pan: non-progress cycle (at depth 51) pan: wrote task5_assert.pml.trail (Spin Version 5.2.4 -- 2 December 2009) Warning: Search not completed + Partial Order Reduction Full statespace search for: never claim + assertion violations - (disabled by -A flag) non-progress cycles + (fairness disabled) invalid end states - (disabled by never claim) State-vector 48 byte, depth reached 57, errors: 1 38 states, stored (41 visited) 17 states, matched 58 transitions (= visited+matched) 4 atomic steps hash conflicts: 0 (resolved) 2.501 memory usage (Mbyte) pan: elapsed time 0.003 seconds