[tasks]
smtbmc_pass: smtbmc pass
smtbmc_fail: smtbmc fail
aigbmc_pass: aigbmc pass
aigbmc_fail: aigbmc fail
btormc_pass: btormc pass
btormc_fail: btormc fail
abc_pass: abc pass
abc_fail: abc fail

[options]
mode bmc
pass: expect pass
fail: expect fail
pass: depth 5
fail: depth 6

[engines]
smtbmc: smtbmc boolector
aigbmc: aiger aigbmc
btormc: btor btormc
abc: abc bmc3

[script]
read -formal top.sv
prep -top top

[file top.sv]
module top(input clk);
    reg [7:0] counter = 0;

    always @(posedge clk) begin
        counter <= counter + 1;
        assert (counter < 4);
    end
endmodule