3 # counting_sort # randomly fail with Z3
7 # kmp # randomly fail with z3 4.8.4
9 # mergesort_array # fail with Alt-Ergo 2.3.0
11 # rightmostbittrick # randomly fail with CVC4 1.5
12 # sieve # fail with Alt-Ergo 2.3.0
13 # sudoku # some goals are too long for the continuous integration
15 # tree_of_list # uses Alt-Ergo 2.2.0 and CVC4 1.6
17 # warshall_algorithm # fail with Alt-Ergo 2.3.0