NO Solver Timeout: 4 Global Timeout: 300 No parsing errors! Init Location: 0 Transitions: ((0 + x^0) + y^0)}> Fresh variables: Undef variables: Abstraction variables: Exit nodes: Accepting locations: Asserts: Preprocessed LLVMGraph Init Location: 0 Transitions: ((0 + x^0) + y^0)}> ((0 + x^0) + y^0)}> Fresh variables: Undef variables: Abstraction variables: Exit nodes: Accepting locations: Asserts: ************************************************************* ******************************************************************************************* *********************** WORKING TRANSITION SYSTEM (DAG) *********************** ******************************************************************************************* Init Location: 0 Graph 0: Transitions: Variables: Graph 1: Transitions: x^0 + y^0, rest remain the same}> x^0 + y^0, rest remain the same}> Variables: 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: 0.001556 Checking conditional termination of SCC {l2}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000478s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.002856s Trying to remove transition: x^0 + y^0, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.004510s Time used: 0.004376 Trying to remove transition: x^0 + y^0, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.004746s Time used: 0.00446 LOG: SAT solveNonLinear - Elapsed time: 0.004746s Cost: 0; Total time: 0.00446 Termination implied by a set of quasi-invariant(s): Quasi-invariant at l2: 1 + y^0 <= 0 Ranking function: x^0 Ranking function and negation of Quasi-Invariant applied New Graphs: Transitions: x^0 + y^0, rest remain the same}> Variables: x^0, y^0 Checking conditional termination of SCC {l2}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000245s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000837s Trying to remove transition: x^0 + y^0, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.002456s Time used: 0.00238 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.003754s Time used: 0.003579 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.008560s Time used: 0.008559 LOG: SAT solveNonLinear - Elapsed time: 0.012314s Cost: 1; Total time: 0.012138 Failed at location 2: x^0 <= 0 Before Improving: Quasi-invariant at l2: x^0 <= 0 Optimizing invariants... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001303s Remaining time after improvement: 0.999488 Termination implied by a set of quasi-invariant(s): Quasi-invariant at l2: 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: x^0 + y^0, rest remain the same}> LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility It's unfeasible. Removing transition: x^0 + y^0, rest remain the same}> [ Termination Graph ] Strengthening and disabling transitions... > It's unfeasible. Removing transition: x^0 + y^0, rest remain the same}> New Graphs: Calling Safety with literal x^0 <= 0 and entry LOG: CALL check - Post:x^0 <= 0 - Process 1 * Exit transition: * Postcondition : x^0 <= 0 LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000175s > Postcondition is not implied! LOG: RETURN check - Elapsed time: 0.000198s INVARIANTS: 2: Quasi-INVARIANTS to narrow Graph: 2: x^0 <= 0 , Narrowing transition: x^0 + y^0, rest remain the same}> LOG: Narrow transition size 1 Narrowing transition: x^0 + y^0, rest remain the same}> LOG: Narrow transition size 1 invGraph after Narrowing: Transitions: x^0 + y^0, rest remain the same}> x^0 + y^0, rest remain the same}> Variables: x^0, y^0 Checking conditional termination of SCC {l2}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000402s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.002701s Trying to remove transition: x^0 + y^0, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.003910s Time used: 0.003814 Trying to remove transition: x^0 + y^0, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.004614s Time used: 0.004347 LOG: SAT solveNonLinear - Elapsed time: 0.004614s Cost: 0; Total time: 0.004347 Termination implied by a set of quasi-invariant(s): Quasi-invariant at l2: 1 + y^0 <= 0 Ranking function: x^0 Ranking function and negation of Quasi-Invariant applied New Graphs: Transitions: x^0 + y^0, rest remain the same}> Variables: x^0, y^0 Checking conditional termination of SCC {l2}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000247s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000847s Trying to remove transition: x^0 + y^0, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.002458s Time used: 0.002385 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.004188s Time used: 0.003985 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.008314s Time used: 0.008312 LOG: SAT solveNonLinear - Elapsed time: 0.012502s Cost: 1; Total time: 0.012297 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: 0.001251s Remaining time after improvement: 0.999497 Termination implied by a set of quasi-invariant(s): Quasi-invariant at l2: 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): x^0 + y^0, rest remain the same}> LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility It's unfeasible. Removing transition: 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: x^0 + y^0, rest remain the same}> New Graphs: Calling Safety with literal y^0 <= 0 and entry LOG: CALL check - Post:y^0 <= 0 - Process 2 * Exit transition: * Postcondition : y^0 <= 0 LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000159s > Postcondition is not implied! LOG: RETURN check - Elapsed time: 0.000185s INVARIANTS: 2: Quasi-INVARIANTS to narrow Graph: 2: y^0 <= 0 , It's unfeasible. Removing transition: x^0 + y^0, rest remain the same}> Narrowing transition: x^0 + y^0, rest remain the same}> LOG: Narrow transition size 1 invGraph after Narrowing: Transitions: x^0 + y^0, rest remain the same}> Variables: x^0, y^0 Checking conditional termination of SCC {l2}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000252s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000857s Trying to remove transition: x^0 + y^0, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.002447s Time used: 0.002374 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.002500s Time used: 4.00232 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.004286s Time used: 4.00066 Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 1.013073s Time used: 1.00039 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.005222s Time used: 0.003395 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.007259s Time used: 0.007257 LOG: SAT solveNonLinear - Elapsed time: 0.012480s Cost: 1; Total time: 0.010652 Termination implied by a set of invariant(s): Invariant at l2: 0 <= 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): 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): x^0 + y^0, rest remain the same}> Quasi-ranking function: 50000 - x^0 + y^0 New Graphs: Transitions: x^0 + y^0, rest remain the same}> Variables: x^0, y^0 Checking conditional termination of SCC {l2}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000318s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001205s Trying to remove transition: x^0 + y^0, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.003471s Time used: 0.003389 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.001686s Time used: 4.00152 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.004436s Time used: 4.00071 Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 1.013333s Time used: 1.00055 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.006172s Time used: 0.004282 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.008861s Time used: 0.008859 LOG: SAT solveNonLinear - Elapsed time: 0.015033s Cost: 1; Total time: 0.013141 Termination implied by a set of invariant(s): Invariant at l2: 0 <= 1 + x^0 + 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): 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): x^0 + y^0, rest remain the same}> Quasi-ranking function: 50000 - x^0 New Graphs: Transitions: x^0 + y^0, rest remain the same}> Variables: x^0, y^0 Checking conditional termination of SCC {l2}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000354s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001633s Trying to remove transition: x^0 + y^0, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.003708s Time used: 0.003618 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.002248s Time used: 4.00207 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.004913s Time used: 4.00113 Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 1.019442s Time used: 1.00072 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.007050s Time used: 0.00543 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.008665s Time used: 0.008663 LOG: SAT solveNonLinear - Elapsed time: 0.015715s Cost: 1; Total time: 0.014093 Termination implied by a set of invariant(s): 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): 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): x^0 + y^0, rest remain the same}> Quasi-ranking function: 50000 - x^0 - y^0 New Graphs: Transitions: x^0 + y^0, rest remain the same}> Variables: x^0, y^0 Checking conditional termination of SCC {l2}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000367s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001478s Trying to remove transition: x^0 + y^0, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.003850s Time used: 0.003763 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.002223s Time used: 4.00204 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.004971s Time used: 4.00128 Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 1.003627s Time used: 1.00078 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.006326s Time used: 0.004395 Proving non-termination of subgraph 1 Transitions: x^0 + y^0, rest remain the same}> Variables: x^0, y^0 Checking conditional non-termination of SCC {l2}... EXIT TRANSITIONS: Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.003383s Time used: 0.003283 Improving Solution with cost 2 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.003685s Time used: 0.003683 LOG: SAT solveNonLinear - Elapsed time: 0.007068s Cost: 2; Total time: 0.006966 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: 0.000897s Remaining time after improvement: 0.999601 Non-termination implied by a set of quasi-invariant(s): Quasi-invariant at l2: 1 <= x^0 Strengthening and disabling EXIT transitions... Closed exits from l2: 1 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): 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: 0.002272s Time used: 0.002179 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.002433s Time used: 0.002432 LOG: SAT solveNonLinear - Elapsed time: 0.004705s Cost: 1; Total time: 0.004611 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: 0.000702s Remaining time after improvement: 0.999641 Non-termination implied by a set of quasi-invariant(s): Quasi-invariant at l2: 1 <= y^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): x^0 + y^0, rest remain the same}> Calling reachability with... Transition: Conditions: 1 <= x^0, 1 <= y^0, OPEN EXITS: (condsUp: 1 <= y^0) --- Reachability graph --- > Graph without transitions. Calling reachability with... Transition: Conditions: 1 <= x^0, 1 <= y^0, OPEN EXITS: > Conditions are reachable! Program does NOT terminate