NO Initial ITS Start location: l4 0: l0 -> l1 : x^0'=x^post0, (0 == 0 /\ 1-x^0 <= 0), cost: 1 2: l0 -> l2 : x^0'=x^post2, (1+x^post2-x^0 == 0 /\ 1-x^0 <= 0), cost: 1 1: l1 -> l0 : x^0'=x^post1, -x^post1+x^0 == 0, cost: 1 3: l2 -> l0 : x^0'=x^post3, x^0-x^post3 == 0, cost: 1 4: l3 -> l0 : x^0'=x^post4, -x^post4+x^0 == 0, cost: 1 5: l4 -> l3 : x^0'=x^post5, -x^post5+x^0 == 0, cost: 1 Applied preprocessing Original rule: l0 -> l1 : x^0'=x^post0, (0 == 0 /\ 1-x^0 <= 0), cost: 1 New rule: l0 -> l1 : x^0'=x^post0, -1+x^0 >= 0, cost: 1 Applied preprocessing Original rule: l1 -> l0 : x^0'=x^post1, -x^post1+x^0 == 0, cost: 1 New rule: l1 -> l0 : TRUE, cost: 1 Applied preprocessing Original rule: l0 -> l2 : x^0'=x^post2, (1+x^post2-x^0 == 0 /\ 1-x^0 <= 0), cost: 1 New rule: l0 -> l2 : x^0'=-1+x^0, -1+x^0 >= 0, cost: 1 Applied preprocessing Original rule: l2 -> l0 : x^0'=x^post3, x^0-x^post3 == 0, cost: 1 New rule: l2 -> l0 : TRUE, cost: 1 Applied preprocessing Original rule: l3 -> l0 : x^0'=x^post4, -x^post4+x^0 == 0, cost: 1 New rule: l3 -> l0 : TRUE, cost: 1 Applied preprocessing Original rule: l4 -> l3 : x^0'=x^post5, -x^post5+x^0 == 0, cost: 1 New rule: l4 -> l3 : TRUE, cost: 1 Simplified rules Start location: l4 6: l0 -> l1 : x^0'=x^post0, -1+x^0 >= 0, cost: 1 8: l0 -> l2 : x^0'=-1+x^0, -1+x^0 >= 0, cost: 1 7: l1 -> l0 : TRUE, cost: 1 9: l2 -> l0 : TRUE, cost: 1 10: l3 -> l0 : TRUE, cost: 1 11: l4 -> l3 : TRUE, cost: 1 Eliminating location l3 by chaining: Applied chaining First rule: l4 -> l3 : TRUE, cost: 1 Second rule: l3 -> l0 : TRUE, cost: 1 New rule: l4 -> l0 : TRUE, cost: 2 Applied deletion Removed the following rules: 10 11 Eliminating location l1 by chaining: Applied chaining First rule: l0 -> l1 : x^0'=x^post0, -1+x^0 >= 0, cost: 1 Second rule: l1 -> l0 : TRUE, cost: 1 New rule: l0 -> l0 : x^0'=x^post0, -1+x^0 >= 0, cost: 2 Applied deletion Removed the following rules: 6 7 Eliminating location l2 by chaining: Applied chaining First rule: l0 -> l2 : x^0'=-1+x^0, -1+x^0 >= 0, cost: 1 Second rule: l2 -> l0 : TRUE, cost: 1 New rule: l0 -> l0 : x^0'=-1+x^0, -1+x^0 >= 0, cost: 2 Applied deletion Removed the following rules: 8 9 Eliminated locations on linear paths Start location: l4 13: l0 -> l0 : x^0'=x^post0, -1+x^0 >= 0, cost: 2 14: l0 -> l0 : x^0'=-1+x^0, -1+x^0 >= 0, cost: 2 12: l4 -> l0 : TRUE, cost: 2 Applied acceleration Original rule: l0 -> l0 : x^0'=x^post0, -1+x^0 >= 0, cost: 2 New rule: l0 -> l0 : x^0'=x^post0, (-1+x^post0 >= 0 /\ -1+n >= 0 /\ -1+x^0 >= 0), cost: 2*n Sub-proof via acceration calculus written to file:///tmp/tmpnam_OeoClg.txt Applied nonterm Original rule: l0 -> l0 : x^0'=x^post0, -1+x^0 >= 0, cost: 2 New rule: l0 -> [5] : (x^0-x^post0 <= 0 /\ -1+x^0 >= 0), cost: NONTERM Sub-proof via acceration calculus written to file:///tmp/tmpnam_adaKcc.txt Applied acceleration Original rule: l0 -> l0 : x^0'=-1+x^0, -1+x^0 >= 0, cost: 2 New rule: l0 -> l0 : x^0'=x^0-n0, (x^0-n0 >= 0 /\ n0 >= 0), cost: 2*n0 Sub-proof via acceration calculus written to file:///tmp/tmpnam_JNKbMM.txt Applied instantiation Original rule: l0 -> l0 : x^0'=x^0-n0, (x^0-n0 >= 0 /\ n0 >= 0), cost: 2*n0 New rule: l0 -> l0 : x^0'=0, (0 >= 0 /\ x^0 >= 0), cost: 2*x^0 Applied chaining First rule: l0 -> l0 : x^0'=-1+x^0, -1+x^0 >= 0, cost: 2 Second rule: l0 -> l0 : x^0'=x^post0, -1+x^0 >= 0, cost: 2 New rule: l0 -> l0 : x^0'=x^post0, -2+x^0 >= 0, cost: 4 Applied acceleration Original rule: l0 -> l0 : x^0'=x^post0, -2+x^0 >= 0, cost: 4 New rule: l0 -> l0 : x^0'=x^post0, (-2+x^0 >= 0 /\ -2+x^post0 >= 0 /\ -1+n1 >= 0), cost: 4*n1 Sub-proof via acceration calculus written to file:///tmp/tmpnam_JCIEoB.txt Applied nonterm Original rule: l0 -> l0 : x^0'=x^post0, -2+x^0 >= 0, cost: 4 New rule: l0 -> [5] : (-2+x^0 >= 0 /\ x^0-x^post0 <= 0), cost: NONTERM Sub-proof via acceration calculus written to file:///tmp/tmpnam_fLllcC.txt Applied chaining First rule: l0 -> l0 : x^0'=x^post0, -1+x^0 >= 0, cost: 2 Second rule: l0 -> [5] : (-2+x^0 >= 0 /\ x^0-x^post0 <= 0), cost: NONTERM New rule: l0 -> [5] : (0 <= 0 /\ -2+x^post0 >= 0 /\ -1+x^0 >= 0), cost: NONTERM Applied chaining First rule: l0 -> l0 : x^0'=x^post0, -1+x^0 >= 0, cost: 2 Second rule: l0 -> l0 : x^0'=-1+x^0, -1+x^0 >= 0, cost: 2 New rule: l0 -> l0 : x^0'=-1+x^post0, (-1+x^post0 >= 0 /\ -1+x^0 >= 0), cost: 4 Applied acceleration Original rule: l0 -> l0 : x^0'=-1+x^post0, (-1+x^post0 >= 0 /\ -1+x^0 >= 0), cost: 4 New rule: l0 -> l0 : x^0'=-1+x^post0, (-1+n2 >= 0 /\ -1+x^post0 >= 0 /\ -2+x^post0 >= 0 /\ -1+x^0 >= 0), cost: 4*n2 Sub-proof via acceration calculus written to file:///tmp/tmpnam_bBdCkd.txt Applied nonterm Original rule: l0 -> l0 : x^0'=-1+x^post0, (-1+x^post0 >= 0 /\ -1+x^0 >= 0), cost: 4 New rule: l0 -> [5] : (1+x^0-x^post0 <= 0 /\ -1+x^post0 >= 0 /\ -1+x^0 >= 0), cost: NONTERM Sub-proof via acceration calculus written to file:///tmp/tmpnam_goFDeH.txt Applied chaining First rule: l0 -> l0 : x^0'=-1+x^0, -1+x^0 >= 0, cost: 2 Second rule: l0 -> [5] : (1+x^0-x^post0 <= 0 /\ -1+x^post0 >= 0 /\ -1+x^0 >= 0), cost: NONTERM New rule: l0 -> [5] : (-2+x^0 >= 0 /\ x^0-x^post0 <= 0 /\ -1+x^post0 >= 0 /\ -1+x^0 >= 0), cost: NONTERM Applied chaining First rule: l0 -> l0 : x^0'=-1+x^0, -1+x^0 >= 0, cost: 2 Second rule: l0 -> l0 : x^0'=x^post0, (-1+x^post0 >= 0 /\ -1+n >= 0 /\ -1+x^0 >= 0), cost: 2*n New rule: l0 -> l0 : x^0'=x^post0, (-2+x^0 >= 0 /\ -1+x^post0 >= 0 /\ -1+n >= 0), cost: 2+2*n Applied acceleration Original rule: l0 -> l0 : x^0'=x^post0, (-2+x^0 >= 0 /\ -1+x^post0 >= 0 /\ -1+n >= 0), cost: 2+2*n New rule: l0 -> l0 : x^0'=x^post0, (-2+x^0 >= 0 /\ -1+x^post0 >= 0 /\ -1+n3 >= 0 /\ -2+x^post0 >= 0 /\ -1+n >= 0), cost: 2*n3+2*n3*n Sub-proof via acceration calculus written to file:///tmp/tmpnam_DhPFBI.txt Applied nonterm Original rule: l0 -> l0 : x^0'=x^post0, (-2+x^0 >= 0 /\ -1+x^post0 >= 0 /\ -1+n >= 0), cost: 2+2*n New rule: l0 -> [5] : (-2+x^0 >= 0 /\ x^0-x^post0 <= 0 /\ -1+x^post0 >= 0 /\ -1+n >= 0), cost: NONTERM Sub-proof via acceration calculus written to file:///tmp/tmpnam_MiJkDM.txt Applied chaining First rule: l0 -> l0 : x^0'=x^post0, (-1+x^post0 >= 0 /\ -1+n >= 0 /\ -1+x^0 >= 0), cost: 2*n Second rule: l0 -> [5] : (-2+x^0 >= 0 /\ x^0-x^post0 <= 0 /\ -1+x^post0 >= 0 /\ -1+n >= 0), cost: NONTERM New rule: l0 -> [5] : (0 <= 0 /\ -1+x^post0 >= 0 /\ -2+x^post0 >= 0 /\ -1+n >= 0 /\ -1+x^0 >= 0), cost: NONTERM Applied chaining First rule: l0 -> l0 : x^0'=x^post0, (-1+x^post0 >= 0 /\ -1+n >= 0 /\ -1+x^0 >= 0), cost: 2*n Second rule: l0 -> l0 : x^0'=-1+x^0, -1+x^0 >= 0, cost: 2 New rule: l0 -> l0 : x^0'=-1+x^post0, (-1+x^post0 >= 0 /\ -1+n >= 0 /\ -1+x^0 >= 0), cost: 2+2*n Applied acceleration Original rule: l0 -> l0 : x^0'=-1+x^post0, (-1+x^post0 >= 0 /\ -1+n >= 0 /\ -1+x^0 >= 0), cost: 2+2*n New rule: l0 -> l0 : x^0'=-1+x^post0, (-1+x^post0 >= 0 /\ -1+n4 >= 0 /\ -2+x^post0 >= 0 /\ -1+n >= 0 /\ -1+x^0 >= 0), cost: 2*n4+2*n*n4 Sub-proof via acceration calculus written to file:///tmp/tmpnam_bNgaLn.txt Applied nonterm Original rule: l0 -> l0 : x^0'=-1+x^post0, (-1+x^post0 >= 0 /\ -1+n >= 0 /\ -1+x^0 >= 0), cost: 2+2*n New rule: l0 -> [5] : (1+x^0-x^post0 <= 0 /\ -1+x^post0 >= 0 /\ -1+n >= 0 /\ -1+x^0 >= 0), cost: NONTERM Sub-proof via acceration calculus written to file:///tmp/tmpnam_LEmlhJ.txt Applied chaining First rule: l0 -> l0 : x^0'=-1+x^0, -1+x^0 >= 0, cost: 2 Second rule: l0 -> [5] : (1+x^0-x^post0 <= 0 /\ -1+x^post0 >= 0 /\ -1+n >= 0 /\ -1+x^0 >= 0), cost: NONTERM New rule: l0 -> [5] : (-2+x^0 >= 0 /\ x^0-x^post0 <= 0 /\ -1+x^post0 >= 0 /\ -1+n >= 0 /\ -1+x^0 >= 0), cost: NONTERM Applied simplification Original rule: l0 -> l0 : x^0'=0, (0 >= 0 /\ x^0 >= 0), cost: 2*x^0 New rule: l0 -> l0 : x^0'=0, x^0 >= 0, cost: 2*x^0 Applied simplification Original rule: l0 -> [5] : (0 <= 0 /\ -2+x^post0 >= 0 /\ -1+x^0 >= 0), cost: NONTERM New rule: l0 -> [5] : (-2+x^post0 >= 0 /\ -1+x^0 >= 0), cost: NONTERM Applied simplification Original rule: l0 -> [5] : (1+x^0-x^post0 <= 0 /\ -1+x^post0 >= 0 /\ -1+x^0 >= 0), cost: NONTERM New rule: l0 -> [5] : (1+x^0-x^post0 <= 0 /\ -1+x^0 >= 0), cost: NONTERM Applied simplification Original rule: l0 -> [5] : (-2+x^0 >= 0 /\ x^0-x^post0 <= 0 /\ -1+x^post0 >= 0 /\ -1+x^0 >= 0), cost: NONTERM New rule: l0 -> [5] : (-2+x^0 >= 0 /\ x^0-x^post0 <= 0), cost: NONTERM Applied simplification Original rule: l0 -> [5] : (-2+x^0 >= 0 /\ x^0-x^post0 <= 0 /\ -1+x^post0 >= 0 /\ -1+n >= 0), cost: NONTERM New rule: l0 -> [5] : (-2+x^0 >= 0 /\ x^0-x^post0 <= 0 /\ -1+n >= 0), cost: NONTERM Applied simplification Original rule: l0 -> [5] : (0 <= 0 /\ -1+x^post0 >= 0 /\ -2+x^post0 >= 0 /\ -1+n >= 0 /\ -1+x^0 >= 0), cost: NONTERM New rule: l0 -> [5] : (-2+x^post0 >= 0 /\ -1+n >= 0 /\ -1+x^0 >= 0), cost: NONTERM Applied simplification Original rule: l0 -> [5] : (1+x^0-x^post0 <= 0 /\ -1+x^post0 >= 0 /\ -1+n >= 0 /\ -1+x^0 >= 0), cost: NONTERM New rule: l0 -> [5] : (1+x^0-x^post0 <= 0 /\ -1+n >= 0 /\ -1+x^0 >= 0), cost: NONTERM Applied simplification Original rule: l0 -> [5] : (-2+x^0 >= 0 /\ x^0-x^post0 <= 0 /\ -1+x^post0 >= 0 /\ -1+n >= 0 /\ -1+x^0 >= 0), cost: NONTERM New rule: l0 -> [5] : (-2+x^0 >= 0 /\ x^0-x^post0 <= 0 /\ -1+n >= 0), cost: NONTERM Applied deletion Removed the following rules: 13 14 Accelerated simple loops Start location: l4 15: l0 -> l0 : x^0'=x^post0, (-1+x^post0 >= 0 /\ -1+n >= 0 /\ -1+x^0 >= 0), cost: 2*n 16: l0 -> [5] : (x^0-x^post0 <= 0 /\ -1+x^0 >= 0), cost: NONTERM 18: l0 -> [5] : (-2+x^0 >= 0 /\ x^0-x^post0 <= 0), cost: NONTERM 26: l0 -> l0 : x^0'=0, x^0 >= 0, cost: 2*x^0 27: l0 -> [5] : (-2+x^post0 >= 0 /\ -1+x^0 >= 0), cost: NONTERM 28: l0 -> [5] : (1+x^0-x^post0 <= 0 /\ -1+x^0 >= 0), cost: NONTERM 29: l0 -> [5] : (-2+x^0 >= 0 /\ x^0-x^post0 <= 0 /\ -1+n >= 0), cost: NONTERM 30: l0 -> [5] : (-2+x^post0 >= 0 /\ -1+n >= 0 /\ -1+x^0 >= 0), cost: NONTERM 31: l0 -> [5] : (1+x^0-x^post0 <= 0 /\ -1+n >= 0 /\ -1+x^0 >= 0), cost: NONTERM 12: l4 -> l0 : TRUE, cost: 2 Applied chaining First rule: l4 -> l0 : TRUE, cost: 2 Second rule: l0 -> l0 : x^0'=x^post0, (-1+x^post0 >= 0 /\ -1+n >= 0 /\ -1+x^0 >= 0), cost: 2*n New rule: l4 -> l0 : x^0'=x^post0, (-1+x^post0 >= 0 /\ -1+n >= 0 /\ -1+x^0 >= 0), cost: 2+2*n Applied chaining First rule: l4 -> l0 : TRUE, cost: 2 Second rule: l0 -> [5] : (x^0-x^post0 <= 0 /\ -1+x^0 >= 0), cost: NONTERM New rule: l4 -> [5] : -1+x^0 >= 0, cost: NONTERM Applied chaining First rule: l4 -> l0 : TRUE, cost: 2 Second rule: l0 -> [5] : (-2+x^0 >= 0 /\ x^0-x^post0 <= 0), cost: NONTERM New rule: l4 -> [5] : -2+x^0 >= 0, cost: NONTERM Applied chaining First rule: l4 -> l0 : TRUE, cost: 2 Second rule: l0 -> l0 : x^0'=0, x^0 >= 0, cost: 2*x^0 New rule: l4 -> l0 : x^0'=0, x^0 >= 0, cost: 2+2*x^0 Applied chaining First rule: l4 -> l0 : TRUE, cost: 2 Second rule: l0 -> [5] : (-2+x^post0 >= 0 /\ -1+x^0 >= 0), cost: NONTERM New rule: l4 -> [5] : -1+x^0 >= 0, cost: NONTERM Applied chaining First rule: l4 -> l0 : TRUE, cost: 2 Second rule: l0 -> [5] : (1+x^0-x^post0 <= 0 /\ -1+x^0 >= 0), cost: NONTERM New rule: l4 -> [5] : -1+x^0 >= 0, cost: NONTERM Applied chaining First rule: l4 -> l0 : TRUE, cost: 2 Second rule: l0 -> [5] : (-2+x^0 >= 0 /\ x^0-x^post0 <= 0 /\ -1+n >= 0), cost: NONTERM New rule: l4 -> [5] : -2+x^0 >= 0, cost: NONTERM Applied chaining First rule: l4 -> l0 : TRUE, cost: 2 Second rule: l0 -> [5] : (-2+x^post0 >= 0 /\ -1+n >= 0 /\ -1+x^0 >= 0), cost: NONTERM New rule: l4 -> [5] : -1+x^0 >= 0, cost: NONTERM Applied chaining First rule: l4 -> l0 : TRUE, cost: 2 Second rule: l0 -> [5] : (1+x^0-x^post0 <= 0 /\ -1+n >= 0 /\ -1+x^0 >= 0), cost: NONTERM New rule: l4 -> [5] : -1+x^0 >= 0, cost: NONTERM Applied deletion Removed the following rules: 15 16 18 26 27 28 29 30 31 Chained accelerated rules with incoming rules Start location: l4 12: l4 -> l0 : TRUE, cost: 2 32: l4 -> l0 : x^0'=x^post0, (-1+x^post0 >= 0 /\ -1+n >= 0 /\ -1+x^0 >= 0), cost: 2+2*n 33: l4 -> [5] : -1+x^0 >= 0, cost: NONTERM 34: l4 -> [5] : -2+x^0 >= 0, cost: NONTERM 35: l4 -> l0 : x^0'=0, x^0 >= 0, cost: 2+2*x^0 Removed unreachable locations and irrelevant leafs Start location: l4 33: l4 -> [5] : -1+x^0 >= 0, cost: NONTERM 34: l4 -> [5] : -2+x^0 >= 0, cost: NONTERM Computing asymptotic complexity Proved nontermination of rule 33 via SMT. Proved the following lower bound Complexity: Nonterm Cpx degree: Nonterm Solved cost: NONTERM Rule cost: NONTERM Rule guard: -1+x^0 >= 0