NO Initial ITS Start location: __init Program variables: arg1 0: f1_0_main_ConstantStackPush -> f46_0_main_LE : arg1'=arg1p1, -arg1p1 == 0, cost: 1 1: f46_0_main_LE -> f46_0_main_LE : arg1'=arg1p2, (-11+arg1 < 0 /\ 1-arg1p2+arg1 == 0), cost: 1 2: f46_0_main_LE -> f46_0_main_LE : arg1'=arg1p3, (-arg1p3+arg1 == 0 /\ -10+arg1 > 0), cost: 1 3: __init -> f1_0_main_ConstantStackPush : arg1'=arg1p4, T, cost: 1 Chained Linear Paths Start location: __init Program variables: arg1 1: f46_0_main_LE -> f46_0_main_LE : arg1'=arg1p2, (-11+arg1 < 0 /\ 1-arg1p2+arg1 == 0), cost: 1 2: f46_0_main_LE -> f46_0_main_LE : arg1'=arg1p3, (-arg1p3+arg1 == 0 /\ -10+arg1 > 0), cost: 1 4: __init -> f46_0_main_LE : arg1'=arg1p1, -arg1p1 == 0, cost: 1 Eliminating location f1_0_main_ConstantStackPush by chaining: Applied chaining First rule: __init -> f1_0_main_ConstantStackPush : arg1'=arg1p4, T, cost: 1 Second rule: f1_0_main_ConstantStackPush -> f46_0_main_LE : arg1'=arg1p1, -arg1p1 == 0, cost: 1 New rule: __init -> f46_0_main_LE : arg1'=arg1p1, -arg1p1 == 0, cost: 1 Applied deletion Removed the following rules: 0 3 Simplified Transitions Start location: __init Program variables: arg1 5: f46_0_main_LE -> f46_0_main_LE : arg1'=1+arg1, -11+arg1 < 0, cost: 1 6: f46_0_main_LE -> f46_0_main_LE : -10+arg1 > 0, cost: 1 7: __init -> f46_0_main_LE : arg1'=0, T, cost: 1 Propagated Equalities Original rule: f46_0_main_LE -> f46_0_main_LE : arg1'=arg1p2, (-11+arg1 < 0 /\ 1-arg1p2+arg1 == 0), cost: 1 New rule: f46_0_main_LE -> f46_0_main_LE : arg1'=1+arg1, (0 == 0 /\ -11+arg1 < 0), cost: 1 propagated equality arg1p2 = 1+arg1 Simplified Guard Original rule: f46_0_main_LE -> f46_0_main_LE : arg1'=1+arg1, (0 == 0 /\ -11+arg1 < 0), cost: 1 New rule: f46_0_main_LE -> f46_0_main_LE : arg1'=1+arg1, -11+arg1 < 0, cost: 1 Propagated Equalities Original rule: f46_0_main_LE -> f46_0_main_LE : arg1'=arg1p3, (-arg1p3+arg1 == 0 /\ -10+arg1 > 0), cost: 1 New rule: f46_0_main_LE -> f46_0_main_LE : arg1'=arg1, (0 == 0 /\ -10+arg1 > 0), cost: 1 propagated equality arg1p3 = arg1 Simplified Guard Original rule: f46_0_main_LE -> f46_0_main_LE : arg1'=arg1, (0 == 0 /\ -10+arg1 > 0), cost: 1 New rule: f46_0_main_LE -> f46_0_main_LE : arg1'=arg1, -10+arg1 > 0, cost: 1 Removed Trivial Updates Original rule: f46_0_main_LE -> f46_0_main_LE : arg1'=arg1, -10+arg1 > 0, cost: 1 New rule: f46_0_main_LE -> f46_0_main_LE : -10+arg1 > 0, cost: 1 Propagated Equalities Original rule: __init -> f46_0_main_LE : arg1'=arg1p1, -arg1p1 == 0, cost: 1 New rule: __init -> f46_0_main_LE : arg1'=0, 0 == 0, cost: 1 propagated equality arg1p1 = 0 Simplified Guard Original rule: __init -> f46_0_main_LE : arg1'=0, 0 == 0, cost: 1 New rule: __init -> f46_0_main_LE : arg1'=0, T, cost: 1 Step with 7 Trace 7[T] Blocked [{}, {}] Step with 5 Trace 7[T], 5[(-11+arg1 < 0)] Blocked [{}, {}, {}] Accelerate Start location: __init Program variables: arg1 5: f46_0_main_LE -> f46_0_main_LE : arg1'=1+arg1, -11+arg1 < 0, cost: 1 6: f46_0_main_LE -> f46_0_main_LE : -10+arg1 > 0, cost: 1 8: f46_0_main_LE -> f46_0_main_LE : arg1'=n+arg1, (-1+n >= 0 /\ 12-n-arg1 > 0), cost: 1 7: __init -> f46_0_main_LE : arg1'=0, T, cost: 1 Loop Acceleration Original rule: f46_0_main_LE -> f46_0_main_LE : arg1'=1+arg1, (-11+arg1 < 0), cost: 1 New rule: f46_0_main_LE -> f46_0_main_LE : arg1'=n+arg1, (-1+n >= 0 /\ 12-n-arg1 > 0), cost: 1 11-arg1 > 0 [0]: montonic decrease yields 12-n-arg1 > 0 11-arg1 > 0 [1]: eventual increase yields (1 <= 0 /\ 11-arg1 > 0) Replacement map: {11-arg1 > 0 -> 12-n-arg1 > 0} Trace 7[T], 8[(-1+n >= 0 /\ 12-n-arg1 > 0)] Blocked [{}, {}, {5[T], 8[T]}] Step with 6 Trace 7[T], 8[(-1+n >= 0 /\ 12-n-arg1 > 0)], 6[(-10+arg1 > 0)] Blocked [{}, {}, {5[T], 8[T]}, {}] Nonterm Start location: __init Program variables: arg1 5: f46_0_main_LE -> f46_0_main_LE : arg1'=1+arg1, -11+arg1 < 0, cost: 1 6: f46_0_main_LE -> f46_0_main_LE : -10+arg1 > 0, cost: 1 8: f46_0_main_LE -> f46_0_main_LE : arg1'=n+arg1, (-1+n >= 0 /\ 12-n-arg1 > 0), cost: 1 9: f46_0_main_LE -> LoAT_sink : (-1+n2 >= 0 /\ -10+arg1 > 0), cost: NONTERM 7: __init -> f46_0_main_LE : arg1'=0, T, cost: 1 Certificate of Non-Termination Original rule: f46_0_main_LE -> f46_0_main_LE : (-10+arg1 > 0), cost: 1 New rule: f46_0_main_LE -> LoAT_sink : (-1+n2 >= 0 /\ -10+arg1 > 0), cost: NONTERM -10+arg1 > 0 [0]: monotonic increase yields -10+arg1 > 0 Replacement map: {-10+arg1 > 0 -> -10+arg1 > 0} Step with 9 Trace 7[T], 8[(-1+n >= 0 /\ 12-n-arg1 > 0)], 9[(-1+n2 >= 0 /\ -10+arg1 > 0)] Blocked [{}, {}, {5[T], 8[T]}, {9[T]}] Refute Counterexample [ arg1=0 ] 7 [ arg1=11 ] 8 [ arg1=arg1 ] 9 NO Build SHA: a05f16bf13df659c382799650051f91bf6828c7b