STEP 0:
    modifications:
        U : l1.0.kt -> l1.kt
    added file: l1.kt
STEP 1:
    modifications:
        U : l1.1.kt -> l1.kt
    modified ir: l1.kt
STEP 2:
    modifications:
        U : l2.2.kt -> l2.kt
    added file: l2.kt
STEP 3:
    modifications:
        U : l2.3.kt -> l2.kt
    modified ir: l2.kt
STEP 4:
    modifications:
        D : l1.kt
    removed file: l1.kt
STEP 5:
    modifications:
        U : l1.5.kt -> l1.kt
    added file: l1.kt
STEP 6:
    modifications:
        U : l1.6.kt -> l1.kt
        U : l2.6.kt -> l2.kt
    modified ir: l1.kt, l2.kt
