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//-------------------------------------------------------------------------
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//                      www.verificationguide.com
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//-------------------------------------------------------------------------
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class packet;
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  rand bit [3:0] addr;
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  constraint addr_range { soft addr > 6; }
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endclass
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​
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module soft_constr;
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  initial begin
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    packet pkt;
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    pkt = new();
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    repeat(2) begin
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      pkt.randomize() with { addr < 6;};
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      $display("\taddr = %0d",pkt.addr);
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    end
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  end
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endmodule
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// Code your design here
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