Segment: Bad bounds for computing probability.

+1 missing for taking into account the number of potential kmers.
<= n for taking into account the (rare) case where all the affectations
would be set.

algo/core/segment.cpp

@@ -363,13 +363,13 @@ KmerMultiSegmenter::KmerMultiSegmenter(Sequence seq, MultiGermline *multigermlin
 double KmerSegmenter::getProbabilityAtLeastOrAbove(int at_least) const {
 
   // n: number of kmers in the sequence
-  int n = getSequence().sequence.size() - getKmerAffectAnalyser()->getIndex().getS();
+  int n = getSequence().sequence.size() - getKmerAffectAnalyser()->getIndex().getS() + 1;
   float index_load = getKmerAffectAnalyser()->getIndex().getIndexLoad() ;
 
   double proba = 0;
   double probability_having_system = pow(index_load, at_least);
   double probability_not_having_system = pow(1 - index_load, n - at_least);
-  for (int i=at_least; i<n; i++) {
+  for (int i=at_least; i<=n; i++) {
     proba += nChoosek(n, i) * probability_having_system * probability_not_having_system;
     probability_having_system *= index_load;
     probability_not_having_system /= index_load;