Sync bouncer counter
Sync bouncer counter is an informal class of Turing machines. A typical Turing machine in this class has the following behavior:
- It has both a bouncer and a counter on the tape, and the lowest digit of the counter is adjacent to the bouncer.
- Increment: the counter is increased by one, and the bouncer finishes a period.
- Overflow: when the counter overflows, the bouncer changes its structure (and change back before next overflow).
A Coq proof of a kind of typical behavior doesn't halt.
Examples
1RB0LF_0RC---_1RD1LE_0RE0LA_1LF0RF_0LC0LB (most common)