NO Solver Timeout: 4 Global Timeout: 60 No parsing errors! Init Location: 0 Transitions: undef1}> (~(1) + x_5^0)}> (~(1) + x_5^0)}> Fresh variables: undef1, Undef variables: undef1, Abstraction variables: Exit nodes: Accepting locations: Asserts: Preprocessed LLVMGraph Init Location: 0 Transitions: (~(1) + x_5^0)}> (~(1) + x_5^0)}> (~(1) + x_5^0)}> Fresh variables: undef1, Undef variables: undef1, Abstraction variables: Exit nodes: Accepting locations: Asserts: ************************************************************* ******************************************************************************************* *********************** WORKING TRANSITION SYSTEM (DAG) *********************** ******************************************************************************************* Init Location: 0 Graph 0: Transitions: Variables: Graph 1: Transitions: -1 + x_5^0, rest remain the same}> -1 + x_5^0, rest remain the same}> Variables: x_5^0, y_6^0 Graph 2: Transitions: Variables: Precedence: Graph 0 Graph 1 Graph 2 -1 + x_5^0, rest remain the same}> Map Locations to Subgraph: ( 0 , 0 ) ( 2 , 2 ) ( 3 , 1 ) ******************************************************************************************* ******************************** CHECKING ASSERTIONS ******************************** ******************************************************************************************* Proving termination of subgraph 0 Proving termination of subgraph 1 Checking unfeasibility... Time used: 0.003213 Checking conditional termination of SCC {l3}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000822s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.003722s Trying to remove transition: -1 + x_5^0, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.007112s Time used: 0.006922 Trying to remove transition: -1 + x_5^0, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.007720s Time used: 0.007269 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.013993s Time used: 0.013419 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.037767s Time used: 0.037759 LOG: SAT solveNonLinear - Elapsed time: 0.051761s Cost: 1; Total time: 0.051178 Failed at location 3: y_6^0 <= 1 Before Improving: Quasi-invariant at l3: y_6^0 <= 1 Optimizing invariants... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.005227s Quasi-invariant improved LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001907s Quasi-invariant improved LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001873s Quasi-invariant improved LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001870s Quasi-invariant improved LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001857s Quasi-invariant improved LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001867s Quasi-invariant improved LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001857s Quasi-invariant improved LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001853s Quasi-invariant improved LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001856s Quasi-invariant improved LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001849s Quasi-invariant improved LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001858s Quasi-invariant improved LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001866s Quasi-invariant improved LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001861s Quasi-invariant improved LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001855s Quasi-invariant improved LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001419s Remaining time after improvement: 0.974868 Termination implied by a set of quasi-invariant(s): Quasi-invariant at l3: y_6^0 <= 15 [ 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: -1 + x_5^0, rest remain the same}> LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility Strengthening transition (result): -1 + x_5^0, 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: -1 + x_5^0, rest remain the same}> LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility Strengthening transition (result): -1 + x_5^0, rest remain the same}> New Graphs: Transitions: -1 + x_5^0, rest remain the same}> Variables: x_5^0, y_6^0 Checking conditional termination of SCC {l3}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000411s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001402s Trying to remove transition: -1 + x_5^0, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.004053s Time used: 0.003928 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.003639s Time used: 4.00303 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.007536s Time used: 4.00089 Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 1.003370s Time used: 1.00038 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.009786s Time used: 0.006428 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.011650s Time used: 0.011644 LOG: SAT solveNonLinear - Elapsed time: 0.021436s Cost: 1; Total time: 0.018072 Quasi-ranking function: 50000 + x_5^0 New Graphs: Transitions: -1 + x_5^0, rest remain the same}> Variables: x_5^0, y_6^0 Checking conditional termination of SCC {l3}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000542s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001976s Trying to remove transition: -1 + x_5^0, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.005004s Time used: 0.004856 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.001932s Time used: 4.00135 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.005360s Time used: 4.0007 Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 1.002977s Time used: 1.00039 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.009627s Time used: 0.006467 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.013632s Time used: 0.013627 LOG: SAT solveNonLinear - Elapsed time: 0.023259s Cost: 1; Total time: 0.020094 Quasi-ranking function: 50000 + x_5^0 - y_6^0 New Graphs: Transitions: -1 + x_5^0, rest remain the same}> Variables: x_5^0, y_6^0 Checking conditional termination of SCC {l3}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000649s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.002420s Trying to remove transition: -1 + x_5^0, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.006452s Time used: 0.006297 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.002485s Time used: 4.00174 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.005675s Time used: 4.0008 Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 1.003759s Time used: 1.00056 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.010704s Time used: 0.007607 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.012990s Time used: 0.012985 LOG: SAT solveNonLinear - Elapsed time: 0.023695s Cost: 1; Total time: 0.020592 Quasi-ranking function: 50000 + x_5^0 + y_6^0 New Graphs: Transitions: -1 + x_5^0, rest remain the same}> Variables: x_5^0, y_6^0 Checking conditional termination of SCC {l3}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000736s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.002802s Trying to remove transition: -1 + x_5^0, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.007210s Time used: 0.007037 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 2.710401s Time used: 2.70997 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.998855s Time used: 0.994373 Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.995332s Time used: 0.993692 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.009775s Time used: 0.006935 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: 0.001322s > Postcondition is not implied! LOG: RETURN check - Elapsed time: 0.001397s Cannot prove unreachability Proving non-termination of subgraph 1 Transitions: -1 + x_5^0, rest remain the same}> -1 + x_5^0, rest remain the same}> Variables: x_5^0, y_6^0 Checking conditional non-termination of SCC {l3}... EXIT TRANSITIONS: Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.009970s Time used: 0.009774 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.022142s Time used: 0.022136 LOG: SAT solveNonLinear - Elapsed time: 0.032112s Cost: 0; Total time: 0.03191 Non-termination implied by a set of quasi-invariant(s): Quasi-invariant at l3: x_5^0 <= 19 Strengthening and disabling EXIT transitions... Closed exits from l3: 1 Strengthening and disabling transitions... LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility Strengthening transition (result): -1 + x_5^0, rest remain the same}> LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility Strengthening transition (result): -1 + x_5^0, rest remain the same}> Calling reachability with... Transition: Conditions: x_5^0 <= 19, OPEN EXITS: --- Reachability graph --- > Graph without transitions. Calling reachability with... Transition: Conditions: x_5^0 <= 19, OPEN EXITS: > Conditions are reachable! Program does NOT terminate