adding acc, host memory grows

Accelerated Computing HPC Compilers Legacy PGI Compilers
1

I am using Community Edition 18.4 and GTX1080 Ti.
The code is working in serial but adding acc, the host memory is growing constantly till computer is blocking.

UPDATE
I rewrite the question with a simpler example (memory grows because of accessing parallel region many-many times)

question
how I can avoid the memory to grow so much that is blocking the computer?

#include <stdio.h>
#include <openacc.h>

int main(void) {
	
	for (int k = 0; k < 32000; k++)
		for (int m = 0; m < 32000; m++)
			for (int p = 0; p < 32000; p++)
				for (int q = 0; q < 32000; q++)
				{
					#pragma acc parallel loop gang
					for (int j = 0; j < 10; j++)
						#pragma acc loop vector
						for (int i = 0; i < 10; i++)
							int a = 0;
				} 

	return 0;
}