/export/starexec/sandbox2/solver/bin/starexec_run_ttt2 /export/starexec/sandbox2/benchmark/theBenchmark.xml /export/starexec/sandbox2/output/output_files


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failure 'Failure("No result of SMT solver - maybe due to some flag of the solver? or the solver was not found in PATH?")' in subprocess 8893
failure 'Failure("No result of SMT solver - maybe due to some flag of the solver? or the solver was not found in PATH?")' in subprocess 9526
MAYBE

Problem:
 isList(nil()) -> tt()
 isList(Cons(x,xs)) -> isList(xs)
 downfrom(0()) -> nil()
 downfrom(s(x)) -> Cons(s(x),downfrom(x))
 f(x) -> cond(isList(downfrom(x)),s(x))
 cond(tt(),x) -> f(x)

Proof:
 Open