Backend (catala.Verification.Io.Backend)

val init_backend : unit -> unit

type backend_context

val make_context : Shared_ast.decl_ctx -> backend_context

type vc_encoding

val print_encoding : vc_encoding -> string

type model

type solver_result =

| ProvenTrue

| ProvenFalse of model option

| Unknown

val solve_vc_encoding : backend_context -> vc_encoding -> solver_result

val print_model : backend_context -> model -> string

val is_model_empty : model -> bool

val translate_expr : 
  backend_context ->
  Shared_ast.typed Dcalc.Ast.expr ->
  backend_context * vc_encoding

val encode_asserts : 
  backend_context ->
  Shared_ast.typed Dcalc.Ast.expr ->
  backend_context