unknown Initial ITS Start location: [1] Program variables: c i j 0: [1] -> [2] : c'=0, T, cost: 1 1: [2] -> [3] : i'=0, T, cost: 1 2: [3] -> [4] : -100+i < 0, cost: 1 6: [3] -> [7] : -100+i >= 0, cost: 1 3: [4] -> [5] : c'=1+c, T, cost: 1 4: [5] -> [6] : i'=1+i, T, cost: 1 5: [6] -> [3] : T, cost: 1 7: [7] -> [8] : j'=5, T, cost: 1 8: [8] -> [9] : -21+j < 0, cost: 1 12: [8] -> [12] : -21+j >= 0, cost: 1 9: [9] -> [10] : c'=1+c, T, cost: 1 10: [10] -> [11] : j'=3+j, T, cost: 1 11: [11] -> [8] : T, cost: 1 Chained Linear Paths Start location: [1] Program variables: c i j 13: [1] -> [3] : c'=0, i'=0, T, cost: 1 15: [3] -> [8] : j'=5, -100+i >= 0, cost: 1 17: [3] -> [3] : c'=1+c, i'=1+i, -100+i < 0, cost: 1 12: [8] -> [12] : -21+j >= 0, cost: 1 20: [8] -> [8] : c'=1+c, j'=3+j, -21+j < 0, cost: 1 Eliminating location [2] by chaining: Applied chaining First rule: [1] -> [2] : c'=0, T, cost: 1 Second rule: [2] -> [3] : i'=0, T, cost: 1 New rule: [1] -> [3] : c'=0, i'=0, T, cost: 1 Applied deletion Removed the following rules: 0 1 Eliminating location [4] by chaining: Applied chaining First rule: [3] -> [4] : -100+i < 0, cost: 1 Second rule: [4] -> [5] : c'=1+c, T, cost: 1 New rule: [3] -> [5] : c'=1+c, -100+i < 0, cost: 1 Applied deletion Removed the following rules: 2 3 Eliminating location [7] by chaining: Applied chaining First rule: [3] -> [7] : -100+i >= 0, cost: 1 Second rule: [7] -> [8] : j'=5, T, cost: 1 New rule: [3] -> [8] : j'=5, -100+i >= 0, cost: 1 Applied deletion Removed the following rules: 6 7 Eliminating location [5] by chaining: Applied chaining First rule: [3] -> [5] : c'=1+c, -100+i < 0, cost: 1 Second rule: [5] -> [6] : i'=1+i, T, cost: 1 New rule: [3] -> [6] : c'=1+c, i'=1+i, -100+i < 0, cost: 1 Applied deletion Removed the following rules: 4 14 Eliminating location [6] by chaining: Applied chaining First rule: [3] -> [6] : c'=1+c, i'=1+i, -100+i < 0, cost: 1 Second rule: [6] -> [3] : T, cost: 1 New rule: [3] -> [3] : c'=1+c, i'=1+i, -100+i < 0, cost: 1 Applied deletion Removed the following rules: 5 16 Eliminating location [9] by chaining: Applied chaining First rule: [8] -> [9] : -21+j < 0, cost: 1 Second rule: [9] -> [10] : c'=1+c, T, cost: 1 New rule: [8] -> [10] : c'=1+c, -21+j < 0, cost: 1 Applied deletion Removed the following rules: 8 9 Eliminating location [10] by chaining: Applied chaining First rule: [8] -> [10] : c'=1+c, -21+j < 0, cost: 1 Second rule: [10] -> [11] : j'=3+j, T, cost: 1 New rule: [8] -> [11] : c'=1+c, j'=3+j, -21+j < 0, cost: 1 Applied deletion Removed the following rules: 10 18 Eliminating location [11] by chaining: Applied chaining First rule: [8] -> [11] : c'=1+c, j'=3+j, -21+j < 0, cost: 1 Second rule: [11] -> [8] : T, cost: 1 New rule: [8] -> [8] : c'=1+c, j'=3+j, -21+j < 0, cost: 1 Applied deletion Removed the following rules: 11 19 Step with 13 Trace 13[T] Blocked [{}, {}] Step with 17 Trace 13[T], 17[(-100+i < 0)] Blocked [{}, {15[T]}, {}] Accelerate Start location: [1] Program variables: c i j 13: [1] -> [3] : c'=0, i'=0, T, cost: 1 15: [3] -> [8] : j'=5, -100+i >= 0, cost: 1 17: [3] -> [3] : c'=1+c, i'=1+i, -100+i < 0, cost: 1 21: [3] -> [3] : c'=c+n, i'=i+n, (101-i-n > 0 /\ -1+n >= 0), cost: 1 12: [8] -> [12] : -21+j >= 0, cost: 1 20: [8] -> [8] : c'=1+c, j'=3+j, -21+j < 0, cost: 1 Loop Acceleration Original rule: [3] -> [3] : c'=1+c, i'=1+i, (-100+i < 0), cost: 1 New rule: [3] -> [3] : c'=c+n, i'=i+n, (101-i-n > 0 /\ -1+n >= 0), cost: 1 100-i > 0 [0]: montonic decrease yields 101-i-n > 0 100-i > 0 [1]: eventual increase yields (1 <= 0 /\ 100-i > 0) Replacement map: {100-i > 0 -> 101-i-n > 0} Trace 13[T], 21[(101-i-n > 0 /\ -1+n >= 0)] Blocked [{}, {15[T]}, {17[T], 21[T]}] Step with 15 Trace 13[T], 21[(101-i-n > 0 /\ -1+n >= 0)], 15[(-100+i >= 0)] Blocked [{}, {15[T]}, {17[T], 21[T]}, {}] Step with 20 Trace 13[T], 21[(101-i-n > 0 /\ -1+n >= 0)], 15[(-100+i >= 0)], 20[(-21+j < 0)] Blocked [{}, {15[T]}, {17[T], 21[T]}, {12[T]}, {}] Accelerate Start location: [1] Program variables: c i j 13: [1] -> [3] : c'=0, i'=0, T, cost: 1 15: [3] -> [8] : j'=5, -100+i >= 0, cost: 1 17: [3] -> [3] : c'=1+c, i'=1+i, -100+i < 0, cost: 1 21: [3] -> [3] : c'=c+n, i'=i+n, (101-i-n > 0 /\ -1+n >= 0), cost: 1 12: [8] -> [12] : -21+j >= 0, cost: 1 20: [8] -> [8] : c'=1+c, j'=3+j, -21+j < 0, cost: 1 22: [8] -> [8] : c'=c+n2, j'=j+3*n2, (24-j-3*n2 > 0 /\ -1+n2 >= 0), cost: 1 Loop Acceleration Original rule: [8] -> [8] : c'=1+c, j'=3+j, (-21+j < 0), cost: 1 New rule: [8] -> [8] : c'=c+n2, j'=j+3*n2, (24-j-3*n2 > 0 /\ -1+n2 >= 0), cost: 1 21-j > 0 [0]: montonic decrease yields 24-j-3*n2 > 0 21-j > 0 [1]: eventual increase yields (3 <= 0 /\ 21-j > 0) Replacement map: {21-j > 0 -> 24-j-3*n2 > 0} Trace 13[T], 21[(101-i-n > 0 /\ -1+n >= 0)], 15[(-100+i >= 0)], 22[(24-j-3*n2 > 0 /\ -1+n2 >= 0)] Blocked [{}, {15[T]}, {17[T], 21[T]}, {12[T]}, {20[T], 22[T]}] Step with 12 Trace 13[T], 21[(101-i-n > 0 /\ -1+n >= 0)], 15[(-100+i >= 0)], 22[(24-j-3*n2 > 0 /\ -1+n2 >= 0)], 12[(-21+j >= 0)] Blocked [{}, {15[T]}, {17[T], 21[T]}, {12[T]}, {20[T], 22[T]}, {}] Backtrack Trace 13[T], 21[(101-i-n > 0 /\ -1+n >= 0)], 15[(-100+i >= 0)], 22[(24-j-3*n2 > 0 /\ -1+n2 >= 0)] Blocked [{}, {15[T]}, {17[T], 21[T]}, {12[T]}, {12[T], 20[T], 22[T]}] Backtrack Trace 13[T], 21[(101-i-n > 0 /\ -1+n >= 0)], 15[(-100+i >= 0)] Blocked [{}, {15[T]}, {17[T], 21[T]}, {12[T], 22[T]}] Step with 20 Trace 13[T], 21[(101-i-n > 0 /\ -1+n >= 0)], 15[(-100+i >= 0)], 20[(-21+j < 0)] Blocked [{}, {15[T]}, {17[T], 21[T]}, {12[T], 22[T]}, {}] Covered Trace 13[T], 21[(101-i-n > 0 /\ -1+n >= 0)], 15[(-100+i >= 0)] Blocked [{}, {15[T]}, {17[T], 21[T]}, {12[T], 20[T], 22[T]}] Backtrack Trace 13[T], 21[(101-i-n > 0 /\ -1+n >= 0)] Blocked [{}, {15[T]}, {15[T], 17[T], 21[T]}] Backtrack Trace 13[T] Blocked [{}, {15[T], 21[T]}] Step with 17 Trace 13[T], 17[(-100+i < 0)] Blocked [{}, {15[T], 21[T]}, {}] Covered Trace 13[T] Blocked [{}, {15[T], 17[T], 21[T]}] Backtrack Trace Blocked [{13[T]}] Accept unknown Build SHA: a05f16bf13df659c382799650051f91bf6828c7b