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feat: Saved prop and ghost var (PR M)#14

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hxrts wants to merge 44 commits intomasterfrom
fork/iris/ghost-primitives
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feat: Saved prop and ghost var (PR M)#14
hxrts wants to merge 44 commits intomasterfrom
fork/iris/ghost-primitives

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@hxrts hxrts commented Feb 5, 2026

Port of iris/base_logic/lib/saved_prop.v and iris/base_logic/lib/ghost_var.v.

  • SavedProp (~294 lines): saved_prop_own, saved_prop_alloc, saved_prop_agree. Agreement theorems use UPred.eq (step-indexed internal equality) with bridge infrastructure in Instances/UPred/InternalEq.lean.
  • GhostVar (~200 lines): ghost_var_alloc, ghost_var_agree, ghost_var_update, ghost_var_persist.

0 sorries.

Independent — no dependencies beyond already-ported agreement and exclusive RAs.

hxrts and others added 30 commits February 1, 2026 22:41
Add the data structures and resource algebras needed for invariant mask
reasoning in the base logic (wsat, fancy updates). Includes CoPset/GSet
types with set operations, CoPsetDisj/GSetDisj disjoint-union CMRAs,
hierarchical namespaces with nclose, and PORTING.md updates.
Add `big_sepL` (list) and `big_sepM` (map) iterated separating
conjunction, specialized from the algebra-level big ops to the BI
separation connective. Includes monoid instance for sep/emp,
computation rules, structural lemmas (mono, app, sep, insert, delete,
lookup_acc, later, singleton, union), iprop notation, and root imports.
Add Auth resource algebra built on the view construction, including:
- authViewRel and IsViewRel instance
- Auth type with ● (authoritative) and ◯ (fragment) notation
- Validity, inclusion, and injectivity lemmas
- Frame-preserving updates: auth_update, auth_update_alloc,
  auth_update_dealloc, auth_update_auth_persist, auth_local_update
- AuthURF/AuthRF functors with URFunctor/RFunctor instances
- View, Heap, and HeapView functor additions
- CMRA infrastructure extensions (opM lemmas, validN helpers)

Based on upstream PR leanprover-community#134 (ahuoguo/AuthCmra).
Stub file for `iris/base_logic/lib/wsat.v` with sorry'd definitions
and theorems: WsatGS, ownI, ownE, ownD, wsat, and all key lemmas
(open/close, allocation, disjointness).
Implement all definitions and theorems for wsat.v: WsatGS, ownI,
ownE, ownD, wsat, open/close lemmas, allocation, and initial world.
Stub file for `iris/base_logic/lib/fancy_updates.v` with sorry'd
definitions and theorems: uPred_fupd, FUpd instance, mask intro,
mono, trans, frame, bupd lifting, plain interaction, and soundness.
Implement all definitions and theorems for fancy_updates.v: uPred_fupd,
FUpd instance, mask intro/mono/trans/frame, bupd lifting, plain
interaction, and soundness. ProofMode instances deferred.
Stub file for `iris/base_logic/lib/invariants.v` with sorry'd
definitions and theorems: own_inv, inv, persistent, alloc, alloc_open,
acc, acc_timeless, alter, iff.
Stub files for Language interface and WeakestPre with sorry'd proofs:
- Language.lean: Language structure, LanguageMixin, LanguageCtx, Atomic,
  Stuckness, reducible/irreducible/stuck, PureStep/PureExec, Step/cfg
- WeakestPre.lean: IrisGS class, wp_pre, wp fixpoint, wp_unfold,
  wp_value_fupd, wp_strong_mono, fupd_wp, wp_fupd, wp_bind,
  wp_bind_inv, wp_mono, wp_frame_l/r, wp_wand, wp_atomic
Fill in all sorry'd proofs for Language and WeakestPre:
- Language.lean: LanguageMixin, LanguageCtx, Atomic, PureStep/PureExec,
  IntoVal/AsVal, reducible/irreducible/stuck lemmas, fill lemmas
- WeakestPre.lean: IrisGS class, wp fixpoint via contractive iteration,
  wp_unfold, wp_value_fupd, wp_strong_mono, fupd_wp, wp_fupd, wp_bind,
  wp_bind_inv, wp_mono, wp_frame_l/r, wp_wand, wp_atomic

Also includes minor fixes to BigOp, FancyUpdates, Wsat, Invariants,
and CancelableInvariants discovered during integration.
Stub file for EctxLanguage with sorry'd proofs:
- EctxLanguageMixin, EctxLanguage structures
- ectx_lang: construct Language from EctxLanguage
- ectx_prim_step inductive (decompose into context + base redex)
- base_reducible, base_irreducible, base_stuck predicates
- sub_redexes_are_values, PureBaseStep
- 22 sorry'd theorems: fill lemmas, base_redex_unique,
  ectx_language_atomic, ectx_lang_ctx, pure_base_step_pure_step
Fill in all sorry'd proofs for EctxLanguage and add missing items:
- base_atomic definition, ectx_step', fill_reducible_no_obs,
  base_prim_reducible_no_obs, base_prim_fill_reducible_no_obs
- All 22+ theorems fully proved, 0 sorries
Stub files for WP lifting lemmas with sorry'd proofs:
- Lifting.lean: wp_lift_step_fupd, wp_lift_step, wp_lift_stuck,
  wp_lift_pure_step_no_fork, wp_lift_atomic_step_fupd,
  wp_lift_atomic_step, wp_lift_pure_det_step_no_fork, wp_lift_pure_stuck
- EctxLifting.lean: wp_lift_base_step_fupd, wp_lift_base_step,
  wp_lift_base_stuck, wp_lift_pure_base_stuck,
  wp_lift_atomic_base_step_fupd, wp_lift_atomic_base_step,
  wp_lift_atomic_base_step_no_fork_fupd, wp_lift_atomic_base_step_no_fork,
  wp_lift_pure_det_base_step_no_fork, wp_lift_pure_det_base_step_no_fork'
Fill in all sorry'd proofs for Lifting and EctxLifting:
- Lifting.lean: wp_lift_step_fupd, wp_lift_step, wp_lift_stuck,
  wp_lift_pure_step_no_fork, wp_lift_atomic_step_fupd,
  wp_lift_atomic_step, wp_lift_pure_det_step_no_fork, wp_lift_pure_stuck
- EctxLifting.lean: all 10 base-step lifting lemmas fully proved

0 sorries across both files.
hxrts added 14 commits February 3, 2026 20:05
Break the monolithic Adequacy.lean into focused submodules:
- ThreadPool: thread pool definitions and operations
- WptpHelpersA/B/C: wptp helper lemmas
- FUpd: fancy update lemmas
- WpStep: single-step WP preservation
- WptpStep: thread pool step preservation
- Preservation: n-step preservation theorem
- Adequate: adequacy record and basic lemmas
- StrongAdequacy: strong adequacy theorem
- SimplifiedAdequacy: simplified adequacy interface
- Invariance: state interpretation invariance
Add explicit BIFUpdate/BIFUpdatePlainly instances scoped to WsatGS W,
fix step_fupdN_plain and soundness lemmas to resolve world mismatches,
and simplify preservation/strong adequacy helpers.
Wire up strong adequacy, simplified adequacy, invariance, and progress
theorems. Add `omit` annotations across all adequacy files to suppress
unused section variable warnings for `DecidableEq Positive`,
`FiniteMapLaws Positive M`, and `IrisGS` instances. Remove unused
simp arguments. Build produces zero errors and zero warnings.
Stub definitions and theorems for ghost_map.v and gen_heap.v with sorry
proofs. GhostMap provides authoritative + fragment ownership for ghost
maps; GenHeap provides the language-level points-to connective and meta
data mechanism for physical heaps.
GhostMap.lean: full ghost map library on HeapView CMRA with auth/elem
definitions, validity, agreement, persistence, lookup, insert, delete,
update, and allocation. GenHeap.lean: thin wrapper over GhostMap with
GenHeapGS singleton typeclass. Meta-data infrastructure omitted.
SavedProp.lean: generic saved_anything_own layer with saved_prop_own
specialization. Stubs for alloc, agree, persist, update.
GhostVar.lean: ghost_var predicate on DFrac × Agree carrier.
Stubs for alloc, agree, update, update_2, persist.
All theorems sorry'd pending dfrac_agree algebra infrastructure.
GhostVar.lean: All proofs completed (0 sorry). Implements ghost_var_persistent,
ghost_var_alloc, ghost_var_valid_2, ghost_var_agree, ghost_var_update,
ghost_var_update_2, ghost_var_persist using DFrac×Agree product CMRA.

SavedProp.lean: 9 of 11 theorems proved (2 sorry). Agreement theorems
(saved_anything_agree, saved_prop_agree) blocked on internal equality
infrastructure not yet ported from Coq.
Port minimal internal equality infrastructure (`UPred.eq` bridge lemmas)
and prove `saved_anything_agree` and `saved_prop_agree` — the last two
sorries in SavedProp.lean. Agreement conclusions use `UPred.eq` (step-
indexed internal equality) rather than `pure` equality, matching Coq's
`internal_eq` semantics.
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