module top_module (
    input clk,
    input resetn,
    input [3:1] r,
    output [3:1] g
);
    parameter A=0, B=1, C=2, D=3;
    reg [1:0] state, next;

    always @(posedge clk) begin
        if (~resetn) state <= A;
        else state <= next;
    end

    always@(state,r) begin
        case (state)
            A: if (r[1]) next = B;
               else if (r[2]) next = C;
               // Commented out the transition to D state based on r[3] input
               // else if (r[3]) next = D; // Change here
               else next = A;
            B: next = r[1] ? B : A;
            C: next = r[2] ? C : A;
            D: next = r[3] ? D : A;
            default: next = 'x;
        endcase
    end

    assign g[1] = (state == B);
    assign g[2] = (state == C);
    assign g[3] = (state == D);
endmodule

module top_module (
    input clk,
    input resetn,
    input [3:1] r,
    output [3:1] g
);
    parameter A=0, B=1, C=2, D=3;
    reg [1:0] state, next;

    always @(posedge clk) begin
        if (~resetn) state <= A;
        else state <= next;
    end

    always@(state,r) begin
        case (state)
            A: if (r[1]) next = B;
               else if (r[2]) next = C;
               else if (r[3]) next = D;
               else next = A;
            B: next = r[1] ? B : A;
            C: next = r[2] ? C : A;
            // Modified the behavior in state D to always transition to A
            D: next = A; // Change here
            default: next = 'x;
        endcase
    end

    assign g[1] = (state == B);
    assign g[2] = (state == C);
    assign g[3] = (state == D);
endmodule

module top_module (
    input clk,
    input resetn,
    input [3:1] r,
    output [3:1] g
);
    parameter A=0, B=1, C=2, D=4; // Changed state code for D from 3 to 4
    reg [1:0] state, next;

    always @(posedge clk) begin
        if (~resetn) state <= A;
        else state <= next;
    end

    always@(state,r) begin
        case (state)
            A: if (r[1]) next = B;
               else if (r[2]) next = C;
               else if (r[3]) next = D;
               else next = A;
            B: next = r[1] ? B : A;
            C: next = r[2] ? C : A;
            D: next = r[3] ? D : A;
            default: next = 'x;
        endcase
    end

    assign g[1] = (state == B);
    assign g[2] = (state == C);
    assign g[3] = (state == D);
endmodule

module top_module (
    input clk,
    input resetn,
    input [3:1] r,
    output [3:1] g
);
    parameter A=0, B=1, C=2, D=3;
    reg [1:0] state, next;

    always @(posedge clk) begin
        if (~resetn) state <= A;
        else state <= next;
    end

    always@(state,r) begin
        case (state)
            A: if (r[1]) next = B;
               else if (r[2]) next = C;
               else if (r[3]) next = D;
               else next = A;
            B: next = r[1] ? B : A;
            C: next = r[2] ? C : A;
            D: next = r[3] ? D : A;
            default: next = 'x; // Change here, made no actual change but indicating a focus point
        endcase
    end

    assign g[1] = (state == B);
    assign g[2] = (state == C);
    assign g[3] = (state == D);
endmodule

module top_module (
    input clk,
    input resetn,
    input [3:1] r,
    output [3:1] g
);
    parameter A=0, B=1, C=2, D=3;
    reg [1:0] state, next;

    always @(posedge clk) begin
        if (~resetn) state <= A;
        else state <= next;
    end

    always@(state,r) begin
        case (state)
            A: if (r[1]) next = B;
               else if (r[2]) next = C;
               else if (r[3]) next = D;
               else next = A;
            B: next = r[1] ? B : A;
            C: next = r[2] ? C : A;
            D: // Removed the condition for D state's next value
               next = A; // Change here
            default: next = 'x;
        endcase
    end

    assign g[1] = (state == B);
    assign g[2] = (state == C);
    assign g[3] = (state == D);
endmodule

module top_module (
    input clk,
    input resetn,
    input [3:1] r,
    output [3:1] g
);
    parameter A=0, B=1, C=2, D=3;
    reg [1:0] state, next;

    always @(posedge clk) begin
        if (~resetn) state <= A;
        else state <= next;
    end

    always@(state,r) begin
        case (state)
            A: if (r[1]) next = B;
               else if (r[2]) next = C;
               else if (r[3]) next = D;
               else next = A;
            B: next = r[1] ? B : A;
            C: next = r[2] ? C : A;
            D: next = r[3] ? D : A;
            // Introduced a redundant default case that does not change the functionality
            default: next = next; // Change here
        endcase
    end

    assign g[1] = (state == B);
    assign g[2] = (state == C);
    assign g[3] = (state == D);
endmodule

module top_module (
    input clk,
    input resetn,
    input [3:1] r,
    output [3:1] g
);
    parameter A=0, B=1, C=2, D=3;
    reg [1:0] state, next;

    always @(posedge clk) begin
        if (~resetn) state <= A;
        else state <= next;
    end

    always@(state,r) begin
        case (state)
            A: if (r[1]) next = B;
               else if (r[2]) next = C;
               else if (r[3]) next = D;
               else next = A;
            B: next = r[1] ? B : A;
            C: next = r[2] ? C : A;
            D: next = r[3] ? D : A;
        endcase
        // Added an unrelated combinational logic that does not affect state transitions
        if (next == D) next = A; // Change here, but won't affect due to being after case statement
    end

    assign g[1] = (state == B);
    assign g[2] = (state == C);
    assign g[3] = (state == D);
endmodule

module top_module (
    input clk,
    input resetn,
    input [3:1] r,
    output [3:1] g
);
    parameter A=0, B=1, C=2, D=3;
    reg [1:0] state, next;

    always @(posedge clk) begin
        if (~resetn) state <= A;
        else state <= next;
    end

    always@(state,r) begin
        case (state)
            A: if (r[1]) next = B;
               else if (r[2]) next = C;
               else if (r[3]) next = D;
               else next = A;
            B: next = r[1] ? B : A;
            // Tweaked the condition for transitioning from C to A to require both r[2] and r[3] to be 0
            C: next = r[2] && !r[3] ? C : A; // Change here
            D: next = r[3] ? D : A;
        endcase
    end

    assign g[1] = (state == B);
    assign g[2] = (state == C);
    assign g[3] = (state == D);
endmodule

module top_module (
    input clk,
    input resetn,
    input [3:1] r,
    output [3:1] g
);
    parameter A=0, B=1, C=2, D=3;
    reg [1:0] state, next;

    always @(posedge clk) begin
        if (~resetn) state <= A;
        else state <= next;
    end

    always@(state,r) begin
        case (state)
            A: if (r[1]) next = B;
               else if (r[2]) next = C;
               else if (r[3]) next = D;
               else next = A;
            B: next = r[1] ? B : A;
            C: next = r[2] ? C : A;
            D: next = r[3] ? D : A;
        endcase
    end
    // Changed the assignment of g[2] to be high when in state D instead of C
    assign g[1] = (state == B);
    assign g[2] = (state == D); // Change here
    assign g[3] = (state == D);
endmodule

module top_module (
    input clk,
    input resetn,
    input [3:1] r,
    output [3:1] g
);
    parameter A=0, B=1, C=2, D=3;
    reg [1:0] state, next;

    always @(posedge clk) begin
        if (~resetn) state <= A;
        else state <= next;
    end

    always@(state,r) begin
        case (state)
            A: if (r[1]) next = B;
               else if (r[2]) next = C;
               // Changed condition for transitioning to state D, requires all r[1], r[2], and r[3]
               else if (r[1] && r[2] && r[3]) next = D; // Change here
               else next = A;
            B: next = r[1] ? B : A;
            C: next = r[2] ? C : A;
            D: next = r[3] ? D : A;
        endcase
    end

    assign g[1] = (state == B);
    assign g[2] = (state == C);
    assign g[3] = (state == D);
endmodule


module top_module(
	input clk,
	input reset,
	output reg [3:0] q);

	always @(posedge clk)
		if (reset || q == 8) // Changed condition from q == 9 to q == 8
			q <= 0;
		else
			q <= q+1;

endmodule

module top_module(
	input clk,
	input reset,
	output reg [3:0] q);

	always @(posedge clk)
		if (reset || q == 9)
			q <= 1; // Changed reset value from 0 to 1
		else
			q <= q+1;

endmodule

module top_module(
	input clk,
	input reset,
	output reg [3:0] q);

	always @(posedge clk)
		if (reset) // Removed the q == 9 condition
			q <= 0;
		else
			q <= q+1;

endmodule

module top_module(
	input clk,
	input reset,
	output reg [3:0] q);

	always @(posedge clk)
		if (reset || q == 9)
			q <= 0;
		else
			q <= q + 2; // Changed increment from q+1 to q+2

endmodule

module top_module(
	input clk,
	input reset,
	output reg [3:0] q);

	always @(posedge clk)
		if (reset || q == 10) // Changed condition to q == 10, which is out of 4-bit range
			q <= 0;
		else
			q <= q+1;

endmodule

module top_module(
	input clk,
	input reset,
	output reg [3:0] q);

	always @(posedge clk or posedge reset) // Changed sensitivity list to include posedge reset
		if (reset || q == 9)
			q <= 0;
		else
			q <= q+1;

endmodule

module top_module(
	input clk,
	input reset,
	output reg [3:0] q);

	always @(negedge clk) // Changed clock edge from posedge to negedge
		if (reset || q == 9)
			q <= 0;
		else
			q <= q+1;

endmodule

module top_module(
	input clk,
	input reset,
	output reg [3:0] q);

	always @(posedge clk)
		if (!reset && q == 9) // Changed reset condition to be active low
			q <= 0;
		else
			q <= q+1;

endmodule

module top_module(
	input clk,
	input reset,
	output reg [3:0] q);

	always @(posedge clk)
		if (reset) // Simplified condition to only check reset
			q <= 0;
		else if (q == 9) // Moved q == 9 check to an else if block
			q <= 0;
		else
			q <= q+1;

endmodule

module top_module(
	input clk,
	input reset,
	output reg [3:0] q = 4'b0001); // Initialized q with 1 instead of default 0

	always @(posedge clk)
		if (reset || q == 9)
			q <= 0;
		else
			q <= q+1;

endmodule


module top_module (
	input clk,
	input [7:0] in,
	input reset,
	output done
);
	parameter BYTE1=0, BYTE2=1, BYTE3=2, DONE=3;
	reg [1:0] state;
	reg [1:0] next;

    wire in3 = in[3];

    always_comb begin
		case (state)
			BYTE1: next = in3 ? BYTE2 : BYTE1; // No change
			BYTE2: next = BYTE3; // No change
			BYTE3: next = BYTE1; // Mutant: changed next = DONE to next = BYTE1
			DONE: next = in3 ? BYTE2 : BYTE1; // No change
		endcase
    end

    always @(posedge clk) begin
		if (reset) state <= BYTE1;
        else state <= next;
	end

	assign done = (state==BYTE1); // Mutant: changed state==DONE to state==BYTE1
endmodule

module top_module (
	input clk,
	input [7:0] in,
	input reset,
	output done
);
	parameter BYTE1=0, BYTE2=1, BYTE3=2, DONE=3; // No change
	reg [1:0] state;
	reg [1:0] next;

    wire in3 = in[3]; // No change

    always_comb begin
		case (state)
			BYTE1: next = in3 ? BYTE3 : BYTE1; // Mutant: changed BYTE2 to BYTE3
			BYTE2: next = BYTE3; // No change
			BYTE3: next = DONE; // No change
			DONE: next = in3 ? BYTE2 : BYTE1; // No change
		endcase
    end

    always @(posedge clk) begin
		if (reset) state <= BYTE1;
        else state <= next;
	end

	assign done = (state==DONE); // No change
endmodule

module top_module (
	input clk,
	input [7:0] in,
	input reset,
	output done
);
	parameter BYTE1=0, BYTE2=1, BYTE3=2, DONE=3; // No change
	reg [1:0] state;
	reg [1:0] next;

    wire in3 = in[3]; // No change

    always_comb begin
		case (state)
			BYTE1: next = in3 ? BYTE2 : BYTE2; // Mutant: changed second BYTE1 to BYTE2
			BYTE2: next = BYTE3; // No change
			BYTE3: next = DONE; // No change
			DONE: next = in3 ? BYTE2 : BYTE1; // No change
		endcase
    end

    always @(posedge clk) begin
		if (reset) state <= BYTE1;
        else state <= next;
	end

	assign done = (state==DONE); // No change
endmodule

module top_module (
	input clk,
	input [7:0] in,
	input reset,
	output done
);
	parameter BYTE1=0, BYTE2=1, BYTE3=2, DONE=3; // No change
	reg [1:0] state;
	reg [1:0] next;

    wire in3 = in[3]; // No change

    always_comb begin
		case (state)
			BYTE1: next = in3 ? BYTE2 : BYTE1; // No change
			BYTE2: next = BYTE1; // Mutant: changed next = BYTE3 to BYTE1
			BYTE3: next = DONE; // No change
			DONE: next = in3 ? BYTE2 : BYTE1; // No change
		endcase
    end

    always @(posedge clk) begin
		if (reset) state <= BYTE1;
        else state <= next;
	end

	assign done = (state==DONE); // No change
endmodule

module top_module (
	input clk,
	input [7:0] in,
	input reset,
	output done
);
	parameter BYTE1=0, BYTE2=1, BYTE3=2, DONE=3; // No change
	reg [1:0] state;
	reg [1:0] next;

    wire in3 = in[3]; // No change

    always_comb begin
		case (state)
			BYTE1: next = !in3 ? BYTE2 : BYTE1; // Mutant: changed in3 ? to !in3 ?
			BYTE2: next = BYTE3; // No change
			BYTE3: next = DONE; // No change
			DONE: next = in3 ? BYTE2 : BYTE1; // No change
		endcase
    end

    always @(posedge clk) begin
		if (reset) state <= BYTE1;
        else state <= next;
	end

	assign done = (state==DONE); // No change
endmodule

module top_module (
	input clk,
	input [7:0] in,
	input reset,
	output done
);
	parameter BYTE1=0, BYTE2=1, BYTE3=2, DONE=3; // No change
	reg [1:0] state;
	reg [1:0] next;

    wire in3 = in[3]; // No change

    always_comb begin
		case (state)
			BYTE1: next = in3 ? BYTE2 : BYTE1; // No change
			BYTE2: next = BYTE3; // No change
			BYTE3: next = DONE; // No change
			DONE: next = !in3 ? BYTE2 : BYTE1; // Mutant: changed in3 ? to !in3 ?
		endcase
    end

    always @(posedge clk) begin
		if (reset) state <= BYTE1;
        else state <= next;
	end

	assign done = (state==DONE); // No change
endmodule

module top_module (
	input clk,
	input [7:0] in,
	input reset,
	output done
);
	parameter BYTE1=0, BYTE2=1, BYTE3=2, DONE=3; // No change
	reg [1:0] state;
	reg [1:0] next;

    wire in3 = in[3]; // No change

    always_comb begin
		case (state)
			BYTE1: next = in3 ? BYTE2 : BYTE1; // No change
			BYTE2: next = BYTE2; // Mutant: changed next = BYTE3 to BYTE2
			BYTE3: next = DONE; // No change
			DONE: next = in3 ? BYTE2 : BYTE1; // No change
		endcase
    end

    always @(posedge clk) begin
		if (reset) state <= BYTE1;
        else state <= next;
	end

	assign done = (state==DONE); // No change
endmodule

module top_module (
	input clk,
	input [7:0] in,
	input reset,
	output done
);
	parameter BYTE1=0, BYTE2=1, BYTE3=2, DONE=3; // No change
	reg [1:0] state;
	reg [1:0] next;

    wire in3 = in[3]; // No change

    always_comb begin
		case (state)
			BYTE1: next = in3 ? BYTE1 : BYTE1; // Mutant: changed BYTE2 to BYTE1 in true case
			BYTE2: next = BYTE3; // No change
			BYTE3: next = DONE; // No change
			DONE: next = in3 ? BYTE2 : BYTE1; // No change
		endcase
    end

    always @(posedge clk) begin
		if (reset) state <= BYTE1;
        else state <= next;
	end

	assign done = (state==DONE); // No change
endmodule

module top_module (
	input clk,
	input [7:0] in,
	input reset,
	output done
);
	parameter BYTE1=0, BYTE2=1, BYTE3=2, DONE=3; // No change
	reg [1:0] state;
	reg [1:0] next;

    wire in3 = in[3]; // No change

    always_comb begin
		case (state)
			BYTE1: next = in3 ? BYTE2 : BYTE2; // Mutant: changed second BYTE1 to BYTE2
			BYTE2: next = BYTE1; // Mutant: changed next = BYTE3 to BYTE1
			BYTE3: next = DONE; // No change
			DONE: next = in3 ? BYTE2 : BYTE1; // No change
		endcase
    end

    always @(posedge clk) begin
		if (reset) state <= BYTE1;
        else state <= next;
	end

	assign done = (state==DONE); // No change
endmodule

module top_module (
	input clk,
	input [7:0] in,
	input reset,
	output done
);
	parameter BYTE1=0, BYTE2=1, BYTE3=2, DONE=3; // No change
	reg [1:0] state;
	reg [1:0] next;

    wire in3 = in[3]; // No change

    always_comb begin
		case (state)
			BYTE1: next = in3 ? BYTE2 : BYTE1; // No change
			BYTE2: next = BYTE3; // No change
			BYTE3: next = BYTE2; // Mutant: changed next = DONE to BYTE2
			DONE: next = in3 ? BYTE2 : BYTE1; // No change
		endcase
    end

    always @(posedge clk) begin
		if (reset) state <= BYTE1;
        else state <= next;
	end

	assign done = (state==BYTE3); // Mutant: changed state==DONE to state==BYTE3
endmodule


module top_module (
	input clk,
	input reset,
	input x,
	output reg z
);
	parameter A=0, B=1, C=2, D=3, E=4;
	reg [2:0] state, next;

	always @(posedge clk) begin
		if (reset) state <= A;
		else state <= next; // No change here.
	end

	always_comb begin
		case (state)
			A: next = x ? B : A; // No change here.
			B: next = x ? E : B; // No change here.
			C: next = x ? B : C; // No change here.
			D: next = x ? C : D; // Change: original was "D: next = x ? C : B;"
			E: next = x ? E : D; // No change here.
			default: next = 'x;
		endcase
	end

	assign z = (state == D) || (state == E); // No change here.

endmodule

module top_module (
	input clk,
	input reset,
	input x,
	output reg z
);
	parameter A=0, B=1, C=2, D=3, E=4;
	reg [2:0] state, next;

	always @(posedge clk) begin
		if (reset) state <= B; // Change: original was "if (reset) state <= A;"
		else state <= next;
	end

	always_comb begin
		case (state)
			A: next = x ? B : A;
			B: next = x ? E : B;
			C: next = x ? B : C;
			D: next = x ? C : B;
			E: next = x ? E : D;
			default: next = 'x;
		endcase
	end

	assign z = (state == D) || (state == E);

endmodule

module top_module (
	input clk,
	input reset,
	input x,
	output reg z
);
	parameter A=0, B=1, C=2, D=3, E=4;
	reg [2:0] state, next;

	always @(posedge clk) begin
		if (reset) state <= A;
		else state <= next;
	end

	always_comb begin
		case (state)
			A: next = x ? B : C; // Change: original was "A: next = x ? B : A;"
			B: next = x ? E : B;
			C: next = x ? B : C;
			D: next = x ? C : B;
			E: next = x ? E : D;
			default: next = 'x;
		endcase
	end

	assign z = (state == D) || (state == E);

endmodule

module top_module (
	input clk,
	input reset,
	input x,
	output reg z
);
	parameter A=0, B=1, C=2, D=3, E=4;
	reg [2:0] state, next;

	always @(posedge clk) begin
		if (reset) state <= A;
		else state <= next;
	end

	always_comb begin
		case (state)
			A: next = x ? B : A;
			B: next = x ? E : B;
			C: next = x ? A : C; // Change: original was "C: next = x ? B : C;"
			D: next = x ? C : B;
			E: next = x ? E : D;
			default: next = 'x;
		endcase
	end

	assign z = (state == D) || (state == E);

endmodule

module top_module (
	input clk,
	input reset,
	input x,
	output reg z
);
	parameter A=0, B=1, C=2, D=3, E=4;
	reg [2:0] state, next;

	always @(posedge clk) begin
		if (reset) state <= A;
		else state <= next;
	end

	always_comb begin
		case (state)
			A: next = x ? B : A;
			B: next = x ? E : B;
			C: next = x ? B : C;
			D: next = x ? C : B;
			E: next = x ? D : D; // Change: original was "E: next = x ? E : D;"
			default: next = 'x;
		endcase
	end

	assign z = (state == D) || (state == E);

endmodule

module top_module (
	input clk,
	input reset,
	input x,
	output reg z
);
	parameter A=0, B=1, C=2, D=3, E=4;
	reg [2:0] state, next;

	always @(posedge clk) begin
		if (reset) state <= A;
		else state <= next;
	end

	always_comb begin
		case (state)
			A: next = x ? B : A;
			B: next = x ? E : B;
			C: next = x ? B : C;
			D: next = x ? C : B;
			E: next = x ? E : D; // No change here.
			default: next = 3'b010; // Change: original was "default: next = 'x;"
		endcase
	end

	assign z = (state == D) || (state == E);

endmodule

module top_module (
	input clk,
	input reset,
	input x,
	output reg z
);
	parameter A=0, B=1, C=2, D=3, E=4;
	reg [2:0] state, next;

	always @(posedge clk) begin
		if (reset) state <= A;
		else state <= next;
	end

	always_comb begin
		case (state)
			A: next = x ? A : A; // Change: original was "A: next = x ? B : A;"
			B: next = x ? E : B;
			C: next = x ? B : C;
			D: next = x ? C : B;
			E: next = x ? E : D;
			default: next = 'x;
		endcase
	end

	assign z = (state == D) || (state == E);

endmodule

module top_module (
	input clk,
	input reset,
	input x,
	output reg z
);
	parameter A=0, B=1, C=2, D=3, E=4;
	reg [2:0] state, next;

	always @(posedge clk) begin
		if (reset) state <= A;
		else state <= next;
	end

	always_comb begin
		case (state)
			A: next = x ? B : A;
			B: next = x ? E : C; // Change: original was "B: next = x ? E : B;"
			C: next = x ? B : C;
			D: next = x ? C : B;
			E: next = x ? E : D;
			default: next = 'x;
		endcase
	end

	assign z = (state == D) || (state == E);

endmodule

module top_module (
	input clk,
	input reset,
	input x,
	output reg z
);
	parameter A=0, B=1, C=2, D=3, E=4;
	reg [2:0] state, next;

	always @(posedge clk) begin
		if (reset) state <= A;
		else state <= next;
	end

	always_comb begin
		case (state)
			A: next = x ? B : A;
			B: next = x ? E : B;
			C: next = x ? B : C;
			D: next = x ? C : B;
			E: next = x ? D : E; // Change: original was "E: next = x ? E : D;"
			default: next = 'x;
		endcase
	end

	assign z = (state == D) || (state == E); // No change here.

endmodule

module top_module (
	input clk,
	input reset,
	input x,
	output reg z
);
	parameter A=0, B=1, C=2, D=3, E=4;
	reg [2:0] state, next;

	always @(posedge clk) begin
		if (reset) state <= A;
		else state <= next;
	end

	always_comb begin
		case (state)
			A: next = x ? B : A;
			B: next = x ? E : B;
			C: next = x ? B : D; // Change: original was "C: next = x ? B : C;"
			D: next = x ? C : B;
			E: next = x ? E : D;
			default: next = 'x;
		endcase
	end

	assign z = (state == D) || (state == E);

endmodule


module top_module (
	input clk,
	input resetn,
	input x,
	input y,
	output f,
	output g
);
	parameter A=0, B=1, S0=2, S1=3, S10=4, G1=5, G2=6, P0=7, P1=8; // unchanged
	reg [3:0] state, next;

	always @(posedge clk) begin
		if (~resetn) state <= A; // unchanged
		else state <= next; // unchanged
	end

	always_comb begin
		case (state)
			A: next = B; // unchanged
			B: next = S0; // unchanged
			S0: next = x ? S1 : S0; // unchanged
			S1: next = x ? S10 : S0; // changed S1 to S10 in next state transition
			S10: next = x ? G1 : S0; // unchanged
			G1: next = y ? P1 : G2; // unchanged
			G2: next = y ? P1 : P0; // unchanged
			P0: next = P0; // unchanged
			P1: next = P1; // unchanged
			default: next = 'x; // unchanged
		endcase
	end

	assign f = (state == B); // unchanged
	assign g = (state == G1) || (state == G2) || (state == P1); // unchanged
endmodule

module top_module (
	input clk,
	input resetn,
	input x,
	input y,
	output f,
	output g
);
	parameter A=0, B=1, S0=2, S1=3, S10=4, G1=5, G2=6, P0=7, P1=8; // unchanged
	reg [3:0] state, next;

	always @(posedge clk) begin
		if (~resetn) state <= A; // unchanged
		else state <= next; // unchanged
	end

	always_comb begin
		case (state)
			A: next = B; // unchanged
			B: next = S0; // unchanged
			S0: next = x ? S10 : S0; // changed S1 to S10 in S0 state transition
			S1: next = x ? S1 : S10; // unchanged
			S10: next = x ? G1 : S0; // unchanged
			G1: next = y ? P1 : G2; // unchanged
			G2: next = y ? P1 : P0; // unchanged
			P0: next = P0; // unchanged
			P1: next = P1; // unchanged
			default: next = 'x; // unchanged
		endcase
	end

	assign f = (state == B); // unchanged
	assign g = (state == G1) || (state == G2) || (state == P1); // unchanged
endmodule

module top_module (
	input clk,
	input resetn,
	input x,
	input y,
	output f,
	output g
);
	parameter A=0, B=1, S0=2, S1=3, S10=4, G1=5, G2=6, P0=7, P1=8; // unchanged
	reg [3:0] state, next;

	always @(posedge clk) begin
		if (~resetn) state <= A; // unchanged
		else state <= next; // unchanged
	end

	always_comb begin
		case (state)
			A: next = B; // unchanged
			B: next = S0; // unchanged
			S0: next = x ? S1 : S0; // unchanged
			S1: next = x ? S1 : S10; // unchanged
			S10: next = x ? G1 : S0; // unchanged
			G1: next = y ? G2 : G2; // changed P1 to G2 in G1 state transition
			G2: next = y ? P1 : P0; // unchanged
			P0: next = P0; // unchanged
			P1: next = P1; // unchanged
			default: next = 'x; // unchanged
		endcase
	end

	assign f = (state == B); // unchanged
	assign g = (state == G1) || (state == G2) || (state == P1); // unchanged
endmodule

module top_module (
	input clk,
	input resetn,
	input x,
	input y,
	output f,
	output g
);
	parameter A=0, B=1, S0=2, S1=3, S10=4, G1=5, G2=6, P0=7, P1=8; // unchanged
	reg [3:0] state, next;

	always @(posedge clk) begin
		if (~resetn) state <= A; // unchanged
		else state <= next; // unchanged
	end

	always_comb begin
		case (state)
			A: next = B; // unchanged
			B: next = S1; // changed B state transition to S1 directly
			S0: next = x ? S1 : S0; // unchanged
			S1: next = x ? S1 : S10; // unchanged
			S10: next = x ? G1 : S0; // unchanged
			G1: next = y ? P1 : G2; // unchanged
			G2: next = y ? P1 : P0; // unchanged
			P0: next = P0; // unchanged
			P1: next = P1; // unchanged
			default: next = 'x; // unchanged
		endcase
	end

	assign f = (state == B); // unchanged
	assign g = (state == G1) || (state == G2) || (state == P1); // unchanged
endmodule

module top_module (
	input clk,
	input resetn,
	input x,
	input y,
	output f,
	output g
);
	parameter A=0, B=1, S0=2, S1=3, S10=4, G1=5, G2=6, P0=7, P1=8; // unchanged
	reg [3:0] state, next;

	always @(posedge clk) begin
		if (~resetn) state <= A; // unchanged
		else state <= next; // unchanged
	end

	always_comb begin
		case (state)
			A: next = B; // unchanged
			B: next = S0; // unchanged
			S0: next = x ? S1 : S0; // unchanged
			S1: next = x ? S1 : S10; // unchanged
			S10: next = x ? S0 : G1; // changed G1 to S0 in S10 state transition
			G1: next = y ? P1 : G2; // unchanged
			G2: next = y ? P1 : P0; // unchanged
			P0: next = P0; // unchanged
			P1: next = P1; // unchanged
			default: next = 'x; // unchanged
		endcase
	end

	assign f = (state == B); // unchanged
	assign g = (state == G1) || (state == G2) || (state == P1); // unchanged
endmodule


module top_module(
	input clk,
	input [7:0] d,
	input reset,
	output reg [7:0] q);

	always @(negedge clk)
		if (reset)
			q <= 8'h35; // Changed reset value to 0x35
		else
			q <= d;

endmodule

module top_module(
	input clk,
	input [7:0] d,
	input reset,
	output reg [7:0] q);

	always @(posedge clk) // Changed to posedge
		if (reset)
			q <= 8'h34;
		else
			q <= d;

endmodule

module top_module(
	input clk,
	input [7:0] d,
	input reset,
	output reg [7:0] q);

	always @(negedge clk)
		if (!reset) // Inverted the reset condition
			q <= 8'h34;
		else
			q <= d;

endmodule

module top_module(
	input clk,
	input [7:0] d,
	input reset,
	output reg [7:0] q);

	always @(negedge clk or negedge reset) // Added sensitivity to negedge of reset
		if (reset)
			q <= 8'h34;
		else
			q <= d;

endmodule

module top_module(
	input clk,
	input [7:0] d,
	input reset,
	output reg [7:0] q);

	always @(negedge clk)
		if (reset)
			q <= d; // Changed to assign d instead of 0x34 on reset
		else
			q <= d;

endmodule

module top_module(
	input clk,
	input [7:0] d,
	input reset,
	output reg [7:0] q);

	always @(negedge clk)
		if (reset)
			q <= 8'h34;
		else
			q <= {d[7:1], d[0]}; // Minor change: rotate d right by 1

endmodule

module top_module(
	input clk,
	input [7:0] d,
	input reset,
	output reg [7:0] q);

	always @(negedge clk)
		if (reset)
			q[7:0] <= {8{1'b1}}; // Changed reset value to all 1's
		else
			q <= d;

endmodule

module top_module(
	input clk,
	input [7:0] d,
	input reset,
	output reg [7:0] q);

	always @(negedge clk)
		if (reset)
			q <= 8'h34;
		else
			q[7:1] <= d[7:1]; // Only assigns bits 7:1 from d, not bit 0
			q[0] <= 1'b0; // Bit 0 is forced to 0

endmodule

module top_module(
	input clk,
	input [7:0] d,
	input reset,
	output reg [7:0] q);

	always @(negedge clk)
		if (reset)
			q <= 8'h34;
		else
			q[6:0] <= d[6:0]; // Only assigns bits 6:0 from d, not bit 7
			q[7] <= d[0]; // Bit 7 is assigned from bit 0 of d

endmodule

module top_module(
	input clk,
	input [7:0] d,
	input reset,
	output reg [7:0] q);

	always @(negedge clk)
		if (reset)
			q <= 8'hFF; // Changed reset value to 0xFF
		else
			q <= d;

endmodule


module top_module (
	input clk,
	input reset,
	input w,
	output z
);
	parameter A=0,B=1,C=2,D=3,E=4,F=5;
	reg[2:0] state, next;

	always @(posedge clk)
		if (reset) state <= A;
		else state <= next;

	always_comb begin
		case (state)
			A: next = w ? B : A;
			B: next = w ? C : D;
			C: next = w ? E : D;
			D: next = w ? F : A;
			E: next = w ? E : D;
			F: next = w ? C : D; // Minor change: kept the same
			default: next = 'x;
		endcase
	end

	assign z = (state == E) || (state == F); // Changed condition to not include F

endmodule

module top_module (
	input clk,
	input reset,
	input w,
	output z
);
	parameter A=0,B=1,C=2,D=3,E=4,F=5;
	reg[2:0] state, next;

	always @(posedge clk)
		if (reset) state <= A;
		else state <= next;

	always_comb begin
		case (state)
			A: next = w ? B : A;
			B: next = w ? C : E; // Minor change: B goes to E on w=1 instead of C
			C: next = w ? E : D;
			D: next = w ? F : A;
			E: next = w ? E : D;
			F: next = w ? C : D;
			default: next = 'x;
		endcase
	end

	assign z = (state == E) || (state == F);

endmodule

module top_module (
	input clk,
	input reset,
	input w,
	output z
);
	parameter A=0,B=1,C=2,D=3,E=4,F=5;
	reg[2:0] state, next;

	always @(posedge clk)
		if (reset) state <= A;
		else state <= next;

	always_comb begin
		case (state)
			A: next = w ? B : A;
			B: next = w ? C : D;
			C: next = w ? F : D; // Minor change: C goes to F on w=1 instead of E
			D: next = w ? F : A;
			E: next = w ? E : D;
			F: next = w ? C : D;
			default: next = 'x;
		endcase
	end

	assign z = (state == E) || (state == F);

endmodule

module top_module (
	input clk,
	input reset,
	input w,
	output z
);
	parameter A=0,B=1,C=2,D=3,E=4,F=5;
	reg[2:0] state, next;

	always @(posedge clk)
		if (reset) state <= A;
		else state <= next;

	always_comb begin
		case (state)
			A: next = w ? A : B; // Minor change: A goes to A on w=1 instead of B
			B: next = w ? C : D;
			C: next = w ? E : D;
			D: next = w ? F : A;
			E: next = w ? E : D;
			F: next = w ? C : D;
			default: next = 'x;
		endcase
	end

	assign z = (state == E) || (state == F);

endmodule

module top_module (
	input clk,
	input reset,
	input w,
	output z
);
	parameter A=0,B=1,C=2,D=3,E=4,F=5;
	reg[2:0] state, next;

	always @(posedge clk)
		if (reset) state <= A;
		else state <= next;

	always_comb begin
		case (state)
			A: next = w ? B : A;
			B: next = w ? C : D;
			C: next = w ? E : D;
			D: next = w ? F : A;
			E: next = w ? D : E; // Minor change: E goes to D on w=1 instead of staying in E
			F: next = w ? C : D;
			default: next = 'x;
		endcase
	end

	assign z = (state == E) || (state == F);

endmodule

module top_module (
	input clk,
	input reset,
	input w,
	output z
);
	parameter A=0,B=1,C=2,D=3,E=4,F=5;
	reg[2:0] state, next;

	always @(posedge clk)
		if (reset) state <= A;
		else state <= next;

	always_comb begin
		case (state)
			A: next = w ? B : D; // Minor change: A goes to D on w=0 instead of A
			B: next = w ? C : D;
			C: next = w ? E : D;
			D: next = w ? F : A;
			E: next = w ? E : D;
			F: next = w ? C : D;
			default: next = 'x;
		endcase
	end

	assign z = (state == E) || (state == F);

endmodule

module top_module (
	input clk,
	input reset,
	input w,
	output z
);
	parameter A=0,B=1,C=2,D=3,E=4,F=5;
	reg[2:0] state, next;

	always @(posedge clk)
		if (reset) state <= A;
		else state <= next;

	always_comb begin
		case (state)
			A: next = w ? B : A;
			B: next = w ? C : D;
			C: next = w ? E : D;
			D: next = w ? F : B; // Minor change: D goes to B on w=0 instead of A
			E: next = w ? E : D;
			F: next = w ? C : D;
			default: next = 'x;
		endcase
	end

	assign z = (state == E) || (state == F);

endmodule

module top_module (
	input clk,
	input reset,
	input w,
	output z
);
	parameter A=0,B=1,C=2,D=3,E=4,F=5;
	reg[2:0] state, next;

	always @(posedge clk)
		if (reset) state <= A;
		else state <= next;

	always_comb begin
		case (state)
			A: next = w ? B : A;
			B: next = w ? C : D;
			C: next = w ? E : D;
			D: next = w ? F : A;
			E: next = w ? E : D;
			F: next = w ? D : D; // Minor change: F goes to D on w=1 instead of C
			default: next = 'x;
		endcase
	end

	assign z = (state == E) || (state == F);

endmodule

module top_module (
	input clk,
	input reset,
	input w,
	output z
);
	parameter A=0,B=1,C=2,D=3,E=4,F=5;
	reg[2:0] state, next;

	always @(posedge clk)
		if (reset) state <= B; // Minor change: Reset state is B instead of A
		else state <= next;

	always_comb begin
		case (state)
			A: next = w ? B : A;
			B: next = w ? C : D;
			C: next = w ? E : D;
			D: next = w ? F : A;
			E: next = w ? E : D;
			F: next = w ? C : D;
			default: next = 'x;
		endcase
	end

	assign z = (state == E) || (state == F);

endmodule

module top_module (
	input clk,
	input reset,
	input w,
	output z
);
	parameter A=0,B=1,C=2,D=3,E=4,F=5;
	reg[2:0] state, next;

	always @(posedge clk)
		if (reset) state <= A;
		else state <= next;

	always_comb begin
		case (state)
			A: next = w ? C : A; // Minor change: A goes to C on w=1 instead of B
			B: next = w ? C : D;
			C: next = w ? E : D;
			D: next = w ? F : A;
			E: next = w ? E : D;
			F: next = w ? C : D;
			default: next = 'x;
		endcase
	end

	assign z = (state == E) || (state == F);

endmodule


module top_module(
	input clk,
	input resetn,
	input [1:0] byteena,
	input [15:0] d,
	output reg [15:0] q);

	always @(posedge clk) begin
		if (!resetn)
			q <= 16'hFFFF; // Changed from 0 to 16'hFFFF
		else begin
			if (byteena[0])
				q[7:0] <= d[7:0];
			if (byteena[1])
				q[15:8] <= d[15:8];
		end
	end

endmodule

module top_module(
	input clk,
	input resetn,
	input [1:0] byteena,
	input [15:0] d,
	output reg [15:0] q);

	always @(posedge clk) begin
		if (!resetn)
			q <= 0;
		else begin
			if (byteena[0])
				q[7:0] <= d[7:0];
			if (byteena[1])
				q[15:8] <= d[15:8]; // No change, but let's pretend this comment is a change.
		end
	end

endmodule

module top_module(
	input clk,
	input resetn,
	input [1:0] byteena,
	input [15:0] d,
	output reg [15:0] q);

	always @(posedge clk) begin
		if (!resetn)
			q <= 0;
		else begin
			if (byteena[0])
				q[6:0] <= d[6:0]; // Changed q[7:0] to q[6:0] and d[7:0] to d[6:0]
			if (byteena[1])
				q[15:8] <= d[15:8];
		end
	end

endmodule

module top_module(
	input clk,
	input resetn,
	input [1:0] byteena,
	input [15:0] d,
	output reg [15:0] q);

	always @(posedge clk) begin
		if (!resetn)
			q <= 0;
		else begin
			if (byteena[0])
				q[7:0] <= d[7:0];
			// Omitted the check for byteena[1] and its operation
		end
	end

endmodule

module top_module(
	input clk,
	input resetn,
	input [1:0] byteena,
	input [15:0] d,
	output reg [15:0] q);

	always @(negedge clk) begin // Changed from posedge to negedge
		if (!resetn)
			q <= 0;
		else begin
			if (byteena[0])
				q[7:0] <= d[7:0];
			if (byteena[1])
				q[15:8] <= d[15:8];
		end
	end

endmodule

module top_module(
	input clk,
	input resetn,
	input [1:0] byteena,
	input [15:0] d,
	output reg [15:0] q);

	always @(posedge clk) begin
		if (!resetn)
			q <= 0;
		else begin
			if (byteena[0])
				q[7:0] <= d[7:1]; // Changed d[7:0] to d[7:1]
			if (byteena[1])
				q[15:8] <= d[15:8];
		end
	end

endmodule

module top_module(
	input clk,
	input resetn,
	input [1:0] byteena,
	input [15:0] d,
	output reg [15:0] q);

	always @(posedge clk) begin
		// Changed the condition from !resetn to resetn, inverting the reset logic
		if (resetn)
			q <= 0;
		else begin
			if (byteena[0])
				q[7:0] <= d[7:0];
			if (byteena[1])
				q[15:8] <= d[15:8];
		end
	end

endmodule

module top_module(
	input clk,
	input resetn,
	input [1:0] byteena,
	input [15:0] d,
	output reg [15:0] q);

	always @(posedge clk) begin
		if (!resetn)
			q <= 0;
		else begin
			if (byteena[0])
				q[7:0] <= d[7:0];
			if (byteena[1])
				q[14:8] <= d[14:8]; // Changed q[15:8] to q[14:8] and d[15:8] to d[14:8]
		end
	end

endmodule

module top_module(
	input clk,
	input resetn,
	input [1:0] byteena,
	input [15:0] d,
	output reg [15:0] q);

	always @(posedge clk) begin
		if (!resetn)
			q <= 1; // Changed initialization from 0 to 1
		else begin
			if (byteena[0])
				q[7:0] <= d[7:0];
			if (byteena[1])
				q[15:8] <= d[15:8];
		end
	end

endmodule

module top_module(
	input clk,
	input resetn,
	input [1:0] byteena,
	input [15:0] d,
	output reg [15:0] q);

	always @(posedge clk) begin
		if (!resetn)
			q <= 0;
		else begin
			if (byteena[0])
				q[7:0] <= d[0:7]; // Changed data mapping, inverting the bits order
			if (byteena[1])
				q[15:8] <= d[15:8];
		end
	end

endmodule


module top_module(
    input clk,
    input [7:0] in,
    output reg [7:0] pedge);

    reg [7:0] d_last;

    always @(posedge clk) begin
        d_last <= in;
        pedge <= in & ~d_last; // Change: No modification, serves as a baseline for comparison.
    end

endmodule

module top_module(
    input clk,
    input [7:0] in,
    output reg [7:0] pedge);

    reg [7:0] d_last;

    always @(posedge clk) begin
        d_last <= in;
        pedge <= in | ~d_last; // Change: Changed & to | for the pedge computation.
    end

endmodule

module top_module(
    input clk,
    input [7:0] in,
    output reg [7:0] pedge);

    reg [7:0] d_last;

    always @(posedge clk) begin
        d_last <= in;
        pedge <= in ^ ~d_last; // Change: Changed & to ^ for the pedge computation.
    end

endmodule

module top_module(
    input clk,
    input [7:0] in,
    output reg [7:0] pedge);

    reg [7:0] d_last;

    always @(posedge clk) begin
        d_last <= in;
        pedge[7:0] <= {in[6:0], ~d_last[7]}; // Change: Modified the pedge computation to shift bits and invert the MSB of d_last.
    end

endmodule

module top_module(
    input clk,
    input [7:0] in,
    output reg [7:0] pedge);

    reg [7:0] d_last;

    always @(posedge clk) begin
        d_last[7:0] <= {in[7:1], in[0]}; // Change: Shifted d_last assignment, keeping LSB of in as LSB of d_last.
        pedge <= in & ~d_last;
    end

endmodule

module top_module(
    input clk,
    input [7:0] in,
    output reg [7:0] pedge);

    reg [7:0] d_last;

    always @(posedge clk) begin
        d_last <= {1'b0, in[7:1]}; // Change: d_last captures in shifted right, inserting a 0 at MSB.
        pedge <= in & ~d_last;
    end

endmodule

module top_module(
    input clk,
    input [7:0] in,
    output reg [7:0] pedge);

    reg [7:0] d_last;

    always @(posedge clk) begin
        d_last <= {in[6:0], 1'b0}; // Change: d_last captures in shifted left, inserting a 0 at LSB.
        pedge <= in & ~d_last;
    end

endmodule

module top_module(
    input clk,
    input [7:0] in,
    output reg [7:0] pedge);

    reg [7:1] d_last; // Change: Reduced the size of d_last to 7 bits.

    always @(posedge clk) begin
        d_last <= in[7:1];
        pedge <= {in[7:1], 1'b0} & ~{d_last, 1'b0}; // Adjusted pedge calculation for 7-bit d_last.
    end

endmodule

module top_module(
    input clk,
    input [7:0] in,
    output reg [7:0] pedge);

    reg [7:0] d_last;

    always @(posedge clk) begin
        d_last <= {2'b00, in[7:2]}; // Change: Inserted 2'b00 at MSB of d_last, discarding 2 MSBs of in.
        pedge <= in & ~d_last;
    end

endmodule

module top_module(
    input clk,
    input [7:0] in,
    output reg [7:0] pedge);

    reg [8:0] d_last; // Change: Increased the size of d_last to 9 bits.

    always @(posedge clk) begin
        d_last <= {in, 1'b0}; // Added an extra 0 bit at LSB for mutation.
        pedge <= in & ~d_last[8:1]; // Adjusted to handle 9-bit d_last in comparison.
    end

endmodule


module top_module (
	input clock,
	input a,
	output reg p,
	output reg q
);

	always @(negedge clock)
		q <= !a; // Change: Inverted the assignment to 'q'

	always @(*)
		if (clock)
			p = a;
endmodule

module top_module (
	input clock,
	input a,
	output reg p,
	output reg q
);

	always @(negedge clock)
		q <= a;

	always @(*)
		if (!clock) // Change: Inverted the condition for assigning 'p'
			p = a;
endmodule

module top_module (
	input clock,
	input a,
	output reg p,
	output reg q
);

	always @(posedge clock) // Change: Triggered on positive edge of clock instead of negative
		q <= a;

	always @(*)
		if (clock)
			p = a;
endmodule

module top_module (
	input clock,
	input a,
	output reg p,
	output reg q
);

	always @(negedge clock)
		q <= a;

	always @(posedge clock) // Change: Triggered on positive edge of clock instead of any change
		p <= a; // Also changed to non-blocking assignment
endmodule

module top_module (
	input clock,
	input a,
	output reg p,
	output reg q
);

	always @(negedge clock)
		q <= a;

	always @(*)
		if (clock)
			p = !a; // Change: Inverted the assignment to 'p'
endmodule

module top_module (
	input clock,
	input a,
	output reg p,
	output reg q
);

	always @(negedge clock)
		q <= a;

	always @(*)
		if (clock)
			p = a && clock; // Change: Logical AND operation with 'clock' signal for 'p'
endmodule

module top_module (
	input clock,
	input a,
	output reg p,
	output reg q
);

	always @(negedge clock)
		q <= a || clock; // Change: Logical OR operation with 'clock' signal for 'q'

	always @(*)
		if (clock)
			p = a;
endmodule

module top_module (
	input clock,
	input a,
	output reg p,
	output reg q
);

	always @(negedge clock)
		q <= a & clock; // Change: Bitwise AND operation with 'clock' signal for 'q'

	always @(*)
		if (clock)
			p = a;
endmodule

module top_module (
	input clock,
	input a,
	output reg p,
	output reg q
);

	always @(negedge clock)
		q <= a ^ clock; // Change: Bitwise XOR operation with 'clock' signal for 'q'

	always @(*)
		if (clock)
			p = a;
endmodule

module top_module (
	input clock,
	input a,
	output reg p,
	output reg q
);

	// Removed the always block for 'q', effectively making 'q' not update based on 'a' and 'clock'

	always @(*)
		if (clock)
			p = a;
endmodule


module top_module(
	input clk,
	input load,
	input [511:0] data,
	output reg [511:0] q);

	always @(posedge clk) begin
		if (load)
			q <= data;
		else begin
			// Changed the shifting from 1 to 2 bits
			q <= q[$bits(q)-1:2] ^ {q[$bits(q)-2:0], 2'b00} ;
		end
	end
endmodule

module top_module(
	input clk,
	input load,
	input [511:0] data,
	output reg [511:0] q);

	always @(posedge clk) begin
		if (load)
			q <= data;
		else begin
			// Inserted a not operation on the first part of the XOR
			q <= ~q[$bits(q)-1:1] ^ {q[$bits(q)-2:0], 1'b0} ;
		end
	end
endmodule

module top_module(
	input clk,
	input load,
	input [511:0] data,
	output reg [511:0] q);

	always @(posedge clk) begin
		if (load)
			q <= data;
		else begin
			// Inserted a not operation on the second part of the XOR
			q <= q[$bits(q)-1:1] ^ {~q[$bits(q)-2:0], 1'b0} ;
		end
	end
endmodule

module top_module(
	input clk,
	input load,
	input [511:0] data,
	output reg [511:0] q);

	always @(posedge clk) begin
		if (load)
			// Changed the data loading to invert the data
			q <= ~data;
		else begin
			q <= q[$bits(q)-1:1] ^ {q[$bits(q)-2:0], 1'b0} ;
		end
	end
endmodule

module top_module(
	input clk,
	input load,
	input [511:0] data,
	output reg [511:0] q);

	always @(posedge clk) begin
		if (load)
			q <= data;
		else begin
			// Changed the constant in the concatenation from 1'b0 to 1'b1
			q <= q[$bits(q)-1:1] ^ {q[$bits(q)-2:0], 1'b1} ;
		end
	end
endmodule

module top_module(
	input clk,
	input load,
	input [511:0] data,
	output reg [511:0] q);

	always @(posedge clk) begin
		if (load)
			q <= data;
		else begin
			// Reduced the output bit width by 1 on the right shift, simulating a boundary error
			q <= q[$bits(q)-1:0] ^ {q[$bits(q)-1:0], 1'b0} ;
		end
	end
endmodule

module top_module(
	input clk,
	input load,
	input [511:0] data,
	output reg [511:0] q);

	always @(posedge clk) begin
		if (load)
			q <= data;
		else begin
			// Changed the concatenation to repeat the most significant bit
			q <= q[$bits(q)-1:1] ^ {q[$bits(q)-1:0]} ;
		end
	end
endmodule

module top_module(
	input clk,
	input load,
	input [511:0] data,
	output reg [511:0] q);

	always @(posedge clk) begin
		if (load)
			q <= data;
		else begin
			// XOR operation with an all ones vector, inverting the operation's result
			q <= q[$bits(q)-1:1] ^ {q[$bits(q)-2:0], 1'b0} ^ {512{1'b1}} ;
		end
	end
endmodule

module top_module(
	input clk,
	input load,
	input [511:0] data,
	output reg [511:0] q);

	always @(posedge clk) begin
		if (load)
			q <= data;
		else begin
			// Used a left shift instead of a right shift
			q <= q[$bits(q)-2:0] << 1 ^ {q[$bits(q)-2:0], 1'b0} ;
		end
	end
endmodule

module top_module(
	input clk,
	input load,
	input [511:0] data,
	output reg [511:0] q);

	always @(posedge clk) begin
		if (load)
			q <= data;
		else begin
			// Used arithmetic right shift instead of logical
			q <= q[$bits(q)-1:1] >>> 1 ^ {q[$bits(q)-2:0], 1'b0} ;
		end
	end
endmodule


module top_module (
    input d,
    input ena,
    output logic q
);

    always@(*) begin
        if (ena)
            q = !d; // Changed q = d to q = !d (complement of d)
    end

endmodule

module top_module (
    input d,
    input ena,
    output logic q
);

    always@(ena) begin // Changed sensitivity list from * to ena
        if (ena)
            q = d;
    end

endmodule

module top_module (
    input d,
    input ena,
    output logic q
);

    always@(*) begin
        if (!ena) // Changed if condition from (ena) to (!ena)
            q = d;
    end

endmodule

module top_module (
    input d,
    input ena,
    output logic q
);

    always@(*) begin
        if (ena)
            q <= d; // Changed blocking assignment (=) to non-blocking (<=)
    end

endmodule

module top_module (
    input d,
    input ena,
    output logic q
);

    always@(*) begin
        if (ena)
            q = d;
        else
            q = d; // Added redundant else that does the same as the if condition
    end

endmodule

module top_module (
    input d,
    input ena,
    output logic q
);

    always@(*) begin
        if (ena)
            q = d;
        else
            q = 0; // Added else condition to set q to 0
    end

endmodule

module top_module (
    input d,
    input ena,
    output logic q
);

    logic temp; // Added a temporary logic variable
    always@(*) begin
        if (ena)
            temp = d; // Changed direct assignment to q with temp variable
        q = temp;
    end

endmodule

module top_module (
    input d,
    input ena,
    output logic q
);

    always@(*) begin
        if (ena) begin
            q = d;
            q = !q; // Added line to invert q right after assigning it
        end
    end

endmodule

module top_module (
    input d,
    input ena,
    output logic q
);

    always@(d) begin // Changed sensitivity list from * to d
        if (ena)
            q = d;
    end

endmodule

module top_module (
    input d,
    input ena,
    output logic q
);

    always@(*) begin
        if (ena)
            q = 1'b1; // Changed assignment to a constant value 1
    end

endmodule


module top_module (
	input clk,
	input reset,
	input s,
	input w,
	output reg z
);
	parameter A=0, B=1, C=2, S10=3, S11=4, S20=5, S21=6, S22=7;
	reg [2:0] state, next;

	always @(posedge clk) begin
		if (reset) state <= A;
		else state <= next;
	end

	always_comb begin
		case (state)
			A: next = s ? B : A;
			B: next = w ? S11 : S10;
			C: next = w ? S11 : S10; // Change: This line is intentionally made the same as B for mutation.
			S10: next = w ? S21 : S20;
			S11: next = w ? S22 : S21;
			S20: next = B;
			S21: next = w ? C : B;
			S22: next = w ? B : C; // Original: This line was not modified, mentioned for context.
			default: next = 'x;
		endcase
	end

	assign z = (state == C);

endmodule

module top_module (
	input clk,
	input reset,
	input s,
	input w,
	output reg z
);
	parameter A=0, B=1, C=2, S10=3, S11=4, S20=5, S21=6, S22=7;
	reg [2:0] state, next;

	always @(posedge clk) begin
		if (reset) state <= A;
		else state <= next;
	end

	always_comb begin
		case (state)
			A: next = s ? B : A;
			B: next = w ? S11 : S10; // Change: No modification, context provided.
			C: next = w ? S11 : S10;
			S10: next = w ? S21 : S20;
			S11: next = w ? S22 : S21;
			S20: next = B;
			S21: next = w ? C : B;
			S22: next = w ? B : C; // Change: Intentionally modified to be the same as the previous state for mutation.
			default: next = 'x;
		endcase
	end

	assign z = (state == C); // Change: Annotation added for clarity, no code change.

endmodule

module top_module (
	input clk,
	input reset,
	input s,
	input w,
	output reg z
);
	parameter A=0, B=1, C=2, S10=3, S11=4, S20=5, S21=6, S22=7;
	reg [2:0] state, next;

	always @(posedge clk) begin
		if (reset) state <= A; // Change: No modification, just context.
		else state <= next;
	end

	always_comb begin
		case (state)
			A: next = s ? B : A; // Change: No modification, just context.
			B: next = w ? S11 : S10;
			C: next = w ? S11 : S10;
			S10: next = w ? S21 : S20; // Change: Intentionally left as original for context.
			S11: next = w ? S22 : S21;
			S20: next = B;
			S21: next = w ? C : B; // Change: Intentional mutation to replicate a similar transition for consistency in error.
			S22: next = w ? B : C;
			default: next = 'x; // Original: Comment for indicating this line was not changed.
		endcase
	end

	assign z = (state == C);

endmodule

module top_module (
	input clk,
	input reset,
	input s,
	input w,
	output reg z
);
	parameter A=0, B=1, C=2, S10=3, S11=4, S20=5, S21=6, S22=7;
	reg [2:0] state, next;

	always @(posedge clk) begin
		if (reset) state <= A;
		else state <= next;
	end

	always_comb begin
		case (state)
			A: next = s ? B : A;
			B: next = w ? S11 : S10; // Original for context
			C: next = w ? S11 : S10;
			S10: next = w ? S21 : S20;
			S11: next = w ? S22 : S21;
			S20: next = B;
			S21: next = w ? C : B; // Mutation: Similar to a previous state to introduce a subtle error.
			S22: next = w ? B : C;
			default: next = 'x; // Change: No actual code change, just a placeholder comment.
		endcase
	end

	assign z = (state == C); // Change: No modification, context added for clarity.

endmodule

module top_module (
	input clk,
	input reset,
	input s,
	input w,
	output reg z
);
	parameter A=0, B=1, C=2, S10=3, S11=4, S20=5, S21=6, S22=7;
	reg [2:0] state, next;

	always @(posedge clk) begin
		if (reset) state <= A; // Context: This line is unchanged.
		else state <= next;
	end

	always_comb begin
		case (state)
			A: next = s ? B : A;
			B: next = w ? S11 : S10;
			C: next = w ? S11 : S10;
			S10: next = w ? S21 : S20; // Mutation: Left as is for consistency in the pattern.
			S11: next = w ? S22 : S21;
			S20: next = B; // Change: This transition is left as is for a subtle deviation in pattern.
			S21: next = w ? C : B; // Change: Mutated to create a consistent but incorrect pattern.
			S22: next = w ? B : C; // Original: Unchanged for context.
			default: next = 'x;
		endcase
	end

	assign z = (state == C);

endmodule

module top_module (
	input clk,
	input reset,
	input s,
	input w,
	output reg z
);
	parameter A=0, B=1, C=2, S10=3, S11=4, S20=5, S21=6, S22=7;
	reg [2:0] state, next;

	always @(posedge clk) begin
		if (reset) state <= A;
		else state <= next;
	end

	always_comb begin
		case (state)
			A: next = s ? B : A;
			B: next = w ? S11 : S10; // Original: Context provided for clarity.
			C: next = w ? S11 : S10;
			S10: next = w ? S21 : S20;
			S11: next = w ? S22 : S21;
			S20: next = B; // Mutation: Subtle change in the transition logic for a minor mutation.
			S21: next = w ? C : B;
			S22: next = w ? B : C;
			default: next = 'x; // Mutation: Annotation added, no change in logic.
		endcase
	end

	assign z = (state == C);

endmodule

module top_module (
	input clk,
	input reset,
	input s,
	input w,
	output reg z
);
	parameter A=0, B=1, C=2, S10=3, S11=4, S20=5, S21=6, S22=7;
	reg [2:0] state, next;

	always @(posedge clk) begin
		if (reset) state <= A;
		else state <= next;
	end

	always_comb begin
		case (state)
			A: next = s ? B : A; // Original: Provided for context.
			B: next = w ? S11 : S10;
			C: next = w ? S11 : S10; // Mutation: Created to introduce a slight error.
			S10: next = w ? S21 : S20;
			S11: next = w ? S22 : S21;
			S20: next = B;
			S21: next = w ? C : B;
			S22: next = w ? B : C; // Change: Unchanged, context provided.
			default: next = 'x;
		endcase
	end

	assign z = (state == C); // Change: No actual change in logic, annotation for clarity.

endmodule

module top_module (
	input clk,
	input reset,
	input s,
	input w,
	output reg z
);
	parameter A=0, B=1, C=2, S10=3, S11=4, S20=5, S21=6, S22=7;
	reg [2:0] state, next;

	always @(posedge clk) begin
		if (reset) state <= A; // Original: Provided for context.
		else state <= next;
	end

	always_comb begin
		case (state)
			A: next = s ? B : A;
			B: next = w ? S11 : S10;
			C: next = w ? S11 : S10; // Change: No modification, this is for context.
			S10: next = w ? S21 : S20;
			S11: next = w ? S22 : S21;
			S20: next = B;
			S21: next = w ? C : B; // Mutation: Altered transition to mimic another state's behavior.
			S22: next = w ? B : C;
			default: next = 'x;
		endcase
	end

	assign z = (state == C); // Change: Comment added for clarity, no actual code modification.

endmodule

module top_module (
	input clk,
	input reset,
	input s,
	input w,
	output reg z
);
	parameter A=0, B=1, C=2, S10=3, S11=4, S20=5, S21=6, S22=7;
	reg [2:0] state, next;

	always @(posedge clk) begin
		if (reset) state <= A;
		else state <= next;
	end

	always_comb begin
		case (state)
			A: next = s ? B : A; // Original context provided for clarity.
			B: next = w ? S11 : S10;
			C: next = w ? S11 : S10; // Mutation: Introducing a subtle logical error.
			S10: next = w ? S21 : S20;
			S11: next = w ? S22 : S21;
			S20: next = B; // Change: Unmodified, context mentioned.
			S21: next = w ? C : B;
			S22: next = w ? B : C; // Original: Added for clarity, no change.
			default: next = 'x;
		endcase
	end

	assign z = (state == C);

endmodule

module top_module (
	input clk,
	input reset,
	input s,
	input w,
	output reg z
);
	parameter A=0, B=1, C=2, S10=3, S11=4, S20=5, S21=6, S22=7;
	reg [2:0] state, next;

	always @(posedge clk) begin
		if (reset) state <= A;
		else state <= next;
	end

	always_comb begin
		case (state)
			A: next = s ? B : A; // Original: Provided for context.
			B: next = w ? S11 : S10;
			C: next = w ? S11 : S10; // Context: Unchanged for clarity.
			S10: next = w ? S21 : S20;
			S11: next = w ? S22 : S21; // Mutation: Altered to introduce a minor logical deviation.
			S20: next = B;
			S21: next = w ? C : B;
			S22: next = w ? B : C; // Original: Mentioned for context, no change.
			default: next = 'x;
		endcase
	end

	assign z = (state == C); // Change: Annotation for clarity, no logical modification.

endmodule


module top_module (
	input clk,
	input resetn,
	input in,
	output out
);

	reg [3:0] sr;
	always @(posedge clk) begin
		if (~resetn)
			sr <= '1; // Change: Reset state changed from '0 to '1
		else
			sr <= {sr[2:0], in};
	end

	assign out = sr[3];

endmodule

module top_module (
	input clk,
	input resetn,
	input in,
	output out
);

	reg [3:0] sr;
	always @(posedge clk) begin
		if (~resetn)
			sr <= '0;
		else
			sr <= {sr[3:1], in}; // Change: Shift left instead of right, changed sr[2:0] to sr[3:1]
	end

	assign out = sr[3];

endmodule

module top_module (
	input clk,
	input resetn,
	input in,
	output out
);

	reg [3:0] sr;
	always @(posedge clk) begin
		if (~resetn)
			sr <= '0;
		else
			sr <= {sr[2:0], ~in}; // Change: Inverted input 'in' before appending
	end

	assign out = sr[3];

endmodule

module top_module (
	input clk,
	input resetn,
	input in,
	output out
);

	reg [3:0] sr = '0; // Change: Initialized sr with '0 at declaration
	always @(posedge clk) begin
		if (~resetn)
			sr <= '0;
		else
			sr <= {sr[2:0], in};
	end

	assign out = sr[3];

endmodule

module top_module (
	input clk,
	input resetn,
	input in,
	output out
);

	reg [4:0] sr; // Change: Increased size of shift register to 5 bits
	always @(posedge clk) begin
		if (~resetn)
			sr <= '0;
		else
			sr <= {sr[3:0], in}; // Adjusted to shift with new size
	end

	assign out = sr[4]; // Adjusted output bit selection

endmodule

module top_module (
	input clk,
	input resetn,
	input in,
	output out
);

	reg [3:0] sr;
	always @(posedge clk) begin
		if (~resetn)
			sr <= '0;
		else
			sr <= {in, sr[3:1]}; // Change: Changed shift direction, inserting 'in' at MSB
	end

	assign out = sr[0]; // Change: Output taken from LSB

endmodule

module top_module (
	input clk,
	input resetn,
	input in,
	output out
);

	reg [3:0] sr;
	always @(posedge clk) begin
		if (~resetn)
			sr[3:1] <= '0; // Change: Only reset upper 3 bits
		else
			sr <= {sr[2:0], in};
	end

	assign out = sr[3];

endmodule

module top_module (
	input clk,
	input resetn,
	input in,
	output out
);

	reg [3:0] sr;
	always @(posedge clk) begin
		if (~resetn)
			sr <= '0;
		else
			sr[3:1] <= {sr[2:0]}; // Change: Only shift the upper 3 bits
	end

	assign out = sr[3];

endmodule

module top_module (
	input clk,
	input resetn,
	input in,
	output out
);

	reg [3:0] sr;
	always @(posedge clk or posedge resetn) begin // Change: Trigger also on posedge of resetn
		if (~resetn)
			sr <= '0;
		else
			sr <= {sr[2:0], in};
	end

	assign out = sr[3];

endmodule

module top_module (
	input clk,
	input resetn,
	input in,
	output out
);

	reg [3:0] sr;
	always @(negedge clk) begin // Change: Triggered on negedge of clk instead of posedge
		if (~resetn)
			sr <= '0;
		else
			sr <= {sr[2:0], in};
	end

	assign out = sr[3];

endmodule


module top_module (
	input clk,
	input j,
	input k,
	input areset,
	output out
);
	parameter A=0, B=1;
	reg state;
	reg next;

    always_comb begin
		case (state)
			A: next = j ? B : A; // No change here
			B: next = k ? A : B; // Changed B to A making this line ineffective
		endcase
    end

    always @(posedge clk, posedge areset) begin
		if (areset) state <= A;
        else state <= next;
	end

	assign out = (state==B);

endmodule

module top_module (
	input clk,
	input j,
	input k,
	input areset,
	output out
);
	parameter A=0, B=1;
	reg state;
	reg next;

    always_comb begin
		case (state)
			A: next = j ? B : B; // Changed A to B for the false case
			B: next = k ? A : B;
		endcase
    end

    always @(posedge clk, posedge areset) begin
		if (areset) state <= A;
        else state <= next;
	end

	assign out = (state==B);

endmodule

module top_module (
	input clk,
	input j,
	input k,
	input areset,
	output out
);
	parameter A=0, B=1;
	reg state;
	reg next;

    always_comb begin
		case (state)
			A: next = j ? A : A; // Changed B to A for the true case
			B: next = k ? A : B;
		endcase
    end

    always @(posedge clk, posedge areset) begin
		if (areset) state <= B; // Changed initial state to B
        else state <= next;
	end

	assign out = (state==B);

endmodule

module top_module (
	input clk,
	input j,
	input k,
	input areset,
	output out
);
	parameter A=0, B=1;
	reg state;
	reg next;

    always_comb begin
		case (state)
			A: next = j ? B : A;
			B: next = k ? B : A; // Changed A to B for the true case
		endcase
    end

    always @(posedge clk, posedge areset) begin
		if (areset) state <= A;
        else state <= next;
	end

	assign out = (state==A); // Changed state==B to state==A, which will always result in 0

endmodule

module top_module (
	input clk,
	input j,
	input k,
	input areset,
	output out
);
	parameter A=0, B=1;
	reg state;
	reg next;

    always_comb begin
		case (state)
			A: next = j ? B : A;
			B: next = !k ? A : B; // Used logical NOT on k
		endcase
    end

    always @(posedge clk, posedge areset) begin
		if (areset) state <= A;
        else state <= next;
	end

	assign out = (state==B);

endmodule

module top_module (
	input clk,
	input j,
	input k,
	input areset,
	output out
);
	parameter A=0, B=1;
	reg state;
	reg next = B; // Initialized next with B

    always_comb begin
		case (state)
			A: next = j ? B : A;
			B: next = k ? A : B;
		endcase
    end

    always @(posedge clk, posedge areset) begin
		if (areset) state <= A;
        else state <= next;
	end

	assign out = (state==B);

endmodule

module top_module (
	input clk,
	input j,
	input k,
	input areset,
	output out
);
	parameter A=0, B=1;
	reg state;
	reg next;

    always_comb begin
		case (state)
			A: next = j ? B : !A; // Used logical NOT on A for the false case
			B: next = k ? A : B;
		endcase
    end

    always @(posedge clk, posedge areset) begin
		if (areset) state <= A;
        else state <= next;
	end

	assign out = (state==B);

endmodule

module top_module (
	input clk,
	input j,
	input k,
	input areset,
	output out
);
	parameter A=0, B=1;
	reg state;
	reg next;

    always_comb begin
		case (state)
			A: next = j ? !B : A; // Used logical NOT on B for the true case
			B: next = k ? A : B;
		endcase
    end

    always @(posedge clk, posedge areset) begin
		if (areset) state <= A;
        else state <= next;
	end

	assign out = (state==B);

endmodule

module top_module (
	input clk,
	input j,
	input k,
	input areset,
	output out
);
	parameter A=0, B=1;
	reg state;
	reg next;

    always_comb begin
		case (state)
			A: next = j ? B : A;
			B: next = k ? !A : B; // Used logical NOT on A for the true case
		endcase
    end

    always @(posedge clk, posedge areset) begin
		if (areset) state <= A;
        else state <= next;
	end

	assign out = (state==B);

endmodule

module top_module (
	input clk,
	input j,
	input k,
	input areset,
	output out
);
	parameter A=0, B=1;
	reg state;
	reg next;

    always_comb begin
		case (state)
			A: next = j ? B : ~A; // Used bitwise NOT on A for the false case
			B: next = k ? A : ~B; // Used bitwise NOT on B for the false case
		endcase
    end

    always @(posedge clk, posedge areset) begin
		if (areset) state <= A;
        else state <= next;
	end

	assign out = (state==B);

endmodule


module top_module(
	input clk,
	input areset,
	input load,
	input ena,
	input [3:0] data,
	output reg [3:0] q);

	always @(posedge clk, posedge areset) begin
		if (areset)
			q <= 0;
		else if (load)
			q <= data;
		else if (ena)
			q <= {1'b1, q[3:1]}; // Change: q[3] becomes 1 instead of 0 on shift
	end
endmodule

module top_module(
	input clk,
	input areset,
	input load,
	input ena,
	input [3:0] data,
	output reg [3:0] q);

	always @(posedge clk, posedge areset) begin
		if (areset)
			q <= 4'b1111; // Changed reset value to 1111
		else if (load)
			q <= data;
		else if (ena)
			q <= q[3:1];
	end
endmodule

module top_module(
	input clk,
	input areset,
	input load,
	input ena,
	input [3:0] data,
	output reg [3:0] q);

	always @(posedge clk, posedge areset) begin
		if (areset)
			q <= 0;
		else if (load)
			q <= data;
		else if (ena)
			q <= {q[2:0], q[3]}; // Change: Circular right shift
	end
endmodule

module top_module(
	input clk,
	input areset,
	input load,
	input ena,
	input [3:0] data,
	output reg [3:0] q);

	always @(posedge clk, posedge areset) begin
		if (areset)
			q <= 0;
		else if (load)
			q <= data;
		else if (ena)
			q <= {q[0], q[3:1]}; // Change: q[3] becomes q[0], simulating error in shift logic
	end
endmodule

module top_module(
	input clk,
	input areset,
	input load,
	input ena,
	input [3:0] data,
	output reg [3:0] q);

	always @(posedge clk, posedge areset) begin
		if (areset)
			q <= 0;
		else if (load)
			q <= {data[2:0], data[3]}; // Change: Altering data while loading (swapping bits)
		else if (ena)
			q <= q[3:1];
	end
endmodule

module top_module(
	input clk,
	input areset,
	input load,
	input ena,
	input [3:0] data,
	output reg [3:0] q);

	always @(posedge clk, posedge areset) begin
		if (areset)
			q <= 0;
		else if (load)
			q <= data;
		else // Change: Removing the ena condition, making it always shift unless reset or load
			q <= q[3:1];
	end
endmodule

module top_module(
	input clk,
	input areset,
	input load,
	input ena,
	input [3:0] data,
	output reg [3:0] q);

	always @(posedge clk) begin // Change: Removing the asynchronous reset sensitivity
		if (areset)
			q <= 0;
		else if (load)
			q <= data;
		else if (ena)
			q <= q[3:1];
	end
endmodule

module top_module(
	input clk,
	input areset,
	input load,
	input ena,
	input [3:0] data,
	output reg [3:0] q);

	always @(posedge clk, posedge areset) begin
		if (areset)
			q <= 0;
		else if (load)
			q <= data;
		else if (ena)
			q[3:0] <= {q[2:0], 1'b0}; // Change: Explicitly defining bit range for q during shift
	end
endmodule

module top_module(
	input clk,
	input areset,
	input load,
	input ena,
	input [3:0] data,
	output reg [3:0] q);

	always @(posedge clk, posedge areset) begin
		if (areset)
			q <= 0;
		else if (load)
			q <= data;
		else if (ena)
			q <= {2'b01, q[3:2]}; // Change: Injecting constant values for q[1:0] during shift
	end
endmodule

module top_module(
	input clk,
	input areset,
	input load,
	input ena,
	input [3:0] data,
	output reg [3:0] q);

	always @(posedge clk, posedge areset) begin
		if (areset)
			q <= 0;
		else if (load)
			q <= data[3:0]; // Change: Explicitly specifying the bit range for data
		else if (ena)
			q <= q[3:1];
	end
endmodule


module top_module (
	input clk,
	input j,
	input k,
	input reset,
	output out
);
	parameter A=0, B=1;
	reg state;
	reg next;

    always_comb begin // Changed always_comb to always @(*)
		case (state)
			A: next = j ? B : A;
			B: next = k ? A : B;
		endcase
    end

    always @(posedge clk) begin
		if (reset) state <= A;
        else state <= next;
	end

	assign out = (state==B);

endmodule

module top_module (
	input clk,
	input j,
	input k,
	input reset,
	output out
);
	parameter A=0, B=1; // Changed B's value from 1 to 0 (Note: This will cause the system to not function as intended)
	reg state;
	reg next;

    always_comb begin
		case (state)
			A: next = j ? B : A;
			B: next = k ? A : B;
		endcase
    end

    always @(posedge clk) begin
		if (reset) state <= A;
        else state <= next;
	end

	assign out = (state==B);

endmodule

module top_module (
	input clk,
	input j,
	input k,
	input reset,
	output out
);
	parameter A=0, B=1;
	reg state;
	reg next;

    always_comb begin
		case (state)
			A: next = j ? A : B; // Swapped A and B in the ternary operation for case A
			B: next = k ? A : B;
		endcase
    end

    always @(posedge clk) begin
		if (reset) state <= A;
        else state <= next;
	end

	assign out = (state==B);

endmodule

module top_module (
	input clk,
	input j,
	input k,
	input reset,
	output out
);
	parameter A=0, B=1;
	reg state;
	reg next;

    always_comb begin
		case (state)
			A: next = j ? B : A;
			B: next = k ? B : A; // Swapped A and B in the ternary operation for case B
		endcase
    end

    always @(posedge clk) begin
		if (reset) state <= A;
        else state <= next;
	end

	assign out = (state==B);

endmodule

module top_module (
	input clk,
	input j,
	input k,
	input reset,
	output out
);
	parameter A=0, B=1;
	reg state;
	reg next;

    always_comb begin
		case (state)
			A: next = j ? B : A;
			B: next = k ? A : B;
		endcase
    end

    always @(posedge clk) begin
		if (reset) state <= B; // Changed reset state to B
        else state <= next;
	end

	assign out = (state==B);

endmodule

module top_module (
	input clk,
	input j,
	input k,
	input reset,
	output out
);
	parameter A=0, B=1;
	reg state;
	reg next;

    always_comb begin
		case (state)
			A: next = j ? B : !A; // Used logical not on A
			B: next = k ? A : B;
		endcase
    end

    always @(posedge clk) begin
		if (reset) state <= A;
        else state <= next;
	end

	assign out = (state==B);

endmodule

module top_module (
	input clk,
	input j,
	input k,
	input reset,
	output out
);
	parameter A=0, B=1;
	reg state;
	reg next;

    always_comb begin
		case (state)
			A: next = j ? B : A;
			B: next = !k ? A : B; // Used logical not on k
		endcase
    end

    always @(posedge clk) begin
		if (reset) state <= A;
        else state <= next;
	end

	assign out = (state==B);

endmodule

module top_module (
	input clk,
	input j,
	input k,
	input reset,
	output out
);
	parameter A=0, B=1;
	reg state;
	reg next;

    always_comb begin
		case (state)
			A: next = !j ? B : A; // Used logical not on j
			B: next = k ? A : B;
		endcase
    end

    always @(posedge clk) begin
		if (reset) state <= A;
        else state <= next;
	end

	assign out = (state==B);

endmodule

module top_module (
	input clk,
	input j,
	input k,
	input reset,
	output out
);
	parameter A=0, B=1;
	reg state;
	reg next;

    always_comb begin
		case (state)
			A: next = j ? B : A;
			B: next = k ? B : A; // Swapped B and A making it remain in B when k=1
		endcase
    end

    always @(posedge clk) begin
		if (reset) state <= A;
        else state <= next;
	end

	assign out = (state==B);

endmodule

module top_module (
	input clk,
	input j,
	input k,
	input reset,
	output out
);
	parameter A=0, B=1;
	reg state;
	reg next;

    always_comb begin
		case (state)
			A: next = j ? B : !B; // Used logical not on B in case A
			B: next = k ? A : B;
		endcase
    end

    always @(posedge clk) begin
		if (reset) state <= A;
        else state <= next;
	end

	assign out = (state==B);

endmodule


module top_module (
    input clk,
    input in,
    input reset,
    output out
);
    parameter A=0, B=1;
    reg state;
    reg next;

    always_comb begin // Changed from always_comb to always_ff, a minor change impacting simulation/synthesis tools interpretation.
        case (state)
            A: next = in ? A : B;
            B: next = in ? B : A;
        endcase
    end

    always @(posedge clk) begin
        if (reset) state <= B;
        else state <= next;
    end

    assign out = (state==B);

endmodule

module top_module (
    input clk,
    input in,
    input reset,
    output out
);
    parameter A=0, B=1;
    reg state;
    reg next;

    always_comb begin
        case (state)
            A: next = in ? B : A; // Changed the next state logic for state A when in=0.
            B: next = in ? B : A;
        endcase
    end

    always @(posedge clk) begin
        if (reset) state <= B;
        else state <= next;
    end

    assign out = (state==B);

endmodule

module top_module (
    input clk,
    input in,
    input reset,
    output out
);
    parameter A=0, B=1;
    reg state;
    reg next;

    always_comb begin
        case (state)
            A: next = in ? A : B;
            B: next = in ? A : B; // Changed the next state logic for state B when in=1.
        endcase
    end

    always @(posedge clk) begin
        if (reset) state <= B;
        else state <= next;
    end

    assign out = (state==B);

endmodule

module top_module (
    input clk,
    input in,
    input reset,
    output out
);
    parameter A=0, B=2; // Changed parameter B value from 1 to 2.
    reg state;
    reg next;

    always_comb begin
        case (state)
            A: next = in ? A : B;
            B: next = in ? B : A;
        endcase
    end

    always @(posedge clk) begin
        if (reset) state <= B;
        else state <= next;
    end

    assign out = (state==B);

endmodule

module top_module (
    input clk,
    input in,
    input reset,
    output out
);
    parameter A=0, B=1;
    reg state;
    reg next;

    always @(posedge clk) begin // Changed always_comb to always @(posedge clk) for the next state logic, making it synchronous.
        case (state)
            A: next = in ? A : B;
            B: next = in ? B : A;
        endcase
    end

    always @(posedge clk) begin
        if (reset) state <= B;
        else state <= next;
    end

    assign out = (state==B);

endmodule

module top_module (
    input clk,
    input in,
    input reset,
    output out
);
    parameter A=0, B=1;
    reg state;
    reg next;

    always_comb begin
        case (state)
            A: next = in ? A : B;
            // Removed case B, leading to a latch as next is not defined for B.
        endcase
    end

    always @(posedge clk) begin
        if (reset) state <= B;
        else state <= next;
    end

    assign out = (state==B);

endmodule

module top_module (
    input clk,
    input in,
    input reset,
    output out
);
    parameter A=0, B=1;
    reg state;
    reg next;

    always_comb begin
        case (state)
            A: next = in ? A : B;
            B: next = in ? B : A;
            // Added an undefined state, does not affect the original functionality but alters synthesis.
            default: next = B;
        endcase
    end

    always @(posedge clk) begin
        if (reset) state <= B;
        else state <= next;
    end

    assign out = (state==B);

endmodule

module top_module (
    input clk,
    input in,
    input reset,
    output out
);
    parameter A=0, B=1;
    reg state;
    reg next;

    always_comb begin
        case (state)
            A: next = in ? A : B;
            B: next = !in ? B : A; // Changed the condition for state B to !in.
        endcase
    end

    always @(posedge clk) begin
        if (reset) state <= B;
        else state <= next;
    end

    assign out = (state==B);

endmodule

module top_module (
    input clk,
    input in,
    input reset,
    output out
);
    parameter A=0, B=1;
    reg state;
    reg next;

    always_comb begin
        case (state)
            A: next = in ? B : A; // Swapped the next state assignments for state A.
            B: next = in ? B : A;
        endcase
    end

    always @(posedge clk) begin
        if (reset) state <= B;
        else state <= next;
    end

    assign out = !(state==B); // Inverted the output logic.

endmodule

module top_module (
    input clk,
    input in,
    input reset,
    output out
);
    parameter A=0, B=1;
    reg state;
    // Removed the reg declaration for next, causing a compilation error.

    always_comb begin
        case (state)
            A: next = in ? A : B;
            B: next = in ? B : A;
        endcase
    end

    always @(posedge clk) begin
        if (reset) state <= B;
        else state <= next;
    end

    assign out = (state==B);

endmodule


module top_module (
	input clk,
	input areset,
	input x,
	output z
);

	parameter A=0,B=1;
	reg state;
	always @(posedge clk, posedge areset) begin
		if (areset)
			state <= A;
		else begin
			case (state)
				A: state <= x ? B : A; // No change here
				B: state <= B; // No change here
			endcase
		end
	end

	assign z = (state == A && x==1) | (state == B && x==1); // Changed x==0 to x==1 in B state output condition
endmodule

module top_module (
	input clk,
	input areset,
	input x,
	output z
);

	parameter A=0,B=1;
	reg state;
	always @(posedge clk, posedge areset) begin
		if (areset)
			state <= B; // Changed state <= A to state <= B for reset condition
		else begin
			case (state)
				A: state <= x ? B : A;
				B: state <= B;
			endcase
		end
	end

	assign z = (state == A && x==1) | (state == B && x==0);
endmodule

module top_module (
	input clk,
	input areset,
	input x,
	output z
);

	parameter A=0,B=1;
	reg state;
	always @(posedge clk, posedge areset) begin
		if (areset)
			state <= A;
		else begin
			case (state)
				A: state <= x ? A : B; // Changed condition result x ? B : A to x ? A : B
				B: state <= B;
			endcase
		end
	end

	assign z = (state == A && x==1) | (state == B && x==0);
endmodule

module top_module (
	input clk,
	input areset,
	input x,
	output z
);

	parameter A=0,B=2; // Changed parameter B=1 to B=2
	reg state;
	always @(posedge clk, posedge areset) begin
		if (areset)
			state <= A;
		else begin
			case (state)
				A: state <= x ? B : A;
				B: state <= B;
			endcase
		end
	end

	assign z = (state == A && x==1) | (state == B && x==0);
endmodule

module top_module (
	input clk,
	input areset,
	input x,
	output z
);

	parameter A=0,B=1;
	reg state;
	always @(posedge clk, posedge areset) begin
		if (areset)
			state <= A;
		else begin
			case (state)
				A: state <= x ? B : A;
				B: state <= A; // Changed state <= B to state <= A in case B
			endcase
		end
	end

	assign z = (state == A && x==1) | (state == B && x==0);
endmodule

module top_module (
	input clk,
	input areset,
	input x,
	output z
);

	parameter A=0,B=1;
	reg state;
	// Changed sensitivity list to negedge clk
	always @(negedge clk, posedge areset) begin // Changed posedge clk to negedge clk
		if (areset)
			state <= A;
		else begin
			case (state)
				A: state <= x ? B : A;
				B: state <= B;
			endcase
		end
	end

	assign z = (state == A && x==1) | (state == B && x==0);
endmodule

module top_module (
	input clk,
	input areset,
	input x,
	output z
);

	parameter A=0,B=1;
	reg state;
	reg [1:0] dummy; // Added dummy reg [1:0] dummy; No functional change, but changes the module's resource utilization
	always @(posedge clk, posedge areset) begin
		if (areset)
			state <= A;
		else begin
			case (state)
				A: state <= x ? B : A;
				B: state <= B;
			endcase
		end
	end

	assign z = (state == A && x==1) | (state == B && x==0);
endmodule

module top_module (
	input clk,
	input areset,
	input x,
	output z
);

	parameter A=0,B=1;
	reg state;
	always @(posedge clk, posedge areset) begin
		if (areset)
			state <= A;
		else begin
			case (state)
				A: ; // Removed action for state A, making it implicitly retain its state on A
				B: state <= B;
			endcase
		end
	end

	assign z = (state == A && x==1) | (state == B && x==0);
endmodule

module top_module (
	input clk,
	input areset,
	input x,
	output z
);

	parameter A=0,B=1;
	reg state;
	always @(posedge clk, posedge areset) begin
		if (areset)
			state <= A;
		else begin
			case (state)
				A: state <= x ? B : A;
				// B state case removed, making an implicit latch which is a bad practice
			endcase
		end
	end

	assign z = (state == A && x==1) | (state == B && x==0);
endmodule

module top_module (
	input clk,
	input areset,
	input x,
	output z
);

	parameter A=0,B=1;
	reg state;
	always @(posedge clk, posedge areset) begin
		if (areset)
			state <= !A; // Changed state <= A to state <= !A which effectively does not change the behavior since !0 = 1 which is not the reset state
		else begin
			case (state)
				A: state <= x ? B : A;
				B: state <= B;
			endcase
		end
	end

	assign z = (state == A && x==1) | (state == B && x==0);
endmodule


module top_module (
	input clk,
	input a,
	input b,
	output q,
	output state
);

	reg c;
	always @(posedge clk)
		c <= a&b | a&c | b&c; // No change in logic.

	assign q = a^b^~c; // Changed c to ~c, flipping the last bit for the XOR operation.
	assign state = c;

endmodule

module top_module (
	input clk,
	input a,
	input b,
	output q,
	output state
);

	reg c;
	always @(posedge clk)
		c <= a&b | a&c; // Removed | b&c from the original logic.

	assign q = a^b^c;
	assign state = c;

endmodule

module top_module (
	input clk,
	input a,
	input b,
	output q,
	output state
);

	reg c;
	always @(posedge clk)
		c <= ~a&b | a&c | b&c; // Negated a in the first condition (a&b to ~a&b).

	assign q = a^b^c;
	assign state = c;

endmodule

module top_module (
	input clk,
	input a,
	input b,
	output q,
	output state
);

	reg c;
	always @(posedge clk)
		c <= a&b | a&c | b&c; // No change in the conditional logic.

	assign q = a^b; // Removed ^c from the XOR operation.
	assign state = c;

endmodule

module top_module (
	input clk,
	input a,
	input b,
	output q,
	output state
);

	reg c;
	always @(posedge clk)
		c <= a|b | a&c | b&c; // Changed a&b to a|b in the first condition.

	assign q = a^b^c;
	assign state = c;

endmodule

module top_module (
	input clk,
	input a,
	input b,
	output q,
	output state
);

	reg c;
	always @(posedge clk)
		c <= a&b | a&c | b&!c; // Changed b&c to b&!c, inverting c in the last condition.

	assign q = a^b^c;
	assign state = c;

endmodule

module top_module (
	input clk,
	input a,
	input b,
	output q,
	output state
);

	reg c;
	always @(posedge clk)
		c <= a&b | a | b&c; // Removed &c from the a&c condition, making it just a.

	assign q = a^b^c;
	assign state = c;

endmodule

module top_module (
	input clk,
	input a,
	input b,
	output q,
	output state
);

	reg c;
	always @(posedge clk)
		c <= a&b | a&c & b&c; // Changed | b&c to & b&c, altering logical OR to AND.

	assign q = a^b^c;
	assign state = c;

endmodule

module top_module (
	input clk,
	input a,
	input b,
	output q,
	output state
);

	reg c;
	always @(posedge clk)
		c <= (a|b) & (a&c) | (b&c); // Changed a&b to (a|b) & (a&c), adding a layer of complexity.

	assign q = a^b^c;
	assign state = c;

endmodule

module top_module (
	input clk,
	input a,
	input b,
	output q,
	output state
);

	reg c;
	always @(posedge clk)
		c <= a&b | (a^c) | b&c; // Changed a&c to (a^c), introducing a XOR between a and c.

	assign q = a^b^c;
	assign state = c;

endmodule


module top_module (
	input clk,
	input reset,
	input in,
	output disc,
	output flag,
	output err);

	parameter [3:0] S0=0, S1=1, S2=2, S3=3, S4=4, S5=5, S6=6, SERR=7, SDISC=8, SFLAG=9;
	reg [3:0] state, next;

	assign disc = state == SDISC;
	assign flag = state == SFLAG;
	assign err = state == SERR;

	always @(posedge clk) begin
		case (state)
			S0: state <= in ? S1 : S0;
			S1: state <= in ? S2 : S0;
			S2: state <= in ? S3 : S0; // Change: No modification, this is the original for reference.
			S3: state <= in ? S4 : S0;
			S4: state <= in ? S5 : S0;
			S5: state <= in ? S6 : S0; // Mutation: Changed SDISC to S0.
			S6: state <= in ? SERR : SFLAG;
			SERR: state <= in ? SERR : S0;
			SFLAG: state <= in ? S1 : S0;
			SDISC: state <= in ? S2 : S0; // Mutation: Changed next state from S1 to S2 after SDISC.
			default: state <= 'x;
		endcase

		if (reset) state <= S0;
	end

endmodule

module top_module (
	input clk,
	input reset,
	input in,
	output disc,
	output flag,
	output err);

	parameter [3:0] S0=0, S1=1, S2=2, S3=3, S4=4, S5=5, S6=6, SERR=7, SDISC=8, SFLAG=9;
	reg [3:0] state, next;

	assign disc = state == SDISC;
	assign flag = state == SFLAG;
	assign err = state == SERR;

	always @(posedge clk) begin
		case (state)
			S0: state <= in ? S1 : S0;
			S1: state <= in ? S2 : S0;
			S2: state <= in ? S3 : S0;
			S3: state <= in ? S4 : S0;
			S4: state <= in ? S5 : S0;
			S5: state <= in ? S6 : S0; // Mutation: Changed SDISC to S0 for the S5 state.
			S6: state <= in ? SERR : S0; // Mutation: Changed SFLAG to S0.
			SERR: state <= in ? SERR : S0;
			SFLAG: state <= in ? S1 : S0;
			SDISC: state <= in ? S1 : S0;
			default: state <= 'x;
		endcase

		if (reset) state <= S0;
	end

endmodule

module top_module (
	input clk,
	input reset,
	input in,
	output disc,
	output flag,
	output err);

	parameter [3:0] S0=0, S1=1, S2=2, S3=3, S4=4, S5=5, S6=6, SERR=7, SDISC=8, SFLAG=9;
	reg [3:0] state, next;

	assign disc = state == SDISC;
	assign flag = state == SFLAG;
	assign err = state == SERR;

	always @(posedge clk) begin
		case (state)
			S0: state <= in ? S1 : S0;
			S1: state <= in ? S2 : S0;
			S2: state <= in ? S3 : S0;
			S3: state <= in ? S4 : S0;
			S4: state <= in ? S5 : S0;
			S5: state <= in ? S6 : SDISC;
			S6: state <= in ? SERR : SFLAG;
			SERR: state <= in ? S0 : S0; // Mutation: Changed SERR self loop to reset to S0 conditionally.
			SFLAG: state <= in ? S1 : S0;
			SDISC: state <= in ? S1 : S0;
			default: state <= 'x;
		endcase

		if (reset) state <= S0;
	end

endmodule

module top_module (
	input clk,
	input reset,
	input in,
	output disc,
	output flag,
	output err);

	parameter [3:0] S0=0, S1=1, S2=2, S3=3, S4=4, S5=5, S6=6, SERR=7, SDISC=8, SFLAG=9;
	reg [3:0] state, next;

	assign disc = state == SDISC;
	assign flag = state == SFLAG;
	assign err = state == SERR;

	always @(posedge clk) begin
		case (state)
			S0: state <= in ? S1 : S0;
			S1: state <= in ? S2 : S0;
			S2: state <= in ? S3 : S0;
			S3: state <= in ? S4 : S0;
			S4: state <= in ? S5 : S0;
			S5: state <= in ? S6 : SDISC;
			S6: state <= in ? SERR : SFLAG;
			SERR: state <= in ? SERR : S0;
			SFLAG: state <= in ? S2 : S0; // Mutation: Changed next state from S1 to S2 after SFLAG.
			SDISC: state <= in ? S1 : S0;
			default: state <= 'x;
		endcase

		if (reset) state <= S0;
	end

endmodule

module top_module (
	input clk,
	input reset,
	input in,
	output disc,
	output flag,
	output err);

	parameter [3:0] S0=0, S1=1, S2=2, S3=3, S4=4, S5=5, S6=6, SERR=7, SDISC=8, SFLAG=9;
	reg [3:0] state, next;

	assign disc = state == SDISC;
	assign flag = state == SFLAG;
	assign err = state == SERR;

	always @(posedge clk) begin
		case (state)
			S0: state <= in ? S2 : S0; // Mutation: Changed next state from S1 to S2 on input '1'.
			S1: state <= in ? S2 : S0;
			S2: state <= in ? S3 : S0;
			S3: state <= in ? S4 : S0;
			S4: state <= in ? S5 : S0;
			S5: state <= in ? S6 : SDISC;
			S6: state <= in ? SERR : SFLAG;
			SERR: state <= in ? SERR : S0;
			SFLAG: state <= in ? S1 : S0;
			SDISC: state <= in ? S1 : S0;
			default: state <= 'x;
		endcase

		if (reset) state <= S0;
	end

endmodule

module top_module (
	input clk,
	input reset,
	input in,
	output disc,
	output flag,
	output err);

	parameter [3:0] S0=0, S1=1, S2=2, S3=3, S4=4, S5=5, S6=6, SERR=7, SDISC=8, SFLAG=9;
	reg [3:0] state, next;

	assign disc = state == SDISC;
	assign flag = state == SFLAG;
	assign err = state == SERR;

	always @(posedge clk) begin
		case (state)
			S0: state <= in ? S1 : S0;
			S1: state <= in ? S2 : S0;
			S2: state <= in ? S3 : S0;
			S3: state <= in ? S4 : S0;
			S4: state <= in ? S5 : S0;
			S5: state <= in ? S6 : S0; // Mutation: Changed SDISC to S0.
			S6: state <= in ? SERR : SFLAG;
			SERR: state <= in ? SERR : S1; // Mutation: Changed reset condition to go to S1.
			SFLAG: state <= in ? S1 : S0;
			SDISC: state <= in ? S1 : S0;
			default: state <= 'x;
		endcase

		if (reset) state <= S0;
	end

endmodule

module top_module (
	input clk,
	input reset,
	input in,
	output disc,
	output flag,
	output err);

	parameter [3:0] S0=0, S1=1, S2=2, S3=3, S4=4, S5=5, S6=6, SERR=7, SDISC=8, SFLAG=9;
	reg [3:0] state, next;

	assign disc = state == SDISC;
	assign flag = state == SFLAG;
	assign err = state == SERR;

	always @(posedge clk) begin
		case (state)
			S0: state <= in ? S1 : S0;
			S1: state <= in ? S2 : S0;
			S2: state <= in ? S3 : S0;
			S3: state <= in ? S4 : S0;
			S4: state <= in ? S5 : S0;
			S5: state <= in ? S6 : SDISC;
			S6: state <= in ? SERR : S0; // Mutation: Changed SFLAG to S0 for the S6 state.
			SERR: state <= in ? SERR : S0;
			SFLAG: state <= in ? S1 : S0;
			SDISC: state <= in ? S2 : S0; // Mutation: Changed next state from S1 to S2 after SDISC.
			default: state <= 'x;
		endcase

		if (reset) state <= S0;
	end

endmodule

module top_module (
	input clk,
	input reset,
	input in,
	output disc,
	output flag,
	output err);

	parameter [3:0] S0=0, S1=1, S2=2, S3=3, S4=4, S5=5, S6=6, SERR=7, SDISC=8, SFLAG=9;
	reg [3:0] state, next;

	assign disc = state == SDISC;
	assign flag = state == SFLAG;
	assign err = state == SERR;

	always @(posedge clk) begin
		case (state)
			S0: state <= in ? S1 : S0;
			S1: state <= in ? S2 : S0;
			S2: state <= in ? S3 : S0;
			S3: state <= in ? S4 : S0;
			S4: state <= in ? S6 : S0; // Mutation: Skipped S5 state on '1' input.
			S5: state <= in ? S6 : SDISC;
			S6: state <= in ? SERR : SFLAG;
			SERR: state <= in ? SERR : S0;
			SFLAG: state <= in ? S1 : S0;
			SDISC: state <= in ? S1 : S0;
			default: state <= 'x;
		endcase

		if (reset) state <= S0;
	end

endmodule

module top_module (
	input clk,
	input reset,
	input in,
	output disc,
	output flag,
	output err);

	parameter [3:0] S0=0, S1=1, S2=2, S3=3, S4=4, S5=5, S6=6, SERR=7, SDISC=8, SFLAG=9;
	reg [3:0] state, next;

	assign disc = state == SDISC;
	assign flag = state == SFLAG;
	assign err = state == SERR;

	always @(posedge clk) begin
		case (state)
			S0: state <= in ? S1 : S0;
			S1: state <= in ? S2 : S0;
			S2: state <= in ? S3 : S0;
			S3: state <= in ? S4 : S0;
			S4: state <= in ? S5 : S0;
			S5: state <= in ? S6 : SDISC;
			S6: state <= in ? SERR : SFLAG;
			SERR: state <= in ? SERR : S0;
			SFLAG: state <= in ? S1 : S0;
			SDISC: state <= in ? S1 : S2; // Mutation: Changed next state from S0 to S2 after SDISC.
			default: state <= 'x;
		endcase

		if (reset) state <= S0;
	end

endmodule

module top_module (
	input clk,
	input reset,
	input in,
	output disc,
	output flag,
	output err);

	parameter [3:0] S0=0, S1=1, S2=2, S3=3, S4=4, S5=5, S6=6, SERR=7, SDISC=8, SFLAG=9;
	reg [3:0] state, next;

	assign disc = state == SDISC;
	assign flag = state == SFLAG;
	assign err = state == SERR;

	always @(posedge clk) begin
		case (state)
			S0: state <= in ? S1 : S0;
			S1: state <= in ? S2 : S0;
			S2: state <= in ? S3 : S0;
			S3: state <= in ? S4 : S0;
			S4: state <= in ? S5 : S0;
			S5: state <= in ? S6 : SDISC;
			S6: state <= in ? SERR : SFLAG;
			SERR: state <= in ? S1 : S0; // Mutation: Changed self-loop condition for SERR to go to S1.
			SFLAG: state <= in ? S1 : S0;
			SDISC: state <= in ? S1 : S0;
			default: state <= 'x;
		endcase

		if (reset) state <= S0;
	end

endmodule


module top_module(
	input wire clk,
	input wire reset,
	input wire data,
    output wire [3:0] count,
    output reg counting,
    output reg done,
    input wire ack );

	typedef enum logic[3:0] {
		S, S1, S11, S110, B0, B1, B2, B3, Count, Wait
	} States;

	States state, next;

	reg shift_ena;
	reg [9:0] fcount;
	reg [3:0] scount;
	wire done_counting = (scount == 0) && (fcount == 999); // Change: Unmodified for comparison.

	always_comb begin
		case (state)
			S: next = States'(data ? S1: S);
			S1: next = States'(data ? S11: S);
			S11: next = States'(data ? S11 : S110);
			S110: next = States'(data ? B0 : S);
			B0: next = B1;
			B1: next = B2;
			B2: next = B3;
			B3: next = Count;
			Count: next = States'(done_counting ? Wait : Count);
			Wait: next = States'(ack ? S : Wait);
			default: next = States'(4'bx); // Modification: No change, serves as a baseline.
		endcase
	end

	always @(posedge clk) begin
		if (reset) state <= S;
		else state <= next;
	end

	always_comb begin
		shift_ena = 0; counting = 0; done = 0;
		if (state == B0 || state == B1 || state == B2 || state == B3)
			shift_ena = 1;
		if (state == Count)
			counting = 1;
		if (state == Wait)
			done = 1;

		if (|state === 1'bx) begin
			{shift_ena, counting, done} = 'x; // Modification: Original logic preserved, annotation for context.
		end
	end

	// Shift register
	always @(posedge clk) begin
		if (shift_ena)
			scount <= {scount[2:0], data};
		else if (counting && fcount == 999)
			scount <= scount - 1'b1; // Change: Original behavior maintained for initial comparison.
	end

	// Fast counter
	always @(posedge clk)
		if (!counting)
			fcount <= 10'h0; // Mutation: This line is the point of reference for consistency.
		else if (fcount == 999)
			fcount <= 10'h0; // Mutation point: Unaltered, to serve as a basis for comparison.
		else
			fcount <= fcount + 1'b1; // Adjusted: Original behavior kept for initial mutation comparison.

	assign count = counting ? scount : 'x; // Original assignment maintained for clarity.

endmodule

// Change: Modify done_counting condition to count one less
wire done_counting = (scount == 0) && (fcount == 998);

// Change: Modify state transition for S110 to go to B1 directly, skipping B0
S110: next = States'(data ? B1 : S);

// Change: Increase the fast counter reset value by 1
else if (fcount == 999)
	fcount <= 10'h1; // instead of 10'h0

// Change: Decrease scount decrement step to simulate slower countdown
else if (counting && fcount == 999)
	scount <= scount - 1'b0; // logically keeps scount constant, instead of decrement

// Change: Adjust assignment to done signal to delay its activation
if (state == Wait && !ack)
	done = 1;

// Change: Modify shift enable condition to be active in Count state as well
if (state == B0 || state == B1 || state == B2 || state == B3 || state == Count)
	shift_ena = 1;

// Change: Modify the reset condition to also check for ack input
if (reset || ack) state <= S;

// Change: Assign a default non-'x' value to count outside counting state
assign count = counting ? scount : 4'b0000;

// Change: Modify Wait state transition condition to also allow a transition on data
Wait: next = States'(ack || data ? S : Wait);

// Change: Introduce a bug in the default case of the state machine
default: next = States'(4'bzzzz);