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fix induction command (issue #1141) #1142

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Oct 10, 2024
Merged

fix induction command (issue #1141) #1142

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1 change: 1 addition & 0 deletions src/handle/tactic.ml
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Expand Up @@ -145,6 +145,7 @@ let ind_data : popt -> Env.t -> term -> Sign.ind_data = fun pos env a ->
begin
try
let ind = SymMap.find s !(sign.sign_ind) in
let _, ts = List.cut ts ind.ind_nb_params (*remove parameters*) in
let ctxt = Env.to_ctxt env in
if LibTerm.distinct_vars ctxt (Array.of_list ts) = None
then fatal pos "%a is not applied to distinct variables." sym s
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8 changes: 8 additions & 0 deletions tests/OK/1141.lp
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@@ -0,0 +1,8 @@
require open tests.OK.Set tests.OK.Prop tests.OK.Nat tests.OK.List;

symbol sample_1 (list : 𝕃 nat) : π ⊤ ≔
begin
induction
{ apply ⊤ᵢ }
{ assume x l ih; apply ih }
end;
2 changes: 1 addition & 1 deletion tests/OK/922.lp
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Expand Up @@ -20,5 +20,5 @@ with is0 (_ +1) ↪ false;

opaque symbol s≠0 [n] : π (n +1 ≠ 0) ≔
begin
assume n h; refine ind_eq h (λ n, istrue(is0 n)) top
assume n h; refine ind_eq h (λ n, istrue(is0 n)) ⊤ᵢ
end;
2 changes: 1 addition & 1 deletion tests/OK/Prop.lp
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Expand Up @@ -14,7 +14,7 @@ builtin "P" ≔ π;

constant symbol ⊤ : Prop; // \top

constant symbol top : π ⊤;
constant symbol ⊤ᵢ : π ⊤;

// false

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2 changes: 1 addition & 1 deletion tests/export_raw_dk.sh
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Expand Up @@ -60,7 +60,7 @@ do
# proofs
why3*|tutorial|try|tautologies|rewrite*|remove|natproofs|have|generalize|foo|comment_in_qid|apply|anonymous|admit);;
# "open"
triangular|power-fact|postfix|perf_rw_*|not-eager|nonLeftLinear2|natural|Nat|lpparse2|logic|List|FOL|Eq|doc|Bool|arity_var|arity_diff|922|262_pair_ex_2|215);;
triangular|power-fact|postfix|perf_rw_*|not-eager|nonLeftLinear2|natural|Nat|lpparse2|logic|List|FOL|Eq|doc|Bool|arity_var|arity_diff|922|262_pair_ex_2|215|1141);;
# "inductive"
strictly_positive_*|inductive|989|904|830|341);;
# underscore in query
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