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+read_verilog tribuf.v
+hierarchy -top tristate
+proc
+flatten
+equiv_opt -assert -map +/anlogic/cells_sim.v -map +/simcells.v synth_anlogic # equivalency check
+design -load postopt # load the post-opt design (otherwise equiv_opt loads the pre-opt design)
+cd tristate # Constrain all select calls below inside the top module
+select -assert-count 1 t:$_TBUF_
+select -assert-none t:$_TBUF_ %% t:* %D