Library Waterproof.Automation.Hints

Require Import Ltac2.Ltac2.

Require Import Arith.PeanoNat.
Require Import Classical_Pred_Type.
Require Import Lia.
Require Import Lra.
Require Import Logic.ClassicalEpsilon.
Require Import Reals.Reals.
Require Import Reals.Rdefinitions.
Require Import Sets.Classical_sets.
Require Import Sets.Ensembles.

Require Import Chains.
Require Import Libs.Negation.
Require Import Libs.Reals.
Require Import Libs.Logic.InformativeEpsilon.
Require Import Libs.Logic.ConstructiveLogic.

Waterproof core

Create HintDb wp_core.

  #[export] Hint Resolve f_equal : wp_core.
  #[export] Hint Resolve f_equal2 : wp_core.
  #[export] Hint Extern 2 => progress ltac2:(simpl_ineq_chains ()) : wp_core.
  #[export] Hint Extern 1 ( _ = _ ) => progress ltac2:(simpl_ineq_chains ()); congruence 20 : wp_core.

Definitions

Create HintDb wp_definitions.

Classical logic

Create HintDb wp_classical_logic.

Logical negation

Create HintDb wp_negation_logic.

#[export] Hint Extern 1 => ltac2:(solve_by_manipulating_negation (fun () => ())) : wp_negation_logic.

Constructive logic

Create HintDb wp_constructive_logic.

  #[export] Hint Resolve not_ex_all_not : wp_constructive_logic.
  #[export] Hint Resolve ex_not_not_all : wp_constructive_logic.
  #[export] Hint Resolve all_not_not_ex : wp_constructive_logic.

Decidability based on classical epsilon

Create HintDb wp_decidability_epsilon.

#[export] Hint Resolve excluded_middle_informative : wp_decidability_epsilon.
#[export] Hint Resolve informative_or_lift : wp_decidability_epsilon.

Classical logic decidability

Create HintDb wp_decidability_classical.

#[export] Hint Resolve classic : wp_decidability_classical.

Constructive decidability

Create HintDb wp_decidability_constructive.

  #[export] Hint Resolve make_sumbool_uninformative_1 : wp_decidability_constructive.
  #[export] Hint Resolve make_sumbool_uninformative_2 : wp_decidability_constructive.
  #[export] Hint Resolve make_sumtriad_uninformative_1 : wp_decidability_constructive.
  #[export] Hint Resolve make_sumtriad_uninformative_2 : wp_decidability_constructive.
  #[export] Hint Resolve make_sumtriad_uninformative_3 : wp_decidability_constructive.
  #[export] Hint Resolve make_sumtriad_uninformative_4 : wp_decidability_constructive.
  #[export] Hint Resolve make_sumtriad_uninformative_5 : wp_decidability_constructive.
  #[export] Hint Resolve make_sumtriad_uninformative_6 : wp_decidability_constructive.

Natural numbers decidability

Create HintDb wp_decidability_nat.

#[export] Hint Resolve Nat.eq_dec : wp_decidability_nat.
#[export] Hint Extern 1 => lia : wp_decidability_nat.

Real numbers decidability

Create HintDb wp_decidability_reals.

Automatically unfold > to <so (_ > _) no longer has to occur in the options below. We cannot do the same for >= as it is not defined as <=.

  #[export] Hint Extern 1 => unfold Rgt : wp_decidability_reals.
  #[export] Hint Extern 1 => lra : wp_decidability_reals.

  #[export] Hint Resolve Req_EM_T : wp_decidability_reals.
  #[export] Hint Resolve Rlt_le_dec : wp_decidability_reals.
  #[export] Hint Resolve Rgt_ge_dec : wp_decidability_reals.

Lemmas to write e.g. {r1 ≤ r2} + {~r2 ≥ r1}

  #[export] Hint Resolve Rlt_dec Rle_dec Rge_dec : wp_decidability_reals.
  #[export] Hint Resolve Rle_lt_dec Rge_gt_dec : wp_decidability_reals.
  #[export] Hint Resolve Rle_lt_or_eq_dec : wp_decidability_reals.
  #[export] Hint Resolve Rge_lt_or_eq_dec : wp_decidability_reals.

x < y, x = y or y < x

#[export] Hint Resolve total_order_T : wp_decidability_reals.

lemmas to relate <= with >= and < with >

  #[export] Hint Resolve Rge_le : wp_decidability_reals.
  #[export] Hint Resolve Rle_ge : wp_decidability_reals.
  #[export] Hint Resolve Rgt_lt : wp_decidability_reals.
  #[export] Hint Resolve Rlt_gt : wp_decidability_reals.

Real numbers' addition and multiplication

Create HintDb wp_eq_plus.
Create HintDb wp_eq_mult.

x * y = y * x

#[export] Hint Extern 1 => (rewrite Rmult_comm) : wp_eq_mult.

Associativity We have the following associative properties

x * y * z = x * (y * z)

#[export] Hint Extern 1 => (rewrite Rmult_assoc) : wp_eq_mult.

x * (y+z) = x * y + x * z

#[export] Hint Extern 1 => (rewrite Rmult_plus_distr_l) : wp_eq_mult wp_eq_plus.

(x+y) * z = x * z + y * z

#[export] Hint Extern 1 => (rewrite Rmult_plus_distr_r) : wp_eq_mult wp_eq_plus.

x + y = y + x

#[export] Hint Extern 1 => (rewrite Rplus_comm) : wp_eq_plus.

x + y + z = x + (y + z)

  #[export] Hint Extern 1 => (rewrite Rplus_assoc) : wp_eq_plus.

  #[export] Hint Extern 1 => (rewrite Rdiv_plus_distr) : wp_eq_plus.

  #[export] Hint Extern 1 => (rewrite Rmult_plus_distr_l) : wp_eq_plus.
  #[export] Hint Extern 1 => (rewrite Rmult_plus_distr_r) : wp_eq_plus.

Opposite number

Create HintDb wp_eq_opp.

- (x - y) = y - x

#[export] Hint Extern 1 => (rewrite Ropp_minus_distr) : wp_eq_opp.

- (y - x) = x - y

#[export] Hint Extern 1 => (rewrite Ropp_minus_distr') : wp_eq_opp.

- (x * y) = - x * y

#[export] Hint Extern 1 => (rewrite Ropp_mult_distr_l) : wp_eq_opp.

- (x * y) = x * - y

#[export] Hint Extern 1 => (rewrite Ropp_mult_distr_r) : wp_eq_opp.

- x * y = - (x * y)

#[export] Hint Extern 1 => (rewrite Ropp_mult_distr_l_reverse) : wp_eq_opp.

x * - y = - (x * y)

#[export] Hint Extern 1 => (rewrite Ropp_mult_distr_r_reverse) : wp_eq_opp.

- (x + y) = - x + - y

#[export] Hint Extern 1 => (rewrite Ropp_plus_distr) : wp_eq_opp.

--a = a

#[export] Hint Extern 1 => (rewrite Ropp_involutive) : wp_eq_opp.

-a * -b = a * b

#[export] Hint Extern 1 => (rewrite Rmult_opp_opp) : wp_eq_opp.

- a / b = - (a / b)

#[export] Hint Extern 1 => (rewrite Ropp_div) : wp_eq_opp.

-a + a = 0

#[export] Hint Extern 1 => (rewrite Rplus_opp_l) : wp_eq_opp.

a + -a = 0

#[export] Hint Extern 1 => (rewrite Rplus_opp_r) : wp_eq_opp.

Real numbers' minus

Create HintDb wp_eq_minus.

(x - y) / z = x / z - y / z

#[export] Hint Extern 1 => (rewrite Rdiv_minus_distr) : wp_eq_minus.

#[export] Hint Extern 1 => (unfold Rminus) : wp_eq_minus.

Simplification with 0

Create HintDb wp_eq_zero.

0 + x = x

#[export] Hint Extern 1 => (rewrite Rplus_0_l) : wp_eq_zero.

x + 0 = x

#[export] Hint Extern 1 => (rewrite Rplus_0_r) : wp_eq_zero.

0 - x = - x

#[export] Hint Extern 1 => (rewrite Rminus_0_l) : wp_eq_zero.

x - 0 = x

#[export] Hint Extern 1 => (rewrite Rminus_0_r) : wp_eq_zero.

0 * x = 0

#[export] Hint Extern 1 => (rewrite Rmult_0_l) : wp_eq_zero.

x * 0 = 0

#[export] Hint Extern 1 => (rewrite Rmult_0_r) : wp_eq_zero.

x ^ 0 = 1

#[export] Hint Extern 1 => (rewrite pow_O) : wp_eq_zero.

Simplification with 1

Create HintDb wp_eq_one.

1 * x = x

#[export] Hint Extern 1 => (rewrite Rmult_1_l) : wp_eq_one.

x * 1 = x

#[export] Hint Extern 1 => (rewrite Rmult_1_r) : wp_eq_one.

x / 1 = x

#[export] Hint Extern 1 => (rewrite Rinv_1) : wp_eq_one.

x ^ 1 = x

#[export] Hint Extern 1 => (rewrite pow_1) : wp_eq_one.

/ / x = x

#[export] Hint Extern 1 => (rewrite Rinv_inv) : wp_eq_one.

Absolute value

Create HintDb wp_eq_abs.

||a - a|| = 0

#[export] Hint Extern 1 => (rewrite R_dist_eq) : wp_eq_abs.

||a * b - a * c|| = ||a|| * ||b - c||

#[export] Hint Extern 1 => (rewrite R_dist_mult_l) : wp_eq_abs.

||a - b|| = ||b - a||

#[export] Hint Extern 1 => (rewrite R_dist_sym) : wp_eq_abs.

|a - b| = |b - a|, using Rabs

#[export] Hint Extern 1 => (rewrite Rabs_minus_sym) : wp_eq_abs.

| |a| | = |a|

#[export] Hint Extern 1 => (rewrite Rabs_Rabsolu) : wp_eq_abs.

|-a| = |a|

#[export] Hint Extern 1 => (rewrite Rabs_Ropp) : wp_eq_abs.

|a * b| = |a| * |b|

#[export] Hint Extern 1 => (rewrite Rabs_mult) : wp_eq_abs.

a^2 = |a|^2

#[export] Hint Extern 1 => (rewrite Rsqr_abs) : wp_eq_abs.

sqrt(a^2) = |a|

#[export] Hint Extern 1 => (rewrite sqrt_Rsqr_abs) : wp_eq_abs.

| a |^2 = a^2

#[export] Hint Extern 1 => (rewrite pow2_abs) : wp_eq_abs.

Square root

Create HintDb wp_eq_sqr.

a² = a ^ 2

#[export] Hint Extern 1 => (rewrite Rsqr_pow2) : wp_eq_sqr.

(a-b)² = a² + b² + 2*a*b

#[export] Hint Extern 1 => (rewrite Rsqr_plus) : wp_eq_sqr.

(a+b)*(a-b) = a² - b²

#[export] Hint Extern 1 => (rewrite Rsqr_plus_minus) : wp_eq_sqr.

(a-b)² = a² + b² - 2*a*b

#[export] Hint Extern 1 => (rewrite Rsqr_minus) : wp_eq_sqr.

(a-b)*(a+b) = a² - b²

#[export] Hint Extern 1 => (rewrite Rsqr_minus_plus) : wp_eq_sqr.

a² = (-a)²

#[export] Hint Extern 1 => (rewrite Rsqr_neg) : wp_eq_sqr.

(a-b)² = (b-a)²

#[export] Hint Extern 1 => (rewrite Rsqr_neg_minus) : wp_eq_sqr.

(a*b)² = a² * b²

#[export] Hint Extern 1 => (rewrite Rsqr_mult) : wp_eq_sqr.

Exponential and logarithm

Create HintDb wp_eq_exp.

ln (exp a)) = a

#[export] Hint Extern 1 => (rewrite ln_exp) : wp_eq_exp.

exp (-a) = / exp a

#[export] Hint Extern 1 => (rewrite exp_Ropp) : wp_eq_exp.

exp(a+b) = exp(a) * exp(b)

#[export] Hint Extern 1 => (rewrite exp_plus) : wp_eq_exp.

ln (exp a)) = a

#[export] Hint Extern 1 => (rewrite ln_exp) : wp_eq_exp.

Integers

Create HintDb wp_integers.

  #[export] Hint Extern 3 ( _ = _ ) => ring : wp_integers.
  #[export] Hint Extern 1 ( @eq nat _ _) => cbn; ltac2:(simpl_ineq_chains ()); lia : wp_integers.
  #[export] Hint Extern 1 ( le _ _ ) => cbn; ltac2:(simpl_ineq_chains ()); lia : wp_integers.
  #[export] Hint Extern 1 ( ge _ _ ) => cbn; ltac2:(simpl_ineq_chains ()); lia : wp_integers.
  #[export] Hint Extern 1 ( lt _ _ ) => cbn; ltac2:(simpl_ineq_chains ()); lia : wp_integers.
  #[export] Hint Extern 1 ( gt _ _ ) => cbn; ltac2:(simpl_ineq_chains ()); lia : wp_integers.

Integer negation

Create HintDb wp_negation_int.

#[export] Hint Extern 1 => ltac2:(solve_by_manipulating_negation (fun () => ltac1:(lia))) : wp_negation_int.

Natural number negation

Create HintDb wp_negation_nat.

#[export] Hint Extern 1 => ltac2:(solve_by_manipulating_negation (fun () => ltac1:(lia))) : wp_negation_nat.

Real numbers

Create HintDb wp_reals.

  #[export] Hint Extern 2 => ltac2:(simpl_member_subset ()); lra : wp_reals.

  #[export] Hint Extern 1 (pred R _ _) => simpl; lra : wp_reals.

  #[export] Hint Extern 3 ( @eq R _ _ ) => field : wp_reals.

  #[export] Hint Extern 1 ( Rle _ _ ) => lra : wp_reals.
  #[export] Hint Extern 1 ( Rge _ _ ) => lra : wp_reals.
  #[export] Hint Extern 1 ( Rlt _ _ ) => lra : wp_reals.
  #[export] Hint Extern 1 ( Rgt _ _ ) => lra : wp_reals.

  #[export] Hint Extern 1 (~ (Rle _ _) ) => lra : wp_reals.
  #[export] Hint Extern 1 (~ (Rge _ _) ) => lra : wp_reals.
  #[export] Hint Extern 1 (~ (Rlt _ _) ) => lra : wp_reals.
  #[export] Hint Extern 1 (~ (Rgt _ _) ) => lra : wp_reals.
  #[export] Hint Extern 1 (~ (@eq R _ _ ) ) => lra : wp_reals.

  #[export] Hint Extern 2 ( @eq R _ _ ) => ltac2:(crush_R_abs_min_max ()): wp_reals.

  #[export] Hint Extern 2 ( Rle _ _ ) => ltac2:(crush_R_abs_min_max ()) : wp_reals.
  #[export] Hint Extern 2 ( Rge _ _ ) => ltac2:(crush_R_abs_min_max ()) : wp_reals.
  #[export] Hint Extern 2 ( Rlt _ _ ) => ltac2:(crush_R_abs_min_max ()) : wp_reals.
  #[export] Hint Extern 2 ( Rgt _ _ ) => ltac2:(crush_R_abs_min_max ()) : wp_reals.

  #[export] Hint Extern 3 (~ (Rle _ _) ) => cbn; ltac2:(crush_R_abs_min_max ()) : wp_reals.
  #[export] Hint Extern 3 (~ (Rge _ _) ) => cbn; ltac2:(crush_R_abs_min_max ()); lra : wp_reals.
  #[export] Hint Extern 3 (~ (Rlt _ _) ) => cbn; ltac2:(crush_R_abs_min_max ()); lra : wp_reals.
  #[export] Hint Extern 3 (~ (Rgt _ _) ) => cbn; ltac2:(crush_R_abs_min_max ()); lra : wp_reals.
  #[export] Hint Extern 3 (~ (@eq R _ _ ) ) => cbn; ltac2:(crush_R_abs_min_max ()); lra : wp_reals.

  #[export] Hint Extern 3 ( Rle _ _ ) => nra : wp_reals.
  #[export] Hint Extern 3 ( Rge _ _ ) => nra : wp_reals.
  #[export] Hint Extern 3 ( Rlt _ _ ) => nra : wp_reals.
  #[export] Hint Extern 3 ( Rgt _ _ ) => nra : wp_reals.

  #[export] Hint Resolve eq_sym : wp_reals.
  #[export] Hint Resolve false_Req : wp_reals.
  #[export] Hint Resolve true_Req : wp_reals.

  #[export] Hint Resolve Rmin_l : wp_reals.
  #[export] Hint Resolve Rmin_r : wp_reals.
  #[export] Hint Resolve Rmax_l : wp_reals.
  #[export] Hint Resolve Rmax_r : wp_reals.
  #[export] Hint Resolve Rle_max_compat_l : wp_reals.
  #[export] Hint Resolve Rle_max_compat_r : wp_reals.
  #[export] Hint Resolve Rmax_lub : wp_reals.
  #[export] Hint Resolve Rmax_lub_lt : wp_reals.
  #[export] Hint Resolve Rmax_left : wp_reals.
  #[export] Hint Resolve Rmax_right : wp_reals.
  #[export] Hint Resolve Rmin_left : wp_reals.
  #[export] Hint Resolve Rmin_right : wp_reals.
  #[export] Hint Resolve Rmin_glb : wp_reals.
  #[export] Hint Resolve Rmin_glb_lt : wp_reals.

lemmas to relate <= with >= and < with >

  #[export] Hint Resolve Rge_le : wp_reals.
  #[export] Hint Resolve Rle_ge : wp_reals.
  #[export] Hint Resolve Rgt_lt : wp_reals.
  #[export] Hint Resolve Rlt_gt : wp_reals.

  #[export] Hint Resolve div_sign_flip : wp_reals.
  #[export] Hint Resolve div_pos : wp_reals.
  #[export] Hint Resolve inv_remove : wp_reals.
  #[export] Hint Resolve Rinv_inv : wp_reals.
  #[export] Hint Resolve Rabs_def1 : wp_reals.
  #[export] Hint Resolve Rabs_le : wp_reals.
  #[export] Hint Resolve Rabs_left : wp_reals.
  #[export] Hint Resolve Rabs_minus_sym : wp_reals.
  #[export] Hint Resolve Rabs_right : wp_reals.
  #[export] Hint Resolve Rabs_left1 : wp_reals.
  #[export] Hint Resolve Rabs_left1_with_minus : wp_reals.
  #[export] Hint Resolve Rabs_pos_lt : wp_reals.
  #[export] Hint Resolve Rabs_Rabsolu : wp_reals.
  #[export] Hint Resolve Rabs_zero : wp_reals.
  #[export] Hint Resolve Rle_abs : wp_reals.
  #[export] Hint Resolve Rabs_pos : wp_reals.
  #[export] Hint Resolve Rle_abs_min : wp_reals.
  #[export] Hint Resolve Rge_min_abs : wp_reals.
  #[export] Hint Resolve Rmax_abs : wp_reals.
  #[export] Hint Resolve Rinv_0_lt_compat : wp_reals.
  #[export] Hint Resolve Rplus_lt_compat : wp_reals.
  #[export] Hint Resolve Rplus_lt_le_compat : wp_reals.

  #[export] Hint Extern 1 => rewrite Rabs_zero : wp_reals.

Real number negation

Create HintDb wp_negation_reals.

#[export] Hint Extern 1 => ltac2:(solve_by_manipulating_negation (fun () => ltac1:(lra))) : wp_negation_reals.

Sets

Create HintDb wp_sets.

#[export] Hint Resolve left_in_closed_open : wp_sets.
#[export] Hint Constructors Union Intersection Disjoint Full_set : wp_sets.

Intuition

Create HintDb wp_intuition.

#[export] Hint Extern 8 => intuition (auto 2 with core): wp_intuition.