And the loop invariants
15.1.1:::LOOP 1107 samples
All elements in [-100..100] (200 values)
sum(B) in [-556..539] (96 values)
B[0] nonzero in [-99..96] (79 values)
B[-1] in [-88..99] (80 values)
All elements in [-100..100] (200 values)
B[0] != B[-1] (100 values)