NO Solver Timeout: 4 Global Timeout: 60 No parsing errors! Init Location: 0 Transitions: (1 + x^0), y^0 -> (1 + y^0)}> Fresh variables: Undef variables: Abstraction variables: Exit nodes: Accepting locations: Asserts: Preprocessed LLVMGraph Init Location: 0 Transitions: (1 + x^0), y^0 -> (1 + 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: 1 + x^0, y^0 -> 1 + y^0, rest remain the same}> Variables: x^0, y^0 Graph 2: Transitions: Variables: Precedence: Graph 0 Graph 1 Graph 2 Map Locations to Subgraph: ( 0 , 0 ) ( 1 , 1 ) ( 2 , 2 ) ******************************************************************************************* ******************************** CHECKING ASSERTIONS ******************************** ******************************************************************************************* Proving termination of subgraph 0 Proving termination of subgraph 1 Checking unfeasibility... Time used: 0.001747 Checking conditional termination of SCC {l1}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000383s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000998s Trying to remove transition: 1 + x^0, y^0 -> 1 + y^0, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.004863s Time used: 0.004748 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.001112s Time used: 4.00081 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.004577s Time used: 4.00075 Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 1.003523s Time used: 1.00042 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.009969s Time used: 0.00652 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.011901s Time used: 0.011896 LOG: SAT solveNonLinear - Elapsed time: 0.021870s Cost: 1; Total time: 0.018416 Termination implied by a set of invariant(s): Invariant at l1: x^0 <= 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): 1 + x^0, y^0 -> 1 + 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): 1 + x^0, y^0 -> 1 + y^0, rest remain the same}> Quasi-ranking function: 50000 - 2*x^0 + y^0 New Graphs: Transitions: 1 + x^0, y^0 -> 1 + y^0, rest remain the same}> Variables: x^0, y^0 Checking conditional termination of SCC {l1}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000592s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.002075s Trying to remove transition: 1 + x^0, y^0 -> 1 + y^0, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.006966s Time used: 0.006816 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.000520s Time used: 4.00021 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.020582s Time used: 4.00417 Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 1.003644s Time used: 1.00062 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.011484s Time used: 0.008721 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.018606s Time used: 0.018601 LOG: SAT solveNonLinear - Elapsed time: 0.030089s Cost: 1; Total time: 0.027322 Termination implied by a set of invariant(s): Invariant at l1: x^0 <= 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): 1 + x^0, y^0 -> 1 + 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): 1 + x^0, y^0 -> 1 + y^0, rest remain the same}> Quasi-ranking function: 50000 - x^0 New Graphs: Transitions: 1 + x^0, y^0 -> 1 + y^0, rest remain the same}> Variables: x^0, y^0 Checking conditional termination of SCC {l1}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000664s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.002607s Trying to remove transition: 1 + x^0, y^0 -> 1 + y^0, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.008576s Time used: 0.008419 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.002416s Time used: 4.00213 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.017349s Time used: 4.00611 Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 1.003794s Time used: 1.00052 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.011715s Time used: 0.008965 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.018762s Time used: 0.018756 LOG: SAT solveNonLinear - Elapsed time: 0.030477s Cost: 1; Total time: 0.027721 Termination implied by a set of invariant(s): Invariant at l1: y^0 <= 1 + x^0 [ Invariant Graph ] Strengthening and disabling transitions... LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility Strengthening transition (result): 1 + x^0, y^0 -> 1 + 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): 1 + x^0, y^0 -> 1 + y^0, rest remain the same}> Quasi-ranking function: 50000 + x^0 - 2*y^0 New Graphs: Transitions: 1 + x^0, y^0 -> 1 + y^0, rest remain the same}> Variables: x^0, y^0 Checking conditional termination of SCC {l1}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000833s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.004141s Trying to remove transition: 1 + x^0, y^0 -> 1 + y^0, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.009988s Time used: 0.009824 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 2.756205s Time used: 2.7559 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 1.025680s Time used: 0.995906 Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.971093s Time used: 0.968136 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.012469s Time used: 0.009333 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.022751s Time used: 0.022745 LOG: SAT solveNonLinear - Elapsed time: 0.035220s Cost: 1; Total time: 0.032078 Termination implied by a set of invariant(s): Invariant at l1: y^0 <= 1 + x^0 [ Invariant Graph ] Strengthening and disabling transitions... LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility Strengthening transition (result): 1 + x^0, y^0 -> 1 + 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): 1 + x^0, y^0 -> 1 + y^0, rest remain the same}> Quasi-ranking function: 50000 - y^0 New Graphs: Transitions: 1 + x^0, y^0 -> 1 + y^0, rest remain the same}> Variables: x^0, y^0 Checking conditional termination of SCC {l1}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000922s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.004628s Trying to remove transition: 1 + x^0, y^0 -> 1 + y^0, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.010193s Time used: 0.010023 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.937357s Time used: 0.936777 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 1.002789s Time used: 1.00142 Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.994791s Time used: 0.993242 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.013736s Time used: 0.010638 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.017048s Time used: 0.017043 LOG: SAT solveNonLinear - Elapsed time: 0.030784s Cost: 1; Total time: 0.027681 Termination implied by a set of invariant(s): Invariant at l1: x^0 <= 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): 1 + x^0, y^0 -> 1 + 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): 1 + x^0, y^0 -> 1 + y^0, rest remain the same}> Quasi-ranking function: 50000 - x^0 - y^0 New Graphs: Transitions: 1 + x^0, y^0 -> 1 + y^0, rest remain the same}> Variables: x^0, y^0 Checking conditional termination of SCC {l1}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001006s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.004477s Trying to remove transition: 1 + x^0, y^0 -> 1 + y^0, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.011395s Time used: 0.011214 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.946402s Time used: 0.941001 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.994723s Time used: 0.992616 Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.997618s Time used: 0.996071 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.012648s Time used: 0.009821 Termination failed. Trying to show unreachability... Proving unreachability of entry: LOG: CALL check - Post:1 <= 0 - Process 1 * Exit transition: * Postcondition : 1 <= 0 LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001368s > Postcondition is not implied! LOG: RETURN check - Elapsed time: 0.001449s Cannot prove unreachability Proving non-termination of subgraph 1 Transitions: 1 + x^0, y^0 -> 1 + y^0, rest remain the same}> Variables: x^0, y^0 Checking conditional non-termination of SCC {l1}... > No exit transition to close. Calling reachability with... Transition: Conditions: OPEN EXITS: --- Reachability graph --- > Graph without transitions. Calling reachability with... Transition: Conditions: OPEN EXITS: > Conditions are reachable! Program does NOT terminate