/export/starexec/sandbox2/solver/bin/starexec_run_ttt2-1.17+nonreach /export/starexec/sandbox2/benchmark/theBenchmark.xml /export/starexec/sandbox2/output/output_files


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MAYBE

Problem:
 active(f(X,X)) -> mark(f(a(),b()))
 active(b()) -> mark(a())
 active(f(X1,X2)) -> f(active(X1),X2)
 f(mark(X1),X2) -> mark(f(X1,X2))
 proper(f(X1,X2)) -> f(proper(X1),proper(X2))
 proper(a()) -> ok(a())
 proper(b()) -> ok(b())
 f(ok(X1),ok(X2)) -> ok(f(X1,X2))
 top(mark(X)) -> top(proper(X))
 top(ok(X)) -> top(active(X))

Proof:
 Open