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module main;
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reg a, b;
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always @(a or b) begin
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if ($ivlh_attribute_event(a))
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$display("%0t: EVENT on a", $time);
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if ($ivlh_attribute_event(b))
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$display("%0t: EVENT on b", $time);
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end
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initial begin
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#1 a <= 1;
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#1 b <= 1;
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#1 a <= 0;
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#1 b <= 0;
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#1 $finish(0);
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end
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endmodule // main
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