MAYBE 2019-05-11 07:09:00,596 INFO [UltimateCore.java:185]: Initializing application 2019-05-11 07:09:00,599 INFO [UltimateCore.java:202]: -------------------------------------------------------------------------------- 2019-05-11 07:09:00,602 INFO [PluginFactory.java:62]: -------------------------------------------------------------------------------- 2019-05-11 07:09:00,603 INFO [PluginFactory.java:63]: Detecting plugins... 2019-05-11 07:09:00,603 INFO [PluginFactory.java:287]: 1 IController plugins available 2019-05-11 07:09:00,604 INFO [PluginFactory.java:287]: 4 ISource plugins available 2019-05-11 07:09:00,604 INFO [PluginFactory.java:287]: 1 IOutput plugins available 2019-05-11 07:09:00,604 INFO [PluginFactory.java:287]: 10 IGenerator plugins available 2019-05-11 07:09:00,605 INFO [PluginFactory.java:287]: 5 IAnalysis plugins available 2019-05-11 07:09:00,607 INFO [PluginFactory.java:241]: Loaded controller UltimateCore 2019-05-11 07:09:00,608 INFO [PluginFactory.java:70]: Finished detecting plugins! 2019-05-11 07:09:00,608 INFO [PluginFactory.java:71]: Loading services ... 2019-05-11 07:09:00,608 INFO [PluginFactory.java:272]: 0 IServiceFactory services available 2019-05-11 07:09:00,608 INFO [PluginFactory.java:73]: Finished loading services! 2019-05-11 07:09:00,609 INFO [PluginFactory.java:74]: -------------------------------------------------------------------------------- 2019-05-11 07:09:00,610 INFO [SettingsManager.java:46]: Loading settings from ./../termcomp2015.epf 2019-05-11 07:09:04,264 INFO [SettingsManager.java:54]: Loading preferences was successful 2019-05-11 07:09:04,264 INFO [SettingsManager.java:55]: Preferences different from defaults: 2019-05-11 07:09:04,282 INFO [PluginFactory.java:178]: -------------------------------------------------------------------------------- 2019-05-11 07:09:04,282 INFO [PluginFactory.java:179]: Loading all admissible plugins (creating one instance, loading preferences) 2019-05-11 07:09:04,631 INFO [PluginFactory.java:196]: Finished loading 20 admissible plugins (all were admissible) 2019-05-11 07:09:04,632 INFO [PluginFactory.java:198]: -------------------------------------------------------------------------------- 2019-05-11 07:09:04,632 INFO [SettingsManager.java:61]: Preferences of LassoRanker differ from their defaults: 2019-05-11 07:09:04,632 INFO [SettingsManager.java:63]: * Only non-decreasing invariants=true 2019-05-11 07:09:04,633 INFO [SettingsManager.java:63]: * Termination analysis=LINEAR_WITH_GUESSES 2019-05-11 07:09:04,633 INFO [SettingsManager.java:63]: * SMT solver command=z3 -smt2 -in SMTLIB2_COMPLIANT=true 2019-05-11 07:09:04,633 INFO [SettingsManager.java:63]: * Nontermination analysis=LINEAR_WITH_GUESSES 2019-05-11 07:09:04,633 INFO [SettingsManager.java:61]: Preferences of BlockEncoding differ from their defaults: 2019-05-11 07:09:04,634 INFO [SettingsManager.java:63]: * Rating-Boundary (empty for LBE)=0 2019-05-11 07:09:04,634 INFO [SettingsManager.java:63]: * Strategy for the edge rating=DISJUNCTIVE_RATING 2019-05-11 07:09:04,634 INFO [SettingsManager.java:61]: Preferences of BuchiAutomizer differ from their defaults: 2019-05-11 07:09:04,634 INFO [SettingsManager.java:63]: * Lasso Analysis=Linear_with_guesses 2019-05-11 07:09:04,635 INFO [SettingsManager.java:63]: * Use external solver (rank synthesis)=false 2019-05-11 07:09:04,635 INFO [SettingsManager.java:63]: * Buchi interpolant automaton=StagedBlast 2019-05-11 07:09:04,635 INFO [SettingsManager.java:63]: * Construct termination proof for TermComp=true 2019-05-11 07:09:04,635 INFO [SettingsManager.java:61]: Preferences of CACSL2BoogieTranslator differ from their defaults: 2019-05-11 07:09:04,636 INFO [SettingsManager.java:63]: * Check unreachability of error function in SV-COMP mode=false 2019-05-11 07:09:04,636 INFO [SettingsManager.java:63]: * Size of pointer (in bytes)=8 2019-05-11 07:09:04,636 INFO [SettingsManager.java:63]: * Check if freed pointer was valid=false 2019-05-11 07:09:04,636 INFO [SettingsManager.java:63]: * How to treat unsigned ints differently from normal ones=IGNORE 2019-05-11 07:09:04,636 INFO [SettingsManager.java:61]: Preferences of CodeCheck differ from their defaults: 2019-05-11 07:09:04,637 INFO [SettingsManager.java:63]: * Timeout in seconds=100000 2019-05-11 07:09:04,637 INFO [SettingsManager.java:63]: * The redirection strategy for Impulse=RANDOmSTRONGEST 2019-05-11 07:09:04,637 INFO [SettingsManager.java:61]: Preferences of RCFGBuilder differ from their defaults: 2019-05-11 07:09:04,637 INFO [SettingsManager.java:63]: * Size of a code block=SequenceOfStatements 2019-05-11 07:09:04,637 INFO [SettingsManager.java:63]: * Convert code blocks to CNF=false 2019-05-11 07:09:04,637 INFO [SettingsManager.java:63]: * To the following directory=/home/matthias/ultimate/dump 2019-05-11 07:09:04,638 INFO [SettingsManager.java:63]: * Command for external solver=./../z3/z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 2019-05-11 07:09:04,638 INFO [SettingsManager.java:61]: Preferences of TraceAbstraction differ from their defaults: 2019-05-11 07:09:04,638 INFO [SettingsManager.java:63]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true 2019-05-11 07:09:04,638 INFO [SettingsManager.java:61]: Preferences of UltimateCore differ from their defaults: 2019-05-11 07:09:04,639 INFO [SettingsManager.java:63]: * Log level for plugins=warn 2019-05-11 07:09:04,639 INFO [SettingsManager.java:61]: Preferences of UltimateCore differ from their defaults: 2019-05-11 07:09:04,639 INFO [SettingsManager.java:63]: * Log level for plugins=warn 2019-05-11 07:09:04,639 INFO [UltimateCore.java:76]: Initializing controller ... 2019-05-11 07:09:04,855 INFO [PersistenceAwareModelManager.java:56]: Repository-Root is: /tmp 2019-05-11 07:09:04,865 INFO [ToolchainManager.java:402]: [Toolchain 1]: Parser CDTParser is usable for /export/starexec/sandbox2/benchmark/theBenchmark.c 2019-05-11 07:09:04,866 INFO [ToolchainManager.java:214]: [Toolchain 1]: Parser(s) successfully initiated... 2019-05-11 07:09:04,868 INFO [ToolchainManager.java:187]: [Toolchain 1]: Toolchain data selected. 2019-05-11 07:09:04,869 INFO [PluginConnector.java:252]: Initializing CDTParser... 2019-05-11 07:09:04,870 INFO [PluginConnector.java:257]: CDTParser initialized 2019-05-11 07:09:04,870 INFO [ToolchainManager.java:355]: [Toolchain 1]: Parsing single file: /export/starexec/sandbox2/benchmark/theBenchmark.c 2019-05-11 07:09:04,992 INFO [ToolchainManager.java:238]: ####################### [Toolchain 1] ####################### 2019-05-11 07:09:04,993 INFO [ToolchainWalker.java:61]: Walking toolchain with 6 elements. 2019-05-11 07:09:04,994 INFO [PluginConnector.java:90]: ------------------------CACSL2BoogieTranslator---------------------------- 2019-05-11 07:09:04,994 INFO [PluginConnector.java:252]: Initializing CACSL2BoogieTranslator... 2019-05-11 07:09:04,998 INFO [PluginConnector.java:257]: CACSL2BoogieTranslator initialized 2019-05-11 07:09:04,998 INFO [PluginConnector.java:162]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.05 07:09:04" (1/1) ... 2019-05-11 07:09:05,104 INFO [PluginConnector.java:110]: ------------------------ END CACSL2BoogieTranslator---------------------------- 2019-05-11 07:09:05,105 INFO [PluginConnector.java:90]: ------------------------Boogie Preprocessor---------------------------- 2019-05-11 07:09:05,105 INFO [PluginConnector.java:252]: Initializing Boogie Preprocessor... 2019-05-11 07:09:05,105 INFO [PluginConnector.java:257]: Boogie Preprocessor initialized 2019-05-11 07:09:05,121 INFO [PluginConnector.java:162]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.05 07:09:05" (1/1) ... 2019-05-11 07:09:05,125 INFO [PluginConnector.java:162]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.05 07:09:05" (1/1) ... 2019-05-11 07:09:05,125 INFO [PluginConnector.java:162]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.05 07:09:05" (1/1) ... 2019-05-11 07:09:05,127 INFO [PluginConnector.java:162]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.05 07:09:05" (1/1) ... 2019-05-11 07:09:05,128 INFO [PluginConnector.java:162]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.05 07:09:05" (1/1) ... 2019-05-11 07:09:05,129 INFO [PluginConnector.java:162]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.05 07:09:05" (1/1) ... 2019-05-11 07:09:05,130 INFO [PluginConnector.java:110]: ------------------------ END Boogie Preprocessor---------------------------- 2019-05-11 07:09:05,130 INFO [PluginConnector.java:90]: ------------------------RCFGBuilder---------------------------- 2019-05-11 07:09:05,130 INFO [PluginConnector.java:252]: Initializing RCFGBuilder... 2019-05-11 07:09:05,130 INFO [PluginConnector.java:257]: RCFGBuilder initialized 2019-05-11 07:09:05,132 INFO [PluginConnector.java:162]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.05 07:09:05" (1/1) ... 2019-05-11 07:09:05,226 INFO [MonitoredProcess.java:173]: Starting monitored process 1 with ./../z3/z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) 2019-05-11 07:09:05,229 INFO [MonitoredProcess.java:275]: Waiting until toolchain timeout for monitored process 1 with ./../z3/z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 2019-05-11 07:09:05,337 INFO [PluginConnector.java:110]: ------------------------ END RCFGBuilder---------------------------- 2019-05-11 07:09:05,337 INFO [PluginConnector.java:90]: ------------------------BlockEncoding---------------------------- 2019-05-11 07:09:05,338 INFO [PluginConnector.java:252]: Initializing BlockEncoding... 2019-05-11 07:09:05,339 INFO [PluginConnector.java:257]: BlockEncoding initialized 2019-05-11 07:09:05,339 INFO [PluginConnector.java:162]: Executing the observer BlockEncodingObserver from plugin BlockEncoding for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.05 07:09:05" (1/1) ... 2019-05-11 07:09:05,352 INFO [PluginConnector.java:162]: Executing the observer MinModelConversionObserver from plugin BlockEncoding for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.05 07:09:05" (1/1) ... 2019-05-11 07:09:05,376 WARN [TransFormula.java:607]: CodeBlock already infeasible 2019-05-11 07:09:05,377 WARN [TransFormula.java:607]: CodeBlock already infeasible 2019-05-11 07:09:05,378 INFO [PluginConnector.java:110]: ------------------------ END BlockEncoding---------------------------- 2019-05-11 07:09:05,378 INFO [PluginConnector.java:90]: ------------------------TraceAbstraction---------------------------- 2019-05-11 07:09:05,378 INFO [PluginConnector.java:252]: Initializing TraceAbstraction... 2019-05-11 07:09:05,381 INFO [PluginConnector.java:257]: TraceAbstraction initialized 2019-05-11 07:09:05,381 INFO [PluginConnector.java:162]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "BlockEncodedModel CFG 11.05 07:09:05" (1/5) ... 2019-05-11 07:09:05,382 INFO [PluginConnector.java:162]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.05 07:09:04" (2/5) ... 2019-05-11 07:09:05,383 INFO [PluginConnector.java:162]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.blockencoding CFG 11.05 07:09:05" (3/5) ... 2019-05-11 07:09:05,383 INFO [PluginConnector.java:162]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.05 07:09:05" (4/5) ... 2019-05-11 07:09:05,383 INFO [PluginConnector.java:162]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.05 07:09:05" (5/5) ... Automizer settings: Hoare:true NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION 2019-05-11 07:09:05,475 INFO [PluginConnector.java:110]: ------------------------ END TraceAbstraction---------------------------- 2019-05-11 07:09:05,475 INFO [PluginConnector.java:90]: ------------------------BuchiAutomizer---------------------------- 2019-05-11 07:09:05,475 INFO [PluginConnector.java:252]: Initializing BuchiAutomizer... 2019-05-11 07:09:05,476 INFO [PluginConnector.java:257]: BuchiAutomizer initialized 2019-05-11 07:09:05,478 INFO [PluginConnector.java:162]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.05 07:09:05" (1/1) ... 2019-05-11 07:09:06,012 WARN [TerminationArgumentSynthesizer.java:327]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. 2019-05-11 07:09:06,046 WARN [TerminationArgumentSynthesizer.java:327]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. 2019-05-11 07:09:06,088 WARN [TerminationArgumentSynthesizer.java:327]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. 2019-05-11 07:09:06,129 WARN [TerminationArgumentSynthesizer.java:327]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. 2019-05-11 07:09:06,161 WARN [TerminationArgumentSynthesizer.java:327]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. 2019-05-11 07:09:06,494 WARN [TerminationArgumentSynthesizer.java:327]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. 2019-05-11 07:09:06,508 WARN [TerminationArgumentSynthesizer.java:327]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. 2019-05-11 07:09:06,529 WARN [TerminationArgumentSynthesizer.java:327]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. 2019-05-11 07:09:06,570 WARN [TerminationArgumentSynthesizer.java:327]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. 2019-05-11 07:09:06,606 WARN [TerminationArgumentSynthesizer.java:327]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. 2019-05-11 07:09:06,683 INFO [PluginConnector.java:110]: ------------------------ END BuchiAutomizer---------------------------- 2019-05-11 07:09:06,684 INFO [Benchmark.java:150]: Toolchain (without parser) took 1691.41 ms. Allocated memory is still 643.3 MB. Free memory was 606.8 MB in the beginning and 361.9 MB in the end (delta: 244.9 MB). Peak memory consumption was 244.9 MB. Max. memory is 53.1 GB 2019-05-11 07:09:06,686 INFO [Benchmark.java:150]: CDTParser took 110.86 ms. Allocated memory is still 643.3 MB. Free memory was 614.9 MB in the beginning and 608.2 MB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 53.1 GB 2019-05-11 07:09:06,687 INFO [Benchmark.java:150]: CACSL2BoogieTranslator took 109.94 ms. Allocated memory is still 643.3 MB. Free memory was 606.8 MB in the beginning and 600.2 MB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 53.1 GB 2019-05-11 07:09:06,688 INFO [Benchmark.java:150]: Boogie Preprocessor took 25.31 ms. Allocated memory is still 643.3 MB. Free memory was 600.2 MB in the beginning and 598.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 53.1 GB 2019-05-11 07:09:06,688 INFO [Benchmark.java:150]: RCFGBuilder took 207.10 ms. Allocated memory is still 643.3 MB. Free memory was 598.8 MB in the beginning and 584.5 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 53.1 GB 2019-05-11 07:09:06,689 INFO [Benchmark.java:150]: BlockEncoding took 40.65 ms. Allocated memory is still 643.3 MB. Free memory was 584.5 MB in the beginning and 581.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 53.1 GB 2019-05-11 07:09:06,690 INFO [Benchmark.java:150]: TraceAbstraction took 96.74 ms. Allocated memory is still 643.3 MB. Free memory was 581.9 MB in the beginning and 576.5 MB in the end (delta: 5.3 MB). Peak memory consumption was 5.3 MB. Max. memory is 53.1 GB 2019-05-11 07:09:06,690 INFO [Benchmark.java:150]: BuchiAutomizer took 1207.60 ms. Allocated memory is still 643.3 MB. Free memory was 576.5 MB in the beginning and 361.9 MB in the end (delta: 214.6 MB). Peak memory consumption was 214.6 MB. Max. memory is 53.1 GB 2019-05-11 07:09:06,697 INFO [ResultNotifier.java:119]: RESULT: Ultimate could not prove your program: Toolchain returned no Result. RESULT: Ultimate could not prove your program: Toolchain returned no Result. 2019-05-11 07:09:06,697 INFO [ToolchainManager.java:286]: ####################### End [Toolchain 1] ####################### 2019-05-11 07:09:06,697 INFO [BasicToolchainJob.java:73]: --- Results --- 2019-05-11 07:09:06,698 INFO [BasicToolchainJob.java:75]: * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: 2019-05-11 07:09:06,698 INFO [BasicToolchainJob.java:89]: - AllSpecificationsHoldResult: All specifications hold 2019-05-11 07:09:06,698 INFO [BasicToolchainJob.java:95]: We were not able to verify any specifiation because the program does not contain any specification. 2019-05-11 07:09:06,698 INFO [BasicToolchainJob.java:89]: - ProcedureContractResult [Line: 5]: Procedure Contract for main 2019-05-11 07:09:06,698 INFO [BasicToolchainJob.java:95]: Derived contract for procedure main: 1 2019-05-11 07:09:06,698 INFO [BasicToolchainJob.java:89]: - InvariantResult [Line: 11]: Loop Invariant 2019-05-11 07:09:06,699 INFO [BasicToolchainJob.java:95]: Derived loop invariant: 1 2019-05-11 07:09:06,699 INFO [BasicToolchainJob.java:89]: - BenchmarkResult: Ultimate Automizer benchmark data 2019-05-11 07:09:06,699 INFO [BasicToolchainJob.java:95]: CFG has 10 locations, 0 error locations. Automizer needed 0.0s and 0 iterations. Automata difference (including EdgeChecker) took 0.0s. Computation of Hoare annotation took 0.0s. Minimization removed 0 states and took 0.0s. Biggest automaton had 10 states and ocurred in iteration 0. InterpolantCoveringCapability: 0/0 ICC %: NaN EdgeCheckerBenchmarkData: No data available TraceCheckerBenchmark: No data available InterpolantConsolidationBenchmark: No data available 2019-05-11 07:09:06,699 INFO [BasicToolchainJob.java:75]: * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer: 2019-05-11 07:09:06,699 INFO [BasicToolchainJob.java:89]: - BenchmarkResult: Constructed decomposition of program 2019-05-11 07:09:06,699 INFO [BasicToolchainJob.java:95]: Trivial decomposition into one module whose termination is unknown. 2019-05-11 07:09:06,699 INFO [BasicToolchainJob.java:89]: - BenchmarkResult: Constructed termination proof in form of nested word automata 2019-05-11 07:09:06,699 INFO [BasicToolchainJob.java:95]: Unable to prove termination 2019-05-11 07:09:06,699 INFO [BasicToolchainJob.java:89]: - BenchmarkResult: Timing statistics 2019-05-11 07:09:06,701 INFO [BasicToolchainJob.java:95]: BüchiAutomizer plugin needed 1.1s and 1 iterations. Analysis of lassos took 1.1s. Construction of modules took 0.0s. Büchi inclusion checks took 0.0s. Highest rank in rank-based complementation 0. Minimization removed 0 states and took 0.0s. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had -1 states and ocurred in iteration -1. Nontrivial modules had stage [0, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 EdgeCheckerBenchmarkData: No data available LassoAnalysisResults: nont0 unkn1 SFLI0 SFLT0 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Termination: inital20 mio100 ax100 hnf100 lsp100 arr100 mio100 lsp100 div100 bol100 ite100 ukn100 eq178 hnf91 smp100 dnf100 smp100 tf103 neg100 sie100 Nontermination: inital20 mio100 ax100 hnf100 lsp100 arr100 mio100 lsp100 div100 bol100 ite100 ukn100 eq178 hnf91 smp100 dnf100 smp100 tf103 neg100 sie100 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 3 Time: 72ms VariablesStem: 2 VariablesLoop: 4 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 6 MotzkinApplications: 18 2019-05-11 07:09:06,701 INFO [BasicToolchainJob.java:89]: - TerminationAnalysisResult: Unable to decide termination 2019-05-11 07:09:06,701 INFO [BasicToolchainJob.java:95]: Buchi Automizer is unable to decide termination for the following lasso. Stem: "call ULTIMATE.init();"< "assume true;" >"return;" "call #t~ret0 := main();"< "havoc ~a~1;havoc ~b~1;~a~1 := 1;~b~1 := 2;" "assume true;assume !!(~a~1 + ~b~1 < 5);~a~1 := ~a~1 - ~b~1;~b~1 := ~a~1 + ~b~1;~a~1 := ~b~1 - ~a~1;" Loop: "assume true;assume !!(~a~1 + ~b~1 < 5);~a~1 := ~a~1 - ~b~1;~b~1 := ~a~1 + ~b~1;~a~1 := ~b~1 - ~a~1;" 2019-05-11 07:09:06,701 INFO [BasicToolchainJob.java:75]: * Results from UltimateCore: 2019-05-11 07:09:06,701 INFO [BasicToolchainJob.java:89]: - BenchmarkResult: Toolchain Benchmarks 2019-05-11 07:09:06,707 INFO [BasicToolchainJob.java:95]: Benchmark results are: * CDTParser took 110.86 ms. Allocated memory is still 643.3 MB. Free memory was 614.9 MB in the beginning and 608.2 MB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 53.1 GB * CACSL2BoogieTranslator took 109.94 ms. Allocated memory is still 643.3 MB. Free memory was 606.8 MB in the beginning and 600.2 MB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 53.1 GB * Boogie Preprocessor took 25.31 ms. Allocated memory is still 643.3 MB. Free memory was 600.2 MB in the beginning and 598.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 53.1 GB * RCFGBuilder took 207.10 ms. Allocated memory is still 643.3 MB. Free memory was 598.8 MB in the beginning and 584.5 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 53.1 GB * BlockEncoding took 40.65 ms. Allocated memory is still 643.3 MB. Free memory was 584.5 MB in the beginning and 581.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 53.1 GB * TraceAbstraction took 96.74 ms. Allocated memory is still 643.3 MB. Free memory was 581.9 MB in the beginning and 576.5 MB in the end (delta: 5.3 MB). Peak memory consumption was 5.3 MB. Max. memory is 53.1 GB * BuchiAutomizer took 1207.60 ms. Allocated memory is still 643.3 MB. Free memory was 576.5 MB in the beginning and 361.9 MB in the end (delta: 214.6 MB). Peak memory consumption was 214.6 MB. Max. memory is 53.1 GB 2019-05-11 07:09:06,734 INFO [UltimateCore.java:84]: Preparing to exit Ultimate with return code 0 Closed successfully