IDEA-74518: Associations for variable negation haven't been cleared on flush.

java/java-tests/testData/inspection/dataFlow/IDEADEV74518_2/expected.xml

@@ -0,0 +1,3 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<problems/>
+

java/java-tests/testData/inspection/dataFlow/IDEADEV74518_2/src/Sample.java

@@ -0,0 +1,17 @@
+public abstract class NoWarnings {
+    public void f() {
+      boolean A = false;
+      boolean B = false;
+
+      while (true) {
+          boolean f = g();
+          A = A || f;
+          B = B || !f;
+          if (A && B) {
+              return;
+          }
+      }
+    }
+  
+    public abstract boolean g();
+}