Robert Allan James
9d178e0efe
17 of 23 words fully modelled (Q.+/-/*//, Q.ABS/NEG, Q.FROM-INT/TO-INT, Q.1/0/SCALE, Q.=/</>/0=, Q.MAX/MIN), reusing q48_add/q48_mul/q48_div/ q48_from_u64/q48_to_u64 already in StarForth_Q48_16.thy and cell_abs (Q.ABS's raw sign-bit test is bit-for-bit cell_abs's `n <s 0`). Added q48_sub there alongside, the one missing arithmetic primitive. Q.LOG/EXP/SQRT/SIN/COS deferred (same transcendental-approximation class already excluded from the sweep at q48_16_words.c). Q.PRINT deferred (stdout only). Finding: every word in this file pops/pushes via the VM_POP/VM_PUSH macros, which resolve to completely unchecked vm_pop_fast/vm_push_fast when STARFORTH_PERFORMANCE is defined -- a build-flag-gated stack-safety hazard distinct from (and broader than) the individual missing-guard instances found elsewhere in the sweep, since it silently disables every guard in the entire file at once. Modelled assuming the safe path. Suite now 52 theories, green.
proof/
Isabelle/HOL theory files providing machine-checkable proofs of determinism and correctness for StarForth. 24 theory files covering all 7 feedback loops, core word categories, and the word-level ACL system.
Running proofs
isabelle build -D proof/
Requires an Isabelle installation. See docs/01-getting-started/DEVELOPER.md.
Theory files
Foundations
| File | Covers |
|---|---|
StarForth_Base.thy |
Base definitions and type system |
StarForth_Correctness.thy |
Overall correctness |
StarForth_Transition.thy |
State transitions |
StarForth_Concurrent.thy |
Concurrency properties |
StarForth_Mutex.thy |
Mutual exclusion |
Physics loops (1–7)
| File | Loop |
|---|---|
StarForth_Loop1_Heat.thy |
Execution heat tracking |
StarForth_Loop2_Window.thy |
Rolling window of truth |
StarForth_Loop3_Decay.thy |
Linear decay |
StarForth_Loop4_Pipeline.thy |
Word transition prediction |
StarForth_Loop5_WinInf.thy |
Window width inference |
StarForth_Loop6_DecayInf.thy |
Decay slope inference |
StarForth_Loop7_Heartrate.thy |
Adaptive heartrate |
Word categories
StarForth_Arithmetic_Words.thy, StarForth_Stack_Words.thy,
StarForth_Logical_Words.thy, StarForth_Memory_Words.thy,
StarForth_Return_Stack_Words.thy, StarForth_Q48_16.thy
ACL system (Phase 6)
| File | Property |
|---|---|
ACL_Pin_Monotone.thy |
Pin is one-way |
ACL_Inherit_Clears_Pin.thy |
Inheritance clears pin |
ACL_TTL_Bounded.thy |
TTL stays within bounds |
ACL_Emergency_Bypass.thy |
Emergency console bypass |
ACL_No_Escalation.thy |
No privilege escalation |
See also
ROOT— Isabelle project manifest- Project root