Set Wave True causes algorithm always to fail.

[RonYanDaik]

I've tried to alternate a bit algorithm with my poor understanding of it by changing function Wave::set to accept true values:

bool Wave::set(unsigned index, unsigned pattern, bool value) noexcept
{
	bool old_value = data.get(index, pattern);
	// If the value isn't changed, nothing needs to be done.
	if (old_value == value)
	{
		return false;
	}
	// Otherwise, the memoisation should be updated.
	data.get(index, pattern) = value;
	if(!value){
		memoisation.plogp_sum[index] -=  plogp_patterns_frequencies[pattern];
		memoisation.sum[index] -= patterns_frequencies[pattern];
		memoisation.log_sum[index] = log(memoisation.sum[index]);
		memoisation.nb_patterns[index]--;
		memoisation.entropy[index] = memoisation.log_sum[index] - memoisation.plogp_sum[index] / memoisation.sum[index];
	}else{
		memoisation.plogp_sum[index] +=  plogp_patterns_frequencies[pattern];
		memoisation.sum[index] += patterns_frequencies[pattern];
		memoisation.log_sum[index] = log(memoisation.sum[index]);
		memoisation.nb_patterns[index]++;
		memoisation.entropy[index] = memoisation.log_sum[index] - memoisation.plogp_sum[index] / memoisation.sum[index];
	}
	// If there is no patterns possible in the cell, then there is a
	// contradiction.
	if (memoisation.nb_patterns[index] == 0)
	{
		is_impossible = true;
		//todo: print imposible pattern
	}
	return is_impossible;
}

Idea is after removing some wave patterns manually, to be able to add some waves patterns, if needed.
But no matter what i do, even if I call this before propagate, algorithm always fails.
Can this work at all? Maybe someone can point or give a hint why this wont work?