Datasets:
File size: 842 Bytes
c62beea | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | use vstd::prelude::*;
fn main() {}
verus!{
fn f1_has_common_element(list1: &Vec<i32>, list2: &Vec<i32>) -> (result: bool)
{
let mut i = 0;
while i < list1.len()
{
let mut j = 0;
while j < list2.len()
{
if list1[i] == list2[j] {
return true;
}
j += 1;
}
i += 1;
}
false
}
spec fn step1(__hp0: Seq<i32>, __hp1: Seq<i32>, outp: bool) -> bool {
(outp == (exists|i: int, j: int|
0 <= i < __hp0.len() && 0 <= j < __hp1.len() && (__hp0[i] == __hp1[j])))
}
fn chain_driver(list1: &Vec<i32>, list2: &Vec<i32>) -> (r_final: bool)
ensures
step1(list1@, list2@, r_final),
{
let x1 = f1_has_common_element(list1, list2);
proof {
assert(step1(list1@, list2@, x1));
}
x1
}
} // verus!
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