[clang] [analyzer] Don't assume third iteration in loops (PR #119388)

[Balazs Benics via cfe-commits]

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@@ -2801,8 +2799,35 @@ void ExprEngine::processBranch(const Stmt *Condition,
     if (StTrue && StFalse)
       assert(!isa<ObjCForCollectionStmt>(Condition));
 
-    if (StTrue)
-      Builder.generateNode(StTrue, true, PredN);
+    if (StTrue) {
+      // If we are processing a loop condition where two iterations have
+      // already been completed and the the false branch is also feasible, then
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steakhal wrote:

```suggestion
      // already been completed and the false branch is also feasible, then
```

https://github.com/llvm/llvm-project/pull/119388