NO Solver Timeout: 4 Global Timeout: 60 No parsing errors! Init Location: 0 Transitions: undef3}> (2 + undef7)}> (~(2) + undef12)}> Fresh variables: undef3, undef7, undef12, Undef variables: undef3, undef7, undef12, Abstraction variables: Exit nodes: Accepting locations: Asserts: Preprocessed LLVMGraph Init Location: 0 Transitions: (2 + undef7)}> (~(2) + undef12)}> Fresh variables: undef3, undef7, undef12, Undef variables: undef3, undef7, undef12, Abstraction variables: Exit nodes: Accepting locations: Asserts: ************************************************************* ******************************************************************************************* *********************** WORKING TRANSITION SYSTEM (DAG) *********************** ******************************************************************************************* Init Location: 0 Graph 0: Transitions: Variables: Graph 1: Transitions: 2 + undef7, rest remain the same}> -2 + undef12, rest remain the same}> Variables: x_5^0 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: 0.002502 Checking conditional termination of SCC {l2}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000720s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.002732s Trying to remove transition: -2 + undef12, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.006619s Time used: 0.006431 Trying to remove transition: 2 + undef7, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.005927s Time used: 0.005546 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.009379s Time used: 0.008993 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.036678s Time used: 0.036017 Improving Solution with cost 2 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.141729s Time used: 0.141716 LOG: SAT solveNonLinear - Elapsed time: 0.178407s Cost: 2; Total time: 0.177733 Failed at location 2: 0 <= x_5^0 Failed at location 2: x_5^0 <= 0 Before Improving: Quasi-invariant at l2: 0 <= x_5^0 Quasi-invariant at l2: x_5^0 <= 0 Optimizing invariants... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.012101s Remaining time after improvement: 0.998567 Termination implied by a set of quasi-invariant(s): Quasi-invariant at l2: 0 <= x_5^0 Quasi-invariant at l2: x_5^0 <= 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: 2 + undef7, rest remain the same}> LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility It's unfeasible. Removing transition: -2 + undef12, 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: 2 + undef7, rest remain the same}> LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility It's unfeasible. Removing transition: -2 + undef12, rest remain the same}> New Graphs: Calling Safety with literal 0 <= x_5^0 and entry LOG: CALL check - Post:0 <= x_5^0 - Process 1 * Exit transition: * Postcondition : 0 <= x_5^0 LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000451s > Postcondition is not implied! LOG: RETURN check - Elapsed time: 0.000516s Calling Safety with literal x_5^0 <= 0 and entry LOG: CALL check - Post:x_5^0 <= 0 - Process 2 * Exit transition: * Postcondition : x_5^0 <= 0 LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000354s > Postcondition is not implied! LOG: RETURN check - Elapsed time: 0.000410s INVARIANTS: 2: Quasi-INVARIANTS to narrow Graph: 2: x_5^0 <= 0 , 0 <= x_5^0 , Narrowing transition: 2 + undef7, rest remain the same}> LOG: Narrow transition size 2 Narrowing transition: -2 + undef12, rest remain the same}> LOG: Narrow transition size 2 invGraph after Narrowing: Transitions: 2 + undef7, rest remain the same}> -2 + undef12, rest remain the same}> Variables: x_5^0 Checking conditional termination of SCC {l2}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000679s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.002757s Trying to remove transition: -2 + undef12, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.005756s Time used: 0.005592 Trying to remove transition: 2 + undef7, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.005931s Time used: 0.005509 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.009422s Time used: 0.008991 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.001424s Time used: 4.00065 Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 1.012732s Time used: 1.00057 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.016284s Time used: 0.009103 Proving non-termination of subgraph 1 Transitions: 2 + undef7, rest remain the same}> -2 + undef12, rest remain the same}> Variables: x_5^0 Checking conditional non-termination of SCC {l2}... EXIT TRANSITIONS: Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.012923s Time used: 0.012745 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.017670s Time used: 0.017662 LOG: SAT solveNonLinear - Elapsed time: 0.030593s Cost: 1; Total time: 0.030407 Failed at location 2: 1 + x_5^0 <= 0 Before Improving: Quasi-invariant at l2: 1 + x_5^0 <= 0 Optimizing invariants... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.005582s Remaining time after improvement: 0.998791 Minimizing number of undef constraints... LOG: CALL solveNonLinear LOG: RETURN solveNonLinear - Elapsed time: 0.002287s Number of undef constraints reduced! Non-termination implied by a set of quasi-invariant(s): Quasi-invariant at l2: 1 + x_5^0 <= 0 Constraint over undef 'undef12 <= 0' in transition: -2 + undef12, rest remain the same}> 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 It's unfeasible. Removing transition: 2 + undef7, rest remain the same}> LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility Strengthening transition (result): -2 + undef12, rest remain the same}> Calling reachability with... Transition: Conditions: 1 + x_5^0 <= 0, OPEN EXITS: --- Reachability graph --- > Graph without transitions. Calling reachability with... Transition: Conditions: 1 + x_5^0 <= 0, OPEN EXITS: > Conditions are reachable! Program does NOT terminate