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IR-306: specify nested integer operand intervals - #362
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Refs IR-306
QSL emits
(x + 1) + 1,x * -1, and-(x + 1)with plain-Integer inner applications. The outer operation directly references those applications; only the outer result is narrowed. The existing scalar oracle therefore treats the inner operand as unbounded even when its leaves have finite ranges.This spec defines a conservative integer interval from independently bounded leaves for add, sub, mul, and negate, with explicit resource limits and typed refusals. It uses that interval for the corresponding Kani argument and preserves the existing rule that a raw application cannot borrow a separate consumer's narrowing bound. Plain-Integer parameters still refuse
RequiresBound.Current QSL output for all three expressions was emitted and admitted by Contract IR in a temporary read-only probe; outer arithmetic lowered with bounded scalar settings. This PR changes only FR-014, FR-015, TC-024, and TC-033.
make specpassed twice, with only the existing FR-017 line-186 warnings; no code tests were run for this spec-only change. The separate CG code implementation and its full gates remain to do.