NO Solver Timeout: 4 Global Timeout: 300 No parsing errors! Init Location: 0 Transitions: (1 + (~(1) * x^0))}> Fresh variables: Undef variables: Abstraction variables: Exit nodes: Accepting locations: Asserts: Preprocessed LLVMGraph Init Location: 0 Transitions: (1 + (~(1) * x^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, rest remain the same}> Variables: x^0 Precedence: Graph 0 Graph 1 Map Locations to Subgraph: ( 0 , 0 ) ( 1 , 1 ) ******************************************************************************************* ******************************** CHECKING ASSERTIONS ******************************** ******************************************************************************************* Proving termination of subgraph 0 Proving termination of subgraph 1 Checking unfeasibility... Time used: 0.001347 Checking conditional termination of SCC {l1}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000488s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001396s Trying to remove transition: 1 - x^0, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.002840s Time used: 0.002703 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.002689s Time used: 0.002512 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.006444s Time used: 0.006442 LOG: SAT solveNonLinear - Elapsed time: 0.009133s Cost: 1; Total time: 0.008954 Failed at location 1: 1 + x^0 <= 0 Before Improving: Quasi-invariant at l1: 1 + x^0 <= 0 Optimizing invariants... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000776s Remaining time after improvement: 0.999645 Termination implied by a set of quasi-invariant(s): Quasi-invariant at l1: 1 + x^0 <= 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: 1 - x^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^0, rest remain the same}> New Graphs: Calling Safety with literal 1 + x^0 <= 0 and entry LOG: CALL check - Post:1 + x^0 <= 0 - Process 1 * Exit transition: * Postcondition : 1 + x^0 <= 0 LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000136s > Postcondition is not implied! LOG: RETURN check - Elapsed time: 0.000159s INVARIANTS: 1: Quasi-INVARIANTS to narrow Graph: 1: 1 + x^0 <= 0 , Narrowing transition: 1 - x^0, rest remain the same}> LOG: Narrow transition size 1 invGraph after Narrowing: Transitions: 1 - x^0, rest remain the same}> Variables: x^0 Checking conditional termination of SCC {l1}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000223s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000674s Trying to remove transition: 1 - x^0, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.001527s Time used: 0.001457 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.004119s Time used: 0.00398 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.003447s Time used: 0.003446 LOG: SAT solveNonLinear - Elapsed time: 0.007566s Cost: 1; Total time: 0.007426 Failed at location 1: 2 <= x^0 Before Improving: Quasi-invariant at l1: 2 <= x^0 Optimizing invariants... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000787s Remaining time after improvement: 0.999624 Termination implied by a set of quasi-invariant(s): Quasi-invariant at l1: 2 <= x^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: 1 - x^0, rest remain the same}> [ Termination Graph ] Strengthening and disabling transitions... > It's unfeasible. Removing transition: 1 - x^0, rest remain the same}> New Graphs: Calling Safety with literal 2 <= x^0 and entry LOG: CALL check - Post:2 <= x^0 - Process 2 * Exit transition: * Postcondition : 2 <= x^0 LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000155s > Postcondition is not implied! LOG: RETURN check - Elapsed time: 0.000182s INVARIANTS: 1: Quasi-INVARIANTS to narrow Graph: 1: 2 <= x^0 , Narrowing transition: 1 - x^0, rest remain the same}> LOG: Narrow transition size 1 invGraph after Narrowing: Transitions: 1 - x^0, rest remain the same}> Variables: x^0 Checking conditional termination of SCC {l1}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000222s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000671s Trying to remove transition: 1 - x^0, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.001513s Time used: 0.001445 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.001872s Time used: 0.00178 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.006877s Time used: 0.006777 Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.023078s Time used: 0.022848 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.002147s Time used: 0.001594 Proving non-termination of subgraph 1 Transitions: 1 - x^0, rest remain the same}> Variables: x^0 Checking conditional non-termination of SCC {l1}... EXIT TRANSITIONS: Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.001809s Time used: 0.00172 Improving Solution with cost 2 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.002727s Time used: 0.002726 LOG: SAT solveNonLinear - Elapsed time: 0.004536s Cost: 2; Total time: 0.004446 Failed at location 1: x^0 <= 1 Before Improving: Quasi-invariant at l1: x^0 <= 1 Optimizing invariants... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000652s Remaining time after improvement: 0.999628 Non-termination implied by a set of quasi-invariant(s): Quasi-invariant at l1: x^0 <= 1 Strengthening and disabling EXIT transitions... Closed exits from l1: 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): 1 - x^0, rest remain the same}> Checking conditional non-termination of SCC {l1}... EXIT TRANSITIONS: Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.001402s Time used: 0.001323 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.001700s Time used: 0.001698 LOG: SAT solveNonLinear - Elapsed time: 0.003101s Cost: 1; Total time: 0.003021 Failed at location 1: 0 <= x^0 Before Improving: Quasi-invariant at l1: 0 <= x^0 Optimizing invariants... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000539s Remaining time after improvement: 0.999666 Non-termination implied by a set of quasi-invariant(s): Quasi-invariant at l1: 0 <= x^0 Strengthening and disabling EXIT transitions... Closed exits from l1: 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, rest remain the same}> Calling reachability with... Transition: Conditions: x^0 <= 1, 0 <= x^0, OPEN EXITS: --- Reachability graph --- > Graph without transitions. Calling reachability with... Transition: Conditions: 0 <= x^0, x^0 <= 1, OPEN EXITS: > Conditions are reachable! Program does NOT terminate