[API Coherence] Report for March 1, 2026 - BitVector, Array, Quantifier, Finite Set APIs #8823

2026-03-01T23:20:25Z

github-actions[bot]
bot Mar 1, 2026

Analysis Scope

Previous run: February 24 - Solver APIs, Optimize APIs
This run: BitVector operations, Array theory APIs, Quantifier APIs, Finite Set APIs
Languages analyzed: Java, .NET (C#), C++, Python, TypeScript, OCaml, Go, Rust

🎉 Resolution Status: All 10 Cached Issues RESOLVED!

Great progress since February 24! All previously identified gaps have been addressed:

Resolved Issues:

✅ Java now has toDimacs() - solver_to_dimacs_string
✅ .NET now has ToDimacs()
✅ OCaml now has to_dimacs
✅ Go now has Dimacs()
✅ TypeScript Solver now has translate()
✅ Go Solver now has Translate()
✅ TypeScript Solver now has getProof()
✅ Java Solver now has addSimplifier()
✅ Go Solver now has AddSimplifier()
✅ TypeScript Solver now has registerOnClause()
✅ TypeScript Optimize now has getLower(), getUpper(), fromFile(), unsatCore(), objectives(), reasonUnknown()

These APIs are now consistently available across languages! Thank you to everyone who contributed to improving API coherence.

🔍 New Inconsistencies Found (9 issues)

HIGH PRIORITY (2 issues)

1. Rust: Missing Finite Set APIs entirely

What: Complete finite set theory (Z3_mk_finite_set_*) is missing from Rust bindings

Available in: C, C++, Python, Java, .NET, TypeScript, OCaml, Go
Missing in: Rust (both z3 crate and z3-sys)

Impact: Cannot work with finite sets in Rust - theory completely unavailable

Functions missing:

Z3_mk_finite_set_empty, _singleton, _union, _intersect, _difference
Z3_mk_finite_set_member, _size, _subset
Z3_mk_finite_set_map, _filter

Fix: Add finite set module to z3 crate (9 functions total)

Example (Python has this):

s1 = SetSort(IntSort())
empty = EmptySet(s1)
set1 = SetAdd(empty, IntVal(1))
set2 = SetAdd(empty, IntVal(2))
union = SetUnion(set1, set2)

Verified: 2026-03-01

2. TypeScript, Go, Rust: Missing `Z3_mk_as_array` (array from function)

What: Cannot create array representation from function declaration

Available in: C, C++, Python, Java, .NET, OCaml
Missing in: TypeScript, Go, Rust

Impact: Limits array theory expressiveness - cannot get array representation of lambda/function

C API: Z3_mk_as_array(context, func_decl) -> array

Example use case (Python):

f = Function('f', IntSort(), IntSort())
arr = AsArray(f)  # Create array representation of function f

Fix: Add as_array() method to FuncDecl or Array module

Verified: 2026-03-01

MEDIUM PRIORITY (4 issues)

3. Python, Java, .NET: Missing BitVector Reduction Operators

What: Bitwise reduction operators bvredand/bvredor (reduce all bits to single bit)

Available in: C, C++, TypeScript, OCaml, Go, Rust
Missing in: Python, Java, .NET

Impact: Cannot express "all bits are 1" (redand) or "any bit is 1" (redor) idioms

C API: Z3_mk_bvredand(c, bv), Z3_mk_bvredor(c, bv)

Use case: Check if any/all bits are set in a bitvector

bvredor(x) == 1 means "at least one bit in x is 1"
bvredand(x) == 1 means "all bits in x are 1"

Fix:

Python: Add BvRedAnd() and BvRedOr() functions in z3.py
Java: Add redAnd() and redOr() methods to BitVecExpr class
.NET: Add RedAnd() and RedOr() methods to BitVecExpr class

Verified: 2026-03-01

4. Python, Java, .NET: Missing BitVector NAND/NOR/XNOR

What: Bitwise NAND, NOR, XNOR operators

Available in: C, C++, TypeScript, OCaml, Go, Rust
Missing in: Python, Java, .NET

Impact: Users must manually negate AND/OR/XOR - less idiomatic and less efficient

C API: Z3_mk_bvnand, Z3_mk_bvnor, Z3_mk_bvxnor

Workaround (Python):

# Current: Must manually negate
result = ~(x & y)  # for NAND

# Desired: Direct operator
result = BvNand(x, y)  # cleaner and potentially more efficient

Fix:

Python: Add BvNand(), BvNor(), BvXnor() functions
Java: Add nand(), nor(), xnor() methods to BitVecExpr
.NET: Add Nand(), Nor(), Xnor() methods to BitVecExpr

Verified: 2026-03-01

5. TypeScript: Missing Signed Multiply Overflow Check

What: TypeScript has bvmul_no_overflow but only for unsigned version

Available in: C (both signed/unsigned), C++, Python, Java, .NET, OCaml, Go, Rust
Missing in: TypeScript (missing signed version with is_signed=true)

Impact: Cannot check signed multiplication overflow in TypeScript

C API: Z3_mk_bvmul_no_overflow(c, t1, t2, is_signed=true)

Current TypeScript:

x.mulNoOverflow(y)  // Only unsigned version

Fix: Add second parameter or separate method:

x.mulNoOverflow(y, false)  // unsigned
x.mulNoOverflow(y, true)   // signed
// OR
x.smulNoOverflow(y)  // explicit signed version

Verified: 2026-03-01

6. Go, OCaml: Missing Recursive Function Definitions

What: Cannot define recursive functions (Z3_mk_rec_func_decl + Z3_add_rec_def)

Available in: C, C++, Python, Java, .NET, TypeScript, Rust
Missing in: Go, OCaml

Impact: Cannot model recursive functions like factorial, fibonacci, tree traversals

C API: Z3_mk_rec_func_decl, Z3_add_rec_def

Example (Python has this):

fib = RecFunction('fib', IntSort(), IntSort())
n = Int('n')
AddRecDef(fib, [n], If(n <= 1, n, fib(n-1) + fib(n-2)))

Fix:

Go: Add RecFunc type and MkRecFunc(), AddRecDef() methods
OCaml: Add mk_rec_func_decl and add_rec_def bindings

Verified: 2026-03-01

LOW PRIORITY (3 issues)

7. TypeScript, Go, OCaml: Missing Model.translate()

What: Cannot translate models between contexts

Available in: C, C++, Python, Java, .NET, Rust
Missing in: TypeScript, Go, OCaml

Impact: Limits multi-context workflows where you need to move models between contexts

C API: Z3_model_translate

Fix: Add translate(target: Context) method to Model class

Verified: 2026-03-01

8. OCaml: Missing `optimize_translate` and `solver_cube` in interface

What: Functions exist in implementation (.ml) but not in interface (.mli)

Available in: Implementation file z3.ml
Missing in: Interface file z3.mli

Impact: Functions not accessible to OCaml users (not exported)

Fix: Add function signatures to z3.mli:

val optimize_translate : optimize -> context -> optimize
val solver_cube : solver -> ast list -> ast_vector

Verified: 2026-03-01

9. Rust: Missing Solver/Optimize translate()

What: Cannot translate solvers/optimizers between contexts in Rust

Available in: C, C++, Python, Java, .NET, TypeScript, Go, OCaml
Missing in: Rust (z3 crate high-level API)

Impact: Multi-context solver workflows limited

C API: Z3_solver_translate, Z3_optimize_translate

Note: z3-sys has the FFI binding but z3 crate doesn't expose it in the high-level API

Fix: Add translate() methods to Solver and Optimize structs

Verified: 2026-03-01

📊 Statistics

APIs analyzed this run: BitVector (88 functions sampled), Array (10 functions), Quantifier (6 functions), Finite Sets (9 functions)
Total functions checked: ~120 across 6 API families
Languages fully covered: 8 (Java, .NET, C++, Python, TypeScript, OCaml, Go, Rust)
Previously cached issues resolved: 10 ✅
New inconsistencies found: 9 (2 high, 4 medium, 3 low priority)
Overall progress: ~6/20 API families analyzed (30%)

🎯 Recommendations for Maintainers

Quick Wins (1-2 hours each):

Rust finite sets: Add 9 FFI bindings to z3-sys and wrap in z3 crate
Python/Java/.NET reduction ops: Add bvredand/bvredor wrappers (2 lines each)
Python/Java/.NET NAND/NOR/XNOR: Add 3 bitwise operators per language (6 lines each)
OCaml interface exports: Add 2 function signatures to z3.mli

Medium Effort (3-6 hours each):

Go recursive functions: Implement RecFunc type with CGO bindings
TypeScript/Go/Rust as_array: Add array-from-function conversion
TypeScript/Go Model.translate: Add context translation for models
TypeScript signed multiply overflow: Add is_signed parameter support

Documentation Opportunity:

Create API compatibility matrix showing which features are available in which languages
Add "API Coverage" badge/status to each language binding README
Document patterns for users to check feature availability

🔜 Next Run Preview

The next analysis will focus on:

Floating-point APIs - Comprehensive check of FPA conversions, predicates, operations
String/Sequence APIs - Regex, string operations, sequence theory
Datatype APIs - Constructor/recognizer/accessor completeness

Expected completion: ~50% of total API surface by next run.

AI generated by API Coherence Checker

expires on Mar 8, 2026, 11:20 PM UTC

2026-03-09T00:59:42Z

github-actions[bot]
bot Mar 9, 2026
Author

This discussion was automatically closed because it expired on 2026-03-08T23:20:25.205Z.

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[API Coherence] Report for March 1, 2026 - BitVector, Array, Quantifier, Finite Set APIs #8823

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[API Coherence] Report for March 1, 2026 - BitVector, Array, Quantifier, Finite Set APIs #8823

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github-actions[bot] bot Mar 1, 2026

Analysis Scope

🎉 Resolution Status: All 10 Cached Issues RESOLVED!

Resolved Issues:

🔍 New Inconsistencies Found (9 issues)

HIGH PRIORITY (2 issues)

1. Rust: Missing Finite Set APIs entirely

2. TypeScript, Go, Rust: Missing Z3_mk_as_array (array from function)

MEDIUM PRIORITY (4 issues)

3. Python, Java, .NET: Missing BitVector Reduction Operators

4. Python, Java, .NET: Missing BitVector NAND/NOR/XNOR

5. TypeScript: Missing Signed Multiply Overflow Check

6. Go, OCaml: Missing Recursive Function Definitions

LOW PRIORITY (3 issues)

7. TypeScript, Go, OCaml: Missing Model.translate()

8. OCaml: Missing optimize_translate and solver_cube in interface

9. Rust: Missing Solver/Optimize translate()

📊 Statistics

🎯 Recommendations for Maintainers

Quick Wins (1-2 hours each):

Medium Effort (3-6 hours each):

Documentation Opportunity:

🔜 Next Run Preview

Replies: 1 comment

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github-actions[bot] bot Mar 9, 2026 Author

github-actions[bot]
bot Mar 1, 2026

2. TypeScript, Go, Rust: Missing `Z3_mk_as_array` (array from function)

8. OCaml: Missing `optimize_translate` and `solver_cube` in interface

github-actions[bot]
bot Mar 9, 2026
Author