NO Solver Timeout: 4 Global Timeout: 60 No parsing errors! Init Location: 0 Transitions: 0) /\ (arg2 > ~(1)), par{arg1 -> 0, arg2 -> 0, arg3 -> (10 * arg2)}> 1), par{arg2 -> arg3, arg3 -> arg2}> 10), par{arg2 -> arg3, arg3 -> arg2}> 1) /\ (0 = arg3), par{arg1 -> 0, arg2 -> 0, arg3 -> (arg2 - 1)}> 1, arg2 -> 1, arg3 -> 2}> 0, arg2 -> 0, arg3 -> 9}> 1) /\ (1 = arg3), par{arg1 -> 1, arg2 -> 1, arg3 -> (arg2 + 1)}> undef22, arg2 -> undef23, arg3 -> undef24}> Fresh variables: undef22, undef23, undef24, Undef variables: undef22, undef23, undef24, Abstraction variables: Exit nodes: Accepting locations: Asserts: Preprocessed LLVMGraph Init Location: 0 Transitions: 0) /\ (undef23 > ~(1))> 1) /\ (arg1 < 2) /\ (arg3 > 1) /\ (0 = arg2), par{arg1 -> 0, arg2 -> 0, arg3 -> (arg3 - 1)}> 1) /\ (arg1 < 2) /\ (arg3 > 1) /\ (1 = arg2), par{arg1 -> 1, arg2 -> 1, arg3 -> (arg3 + 1)}> 10) /\ (arg1 < 2) /\ (arg3 > 1) /\ (0 = arg2), par{arg1 -> 0, arg2 -> 0, arg3 -> (arg3 - 1)}> 10) /\ (arg1 < 2) /\ (arg3 > 1) /\ (1 = arg2), par{arg1 -> 1, arg2 -> 1, arg3 -> (arg3 + 1)}> 1, arg2 -> 1, arg3 -> 2}> 0, arg2 -> 0, arg3 -> 9}> Fresh variables: undef22, undef23, undef24, Undef variables: undef22, undef23, undef24, Abstraction variables: Exit nodes: Accepting locations: Asserts: ************************************************************* ******************************************************************************************* *********************** WORKING TRANSITION SYSTEM (DAG) *********************** ******************************************************************************************* Init Location: 0 Graph 0: Transitions: Variables: Graph 1: Transitions: 0, arg2 -> 0, arg3 -> -1 + arg3, rest remain the same}> 1, arg2 -> 1, arg3 -> 1 + arg3, rest remain the same}> 0, arg2 -> 0, arg3 -> -1 + arg3, rest remain the same}> 1, arg2 -> 1, arg3 -> 1 + arg3, rest remain the same}> 1, arg2 -> 1, arg3 -> 2, rest remain the same}> 0, arg2 -> 0, arg3 -> 9, rest remain the same}> Variables: arg1, arg2, arg3 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: 0.792862 Checking conditional termination of SCC {l2}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.007698s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.099839s Trying to remove transition: 0, arg2 -> 0, arg3 -> 9, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.002556s Time used: 4.00084 Trying to remove transition: 1, arg2 -> 1, arg3 -> 2, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.031513s Time used: 4.00047 Trying to remove transition: 1, arg2 -> 1, arg3 -> 1 + arg3, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.025564s Time used: 4.00014 Trying to remove transition: 0, arg2 -> 0, arg3 -> -1 + arg3, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.012289s Time used: 4.00079 Trying to remove transition: 1, arg2 -> 1, arg3 -> 1 + arg3, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.026088s Time used: 4.0008 Trying to remove transition: 0, arg2 -> 0, arg3 -> -1 + arg3, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.009501s Time used: 4.0007 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.152469s Time used: 0.135802 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 1.000964s Time used: 1.00091 LOG: SAT solveNonLinear - Elapsed time: 1.153433s Cost: 1; Total time: 1.13671 Failed at location 2: arg3 <= 0 Before Improving: Quasi-invariant at l2: arg3 <= 0 Optimizing invariants... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.011645s Remaining time after improvement: 0.993272 Termination implied by a set of quasi-invariant(s): Quasi-invariant at l2: arg3 <= 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: 0, arg2 -> 0, arg3 -> -1 + arg3, rest remain the same}> LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility It's unfeasible. Removing transition: 1, arg2 -> 1, arg3 -> 1 + arg3, rest remain the same}> LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility It's unfeasible. Removing transition: 0, arg2 -> 0, arg3 -> -1 + arg3, rest remain the same}> LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility It's unfeasible. Removing transition: 1, arg2 -> 1, arg3 -> 1 + arg3, rest remain the same}> LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility It's unfeasible. Removing transition: 1, arg2 -> 1, arg3 -> 2, rest remain the same}> LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility It's unfeasible. Removing transition: 0, arg2 -> 0, arg3 -> 9, 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: 0, arg2 -> 0, arg3 -> -1 + arg3, rest remain the same}> LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility It's unfeasible. Removing transition: 1, arg2 -> 1, arg3 -> 1 + arg3, rest remain the same}> LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility It's unfeasible. Removing transition: 0, arg2 -> 0, arg3 -> -1 + arg3, rest remain the same}> LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility It's unfeasible. Removing transition: 1, arg2 -> 1, arg3 -> 1 + arg3, rest remain the same}> LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility It's unfeasible. Removing transition: 1, arg2 -> 1, arg3 -> 2, rest remain the same}> LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility It's unfeasible. Removing transition: 0, arg2 -> 0, arg3 -> 9, rest remain the same}> New Graphs: Calling Safety with literal arg3 <= 0 and entry LOG: CALL check - Post:arg3 <= 0 - Process 1 * Exit transition: * Postcondition : arg3 <= 0 LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001105s > Postcondition is not implied! LOG: RETURN check - Elapsed time: 0.001215s INVARIANTS: 2: Quasi-INVARIANTS to narrow Graph: 2: arg3 <= 0 , Narrowing transition: 0, arg2 -> 0, arg3 -> -1 + arg3, rest remain the same}> LOG: Narrow transition size 1 Narrowing transition: 1, arg2 -> 1, arg3 -> 1 + arg3, rest remain the same}> LOG: Narrow transition size 1 Narrowing transition: 0, arg2 -> 0, arg3 -> -1 + arg3, rest remain the same}> LOG: Narrow transition size 1 Narrowing transition: 1, arg2 -> 1, arg3 -> 1 + arg3, rest remain the same}> LOG: Narrow transition size 1 Narrowing transition: 1, arg2 -> 1, arg3 -> 2, rest remain the same}> LOG: Narrow transition size 1 Narrowing transition: 0, arg2 -> 0, arg3 -> 9, rest remain the same}> LOG: Narrow transition size 1 invGraph after Narrowing: Transitions: 0, arg2 -> 0, arg3 -> -1 + arg3, rest remain the same}> 1, arg2 -> 1, arg3 -> 1 + arg3, rest remain the same}> 0, arg2 -> 0, arg3 -> -1 + arg3, rest remain the same}> 1, arg2 -> 1, arg3 -> 1 + arg3, rest remain the same}> 1, arg2 -> 1, arg3 -> 2, rest remain the same}> 0, arg2 -> 0, arg3 -> 9, rest remain the same}> Variables: arg1, arg2, arg3 Checking conditional termination of SCC {l2}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.002801s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.097914s Trying to remove transition: 0, arg2 -> 0, arg3 -> 9, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 3.639810s Time used: 3.63815 Trying to remove transition: 1, arg2 -> 1, arg3 -> 2, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 1.021375s Time used: 0.993879 Trying to remove transition: 1, arg2 -> 1, arg3 -> 1 + arg3, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.975151s Time used: 0.968353 Trying to remove transition: 0, arg2 -> 0, arg3 -> -1 + arg3, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.996917s Time used: 0.990302 Trying to remove transition: 1, arg2 -> 1, arg3 -> 1 + arg3, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.998307s Time used: 0.989982 Trying to remove transition: 0, arg2 -> 0, arg3 -> -1 + arg3, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.995179s Time used: 0.988064 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.995990s Time used: 0.988569 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.998005s Time used: 0.98716 Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.984939s Time used: 0.98191 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.997165s Time used: 0.990006 Proving non-termination of subgraph 1 Transitions: 0, arg2 -> 0, arg3 -> -1 + arg3, rest remain the same}> 1, arg2 -> 1, arg3 -> 1 + arg3, rest remain the same}> 0, arg2 -> 0, arg3 -> -1 + arg3, rest remain the same}> 1, arg2 -> 1, arg3 -> 1 + arg3, rest remain the same}> 1, arg2 -> 1, arg3 -> 2, rest remain the same}> 0, arg2 -> 0, arg3 -> 9, rest remain the same}> Variables: arg1, arg2, arg3 Checking conditional non-termination of SCC {l2}... EXIT TRANSITIONS: Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.128161s Time used: 0.127674 Improving Solution with cost 10 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 1.002024s Time used: 1.00197 LOG: SAT solveNonLinear - Elapsed time: 1.130185s Cost: 10; Total time: 1.12964 Non-termination implied by a set of quasi-invariant(s): Quasi-invariant at l2: arg1 <= 1 Strengthening and disabling EXIT transitions... Closed exits from l2: 6 Strengthening exit transition (result): Strengthening exit transition (result): Strengthening exit transition (result): Strengthening exit transition (result): Strengthening exit transition (result): 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): 0, arg2 -> 0, arg3 -> -1 + arg3, rest remain the same}> LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility Strengthening transition (result): 1, arg2 -> 1, arg3 -> 1 + arg3, rest remain the same}> LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility Strengthening transition (result): 0, arg2 -> 0, arg3 -> -1 + arg3, rest remain the same}> LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility Strengthening transition (result): 1, arg2 -> 1, arg3 -> 1 + arg3, rest remain the same}> LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility Strengthening transition (result): 1, arg2 -> 1, arg3 -> 2, rest remain the same}> LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility Strengthening transition (result): 0, arg2 -> 0, arg3 -> 9, 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: 0.082972s Time used: 0.082603 Improving Solution with cost 7 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 1.006109s Time used: 1.00074 LOG: SAT solveNonLinear - Elapsed time: 1.089080s Cost: 7; Total time: 1.08334 Non-termination implied by a set of quasi-invariant(s): Quasi-invariant at l2: 0 <= arg2 Strengthening and disabling EXIT transitions... Closed exits from l2: 2 Strengthening exit transition (result): Strengthening exit transition (result): Strengthening exit transition (result): 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): 0, arg2 -> 0, arg3 -> -1 + arg3, rest remain the same}> LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility Strengthening transition (result): 1, arg2 -> 1, arg3 -> 1 + arg3, rest remain the same}> LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility Strengthening transition (result): 0, arg2 -> 0, arg3 -> -1 + arg3, rest remain the same}> LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility Strengthening transition (result): 1, arg2 -> 1, arg3 -> 1 + arg3, rest remain the same}> LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility Strengthening transition (result): 1, arg2 -> 1, arg3 -> 2, rest remain the same}> LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility Strengthening transition (result): 0, arg2 -> 0, arg3 -> 9, 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: 0.034328s Time used: 0.033862 Improving Solution with cost 4 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 1.001095s Time used: 1.00103 LOG: SAT solveNonLinear - Elapsed time: 1.035423s Cost: 4; Total time: 1.03489 Failed at location 2: 1 <= arg3 Before Improving: Quasi-invariant at l2: 1 <= arg3 Optimizing invariants... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.042126s Remaining time after improvement: 0.996967 Non-termination implied by a set of quasi-invariant(s): Quasi-invariant at l2: 1 <= arg3 Strengthening and disabling EXIT transitions... Closed exits from l2: 2 Strengthening exit transition (result): 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): 0, arg2 -> 0, arg3 -> -1 + arg3, rest remain the same}> LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility Strengthening transition (result): 1, arg2 -> 1, arg3 -> 1 + arg3, rest remain the same}> LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility Strengthening transition (result): 0, arg2 -> 0, arg3 -> -1 + arg3, rest remain the same}> LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility Strengthening transition (result): 1, arg2 -> 1, arg3 -> 1 + arg3, rest remain the same}> LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility Strengthening transition (result): 1, arg2 -> 1, arg3 -> 2, rest remain the same}> LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility Strengthening transition (result): 0, arg2 -> 0, arg3 -> 9, 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: 0.026227s Time used: 0.026122 LOG: SAT solveNonLinear - Elapsed time: 0.026227s Cost: 0; Total time: 0.026122 Non-termination implied by a set of quasi-invariant(s): Quasi-invariant at l2: arg2 <= 1 Strengthening and disabling EXIT transitions... Closed exits from l2: 2 Strengthening and disabling transitions... LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility Strengthening transition (result): 0, arg2 -> 0, arg3 -> -1 + arg3, rest remain the same}> LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility Strengthening transition (result): 1, arg2 -> 1, arg3 -> 1 + arg3, rest remain the same}> LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility Strengthening transition (result): 0, arg2 -> 0, arg3 -> -1 + arg3, rest remain the same}> LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility Strengthening transition (result): 1, arg2 -> 1, arg3 -> 1 + arg3, rest remain the same}> LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility Strengthening transition (result): 1, arg2 -> 1, arg3 -> 2, rest remain the same}> LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility Strengthening transition (result): 0, arg2 -> 0, arg3 -> 9, rest remain the same}> Calling reachability with... Transition: Conditions: arg1 <= 1, 0 <= arg2, 1 <= arg3, arg2 <= 1, OPEN EXITS: --- Reachability graph --- > Graph without transitions. Calling reachability with... Transition: Conditions: 0 <= arg2, 1 <= arg3, arg1 <= 1, arg2 <= 1, OPEN EXITS: > Conditions are reachable! Program does NOT terminate