When a bug can kill, ‘tests pass’ is not a defense.
An insulin pump that can overdose is a weapon. A flight controller that can overspeed is a missile. A braking system with an unhandled edge case is a coffin. BRIK64 doesn’t test for dangerous states. It makes them structurally impossible. Not unlikely. Impossible.
Testing proves bugs exist. It cannot prove they don’t.
DO-178C Level A: $1M+, 6–12 months
Every line needs requirements traceability, MC/DC structural coverage, and independent review. A single bug fix can trigger months of re-certification. Teams freeze code not because it is done, but because they cannot afford to change it.
IEC 62304 Class C: years of lifecycle
Medical device software demands complete documentation of every unit, every integration test, every hazard analysis. A pacemaker with 10,000 lines needs traceability for every single one. Manual processes turn this into decade-long certification cycles.
ISO 26262 ASIL D: unhandled edge cases kill
Every unhandled edge case is a potential fatality. Toyota’s unintended acceleration. Jeep’s remote exploit. Boeing’s MCAS. All of them: unverified code in safety-critical systems. All of them preventable. Not by better testing — by mathematical impossibility.
The compiler is the auditor. The math is the proof.
BRIK64 domain constraints encode physical reality into the type system. Speed: 0–900 km/h. Dose: 0.0–25.0 units. Distance: 0–200 meters. The dangerous value doesn’t get rejected at runtime — it cannot exist in the program.
Domain constraints as physical laws
type Velocity = range[0, 900] is not a validation rule. It is a physical constraint baked into the type system. The compiler propagates it through every operation algebraically — not by checking. Values outside the domain cannot be expressed. The language itself is the safety system.
Exhaustive branch coverage by construction
Match expressions must cover every value in the domain. Not most values. Every value. The compiler rejects programs with uncovered cases before a single test runs. DO-178C calls this MC/DC coverage. BRIK64 makes it the only possible state.
Certification evidence generated, not written
Every compile generates requirements traceability, structural coverage analysis, and formal verification artifacts. The output of brikc certify IS the DO-178C evidence package. What a team of 12 engineers produces in six months, BRIK64 generates in milliseconds.
Φ_c = 1 — the circuit is closed
Every input consumed. Every output produced. Every branch terminated. No undefined states. No paths to nowhere. If one path is missing — the program does not compile. This is what safety certification has always been trying to prove. BRIK64 makes it impossible to prove false.
Every example compiles with Φ_c = 1. No exceptions.
These are not demos. They are certified circuits. Every input produces a valid output. Every dangerous state has been made structurally impossible by the type system.
Flight Controller
type Velocity = range[0, 900]; // km/h
type Altitude = range[0, 15_000]; // meters
type Fuel = range[0, 50_000]; // liters
type Temperature = range[-40, 1200]; // °C
pc flight_check(speed: Velocity, alt: Altitude, fuel: Fuel) {
// Every combination of inputs produces a valid output.
// Φc = 1: the circuit is closed. No undefined behavior.
}Insulin Pump
type Dose = range[0.0, 25.0]; // units
type Glucose = range[20, 600]; // mg/dL
type InfusionRate = range[0.0, 5.0]; // units/hr
pc calculate_dose(glucose: Glucose, weight_kg: range[1, 300]) {
// Overdose is structurally impossible.
// The domain rejects any dose > 25.0 at compile time.
}Autonomous Braking
type Distance = range[0.0, 200.0]; // meters
type Speed = range[0.0, 250.0]; // km/h
type BrakeForce = range[0.0, 1.0]; // 0-100%
pc emergency_brake(dist: Distance, speed: Speed) -> BrakeForce {
match dist {
0.0..5.0 => 1.0, // Full brake
5.0..20.0 => 0.7, // Hard brake
20.0..50.0 => 0.3, // Moderate
_ => 0.0, // No action needed
}
// Exhaustive. Every distance has a response.
}Cobot Safety
type HumanDistance = range[0.0, 10.0]; // meters
type RobotSpeed = range[0.0, 2.0]; // m/s
pc safety_speed(human_dist: HumanDistance) -> RobotSpeed {
match human_dist {
0.0..0.5 => 0.0, // Stop
0.5..1.5 => 0.3, // Crawl
1.5..3.0 => 1.0, // Normal
3.0..10.0 => 2.0, // Full speed
}
// The robot CANNOT hit the human. The circuit prevents it.
}Every standard. Every artifact. By construction.
Manual certification: $1M+ and 6–12 months. BRIK64: automatic, at compile time. Same verification quality. A fraction of the cost. A fraction of the time.
- DO-178C Level A — full traceability, MC/DC structural coverage, and formal verification artifacts. Generated automatically at compile time.
- IEC 62304 Class C — software lifecycle evidence for medical devices. From requirements to verified circuit, with complete audit trail.
- ISO 26262 ASIL D — automotive functional safety. Every hazard encoded as a domain constraint. Every mitigation mathematically enforced.
- ISO 10218 — collaborative robot safety. Speed limits, force limits, proximity detection — all structurally bound at compile time.
Make the dangerous state impossible. Not unlikely.
If it compiles, it’s certified. If it’s dangerous, it doesn’t compile. That’s not a testing strategy. That’s a mathematical guarantee.