use crate::prelude::*;
use std::collections::HashMap;
use std::rc::Rc;
use std::result::Result;
impl Runtime {
pub fn verify_or_fact_with_known_forall(
&mut self,
or_fact: &OrFact,
verify_state: &VerifyState,
) -> Result<StmtResult, RuntimeError> {
if let Some(fact_verified) =
self.try_verify_or_fact_with_known_forall_facts_in_envs(or_fact, verify_state)?
{
return Ok((fact_verified).into());
}
Ok((StmtUnknown::new()).into())
}
fn get_matched_or_fact_in_known_forall_fact_in_envs(
&mut self,
iterate_from_env_index: usize,
iterate_from_known_forall_fact_index: usize,
given_or_fact: &OrFact,
) -> Result<
(
(usize, usize),
Option<HashMap<String, Obj>>,
Option<(OrFact, Rc<KnownForallFactParamsAndDom>)>,
),
RuntimeError,
> {
let lookup_key = given_or_fact.key();
let envs_count = self.environment_stack.len();
for i in iterate_from_env_index..envs_count {
let stack_idx = envs_count - 1 - i;
let known_forall_facts_count = {
let env = &self.environment_stack[stack_idx];
match env.known_or_facts_in_forall_facts.get(lookup_key.as_str()) {
Some(v) => v.len(),
None => continue,
}
};
let start_index = if i == iterate_from_env_index {
iterate_from_known_forall_fact_index
} else {
0
};
for j in start_index..known_forall_facts_count {
let entry_idx = known_forall_facts_count - 1 - j;
let (fact_args_in_known_forall, given_fact_args, current_known_forall) = {
let env = &self.environment_stack[stack_idx];
let Some(known_forall_facts_in_env) =
env.known_or_facts_in_forall_facts.get(lookup_key.as_str())
else {
continue;
};
let Some(current_known_forall) = known_forall_facts_in_env.get(entry_idx)
else {
continue;
};
(
current_known_forall.0.get_args_from_fact(),
given_or_fact.get_args_from_fact(),
current_known_forall.clone(),
)
};
let match_result = self.match_args_in_fact_in_known_forall_fact_with_given_args(
&fact_args_in_known_forall,
&given_fact_args,
)?;
if let Some(arg_map) = match_result {
return Ok(((i, j), Some(arg_map), Some(current_known_forall)));
}
}
}
Ok(((0, 0), None, None))
}
fn try_verify_or_fact_with_known_forall_facts_in_envs(
&mut self,
or_fact: &OrFact,
verify_state: &VerifyState,
) -> Result<Option<FactualStmtSuccess>, RuntimeError> {
let mut iterate_from_env_index = 0;
let mut iterate_from_known_forall_fact_index = 0;
loop {
let result = self.get_matched_or_fact_in_known_forall_fact_in_envs(
iterate_from_env_index,
iterate_from_known_forall_fact_index,
or_fact,
)?;
let ((i, j), arg_map_opt, known_forall_opt) = result;
match (arg_map_opt, known_forall_opt) {
(Some(arg_map), Some((or_fact_in_known_forall, forall_rc))) => {
if let Some(fact_verified) = self
.verify_or_fact_args_satisfy_forall_requirements(
&or_fact_in_known_forall,
&forall_rc,
arg_map,
or_fact,
verify_state,
)?
{
return Ok(Some(fact_verified));
}
iterate_from_env_index = i;
iterate_from_known_forall_fact_index = j + 1;
}
_ => return Ok(None),
}
}
}
fn verify_or_fact_args_satisfy_forall_requirements(
&mut self,
or_fact_in_known_forall: &OrFact,
known_forall: &Rc<KnownForallFactParamsAndDom>,
arg_map: HashMap<String, Obj>,
given_or_fact: &OrFact,
verify_state: &VerifyState,
) -> Result<Option<FactualStmtSuccess>, RuntimeError> {
let param_names = known_forall.params_def.collect_param_names();
if !param_names
.iter()
.all(|param_name| arg_map.contains_key(param_name))
{
return Ok(None);
}
let mut args_for_params: Vec<Obj> = Vec::new();
for param_name in param_names.iter() {
let obj = match arg_map.get(param_name) {
Some(v) => v,
None => return Ok(None),
};
args_for_params.push(obj.clone());
}
let args_param_types = self
.verify_args_satisfy_param_def_flat_types(
&known_forall.params_def,
&args_for_params,
verify_state,
ParamObjType::Forall,
)
.map_err(|e| {
{
RuntimeError::from(VerifyRuntimeError(RuntimeErrorStruct::new(
Some(Fact::from(given_or_fact.clone()).into_stmt()),
String::new(),
given_or_fact.line_file.clone(),
Some(e),
vec![],
)))
}
})?;
if args_param_types.is_unknown() {
return Ok(None);
}
let param_to_arg_map = match known_forall
.params_def
.param_def_params_to_arg_map(&arg_map)
{
Some(m) => m,
None => return Ok(None),
};
for dom_fact in known_forall.dom.iter() {
let instantiated_dom_fact = self
.inst_fact(dom_fact, ¶m_to_arg_map, ParamObjType::Forall, None)
.map_err(|e| {
{
RuntimeError::from(VerifyRuntimeError(RuntimeErrorStruct::new(
Some(Fact::from(given_or_fact.clone()).into_stmt()),
String::new(),
given_or_fact.line_file.clone(),
Some(e),
vec![],
)))
}
})?;
let result = self
.verify_fact(&instantiated_dom_fact, verify_state)
.map_err(|e| {
{
RuntimeError::from(VerifyRuntimeError(RuntimeErrorStruct::new(
Some(Fact::from(given_or_fact.clone()).into_stmt()),
String::new(),
given_or_fact.line_file.clone(),
Some(e),
vec![],
)))
}
})?;
if result.is_unknown() {
return Ok(None);
}
}
let verified_by_known_forall_fact = ForallFact::new(
known_forall.params_def.clone(),
known_forall.dom.clone(),
vec![or_fact_in_known_forall.clone().into()],
known_forall.line_file.clone(),
)?;
let fact_verified = FactualStmtSuccess::new_with_verified_by_known_fact(
given_or_fact.clone().into(),
VerifiedByResult::wrap_bys(vec![VerifiedBysEnum::cited_fact(
given_or_fact.clone().into(),
verified_by_known_forall_fact.clone().into(),
None,
)]),
Vec::new(),
);
Ok(Some(fact_verified))
}
}