# Packages matching: installed
# Name # Installed # Synopsis
base-bigarray base
base-domains base
base-nnp base Naked pointers prohibited in the OCaml heap
base-threads base
base-unix base
conf-gmp 4 Virtual package relying on a GMP lib system installation
coq 8.17.1 The Coq Proof Assistant
coq-core 8.17.1 The Coq Proof Assistant -- Core Binaries and Tools
coq-stdlib 8.17.1 The Coq Proof Assistant -- Standard Library
coqide-server 8.17.1 The Coq Proof Assistant, XML protocol server
dune 3.12.2 Fast, portable, and opinionated build system
ocaml 5.0.0 The OCaml compiler (virtual package)
ocaml-base-compiler 5.0.0 Official release 5.0.0
ocaml-config 3 OCaml Switch Configuration
ocaml-options-vanilla 1 Ensure that OCaml is compiled with no special options enabled
ocamlfind 1.9.6 A library manager for OCaml
zarith 1.13 Implements arithmetic and logical operations over arbitrary-precision integers
# opam file:
opam-version: "2.0"
maintainer: "Minki Cho <minki.cho@sf.snu.ac.kr>, Youngju Song <youngju@mpi-sws.org>"
authors: "Minki Cho, Youngju Song, Dongjae Lee"
license: "BSD-3-Clause"
homepage: "https://github.com/CCR-project/FreeSim"
bug-reports: "https://github.com/CCR-project/FreeSim/issues"
dev-repo: "git+https://github.com/CCR-project/FreeSim"
synopsis: "Stuttering For Free"
description: """
One of the most common tools for proving behavioral refinements between transition systems is the method of simulation proofs, which has been explored extensively over the past several decades.
Stuttering simulations are an extension of traditional simulations---used, for example, in CompCert---in which either the source or target of the simulation is permitted to ``stutter'' (stay in place) while the other side steps forward.
In the interest of ensuring soundness, however, existing stuttering simulations restrict proofs to only perform a finite number of stuttering steps before making synchronous progress---a step of reasoning in which both sides of the simulation progress forward together.
This restriction guarantees that a terminating program cannot be proven to simulate a non-terminating one.
In this paper, we observe that the requirement to eventually achieve synchronous progress is burdensome and, what's more, unnecessary: it is possible to ensure soundness of stuttering simulations while only requiring asynchronous progress (progress on both sides of the simulation that may be achieved with only stuttering steps).
Building on this observation, we develop a new simulation technique we call FreeSim (short for ``freely-stuttering simulations''), mechanized in Coq, and we demonstrate its effectiveness on a range of interesting case studies.
These include a simplification of the meta-theory of CompCert, as well as the DTrees library, which enriches the ITrees (Interaction Trees) library with dual non-determinism.
"""
tags: [
"keyword:simulation"
"keyword:coinduction"
"keyword:dual non-determinism"
"keyword:up to techniques"
"keyword:companion"
"keyword:Interaction Trees"
"keyword:CompCert"
"logpath:FreeSim"
]
depends: [
"coq" { >= "8.15" & < "8.16" }
"coq-paco" { (= "4.1.2") }
"coq-itree" { (= "4.0.0") }
"coq-ordinal" { (= "0.5.2") }
"coq-compcert" { (= "3.11") }
]
build: [make "-j%{jobs}%"]
install: [make "-f" "Makefile.coq" "install"]
url {
src: "https://github.com/CCR-project/FreeSim/archive/refs/tags/AE.tar.gz"
checksum: "sha512=5c561c8f66a9733ff353292c6b7ac2ddb272eb1d71720597fd269a69aac2c7aa3474e19f36278e4e45e1ee0f52913b9de3aa554362be0c760f699359b996a55f"
}
trueDry install with the current Coq version:
opam install -y --show-action coq-freesim.1.0.0 coq.8.17.1[NOTE] Package coq is already installed (current version is 8.17.1).
[ERROR] Package conflict!
* No agreement on the version of ocaml:
- (invariant) -> ocaml-base-compiler = 5.0.0 -> ocaml = 5.0.0
- coq-freesim -> coq < 8.16 -> ocaml < 4.02.0
You can temporarily relax the switch invariant with `--update-invariant'
* No agreement on the version of ocaml-base-compiler:
- (invariant) -> ocaml-base-compiler = 5.0.0
- coq-freesim -> coq < 8.16 -> ocaml < 4.02.0 -> ocaml-base-compiler = 3.07+1
* Incompatible packages:
- (invariant) -> ocaml-base-compiler = 5.0.0 -> base-nnp
- coq-freesim -> coq < 8.16
* Missing dependency:
- coq-freesim -> coq < 8.16 -> ocaml < 4.02.0 -> ocaml-variants >= 3.09.2 -> ocaml-beta
unmet availability conditions: 'enable-ocaml-beta-repository'
No solution found, exiting
Dry install without Coq/switch base, to test if the problem was incompatibility with the current Coq/OCaml version:
opam remove -y coq; opam install -y --show-action --unlock-base coq-freesim.1.0.0truetrueNo files were installed.
true