Length parameter ignored for AVL-Tree and Binary Search Tree

[ercksen]

The flag for the number of operations used to construct AVL trees or binary search trees (-l) seems to be ignored. The actual number of operations used is always random, even though the task descriptions state:

The flag -l specifies how many operations should be performed on the tree for generated instances

Steps to reproduce in a bash (commands output the number of actual operations generated):

For AVL-Tree:

java -jar exercisegenerator.jar -a avltree -l 6 -t /dev/null | grep '\\item' | wc -l

For Binary Search Tree:

java -jar exercisegenerator.jar -a binsearchtree -l 6 -t /dev/null | grep '\\item' | wc -l

Expected output: 6
Actual output: Random

Furthermore, it can happen that no operations are generated at all, e.g. the commands output 0.