NO Solver Timeout: 4 Global Timeout: 60 No parsing errors! Init Location: 0 Transitions: arg2) /\ (arg2 > ~(1)) /\ (arg1 > 0), par{arg1 -> (arg2 + 5)}> 0) /\ (arg2 > 0), par{arg1 -> arg2, arg2 -> arg1}> undef5, arg2 -> undef6}> Fresh variables: undef5, undef6, Undef variables: undef5, undef6, Abstraction variables: Exit nodes: Accepting locations: Asserts: Preprocessed LLVMGraph Init Location: 0 Transitions: undef6) /\ (undef6 > ~(1)) /\ (undef5 > 0)> 0) /\ (arg2 > 0), par{arg1 -> arg2, arg2 -> arg1}> Fresh variables: undef5, undef6, Undef variables: undef5, undef6, Abstraction variables: Exit nodes: Accepting locations: Asserts: ************************************************************* ******************************************************************************************* *********************** WORKING TRANSITION SYSTEM (DAG) *********************** ******************************************************************************************* Init Location: 0 Graph 0: Transitions: Variables: Graph 1: Transitions: arg2, arg2 -> arg1, rest remain the same}> Variables: arg1, arg2 Precedence: Graph 0 Graph 1 Map Locations to Subgraph: ( 0 , 0 ) ( 2 , 1 ) ******************************************************************************************* ******************************** CHECKING ASSERTIONS ******************************** ******************************************************************************************* Proving termination of subgraph 0 Proving termination of subgraph 1 Checking unfeasibility... Time used: 0.002683 Checking conditional termination of SCC {l2}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000616s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001904s Trying to remove transition: arg2, arg2 -> arg1, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.006043s Time used: 0.00588 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.008377s Time used: 0.008061 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.018549s Time used: 0.018545 LOG: SAT solveNonLinear - Elapsed time: 0.026926s Cost: 1; Total time: 0.026606 Failed at location 2: arg2 <= 0 Before Improving: Quasi-invariant at l2: arg2 <= 0 Optimizing invariants... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.002040s Remaining time after improvement: 0.999019 Termination implied by a set of quasi-invariant(s): Quasi-invariant at l2: arg2 <= 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: arg2, arg2 -> arg1, rest remain the same}> [ Termination Graph ] Strengthening and disabling transitions... > It's unfeasible. Removing transition: arg2, arg2 -> arg1, rest remain the same}> New Graphs: Calling Safety with literal arg2 <= 0 and entry LOG: CALL check - Post:arg2 <= 0 - Process 1 * Exit transition: * Postcondition : arg2 <= 0 LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000570s > Postcondition is not implied! LOG: RETURN check - Elapsed time: 0.000673s INVARIANTS: 2: Quasi-INVARIANTS to narrow Graph: 2: arg2 <= 0 , Narrowing transition: arg2, arg2 -> arg1, rest remain the same}> LOG: Narrow transition size 1 invGraph after Narrowing: Transitions: arg2, arg2 -> arg1, rest remain the same}> Variables: arg1, arg2 Checking conditional termination of SCC {l2}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000546s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001820s Trying to remove transition: arg2, arg2 -> arg1, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.005551s Time used: 0.005408 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.011392s Time used: 0.011107 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.000920s Time used: 4.00042 Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 1.003184s Time used: 1.00003 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.014054s Time used: 0.008055 Proving non-termination of subgraph 1 Transitions: arg2, arg2 -> arg1, rest remain the same}> Variables: arg1, arg2 Checking conditional non-termination of SCC {l2}... EXIT TRANSITIONS: Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.005633s Time used: 0.005446 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.006192s Time used: 0.006188 LOG: SAT solveNonLinear - Elapsed time: 0.011825s Cost: 1; Total time: 0.011634 Non-termination implied by a set of quasi-invariant(s): Quasi-invariant at l2: 1 <= arg1 Strengthening and disabling EXIT transitions... Closed exits from l2: 1 Strengthening exit transition (result): Strengthening and disabling transitions... LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility Strengthening transition (result): arg2, arg2 -> arg1, rest remain the same}> Checking conditional non-termination of SCC {l2}... EXIT TRANSITIONS: Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.004241s Time used: 0.004052 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.005892s Time used: 0.005885 LOG: SAT solveNonLinear - Elapsed time: 0.010133s Cost: 1; Total time: 0.009937 Failed at location 2: 1 <= arg2 Before Improving: Quasi-invariant at l2: 1 <= arg2 Optimizing invariants... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001275s Remaining time after improvement: 0.999274 Non-termination implied by a set of quasi-invariant(s): Quasi-invariant at l2: 1 <= arg2 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): arg2, arg2 -> arg1, rest remain the same}> Calling reachability with... Transition: Conditions: 1 <= arg1, 1 <= arg2, OPEN EXITS: --- Reachability graph --- > Graph without transitions. Calling reachability with... Transition: Conditions: 1 <= arg1, 1 <= arg2, OPEN EXITS: > Conditions are reachable! Program does NOT terminate