NO Solver Timeout: 4 Global Timeout: 300 No parsing errors! Init Location: 0 Transitions: undef9, y_6^0 -> undef10}> undef11, lt_10^0 -> undef15, lt_9^0 -> undef17}> undef27, lt_9^0 -> undef29, tmp_7^0 -> undef30}> undef49, lt_9^0 -> undef51, tmp_7^0 -> undef52}> undef58}> undef72}> Fresh variables: undef9, undef10, undef11, undef15, undef17, undef21, undef22, undef27, undef29, undef30, undef33, undef34, undef49, undef51, undef52, undef55, undef56, undef58, undef72, undef77, Undef variables: undef9, undef10, undef11, undef15, undef17, undef21, undef22, undef27, undef29, undef30, undef33, undef34, undef49, undef51, undef52, undef55, undef56, undef58, undef72, undef77, Abstraction variables: Exit nodes: Accepting locations: Asserts: Preprocessed LLVMGraph Init Location: 0 Transitions: undef58}> Fresh variables: undef9, undef10, undef11, undef15, undef17, undef21, undef22, undef27, undef29, undef30, undef33, undef34, undef49, undef51, undef52, undef55, undef56, undef58, undef72, undef77, Undef variables: undef9, undef10, undef11, undef15, undef17, undef21, undef22, undef27, undef29, undef30, undef33, undef34, undef49, undef51, undef52, undef55, undef56, undef58, undef72, undef77, Abstraction variables: Exit nodes: Accepting locations: Asserts: ************************************************************* ******************************************************************************************* *********************** WORKING TRANSITION SYSTEM (DAG) *********************** ******************************************************************************************* Init Location: 0 Graph 0: Transitions: Variables: Graph 1: Transitions: undef58, rest remain the same}> Variables: cnt_16^0, cnt_21^0, __disjvr_0^0 Graph 2: Transitions: Variables: Precedence: Graph 0 Graph 1 Graph 2 Map Locations to Subgraph: ( 0 , 0 ) ( 2 , 1 ) ( 3 , 2 ) ******************************************************************************************* ******************************** CHECKING ASSERTIONS ******************************** ******************************************************************************************* Proving termination of subgraph 0 Proving termination of subgraph 1 Checking unfeasibility... Time used: 0.003081 Checking conditional termination of SCC {l2}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000685s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.002062s Trying to remove transition: undef58, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.005012s Time used: 0.004875 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.006621s Time used: 0.00617 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.011497s Time used: 0.011494 LOG: SAT solveNonLinear - Elapsed time: 0.018118s Cost: 1; Total time: 0.017664 Failed at location 2: cnt_21^0 <= cnt_16^0 Before Improving: Quasi-invariant at l2: cnt_21^0 <= cnt_16^0 Optimizing invariants... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.002292s Remaining time after improvement: 0.999067 Termination implied by a set of quasi-invariant(s): Quasi-invariant at l2: cnt_21^0 <= cnt_16^0 [ 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: LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility It's unfeasible. Removing transition: undef58, rest remain the same}> [ Termination Graph ] Strengthening and disabling transitions... > It's unfeasible. Removing transition: undef58, rest remain the same}> LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility It's unfeasible. Removing transition: New Graphs: Calling Safety with literal cnt_21^0 <= cnt_16^0 and entry LOG: CALL check - Post:cnt_21^0 <= cnt_16^0 - Process 1 * Exit transition: * Postcondition : cnt_21^0 <= cnt_16^0 LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000227s > Postcondition is not implied! LOG: RETURN check - Elapsed time: 0.000254s INVARIANTS: 2: Quasi-INVARIANTS to narrow Graph: 2: cnt_21^0 <= cnt_16^0 , Narrowing transition: LOG: Narrow transition size 1 Narrowing transition: undef58, rest remain the same}> LOG: Narrow transition size 1 invGraph after Narrowing: Transitions: undef58, rest remain the same}> Variables: cnt_16^0, cnt_21^0, __disjvr_0^0 Checking conditional termination of SCC {l2}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000391s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001605s Trying to remove transition: undef58, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.003966s Time used: 0.003816 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.007630s Time used: 0.007251 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.000881s Time used: 4.00038 Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 1.003305s Time used: 1.00019 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.013343s Time used: 0.00537 Proving non-termination of subgraph 1 Transitions: undef58, rest remain the same}> Variables: cnt_16^0, cnt_21^0, __disjvr_0^0 Checking that every undef value has an assignment... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001520s Checking conditional non-termination of SCC {l2}... EXIT TRANSITIONS: Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.036254s Time used: 0.035829 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.031220s Time used: 0.031216 LOG: SAT solveNonLinear - Elapsed time: 0.067473s Cost: 1; Total time: 0.067045 Failed at location 2: 1 + cnt_16^0 <= cnt_21^0 Before Improving: Quasi-invariant at l2: 1 + cnt_16^0 <= cnt_21^0 Optimizing invariants... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.003974s Remaining time after improvement: 0.998037 Minimizing number of undef constraints... LOG: CALL solveNonLinear LOG: RETURN solveNonLinear - Elapsed time: 0.004059s Number of undef constraints reduced! Non-termination implied by a set of quasi-invariant(s): Quasi-invariant at l2: 1 + cnt_16^0 <= cnt_21^0 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): LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility Strengthening transition (result): undef58, rest remain the same}> Calling reachability with... Transition: Conditions: 1 + cnt_16^0 <= cnt_21^0, OPEN EXITS: (condsUp: 1 + cnt_16^0 <= cnt_21^0) --- Reachability graph --- > Graph without transitions. Calling reachability with... Transition: Conditions: 1 + cnt_16^0 <= cnt_21^0, OPEN EXITS: > Conditions are reachable! Program does NOT terminate