Forward Slice => All statements that could be affected if you change a given statement.
AIS = Actualy Impacted Set (Manully calcualte the expected outcome)
EIS = Estimated Impacted Set (The set extracted from the outcome of the program)

Run

chmod +x run.sh
# Show all dependencies for a file
./run.sh examples/Example1.java
# Analyze impact of line 3
./run.sh examples/Example1.java 3

Testing

Test1 simple data flow

Line 3 (int x = 5;)

AIS = {3, 4, 5, 6}

TODO:

Line 4 (int y = x + 2;)

AIS = {4,5,6}

=== Impact Analysis for Line 4 ===

Statement(s) at line 4:
  2: int y = x + 2 ;

=== IMPACTED LINES ===
  Line 4
  Line 5
  Line 6

Total: 3 lines impacted

Test2 Control Dependency

Change at Line 5 (if (x > 5))

AIS = {5, 6, 8, 9}

=== Impact Analysis for Line 5 ===

Statement(s) at line 5:
  3: if ( x > 5 )

=== IMPACTED LINES ===
  Line 5
  Line 8
  Line 9

Total: 3 lines impacted

TP: {5, 8, 9} |TP| = 3 FP: {} |FP| = 0 FN: {6} |FN| = 1 Precision: 3 / (3 + 0) = 3/3 = 1.00 (100%) Recall: 3 / (3 + 1) = 3/4 = 0.75 (75%) Analysis:

Perfect precision (no false alarms)
Missed line 6 (the assignment inside the if-block)
UNDER-APPROXIMATION

Change at Line 3 (int x = 10;)

AIS = {3, 5, 6, 8, 9}

Test3 Simple Loop

Change at Line 3 (int sum = 0;)

AIS = {3, 6, 8}

Change at Line 5 (for loop heading)

AIS = {5, 6, 8}

Test4 If-Else Branch

Change at Line 5 (if (x > 5))

AIS = {5, 6, 8, 10, 11}

Change at Line 6 (y = x + 10;)

AIS = {6, 10, 11}

Test5 Multiple Uses va

Change at Line 3 (int a = 5;)

AIS = {3, 4, 5, 6, 7}

Change at Line 4 (int b = a + 2;)

AIS = {4, 6, 7}

Test6 Nested Control

Change at Line 5 (if (x > 5))

AIS = {5, 6, 7, 10, 11}

Change at Line 6 (if (x > 8))

AIS = {6, 7, 10, 11}

Test7 While Loop

Change at Line 5 (while (count < 5))

AIS = {5, 6, 7, 9}

Change at Line 3 (int count = 0;)

AIS = {3, 5, 6, 7, 9}

Test8 Reassignment

Change at Line 3 (int x = 5;)

AIS = {3, 4, 7}

Change at Line 5 (x = 10;)

AIS = {5, 6, 8}

Test9 No Impact

Change at Line 4 (int y = 10;)

AIS = {4, 6, 8}

Change at Line 3 (int x = 5;)

AIS = {3, 5, 7}

Test10 Complex Expression

Change at Line 3 (int a = 2;)

AIS = {3, 6, 7, 8, 9}

Change at Line 8 (if (x > 5))

AIS = {8, 9}

=== IMPACTED LINES ===
  Line 6
  Line 8