vunit psl_vunit_vu (psl_vunit(beh)) {


  -- All is sensitive to rising edge of clk
  default clock is rising_edge(clk);

  gen_0 : if FORMAL = "SERE_0" or formal = "ALL" generate
    -- This assertion holds
    SERE_0_a : assert {a};
  end generate gen_0;

  gen_1 : if FORMAL = "SERE_1" or formal = "ALL" generate
    -- This assertion holds
    SERE_1_a : assert {a; a};
  end generate gen_1;

  gen_2 : if FORMAL = "SERE_2" or formal = "ALL" generate
    -- This assertion holds
    SERE_2_a : assert {a; a and b};
  end generate gen_2;

  gen_3 : if FORMAL = "SERE_3" or formal = "ALL" generate
    -- This assertion doesn't hold at cycle 2
    SERE_3_a : assert always {a; a};
  end generate gen_3;


}