diff --git a/assertion.sv b/assertion.sv
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+module axi_asserttions;
+
+
+//////  handshaking for awvalid & awready
+
+property pro;
+
+@(posedge clk)
+disable iff(reset)
+
+(awvalid && !awready) |=> (awvalid && awready) ##1 (!awvalid && !awready);
+
+
+endproperty
+
+
+property pro_n;
+disable iff(reset)
+
+!($isunknown({awaddr,awlen,awsize,awburst,awvalid})& awburst=2'b 10) |-> (awaddr%(2**awsize)==0)
+
+
+endproperty