NO Solver Timeout: 4 Global Timeout: 300 No parsing errors! Init Location: 0 Transitions: undef18}> (0 + y^0)}> undef58}> undef76}> undef94}> undef112}> undef130}> undef148}> undef166}> undef184}> undef202}> undef206}> undef224}> undef242}> undef260}> undef278}> Fresh variables: undef18, undef58, undef76, undef94, undef112, undef130, undef148, undef166, undef184, undef202, undef206, undef224, undef242, undef260, undef278, Undef variables: undef18, undef58, undef76, undef94, undef112, undef130, undef148, undef166, undef184, undef202, undef206, undef224, undef242, undef260, undef278, Abstraction variables: Exit nodes: Accepting locations: Asserts: Preprocessed LLVMGraph Init Location: 0 Transitions: undef18, __disjvr_10^0 -> undef206, __disjvr_11^0 -> undef224, __disjvr_12^0 -> undef242, __disjvr_13^0 -> undef260, __disjvr_14^0 -> undef278, __disjvr_1^0 -> undef58, __disjvr_2^0 -> undef76, __disjvr_3^0 -> undef94, __disjvr_4^0 -> undef112, __disjvr_5^0 -> undef130, __disjvr_6^0 -> undef148, __disjvr_7^0 -> undef166, __disjvr_8^0 -> undef184, __disjvr_9^0 -> undef202, x^0 -> (0 + y^0)}> Fresh variables: undef18, undef58, undef76, undef94, undef112, undef130, undef148, undef166, undef184, undef202, undef206, undef224, undef242, undef260, undef278, Undef variables: undef18, undef58, undef76, undef94, undef112, undef130, undef148, undef166, undef184, undef202, undef206, undef224, undef242, undef260, undef278, Abstraction variables: Exit nodes: Accepting locations: Asserts: ************************************************************* ******************************************************************************************* *********************** WORKING TRANSITION SYSTEM (DAG) *********************** ******************************************************************************************* Init Location: 0 Graph 0: Transitions: Variables: Graph 1: Transitions: undef18, __disjvr_10^0 -> undef206, __disjvr_11^0 -> undef224, __disjvr_12^0 -> undef242, __disjvr_13^0 -> undef260, __disjvr_14^0 -> undef278, __disjvr_1^0 -> undef58, __disjvr_2^0 -> undef76, __disjvr_3^0 -> undef94, __disjvr_4^0 -> undef112, __disjvr_5^0 -> undef130, __disjvr_6^0 -> undef148, __disjvr_7^0 -> undef166, __disjvr_8^0 -> undef184, __disjvr_9^0 -> undef202, x^0 -> y^0, rest remain the same}> Variables: __disjvr_0^0, __disjvr_10^0, __disjvr_11^0, __disjvr_12^0, __disjvr_13^0, __disjvr_14^0, __disjvr_1^0, __disjvr_2^0, __disjvr_3^0, __disjvr_4^0, __disjvr_5^0, __disjvr_6^0, __disjvr_7^0, __disjvr_8^0, __disjvr_9^0, x^0, y^0 Precedence: Graph 0 Graph 1 Map Locations to Subgraph: ( 0 , 0 ) ( 2 , 1 ) ******************************************************************************************* ******************************** CHECKING ASSERTIONS ******************************** ******************************************************************************************* Proving termination of subgraph 0 Proving termination of subgraph 1 Checking unfeasibility... Time used: 0.007218 Checking conditional termination of SCC {l2}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001348s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.007065s Trying to remove transition: undef18, __disjvr_10^0 -> undef206, __disjvr_11^0 -> undef224, __disjvr_12^0 -> undef242, __disjvr_13^0 -> undef260, __disjvr_14^0 -> undef278, __disjvr_1^0 -> undef58, __disjvr_2^0 -> undef76, __disjvr_3^0 -> undef94, __disjvr_4^0 -> undef112, __disjvr_5^0 -> undef130, __disjvr_6^0 -> undef148, __disjvr_7^0 -> undef166, __disjvr_8^0 -> undef184, __disjvr_9^0 -> undef202, x^0 -> y^0, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.016601s Time used: 0.015812 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.024430s Time used: 0.021932 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.020673s Time used: 0.020671 LOG: SAT solveNonLinear - Elapsed time: 0.045104s Cost: 1; Total time: 0.042603 Failed at location 2: 1 + x^0 <= 0 Before Improving: Quasi-invariant at l2: 1 + x^0 <= 0 Optimizing invariants... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.007457s Remaining time after improvement: 0.996531 Termination implied by a set of quasi-invariant(s): Quasi-invariant at l2: 1 + x^0 <= 0 [ Invariant Graph ] Strengthening and disabling transitions... LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility It's unfeasible. Removing transition: undef18, __disjvr_10^0 -> undef206, __disjvr_11^0 -> undef224, __disjvr_12^0 -> undef242, __disjvr_13^0 -> undef260, __disjvr_14^0 -> undef278, __disjvr_1^0 -> undef58, __disjvr_2^0 -> undef76, __disjvr_3^0 -> undef94, __disjvr_4^0 -> undef112, __disjvr_5^0 -> undef130, __disjvr_6^0 -> undef148, __disjvr_7^0 -> undef166, __disjvr_8^0 -> undef184, __disjvr_9^0 -> undef202, x^0 -> y^0, rest remain the same}> [ Termination Graph ] Strengthening and disabling transitions... LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility It's unfeasible. Removing transition: undef18, __disjvr_10^0 -> undef206, __disjvr_11^0 -> undef224, __disjvr_12^0 -> undef242, __disjvr_13^0 -> undef260, __disjvr_14^0 -> undef278, __disjvr_1^0 -> undef58, __disjvr_2^0 -> undef76, __disjvr_3^0 -> undef94, __disjvr_4^0 -> undef112, __disjvr_5^0 -> undef130, __disjvr_6^0 -> undef148, __disjvr_7^0 -> undef166, __disjvr_8^0 -> undef184, __disjvr_9^0 -> undef202, x^0 -> y^0, rest remain the same}> New Graphs: Calling Safety with literal 1 + x^0 <= 0 and entry LOG: CALL check - Post:1 + x^0 <= 0 - Process 1 * Exit transition: * Postcondition : 1 + x^0 <= 0 LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000477s > Postcondition is not implied! LOG: RETURN check - Elapsed time: 0.000502s INVARIANTS: 2: Quasi-INVARIANTS to narrow Graph: 2: 1 + x^0 <= 0 , Narrowing transition: undef18, __disjvr_10^0 -> undef206, __disjvr_11^0 -> undef224, __disjvr_12^0 -> undef242, __disjvr_13^0 -> undef260, __disjvr_14^0 -> undef278, __disjvr_1^0 -> undef58, __disjvr_2^0 -> undef76, __disjvr_3^0 -> undef94, __disjvr_4^0 -> undef112, __disjvr_5^0 -> undef130, __disjvr_6^0 -> undef148, __disjvr_7^0 -> undef166, __disjvr_8^0 -> undef184, __disjvr_9^0 -> undef202, x^0 -> y^0, rest remain the same}> LOG: Narrow transition size 1 invGraph after Narrowing: Transitions: undef18, __disjvr_10^0 -> undef206, __disjvr_11^0 -> undef224, __disjvr_12^0 -> undef242, __disjvr_13^0 -> undef260, __disjvr_14^0 -> undef278, __disjvr_1^0 -> undef58, __disjvr_2^0 -> undef76, __disjvr_3^0 -> undef94, __disjvr_4^0 -> undef112, __disjvr_5^0 -> undef130, __disjvr_6^0 -> undef148, __disjvr_7^0 -> undef166, __disjvr_8^0 -> undef184, __disjvr_9^0 -> undef202, x^0 -> y^0, rest remain the same}> Variables: __disjvr_0^0, __disjvr_10^0, __disjvr_11^0, __disjvr_12^0, __disjvr_13^0, __disjvr_14^0, __disjvr_1^0, __disjvr_2^0, __disjvr_3^0, __disjvr_4^0, __disjvr_5^0, __disjvr_6^0, __disjvr_7^0, __disjvr_8^0, __disjvr_9^0, x^0, y^0 Checking conditional termination of SCC {l2}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001021s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.005562s Trying to remove transition: undef18, __disjvr_10^0 -> undef206, __disjvr_11^0 -> undef224, __disjvr_12^0 -> undef242, __disjvr_13^0 -> undef260, __disjvr_14^0 -> undef278, __disjvr_1^0 -> undef58, __disjvr_2^0 -> undef76, __disjvr_3^0 -> undef94, __disjvr_4^0 -> undef112, __disjvr_5^0 -> undef130, __disjvr_6^0 -> undef148, __disjvr_7^0 -> undef166, __disjvr_8^0 -> undef184, __disjvr_9^0 -> undef202, x^0 -> y^0, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.012325s Time used: 0.011446 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.028926s Time used: 0.026313 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.017161s Time used: 0.017159 LOG: SAT solveNonLinear - Elapsed time: 0.046087s Cost: 1; Total time: 0.043472 Failed at location 2: 1 + y^0 <= 0 Before Improving: Quasi-invariant at l2: 1 + y^0 <= 0 Optimizing invariants... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.007451s Remaining time after improvement: 0.996518 Termination implied by a set of quasi-invariant(s): Quasi-invariant at l2: 1 + y^0 <= 0 [ Invariant Graph ] Strengthening and disabling transitions... LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility Strengthening transition (result): undef18, __disjvr_10^0 -> undef206, __disjvr_11^0 -> undef224, __disjvr_12^0 -> undef242, __disjvr_13^0 -> undef260, __disjvr_14^0 -> undef278, __disjvr_1^0 -> undef58, __disjvr_2^0 -> undef76, __disjvr_3^0 -> undef94, __disjvr_4^0 -> undef112, __disjvr_5^0 -> undef130, __disjvr_6^0 -> undef148, __disjvr_7^0 -> undef166, __disjvr_8^0 -> undef184, __disjvr_9^0 -> undef202, x^0 -> y^0, rest remain the same}> [ Termination Graph ] Strengthening and disabling transitions... LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility Strengthening transition (result): undef18, __disjvr_10^0 -> undef206, __disjvr_11^0 -> undef224, __disjvr_12^0 -> undef242, __disjvr_13^0 -> undef260, __disjvr_14^0 -> undef278, __disjvr_1^0 -> undef58, __disjvr_2^0 -> undef76, __disjvr_3^0 -> undef94, __disjvr_4^0 -> undef112, __disjvr_5^0 -> undef130, __disjvr_6^0 -> undef148, __disjvr_7^0 -> undef166, __disjvr_8^0 -> undef184, __disjvr_9^0 -> undef202, x^0 -> y^0, rest remain the same}> Ranking function: x^0 New Graphs: Calling Safety with literal 1 + y^0 <= 0 and entry LOG: CALL check - Post:1 + y^0 <= 0 - Process 2 * Exit transition: * Postcondition : 1 + y^0 <= 0 LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000369s > Postcondition is not implied! LOG: RETURN check - Elapsed time: 0.000396s INVARIANTS: 2: Quasi-INVARIANTS to narrow Graph: 2: 1 + y^0 <= 0 , Narrowing transition: undef18, __disjvr_10^0 -> undef206, __disjvr_11^0 -> undef224, __disjvr_12^0 -> undef242, __disjvr_13^0 -> undef260, __disjvr_14^0 -> undef278, __disjvr_1^0 -> undef58, __disjvr_2^0 -> undef76, __disjvr_3^0 -> undef94, __disjvr_4^0 -> undef112, __disjvr_5^0 -> undef130, __disjvr_6^0 -> undef148, __disjvr_7^0 -> undef166, __disjvr_8^0 -> undef184, __disjvr_9^0 -> undef202, x^0 -> y^0, rest remain the same}> LOG: Narrow transition size 1 invGraph after Narrowing: Transitions: undef18, __disjvr_10^0 -> undef206, __disjvr_11^0 -> undef224, __disjvr_12^0 -> undef242, __disjvr_13^0 -> undef260, __disjvr_14^0 -> undef278, __disjvr_1^0 -> undef58, __disjvr_2^0 -> undef76, __disjvr_3^0 -> undef94, __disjvr_4^0 -> undef112, __disjvr_5^0 -> undef130, __disjvr_6^0 -> undef148, __disjvr_7^0 -> undef166, __disjvr_8^0 -> undef184, __disjvr_9^0 -> undef202, x^0 -> y^0, rest remain the same}> Variables: __disjvr_0^0, __disjvr_10^0, __disjvr_11^0, __disjvr_12^0, __disjvr_13^0, __disjvr_14^0, __disjvr_1^0, __disjvr_2^0, __disjvr_3^0, __disjvr_4^0, __disjvr_5^0, __disjvr_6^0, __disjvr_7^0, __disjvr_8^0, __disjvr_9^0, x^0, y^0 Checking conditional termination of SCC {l2}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001084s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.006042s Trying to remove transition: undef18, __disjvr_10^0 -> undef206, __disjvr_11^0 -> undef224, __disjvr_12^0 -> undef242, __disjvr_13^0 -> undef260, __disjvr_14^0 -> undef278, __disjvr_1^0 -> undef58, __disjvr_2^0 -> undef76, __disjvr_3^0 -> undef94, __disjvr_4^0 -> undef112, __disjvr_5^0 -> undef130, __disjvr_6^0 -> undef148, __disjvr_7^0 -> undef166, __disjvr_8^0 -> undef184, __disjvr_9^0 -> undef202, x^0 -> y^0, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.011605s Time used: 0.010687 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.023328s Time used: 0.020831 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.015122s Time used: 0.015119 LOG: SAT solveNonLinear - Elapsed time: 0.038450s Cost: 1; Total time: 0.03595 Failed at location 2: 1 <= x^0 Before Improving: Quasi-invariant at l2: 1 <= x^0 Optimizing invariants... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.007571s Remaining time after improvement: 0.996355 Termination implied by a set of quasi-invariant(s): Quasi-invariant at l2: 1 <= x^0 [ Invariant Graph ] Strengthening and disabling transitions... LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility It's unfeasible. Removing transition: undef18, __disjvr_10^0 -> undef206, __disjvr_11^0 -> undef224, __disjvr_12^0 -> undef242, __disjvr_13^0 -> undef260, __disjvr_14^0 -> undef278, __disjvr_1^0 -> undef58, __disjvr_2^0 -> undef76, __disjvr_3^0 -> undef94, __disjvr_4^0 -> undef112, __disjvr_5^0 -> undef130, __disjvr_6^0 -> undef148, __disjvr_7^0 -> undef166, __disjvr_8^0 -> undef184, __disjvr_9^0 -> undef202, x^0 -> y^0, rest remain the same}> [ Termination Graph ] Strengthening and disabling transitions... > It's unfeasible. Removing transition: undef18, __disjvr_10^0 -> undef206, __disjvr_11^0 -> undef224, __disjvr_12^0 -> undef242, __disjvr_13^0 -> undef260, __disjvr_14^0 -> undef278, __disjvr_1^0 -> undef58, __disjvr_2^0 -> undef76, __disjvr_3^0 -> undef94, __disjvr_4^0 -> undef112, __disjvr_5^0 -> undef130, __disjvr_6^0 -> undef148, __disjvr_7^0 -> undef166, __disjvr_8^0 -> undef184, __disjvr_9^0 -> undef202, x^0 -> y^0, rest remain the same}> New Graphs: Calling Safety with literal 1 <= x^0 and entry LOG: CALL check - Post:1 <= x^0 - Process 3 * Exit transition: * Postcondition : 1 <= x^0 LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000599s > Postcondition is not implied! LOG: RETURN check - Elapsed time: 0.000632s INVARIANTS: 2: Quasi-INVARIANTS to narrow Graph: 2: 1 <= x^0 , Narrowing transition: undef18, __disjvr_10^0 -> undef206, __disjvr_11^0 -> undef224, __disjvr_12^0 -> undef242, __disjvr_13^0 -> undef260, __disjvr_14^0 -> undef278, __disjvr_1^0 -> undef58, __disjvr_2^0 -> undef76, __disjvr_3^0 -> undef94, __disjvr_4^0 -> undef112, __disjvr_5^0 -> undef130, __disjvr_6^0 -> undef148, __disjvr_7^0 -> undef166, __disjvr_8^0 -> undef184, __disjvr_9^0 -> undef202, x^0 -> y^0, rest remain the same}> LOG: Narrow transition size 1 invGraph after Narrowing: Transitions: undef18, __disjvr_10^0 -> undef206, __disjvr_11^0 -> undef224, __disjvr_12^0 -> undef242, __disjvr_13^0 -> undef260, __disjvr_14^0 -> undef278, __disjvr_1^0 -> undef58, __disjvr_2^0 -> undef76, __disjvr_3^0 -> undef94, __disjvr_4^0 -> undef112, __disjvr_5^0 -> undef130, __disjvr_6^0 -> undef148, __disjvr_7^0 -> undef166, __disjvr_8^0 -> undef184, __disjvr_9^0 -> undef202, x^0 -> y^0, rest remain the same}> Variables: __disjvr_0^0, __disjvr_10^0, __disjvr_11^0, __disjvr_12^0, __disjvr_13^0, __disjvr_14^0, __disjvr_1^0, __disjvr_2^0, __disjvr_3^0, __disjvr_4^0, __disjvr_5^0, __disjvr_6^0, __disjvr_7^0, __disjvr_8^0, __disjvr_9^0, x^0, y^0 Checking conditional termination of SCC {l2}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001091s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.006073s Trying to remove transition: undef18, __disjvr_10^0 -> undef206, __disjvr_11^0 -> undef224, __disjvr_12^0 -> undef242, __disjvr_13^0 -> undef260, __disjvr_14^0 -> undef278, __disjvr_1^0 -> undef58, __disjvr_2^0 -> undef76, __disjvr_3^0 -> undef94, __disjvr_4^0 -> undef112, __disjvr_5^0 -> undef130, __disjvr_6^0 -> undef148, __disjvr_7^0 -> undef166, __disjvr_8^0 -> undef184, __disjvr_9^0 -> undef202, x^0 -> y^0, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.011906s Time used: 0.010928 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.026837s Time used: 0.024167 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.017083s Time used: 0.01708 LOG: SAT solveNonLinear - Elapsed time: 0.043920s Cost: 1; Total time: 0.041247 Failed at location 2: 1 <= y^0 Before Improving: Quasi-invariant at l2: 1 <= y^0 Optimizing invariants... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.007793s Remaining time after improvement: 0.996328 Termination implied by a set of quasi-invariant(s): Quasi-invariant at l2: 1 <= y^0 [ Invariant Graph ] Strengthening and disabling transitions... LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility Strengthening transition (result): undef18, __disjvr_10^0 -> undef206, __disjvr_11^0 -> undef224, __disjvr_12^0 -> undef242, __disjvr_13^0 -> undef260, __disjvr_14^0 -> undef278, __disjvr_1^0 -> undef58, __disjvr_2^0 -> undef76, __disjvr_3^0 -> undef94, __disjvr_4^0 -> undef112, __disjvr_5^0 -> undef130, __disjvr_6^0 -> undef148, __disjvr_7^0 -> undef166, __disjvr_8^0 -> undef184, __disjvr_9^0 -> undef202, x^0 -> y^0, rest remain the same}> [ Termination Graph ] Strengthening and disabling transitions... LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility Strengthening transition (result): undef18, __disjvr_10^0 -> undef206, __disjvr_11^0 -> undef224, __disjvr_12^0 -> undef242, __disjvr_13^0 -> undef260, __disjvr_14^0 -> undef278, __disjvr_1^0 -> undef58, __disjvr_2^0 -> undef76, __disjvr_3^0 -> undef94, __disjvr_4^0 -> undef112, __disjvr_5^0 -> undef130, __disjvr_6^0 -> undef148, __disjvr_7^0 -> undef166, __disjvr_8^0 -> undef184, __disjvr_9^0 -> undef202, x^0 -> y^0, rest remain the same}> Ranking function: -x^0 New Graphs: Calling Safety with literal 1 <= y^0 and entry LOG: CALL check - Post:1 <= y^0 - Process 4 * Exit transition: * Postcondition : 1 <= y^0 LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000464s > Postcondition is not implied! LOG: RETURN check - Elapsed time: 0.000495s INVARIANTS: 2: Quasi-INVARIANTS to narrow Graph: 2: 1 <= y^0 , Narrowing transition: undef18, __disjvr_10^0 -> undef206, __disjvr_11^0 -> undef224, __disjvr_12^0 -> undef242, __disjvr_13^0 -> undef260, __disjvr_14^0 -> undef278, __disjvr_1^0 -> undef58, __disjvr_2^0 -> undef76, __disjvr_3^0 -> undef94, __disjvr_4^0 -> undef112, __disjvr_5^0 -> undef130, __disjvr_6^0 -> undef148, __disjvr_7^0 -> undef166, __disjvr_8^0 -> undef184, __disjvr_9^0 -> undef202, x^0 -> y^0, rest remain the same}> LOG: Narrow transition size 1 invGraph after Narrowing: Transitions: undef18, __disjvr_10^0 -> undef206, __disjvr_11^0 -> undef224, __disjvr_12^0 -> undef242, __disjvr_13^0 -> undef260, __disjvr_14^0 -> undef278, __disjvr_1^0 -> undef58, __disjvr_2^0 -> undef76, __disjvr_3^0 -> undef94, __disjvr_4^0 -> undef112, __disjvr_5^0 -> undef130, __disjvr_6^0 -> undef148, __disjvr_7^0 -> undef166, __disjvr_8^0 -> undef184, __disjvr_9^0 -> undef202, x^0 -> y^0, rest remain the same}> Variables: __disjvr_0^0, __disjvr_10^0, __disjvr_11^0, __disjvr_12^0, __disjvr_13^0, __disjvr_14^0, __disjvr_1^0, __disjvr_2^0, __disjvr_3^0, __disjvr_4^0, __disjvr_5^0, __disjvr_6^0, __disjvr_7^0, __disjvr_8^0, __disjvr_9^0, x^0, y^0 Checking conditional termination of SCC {l2}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001064s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.005867s Trying to remove transition: undef18, __disjvr_10^0 -> undef206, __disjvr_11^0 -> undef224, __disjvr_12^0 -> undef242, __disjvr_13^0 -> undef260, __disjvr_14^0 -> undef278, __disjvr_1^0 -> undef58, __disjvr_2^0 -> undef76, __disjvr_3^0 -> undef94, __disjvr_4^0 -> undef112, __disjvr_5^0 -> undef130, __disjvr_6^0 -> undef148, __disjvr_7^0 -> undef166, __disjvr_8^0 -> undef184, __disjvr_9^0 -> undef202, x^0 -> y^0, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.011904s Time used: 0.010904 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.028598s Time used: 0.02617 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.002727s Time used: 4.00003 Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 1.018365s Time used: 1.0001 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.017466s Time used: 0.014862 Proving non-termination of subgraph 1 Transitions: undef18, __disjvr_10^0 -> undef206, __disjvr_11^0 -> undef224, __disjvr_12^0 -> undef242, __disjvr_13^0 -> undef260, __disjvr_14^0 -> undef278, __disjvr_1^0 -> undef58, __disjvr_2^0 -> undef76, __disjvr_3^0 -> undef94, __disjvr_4^0 -> undef112, __disjvr_5^0 -> undef130, __disjvr_6^0 -> undef148, __disjvr_7^0 -> undef166, __disjvr_8^0 -> undef184, __disjvr_9^0 -> undef202, x^0 -> y^0, rest remain the same}> Variables: __disjvr_0^0, __disjvr_10^0, __disjvr_11^0, __disjvr_12^0, __disjvr_13^0, __disjvr_14^0, __disjvr_1^0, __disjvr_2^0, __disjvr_3^0, __disjvr_4^0, __disjvr_5^0, __disjvr_6^0, __disjvr_7^0, __disjvr_8^0, __disjvr_9^0, x^0, y^0 Checking that every undef value has an assignment... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.007446s Checking conditional non-termination of SCC {l2}... EXIT TRANSITIONS: Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.635344s Time used: 0.633254 Improving Solution with cost 4 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.820325s Time used: 0.820303 LOG: SAT solveNonLinear - Elapsed time: 1.455669s Cost: 4; Total time: 1.45356 Failed at location 2: y^0 <= 0 Before Improving: Quasi-invariant at l2: y^0 <= 0 Optimizing invariants... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.031172s Remaining time after improvement: 0.989334 Minimizing number of undef constraints... LOG: CALL solveNonLinear LOG: RETURN solveNonLinear - Elapsed time: 0.016574s Number of undef constraints reduced! Non-termination implied by a set of quasi-invariant(s): Quasi-invariant at l2: y^0 <= 0 Strengthening and disabling EXIT transitions... Closed exits from l2: 3 Strengthening exit transition (result): Strengthening exit transition (result): Strengthening exit transition (result): Strengthening and disabling transitions... LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility Strengthening transition (result): undef18, __disjvr_10^0 -> undef206, __disjvr_11^0 -> undef224, __disjvr_12^0 -> undef242, __disjvr_13^0 -> undef260, __disjvr_14^0 -> undef278, __disjvr_1^0 -> undef58, __disjvr_2^0 -> undef76, __disjvr_3^0 -> undef94, __disjvr_4^0 -> undef112, __disjvr_5^0 -> undef130, __disjvr_6^0 -> undef148, __disjvr_7^0 -> undef166, __disjvr_8^0 -> undef184, __disjvr_9^0 -> undef202, x^0 -> y^0, rest remain the same}> Checking conditional non-termination of SCC {l2}... EXIT TRANSITIONS: Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.517469s Time used: 0.515793 Improving Solution with cost 2 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 1.001997s Time used: 1.00184 LOG: SAT solveNonLinear - Elapsed time: 1.519466s Cost: 2; Total time: 1.51763 Failed at location 2: x^0 <= y^0 Before Improving: Quasi-invariant at l2: x^0 <= y^0 Optimizing invariants... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.032501s Remaining time after improvement: 0.987657 Minimizing number of undef constraints... LOG: CALL solveNonLinear LOG: RETURN solveNonLinear - Elapsed time: 0.016915s Number of undef constraints reduced! Non-termination implied by a set of quasi-invariant(s): Quasi-invariant at l2: x^0 <= y^0 Strengthening and disabling EXIT transitions... Closed exits from l2: 2 Strengthening exit transition (result): Strengthening and disabling transitions... LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility Strengthening transition (result): undef18, __disjvr_10^0 -> undef206, __disjvr_11^0 -> undef224, __disjvr_12^0 -> undef242, __disjvr_13^0 -> undef260, __disjvr_14^0 -> undef278, __disjvr_1^0 -> undef58, __disjvr_2^0 -> undef76, __disjvr_3^0 -> undef94, __disjvr_4^0 -> undef112, __disjvr_5^0 -> undef130, __disjvr_6^0 -> undef148, __disjvr_7^0 -> undef166, __disjvr_8^0 -> undef184, __disjvr_9^0 -> undef202, x^0 -> y^0, rest remain the same}> Checking conditional non-termination of SCC {l2}... EXIT TRANSITIONS: Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.397978s Time used: 0.396216 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.174514s Time used: 0.17451 LOG: SAT solveNonLinear - Elapsed time: 0.572492s Cost: 1; Total time: 0.570726 Failed at location 2: 0 <= x^0 Before Improving: Quasi-invariant at l2: 0 <= x^0 Optimizing invariants... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.032565s Remaining time after improvement: 0.986811 Minimizing number of undef constraints... LOG: CALL solveNonLinear LOG: RETURN solveNonLinear - Elapsed time: 0.017368s Number of undef constraints reduced! Non-termination implied by a set of quasi-invariant(s): Quasi-invariant at l2: 0 <= x^0 Strengthening and disabling EXIT transitions... Closed exits from l2: 1 Strengthening and disabling transitions... LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility Strengthening transition (result): undef18, __disjvr_10^0 -> undef206, __disjvr_11^0 -> undef224, __disjvr_12^0 -> undef242, __disjvr_13^0 -> undef260, __disjvr_14^0 -> undef278, __disjvr_1^0 -> undef58, __disjvr_2^0 -> undef76, __disjvr_3^0 -> undef94, __disjvr_4^0 -> undef112, __disjvr_5^0 -> undef130, __disjvr_6^0 -> undef148, __disjvr_7^0 -> undef166, __disjvr_8^0 -> undef184, __disjvr_9^0 -> undef202, x^0 -> y^0, rest remain the same}> Calling reachability with... Transition: Conditions: y^0 <= 0, x^0 <= y^0, 0 <= x^0, OPEN EXITS: (condsUp: y^0 <= 0) --- Reachability graph --- > Graph without transitions. Calling reachability with... Transition: Conditions: x^0 <= y^0, 0 <= x^0, y^0 <= 0, OPEN EXITS: > Conditions are reachable! Program does NOT terminate