diff options
Diffstat (limited to '')
| -rw-r--r-- | tests/hashmap/Hashmap.Properties.fst | 63 |
1 files changed, 32 insertions, 31 deletions
diff --git a/tests/hashmap/Hashmap.Properties.fst b/tests/hashmap/Hashmap.Properties.fst index 2c40f417..bec35dd8 100644 --- a/tests/hashmap/Hashmap.Properties.fst +++ b/tests/hashmap/Hashmap.Properties.fst @@ -1832,7 +1832,7 @@ let assoc_list_inv (#t : Type0) (al : assoc_list t) : Type0 = let disjoint_hm_al_on_key (#t : Type0) (hm : hash_map_slots_s_nes t) (al : assoc_list t) (k : key) : Type0 = - match hash_map_slots_s_find hm k, find (same_key k) al with + match hash_map_slots_s_find hm k, assoc_list_find k al with | Some _, None | None, Some _ | None, None -> True @@ -1849,6 +1849,18 @@ let find_in_union_hm_al | Some b -> Some b | None -> assoc_list_find k al +/// Auxiliary lemma +val for_all_binding_neq_find_lem (#t : Type0) (k : key) (v : t) (al : assoc_list t) : + Lemma (requires (for_all (binding_neq (k,v)) al)) + (ensures (assoc_list_find k al == None)) + +#push-options "--fuel 1" +let rec for_all_binding_neq_find_lem #t k v al = + match al with + | [] -> () + | b :: al' -> for_all_binding_neq_find_lem k v al' +#pop-options + val hash_map_move_elements_s_flat_lem (#t : Type0) (hm : hash_map_slots_s_nes t) (al : assoc_list t) : Lemma @@ -1870,7 +1882,7 @@ val hash_map_move_elements_s_flat_lem (forall (k:key). hash_map_slots_s_find hm' k == find_in_union_hm_al hm al k))) (decreases al) -// TODO: here +#restart-solver #push-options "--z3rlimit 200 --fuel 1" let rec hash_map_move_elements_s_flat_lem #t hm al = match al with @@ -1882,37 +1894,26 @@ let rec hash_map_move_elements_s_flat_lem #t hm al = | Return hm' -> assert(hash_map_slots_s_inv hm'); assert(assoc_list_inv al'); - assume(disjoint_hm_al hm' al'); - assume(hash_map_slots_s_len hm' + length al' <= usize_max); - hash_map_move_elements_s_flat_lem hm' al'; - admit() + let disjoint_lem (k' : key) : + Lemma (disjoint_hm_al_on_key hm' al' k') + [SMTPat (disjoint_hm_al_on_key hm' al' k')] = + if k' = k then + begin + assert(hash_map_slots_s_find hm' k' == Some v); + for_all_binding_neq_find_lem k v al'; + assert(assoc_list_find k' al' == None) + end + else + begin + assert(hash_map_slots_s_find hm' k' == hash_map_slots_s_find hm k'); + assert(assoc_list_find k' al' == assoc_list_find k' al) + end + in + assert(disjoint_hm_al hm' al'); + assert(hash_map_slots_s_len hm' + length al' <= usize_max); + hash_map_move_elements_s_flat_lem hm' al' #pop-options -val hash_map_insert_no_resize_s_lem - (#t : Type0) (hm : hash_map_slots_s_nes t) - (key : usize) (value : t) : - Lemma - (requires ( - hash_map_slots_s_inv hm)) - (ensures ( - match hash_map_insert_no_resize_s hm key value with - | Fail -> - // Can fail only if we need to create a new binding in - // an already saturated map - hash_map_slots_s_len hm = usize_max /\ - None? (hash_map_slots_s_find hm key) - | Return hm' -> - // The invariant is preserved - hash_map_slots_s_inv hm' /\ - // [key] maps to [value] - hash_map_slots_s_find hm' key == Some value /\ - // The other bindings are preserved - (forall k'. k' <> key ==> hash_map_slots_s_find hm' k' == hash_map_slots_s_find hm k') /\ - // The length is incremented, iff we inserted a new key - (match hash_map_slots_s_find hm key with - | None -> hash_map_slots_s_len hm' = hash_map_slots_s_len hm + 1 - | Some _ -> hash_map_slots_s_len hm' = hash_map_slots_s_len hm))) - (* let rec hash_map_move_elements_s_flat (#t : Type0) (ntable : hash_map_slots_s_nes t) |