Some automata seem to spawn satan

[tfiedor]

During working on perfomance-testing infrastructure, I noticed that few automata (that I have personally chosen) seems to spawn satan when run with unary-operations.cc binary.

The issue: the program/library consumes excessive amount of working memory (more than 10GB).

Possible cause: The issue seem to be in complement()

Offending input automata
https://github.com/VeriFIT/mata/blob/devel/tests-performance/automata/b-hand-made-easy/aut1.mata
https://github.com/VeriFIT/mata/blob/devel/tests-performance/automata/b-param-easy/aut0.mata
https://github.com/VeriFIT/mata/blob/devel/tests-performance/automata/b-param-easy/aut1.mata
https://github.com/VeriFIT/mata/blob/devel/tests-performance/automata/b-param-hardest/aut1.mata
https://github.com/VeriFIT/mata/blob/devel/tests-performance/automata/b-param-hardest/aut2.mata

Offending binary: https://github.com/VeriFIT/mata/blob/devel/tests-performance/src/unary-operations.cc

Reproducing:

1. Build the unary-operations.cc
2. Run ./build/tests-integration/unary-operations ./tests-integration/automata/b-hand-made-easy/aut1.mata (using newest infstracture)or ./tests-performance/bin/unary-operations ./tests-performance/automata/b-hand-made-easy/aut1.mata`

[tfiedor]

This might be interesting for @vhavlena, who is optimizing complement among others.