Update test-substitution

Author: geo2a

booster/test/rpc-integration/test-substitutions/README.md

@@ -39,6 +39,7 @@ NB: Booster applies the given substitution before performing any action.
   - starts from `concrete-subst`
   - with two equations that have circular dependencies: `Y = 1 +Int X`, `X = Y -Int 1`
   - leading to end state with `X == 42` from the `ensures`-clause
+  - `booster-dev` return a trivial circular constraint `X ==Int X`
 * `state-symbolic-bottom-predicate.execute`
   - starts from `symbolic-subst`
   - with an equation that is instantly false: `X = 1 +Int X`

booster/test/rpc-integration/test-substitutions/response-circular-equations.booster-dev

@@ -175,34 +175,69 @@
                                 }
                             },
                             "second": {
-                                "tag": "App",
-                                "name": "Lbl'UndsPlus'Int'Unds'",
-                                "sorts": [],
-                                "args": [
-                                    {
-                                        "tag": "DV",
-                                        "sort": {
-                                            "tag": "SortApp",
-                                            "name": "SortInt",
-                                            "args": []
-                                        },
-                                        "value": "1"
-                                    },
-                                    {
-                                        "tag": "EVar",
-                                        "name": "X",
-                                        "sort": {
-                                            "tag": "SortApp",
-                                            "name": "SortInt",
-                                            "args": []
-                                        }
-                                    }
-                                ]
+                                "tag": "DV",
+                                "sort": {
+                                    "tag": "SortApp",
+                                    "name": "SortInt",
+                                    "args": []
+                                },
+                                "value": "43"
                             }
                         }
                     ]
                 }
+            },
+            "predicate": {
+                "format": "KORE",
+                "version": 1,
+                "term": {
+                    "tag": "Equals",
+                    "argSort": {
+                        "tag": "SortApp",
+                        "name": "SortBool",
+                        "args": []
+                    },
+                    "sort": {
+                        "tag": "SortApp",
+                        "name": "SortGeneratedTopCell",
+                        "args": []
+                    },
+                    "first": {
+                        "tag": "DV",
+                        "sort": {
+                            "tag": "SortApp",
+                            "name": "SortBool",
+                            "args": []
+                        },
+                        "value": "true"
+                    },
+                    "second": {
+                        "tag": "App",
+                        "name": "Lbl'UndsEqlsEqls'Int'Unds'",
+                        "sorts": [],
+                        "args": [
+                            {
+                                "tag": "EVar",
+                                "name": "X",
+                                "sort": {
+                                    "tag": "SortApp",
+                                    "name": "SortInt",
+                                    "args": []
+                                }
+                            },
+                            {
+                                "tag": "EVar",
+                                "name": "X",
+                                "sort": {
+                                    "tag": "SortApp",
+                                    "name": "SortInt",
+                                    "args": []
+                                }
+                            }
+                        ]
+                    }
+                }
             }
         }
     }
-}
+}