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examples/interval/interval_goto.c

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+/*
+ * Cours "Sémantique et Application à la Vérification de programmes"
+ *
+ * Josselin Giet 2021
+ * Ecole normale supérieure, Paris, France / CNRS / INRIA
+ */
+
+void main(){
+  int i = 0;
+  if(brand){ goto L1; }
+  L0: // performing a widening here loose all information
+    goto LF;
+  L1:
+    if(brand) { i += 1; } else { i -= 1; } // i in [-1; 1]
+    goto L0;
+
+  LF:
+    assert(i <= 1);
+    assert(i >= -1);
+}