NO Solver Timeout: 4 Global Timeout: 60 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: 0.011908 Checking conditional termination of SCC {l2}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.002725s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.016189s 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: 0.038131s Time used: 0.036493 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.055812s Time used: 0.050749 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.045806s Time used: 0.0458 LOG: SAT solveNonLinear - Elapsed time: 0.101619s Cost: 1; Total time: 0.096549 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: 0.015411s Remaining time after improvement: 0.992488 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: 0.001042s > Postcondition is not implied! LOG: RETURN check - Elapsed time: 0.001106s 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: 0.002209s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.012589s 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: 0.026938s Time used: 0.025206 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.068655s Time used: 0.063314 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.037419s Time used: 0.037413 LOG: SAT solveNonLinear - Elapsed time: 0.106074s Cost: 1; Total time: 0.100727 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: 0.015315s Remaining time after improvement: 0.992444 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: 0.000791s > Postcondition is not implied! LOG: RETURN check - Elapsed time: 0.000861s 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: 0.002299s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.013803s 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: 0.025322s Time used: 0.023524 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.053280s Time used: 0.048181 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.032156s Time used: 0.032149 LOG: SAT solveNonLinear - Elapsed time: 0.085435s Cost: 1; Total time: 0.08033 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: 0.015776s Remaining time after improvement: 0.991475 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: 0.001346s > Postcondition is not implied! LOG: RETURN check - Elapsed time: 0.001426s 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: 0.002383s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.014034s 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: 0.025947s Time used: 0.023983 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.063419s Time used: 0.05797 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.037045s Time used: 0.037039 LOG: SAT solveNonLinear - Elapsed time: 0.100464s Cost: 1; Total time: 0.095009 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: 0.015986s Remaining time after improvement: 0.991979 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: 0.001028s > Postcondition is not implied! LOG: RETURN check - Elapsed time: 0.001107s 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: 0.002326s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.013455s 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: 0.025762s Time used: 0.023839 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.069282s Time used: 0.064348 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.004972s Time used: 4.00004 Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 1.041542s Time used: 1.00015 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.029541s Time used: 0.025745 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: 0.016376s Checking conditional non-termination of SCC {l2}... EXIT TRANSITIONS: Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 1.524006s Time used: 1.52016 Improving Solution with cost 4 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 1.003951s Time used: 1.00393 LOG: SAT solveNonLinear - Elapsed time: 2.527957s Cost: 4; Total time: 2.5241 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: 0.058291s Remaining time after improvement: 0.979205 Minimizing number of undef constraints... LOG: CALL solveNonLinear LOG: RETURN solveNonLinear - Elapsed time: 0.035112s 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: 1.208935s Time used: 1.20514 Improving Solution with cost 2 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 1.004028s Time used: 1.00401 LOG: SAT solveNonLinear - Elapsed time: 2.212963s Cost: 2; Total time: 2.20914 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: 0.059137s Remaining time after improvement: 0.976799 Minimizing number of undef constraints... LOG: CALL solveNonLinear LOG: RETURN solveNonLinear - Elapsed time: 0.035914s 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: 0.924930s Time used: 0.921653 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.388816s Time used: 0.388776 LOG: SAT solveNonLinear - Elapsed time: 1.313746s Cost: 1; Total time: 1.31043 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: 0.061035s Remaining time after improvement: 0.974014 Minimizing number of undef constraints... LOG: CALL solveNonLinear LOG: RETURN solveNonLinear - Elapsed time: 0.036960s 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