./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-61.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/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_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-61.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/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_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/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 daf22da9b7e50e3668f3d2614a09dc89eb6381d258696004a4678815dde8cbcc --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:06:10,654 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:06:10,788 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:06:10,798 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:06:10,799 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:06:10,828 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:06:10,829 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:06:10,830 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:06:10,831 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:06:10,837 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:06:10,839 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:06:10,839 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:06:10,840 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:06:10,842 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:06:10,842 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:06:10,843 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:06:10,843 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:06:10,844 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:06:10,844 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:06:10,845 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:06:10,845 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:06:10,846 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:06:10,847 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:06:10,847 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:06:10,848 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:06:10,848 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:06:10,849 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:06:10,849 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:06:10,850 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:06:10,850 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:06:10,851 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:06:10,851 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:06:10,852 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:06:10,852 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:06:10,852 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:06:10,852 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:06:10,853 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:06:10,853 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:06:10,853 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:06:10,854 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_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> daf22da9b7e50e3668f3d2614a09dc89eb6381d258696004a4678815dde8cbcc [2023-11-06 22:06:11,136 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:06:11,171 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:06:11,174 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:06:11,176 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:06:11,176 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:06:11,178 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-61.i [2023-11-06 22:06:14,493 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:06:14,848 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:06:14,852 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-61.i [2023-11-06 22:06:14,866 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/data/a5b4e21f5/82c70be0c43c4c5c92fd434b2e551cb1/FLAG13345516a [2023-11-06 22:06:14,881 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/data/a5b4e21f5/82c70be0c43c4c5c92fd434b2e551cb1 [2023-11-06 22:06:14,884 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:06:14,886 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:06:14,888 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:06:14,888 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:06:14,901 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:06:14,905 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:06:14" (1/1) ... [2023-11-06 22:06:14,906 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2afcd9d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:14, skipping insertion in model container [2023-11-06 22:06:14,907 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:06:14" (1/1) ... [2023-11-06 22:06:14,983 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:06:15,170 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_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-61.i[916,929] [2023-11-06 22:06:15,309 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:06:15,327 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:06:15,340 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_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-61.i[916,929] [2023-11-06 22:06:15,449 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:06:15,498 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:06:15,499 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:15 WrapperNode [2023-11-06 22:06:15,500 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:06:15,501 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:06:15,502 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:06:15,507 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:06:15,515 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:15" (1/1) ... [2023-11-06 22:06:15,541 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:15" (1/1) ... [2023-11-06 22:06:15,618 INFO L138 Inliner]: procedures = 26, calls = 84, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 527 [2023-11-06 22:06:15,619 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:06:15,620 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:06:15,620 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:06:15,620 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:06:15,632 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:15" (1/1) ... [2023-11-06 22:06:15,633 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:15" (1/1) ... [2023-11-06 22:06:15,640 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:15" (1/1) ... [2023-11-06 22:06:15,641 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:15" (1/1) ... [2023-11-06 22:06:15,671 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:15" (1/1) ... [2023-11-06 22:06:15,680 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:15" (1/1) ... [2023-11-06 22:06:15,688 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:15" (1/1) ... [2023-11-06 22:06:15,693 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:15" (1/1) ... [2023-11-06 22:06:15,704 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:06:15,705 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:06:15,706 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:06:15,706 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:06:15,707 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:15" (1/1) ... [2023-11-06 22:06:15,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:06:15,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:15,749 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:06:15,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:06:15,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:06:15,801 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 22:06:15,801 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 22:06:15,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:06:15,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:06:15,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:06:15,966 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:06:15,969 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:06:17,007 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:06:17,017 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:06:17,017 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 22:06:17,020 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:06:17 BoogieIcfgContainer [2023-11-06 22:06:17,020 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:06:17,023 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:06:17,023 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:06:17,026 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:06:17,027 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:06:14" (1/3) ... [2023-11-06 22:06:17,028 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6acf4b0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:06:17, skipping insertion in model container [2023-11-06 22:06:17,028 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:15" (2/3) ... [2023-11-06 22:06:17,028 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6acf4b0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:06:17, skipping insertion in model container [2023-11-06 22:06:17,029 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:06:17" (3/3) ... [2023-11-06 22:06:17,030 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-250_file-61.i [2023-11-06 22:06:17,050 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:06:17,051 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:06:17,118 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:06:17,124 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;@2cac7f50, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:06:17,125 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:06:17,131 INFO L276 IsEmpty]: Start isEmpty. Operand has 218 states, 144 states have (on average 1.5902777777777777) internal successors, (229), 145 states have internal predecessors, (229), 71 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2023-11-06 22:06:17,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2023-11-06 22:06:17,160 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:17,161 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:06:17,162 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:17,167 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:17,168 INFO L85 PathProgramCache]: Analyzing trace with hash 932788159, now seen corresponding path program 1 times [2023-11-06 22:06:17,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:17,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510041821] [2023-11-06 22:06:17,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:17,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:17,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:17,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:17,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510041821] [2023-11-06 22:06:17,603 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:06:17,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319134775] [2023-11-06 22:06:17,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:17,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:17,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:17,608 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:17,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:06:18,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:18,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 1080 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 22:06:18,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:18,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 9800 trivial. 0 not checked. [2023-11-06 22:06:18,262 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:06:18,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319134775] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:06:18,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:06:18,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:06:18,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895291126] [2023-11-06 22:06:18,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:06:18,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:06:18,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:18,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:06:18,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:06:18,320 INFO L87 Difference]: Start difference. First operand has 218 states, 144 states have (on average 1.5902777777777777) internal successors, (229), 145 states have internal predecessors, (229), 71 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) Second operand has 2 states, 2 states have (on average 51.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (71), 2 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 2 states have call successors, (71) [2023-11-06 22:06:18,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:18,387 INFO L93 Difference]: Finished difference Result 429 states and 807 transitions. [2023-11-06 22:06:18,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:06:18,390 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 51.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (71), 2 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 2 states have call successors, (71) Word has length 452 [2023-11-06 22:06:18,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:18,411 INFO L225 Difference]: With dead ends: 429 [2023-11-06 22:06:18,412 INFO L226 Difference]: Without dead ends: 214 [2023-11-06 22:06:18,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 451 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 22:06:18,423 INFO L413 NwaCegarLoop]: 362 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, 362 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 22:06:18,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:06:18,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2023-11-06 22:06:18,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2023-11-06 22:06:18,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 141 states have (on average 1.5602836879432624) internal successors, (220), 141 states have internal predecessors, (220), 71 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2023-11-06 22:06:18,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 362 transitions. [2023-11-06 22:06:18,568 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 362 transitions. Word has length 452 [2023-11-06 22:06:18,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:18,571 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 362 transitions. [2023-11-06 22:06:18,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 51.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (71), 2 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 2 states have call successors, (71) [2023-11-06 22:06:18,572 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 362 transitions. [2023-11-06 22:06:18,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2023-11-06 22:06:18,597 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:18,598 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:06:18,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:06:18,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 22:06:18,806 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:18,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:18,809 INFO L85 PathProgramCache]: Analyzing trace with hash 2140836653, now seen corresponding path program 1 times [2023-11-06 22:06:18,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:18,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596281279] [2023-11-06 22:06:18,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:18,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:19,011 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:06:19,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1191960518] [2023-11-06 22:06:19,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:19,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:19,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:19,014 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:19,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:06:19,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:19,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 1080 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:06:19,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:19,536 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9940 trivial. 0 not checked. [2023-11-06 22:06:19,536 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:06:19,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:19,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596281279] [2023-11-06 22:06:19,537 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:06:19,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191960518] [2023-11-06 22:06:19,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191960518] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:06:19,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:06:19,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:06:19,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647207457] [2023-11-06 22:06:19,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:06:19,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:06:19,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:19,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:06:19,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:06:19,545 INFO L87 Difference]: Start difference. First operand 214 states and 362 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-06 22:06:19,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:19,607 INFO L93 Difference]: Finished difference Result 425 states and 721 transitions. [2023-11-06 22:06:19,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:06:19,609 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) Word has length 452 [2023-11-06 22:06:19,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:19,616 INFO L225 Difference]: With dead ends: 425 [2023-11-06 22:06:19,617 INFO L226 Difference]: Without dead ends: 214 [2023-11-06 22:06:19,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 450 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 22:06:19,622 INFO L413 NwaCegarLoop]: 360 mSDtfsCounter, 31 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:06:19,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 685 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:06:19,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2023-11-06 22:06:19,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2023-11-06 22:06:19,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 141 states have (on average 1.553191489361702) internal successors, (219), 141 states have internal predecessors, (219), 71 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2023-11-06 22:06:19,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 361 transitions. [2023-11-06 22:06:19,657 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 361 transitions. Word has length 452 [2023-11-06 22:06:19,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:19,661 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 361 transitions. [2023-11-06 22:06:19,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-06 22:06:19,662 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 361 transitions. [2023-11-06 22:06:19,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2023-11-06 22:06:19,668 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:19,668 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:06:19,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-06 22:06:19,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:19,876 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:19,878 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:19,879 INFO L85 PathProgramCache]: Analyzing trace with hash 451892911, now seen corresponding path program 1 times [2023-11-06 22:06:19,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:19,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561674869] [2023-11-06 22:06:19,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:19,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:20,069 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:06:20,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1719710002] [2023-11-06 22:06:20,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:20,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:20,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:20,077 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:20,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:06:20,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:20,491 INFO L262 TraceCheckSpWp]: Trace formula consists of 1078 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:06:20,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:20,644 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9940 trivial. 0 not checked. [2023-11-06 22:06:20,644 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:06:20,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:20,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561674869] [2023-11-06 22:06:20,645 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:06:20,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719710002] [2023-11-06 22:06:20,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719710002] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:06:20,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:06:20,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:06:20,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835768814] [2023-11-06 22:06:20,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:06:20,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:06:20,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:20,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:06:20,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:06:20,650 INFO L87 Difference]: Start difference. First operand 214 states and 361 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-06 22:06:20,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:20,751 INFO L93 Difference]: Finished difference Result 559 states and 946 transitions. [2023-11-06 22:06:20,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:06:20,752 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) Word has length 452 [2023-11-06 22:06:20,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:20,759 INFO L225 Difference]: With dead ends: 559 [2023-11-06 22:06:20,759 INFO L226 Difference]: Without dead ends: 348 [2023-11-06 22:06:20,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 450 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 22:06:20,762 INFO L413 NwaCegarLoop]: 420 mSDtfsCounter, 211 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:06:20,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 761 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:06:20,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2023-11-06 22:06:20,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 345. [2023-11-06 22:06:20,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 239 states have (on average 1.5857740585774058) internal successors, (379), 240 states have internal predecessors, (379), 103 states have call successors, (103), 2 states have call predecessors, (103), 2 states have return successors, (103), 102 states have call predecessors, (103), 103 states have call successors, (103) [2023-11-06 22:06:20,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 585 transitions. [2023-11-06 22:06:20,832 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 585 transitions. Word has length 452 [2023-11-06 22:06:20,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:20,838 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 585 transitions. [2023-11-06 22:06:20,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-06 22:06:20,839 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 585 transitions. [2023-11-06 22:06:20,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2023-11-06 22:06:20,847 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:20,848 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:06:20,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:06:21,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:21,056 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:21,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:21,056 INFO L85 PathProgramCache]: Analyzing trace with hash 373564143, now seen corresponding path program 1 times [2023-11-06 22:06:21,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:21,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177359965] [2023-11-06 22:06:21,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:21,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:21,156 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:06:21,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1436765365] [2023-11-06 22:06:21,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:21,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:21,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:21,158 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:21,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:06:21,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:21,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 1074 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:06:21,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:21,658 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9940 trivial. 0 not checked. [2023-11-06 22:06:21,659 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:06:21,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:21,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177359965] [2023-11-06 22:06:21,660 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:06:21,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436765365] [2023-11-06 22:06:21,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436765365] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:06:21,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:06:21,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:06:21,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027536158] [2023-11-06 22:06:21,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:06:21,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:06:21,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:21,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:06:21,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:06:21,668 INFO L87 Difference]: Start difference. First operand 345 states and 585 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-06 22:06:21,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:21,775 INFO L93 Difference]: Finished difference Result 956 states and 1624 transitions. [2023-11-06 22:06:21,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:06:21,775 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) Word has length 452 [2023-11-06 22:06:21,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:21,787 INFO L225 Difference]: With dead ends: 956 [2023-11-06 22:06:21,787 INFO L226 Difference]: Without dead ends: 614 [2023-11-06 22:06:21,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 450 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 22:06:21,795 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 220 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:06:21,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 684 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:06:21,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2023-11-06 22:06:21,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 611. [2023-11-06 22:06:21,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 435 states have (on average 1.5770114942528735) internal successors, (686), 438 states have internal predecessors, (686), 171 states have call successors, (171), 4 states have call predecessors, (171), 4 states have return successors, (171), 168 states have call predecessors, (171), 171 states have call successors, (171) [2023-11-06 22:06:21,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 1028 transitions. [2023-11-06 22:06:21,883 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 1028 transitions. Word has length 452 [2023-11-06 22:06:21,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:21,885 INFO L495 AbstractCegarLoop]: Abstraction has 611 states and 1028 transitions. [2023-11-06 22:06:21,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-06 22:06:21,886 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 1028 transitions. [2023-11-06 22:06:21,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2023-11-06 22:06:21,891 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:21,891 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:06:21,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:06:22,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:22,100 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:22,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:22,101 INFO L85 PathProgramCache]: Analyzing trace with hash -42309394, now seen corresponding path program 1 times [2023-11-06 22:06:22,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:22,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485042091] [2023-11-06 22:06:22,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:22,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:22,200 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:06:22,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [138373507] [2023-11-06 22:06:22,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:22,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:22,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:22,203 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:22,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:06:22,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:22,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 1073 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:06:22,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:22,763 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9940 trivial. 0 not checked. [2023-11-06 22:06:22,763 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:06:22,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:22,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485042091] [2023-11-06 22:06:22,764 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:06:22,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138373507] [2023-11-06 22:06:22,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138373507] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:06:22,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:06:22,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:06:22,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183130699] [2023-11-06 22:06:22,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:06:22,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:06:22,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:22,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:06:22,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:06:22,776 INFO L87 Difference]: Start difference. First operand 611 states and 1028 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-06 22:06:22,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:22,941 INFO L93 Difference]: Finished difference Result 1843 states and 3110 transitions. [2023-11-06 22:06:22,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:06:22,941 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) Word has length 453 [2023-11-06 22:06:22,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:22,953 INFO L225 Difference]: With dead ends: 1843 [2023-11-06 22:06:22,953 INFO L226 Difference]: Without dead ends: 1235 [2023-11-06 22:06:22,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:06:22,956 INFO L413 NwaCegarLoop]: 558 mSDtfsCounter, 354 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 1460 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:06:22,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 1460 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:06:22,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1235 states. [2023-11-06 22:06:23,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1235 to 1221. [2023-11-06 22:06:23,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 870 states have (on average 1.5770114942528735) internal successors, (1372), 876 states have internal predecessors, (1372), 342 states have call successors, (342), 8 states have call predecessors, (342), 8 states have return successors, (342), 336 states have call predecessors, (342), 342 states have call successors, (342) [2023-11-06 22:06:23,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 2056 transitions. [2023-11-06 22:06:23,212 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 2056 transitions. Word has length 453 [2023-11-06 22:06:23,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:23,214 INFO L495 AbstractCegarLoop]: Abstraction has 1221 states and 2056 transitions. [2023-11-06 22:06:23,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-06 22:06:23,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 2056 transitions. [2023-11-06 22:06:23,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2023-11-06 22:06:23,219 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:23,220 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:06:23,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:06:23,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:23,428 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:23,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:23,428 INFO L85 PathProgramCache]: Analyzing trace with hash 617222128, now seen corresponding path program 1 times [2023-11-06 22:06:23,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:23,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645392336] [2023-11-06 22:06:23,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:23,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:23,498 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:06:23,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [794304889] [2023-11-06 22:06:23,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:23,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:23,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:23,500 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:23,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:06:23,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:23,912 INFO L262 TraceCheckSpWp]: Trace formula consists of 1073 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:06:23,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:25,736 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 2688 proven. 177 refuted. 0 times theorem prover too weak. 7075 trivial. 0 not checked. [2023-11-06 22:06:25,736 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:06:26,193 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9940 trivial. 0 not checked. [2023-11-06 22:06:26,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:26,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645392336] [2023-11-06 22:06:26,194 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:06:26,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794304889] [2023-11-06 22:06:26,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794304889] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:06:26,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:06:26,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2023-11-06 22:06:26,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283673029] [2023-11-06 22:06:26,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:06:26,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:06:26,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:26,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:06:26,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:06:26,198 INFO L87 Difference]: Start difference. First operand 1221 states and 2056 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-06 22:06:26,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:26,995 INFO L93 Difference]: Finished difference Result 6021 states and 10140 transitions. [2023-11-06 22:06:26,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:06:26,996 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) Word has length 453 [2023-11-06 22:06:26,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:27,035 INFO L225 Difference]: With dead ends: 6021 [2023-11-06 22:06:27,035 INFO L226 Difference]: Without dead ends: 4803 [2023-11-06 22:06:27,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 906 GetRequests, 899 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:06:27,044 INFO L413 NwaCegarLoop]: 721 mSDtfsCounter, 768 mSDsluCounter, 1049 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 1770 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:06:27,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [768 Valid, 1770 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:06:27,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4803 states. [2023-11-06 22:06:27,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4803 to 2433. [2023-11-06 22:06:27,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2433 states, 1732 states have (on average 1.5681293302540416) internal successors, (2716), 1744 states have internal predecessors, (2716), 684 states have call successors, (684), 16 states have call predecessors, (684), 16 states have return successors, (684), 672 states have call predecessors, (684), 684 states have call successors, (684) [2023-11-06 22:06:27,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2433 states to 2433 states and 4084 transitions. [2023-11-06 22:06:27,660 INFO L78 Accepts]: Start accepts. Automaton has 2433 states and 4084 transitions. Word has length 453 [2023-11-06 22:06:27,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:27,661 INFO L495 AbstractCegarLoop]: Abstraction has 2433 states and 4084 transitions. [2023-11-06 22:06:27,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-06 22:06:27,662 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states and 4084 transitions. [2023-11-06 22:06:27,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2023-11-06 22:06:27,667 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:27,668 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:06:27,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:06:27,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 22:06:27,887 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:27,887 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:27,887 INFO L85 PathProgramCache]: Analyzing trace with hash -412137170, now seen corresponding path program 1 times [2023-11-06 22:06:27,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:27,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116735661] [2023-11-06 22:06:27,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:27,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:27,964 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:06:27,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [103557468] [2023-11-06 22:06:27,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:27,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:27,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:27,966 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:27,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:06:28,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:28,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 1070 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:06:28,363 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:28,498 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9940 trivial. 0 not checked. [2023-11-06 22:06:28,498 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:06:28,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:28,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116735661] [2023-11-06 22:06:28,498 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:06:28,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103557468] [2023-11-06 22:06:28,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103557468] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:06:28,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:06:28,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:06:28,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060790112] [2023-11-06 22:06:28,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:06:28,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:06:28,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:28,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:06:28,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:06:28,502 INFO L87 Difference]: Start difference. First operand 2433 states and 4084 transitions. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-06 22:06:29,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:29,832 INFO L93 Difference]: Finished difference Result 7503 states and 12571 transitions. [2023-11-06 22:06:29,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:06:29,833 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) Word has length 453 [2023-11-06 22:06:29,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:29,873 INFO L225 Difference]: With dead ends: 7503 [2023-11-06 22:06:29,873 INFO L226 Difference]: Without dead ends: 5073 [2023-11-06 22:06:29,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:06:29,885 INFO L413 NwaCegarLoop]: 414 mSDtfsCounter, 953 mSDsluCounter, 1245 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 953 SdHoareTripleChecker+Valid, 1659 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 22:06:29,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [953 Valid, 1659 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 22:06:29,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5073 states. [2023-11-06 22:06:30,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5073 to 4631. [2023-11-06 22:06:30,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4631 states, 3362 states have (on average 1.5710886377156454) internal successors, (5282), 3390 states have internal predecessors, (5282), 1236 states have call successors, (1236), 32 states have call predecessors, (1236), 32 states have return successors, (1236), 1208 states have call predecessors, (1236), 1236 states have call successors, (1236) [2023-11-06 22:06:30,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4631 states to 4631 states and 7754 transitions. [2023-11-06 22:06:30,616 INFO L78 Accepts]: Start accepts. Automaton has 4631 states and 7754 transitions. Word has length 453 [2023-11-06 22:06:30,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:30,617 INFO L495 AbstractCegarLoop]: Abstraction has 4631 states and 7754 transitions. [2023-11-06 22:06:30,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-06 22:06:30,618 INFO L276 IsEmpty]: Start isEmpty. Operand 4631 states and 7754 transitions. [2023-11-06 22:06:30,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2023-11-06 22:06:30,629 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:30,629 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:06:30,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:06:30,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 22:06:30,838 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:30,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:30,839 INFO L85 PathProgramCache]: Analyzing trace with hash 2144310042, now seen corresponding path program 1 times [2023-11-06 22:06:30,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:30,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499457784] [2023-11-06 22:06:30,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:30,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:30,925 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:06:30,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2039219474] [2023-11-06 22:06:30,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:30,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:30,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:30,928 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:30,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:06:31,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:31,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 1073 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:06:31,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:32,107 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9940 trivial. 0 not checked. [2023-11-06 22:06:32,108 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:06:32,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:32,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499457784] [2023-11-06 22:06:32,108 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:06:32,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039219474] [2023-11-06 22:06:32,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039219474] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:06:32,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:06:32,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:06:32,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970628085] [2023-11-06 22:06:32,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:06:32,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:06:32,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:32,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:06:32,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:06:32,112 INFO L87 Difference]: Start difference. First operand 4631 states and 7754 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 3 states have internal predecessors, (102), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-06 22:06:33,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:33,067 INFO L93 Difference]: Finished difference Result 11563 states and 19343 transitions. [2023-11-06 22:06:33,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:06:33,068 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 3 states have internal predecessors, (102), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) Word has length 454 [2023-11-06 22:06:33,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:33,124 INFO L225 Difference]: With dead ends: 11563 [2023-11-06 22:06:33,124 INFO L226 Difference]: Without dead ends: 6935 [2023-11-06 22:06:33,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 451 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 22:06:33,143 INFO L413 NwaCegarLoop]: 359 mSDtfsCounter, 372 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 1109 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:06:33,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 1109 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:06:33,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6935 states. [2023-11-06 22:06:34,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6935 to 6923. [2023-11-06 22:06:34,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6923 states, 5020 states have (on average 1.5661354581673306) internal successors, (7862), 5062 states have internal predecessors, (7862), 1854 states have call successors, (1854), 48 states have call predecessors, (1854), 48 states have return successors, (1854), 1812 states have call predecessors, (1854), 1854 states have call successors, (1854) [2023-11-06 22:06:34,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6923 states to 6923 states and 11570 transitions. [2023-11-06 22:06:34,125 INFO L78 Accepts]: Start accepts. Automaton has 6923 states and 11570 transitions. Word has length 454 [2023-11-06 22:06:34,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:34,126 INFO L495 AbstractCegarLoop]: Abstraction has 6923 states and 11570 transitions. [2023-11-06 22:06:34,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 3 states have internal predecessors, (102), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-06 22:06:34,127 INFO L276 IsEmpty]: Start isEmpty. Operand 6923 states and 11570 transitions. [2023-11-06 22:06:34,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2023-11-06 22:06:34,137 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:34,138 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:06:34,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:06:34,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:34,391 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:34,391 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:34,392 INFO L85 PathProgramCache]: Analyzing trace with hash -309896969, now seen corresponding path program 1 times [2023-11-06 22:06:34,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:34,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004714745] [2023-11-06 22:06:34,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:34,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:34,479 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:06:34,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2039071944] [2023-11-06 22:06:34,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:34,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:34,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:34,485 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:34,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:06:35,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:35,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 1073 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:06:35,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:37,783 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 6200 proven. 240 refuted. 0 times theorem prover too weak. 3500 trivial. 0 not checked. [2023-11-06 22:06:37,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:06:39,753 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 174 proven. 243 refuted. 0 times theorem prover too weak. 9523 trivial. 0 not checked. [2023-11-06 22:06:39,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:39,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004714745] [2023-11-06 22:06:39,754 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:06:39,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039071944] [2023-11-06 22:06:39,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039071944] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:06:39,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:06:39,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-11-06 22:06:39,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034226345] [2023-11-06 22:06:39,756 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:06:39,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:06:39,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:39,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:06:39,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:06:39,759 INFO L87 Difference]: Start difference. First operand 6923 states and 11570 transitions. Second operand has 16 states, 15 states have (on average 10.2) internal successors, (153), 16 states have internal predecessors, (153), 7 states have call successors, (120), 4 states have call predecessors, (120), 8 states have return successors, (120), 7 states have call predecessors, (120), 7 states have call successors, (120) [2023-11-06 22:06:43,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:43,078 INFO L93 Difference]: Finished difference Result 14515 states and 23713 transitions. [2023-11-06 22:06:43,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:06:43,080 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 10.2) internal successors, (153), 16 states have internal predecessors, (153), 7 states have call successors, (120), 4 states have call predecessors, (120), 8 states have return successors, (120), 7 states have call predecessors, (120), 7 states have call successors, (120) Word has length 454 [2023-11-06 22:06:43,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:43,152 INFO L225 Difference]: With dead ends: 14515 [2023-11-06 22:06:43,152 INFO L226 Difference]: Without dead ends: 7595 [2023-11-06 22:06:43,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 915 GetRequests, 893 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=195, Invalid=357, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:06:43,187 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 1141 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1163 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:06:43,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1163 Valid, 816 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-06 22:06:43,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7595 states. [2023-11-06 22:06:44,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7595 to 5831. [2023-11-06 22:06:44,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5831 states, 4444 states have (on average 1.576057605760576) internal successors, (7004), 4474 states have internal predecessors, (7004), 1302 states have call successors, (1302), 84 states have call predecessors, (1302), 84 states have return successors, (1302), 1272 states have call predecessors, (1302), 1302 states have call successors, (1302) [2023-11-06 22:06:44,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5831 states to 5831 states and 9608 transitions. [2023-11-06 22:06:44,305 INFO L78 Accepts]: Start accepts. Automaton has 5831 states and 9608 transitions. Word has length 454 [2023-11-06 22:06:44,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:44,306 INFO L495 AbstractCegarLoop]: Abstraction has 5831 states and 9608 transitions. [2023-11-06 22:06:44,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 10.2) internal successors, (153), 16 states have internal predecessors, (153), 7 states have call successors, (120), 4 states have call predecessors, (120), 8 states have return successors, (120), 7 states have call predecessors, (120), 7 states have call successors, (120) [2023-11-06 22:06:44,307 INFO L276 IsEmpty]: Start isEmpty. Operand 5831 states and 9608 transitions. [2023-11-06 22:06:44,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2023-11-06 22:06:44,317 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:44,317 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:06:44,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:06:44,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:44,534 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:44,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:44,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1076888441, now seen corresponding path program 1 times [2023-11-06 22:06:44,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:44,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323121379] [2023-11-06 22:06:44,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:44,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:44,603 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:06:44,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1856038805] [2023-11-06 22:06:44,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:44,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:44,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:44,605 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:44,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:06:45,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:45,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 1071 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:06:45,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:45,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9940 trivial. 0 not checked. [2023-11-06 22:06:45,127 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:06:45,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:45,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323121379] [2023-11-06 22:06:45,128 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:06:45,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856038805] [2023-11-06 22:06:45,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856038805] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:06:45,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:06:45,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:06:45,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390675299] [2023-11-06 22:06:45,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:06:45,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:06:45,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:45,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:06:45,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:06:45,133 INFO L87 Difference]: Start difference. First operand 5831 states and 9608 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-06 22:06:45,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:45,811 INFO L93 Difference]: Finished difference Result 11803 states and 19477 transitions. [2023-11-06 22:06:45,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:06:45,811 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) Word has length 454 [2023-11-06 22:06:45,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:45,833 INFO L225 Difference]: With dead ends: 11803 [2023-11-06 22:06:45,833 INFO L226 Difference]: Without dead ends: 5975 [2023-11-06 22:06:45,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 451 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:06:45,851 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 3 mSDsluCounter, 696 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1051 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:06:45,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1051 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:06:45,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5975 states. [2023-11-06 22:06:46,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5975 to 5951. [2023-11-06 22:06:46,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5951 states, 4564 states have (on average 1.5661700262927256) internal successors, (7148), 4594 states have internal predecessors, (7148), 1302 states have call successors, (1302), 84 states have call predecessors, (1302), 84 states have return successors, (1302), 1272 states have call predecessors, (1302), 1302 states have call successors, (1302) [2023-11-06 22:06:46,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5951 states to 5951 states and 9752 transitions. [2023-11-06 22:06:46,716 INFO L78 Accepts]: Start accepts. Automaton has 5951 states and 9752 transitions. Word has length 454 [2023-11-06 22:06:46,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:46,717 INFO L495 AbstractCegarLoop]: Abstraction has 5951 states and 9752 transitions. [2023-11-06 22:06:46,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-06 22:06:46,717 INFO L276 IsEmpty]: Start isEmpty. Operand 5951 states and 9752 transitions. [2023-11-06 22:06:46,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2023-11-06 22:06:46,727 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:46,727 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:06:46,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:06:46,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:06:46,935 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:46,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:46,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1092932491, now seen corresponding path program 1 times [2023-11-06 22:06:46,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:46,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007929816] [2023-11-06 22:06:46,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:46,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:46,998 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:06:46,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [904016178] [2023-11-06 22:06:46,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:46,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:46,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:47,000 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:47,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:06:47,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:47,512 INFO L262 TraceCheckSpWp]: Trace formula consists of 1076 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:06:47,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:48,172 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9940 trivial. 0 not checked. [2023-11-06 22:06:48,172 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:06:48,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:48,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007929816] [2023-11-06 22:06:48,173 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:06:48,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904016178] [2023-11-06 22:06:48,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904016178] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:06:48,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:06:48,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:06:48,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181203683] [2023-11-06 22:06:48,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:06:48,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:06:48,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:48,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:06:48,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:06:48,177 INFO L87 Difference]: Start difference. First operand 5951 states and 9752 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 3 states have internal predecessors, (103), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-06 22:06:49,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:49,136 INFO L93 Difference]: Finished difference Result 11899 states and 19501 transitions. [2023-11-06 22:06:49,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:06:49,137 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 3 states have internal predecessors, (103), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) Word has length 455 [2023-11-06 22:06:49,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:49,161 INFO L225 Difference]: With dead ends: 11899 [2023-11-06 22:06:49,161 INFO L226 Difference]: Without dead ends: 5951 [2023-11-06 22:06:49,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 452 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 22:06:49,183 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 127 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:06:49,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 535 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:06:49,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5951 states. [2023-11-06 22:06:50,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5951 to 5951. [2023-11-06 22:06:50,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5951 states, 4564 states have (on average 1.5582822085889572) internal successors, (7112), 4594 states have internal predecessors, (7112), 1302 states have call successors, (1302), 84 states have call predecessors, (1302), 84 states have return successors, (1302), 1272 states have call predecessors, (1302), 1302 states have call successors, (1302) [2023-11-06 22:06:50,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5951 states to 5951 states and 9716 transitions. [2023-11-06 22:06:50,144 INFO L78 Accepts]: Start accepts. Automaton has 5951 states and 9716 transitions. Word has length 455 [2023-11-06 22:06:50,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:50,146 INFO L495 AbstractCegarLoop]: Abstraction has 5951 states and 9716 transitions. [2023-11-06 22:06:50,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 3 states have internal predecessors, (103), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-06 22:06:50,146 INFO L276 IsEmpty]: Start isEmpty. Operand 5951 states and 9716 transitions. [2023-11-06 22:06:50,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2023-11-06 22:06:50,158 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:50,159 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:06:50,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:06:50,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:50,377 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:50,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:50,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1922171127, now seen corresponding path program 1 times [2023-11-06 22:06:50,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:50,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478701281] [2023-11-06 22:06:50,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:50,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:50,440 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:06:50,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1949634201] [2023-11-06 22:06:50,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:50,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:50,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:50,442 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:50,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:06:51,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:51,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 1074 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:06:51,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:51,831 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9940 trivial. 0 not checked. [2023-11-06 22:06:51,832 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:06:51,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:51,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478701281] [2023-11-06 22:06:51,832 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:06:51,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949634201] [2023-11-06 22:06:51,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949634201] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:06:51,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:06:51,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:06:51,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243193197] [2023-11-06 22:06:51,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:06:51,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:06:51,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:51,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:06:51,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:06:51,836 INFO L87 Difference]: Start difference. First operand 5951 states and 9716 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 3 states have internal predecessors, (103), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-06 22:06:53,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:53,286 INFO L93 Difference]: Finished difference Result 17811 states and 29070 transitions. [2023-11-06 22:06:53,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:06:53,287 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 3 states have internal predecessors, (103), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) Word has length 455 [2023-11-06 22:06:53,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:53,333 INFO L225 Difference]: With dead ends: 17811 [2023-11-06 22:06:53,334 INFO L226 Difference]: Without dead ends: 11863 [2023-11-06 22:06:53,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 452 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:06:53,349 INFO L413 NwaCegarLoop]: 683 mSDtfsCounter, 337 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:06:53,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 1020 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:06:53,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11863 states. [2023-11-06 22:06:54,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11863 to 6779. [2023-11-06 22:06:54,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6779 states, 5392 states have (on average 1.545994065281899) internal successors, (8336), 5422 states have internal predecessors, (8336), 1302 states have call successors, (1302), 84 states have call predecessors, (1302), 84 states have return successors, (1302), 1272 states have call predecessors, (1302), 1302 states have call successors, (1302) [2023-11-06 22:06:54,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6779 states to 6779 states and 10940 transitions. [2023-11-06 22:06:54,433 INFO L78 Accepts]: Start accepts. Automaton has 6779 states and 10940 transitions. Word has length 455 [2023-11-06 22:06:54,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:54,434 INFO L495 AbstractCegarLoop]: Abstraction has 6779 states and 10940 transitions. [2023-11-06 22:06:54,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 3 states have internal predecessors, (103), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-06 22:06:54,434 INFO L276 IsEmpty]: Start isEmpty. Operand 6779 states and 10940 transitions. [2023-11-06 22:06:54,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2023-11-06 22:06:54,448 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:54,448 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:06:54,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:06:54,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:54,658 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:54,658 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:54,658 INFO L85 PathProgramCache]: Analyzing trace with hash 333823225, now seen corresponding path program 1 times [2023-11-06 22:06:54,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:54,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658129383] [2023-11-06 22:06:54,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:54,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:54,723 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:06:54,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [967485062] [2023-11-06 22:06:54,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:54,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:54,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:54,725 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:54,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:06:55,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:55,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 1073 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:06:55,127 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:55,193 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9940 trivial. 0 not checked. [2023-11-06 22:06:55,193 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:06:55,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:55,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658129383] [2023-11-06 22:06:55,195 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:06:55,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967485062] [2023-11-06 22:06:55,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967485062] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:06:55,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:06:55,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:06:55,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356328296] [2023-11-06 22:06:55,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:06:55,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:06:55,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:55,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:06:55,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:06:55,198 INFO L87 Difference]: Start difference. First operand 6779 states and 10940 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-06 22:06:56,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:56,581 INFO L93 Difference]: Finished difference Result 18639 states and 30150 transitions. [2023-11-06 22:06:56,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:06:56,582 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) Word has length 455 [2023-11-06 22:06:56,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:56,621 INFO L225 Difference]: With dead ends: 18639 [2023-11-06 22:06:56,622 INFO L226 Difference]: Without dead ends: 11863 [2023-11-06 22:06:56,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 452 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:06:56,637 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 363 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 1029 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:06:56,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [363 Valid, 1029 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:06:56,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11863 states. [2023-11-06 22:06:58,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11863 to 6779. [2023-11-06 22:06:58,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6779 states, 5392 states have (on average 1.5393175074183976) internal successors, (8300), 5422 states have internal predecessors, (8300), 1302 states have call successors, (1302), 84 states have call predecessors, (1302), 84 states have return successors, (1302), 1272 states have call predecessors, (1302), 1302 states have call successors, (1302) [2023-11-06 22:06:58,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6779 states to 6779 states and 10904 transitions. [2023-11-06 22:06:58,050 INFO L78 Accepts]: Start accepts. Automaton has 6779 states and 10904 transitions. Word has length 455 [2023-11-06 22:06:58,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:58,051 INFO L495 AbstractCegarLoop]: Abstraction has 6779 states and 10904 transitions. [2023-11-06 22:06:58,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-06 22:06:58,051 INFO L276 IsEmpty]: Start isEmpty. Operand 6779 states and 10904 transitions. [2023-11-06 22:06:58,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2023-11-06 22:06:58,066 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:58,066 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:06:58,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:06:58,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:58,274 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:58,275 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:58,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1676137118, now seen corresponding path program 1 times [2023-11-06 22:06:58,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:58,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774688042] [2023-11-06 22:06:58,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:58,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:58,345 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:06:58,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [946417715] [2023-11-06 22:06:58,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:58,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:58,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:58,347 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:58,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e831fcbe-39bc-44cb-9ba6-be3c8138f9fa/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:07:00,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:07:00,672 INFO L262 TraceCheckSpWp]: Trace formula consists of 1074 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-06 22:07:00,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:08:02,041 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 6956 proven. 429 refuted. 0 times theorem prover too weak. 2555 trivial. 0 not checked. [2023-11-06 22:08:02,042 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:08:06,189 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 390 proven. 231 refuted. 0 times theorem prover too weak. 9319 trivial. 0 not checked. [2023-11-06 22:08:06,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:08:06,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774688042] [2023-11-06 22:08:06,189 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:08:06,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946417715] [2023-11-06 22:08:06,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946417715] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:08:06,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:08:06,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 36 [2023-11-06 22:08:06,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644756546] [2023-11-06 22:08:06,190 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:08:06,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-06 22:08:06,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:08:06,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-06 22:08:06,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=975, Unknown=0, NotChecked=0, Total=1260 [2023-11-06 22:08:06,194 INFO L87 Difference]: Start difference. First operand 6779 states and 10904 transitions. Second operand has 36 states, 36 states have (on average 5.527777777777778) internal successors, (199), 36 states have internal predecessors, (199), 11 states have call successors, (112), 6 states have call predecessors, (112), 14 states have return successors, (113), 11 states have call predecessors, (113), 11 states have call successors, (113) [2023-11-06 22:08:22,992 WARN L293 SmtUtils]: Spent 6.40s on a formula simplification. DAG size of input: 68 DAG size of output: 62 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 22:09:27,807 WARN L293 SmtUtils]: Spent 7.04s on a formula simplification that was a NOOP. DAG size: 48 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)