cprover: add external SMT2 solver backend (--smt2-solver)#9068
Open
tautschnig wants to merge 1 commit into
Open
cprover: add external SMT2 solver backend (--smt2-solver)#9068tautschnig wants to merge 1 commit into
tautschnig wants to merge 1 commit into
Conversation
There was a problem hiding this comment.
Pull request overview
Note
Copilot was unable to run its full agentic suite in this review.
Adds an external SMT-LIBv2 (SMT2) solver backend that can be selected via a new --smt2-solver command-line option, enabling cprover to pipe constraints to an external solver (e.g., z3) instead of the built-in SAT backend.
Changes:
- Introduces
cprover_smt2_dectas an SMT2 decision procedure configured for cprover’s state encoding. - Adds
--smt2-solveroption and plumbs the configured solver binary throughsolver_optionst. - Updates inductiveness subsumption checks and counterexample search to use the external SMT2 solver when configured.
Reviewed changes
Copilot reviewed 7 out of 7 changed files in this pull request and generated 5 comments.
Show a summary per file
| File | Description |
|---|---|
| src/cprover/solver.h | Adds solver_optionst::smt2_solver_binary to configure external SMT2 solver usage. |
| src/cprover/inductiveness.cpp | Routes subsumption and counterexample logic to either external SMT2 or built-in SAT. |
| src/cprover/cprover_smt2_dec.h | Adds a configured SMT2 decision procedure specialization for cprover. |
| src/cprover/cprover_parse_options.h | Registers new CLI option --smt2-solver. |
| src/cprover/cprover_parse_options.cpp | Parses and stores --smt2-solver into solver options. |
| src/cprover/counterexample_found.h | Extends API to pass SMT2 solver binary + adds generic show_assignment overload. |
| src/cprover/counterexample_found.cpp | Adds external SMT2 solver path for counterexample search. |
💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.
Comment on lines
228
to
238
| switch(solver()) | ||
| { | ||
| case decision_proceduret::resultt::D_SATISFIABLE: | ||
| if(verbose) | ||
| show_assignment(solver); | ||
| return counterexample(frames, work, solver, axioms, ns); | ||
| case decision_proceduret::resultt::D_UNSATISFIABLE: | ||
| break; | ||
| case decision_proceduret::resultt::D_ERROR: | ||
| if(!smt2_solver_binary.empty()) | ||
| break; // conservatively treat as no counterexample found | ||
| throw "error reported by solver"; | ||
| } |
Comment on lines
+76
to
+79
| decision_proceduret &solver = | ||
| smt2_solver_binary.empty() | ||
| ? static_cast<decision_proceduret &>(*bv_ptr) | ||
| : static_cast<decision_proceduret &>(*solver_ptr); |
Comment on lines
+199
to
+218
| std::unique_ptr<decision_proceduret> solver_ptr; | ||
| std::unique_ptr<satcheckt> satcheck_ptr; | ||
| std::unique_ptr<bv_pointers_widet> bv_ptr; | ||
|
|
||
| if(!smt2_solver_binary.empty()) | ||
| { | ||
| solver_ptr = std::make_unique<cprover_smt2_dect>( | ||
| ns, smt2_solver_binary, message_handler); | ||
| } | ||
| else | ||
| { | ||
| satcheck_ptr = std::make_unique<satcheckt>(message_handler); | ||
| bv_ptr = std::make_unique<bv_pointers_widet>( | ||
| ns, *satcheck_ptr, message_handler); | ||
| } | ||
|
|
||
| decision_proceduret &solver = | ||
| smt2_solver_binary.empty() | ||
| ? static_cast<decision_proceduret &>(*bv_ptr) | ||
| : static_cast<decision_proceduret &>(*solver_ptr); |
Comment on lines
+10
to
+21
| #include <solvers/smt2/smt2_dec.h> | ||
|
|
||
| /// SMT2 decision procedure configured for cprover's state encoding. | ||
| /// Uses datatypes for structs (instead of bitvector flattening) to | ||
| /// support mathematical types (integer, real, string). | ||
| class cprover_smt2_dect : public smt2_dect | ||
| { | ||
| public: | ||
| cprover_smt2_dect( | ||
| const namespacet &_ns, | ||
| const std::string &_solver_binary, | ||
| message_handlert &_message_handler) |
| "(safety)(no-safety)(no-assertions)" \ | ||
| "(contract):" \ | ||
| "(solve)(unwind):(trace)" \ | ||
| "(smt2-solver):" \ |
Codecov Report❌ Patch coverage is
Additional details and impacted files@@ Coverage Diff @@
## develop #9068 +/- ##
===========================================
- Coverage 80.68% 80.68% -0.01%
===========================================
Files 1714 1716 +2
Lines 189501 189535 +34
Branches 73 73
===========================================
+ Hits 152902 152921 +19
- Misses 36599 36614 +15 ☔ View full report in Codecov by Harness. 🚀 New features to boost your workflow:
|
Add cprover_smt2_dect (a decision_proceduret that pipes constraints to an external SMT2 solver such as z3), a --smt2-solver command-line option, the solver_optionst::smt2_solver_binary field, and the plumbing in the inductiveness check and counterexample search to use the external solver when configured (falling back to the built-in SAT backend otherwise). Co-authored-by: Kiro <kiro-agent@users.noreply.github.com>
tautschnig
force-pushed
the
strata/cprover-smt2-solver-backend
branch
from
9530233 to
6f47377
Compare
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Add cprover_smt2_dect (a decision_proceduret that pipes constraints to an external SMT2 solver such as z3), a --smt2-solver command-line option, the solver_optionst::smt2_solver_binary field, and the plumbing in the inductiveness check and counterexample search to use the external solver when configured (falling back to the built-in SAT backend otherwise).