---
title: "mlab-tests-vm-state-gate — Mova code model"
description: "Mova code model of mlab/tests/vm.rs: components with their labels, obernants and the model text."
url: "https://groupants.elamur.ai/free/en/mova/mlab/tests/vm.rs.groupant/state-gate.groupant/"
---
Elamur: [Mova](https://md.mova.elamur.ai/free/en/) · [Dictionary](https://md.dictionary.elamur.ai/free/en/) · [Research](https://md.research.elamur.ai/free/en/) · **Groupants**

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# mlab-tests-vm-state-gate

The groupant beside mlab/tests/vm.rs in the Mova repository: what the code computes, what it never does, how to go back from its outputs, its invariants, cost and checks.

## Facts

- **kind:** groupant_fragment
- **status:** partial source bound model
- **source:** [`mlab/tests/vm.rs`](https://github.com/ElamurAI/mova-free/blob/main/mlab/tests/vm.rs)
- **source SHA-256:** `752cb721b2bda77e…`
- **covers:** Parse barrier/runtime partial state and synthetic gate fail-fast checks. (bytes 10511–12157)
- **part of:** [mlab-tests-vm](https://md.groupants.elamur.ai/free/en/mova/mlab/tests/vm.rs.groupant/)
- **repository folder:** [`mlab/tests/vm.rs.groupant/state-gate.groupant`](https://github.com/ElamurAI/mova-free/tree/main/mlab/tests/vm.rs.groupant/state-gate.groupant)
- **repository commit:** `855da7bd4a7b`

> **Implementation material.** A Mova code model describes this code at one source revision: partial models, finite checks and their stated scope. It is not a reviewed general exposition, and its labels are shown as written, never raised.

## Components

| component | label | where |
|---|---|---|
| **approximant** | partial | [approximant](#approximant) |
| **ast** | partial | `../syntax.json` |
| **cost** | symbolic source derived | [invariant](#invariant) |
| **descriptant** | present | [descriptant](#descriptant) |
| **invariant** | partial | [invariant](#invariant) |
| **tests** | executed bounded checks | [tests](#tests) |

## Obernants

The typed relations around the forward model: the behaviour complement (what the code never does), the reverse reconstruction (every input compatible with an output) and specialised views.

| id | type | label | where |
|---|---|---|---|
| `behavior_complement` | behavior_complement | partial source derived model | [behavior_complement](#behavior-complement) |
| `reverse_reconstruction` | reverse_reconstruction | partial source derived model | [reverse_reconstruction](#reverse-reconstruction) |
| `parse_fixture` | parse_fixture | partial source derived model | [parse_fixture](#parse-fixture) |
| `runtime_fixture` | runtime_fixture | partial source derived model | [runtime_fixture](#runtime-fixture) |
| `warning_fixture` | warning_fixture | partial source derived model | [warning_fixture](#warning-fixture) |
| `gate_fixture` | gate_fixture | partial source derived model | [gate_fixture](#gate-fixture) |

## Model text


### descriptant

#### mlab-tests-vm-state-gate

Parse barrier/runtime partial state and synthetic gate fail-fast checks.

##### Epoch 2026-10-31

Half-open source bytes [10511,12157); bound by parent source hash and scoped byte hash. Model covers only this fragment; parent composition explains joins.

### approximant

#### Scoped forward relation

Two execution modes retain x7 on parser error, x9 on runtime error; drain output; ordinary warnings off still permits gate warning. Faulty gate stops after first scalar addition.

##### Domain and gap

Source-generated states within resource limits. Categorical relation has no executable percent surrogate.

### invariant

#### Scoped invariant

Incomplete RHS after x8 leaves preexisting x7.

##### Cost

Two engine modes and two tiny gate scenarios; one fault mismatch prevents second scenario execution. No loops in fixtures.

### models

## Scoped typed relations

### behavior_complement

Parser-failure oracle excludes x8; runtime-failure oracle excludes x10; gate-warning oracle excludes silence when ordinary warnings are disabled; faulty gate excludes total2.

### reverse_reconstruction

Assertion pass constrains captured bytes and x only, not every frame/FS effect.

### parse_fixture

Incomplete RHS after x8 leaves preexisting x7.

### runtime_fixture

Missing function after x9 stops before x10.

### warning_fixture

gate_warnings increments and checked warning remains visible.

### gate_fixture

Clean total/same 2/2; faulty 1/0 with first-line5/6.


### tests

#### Evidence scope

Parent selected tests: wave30_bounded_state_and_fallback, wave30_parse_runtime_and_output_state, wave30_synthetic_gate_fail_fast, vm_workspace_is_visible_after_run. This fragment shares parent syntax and finite checks; no separate test count or complete fragment coverage claim. Assertion-control association and unexecuted paths are in parent tests.md and source-test-map.json.