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library IEEE; use IEEE.std_logic_1164.ALL; use IEEE.numeric_std.ALL; entity exp is port ( clk : in std_logic ); end entity exp; architecture behav of exp is begin end architecture behav; vunit exp_formal (exp(behav)) { signal any_nat : natural; attribute anyconst : boolean; attribute anyconst of any_nat : signal is true; default Clock is rising_edge(clk); assume always any_nat >=10; assert always any_nat >=10; } cation/atom+xml'/>