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+read_verilog mux.v
+proc
+flatten
+equiv_opt -assert -map +/efinix/cells_sim.v synth_efinix # equivalency check
+design -load postopt # load the post-opt design (otherwise equiv_opt loads the pre-opt design)
+cd top # Constrain all select calls below inside the top module
+select -assert-count 13 t:EFX_LUT4
+select -assert-none t:EFX_LUT4 %% t:* %D