NO Solver Timeout: 4 Global Timeout: 60 No parsing errors! Init Location: 0 Transitions: (~(1) + x^0), y^0 -> (~(1) + y^0)}> (0 + i^0), y^0 -> (0 + j^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)}> (~(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}> -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 ) ( 2 , 1 ) ( 6 , 2 ) ******************************************************************************************* ******************************** CHECKING ASSERTIONS ******************************** ******************************************************************************************* Proving termination of subgraph 0 Proving termination of subgraph 1 Checking unfeasibility... Time used: 0.003456 Checking conditional termination of SCC {l2}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000889s Ranking function: 1 + 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 {l2}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000429s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001418s 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: 0.005260s Time used: 0.005116 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.010031s Time used: 0.009703 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.016520s Time used: 0.016513 LOG: SAT solveNonLinear - Elapsed time: 0.026551s Cost: 1; Total time: 0.026216 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: 0.002941s Remaining time after improvement: 0.998736 Termination implied by a set of quasi-invariant(s): Quasi-invariant at l2: 0 <= 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}> LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility It's unfeasible. Removing transition: -1 + x^0, y^0 -> -1 + y^0, rest remain the same}> [ Termination Graph ] Strengthening and disabling transitions... > It's unfeasible. Removing transition: -1 + x^0, y^0 -> -1 + y^0, rest remain the same}> New Graphs: Calling Safety with literal 0 <= x^0 and entry LOG: CALL check - Post:0 <= x^0 - Process 1 * Exit transition: * Postcondition : 0 <= x^0 LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000469s > Postcondition is not implied! LOG: RETURN check - Elapsed time: 0.000556s INVARIANTS: 2: Quasi-INVARIANTS to narrow Graph: 2: 0 <= x^0 , It's unfeasible. Removing transition: -1 + x^0, y^0 -> -1 + y^0, rest remain the same}> Narrowing transition: -1 + x^0, y^0 -> -1 + y^0, rest remain the same}> LOG: Narrow transition size 1 invGraph after Narrowing: Transitions: -1 + x^0, y^0 -> -1 + 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: 0.000428s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001444s 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: 0.004943s Time used: 0.004816 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.001447s Time used: 4.00092 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.006377s Time used: 4.00085 Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 1.003389s Time used: 1.00045 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.009324s Time used: 0.006131 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.012732s Time used: 0.012726 LOG: SAT solveNonLinear - Elapsed time: 0.022056s Cost: 1; Total time: 0.018857 Termination implied by a set of invariant(s): 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 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 {l2}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000454s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001539s 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: 0.006463s Time used: 0.006327 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.002839s Time used: 4.00237 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.005477s Time used: 4.00072 Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 1.003558s Time used: 1.00035 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.010862s Time used: 0.007308 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.012267s Time used: 0.012261 LOG: SAT solveNonLinear - Elapsed time: 0.023129s Cost: 1; Total time: 0.019569 Termination implied by a set of invariant(s): 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 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 {l2}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000589s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.002328s 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: 0.006338s Time used: 0.006192 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.001664s Time used: 4.00121 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.006151s Time used: 4.0008 Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 1.003694s Time used: 1.00067 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.010915s Time used: 0.007748 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.016885s Time used: 0.016879 LOG: SAT solveNonLinear - Elapsed time: 0.027800s Cost: 1; Total time: 0.024627 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 {l2}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000667s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.003726s 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: 0.007941s Time used: 0.007779 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 2.769184s Time used: 2.76879 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 1.000104s Time used: 0.994923 Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.994840s Time used: 0.993071 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.020067s Time used: 0.016904 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.016802s Time used: 0.016796 LOG: SAT solveNonLinear - Elapsed time: 0.036870s Cost: 1; Total time: 0.0337 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 {l2}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000740s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.004001s 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: 0.008957s Time used: 0.008788 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.940267s Time used: 0.939967 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 1.002231s Time used: 0.998253 Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.996268s Time used: 0.994418 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.011929s Time used: 0.008791 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.012053s Time used: 0.012047 LOG: SAT solveNonLinear - Elapsed time: 0.023981s Cost: 1; Total time: 0.020838 Quasi-ranking function: 50000 - 2*x^0 + 3*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 {l2}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000838s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.003866s 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: 0.008933s Time used: 0.008765 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.952805s Time used: 0.952504 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 1.000468s Time used: 0.997811 Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.997297s Time used: 0.995628 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.011698s Time used: 0.00861 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 {l2}... EXIT TRANSITIONS: Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.006309s Time used: 0.006141 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.005020s Time used: 0.005015 LOG: SAT solveNonLinear - Elapsed time: 0.011329s Cost: 1; Total time: 0.011156 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: 0.001630s Remaining time after improvement: 0.998885 Non-termination implied by a set of quasi-invariant(s): Quasi-invariant at l2: 1 + x^0 <= 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): -1 + x^0, y^0 -> -1 + y^0, rest remain the same}> Calling reachability with... Transition: Conditions: 1 + x^0 <= 0, OPEN EXITS: --- Reachability graph --- > Graph without transitions. Calling reachability with... Transition: Conditions: 1 + x^0 <= 0, OPEN EXITS: > Conditions are reachable! Program does NOT terminate