 16:08:51 -07:00
Arie Gurfinkel
a40e0dce0c proof_utils: use expr_mark instead of hashtable 2018-06-14 16:08:51 -07:00
Arie Gurfinkel
2a6b694373 Imrove hypothesis_reducer 2018-06-14 16:08:51 -07:00
Arie Gurfinkel
5a6bd5e782 hypothesis_reducer: worked around propositional literals 
propositional formulas (disjunctions) can appear as literals.  This
makes it tricky to recognize whether a formula is a unit clause when
re-building unit resolution.

Added work-around that identifies whether a formula is a literal based
on its appearance in previous unit resolution step.
 2018-06-14 16:08:48 -07:00
Arie Gurfinkel
fd13eb9e0e Final cleanup of hypothesis_reducer 2018-06-14 16:08:48 -07:00
Arie Gurfinkel
8d312f9d1f Cleanup of hypothesis_reducer 2018-06-14 16:08:48 -07:00
Arie Gurfinkel
2db38fedd6 Cleanup of theory_axiom_reducer proof trasfomation 2018-06-14 16:08:48 -07:00
Arie Gurfinkel
07ad67ebad Move proof dot printing into iuc_proof 2018-06-14 16:08:48 -07:00
Arie Gurfinkel
3bc3b00fdd Post merge compile fixes 2018-06-14 16:08:48 -07:00
Bernhard Gleiss
295d16bfae Rewrite hyp-reducer 
This is a new version that conceptually addresses the bugs in
all previous version. However, it had a hard-to-debug memory
corruption. The bug appeared only in optimized compilation under
Linux with GCC.

This code is suspect and should be reviewed and further tested
 2018-06-14 16:08:48 -07:00
Bernhard Gleiss
de31b07008 arith-theory-axiom reducer to handle arithmetic axioms 2018-06-14 16:08:48 -07:00
Arie Gurfinkel
56114a5f6d Refactor iuc_proof as a separate class 
This also adds DOT printing support to interpolating proofs
(color for different parts)

iuc_proof is a proof used for IUC computation
 2018-06-14 16:08:48 -07:00
Nikolaj Bjorner
d67f3c1466 create proofs folder, move proof-post-order utility to proofs directory, fix regression with proofs 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2017-10-24 03:08:56 -07:00
Arie Gurfinkel
25c6480e6e updated include directives 2017-07-31 23:16:42 -04:00
Arie Gurfinkel
5b9bf74787 Spacer engine for HORN logic 
The algorithms implemented in the engine are described in the following papers

Anvesh Komuravelli, Nikolaj Bjørner, Arie Gurfinkel, Kenneth L. McMillan:
Compositional Verification of Procedural Programs using Horn Clauses over Integers and Arrays. FMCAD 2015: 89-96

Nikolaj Bjørner, Arie Gurfinkel:
Property Directed Polyhedral Abstraction. VMCAI 2015: 263-281

Anvesh Komuravelli, Arie Gurfinkel, Sagar Chaki:
SMT-Based Model Checking for Recursive Programs. CAV 2014: 17-34
 2017-07-31 17:02:29 -04:00