if (!disableCheck) {
		double t = omp_get_wtime();
		omp_set_schedule(omp_sched_dynamic, chunksize);
		#pragma omp parallel
		for(int iter=0; iter<iterMax; ++iter) {
			//#pragma omp for schedule(dynamic,32)
			#pragma omp for schedule(runtime)
			for(int i=1; i<2*N-2; ++i) {
				if(i<N) {
					for(int j=1; j<=i; ++j) {
						int x = i-j+1;
						double old = mat_b[Idx2D(x, j)];
						mat_b[Idx2D(x, j)] = 0.8*old + 0.2*0.25*mat_b[Idx2D(x-1, j)]*mat_b[Idx2D(x+1, j)]*mat_b[Idx2D(x, j-1)]*mat_b[Idx2D(x, j+1)];
					}
				} else {
					for(int j=i-N+2; j<N; ++j) {
						int x = i-j+1;
						double old = mat_b[Idx2D(x, j)];
						mat_b[Idx2D(x, j)] = 0.9*old + 0.1*0.25*mat_b[Idx2D(x-1, j)]*mat_b[Idx2D(x+1, j)]*mat_b[Idx2D(x, j-1)]*mat_b[Idx2D(x, j+1)];
					}
				}
			}
		}
		printf("OMP Complete: %8.4lf\n", omp_get_wtime()-t);
		int ok = 0;
		int nok = 0;
		int nan = 0;
		for (int i = 0; i < N; i++) {
			for (int j = 0; j < N; j++) {
				if (isnan(mat_a[Idx2D(i, j)]) || isinf(mat_a[Idx2D(i, j)]) || isnan(mat_b[Idx2D(i, j)]) || isinf(mat_b[Idx2D(i, j)])) {
					nan++;
				} else if (fabs(mat_a[Idx2D(i, j)] - mat_b[Idx2D(i, j)]) < (double)0.000001) {
					ok++;
				} else {
					//printf("diff[%d,%d]: %.40lf - %.40lf = %.40lf\n", i,j,mat_a[Idx2D(i, j)], mat_b[Idx2D(i, j)], mat_a[Idx2D(i, j)] - mat_b[Idx2D(i, j)]);
					nok++;
				}
			}
		}
		printf("nan: %d, ok: %d, nok: %d\n", nan, ok, nok);
		if (nok != 0) {
			#include <sstream>
			std::stringstream ss;
			ss << "Test Failure: nok [" << nok << "] is not zero.";
			throw wfr::exception::wfr_fatal_error(ss.str());
		}
	}