diff --git a/axi interface.sv b/axi interface.sv
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+Interface intf(input bit clock,bit reset);
+
+/////////////////write_address channel///////////////////
+ input rand bit [3:0] awid;
+ input rand logic [31:0]awaddr;
+ input rand logic [3:0] awlen;
+ input rand logic [2:0] awsize;
+ input rand logic [1:0] awburst;
+ input logic awvalid;
+ output logic awready;
+
+////////////write_data channel///////////////////////////
+
+input rand bit[3:0] wid;
+input rand logic [31:0]wdata[];
+input logic [3:0]wstrb;
+input logic wlast;
+input logic wvalid;
+output logic wready;
+
+//////////write_response channel////////////////////////
+
+output bit [3:0]bid;
+output logic [1:0]bresp;
+output logic bvalid;
+input logic bready;
+
+/////////////read_address//////////////////////////////
+
+ input randc bit [3:0] arid;
+ input rand logic [31:0]araddr;
+ input rand logic [3:0]arlen;
+ input rand logic [2:0]arsize;
+ input rand logic [1:0]arburst;
+ input logic arvalid;
+ output logic arready;
+
+//////////////read_data/////////////////////////////
+ input bit [3:0] rid;
+ input logic [31:0]rdata[];
+ output logic [1:0]rresp;
+ output logic rlast;
+ output logic rvalid;
+ input logic rready;
+
+
+///Value of 2'b11 on AWBURST is not permitted when AWVALID is high///
+
+property p;
+@(posedge clk) awvalid |-> !(awburst==2'b11);
+endproperty
+
+assert property(p);
+$display("assertion pass")
+else
+$uvm_fatal("assertion fail")
+
+
+///When AWVALID is high,AWADDR cannot be unknown values////
+
+property p1;
+@(posedge clk) awvalid |-> !($isunknown(awaddr)) ;
+endproperty
+
+assert property(p1)
+$display("assertion pass")
+else
+$uvm_fatal("assertion fail")
+
+
+
+///WVALID can assert before AWVALID///
+
+property p2;
+@(posedge clk) wvalid |=> awvalid;
+endproperty
+
+assert property(p2)
+$display("assertion pass")
+else
+$uvm_fatal("assertion fail")
+
+
+///AWREADY should  be asserted before or after AWVALID is asserted////
+
+property p3;
+@(posedge clk) awready |=> awvalid;
+endproperty
+
+assert property(p3)
+$display("assertion pass")
+else
+$uvm_fatal("assertion fail")
+
+
+
+
+
+
+
+
+
+