./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-83.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-83.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 975c15972d2e28638994433ae48be96fd627b5ee7b57bfcfea19e46a5c8b87bf --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:04:08,302 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:04:08,452 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 23:04:08,463 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:04:08,464 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:04:08,507 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:04:08,508 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:04:08,509 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:04:08,510 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:04:08,516 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:04:08,517 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:04:08,517 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:04:08,518 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:04:08,520 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:04:08,520 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 23:04:08,521 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:04:08,521 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:04:08,522 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:04:08,522 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:04:08,522 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 23:04:08,523 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:04:08,524 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 23:04:08,524 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:04:08,524 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 23:04:08,525 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:04:08,526 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:04:08,526 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:04:08,527 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:04:08,527 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:04:08,528 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:04:08,529 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:04:08,530 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 23:04:08,530 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:04:08,530 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:04:08,530 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:04:08,531 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 23:04:08,531 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:04:08,531 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:04:08,531 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:04:08,532 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 975c15972d2e28638994433ae48be96fd627b5ee7b57bfcfea19e46a5c8b87bf [2023-11-06 23:04:08,846 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:04:08,869 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:04:08,872 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:04:08,873 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:04:08,874 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:04:08,876 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-83.i [2023-11-06 23:04:12,122 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:04:12,510 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:04:12,511 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-83.i [2023-11-06 23:04:12,526 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/data/40034f6b5/ebdfd3682d384fd18ff44a729b37d86f/FLAG99a8481f2 [2023-11-06 23:04:12,541 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/data/40034f6b5/ebdfd3682d384fd18ff44a729b37d86f [2023-11-06 23:04:12,544 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:04:12,545 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:04:12,552 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:04:12,553 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:04:12,562 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:04:12,563 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:04:12" (1/1) ... [2023-11-06 23:04:12,565 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7091d79b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:12, skipping insertion in model container [2023-11-06 23:04:12,565 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:04:12" (1/1) ... [2023-11-06 23:04:12,624 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:04:12,815 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-83.i[916,929] [2023-11-06 23:04:13,057 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:04:13,081 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:04:13,098 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-83.i[916,929] [2023-11-06 23:04:13,314 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:04:13,356 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:04:13,357 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:13 WrapperNode [2023-11-06 23:04:13,357 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:04:13,359 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:04:13,366 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:04:13,366 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:04:13,376 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:13" (1/1) ... [2023-11-06 23:04:13,416 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:13" (1/1) ... [2023-11-06 23:04:13,530 INFO L138 Inliner]: procedures = 26, calls = 118, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 1002 [2023-11-06 23:04:13,530 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:04:13,531 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:04:13,531 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:04:13,531 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:04:13,544 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:13" (1/1) ... [2023-11-06 23:04:13,545 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:13" (1/1) ... [2023-11-06 23:04:13,587 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:13" (1/1) ... [2023-11-06 23:04:13,587 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:13" (1/1) ... [2023-11-06 23:04:13,664 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:13" (1/1) ... [2023-11-06 23:04:13,677 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:13" (1/1) ... [2023-11-06 23:04:13,704 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:13" (1/1) ... [2023-11-06 23:04:13,726 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:13" (1/1) ... [2023-11-06 23:04:13,752 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:04:13,755 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:04:13,755 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:04:13,755 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:04:13,756 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:13" (1/1) ... [2023-11-06 23:04:13,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:04:13,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:13,809 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:04:13,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:04:13,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:04:13,873 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 23:04:13,873 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 23:04:13,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:04:13,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:04:13,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:04:14,092 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:04:14,094 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:04:15,838 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:04:15,862 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:04:15,862 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 23:04:15,867 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:04:15 BoogieIcfgContainer [2023-11-06 23:04:15,867 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:04:15,872 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:04:15,872 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:04:15,876 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:04:15,876 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:04:12" (1/3) ... [2023-11-06 23:04:15,877 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d89ea34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:04:15, skipping insertion in model container [2023-11-06 23:04:15,877 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:13" (2/3) ... [2023-11-06 23:04:15,880 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d89ea34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:04:15, skipping insertion in model container [2023-11-06 23:04:15,880 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:04:15" (3/3) ... [2023-11-06 23:04:15,881 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-500_file-83.i [2023-11-06 23:04:15,905 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:04:15,906 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 23:04:15,988 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:04:15,997 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@255e717b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:04:15,997 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 23:04:16,005 INFO L276 IsEmpty]: Start isEmpty. Operand has 357 states, 249 states have (on average 1.6666666666666667) internal successors, (415), 250 states have internal predecessors, (415), 105 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 105 states have call predecessors, (105), 105 states have call successors, (105) [2023-11-06 23:04:16,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 686 [2023-11-06 23:04:16,061 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:16,062 INFO L195 NwaCegarLoop]: trace histogram [105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:16,063 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:16,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:16,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1835408979, now seen corresponding path program 1 times [2023-11-06 23:04:16,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:16,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003852377] [2023-11-06 23:04:16,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:16,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:16,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:16,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:16,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003852377] [2023-11-06 23:04:16,748 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 23:04:16,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347414855] [2023-11-06 23:04:16,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:16,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:16,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:16,766 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:16,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:04:17,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:17,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 1645 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 23:04:17,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:17,591 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 208 proven. 0 refuted. 0 times theorem prover too weak. 21632 trivial. 0 not checked. [2023-11-06 23:04:17,592 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:04:17,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347414855] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:17,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:17,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:04:17,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759482288] [2023-11-06 23:04:17,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:17,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 23:04:17,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:17,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 23:04:17,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 23:04:17,643 INFO L87 Difference]: Start difference. First operand has 357 states, 249 states have (on average 1.6666666666666667) internal successors, (415), 250 states have internal predecessors, (415), 105 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 105 states have call predecessors, (105), 105 states have call successors, (105) Second operand has 2 states, 2 states have (on average 82.5) internal successors, (165), 2 states have internal predecessors, (165), 2 states have call successors, (105), 2 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 2 states have call successors, (105) [2023-11-06 23:04:17,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:17,751 INFO L93 Difference]: Finished difference Result 707 states and 1349 transitions. [2023-11-06 23:04:17,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 23:04:17,754 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 82.5) internal successors, (165), 2 states have internal predecessors, (165), 2 states have call successors, (105), 2 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 2 states have call successors, (105) Word has length 685 [2023-11-06 23:04:17,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:17,767 INFO L225 Difference]: With dead ends: 707 [2023-11-06 23:04:17,767 INFO L226 Difference]: Without dead ends: 353 [2023-11-06 23:04:17,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 684 GetRequests, 684 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 23:04:17,780 INFO L413 NwaCegarLoop]: 618 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:17,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:04:17,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2023-11-06 23:04:17,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 353. [2023-11-06 23:04:17,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 246 states have (on average 1.6585365853658536) internal successors, (408), 246 states have internal predecessors, (408), 105 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 105 states have call predecessors, (105), 105 states have call successors, (105) [2023-11-06 23:04:17,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 618 transitions. [2023-11-06 23:04:17,899 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 618 transitions. Word has length 685 [2023-11-06 23:04:17,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:17,900 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 618 transitions. [2023-11-06 23:04:17,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 82.5) internal successors, (165), 2 states have internal predecessors, (165), 2 states have call successors, (105), 2 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 2 states have call successors, (105) [2023-11-06 23:04:17,901 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 618 transitions. [2023-11-06 23:04:17,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 686 [2023-11-06 23:04:17,926 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:17,927 INFO L195 NwaCegarLoop]: trace histogram [105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:17,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-06 23:04:18,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:18,135 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:18,136 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:18,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1995912445, now seen corresponding path program 1 times [2023-11-06 23:04:18,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:18,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273464175] [2023-11-06 23:04:18,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:18,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:18,399 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:18,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [115310633] [2023-11-06 23:04:18,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:18,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:18,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:18,402 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:18,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:04:18,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:18,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 1645 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 23:04:18,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:19,113 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21840 trivial. 0 not checked. [2023-11-06 23:04:19,114 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:04:19,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:19,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273464175] [2023-11-06 23:04:19,117 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:19,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115310633] [2023-11-06 23:04:19,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115310633] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:19,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:19,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:04:19,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871577780] [2023-11-06 23:04:19,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:19,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:04:19,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:19,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:04:19,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:04:19,131 INFO L87 Difference]: Start difference. First operand 353 states and 618 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) [2023-11-06 23:04:19,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:19,239 INFO L93 Difference]: Finished difference Result 703 states and 1233 transitions. [2023-11-06 23:04:19,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:04:19,242 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) Word has length 685 [2023-11-06 23:04:19,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:19,254 INFO L225 Difference]: With dead ends: 703 [2023-11-06 23:04:19,255 INFO L226 Difference]: Without dead ends: 353 [2023-11-06 23:04:19,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 684 GetRequests, 683 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:04:19,260 INFO L413 NwaCegarLoop]: 616 mSDtfsCounter, 0 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1226 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:19,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1226 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:04:19,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2023-11-06 23:04:19,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 353. [2023-11-06 23:04:19,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 246 states have (on average 1.6544715447154472) internal successors, (407), 246 states have internal predecessors, (407), 105 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 105 states have call predecessors, (105), 105 states have call successors, (105) [2023-11-06 23:04:19,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 617 transitions. [2023-11-06 23:04:19,361 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 617 transitions. Word has length 685 [2023-11-06 23:04:19,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:19,367 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 617 transitions. [2023-11-06 23:04:19,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) [2023-11-06 23:04:19,369 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 617 transitions. [2023-11-06 23:04:19,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 686 [2023-11-06 23:04:19,384 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:19,385 INFO L195 NwaCegarLoop]: trace histogram [105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:19,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:19,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:19,596 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:19,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:19,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1269695553, now seen corresponding path program 1 times [2023-11-06 23:04:19,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:19,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006749094] [2023-11-06 23:04:19,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:19,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:19,785 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:19,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1908289259] [2023-11-06 23:04:19,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:19,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:19,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:19,793 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:19,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:04:20,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:20,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 1643 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 23:04:20,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:20,596 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21840 trivial. 0 not checked. [2023-11-06 23:04:20,596 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:04:20,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:20,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006749094] [2023-11-06 23:04:20,597 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:20,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908289259] [2023-11-06 23:04:20,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908289259] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:20,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:20,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:04:20,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515913581] [2023-11-06 23:04:20,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:20,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:04:20,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:20,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:04:20,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:04:20,604 INFO L87 Difference]: Start difference. First operand 353 states and 617 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) [2023-11-06 23:04:20,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:20,679 INFO L93 Difference]: Finished difference Result 928 states and 1632 transitions. [2023-11-06 23:04:20,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:04:20,680 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) Word has length 685 [2023-11-06 23:04:20,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:20,690 INFO L225 Difference]: With dead ends: 928 [2023-11-06 23:04:20,690 INFO L226 Difference]: Without dead ends: 578 [2023-11-06 23:04:20,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 684 GetRequests, 683 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:04:20,694 INFO L413 NwaCegarLoop]: 616 mSDtfsCounter, 381 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 1222 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:20,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 1222 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:04:20,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2023-11-06 23:04:20,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 575. [2023-11-06 23:04:20,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 423 states have (on average 1.6950354609929077) internal successors, (717), 424 states have internal predecessors, (717), 149 states have call successors, (149), 2 states have call predecessors, (149), 2 states have return successors, (149), 148 states have call predecessors, (149), 149 states have call successors, (149) [2023-11-06 23:04:20,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1015 transitions. [2023-11-06 23:04:20,821 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1015 transitions. Word has length 685 [2023-11-06 23:04:20,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:20,827 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 1015 transitions. [2023-11-06 23:04:20,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) [2023-11-06 23:04:20,828 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1015 transitions. [2023-11-06 23:04:20,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 686 [2023-11-06 23:04:20,844 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:20,845 INFO L195 NwaCegarLoop]: trace histogram [105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:20,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:21,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:21,056 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:21,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:21,057 INFO L85 PathProgramCache]: Analyzing trace with hash -416484285, now seen corresponding path program 1 times [2023-11-06 23:04:21,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:21,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718814994] [2023-11-06 23:04:21,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:21,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:21,210 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:21,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1185545706] [2023-11-06 23:04:21,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:21,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:21,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:21,213 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:21,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 23:04:21,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:21,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 1646 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 23:04:21,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:22,004 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21840 trivial. 0 not checked. [2023-11-06 23:04:22,004 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:04:22,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:22,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718814994] [2023-11-06 23:04:22,006 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:22,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185545706] [2023-11-06 23:04:22,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185545706] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:22,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:22,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:04:22,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816891788] [2023-11-06 23:04:22,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:22,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:04:22,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:22,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:04:22,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:04:22,015 INFO L87 Difference]: Start difference. First operand 575 states and 1015 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) [2023-11-06 23:04:22,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:22,150 INFO L93 Difference]: Finished difference Result 1513 states and 2666 transitions. [2023-11-06 23:04:22,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:04:22,151 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) Word has length 685 [2023-11-06 23:04:22,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:22,165 INFO L225 Difference]: With dead ends: 1513 [2023-11-06 23:04:22,166 INFO L226 Difference]: Without dead ends: 941 [2023-11-06 23:04:22,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 684 GetRequests, 683 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:04:22,175 INFO L413 NwaCegarLoop]: 731 mSDtfsCounter, 305 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 1330 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:22,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 1330 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:04:22,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2023-11-06 23:04:22,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 938. [2023-11-06 23:04:22,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 694 states have (on average 1.6772334293948126) internal successors, (1164), 697 states have internal predecessors, (1164), 239 states have call successors, (239), 4 states have call predecessors, (239), 4 states have return successors, (239), 236 states have call predecessors, (239), 239 states have call successors, (239) [2023-11-06 23:04:22,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1642 transitions. [2023-11-06 23:04:22,325 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1642 transitions. Word has length 685 [2023-11-06 23:04:22,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:22,328 INFO L495 AbstractCegarLoop]: Abstraction has 938 states and 1642 transitions. [2023-11-06 23:04:22,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) [2023-11-06 23:04:22,329 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1642 transitions. [2023-11-06 23:04:22,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 686 [2023-11-06 23:04:22,339 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:22,340 INFO L195 NwaCegarLoop]: trace histogram [105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:22,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:22,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:22,551 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:22,551 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:22,552 INFO L85 PathProgramCache]: Analyzing trace with hash -400965567, now seen corresponding path program 1 times [2023-11-06 23:04:22,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:22,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455453213] [2023-11-06 23:04:22,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:22,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:22,683 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:22,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1594165964] [2023-11-06 23:04:22,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:22,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:22,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:22,686 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:22,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 23:04:23,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:23,406 INFO L262 TraceCheckSpWp]: Trace formula consists of 1647 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:04:23,422 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:24,354 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 8672 proven. 228 refuted. 0 times theorem prover too weak. 12940 trivial. 0 not checked. [2023-11-06 23:04:24,354 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:25,013 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 84 proven. 228 refuted. 0 times theorem prover too weak. 21528 trivial. 0 not checked. [2023-11-06 23:04:25,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:25,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455453213] [2023-11-06 23:04:25,014 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:25,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594165964] [2023-11-06 23:04:25,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594165964] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:04:25,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:04:25,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-06 23:04:25,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993459576] [2023-11-06 23:04:25,016 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:04:25,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:04:25,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:25,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:04:25,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:04:25,021 INFO L87 Difference]: Start difference. First operand 938 states and 1642 transitions. Second operand has 8 states, 8 states have (on average 27.375) internal successors, (219), 8 states have internal predecessors, (219), 3 states have call successors, (181), 2 states have call predecessors, (181), 4 states have return successors, (182), 3 states have call predecessors, (182), 3 states have call successors, (182) [2023-11-06 23:04:25,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:26,000 INFO L93 Difference]: Finished difference Result 1897 states and 3301 transitions. [2023-11-06 23:04:26,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:04:26,001 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.375) internal successors, (219), 8 states have internal predecessors, (219), 3 states have call successors, (181), 2 states have call predecessors, (181), 4 states have return successors, (182), 3 states have call predecessors, (182), 3 states have call successors, (182) Word has length 685 [2023-11-06 23:04:26,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:26,014 INFO L225 Difference]: With dead ends: 1897 [2023-11-06 23:04:26,014 INFO L226 Difference]: Without dead ends: 962 [2023-11-06 23:04:26,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1372 GetRequests, 1362 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-06 23:04:26,020 INFO L413 NwaCegarLoop]: 475 mSDtfsCounter, 742 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 770 SdHoareTripleChecker+Valid, 1214 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:26,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [770 Valid, 1214 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 23:04:26,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2023-11-06 23:04:26,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 954. [2023-11-06 23:04:26,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 706 states have (on average 1.6628895184135977) internal successors, (1174), 709 states have internal predecessors, (1174), 239 states have call successors, (239), 8 states have call predecessors, (239), 8 states have return successors, (239), 236 states have call predecessors, (239), 239 states have call successors, (239) [2023-11-06 23:04:26,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 1652 transitions. [2023-11-06 23:04:26,186 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 1652 transitions. Word has length 685 [2023-11-06 23:04:26,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:26,188 INFO L495 AbstractCegarLoop]: Abstraction has 954 states and 1652 transitions. [2023-11-06 23:04:26,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.375) internal successors, (219), 8 states have internal predecessors, (219), 3 states have call successors, (181), 2 states have call predecessors, (181), 4 states have return successors, (182), 3 states have call predecessors, (182), 3 states have call successors, (182) [2023-11-06 23:04:26,189 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 1652 transitions. [2023-11-06 23:04:26,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 687 [2023-11-06 23:04:26,204 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:26,205 INFO L195 NwaCegarLoop]: trace histogram [105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:26,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-06 23:04:26,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:26,416 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:26,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:26,418 INFO L85 PathProgramCache]: Analyzing trace with hash -276435837, now seen corresponding path program 1 times [2023-11-06 23:04:26,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:26,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604310876] [2023-11-06 23:04:26,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:26,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:26,558 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:26,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [942449298] [2023-11-06 23:04:26,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:26,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:26,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:26,561 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:26,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 23:04:27,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:27,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 1648 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 23:04:27,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:27,645 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21840 trivial. 0 not checked. [2023-11-06 23:04:27,645 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:04:27,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:27,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604310876] [2023-11-06 23:04:27,646 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:27,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942449298] [2023-11-06 23:04:27,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942449298] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:27,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:27,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-06 23:04:27,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776492020] [2023-11-06 23:04:27,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:27,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:04:27,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:27,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:04:27,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:04:27,652 INFO L87 Difference]: Start difference. First operand 954 states and 1652 transitions. Second operand has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) [2023-11-06 23:04:30,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:30,745 INFO L93 Difference]: Finished difference Result 6215 states and 10864 transitions. [2023-11-06 23:04:30,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 23:04:30,746 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) Word has length 686 [2023-11-06 23:04:30,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:30,784 INFO L225 Difference]: With dead ends: 6215 [2023-11-06 23:04:30,784 INFO L226 Difference]: Without dead ends: 5264 [2023-11-06 23:04:30,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 692 GetRequests, 682 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-06 23:04:30,790 INFO L413 NwaCegarLoop]: 1426 mSDtfsCounter, 2321 mSDsluCounter, 4181 mSDsCounter, 0 mSdLazyCounter, 1476 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2321 SdHoareTripleChecker+Valid, 5607 SdHoareTripleChecker+Invalid, 1608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:30,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2321 Valid, 5607 Invalid, 1608 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [132 Valid, 1476 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-06 23:04:30,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5264 states. [2023-11-06 23:04:31,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5264 to 2016. [2023-11-06 23:04:31,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2016 states, 1564 states have (on average 1.6905370843989769) internal successors, (2644), 1571 states have internal predecessors, (2644), 427 states have call successors, (427), 24 states have call predecessors, (427), 24 states have return successors, (427), 420 states have call predecessors, (427), 427 states have call successors, (427) [2023-11-06 23:04:31,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2016 states to 2016 states and 3498 transitions. [2023-11-06 23:04:31,082 INFO L78 Accepts]: Start accepts. Automaton has 2016 states and 3498 transitions. Word has length 686 [2023-11-06 23:04:31,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:31,083 INFO L495 AbstractCegarLoop]: Abstraction has 2016 states and 3498 transitions. [2023-11-06 23:04:31,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) [2023-11-06 23:04:31,084 INFO L276 IsEmpty]: Start isEmpty. Operand 2016 states and 3498 transitions. [2023-11-06 23:04:31,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 688 [2023-11-06 23:04:31,095 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:31,095 INFO L195 NwaCegarLoop]: trace histogram [105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:31,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:31,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 23:04:31,306 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:31,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:31,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1458113219, now seen corresponding path program 1 times [2023-11-06 23:04:31,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:31,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127100434] [2023-11-06 23:04:31,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:31,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:31,469 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:31,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [135613411] [2023-11-06 23:04:31,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:31,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:31,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:31,472 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:31,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 23:04:32,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:32,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 1650 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:04:32,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:32,768 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 9968 proven. 204 refuted. 0 times theorem prover too weak. 11668 trivial. 0 not checked. [2023-11-06 23:04:32,768 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:33,250 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 108 proven. 204 refuted. 0 times theorem prover too weak. 21528 trivial. 0 not checked. [2023-11-06 23:04:33,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:33,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127100434] [2023-11-06 23:04:33,251 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:33,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135613411] [2023-11-06 23:04:33,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135613411] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:04:33,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:04:33,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-06 23:04:33,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053324587] [2023-11-06 23:04:33,253 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:04:33,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:04:33,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:33,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:04:33,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:04:33,258 INFO L87 Difference]: Start difference. First operand 2016 states and 3498 transitions. Second operand has 8 states, 8 states have (on average 28.625) internal successors, (229), 8 states have internal predecessors, (229), 3 states have call successors, (173), 2 states have call predecessors, (173), 4 states have return successors, (174), 3 states have call predecessors, (174), 3 states have call successors, (174) [2023-11-06 23:04:34,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:34,196 INFO L93 Difference]: Finished difference Result 4093 states and 7049 transitions. [2023-11-06 23:04:34,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:04:34,198 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 28.625) internal successors, (229), 8 states have internal predecessors, (229), 3 states have call successors, (173), 2 states have call predecessors, (173), 4 states have return successors, (174), 3 states have call predecessors, (174), 3 states have call successors, (174) Word has length 687 [2023-11-06 23:04:34,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:34,222 INFO L225 Difference]: With dead ends: 4093 [2023-11-06 23:04:34,222 INFO L226 Difference]: Without dead ends: 2080 [2023-11-06 23:04:34,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1376 GetRequests, 1366 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-06 23:04:34,232 INFO L413 NwaCegarLoop]: 491 mSDtfsCounter, 386 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 1263 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:34,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 1263 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 23:04:34,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2080 states. [2023-11-06 23:04:34,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2080 to 2048. [2023-11-06 23:04:34,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2048 states, 1588 states have (on average 1.6750629722921915) internal successors, (2660), 1595 states have internal predecessors, (2660), 427 states have call successors, (427), 32 states have call predecessors, (427), 32 states have return successors, (427), 420 states have call predecessors, (427), 427 states have call successors, (427) [2023-11-06 23:04:34,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2048 states to 2048 states and 3514 transitions. [2023-11-06 23:04:34,566 INFO L78 Accepts]: Start accepts. Automaton has 2048 states and 3514 transitions. Word has length 687 [2023-11-06 23:04:34,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:34,568 INFO L495 AbstractCegarLoop]: Abstraction has 2048 states and 3514 transitions. [2023-11-06 23:04:34,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 28.625) internal successors, (229), 8 states have internal predecessors, (229), 3 states have call successors, (173), 2 states have call predecessors, (173), 4 states have return successors, (174), 3 states have call predecessors, (174), 3 states have call successors, (174) [2023-11-06 23:04:34,569 INFO L276 IsEmpty]: Start isEmpty. Operand 2048 states and 3514 transitions. [2023-11-06 23:04:34,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 689 [2023-11-06 23:04:34,581 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:34,582 INFO L195 NwaCegarLoop]: trace histogram [105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:34,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:34,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 23:04:34,793 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:34,793 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:34,793 INFO L85 PathProgramCache]: Analyzing trace with hash 927351100, now seen corresponding path program 1 times [2023-11-06 23:04:34,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:34,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011277404] [2023-11-06 23:04:34,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:34,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:34,963 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:34,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1243301897] [2023-11-06 23:04:34,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:34,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:34,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:34,969 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:34,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 23:04:35,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:35,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 1651 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:04:35,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:35,889 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 4704 proven. 36 refuted. 0 times theorem prover too weak. 17100 trivial. 0 not checked. [2023-11-06 23:04:35,889 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:36,451 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 276 proven. 36 refuted. 0 times theorem prover too weak. 21528 trivial. 0 not checked. [2023-11-06 23:04:36,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:36,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011277404] [2023-11-06 23:04:36,452 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:36,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243301897] [2023-11-06 23:04:36,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243301897] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:04:36,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:04:36,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-06 23:04:36,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221624930] [2023-11-06 23:04:36,453 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:04:36,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:04:36,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:36,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:04:36,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:04:36,460 INFO L87 Difference]: Start difference. First operand 2048 states and 3514 transitions. Second operand has 8 states, 8 states have (on average 30.375) internal successors, (243), 8 states have internal predecessors, (243), 3 states have call successors, (117), 2 states have call predecessors, (117), 4 states have return successors, (118), 3 states have call predecessors, (118), 3 states have call successors, (118) [2023-11-06 23:04:37,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:37,435 INFO L93 Difference]: Finished difference Result 4129 states and 7060 transitions. [2023-11-06 23:04:37,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:04:37,436 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 30.375) internal successors, (243), 8 states have internal predecessors, (243), 3 states have call successors, (117), 2 states have call predecessors, (117), 4 states have return successors, (118), 3 states have call predecessors, (118), 3 states have call successors, (118) Word has length 688 [2023-11-06 23:04:37,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:37,456 INFO L225 Difference]: With dead ends: 4129 [2023-11-06 23:04:37,457 INFO L226 Difference]: Without dead ends: 2084 [2023-11-06 23:04:37,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1378 GetRequests, 1368 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-06 23:04:37,467 INFO L413 NwaCegarLoop]: 498 mSDtfsCounter, 427 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 1286 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:37,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [519 Valid, 1286 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 23:04:37,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2084 states. [2023-11-06 23:04:37,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2084 to 2052. [2023-11-06 23:04:37,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2052 states, 1591 states have (on average 1.6637335009428034) internal successors, (2647), 1598 states have internal predecessors, (2647), 427 states have call successors, (427), 33 states have call predecessors, (427), 33 states have return successors, (427), 420 states have call predecessors, (427), 427 states have call successors, (427) [2023-11-06 23:04:37,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2052 states to 2052 states and 3501 transitions. [2023-11-06 23:04:37,821 INFO L78 Accepts]: Start accepts. Automaton has 2052 states and 3501 transitions. Word has length 688 [2023-11-06 23:04:37,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:37,823 INFO L495 AbstractCegarLoop]: Abstraction has 2052 states and 3501 transitions. [2023-11-06 23:04:37,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 30.375) internal successors, (243), 8 states have internal predecessors, (243), 3 states have call successors, (117), 2 states have call predecessors, (117), 4 states have return successors, (118), 3 states have call predecessors, (118), 3 states have call successors, (118) [2023-11-06 23:04:37,824 INFO L276 IsEmpty]: Start isEmpty. Operand 2052 states and 3501 transitions. [2023-11-06 23:04:37,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 690 [2023-11-06 23:04:37,841 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:37,842 INFO L195 NwaCegarLoop]: trace histogram [105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:37,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:38,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-06 23:04:38,054 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:38,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:38,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1696337669, now seen corresponding path program 1 times [2023-11-06 23:04:38,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:38,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736982857] [2023-11-06 23:04:38,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:38,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:38,192 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:38,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [228144382] [2023-11-06 23:04:38,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:38,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:38,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:38,195 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:38,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 23:04:38,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:38,910 INFO L262 TraceCheckSpWp]: Trace formula consists of 1650 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:04:38,928 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:39,711 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 10914 proven. 171 refuted. 0 times theorem prover too weak. 10755 trivial. 0 not checked. [2023-11-06 23:04:39,711 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:40,495 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 141 proven. 171 refuted. 0 times theorem prover too weak. 21528 trivial. 0 not checked. [2023-11-06 23:04:40,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:40,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736982857] [2023-11-06 23:04:40,496 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:40,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228144382] [2023-11-06 23:04:40,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228144382] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:04:40,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:04:40,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 23:04:40,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315245976] [2023-11-06 23:04:40,497 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:04:40,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:04:40,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:40,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:04:40,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:04:40,504 INFO L87 Difference]: Start difference. First operand 2052 states and 3501 transitions. Second operand has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 2 states have call successors, (162), 2 states have call predecessors, (162), 4 states have return successors, (163), 2 states have call predecessors, (163), 2 states have call successors, (163) [2023-11-06 23:04:41,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:41,350 INFO L93 Difference]: Finished difference Result 3339 states and 5713 transitions. [2023-11-06 23:04:41,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:04:41,351 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 2 states have call successors, (162), 2 states have call predecessors, (162), 4 states have return successors, (163), 2 states have call predecessors, (163), 2 states have call successors, (163) Word has length 689 [2023-11-06 23:04:41,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:41,363 INFO L225 Difference]: With dead ends: 3339 [2023-11-06 23:04:41,363 INFO L226 Difference]: Without dead ends: 1290 [2023-11-06 23:04:41,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1380 GetRequests, 1370 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-06 23:04:41,371 INFO L413 NwaCegarLoop]: 489 mSDtfsCounter, 372 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 1256 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:41,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [418 Valid, 1256 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 23:04:41,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2023-11-06 23:04:41,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 1270. [2023-11-06 23:04:41,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 1003 states have (on average 1.6679960119641077) internal successors, (1673), 1006 states have internal predecessors, (1673), 247 states have call successors, (247), 19 states have call predecessors, (247), 19 states have return successors, (247), 244 states have call predecessors, (247), 247 states have call successors, (247) [2023-11-06 23:04:41,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 2167 transitions. [2023-11-06 23:04:41,509 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 2167 transitions. Word has length 689 [2023-11-06 23:04:41,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:41,510 INFO L495 AbstractCegarLoop]: Abstraction has 1270 states and 2167 transitions. [2023-11-06 23:04:41,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 2 states have call successors, (162), 2 states have call predecessors, (162), 4 states have return successors, (163), 2 states have call predecessors, (163), 2 states have call successors, (163) [2023-11-06 23:04:41,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 2167 transitions. [2023-11-06 23:04:41,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 690 [2023-11-06 23:04:41,521 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:41,521 INFO L195 NwaCegarLoop]: trace histogram [105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:41,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:41,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:41,732 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:41,733 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:41,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1665554363, now seen corresponding path program 1 times [2023-11-06 23:04:41,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:41,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998897748] [2023-11-06 23:04:41,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:41,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:41,832 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:41,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [405899736] [2023-11-06 23:04:41,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:41,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:41,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:41,834 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:41,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 23:04:42,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:42,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 1648 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 23:04:42,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:44,509 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 15236 proven. 198 refuted. 0 times theorem prover too weak. 6406 trivial. 0 not checked. [2023-11-06 23:04:44,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:45,486 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 114 proven. 198 refuted. 0 times theorem prover too weak. 21528 trivial. 0 not checked. [2023-11-06 23:04:45,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:45,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998897748] [2023-11-06 23:04:45,487 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:45,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405899736] [2023-11-06 23:04:45,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405899736] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:04:45,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:04:45,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-11-06 23:04:45,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777276861] [2023-11-06 23:04:45,489 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:04:45,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 23:04:45,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:45,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 23:04:45,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2023-11-06 23:04:45,504 INFO L87 Difference]: Start difference. First operand 1270 states and 2167 transitions. Second operand has 14 states, 14 states have (on average 17.928571428571427) internal successors, (251), 14 states have internal predecessors, (251), 7 states have call successors, (171), 4 states have call predecessors, (171), 6 states have return successors, (172), 7 states have call predecessors, (172), 7 states have call successors, (172) [2023-11-06 23:04:47,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:47,932 INFO L93 Difference]: Finished difference Result 4305 states and 7238 transitions. [2023-11-06 23:04:47,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-06 23:04:47,934 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 17.928571428571427) internal successors, (251), 14 states have internal predecessors, (251), 7 states have call successors, (171), 4 states have call predecessors, (171), 6 states have return successors, (172), 7 states have call predecessors, (172), 7 states have call successors, (172) Word has length 689 [2023-11-06 23:04:47,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:47,961 INFO L225 Difference]: With dead ends: 4305 [2023-11-06 23:04:47,961 INFO L226 Difference]: Without dead ends: 3038 [2023-11-06 23:04:47,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1393 GetRequests, 1365 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=293, Invalid=577, Unknown=0, NotChecked=0, Total=870 [2023-11-06 23:04:47,968 INFO L413 NwaCegarLoop]: 521 mSDtfsCounter, 3015 mSDsluCounter, 1677 mSDsCounter, 0 mSdLazyCounter, 1430 mSolverCounterSat, 640 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3091 SdHoareTripleChecker+Valid, 2198 SdHoareTripleChecker+Invalid, 2070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 640 IncrementalHoareTripleChecker+Valid, 1430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:47,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3091 Valid, 2198 Invalid, 2070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [640 Valid, 1430 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-06 23:04:47,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3038 states. [2023-11-06 23:04:48,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3038 to 1579. [2023-11-06 23:04:48,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1579 states, 1261 states have (on average 1.6526566217287866) internal successors, (2084), 1265 states have internal predecessors, (2084), 285 states have call successors, (285), 32 states have call predecessors, (285), 32 states have return successors, (285), 281 states have call predecessors, (285), 285 states have call successors, (285) [2023-11-06 23:04:48,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 2654 transitions. [2023-11-06 23:04:48,232 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 2654 transitions. Word has length 689 [2023-11-06 23:04:48,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:48,234 INFO L495 AbstractCegarLoop]: Abstraction has 1579 states and 2654 transitions. [2023-11-06 23:04:48,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 17.928571428571427) internal successors, (251), 14 states have internal predecessors, (251), 7 states have call successors, (171), 4 states have call predecessors, (171), 6 states have return successors, (172), 7 states have call predecessors, (172), 7 states have call successors, (172) [2023-11-06 23:04:48,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 2654 transitions. [2023-11-06 23:04:48,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 690 [2023-11-06 23:04:48,245 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:48,246 INFO L195 NwaCegarLoop]: trace histogram [105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:48,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:48,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 23:04:48,458 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:48,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:48,459 INFO L85 PathProgramCache]: Analyzing trace with hash 698203709, now seen corresponding path program 1 times [2023-11-06 23:04:48,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:48,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088248838] [2023-11-06 23:04:48,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:48,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:48,570 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:48,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [873466356] [2023-11-06 23:04:48,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:48,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:48,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:48,573 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:48,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 23:04:49,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:49,360 INFO L262 TraceCheckSpWp]: Trace formula consists of 1648 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 23:04:49,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:50,645 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 14496 proven. 81 refuted. 0 times theorem prover too weak. 7263 trivial. 0 not checked. [2023-11-06 23:04:50,646 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:51,980 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 231 proven. 81 refuted. 0 times theorem prover too weak. 21528 trivial. 0 not checked. [2023-11-06 23:04:51,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:51,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088248838] [2023-11-06 23:04:51,981 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:51,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873466356] [2023-11-06 23:04:51,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873466356] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:04:51,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:04:51,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-11-06 23:04:51,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958676377] [2023-11-06 23:04:51,982 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:04:51,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 23:04:51,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:51,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 23:04:51,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2023-11-06 23:04:51,986 INFO L87 Difference]: Start difference. First operand 1579 states and 2654 transitions. Second operand has 14 states, 14 states have (on average 18.5) internal successors, (259), 14 states have internal predecessors, (259), 5 states have call successors, (168), 3 states have call predecessors, (168), 5 states have return successors, (168), 5 states have call predecessors, (168), 5 states have call successors, (168) [2023-11-06 23:04:53,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:53,708 INFO L93 Difference]: Finished difference Result 4167 states and 6980 transitions. [2023-11-06 23:04:53,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 23:04:53,709 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 18.5) internal successors, (259), 14 states have internal predecessors, (259), 5 states have call successors, (168), 3 states have call predecessors, (168), 5 states have return successors, (168), 5 states have call predecessors, (168), 5 states have call successors, (168) Word has length 689 [2023-11-06 23:04:53,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:53,731 INFO L225 Difference]: With dead ends: 4167 [2023-11-06 23:04:53,732 INFO L226 Difference]: Without dead ends: 2591 [2023-11-06 23:04:53,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1383 GetRequests, 1364 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=151, Invalid=269, Unknown=0, NotChecked=0, Total=420 [2023-11-06 23:04:53,737 INFO L413 NwaCegarLoop]: 472 mSDtfsCounter, 2626 mSDsluCounter, 1453 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 593 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2737 SdHoareTripleChecker+Valid, 1925 SdHoareTripleChecker+Invalid, 1670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 593 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:53,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2737 Valid, 1925 Invalid, 1670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [593 Valid, 1077 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-06 23:04:53,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2591 states. [2023-11-06 23:04:54,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2591 to 2550. [2023-11-06 23:04:54,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2550 states, 2046 states have (on average 1.6466275659824048) internal successors, (3369), 2055 states have internal predecessors, (3369), 455 states have call successors, (455), 48 states have call predecessors, (455), 48 states have return successors, (455), 446 states have call predecessors, (455), 455 states have call successors, (455) [2023-11-06 23:04:54,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2550 states to 2550 states and 4279 transitions. [2023-11-06 23:04:54,085 INFO L78 Accepts]: Start accepts. Automaton has 2550 states and 4279 transitions. Word has length 689 [2023-11-06 23:04:54,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:54,086 INFO L495 AbstractCegarLoop]: Abstraction has 2550 states and 4279 transitions. [2023-11-06 23:04:54,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 18.5) internal successors, (259), 14 states have internal predecessors, (259), 5 states have call successors, (168), 3 states have call predecessors, (168), 5 states have return successors, (168), 5 states have call predecessors, (168), 5 states have call successors, (168) [2023-11-06 23:04:54,087 INFO L276 IsEmpty]: Start isEmpty. Operand 2550 states and 4279 transitions. [2023-11-06 23:04:54,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 691 [2023-11-06 23:04:54,100 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:54,101 INFO L195 NwaCegarLoop]: trace histogram [105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:54,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:54,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:54,312 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:54,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:54,312 INFO L85 PathProgramCache]: Analyzing trace with hash 666575754, now seen corresponding path program 1 times [2023-11-06 23:04:54,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:54,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146531252] [2023-11-06 23:04:54,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:54,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:54,406 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:54,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [464826106] [2023-11-06 23:04:54,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:54,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:54,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:54,408 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:54,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 23:04:55,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:55,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 1651 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 23:04:55,188 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:55,260 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21840 trivial. 0 not checked. [2023-11-06 23:04:55,260 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:04:55,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:55,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146531252] [2023-11-06 23:04:55,261 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:55,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464826106] [2023-11-06 23:04:55,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464826106] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:55,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:55,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:04:55,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978988926] [2023-11-06 23:04:55,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:55,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:04:55,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:55,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:04:55,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:04:55,267 INFO L87 Difference]: Start difference. First operand 2550 states and 4279 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) [2023-11-06 23:04:55,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:55,626 INFO L93 Difference]: Finished difference Result 5112 states and 8585 transitions. [2023-11-06 23:04:55,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:04:55,627 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) Word has length 690 [2023-11-06 23:04:55,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:55,650 INFO L225 Difference]: With dead ends: 5112 [2023-11-06 23:04:55,650 INFO L226 Difference]: Without dead ends: 2565 [2023-11-06 23:04:55,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 689 GetRequests, 688 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:04:55,659 INFO L413 NwaCegarLoop]: 601 mSDtfsCounter, 0 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1196 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:55,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1196 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:04:55,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2565 states. [2023-11-06 23:04:55,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2565 to 2565. [2023-11-06 23:04:55,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2565 states, 2061 states have (on average 1.6419213973799127) internal successors, (3384), 2070 states have internal predecessors, (3384), 455 states have call successors, (455), 48 states have call predecessors, (455), 48 states have return successors, (455), 446 states have call predecessors, (455), 455 states have call successors, (455) [2023-11-06 23:04:55,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2565 states to 2565 states and 4294 transitions. [2023-11-06 23:04:55,963 INFO L78 Accepts]: Start accepts. Automaton has 2565 states and 4294 transitions. Word has length 690 [2023-11-06 23:04:55,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:55,965 INFO L495 AbstractCegarLoop]: Abstraction has 2565 states and 4294 transitions. [2023-11-06 23:04:55,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) [2023-11-06 23:04:55,966 INFO L276 IsEmpty]: Start isEmpty. Operand 2565 states and 4294 transitions. [2023-11-06 23:04:55,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 691 [2023-11-06 23:04:55,978 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:55,979 INFO L195 NwaCegarLoop]: trace histogram [105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:55,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:56,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 23:04:56,191 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:56,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:56,191 INFO L85 PathProgramCache]: Analyzing trace with hash -287364404, now seen corresponding path program 1 times [2023-11-06 23:04:56,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:56,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465955796] [2023-11-06 23:04:56,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:56,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:56,323 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:56,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1463235882] [2023-11-06 23:04:56,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:56,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:56,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:56,326 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:56,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 23:04:57,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:57,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 1651 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:04:57,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:57,224 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21840 trivial. 0 not checked. [2023-11-06 23:04:57,225 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:04:57,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:57,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465955796] [2023-11-06 23:04:57,225 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:57,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463235882] [2023-11-06 23:04:57,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463235882] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:57,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:57,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:04:57,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812462301] [2023-11-06 23:04:57,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:57,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:04:57,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:57,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:04:57,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:04:57,230 INFO L87 Difference]: Start difference. First operand 2565 states and 4294 transitions. Second operand has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) [2023-11-06 23:04:58,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:58,038 INFO L93 Difference]: Finished difference Result 7147 states and 11877 transitions. [2023-11-06 23:04:58,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:04:58,038 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) Word has length 690 [2023-11-06 23:04:58,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:58,062 INFO L225 Difference]: With dead ends: 7147 [2023-11-06 23:04:58,063 INFO L226 Difference]: Without dead ends: 4585 [2023-11-06 23:04:58,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 689 GetRequests, 687 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:04:58,069 INFO L413 NwaCegarLoop]: 777 mSDtfsCounter, 361 mSDsluCounter, 1188 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 1965 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:58,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 1965 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 23:04:58,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4585 states. [2023-11-06 23:04:58,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4585 to 4206. [2023-11-06 23:04:58,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4206 states, 3314 states have (on average 1.6104405552202776) internal successors, (5337), 3331 states have internal predecessors, (5337), 804 states have call successors, (804), 87 states have call predecessors, (804), 87 states have return successors, (804), 787 states have call predecessors, (804), 804 states have call successors, (804) [2023-11-06 23:04:58,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4206 states to 4206 states and 6945 transitions. [2023-11-06 23:04:58,586 INFO L78 Accepts]: Start accepts. Automaton has 4206 states and 6945 transitions. Word has length 690 [2023-11-06 23:04:58,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:58,587 INFO L495 AbstractCegarLoop]: Abstraction has 4206 states and 6945 transitions. [2023-11-06 23:04:58,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) [2023-11-06 23:04:58,588 INFO L276 IsEmpty]: Start isEmpty. Operand 4206 states and 6945 transitions. [2023-11-06 23:04:58,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 691 [2023-11-06 23:04:58,599 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:58,599 INFO L195 NwaCegarLoop]: trace histogram [105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:58,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:58,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 23:04:58,809 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:58,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:58,809 INFO L85 PathProgramCache]: Analyzing trace with hash 694403460, now seen corresponding path program 1 times [2023-11-06 23:04:58,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:58,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139866993] [2023-11-06 23:04:58,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:58,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:58,915 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:58,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [895468461] [2023-11-06 23:04:58,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:58,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:58,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:58,936 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:58,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 23:04:59,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:59,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 1651 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 23:04:59,611 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:59,692 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21840 trivial. 0 not checked. [2023-11-06 23:04:59,693 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:04:59,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:59,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139866993] [2023-11-06 23:04:59,693 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:59,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895468461] [2023-11-06 23:04:59,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895468461] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:59,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:59,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:04:59,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969525409] [2023-11-06 23:04:59,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:59,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:04:59,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:59,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:04:59,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:04:59,698 INFO L87 Difference]: Start difference. First operand 4206 states and 6945 transitions. Second operand has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) [2023-11-06 23:05:00,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:05:00,859 INFO L93 Difference]: Finished difference Result 11219 states and 18314 transitions. [2023-11-06 23:05:00,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:05:00,860 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) Word has length 690 [2023-11-06 23:05:00,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:05:00,895 INFO L225 Difference]: With dead ends: 11219 [2023-11-06 23:05:00,895 INFO L226 Difference]: Without dead ends: 7016 [2023-11-06 23:05:00,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 689 GetRequests, 687 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:05:00,906 INFO L413 NwaCegarLoop]: 812 mSDtfsCounter, 682 mSDsluCounter, 793 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 1605 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:05:00,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [682 Valid, 1605 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 23:05:00,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7016 states. [2023-11-06 23:05:01,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7016 to 5592. [2023-11-06 23:05:01,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5592 states, 4360 states have (on average 1.5928899082568808) internal successors, (6945), 4385 states have internal predecessors, (6945), 1108 states have call successors, (1108), 123 states have call predecessors, (1108), 123 states have return successors, (1108), 1083 states have call predecessors, (1108), 1108 states have call successors, (1108) [2023-11-06 23:05:01,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5592 states to 5592 states and 9161 transitions. [2023-11-06 23:05:01,818 INFO L78 Accepts]: Start accepts. Automaton has 5592 states and 9161 transitions. Word has length 690 [2023-11-06 23:05:01,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:05:01,820 INFO L495 AbstractCegarLoop]: Abstraction has 5592 states and 9161 transitions. [2023-11-06 23:05:01,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) [2023-11-06 23:05:01,820 INFO L276 IsEmpty]: Start isEmpty. Operand 5592 states and 9161 transitions. [2023-11-06 23:05:01,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 691 [2023-11-06 23:05:01,833 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:05:01,833 INFO L195 NwaCegarLoop]: trace histogram [105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:05:01,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:02,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 23:05:02,043 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:05:02,043 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:02,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1255103238, now seen corresponding path program 1 times [2023-11-06 23:05:02,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:02,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828794855] [2023-11-06 23:05:02,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:02,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:02,124 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:05:02,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [956425712] [2023-11-06 23:05:02,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:02,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:02,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:02,126 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:02,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 23:05:02,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:02,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 1653 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 23:05:03,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:03,134 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21840 trivial. 0 not checked. [2023-11-06 23:05:03,134 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:05:03,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:03,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828794855] [2023-11-06 23:05:03,135 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:05:03,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956425712] [2023-11-06 23:05:03,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956425712] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:05:03,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:05:03,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 23:05:03,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279488813] [2023-11-06 23:05:03,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:05:03,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:05:03,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:03,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:05:03,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:05:03,139 INFO L87 Difference]: Start difference. First operand 5592 states and 9161 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 5 states have internal predecessors, (168), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) [2023-11-06 23:05:07,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:05:07,692 INFO L93 Difference]: Finished difference Result 35001 states and 56942 transitions. [2023-11-06 23:05:07,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 23:05:07,693 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 5 states have internal predecessors, (168), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) Word has length 690 [2023-11-06 23:05:07,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:05:07,814 INFO L225 Difference]: With dead ends: 35001 [2023-11-06 23:05:07,815 INFO L226 Difference]: Without dead ends: 29412 [2023-11-06 23:05:07,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 688 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:05:07,839 INFO L413 NwaCegarLoop]: 1758 mSDtfsCounter, 1710 mSDsluCounter, 2637 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1710 SdHoareTripleChecker+Valid, 4395 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 23:05:07,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1710 Valid, 4395 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 23:05:07,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29412 states. [2023-11-06 23:05:10,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29412 to 16071. [2023-11-06 23:05:10,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16071 states, 12536 states have (on average 1.5760210593490747) internal successors, (19757), 12610 states have internal predecessors, (19757), 3176 states have call successors, (3176), 358 states have call predecessors, (3176), 358 states have return successors, (3176), 3102 states have call predecessors, (3176), 3176 states have call successors, (3176) [2023-11-06 23:05:10,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16071 states to 16071 states and 26109 transitions. [2023-11-06 23:05:10,983 INFO L78 Accepts]: Start accepts. Automaton has 16071 states and 26109 transitions. Word has length 690 [2023-11-06 23:05:10,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:05:10,984 INFO L495 AbstractCegarLoop]: Abstraction has 16071 states and 26109 transitions. [2023-11-06 23:05:10,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 5 states have internal predecessors, (168), 1 states have call successors, (105), 1 states have call predecessors, (105), 1 states have return successors, (105), 1 states have call predecessors, (105), 1 states have call successors, (105) [2023-11-06 23:05:10,985 INFO L276 IsEmpty]: Start isEmpty. Operand 16071 states and 26109 transitions. [2023-11-06 23:05:11,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 691 [2023-11-06 23:05:11,013 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:05:11,014 INFO L195 NwaCegarLoop]: trace histogram [105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:05:11,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:11,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 23:05:11,226 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:05:11,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:11,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1160733112, now seen corresponding path program 1 times [2023-11-06 23:05:11,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:11,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954812297] [2023-11-06 23:05:11,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:11,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:11,334 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:05:11,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [389157506] [2023-11-06 23:05:11,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:11,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:11,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:11,336 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:11,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 23:05:12,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:12,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 1653 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 23:05:12,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:14,615 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 12194 proven. 408 refuted. 0 times theorem prover too weak. 9238 trivial. 0 not checked. [2023-11-06 23:05:14,615 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:05:16,002 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 210 proven. 411 refuted. 0 times theorem prover too weak. 21219 trivial. 0 not checked. [2023-11-06 23:05:16,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:16,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954812297] [2023-11-06 23:05:16,003 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:05:16,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389157506] [2023-11-06 23:05:16,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389157506] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:05:16,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:05:16,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2023-11-06 23:05:16,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026777424] [2023-11-06 23:05:16,005 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:05:16,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 23:05:16,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:16,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 23:05:16,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2023-11-06 23:05:16,009 INFO L87 Difference]: Start difference. First operand 16071 states and 26109 transitions. Second operand has 19 states, 19 states have (on average 14.157894736842104) internal successors, (269), 19 states have internal predecessors, (269), 4 states have call successors, (181), 3 states have call predecessors, (181), 7 states have return successors, (182), 4 states have call predecessors, (182), 4 states have call successors, (182) [2023-11-06 23:05:31,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:05:31,369 INFO L93 Difference]: Finished difference Result 84228 states and 136247 transitions. [2023-11-06 23:05:31,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-06 23:05:31,370 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 14.157894736842104) internal successors, (269), 19 states have internal predecessors, (269), 4 states have call successors, (181), 3 states have call predecessors, (181), 7 states have return successors, (182), 4 states have call predecessors, (182), 4 states have call successors, (182) Word has length 690 [2023-11-06 23:05:31,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:05:31,661 INFO L225 Difference]: With dead ends: 84228 [2023-11-06 23:05:31,661 INFO L226 Difference]: Without dead ends: 68160 [2023-11-06 23:05:31,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1422 GetRequests, 1366 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=850, Invalid=2342, Unknown=0, NotChecked=0, Total=3192 [2023-11-06 23:05:31,718 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 2280 mSDsluCounter, 2680 mSDsCounter, 0 mSdLazyCounter, 2589 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2338 SdHoareTripleChecker+Valid, 3190 SdHoareTripleChecker+Invalid, 3028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 2589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-06 23:05:31,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2338 Valid, 3190 Invalid, 3028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 2589 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-06 23:05:31,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68160 states. [2023-11-06 23:05:37,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68160 to 16673. [2023-11-06 23:05:37,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16673 states, 13354 states have (on average 1.5962258499326045) internal successors, (21316), 13424 states have internal predecessors, (21316), 2960 states have call successors, (2960), 358 states have call predecessors, (2960), 358 states have return successors, (2960), 2890 states have call predecessors, (2960), 2960 states have call successors, (2960) [2023-11-06 23:05:37,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16673 states to 16673 states and 27236 transitions. [2023-11-06 23:05:37,216 INFO L78 Accepts]: Start accepts. Automaton has 16673 states and 27236 transitions. Word has length 690 [2023-11-06 23:05:37,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:05:37,217 INFO L495 AbstractCegarLoop]: Abstraction has 16673 states and 27236 transitions. [2023-11-06 23:05:37,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 14.157894736842104) internal successors, (269), 19 states have internal predecessors, (269), 4 states have call successors, (181), 3 states have call predecessors, (181), 7 states have return successors, (182), 4 states have call predecessors, (182), 4 states have call successors, (182) [2023-11-06 23:05:37,218 INFO L276 IsEmpty]: Start isEmpty. Operand 16673 states and 27236 transitions. [2023-11-06 23:05:37,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 691 [2023-11-06 23:05:37,242 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:05:37,243 INFO L195 NwaCegarLoop]: trace histogram [105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:05:37,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:37,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 23:05:37,453 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:05:37,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:37,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1120058362, now seen corresponding path program 1 times [2023-11-06 23:05:37,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:37,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627980075] [2023-11-06 23:05:37,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:37,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:37,555 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:05:37,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [702203616] [2023-11-06 23:05:37,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:37,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:37,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:37,557 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:37,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 23:05:38,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:38,418 INFO L262 TraceCheckSpWp]: Trace formula consists of 1653 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 23:05:38,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:43,077 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 14995 proven. 477 refuted. 0 times theorem prover too weak. 6368 trivial. 0 not checked. [2023-11-06 23:05:43,078 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:05:47,447 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 441 proven. 486 refuted. 0 times theorem prover too weak. 20913 trivial. 0 not checked. [2023-11-06 23:05:47,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:47,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627980075] [2023-11-06 23:05:47,447 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:05:47,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702203616] [2023-11-06 23:05:47,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702203616] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:05:47,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:05:47,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 28 [2023-11-06 23:05:47,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564115983] [2023-11-06 23:05:47,449 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:05:47,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-06 23:05:47,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:47,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-06 23:05:47,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=567, Unknown=0, NotChecked=0, Total=756 [2023-11-06 23:05:47,455 INFO L87 Difference]: Start difference. First operand 16673 states and 27236 transitions. Second operand has 28 states, 27 states have (on average 11.814814814814815) internal successors, (319), 26 states have internal predecessors, (319), 10 states have call successors, (210), 6 states have call predecessors, (210), 11 states have return successors, (210), 10 states have call predecessors, (210), 10 states have call successors, (210) [2023-11-06 23:06:30,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:06:30,731 INFO L93 Difference]: Finished difference Result 142801 states and 232738 transitions. [2023-11-06 23:06:30,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2023-11-06 23:06:30,732 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 11.814814814814815) internal successors, (319), 26 states have internal predecessors, (319), 10 states have call successors, (210), 6 states have call predecessors, (210), 11 states have return successors, (210), 10 states have call predecessors, (210), 10 states have call successors, (210) Word has length 690 [2023-11-06 23:06:30,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:06:31,281 INFO L225 Difference]: With dead ends: 142801 [2023-11-06 23:06:31,281 INFO L226 Difference]: Without dead ends: 126131 [2023-11-06 23:06:31,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1470 GetRequests, 1362 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4447 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2810, Invalid=9180, Unknown=0, NotChecked=0, Total=11990 [2023-11-06 23:06:31,354 INFO L413 NwaCegarLoop]: 758 mSDtfsCounter, 11373 mSDsluCounter, 10760 mSDsCounter, 0 mSdLazyCounter, 7184 mSolverCounterSat, 3358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11448 SdHoareTripleChecker+Valid, 11518 SdHoareTripleChecker+Invalid, 10542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3358 IncrementalHoareTripleChecker+Valid, 7184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:06:31,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11448 Valid, 11518 Invalid, 10542 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3358 Valid, 7184 Invalid, 0 Unknown, 0 Unchecked, 10.3s Time] [2023-11-06 23:06:31,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126131 states. [2023-11-06 23:06:45,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126131 to 58693. [2023-11-06 23:06:45,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58693 states, 47132 states have (on average 1.5936094373249596) internal successors, (75110), 47384 states have internal predecessors, (75110), 10308 states have call successors, (10308), 1252 states have call predecessors, (10308), 1252 states have return successors, (10308), 10056 states have call predecessors, (10308), 10308 states have call successors, (10308) [2023-11-06 23:06:45,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58693 states to 58693 states and 95726 transitions. [2023-11-06 23:06:45,362 INFO L78 Accepts]: Start accepts. Automaton has 58693 states and 95726 transitions. Word has length 690 [2023-11-06 23:06:45,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:06:45,363 INFO L495 AbstractCegarLoop]: Abstraction has 58693 states and 95726 transitions. [2023-11-06 23:06:45,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 11.814814814814815) internal successors, (319), 26 states have internal predecessors, (319), 10 states have call successors, (210), 6 states have call predecessors, (210), 11 states have return successors, (210), 10 states have call predecessors, (210), 10 states have call successors, (210) [2023-11-06 23:06:45,363 INFO L276 IsEmpty]: Start isEmpty. Operand 58693 states and 95726 transitions. [2023-11-06 23:06:45,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 692 [2023-11-06 23:06:45,407 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:06:45,408 INFO L195 NwaCegarLoop]: trace histogram [105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:06:45,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 23:06:45,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 23:06:45,620 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:06:45,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:45,620 INFO L85 PathProgramCache]: Analyzing trace with hash -2141284311, now seen corresponding path program 1 times [2023-11-06 23:06:45,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:45,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479815446] [2023-11-06 23:06:45,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:45,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:45,703 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:06:45,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [36944265] [2023-11-06 23:06:45,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:45,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:45,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:45,705 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:45,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be311bcf-3579-4e13-9523-4a92930a7424/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 23:06:46,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:46,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 1656 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:06:46,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:47,023 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 11018 proven. 159 refuted. 0 times theorem prover too weak. 10663 trivial. 0 not checked. [2023-11-06 23:06:47,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:06:47,550 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 153 proven. 159 refuted. 0 times theorem prover too weak. 21528 trivial. 0 not checked. [2023-11-06 23:06:47,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:47,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479815446] [2023-11-06 23:06:47,551 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:06:47,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36944265] [2023-11-06 23:06:47,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36944265] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:06:47,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:06:47,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 23:06:47,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199679323] [2023-11-06 23:06:47,553 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:06:47,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:06:47,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:47,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:06:47,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:06:47,557 INFO L87 Difference]: Start difference. First operand 58693 states and 95726 transitions. Second operand has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 7 states have internal predecessors, (178), 2 states have call successors, (158), 2 states have call predecessors, (158), 4 states have return successors, (159), 2 states have call predecessors, (159), 2 states have call successors, (159)