NO Solver Timeout: 4 Global Timeout: 300 No parsing errors! Init Location: 0 Transitions: ((0 + x^0) + (~(1) * y^0))}> Fresh variables: Undef variables: Abstraction variables: Exit nodes: Accepting locations: Asserts: Preprocessed LLVMGraph Init Location: 0 Transitions: ((0 + x^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: x^0 - y^0, rest remain the same}> Variables: x^0, y^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: 0.000898 Checking conditional termination of SCC {l1}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000287s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000913s Trying to remove transition: x^0 - y^0, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.002886s Time used: 0.002806 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.003209s Time used: 0.003037 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.004812s Time used: 0.00481 LOG: SAT solveNonLinear - Elapsed time: 0.008021s Cost: 1; Total time: 0.007847 Failed at location 1: x^0 <= 0 Before Improving: Quasi-invariant at l1: x^0 <= 0 Optimizing invariants... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000900s Remaining time after improvement: 0.999595 Termination implied by a set of quasi-invariant(s): Quasi-invariant at l1: 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: x^0 - y^0, rest remain the same}> [ Termination Graph ] Strengthening and disabling transitions... > It's unfeasible. Removing transition: x^0 - y^0, rest remain the same}> New Graphs: Calling Safety with literal x^0 <= 0 and entry LOG: CALL check - Post:x^0 <= 0 - Process 1 * Exit transition: * Postcondition : x^0 <= 0 LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000149s > Postcondition is not implied! LOG: RETURN check - Elapsed time: 0.000172s INVARIANTS: 1: Quasi-INVARIANTS to narrow Graph: 1: x^0 <= 0 , Narrowing transition: x^0 - y^0, rest remain the same}> LOG: Narrow transition size 1 invGraph after Narrowing: Transitions: x^0 - y^0, rest remain the same}> Variables: x^0, y^0 Checking conditional termination of SCC {l1}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000250s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000851s Trying to remove transition: x^0 - y^0, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.002635s Time used: 0.002562 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.003298s Time used: 0.003118 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.006687s Time used: 0.006685 LOG: SAT solveNonLinear - Elapsed time: 0.009984s Cost: 1; Total time: 0.009803 Failed at location 1: x^0 <= 1 + y^0 Before Improving: Quasi-invariant at l1: x^0 <= 1 + y^0 Optimizing invariants... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000893s Remaining time after improvement: 0.999577 Termination implied by a set of quasi-invariant(s): Quasi-invariant at l1: x^0 <= 1 + y^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: x^0 - 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 It's unfeasible. Removing transition: x^0 - y^0, rest remain the same}> New Graphs: Calling Safety with literal x^0 <= 1 + y^0 and entry LOG: CALL check - Post:x^0 <= 1 + y^0 - Process 2 * Exit transition: * Postcondition : x^0 <= 1 + y^0 LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000178s > Postcondition is not implied! LOG: RETURN check - Elapsed time: 0.000208s INVARIANTS: 1: Quasi-INVARIANTS to narrow Graph: 1: x^0 <= 1 + y^0 , Narrowing transition: x^0 - y^0, rest remain the same}> LOG: Narrow transition size 1 invGraph after Narrowing: Transitions: x^0 - y^0, rest remain the same}> Variables: x^0, y^0 Checking conditional termination of SCC {l1}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000285s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001003s Trying to remove transition: x^0 - y^0, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.002587s Time used: 0.002512 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.004504s Time used: 0.004327 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.008107s Time used: 0.008106 LOG: SAT solveNonLinear - Elapsed time: 0.012611s Cost: 1; Total time: 0.012433 Failed at location 1: 1 <= y^0 Before Improving: Quasi-invariant at l1: 1 <= y^0 Optimizing invariants... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001160s Quasi-invariant improved LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000579s Remaining time after improvement: 0.998836 Termination implied by a set of quasi-invariant(s): Quasi-invariant at l1: 0 <= y^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: x^0 - 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 It's unfeasible. Removing transition: x^0 - y^0, rest remain the same}> New Graphs: Calling Safety with literal 0 <= y^0 and entry LOG: CALL check - Post:0 <= y^0 - Process 3 * Exit transition: * Postcondition : 0 <= y^0 LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000191s > Postcondition is not implied! LOG: RETURN check - Elapsed time: 0.000222s INVARIANTS: 1: Quasi-INVARIANTS to narrow Graph: 1: 0 <= y^0 , Narrowing transition: x^0 - y^0, rest remain the same}> LOG: Narrow transition size 1 invGraph after Narrowing: Transitions: x^0 - y^0, rest remain the same}> Variables: x^0, y^0 Checking conditional termination of SCC {l1}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000290s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001003s Trying to remove transition: x^0 - y^0, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.002586s Time used: 0.00251 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.001996s Time used: 4.00147 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.004455s Time used: 4.00061 Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 1.013073s Time used: 1.00035 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.005628s Time used: 0.003805 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.007597s Time used: 0.007595 LOG: SAT solveNonLinear - Elapsed time: 0.013225s Cost: 1; Total time: 0.0114 Termination implied by a set of invariant(s): Invariant at l1: 1 + y^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): x^0 - 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): x^0 - y^0, rest remain the same}> Quasi-ranking function: 50000 - x^0 New Graphs: Transitions: x^0 - y^0, rest remain the same}> Variables: x^0, y^0 Checking conditional termination of SCC {l1}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000326s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001322s Trying to remove transition: x^0 - y^0, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.003224s Time used: 0.003143 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.001758s Time used: 4.00159 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.004487s Time used: 4.00086 Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 1.017650s Time used: 1.00045 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.006191s Time used: 0.004131 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.007474s Time used: 0.007472 LOG: SAT solveNonLinear - Elapsed time: 0.013665s Cost: 1; Total time: 0.011603 Termination implied by a set of invariant(s): Invariant at l1: 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): x^0 - 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): x^0 - y^0, rest remain the same}> Quasi-ranking function: 50000 - x^0 + y^0 New Graphs: Transitions: x^0 - y^0, rest remain the same}> Variables: x^0, y^0 Checking conditional termination of SCC {l1}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000321s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001157s Trying to remove transition: x^0 - y^0, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.003169s Time used: 0.003085 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.004297s Time used: 4.00411 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.004467s Time used: 4.00094 Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 1.018053s Time used: 1.00064 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.006499s Time used: 0.004696 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.009205s Time used: 0.009203 LOG: SAT solveNonLinear - Elapsed time: 0.015704s Cost: 1; Total time: 0.013899 Termination implied by a set of invariant(s): Invariant at l1: y^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): x^0 - 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): x^0 - y^0, rest remain the same}> Quasi-ranking function: 50000 - x^0 - y^0 New Graphs: Transitions: x^0 - y^0, rest remain the same}> Variables: x^0, y^0 Checking conditional termination of SCC {l1}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000362s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001457s Trying to remove transition: x^0 - y^0, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.004110s Time used: 0.004021 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.002399s Time used: 4.00221 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.005063s Time used: 4.00106 Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 1.018198s Time used: 1.0007 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.007058s Time used: 0.004881 Proving non-termination of subgraph 1 Transitions: x^0 - y^0, rest remain the same}> Variables: x^0, y^0 Checking conditional non-termination of SCC {l1}... EXIT TRANSITIONS: Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.005206s Time used: 0.005097 Improving Solution with cost 3 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.005710s Time used: 0.005708 LOG: SAT solveNonLinear - Elapsed time: 0.010916s Cost: 3; Total time: 0.010805 Failed at location 1: 1 + y^0 <= 0 Before Improving: Quasi-invariant at l1: 1 + y^0 <= 0 Optimizing invariants... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001164s Remaining time after improvement: 0.999356 Non-termination implied by a set of quasi-invariant(s): Quasi-invariant at l1: 1 + y^0 <= 0 Strengthening and disabling EXIT transitions... Closed exits from l1: 2 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): x^0 - y^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: 0.002245s Time used: 0.00215 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.002476s Time used: 0.002474 LOG: SAT solveNonLinear - Elapsed time: 0.004721s Cost: 1; Total time: 0.004624 Failed at location 1: 1 <= x^0 Before Improving: Quasi-invariant at l1: 1 <= x^0 Optimizing invariants... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000778s Remaining time after improvement: 0.999585 Non-termination implied by a set of quasi-invariant(s): Quasi-invariant at l1: 1 <= 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): x^0 - y^0, rest remain the same}> Calling reachability with... Transition: Conditions: 1 + y^0 <= 0, 1 <= x^0, OPEN EXITS: (condsUp: 1 + y^0 <= 0) --- Reachability graph --- > Graph without transitions. Calling reachability with... Transition: Conditions: 1 <= x^0, 1 + y^0 <= 0, OPEN EXITS: > Conditions are reachable! Program does NOT terminate