[tasks]
smtbmc_pass: smtbmc pass
smtbmc_fail: smtbmc fail
btormc_pass: btormc pass
btormc_fail: btormc fail

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

skip 2

[engines]
smtbmc: smtbmc boolector
[engines bmc]
btormc: btor btormc

[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