Regression: Genome Aligner hangs up

Scenario:

1. Select "Tools->NGS data analysis->Map reads to reference".
2. In the appeared "Align Sequencing Reads" dialog set input parameters:
   • Reference sequence: "_common_data/genome_aligner/chrY.fa",
   • Short reads: "_common_data/genome_aligner/shortreads15Mb.fasta",
   • Mismatches allowed: checked.
3. Press "Start".
   Current result: Subtask "GenomeAlignerFindTask" is running too long, progress is 4% all the time. Note that the task can be canceled.

Affected test:
GUITest_regression_scenarios_test_2778 failed with the following message: "Dna assembly task: State_Running".