NO Solver Timeout: 4 Global Timeout: 60 No parsing errors! Init Location: 0 Transitions: (1 + x^0), y^0 -> (~(1) + y^0)}> 1, y^0 -> 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: 0.001912 Checking conditional termination of SCC {l1}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000639s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001143s 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: 0.004852s Time used: 0.004738 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.001958s Time used: 4.0012 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.006735s Time used: 4.00087 Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 1.005835s Time used: 1.00047 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.010273s Time used: 0.006994 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 1.000860s Time used: 1.00065 LOG: SAT solveNonLinear - Elapsed time: 1.011133s Cost: 1; Total time: 1.00764 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: 0.000483s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001640s 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: 0.007120s Time used: 0.00699 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.001847s Time used: 4.00104 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.005123s Time used: 4.00073 Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 1.007332s Time used: 1.00045 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.011506s Time used: 0.008059 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 1.000968s Time used: 1.00075 LOG: SAT solveNonLinear - Elapsed time: 1.012474s Cost: 1; Total time: 1.00881 Termination implied by a set of invariant(s): Invariant at l1: y^0 <= 1 [ 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: 0.000573s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.002509s 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: 0.006440s Time used: 0.006295 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.001914s Time used: 4.00114 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.028309s Time used: 4.00092 Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 1.007224s Time used: 1.00049 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.013207s Time used: 0.009619 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.795530s Time used: 0.795482 LOG: SAT solveNonLinear - Elapsed time: 0.808737s Cost: 1; Total time: 0.805101 Termination implied by a set of invariant(s): Invariant at l1: y^0 <= 1 [ 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: 0.000696s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.003040s 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: 0.008326s Time used: 0.008168 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.975087s Time used: 0.974783 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 1.000955s Time used: 0.998032 Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.997887s Time used: 0.995243 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.013581s Time used: 0.009839 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.986077s Time used: 0.985937 LOG: SAT solveNonLinear - Elapsed time: 0.999658s Cost: 1; Total time: 0.995776 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: 0.000791s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.003432s 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: 0.009079s Time used: 0.008914 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.974054s Time used: 0.973757 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 1.000423s Time used: 0.997562 Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.998111s Time used: 0.995232 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.016899s Time used: 0.01328 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.982203s Time used: 0.982135 LOG: SAT solveNonLinear - Elapsed time: 0.999102s Cost: 1; Total time: 0.995415 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 - 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: 0.000885s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.003955s 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: 0.009713s Time used: 0.009545 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.971494s Time used: 0.971167 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.999770s Time used: 0.997346 Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.977967s Time used: 0.975287 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 1.002661s Time used: 0.998856 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: 0.004168s > Postcondition is not implied! LOG: RETURN check - Elapsed time: 0.004290s 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