[options]
mode cover
depth 5
expect pass,fail

[engines]
smtbmc boolector

[script]
read -sv test.v
prep -top test

[file test.v]
module test(
input clk,
input rst,
output reg [3:0] count
);

initial assume (rst == 1'b1);

always @(posedge clk) begin
if (rst)
  count <= 4'b0;
else
  count <= count + 1'b1;

cover (count == 0 && !rst);
cover (count == 4'd11 && !rst);
end
endmodule