From 0e1947ca3a45c13c1656a3db0cd72833ffa2cead Mon Sep 17 00:00:00 2001
From: Jens True <jens.chr.true@gmail.com>
Date: Thu, 3 Aug 2023 14:26:00 +0000
Subject: [PATCH] Adding Psalm analysis

---
 composer.json                                 |   11 +-
 composer.lock                                 | 1946 ++++++++++++++++-
 psalm.xml                                     |   17 +
 src/FactorGraphs/ScheduleLoop.php             |    2 -
 src/Numerics/BasicMath.php                    |   10 +-
 .../Factors/GaussianGreaterThanFactor.php     |    7 +-
 6 files changed, 1975 insertions(+), 18 deletions(-)
 create mode 100644 psalm.xml

diff --git a/composer.json b/composer.json
index 7f832fc..0ef9f75 100644
--- a/composer.json
+++ b/composer.json
@@ -10,7 +10,8 @@
     "rector/rector": "^0.17",
     "phpstan/phpstan": "^1",
     "laravel/pint": "^1",
-    "squizlabs/php_codesniffer": "*"
+    "squizlabs/php_codesniffer": "*",
+    "vimeo/psalm": "^5.14"
   },
   "autoload": {
     "psr-4": {
@@ -27,9 +28,11 @@
     "test-coverage":  "vendor/bin/phpunit tests --testdox --coverage-filter src --coverage-html output/coverage --coverage-text --path-coverage --testdox-html output/test.html  --log-junit output/test.xml ", 
     "analyze": [
         "@analyze-phpstan",
-        "@analyze-phpcs"
+        "@analyze-phpcs",
+        "@analyze-psalm"
     ],
-    "analyze-phpstan":"vendor/bin/phpstan analyze --level=8  --error-format=raw src/",
-    "analyze-phpcs":  "vendor/bin/phpcs --report=emacs  --standard=PSR12 --exclude=Generic.Files.LineLength src"
+    "analyze-phpstan":"vendor/bin/phpstan analyze --error-format=raw src/",
+    "analyze-phpcs":  "vendor/bin/phpcs --report=emacs  --standard=PSR12 --exclude=Generic.Files.LineLength src",
+    "analyze-psalm":  "vendor/bin/psalm"
   }
 }
diff --git a/composer.lock b/composer.lock
index 3ef1a94..ca7ce03 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,9 +4,639 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "6092042789ea6465090b6dd55aa2d70b",
+    "content-hash": "534f3e4c1275ca74e9ebe6dfc010d00c",
     "packages": [],
     "packages-dev": [
+        {
+            "name": "amphp/amp",
+            "version": "v2.6.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/amphp/amp.git",
+                "reference": "9d5100cebffa729aaffecd3ad25dc5aeea4f13bb"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/amphp/amp/zipball/9d5100cebffa729aaffecd3ad25dc5aeea4f13bb",
+                "reference": "9d5100cebffa729aaffecd3ad25dc5aeea4f13bb",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=7.1"
+            },
+            "require-dev": {
+                "amphp/php-cs-fixer-config": "dev-master",
+                "amphp/phpunit-util": "^1",
+                "ext-json": "*",
+                "jetbrains/phpstorm-stubs": "^2019.3",
+                "phpunit/phpunit": "^7 | ^8 | ^9",
+                "psalm/phar": "^3.11@dev",
+                "react/promise": "^2"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.x-dev"
+                }
+            },
+            "autoload": {
+                "files": [
+                    "lib/functions.php",
+                    "lib/Internal/functions.php"
+                ],
+                "psr-4": {
+                    "Amp\\": "lib"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Daniel Lowrey",
+                    "email": "rdlowrey@php.net"
+                },
+                {
+                    "name": "Aaron Piotrowski",
+                    "email": "aaron@trowski.com"
+                },
+                {
+                    "name": "Bob Weinand",
+                    "email": "bobwei9@hotmail.com"
+                },
+                {
+                    "name": "Niklas Keller",
+                    "email": "me@kelunik.com"
+                }
+            ],
+            "description": "A non-blocking concurrency framework for PHP applications.",
+            "homepage": "https://amphp.org/amp",
+            "keywords": [
+                "async",
+                "asynchronous",
+                "awaitable",
+                "concurrency",
+                "event",
+                "event-loop",
+                "future",
+                "non-blocking",
+                "promise"
+            ],
+            "support": {
+                "irc": "irc://irc.freenode.org/amphp",
+                "issues": "https://github.com/amphp/amp/issues",
+                "source": "https://github.com/amphp/amp/tree/v2.6.2"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/amphp",
+                    "type": "github"
+                }
+            ],
+            "time": "2022-02-20T17:52:18+00:00"
+        },
+        {
+            "name": "amphp/byte-stream",
+            "version": "v1.8.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/amphp/byte-stream.git",
+                "reference": "acbd8002b3536485c997c4e019206b3f10ca15bd"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/amphp/byte-stream/zipball/acbd8002b3536485c997c4e019206b3f10ca15bd",
+                "reference": "acbd8002b3536485c997c4e019206b3f10ca15bd",
+                "shasum": ""
+            },
+            "require": {
+                "amphp/amp": "^2",
+                "php": ">=7.1"
+            },
+            "require-dev": {
+                "amphp/php-cs-fixer-config": "dev-master",
+                "amphp/phpunit-util": "^1.4",
+                "friendsofphp/php-cs-fixer": "^2.3",
+                "jetbrains/phpstorm-stubs": "^2019.3",
+                "phpunit/phpunit": "^6 || ^7 || ^8",
+                "psalm/phar": "^3.11.4"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.x-dev"
+                }
+            },
+            "autoload": {
+                "files": [
+                    "lib/functions.php"
+                ],
+                "psr-4": {
+                    "Amp\\ByteStream\\": "lib"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Aaron Piotrowski",
+                    "email": "aaron@trowski.com"
+                },
+                {
+                    "name": "Niklas Keller",
+                    "email": "me@kelunik.com"
+                }
+            ],
+            "description": "A stream abstraction to make working with non-blocking I/O simple.",
+            "homepage": "http://amphp.org/byte-stream",
+            "keywords": [
+                "amp",
+                "amphp",
+                "async",
+                "io",
+                "non-blocking",
+                "stream"
+            ],
+            "support": {
+                "irc": "irc://irc.freenode.org/amphp",
+                "issues": "https://github.com/amphp/byte-stream/issues",
+                "source": "https://github.com/amphp/byte-stream/tree/v1.8.1"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/amphp",
+                    "type": "github"
+                }
+            ],
+            "time": "2021-03-30T17:13:30+00:00"
+        },
+        {
+            "name": "composer/pcre",
+            "version": "3.1.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/composer/pcre.git",
+                "reference": "4bff79ddd77851fe3cdd11616ed3f92841ba5bd2"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/composer/pcre/zipball/4bff79ddd77851fe3cdd11616ed3f92841ba5bd2",
+                "reference": "4bff79ddd77851fe3cdd11616ed3f92841ba5bd2",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.4 || ^8.0"
+            },
+            "require-dev": {
+                "phpstan/phpstan": "^1.3",
+                "phpstan/phpstan-strict-rules": "^1.1",
+                "symfony/phpunit-bridge": "^5"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-main": "3.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Composer\\Pcre\\": "src"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
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+                    "name": "Jordi Boggiano",
+                    "email": "j.boggiano@seld.be",
+                    "homepage": "http://seld.be"
+                }
+            ],
+            "description": "PCRE wrapping library that offers type-safe preg_* replacements.",
+            "keywords": [
+                "PCRE",
+                "preg",
+                "regex",
+                "regular expression"
+            ],
+            "support": {
+                "issues": "https://github.com/composer/pcre/issues",
+                "source": "https://github.com/composer/pcre/tree/3.1.0"
+            },
+            "funding": [
+                {
+                    "url": "https://packagist.com",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/composer",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/composer/composer",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2022-11-17T09:50:14+00:00"
+        },
+        {
+            "name": "composer/semver",
+            "version": "3.3.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/composer/semver.git",
+                "reference": "3953f23262f2bff1919fc82183ad9acb13ff62c9"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/composer/semver/zipball/3953f23262f2bff1919fc82183ad9acb13ff62c9",
+                "reference": "3953f23262f2bff1919fc82183ad9acb13ff62c9",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^5.3.2 || ^7.0 || ^8.0"
+            },
+            "require-dev": {
+                "phpstan/phpstan": "^1.4",
+                "symfony/phpunit-bridge": "^4.2 || ^5"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-main": "3.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Composer\\Semver\\": "src"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Nils Adermann",
+                    "email": "naderman@naderman.de",
+                    "homepage": "http://www.naderman.de"
+                },
+                {
+                    "name": "Jordi Boggiano",
+                    "email": "j.boggiano@seld.be",
+                    "homepage": "http://seld.be"
+                },
+                {
+                    "name": "Rob Bast",
+                    "email": "rob.bast@gmail.com",
+                    "homepage": "http://robbast.nl"
+                }
+            ],
+            "description": "Semver library that offers utilities, version constraint parsing and validation.",
+            "keywords": [
+                "semantic",
+                "semver",
+                "validation",
+                "versioning"
+            ],
+            "support": {
+                "irc": "irc://irc.freenode.org/composer",
+                "issues": "https://github.com/composer/semver/issues",
+                "source": "https://github.com/composer/semver/tree/3.3.2"
+            },
+            "funding": [
+                {
+                    "url": "https://packagist.com",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/composer",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/composer/composer",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2022-04-01T19:23:25+00:00"
+        },
+        {
+            "name": "composer/xdebug-handler",
+            "version": "3.0.3",
+            "source": {
+                "type": "git",
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+                "reference": "ced299686f41dce890debac69273b47ffe98a40c"
+            },
+            "dist": {
+                "type": "zip",
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+                "reference": "ced299686f41dce890debac69273b47ffe98a40c",
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+            },
+            "require": {
+                "composer/pcre": "^1 || ^2 || ^3",
+                "php": "^7.2.5 || ^8.0",
+                "psr/log": "^1 || ^2 || ^3"
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+            "require-dev": {
+                "phpstan/phpstan": "^1.0",
+                "phpstan/phpstan-strict-rules": "^1.1",
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+            "autoload": {
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+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
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+            "authors": [
+                {
+                    "name": "John Stevenson",
+                    "email": "john-stevenson@blueyonder.co.uk"
+                }
+            ],
+            "description": "Restarts a process without Xdebug.",
+            "keywords": [
+                "Xdebug",
+                "performance"
+            ],
+            "support": {
+                "irc": "irc://irc.freenode.org/composer",
+                "issues": "https://github.com/composer/xdebug-handler/issues",
+                "source": "https://github.com/composer/xdebug-handler/tree/3.0.3"
+            },
+            "funding": [
+                {
+                    "url": "https://packagist.com",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/composer",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/composer/composer",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2022-02-25T21:32:43+00:00"
+        },
+        {
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+            "version": "v0.1.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/dnoegel/php-xdg-base-dir.git",
+                "reference": "8f8a6e48c5ecb0f991c2fdcf5f154a47d85f9ffd"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/dnoegel/php-xdg-base-dir/zipball/8f8a6e48c5ecb0f991c2fdcf5f154a47d85f9ffd",
+                "reference": "8f8a6e48c5ecb0f991c2fdcf5f154a47d85f9ffd",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.2"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "~7.0|~6.0|~5.0|~4.8.35"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "XdgBaseDir\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "description": "implementation of xdg base directory specification for php",
+            "support": {
+                "issues": "https://github.com/dnoegel/php-xdg-base-dir/issues",
+                "source": "https://github.com/dnoegel/php-xdg-base-dir/tree/v0.1.1"
+            },
+            "time": "2019-12-04T15:06:13+00:00"
+        },
+        {
+            "name": "doctrine/deprecations",
+            "version": "v1.1.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/doctrine/deprecations.git",
+                "reference": "612a3ee5ab0d5dd97b7cf3874a6efe24325efac3"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/doctrine/deprecations/zipball/612a3ee5ab0d5dd97b7cf3874a6efe24325efac3",
+                "reference": "612a3ee5ab0d5dd97b7cf3874a6efe24325efac3",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.1 || ^8.0"
+            },
+            "require-dev": {
+                "doctrine/coding-standard": "^9",
+                "phpstan/phpstan": "1.4.10 || 1.10.15",
+                "phpstan/phpstan-phpunit": "^1.0",
+                "phpunit/phpunit": "^7.5 || ^8.5 || ^9.5",
+                "psalm/plugin-phpunit": "0.18.4",
+                "psr/log": "^1 || ^2 || ^3",
+                "vimeo/psalm": "4.30.0 || 5.12.0"
+            },
+            "suggest": {
+                "psr/log": "Allows logging deprecations via PSR-3 logger implementation"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Doctrine\\Deprecations\\": "lib/Doctrine/Deprecations"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "description": "A small layer on top of trigger_error(E_USER_DEPRECATED) or PSR-3 logging with options to disable all deprecations or selectively for packages.",
+            "homepage": "https://www.doctrine-project.org/",
+            "support": {
+                "issues": "https://github.com/doctrine/deprecations/issues",
+                "source": "https://github.com/doctrine/deprecations/tree/v1.1.1"
+            },
+            "time": "2023-06-03T09:27:29+00:00"
+        },
+        {
+            "name": "felixfbecker/advanced-json-rpc",
+            "version": "v3.2.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/felixfbecker/php-advanced-json-rpc.git",
+                "reference": "b5f37dbff9a8ad360ca341f3240dc1c168b45447"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/felixfbecker/php-advanced-json-rpc/zipball/b5f37dbff9a8ad360ca341f3240dc1c168b45447",
+                "reference": "b5f37dbff9a8ad360ca341f3240dc1c168b45447",
+                "shasum": ""
+            },
+            "require": {
+                "netresearch/jsonmapper": "^1.0 || ^2.0 || ^3.0 || ^4.0",
+                "php": "^7.1 || ^8.0",
+                "phpdocumentor/reflection-docblock": "^4.3.4 || ^5.0.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^7.0 || ^8.0"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "AdvancedJsonRpc\\": "lib/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "ISC"
+            ],
+            "authors": [
+                {
+                    "name": "Felix Becker",
+                    "email": "felix.b@outlook.com"
+                }
+            ],
+            "description": "A more advanced JSONRPC implementation",
+            "support": {
+                "issues": "https://github.com/felixfbecker/php-advanced-json-rpc/issues",
+                "source": "https://github.com/felixfbecker/php-advanced-json-rpc/tree/v3.2.1"
+            },
+            "time": "2021-06-11T22:34:44+00:00"
+        },
+        {
+            "name": "felixfbecker/language-server-protocol",
+            "version": "v1.5.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/felixfbecker/php-language-server-protocol.git",
+                "reference": "6e82196ffd7c62f7794d778ca52b69feec9f2842"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/felixfbecker/php-language-server-protocol/zipball/6e82196ffd7c62f7794d778ca52b69feec9f2842",
+                "reference": "6e82196ffd7c62f7794d778ca52b69feec9f2842",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=7.1"
+            },
+            "require-dev": {
+                "phpstan/phpstan": "*",
+                "squizlabs/php_codesniffer": "^3.1",
+                "vimeo/psalm": "^4.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "LanguageServerProtocol\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "ISC"
+            ],
+            "authors": [
+                {
+                    "name": "Felix Becker",
+                    "email": "felix.b@outlook.com"
+                }
+            ],
+            "description": "PHP classes for the Language Server Protocol",
+            "keywords": [
+                "language",
+                "microsoft",
+                "php",
+                "server"
+            ],
+            "support": {
+                "issues": "https://github.com/felixfbecker/php-language-server-protocol/issues",
+                "source": "https://github.com/felixfbecker/php-language-server-protocol/tree/v1.5.2"
+            },
+            "time": "2022-03-02T22:36:06+00:00"
+        },
+        {
+            "name": "fidry/cpu-core-counter",
+            "version": "0.5.1",
+            "source": {
+                "type": "git",
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@@ -1860,6 +3640,170 @@
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+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "5.x-dev",
+                    "dev-4.x": "4.x-dev",
+                    "dev-3.x": "3.x-dev",
+                    "dev-2.x": "2.x-dev",
+                    "dev-1.x": "1.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Psalm\\": "src/Psalm/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Matthew Brown"
+                }
+            ],
+            "description": "A static analysis tool for finding errors in PHP applications",
+            "keywords": [
+                "code",
+                "inspection",
+                "php",
+                "static analysis"
+            ],
+            "support": {
+                "issues": "https://github.com/vimeo/psalm/issues",
+                "source": "https://github.com/vimeo/psalm/tree/5.14.1"
+            },
+            "time": "2023-08-01T05:16:55+00:00"
+        },
+        {
+            "name": "webmozart/assert",
+            "version": "1.11.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/webmozarts/assert.git",
+                "reference": "11cb2199493b2f8a3b53e7f19068fc6aac760991"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/webmozarts/assert/zipball/11cb2199493b2f8a3b53e7f19068fc6aac760991",
+                "reference": "11cb2199493b2f8a3b53e7f19068fc6aac760991",
+                "shasum": ""
+            },
+            "require": {
+                "ext-ctype": "*",
+                "php": "^7.2 || ^8.0"
+            },
+            "conflict": {
+                "phpstan/phpstan": "<0.12.20",
+                "vimeo/psalm": "<4.6.1 || 4.6.2"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^8.5.13"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.10-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Webmozart\\Assert\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Bernhard Schussek",
+                    "email": "bschussek@gmail.com"
+                }
+            ],
+            "description": "Assertions to validate method input/output with nice error messages.",
+            "keywords": [
+                "assert",
+                "check",
+                "validate"
+            ],
+            "support": {
+                "issues": "https://github.com/webmozarts/assert/issues",
+                "source": "https://github.com/webmozarts/assert/tree/1.11.0"
+            },
+            "time": "2022-06-03T18:03:27+00:00"
         }
     ],
     "aliases": [],
diff --git a/psalm.xml b/psalm.xml
new file mode 100644
index 0000000..75966d3
--- /dev/null
+++ b/psalm.xml
@@ -0,0 +1,17 @@
+<?xml version="1.0"?>
+<psalm
+    errorLevel="7"
+    resolveFromConfigFile="true"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xmlns="https://getpsalm.org/schema/config"
+    xsi:schemaLocation="https://getpsalm.org/schema/config vendor/vimeo/psalm/config.xsd"
+    findUnusedBaselineEntry="true"
+    findUnusedCode="true"
+>
+    <projectFiles>
+        <directory name="src" />
+        <ignoreFiles>
+            <directory name="vendor" />
+        </ignoreFiles>
+    </projectFiles>
+</psalm>
diff --git a/src/FactorGraphs/ScheduleLoop.php b/src/FactorGraphs/ScheduleLoop.php
index bf629d5..56d00ca 100644
--- a/src/FactorGraphs/ScheduleLoop.php
+++ b/src/FactorGraphs/ScheduleLoop.php
@@ -11,11 +11,9 @@ class ScheduleLoop extends Schedule
 
     public function visit(int $depth = -1, int $maxDepth = 0): float
     {
-        $totalIterations = 1;
         $delta = $this->scheduleToLoop->visit($depth + 1, $maxDepth);
         while ($delta > $this->maxDelta) {
             $delta = $this->scheduleToLoop->visit($depth + 1, $maxDepth);
-            $totalIterations++;
         }
 
         return $delta;
diff --git a/src/Numerics/BasicMath.php b/src/Numerics/BasicMath.php
index 9126f1b..2e3ff9b 100644
--- a/src/Numerics/BasicMath.php
+++ b/src/Numerics/BasicMath.php
@@ -13,10 +13,10 @@ class BasicMath
     /**
      * Squares the input (x^2 = x * x)
      *
-     * @param  number $x Value to square (x)
-     * @return number The squared value (x^2)
+     * @param  float $x Value to square (x)
+     * @return float The squared value (x^2)
      */
-    public static function square($x): float|int
+    public static function square($x): float
     {
         return $x * $x;
     }
@@ -26,9 +26,9 @@ class BasicMath
      *
      * @param  mixed[]    $itemsToSum The items to sum,
      * @param  \Closure $callback   The function to apply to each array element before summing.
-     * @return number The sum.
+     * @return float The sum.
      */
-    public static function sum(array $itemsToSum, \Closure $callback): float|int
+    public static function sum(array $itemsToSum, \Closure $callback): float
     {
         $mappedItems = array_map($callback, $itemsToSum);
 
diff --git a/src/TrueSkill/Factors/GaussianGreaterThanFactor.php b/src/TrueSkill/Factors/GaussianGreaterThanFactor.php
index 249152f..1b55fe1 100644
--- a/src/TrueSkill/Factors/GaussianGreaterThanFactor.php
+++ b/src/TrueSkill/Factors/GaussianGreaterThanFactor.php
@@ -25,15 +25,10 @@ class GaussianGreaterThanFactor extends GaussianFactor
 
     public function getLogNormalization(): float
     {
-        /**
- * @var Variable[] $vars
-*/
         $vars = $this->getVariables();
         $marginal = $vars[0]->getValue();
 
-        /**
- * @var Message[] $messages
-*/
+
         $messages = $this->getMessages();
         $message = $messages[0]->getValue();
         $messageFromVariable = GaussianDistribution::divide($marginal, $message);