ghost seq not implemented

[nishanthkarthik]

I am using Prusti version: 0.2.2, commit 528f4c2 2024-03-06 10:13:12 UTC, built on 2024-03-06 10:25:48 UTC

use prusti_contracts::*;

struct Token<T> {
    _p: std::marker::PhantomData<T>
}

#[model]
struct Token<#[generic] T: Copy> {
    ptrs: Seq<*mut T>,
}

This panics with a not-implemented. I followed the example from the examples in prusti-tests using a model with a built-in seq.

backtrace

thread 'rustc' panicked at prusti-viper/src/encoder/high/lower/predicates.rs:36:55:
not implemented
stack backtrace:
   0:     0x717ce1562efc - std::backtrace_rs::backtrace::libunwind::trace::h652247f520429b18
                               at /rustc/ca2b74f1ae5075d62e223c0a91574a1fc3f51c7c/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:     0x717ce1562efc - std::backtrace_rs::backtrace::trace_unsynchronized::h20ba733a518048ae
                               at /rustc/ca2b74f1ae5075d62e223c0a91574a1fc3f51c7c/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x717ce1562efc - std::sys_common::backtrace::_print_fmt::ha9cb2d71bba5eb16
                               at /rustc/ca2b74f1ae5075d62e223c0a91574a1fc3f51c7c/library/std/src/sys_common/backtrace.rs:67:5
   3:     0x717ce1562efc - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h527f3c0db321cf86
                               at /rustc/ca2b74f1ae5075d62e223c0a91574a1fc3f51c7c/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x717ce15c915c - core::fmt::rt::Argument::fmt::hc5a8cd063e05c609
                               at /rustc/ca2b74f1ae5075d62e223c0a91574a1fc3f51c7c/library/core/src/fmt/rt.rs:138:9
   5:     0x717ce15c915c - core::fmt::write::h818c732e4e373aa5
                               at /rustc/ca2b74f1ae5075d62e223c0a91574a1fc3f51c7c/library/core/src/fmt/mod.rs:1094:21
   6:     0x717ce1555b1e - std::io::Write::write_fmt::h9fe6c7e095e96a32
                               at /rustc/ca2b74f1ae5075d62e223c0a91574a1fc3f51c7c/library/std/src/io/mod.rs:1714:15
   7:     0x717ce1562ce4 - std::sys_common::backtrace::_print::h4b50c3b478ae2a37
                               at /rustc/ca2b74f1ae5075d62e223c0a91574a1fc3f51c7c/library/std/src/sys_common/backtrace.rs:47:5
   8:     0x717ce1562ce4 - std::sys_common::backtrace::print::hf2c7643f5414af94
                               at /rustc/ca2b74f1ae5075d62e223c0a91574a1fc3f51c7c/library/std/src/sys_common/backtrace.rs:34:9
   9:     0x717ce1565dda - std::panicking::panic_hook_with_disk_dump::{{closure}}::h62ff4ef3ec32306d
                               at /rustc/ca2b74f1ae5075d62e223c0a91574a1fc3f51c7c/library/std/src/panicking.rs:280:22
  10:     0x717ce1565a98 - std::panicking::panic_hook_with_disk_dump::hcd58ca7cb67f8702
                               at /rustc/ca2b74f1ae5075d62e223c0a91574a1fc3f51c7c/library/std/src/panicking.rs:307:9
  11:     0x717ce47690b9 - <rustc_driver_impl[8b2874cda94e7cd4]::install_ice_hook::{closure#0} as core[b0493a3e457862f3]::ops::function::FnOnce<(&core[b0493a3e457862f3]::panic::panic_info::PanicInfo,)>>::call_once::{shim:vtable#0}
  12:     0x717ce1566693 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h2b79b1e8b8bd4402
                               at /rustc/ca2b74f1ae5075d62e223c0a91574a1fc3f51c7c/library/alloc/src/boxed.rs:2021:9
  13:     0x717ce1566693 - std::panicking::rust_panic_with_hook::ha2c93276d1208654
                               at /rustc/ca2b74f1ae5075d62e223c0a91574a1fc3f51c7c/library/std/src/panicking.rs:757:13
  14:     0x717ce15663c6 - std::panicking::begin_panic_handler::{{closure}}::hb78d7a76234f0397
                               at /rustc/ca2b74f1ae5075d62e223c0a91574a1fc3f51c7c/library/std/src/panicking.rs:623:13
  15:     0x717ce1563426 - std::sys_common::backtrace::__rust_end_short_backtrace::h96e02fd19b415b36
                               at /rustc/ca2b74f1ae5075d62e223c0a91574a1fc3f51c7c/library/std/src/sys_common/backtrace.rs:170:18
  16:     0x717ce1566152 - rust_begin_unwind
                               at /rustc/ca2b74f1ae5075d62e223c0a91574a1fc3f51c7c/library/std/src/panicking.rs:619:5
  17:     0x717ce15c5505 - core::panicking::panic_fmt::h62ee289ca1991433
                               at /rustc/ca2b74f1ae5075d62e223c0a91574a1fc3f51c7c/library/core/src/panicking.rs:72:14
  18:     0x717ce15c55a3 - core::panicking::panic::ha5a2b79f85789cae
                               at /rustc/ca2b74f1ae5075d62e223c0a91574a1fc3f51c7c/library/core/src/panicking.rs:127:5
  19:     0x5d4a801489da - <prusti_viper::encoder::encoder::Encoder as prusti_viper::encoder::high::types::interface::HighTypeEncoderInterfacePrivate>::ensure_viper_predicate_encoded::h343084aaefbc612d
  20:     0x5d4a8014bd34 - <prusti_viper::encoder::encoder::Encoder as prusti_viper::encoder::high::types::interface::HighTypeEncoderInterface>::ensure_type_predicate_encoded::h86f45db38461aab2
  21:     0x5d4a80387588 - <prusti_viper::encoder::encoder::Encoder as prusti_viper::encoder::high::types::interface::HighTypeEncoderInterface>::encode_type::h890d1564464375a8
  22:     0x5d4a80039b29 - prusti_viper::encoder::mir_encoder::PlaceEncoder::encode_local::h4bf8171dd1a28497
  23:     0x5d4a802d8938 - prusti_viper::encoder::mir_encoder::PlaceEncoder::encode_projection::h54ea4a6fe994673b
  24:     0x5d4a802d5db1 - prusti_viper::encoder::mir_encoder::PlaceEncoder::encode_place::h971861316b2a6161
  25:     0x5d4a80283cec - prusti_viper::encoder::encoder::Encoder::encode_procedure::hee51d6caed060b78
  26:     0x5d4a8028c8e4 - prusti_viper::encoder::encoder::Encoder::process_encoding_queue::h8ac45f31b189ebe9
  27:     0x5d4a8038c4c6 - prusti_viper::verifier::Verifier::verify::h1d62cd60f58c6fcc
  28:     0x5d4a7fde8b25 - <prusti_driver::callbacks::PrustiCompilerCalls as rustc_driver_impl::Callbacks>::after_analysis::h7d8f5df69404394f
  29:     0x717ce3c789d6 - <rustc_interface[1527d435bc9889c9]::interface::Compiler>::enter::<rustc_driver_impl[8b2874cda94e7cd4]::run_compiler::{closure#1}::{closure#2}, core[b0493a3e457862f3]::result::Result<core[b0493a3e457862f3]::option::Option<rustc_interface[1527d435bc9889c9]::queries::Linker>, rustc_span[82af0e0afe7e8690]::ErrorGuaranteed>>
  30:     0x717ce3c71c04 - std[843b1ee06368cddb]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[1527d435bc9889c9]::util::run_in_thread_with_globals<rustc_interface[1527d435bc9889c9]::interface::run_compiler<core[b0493a3e457862f3]::result::Result<(), rustc_span[82af0e0afe7e8690]::ErrorGuaranteed>, rustc_driver_impl[8b2874cda94e7cd4]::run_compiler::{closure#1}>::{closure#0}, core[b0493a3e457862f3]::result::Result<(), rustc_span[82af0e0afe7e8690]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[b0493a3e457862f3]::result::Result<(), rustc_span[82af0e0afe7e8690]::ErrorGuaranteed>>
  31:     0x717ce3c7135e - <<std[843b1ee06368cddb]::thread::Builder>::spawn_unchecked_<rustc_interface[1527d435bc9889c9]::util::run_in_thread_with_globals<rustc_interface[1527d435bc9889c9]::interface::run_compiler<core[b0493a3e457862f3]::result::Result<(), rustc_span[82af0e0afe7e8690]::ErrorGuaranteed>, rustc_driver_impl[8b2874cda94e7cd4]::run_compiler::{closure#1}>::{closure#0}, core[b0493a3e457862f3]::result::Result<(), rustc_span[82af0e0afe7e8690]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[b0493a3e457862f3]::result::Result<(), rustc_span[82af0e0afe7e8690]::ErrorGuaranteed>>::{closure#1} as core[b0493a3e457862f3]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  32:     0x717ce1571075 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h7bff668e3fcc7cec
                               at /rustc/ca2b74f1ae5075d62e223c0a91574a1fc3f51c7c/library/alloc/src/boxed.rs:2007:9
  33:     0x717ce1571075 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h6cf1c11e2e0c58d1
                               at /rustc/ca2b74f1ae5075d62e223c0a91574a1fc3f51c7c/library/alloc/src/boxed.rs:2007:9
  34:     0x717ce1571075 - std::sys::unix::thread::Thread::new::thread_start::hfa7d5fcc9039f5da
                               at /rustc/ca2b74f1ae5075d62e223c0a91574a1fc3f51c7c/library/std/src/sys/unix/thread.rs:108:17
  35:     0x717cdfca955a - <unknown>
  36:     0x717cdfd26a3c - <unknown>
  37:                0x0 - <unknown>


rustc version: 1.74.0-nightly (ca2b74f1a 2023-09-14)
platform: x86_64-unknown-linux-gnu

query stack during panic:
end of query stack

[fpoli]

@Aurel300