Use-After-Query.ql does not work on this simple situation

I use Use-After-Query.ql to detec a simple c code which exists UAF bug , but it doesn't works
- Use-After-Query.ql

```
/**
* @name Potential use after free
* @description An allocated memory block is used after it has been freed. Behavior in such cases is undefined and can cause memory corruption.
* @kind path-problem
* @precision high
* @id cpp/use-after-free
* @problem.severity warning
* @security-severity 9.3
* @tags reliability
* security
* external/cwe/cwe-416
*/

import cpp
import semmle.code.cpp.dataflow.new.DataFlow
import semmle.code.cpp.ir.IR
import semmle.code.cpp.security.flowafterfree.FlowAfterFree
import semmle.code.cpp.security.flowafterfree.UseAfterFree
import UseAfterFreeTrace::PathGraph

module UseAfterFreeParam implements FlowFromFreeParamSig {
predicate isSink = isUse/2;

predicate isExcluded = isExcludedMmFreePageFromMdl/2;

predicate sourceSinkIsRelated = defaultSourceSinkIsRelated/2;
}

import UseAfterFreeParam

module UseAfterFreeTrace = FlowFromFree;

from UseAfterFreeTrace::PathNode source, UseAfterFreeTrace::PathNode sink, DeallocationExpr dealloc
where
UseAfterFreeTrace::flowPath(source, sink) and
isFree(source.getNode(), _, _, dealloc)
select sink.getNode(), source, sink, "Memory may have been previously freed by $@.", dealloc,
dealloc.toString()

```

- my code
```
#include
#include
#include

void process_buffer(char *buffer) {
if (buffer != NULL) {
printf("Processing buffer: %s\n", buffer);
}
}

void free_buffer(char *buffer) {
if (buffer != NULL) {
free(buffer); // 释放内存
printf("Buffer freed.\n");
}
}

void use_after_free(char *buffer) {
// 释放后再次使用内存，存在UAF漏洞
process_buffer(buffer);
}

int main() {
char *buffer = (char *)malloc(100); // 分配100字节的内存
if (buffer == NULL) {
perror("Failed to allocate memory");
exit(EXIT_FAILURE);
}

strcpy(buffer, "This is a test string."); // 使用分配的内存
printf("Buffer before free: %s\n", buffer);

free_buffer(buffer); // 调用函数释放内存

use_after_free(buffer); // 释放后再次使用

return 0;
}

```
its result shows there has no bugs, I don't know why