My program is getting hung up somewhere in the function `evolveRealization`

and while it is stuck its memory usage is increasing by around 1MB per second! While it is building up generations, it was designed to only use the most recent one, and the old ones should be freed. So where is this memory leak coming from?

```
#include "stdafx.h"
#include "types.h"
#include "pitch.h"
#include "chord.h"
#include "phrase.h"
#include "realization.h"
ACTUAL_CHORD randomActualChord(CHORD_SYMBOL *chordSymbol)
{
ACTUAL_CHORD actualChord;
PITCH *pitches;
pitches = chordSymbolPitches(chordSymbol);
actualChord.soprano = pitches[rand() % ((chordSymbol->quality >= major7) ? 4 : 3)];
actualChord.alto = pitches[rand() % ((chordSymbol->quality >= major7) ? 4 : 3)];
actualChord.tenor = pitches[rand() % ((chordSymbol->quality >= major7) ? 4 : 3)];
actualChord.bass = pitches[rand() % ((chordSymbol->quality >= major7) ? 4 : 3)];
return actualChord;
}
//return pointer must be freed
ACTUAL_CHORD *randomRealization(int length, CHORD_SYMBOL *sequence)
{
ACTUAL_CHORD *realization;
int i;
realization = malloc(sizeof(ACTUAL_CHORD) * length);
if(!realization)
return NULL;
for(i = 0; i < length; i++)
{
realization[i] = randomActualChord(&sequence[i]);
}
return realization;
}
int calcFitnessRealization(int length, REALIZATION realization, SEQUENCE sequence)
{
PITCH *pitches;
int fitness = 0;
int count;
int diff;
bool bad;
int i;
for(i = 0; i < length; i++)
{
bad = false;
pitches = chordSymbolPitches(&sequence[i]);
if(!pitches)
return -1;
if(!pitchEquals(realization[i].bass, pitches[sequence[i].inversion]))
bad = true; //wrong inversion
else if(!pitchEquals(realization[i].soprano, pitches[0]) &&
!pitchEquals(realization[i].alto, pitches[0]) &&
!pitchEquals(realization[i].tenor, pitches[0]) &&
!pitchEquals(realization[i].bass, pitches[0]))
bad = true; //missing root of the chord
else if(!pitchEquals(realization[i].soprano, pitches[1]) &&
!pitchEquals(realization[i].alto, pitches[1]) &&
!pitchEquals(realization[i].tenor, pitches[1]) &&
!pitchEquals(realization[i].bass, pitches[1]))
bad = true; //missing third of the chord
else if(!pitchEquals(realization[i].soprano, pitches[2]) &&
!pitchEquals(realization[i].alto, pitches[2]) &&
!pitchEquals(realization[i].tenor, pitches[2]) &&
!pitchEquals(realization[i].bass, pitches[2]))
bad = true; //missing fifth of the chord
else if(sequence[i].quality >= major7 &&
!pitchEquals(realization[i].soprano, pitches[3]) &&
!pitchEquals(realization[i].alto, pitches[3]) &&
!pitchEquals(realization[i].tenor, pitches[3]) &&
!pitchEquals(realization[i].bass, pitches[3]))
bad = true; //missing seventh of the chord
else
{
if(sequence[i].inversion == 0)
{
count = 0;
if(pitchEquals(realization[i].soprano, pitches[0]))
count++;
if(pitchEquals(realization[i].alto, pitches[0]))
count++;
if(pitchEquals(realization[i].tenor, pitches[0]))
count++;
if(pitchEquals(realization[i].bass, pitches[0]))
count++;
if(count < 2)
bad = true; //root not doubled
}
else if(sequence[i].inversion == 1)
{
count = 0;
if(pitchEquals(realization[i].soprano, pitches[0]))
count++;
if(pitchEquals(realization[i].alto, pitches[0]))
count++;
if(pitchEquals(realization[i].tenor, pitches[0]))
count++;
if(pitchEquals(realization[i].bass, pitches[0]))
count++;
if(count < 2)
{
count = 0;
if(pitchEquals(realization[i].soprano, realization[i].soprano))
count++;
if(pitchEquals(realization[i].alto, realization[i].soprano))
count++;
if(pitchEquals(realization[i].tenor, realization[i].soprano))
count++;
if(pitchEquals(realization[i].bass, realization[i].soprano))
count++;
if(count < 2)
bad = true; //root or soprano not doubled
}
}
else if(sequence[i].inversion == 2)
{
count = 0;
if(pitchEquals(realization[i].soprano, pitches[2]))
count++;
if(pitchEquals(realization[i].alto, pitches[2]))
count++;
if(pitchEquals(realization[i].tenor, pitches[2]))
count++;
if(pitchEquals(realization[i].bass, pitches[2]))
count++;
if(count < 2)
bad = true; //fifth not doubled
}
}
free(pitches);
if(!bad)
++fitness;
if(i > 0)
{
bad = false;
diff = absInterval(realization[i - 1].soprano, realization[i - 1].alto);
if(diff == 0 || diff == 7)
if(absInterval(realization[i].soprano, realization[i].alto) == diff &&
!pitchEquals(realization[i - 1].soprano, realization[i].alto))
bad = true; //parallel octave/fifth between soprano-alto
diff = absInterval(realization[i - 1].alto, realization[i - 1].tenor);
if(diff == 0 || diff == 7)
if(absInterval(realization[i].alto, realization[i].tenor) == diff &&
!pitchEquals(realization[i - 1].alto, realization[i].tenor))
bad = true; //parallel octave/fifth between alto-tenor
diff = absInterval(realization[i - 1].tenor, realization[i - 1].bass);
if(diff == 0 || diff == 7)
if(absInterval(realization[i].tenor, realization[i].bass) == diff &&
!pitchEquals(realization[i - 1].tenor, realization[i].bass))
bad = true; //parallel octave/fifth between tenor-bass
diff = absInterval(realization[i - 1].soprano, realization[i - 1].tenor);
if(diff == 0 || diff == 7)
if(absInterval(realization[i].soprano, realization[i].tenor) == diff &&
!pitchEquals(realization[i - 1].soprano, realization[i].tenor))
bad = true; //parallel octave/fifth between soprano-tenor
diff = absInterval(realization[i - 1].alto, realization[i - 1].bass);
if(diff == 0 || diff == 7)
if(absInterval(realization[i].alto, realization[i].bass) == diff &&
!pitchEquals(realization[i - 1].alto, realization[i].bass))
bad = true; //parallel octave/fifth between alto-bass
diff = absInterval(realization[i - 1].soprano, realization[i - 1].bass);
if(diff == 0 || diff == 7)
if(absInterval(realization[i].soprano, realization[i].bass) == diff &&
!pitchEquals(realization[i - 1].soprano, realization[i].bass))
bad = true; //parallel octave/fifth between soprano-bass
}
}
return fitness;
}
ACTUAL_CHORD **getEliteRealizations(int length, REALIZATION *generation, SEQUENCE sequence, int generationSize, int eliteSize)
{
ACTUAL_CHORD **elite;
int *fitnesses;
int *sequences;
bool swapped;
int temp;
int i;
elite = malloc(sizeof(PHRASE) * eliteSize);
if(!elite)
return NULL;
fitnesses = malloc(sizeof(int) * generationSize);
if(!fitnesses)
return NULL;
sequences = malloc(sizeof(int) * generationSize);
if(!sequences)
return NULL;
for(i = 0; i < generationSize; i++)
{
fitnesses[i] = calcFitnessRealization(length, generation[i], sequence);
if(fitnesses[i] == -1)
return NULL;
sequences[i] = i;
}
//bubble sort
do
{
swapped = false;
for(i = 1; i < generationSize; i++)
{
if(fitnesses[i] > fitnesses[i - 1])
{
temp = fitnesses[i];
fitnesses[i] = fitnesses[i - 1];
fitnesses[i - 1] = temp;
temp = sequences[i];
sequences[i] = sequences[i - 1];
sequences[i - 1] = temp;
swapped = true;
}
}
} while(swapped);
for(i = 0; i < eliteSize; i++)
{
if(!copyRealization(length, &elite[i], &generation[sequences[i]]))
return NULL;
}
free(fitnesses);
free(sequences);
return elite;
}
ACTUAL_CHORD *spawnRealization(int length, SEQUENCE sequence, ACTUAL_CHORD *parent1, ACTUAL_CHORD *parent2, double mutationProb)
{
REALIZATION realization;
int i;
realization = malloc(sizeof(ACTUAL_CHORD) * length);
if(!realization)
return NULL;
for(i = 0; i < length; i++)
{
if(rand() / (double)RAND_MAX < mutationProb)
{
realization[i] = randomActualChord(&sequence[i]);
}
else
{
/*realization[i].soprano = (rand() % 2) ? parent1[i].soprano : parent2[i].soprano;
realization[i].alto = (rand() % 2) ? parent1[i].alto : parent2[i].alto;
realization[i].tenor = (rand() % 2) ? parent1[i].tenor : parent2[i].tenor;
realization[i].bass = (rand() % 2) ? parent1[i].bass : parent2[i].bass;*/
realization[i] = (rand() % 2) ? parent1[i] : parent2[i];
}
}
return realization;
}
ACTUAL_CHORD *evolveRealization(int length, SEQUENCE sequence, int generationSize, int eliteSize, double mutationProb)
{
REALIZATION *generation;
REALIZATION *elite;
ACTUAL_CHORD *best;
int max = 0;
int parent1, parent2;
int fitness;
int i;
//init 0 generation
generation = malloc(generationSize * sizeof(ACTUAL_CHORD *));
if(!generation)
return NULL;
for(i = 0; i < generationSize; i++)
{
generation[i] = randomRealization(length, sequence);
if(!generation[i])
return NULL;
}
while(max < length)
{
elite = getEliteRealizations(length, generation, sequence, generationSize, eliteSize);
if(!elite)
return NULL;
for(i = 0; i < generationSize; i++)
{
free(generation[i]);
parent1 = rand() % eliteSize;
parent2 = rand() % eliteSize;
generation[i] = spawnRealization(length, sequence, elite[parent1], elite[parent2], mutationProb);
if(!generation[i])
return NULL;
fitness = calcFitnessRealization(length, generation[i], sequence);
if(fitness == -1)
return NULL;
if(fitness > max)
{
max = fitness;
printf("%d%%\n", max * 100 / length);
//best = generation[i];
if(!copyRealization(length, &best, &generation[i]))
return NULL;
}
}
for(i = 0; i < eliteSize; i++)
{
free(elite[i]); //get rid of old sequence
}
free(elite);
}
for(i = 0; i < generationSize; i++)
{
free(generation[i]);
}
free(generation);
return best;
}
```

The other files really aren't relevant; the only external function that allocated memory is `chordPitches`

and the memory from that is clearly freed. I have looked the entire thing over many times and I am still clueless. Is there something I am missing?