./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-52.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-52.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --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 fb963e37b33825ce0294e2e8f217c8677b17169f1936b98a544da3476a4e00cd --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:25:55,884 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:25:55,952 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 00:25:55,957 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:25:55,957 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:25:55,981 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:25:55,982 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:25:55,982 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:25:55,983 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:25:55,984 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:25:55,984 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:25:55,985 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:25:55,985 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:25:55,986 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:25:55,986 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:25:55,987 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:25:55,988 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 00:25:55,988 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:25:55,989 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:25:55,989 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:25:55,990 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:25:55,992 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 00:25:55,993 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:25:55,993 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 00:25:55,993 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:25:55,994 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 00:25:55,994 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:25:55,995 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:25:55,995 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:25:55,995 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:25:55,996 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:25:55,996 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:25:55,996 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:25:55,997 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:25:55,997 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 00:25:55,997 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:25:55,997 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:25:55,997 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:25:55,997 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:25:55,998 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 00:25:55,998 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:25:55,998 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:25:55,998 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_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fb963e37b33825ce0294e2e8f217c8677b17169f1936b98a544da3476a4e00cd [2023-11-29 00:25:56,245 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:25:56,267 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:25:56,269 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:25:56,271 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:25:56,271 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:25:56,272 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-52.i [2023-11-29 00:25:59,023 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:25:59,230 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:25:59,230 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-52.i [2023-11-29 00:25:59,244 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/data/c854a6560/91ee6e8b9d074e13bea54c16f158b494/FLAGb183832d6 [2023-11-29 00:25:59,256 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/data/c854a6560/91ee6e8b9d074e13bea54c16f158b494 [2023-11-29 00:25:59,258 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:25:59,260 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:25:59,261 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:25:59,261 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:25:59,265 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:25:59,266 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:25:59" (1/1) ... [2023-11-29 00:25:59,267 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e12afc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:25:59, skipping insertion in model container [2023-11-29 00:25:59,267 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:25:59" (1/1) ... [2023-11-29 00:25:59,317 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:25:59,442 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_6e473a8e-f123-4d03-b77d-8f0aeda91136/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-52.i[916,929] [2023-11-29 00:25:59,558 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:25:59,575 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:25:59,585 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_6e473a8e-f123-4d03-b77d-8f0aeda91136/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-52.i[916,929] [2023-11-29 00:25:59,646 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:25:59,665 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:25:59,666 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:25:59 WrapperNode [2023-11-29 00:25:59,666 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:25:59,667 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:25:59,667 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:25:59,667 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:25:59,672 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:25:59" (1/1) ... [2023-11-29 00:25:59,690 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:25:59" (1/1) ... [2023-11-29 00:25:59,744 INFO L138 Inliner]: procedures = 26, calls = 86, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 541 [2023-11-29 00:25:59,744 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:25:59,745 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:25:59,745 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:25:59,745 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:25:59,757 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:25:59" (1/1) ... [2023-11-29 00:25:59,757 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:25:59" (1/1) ... [2023-11-29 00:25:59,764 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:25:59" (1/1) ... [2023-11-29 00:25:59,789 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-29 00:25:59,789 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:25:59" (1/1) ... [2023-11-29 00:25:59,790 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:25:59" (1/1) ... [2023-11-29 00:25:59,809 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:25:59" (1/1) ... [2023-11-29 00:25:59,816 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:25:59" (1/1) ... [2023-11-29 00:25:59,824 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:25:59" (1/1) ... [2023-11-29 00:25:59,829 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:25:59" (1/1) ... [2023-11-29 00:25:59,837 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:25:59,838 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:25:59,839 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:25:59,839 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:25:59,839 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:25:59" (1/1) ... [2023-11-29 00:25:59,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:25:59,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:25:59,864 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:25:59,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:25:59,896 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 00:25:59,896 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 00:25:59,897 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 00:25:59,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 00:25:59,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:25:59,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:26:00,007 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:26:00,009 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:26:00,703 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:26:00,760 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:26:00,760 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 00:26:00,761 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:26:00 BoogieIcfgContainer [2023-11-29 00:26:00,761 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:26:00,764 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:26:00,764 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:26:00,767 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:26:00,768 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:25:59" (1/3) ... [2023-11-29 00:26:00,768 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c792003 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:26:00, skipping insertion in model container [2023-11-29 00:26:00,769 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:25:59" (2/3) ... [2023-11-29 00:26:00,769 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c792003 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:26:00, skipping insertion in model container [2023-11-29 00:26:00,769 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:26:00" (3/3) ... [2023-11-29 00:26:00,770 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-250_file-52.i [2023-11-29 00:26:00,790 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:26:00,790 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 00:26:00,848 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:26:00,855 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=LoopHeads, 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;@61b0889c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:26:00,855 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 00:26:00,861 INFO L276 IsEmpty]: Start isEmpty. Operand has 206 states, 130 states have (on average 1.6) internal successors, (208), 131 states have internal predecessors, (208), 73 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2023-11-29 00:26:00,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2023-11-29 00:26:00,893 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:00,894 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:00,895 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:26:00,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:00,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1270848220, now seen corresponding path program 1 times [2023-11-29 00:26:00,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:00,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565994089] [2023-11-29 00:26:00,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:00,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:01,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:01,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:01,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565994089] [2023-11-29 00:26:01,237 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 00:26:01,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853574071] [2023-11-29 00:26:01,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:01,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:01,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:26:01,239 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:26:01,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 00:26:01,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:01,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 1046 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 00:26:01,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:26:01,664 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 10368 trivial. 0 not checked. [2023-11-29 00:26:01,664 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:26:01,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853574071] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:26:01,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:26:01,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:26:01,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55200826] [2023-11-29 00:26:01,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:26:01,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 00:26:01,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:01,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 00:26:01,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 00:26:01,702 INFO L87 Difference]: Start difference. First operand has 206 states, 130 states have (on average 1.6) internal successors, (208), 131 states have internal predecessors, (208), 73 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) Second operand has 2 states, 2 states have (on average 47.0) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (73), 2 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 2 states have call successors, (73) [2023-11-29 00:26:01,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:01,769 INFO L93 Difference]: Finished difference Result 409 states and 779 transitions. [2023-11-29 00:26:01,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 00:26:01,772 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 47.0) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (73), 2 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 2 states have call successors, (73) Word has length 454 [2023-11-29 00:26:01,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:01,782 INFO L225 Difference]: With dead ends: 409 [2023-11-29 00:26:01,782 INFO L226 Difference]: Without dead ends: 204 [2023-11-29 00:26:01,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 00:26:01,792 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:26:01,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 345 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:26:01,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2023-11-29 00:26:01,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2023-11-29 00:26:01,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 129 states have (on average 1.565891472868217) internal successors, (202), 129 states have internal predecessors, (202), 73 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2023-11-29 00:26:01,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 348 transitions. [2023-11-29 00:26:01,858 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 348 transitions. Word has length 454 [2023-11-29 00:26:01,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:01,859 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 348 transitions. [2023-11-29 00:26:01,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 47.0) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (73), 2 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 2 states have call successors, (73) [2023-11-29 00:26:01,860 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 348 transitions. [2023-11-29 00:26:01,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2023-11-29 00:26:01,872 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:01,872 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:01,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 00:26:02,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 00:26:02,074 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:26:02,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:02,075 INFO L85 PathProgramCache]: Analyzing trace with hash 391381530, now seen corresponding path program 1 times [2023-11-29 00:26:02,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:02,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703163246] [2023-11-29 00:26:02,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:02,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:02,173 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:26:02,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [45919738] [2023-11-29 00:26:02,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:02,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:02,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:26:02,175 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:26:02,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 00:26:02,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:02,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 1046 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:26:02,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:26:03,198 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10512 trivial. 0 not checked. [2023-11-29 00:26:03,198 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:26:03,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:03,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703163246] [2023-11-29 00:26:03,198 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:26:03,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45919738] [2023-11-29 00:26:03,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45919738] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:26:03,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:26:03,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:26:03,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105426399] [2023-11-29 00:26:03,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:26:03,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:26:03,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:03,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:26:03,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:26:03,204 INFO L87 Difference]: Start difference. First operand 204 states and 348 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) [2023-11-29 00:26:03,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:03,309 INFO L93 Difference]: Finished difference Result 610 states and 1042 transitions. [2023-11-29 00:26:03,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:26:03,309 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) Word has length 454 [2023-11-29 00:26:03,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:03,316 INFO L225 Difference]: With dead ends: 610 [2023-11-29 00:26:03,316 INFO L226 Difference]: Without dead ends: 407 [2023-11-29 00:26:03,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 452 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:26:03,318 INFO L413 NwaCegarLoop]: 404 mSDtfsCounter, 134 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:26:03,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 727 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:26:03,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2023-11-29 00:26:03,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 404. [2023-11-29 00:26:03,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 255 states have (on average 1.5607843137254902) internal successors, (398), 255 states have internal predecessors, (398), 146 states have call successors, (146), 2 states have call predecessors, (146), 2 states have return successors, (146), 146 states have call predecessors, (146), 146 states have call successors, (146) [2023-11-29 00:26:03,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 690 transitions. [2023-11-29 00:26:03,401 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 690 transitions. Word has length 454 [2023-11-29 00:26:03,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:03,403 INFO L495 AbstractCegarLoop]: Abstraction has 404 states and 690 transitions. [2023-11-29 00:26:03,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) [2023-11-29 00:26:03,404 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 690 transitions. [2023-11-29 00:26:03,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2023-11-29 00:26:03,408 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:03,408 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:03,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 00:26:03,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:03,609 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:26:03,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:03,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1862814257, now seen corresponding path program 1 times [2023-11-29 00:26:03,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:03,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623524680] [2023-11-29 00:26:03,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:03,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:03,681 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:26:03,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1792558906] [2023-11-29 00:26:03,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:03,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:03,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:26:03,683 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:26:03,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 00:26:03,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:03,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 1049 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 00:26:03,983 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:26:04,650 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10512 trivial. 0 not checked. [2023-11-29 00:26:04,651 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:26:04,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:04,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623524680] [2023-11-29 00:26:04,651 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:26:04,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792558906] [2023-11-29 00:26:04,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792558906] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:26:04,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:26:04,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:26:04,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457129234] [2023-11-29 00:26:04,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:26:04,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:26:04,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:04,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:26:04,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:26:04,655 INFO L87 Difference]: Start difference. First operand 404 states and 690 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) [2023-11-29 00:26:05,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:05,330 INFO L93 Difference]: Finished difference Result 1435 states and 2458 transitions. [2023-11-29 00:26:05,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:26:05,330 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) Word has length 455 [2023-11-29 00:26:05,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:05,341 INFO L225 Difference]: With dead ends: 1435 [2023-11-29 00:26:05,341 INFO L226 Difference]: Without dead ends: 1032 [2023-11-29 00:26:05,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 451 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:26:05,345 INFO L413 NwaCegarLoop]: 396 mSDtfsCounter, 449 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 1085 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:26:05,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 1085 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 00:26:05,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2023-11-29 00:26:05,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 1023. [2023-11-29 00:26:05,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 678 states have (on average 1.592920353982301) internal successors, (1080), 680 states have internal predecessors, (1080), 338 states have call successors, (338), 6 states have call predecessors, (338), 6 states have return successors, (338), 336 states have call predecessors, (338), 338 states have call successors, (338) [2023-11-29 00:26:05,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1756 transitions. [2023-11-29 00:26:05,513 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1756 transitions. Word has length 455 [2023-11-29 00:26:05,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:05,514 INFO L495 AbstractCegarLoop]: Abstraction has 1023 states and 1756 transitions. [2023-11-29 00:26:05,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) [2023-11-29 00:26:05,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1756 transitions. [2023-11-29 00:26:05,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2023-11-29 00:26:05,522 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:05,523 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:05,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-29 00:26:05,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:05,724 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:26:05,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:05,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1005226118, now seen corresponding path program 1 times [2023-11-29 00:26:05,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:05,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156051819] [2023-11-29 00:26:05,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:05,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:05,797 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:26:05,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [613341277] [2023-11-29 00:26:05,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:05,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:05,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:26:05,799 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:26:05,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 00:26:06,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:06,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 1047 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 00:26:06,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:26:06,627 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10512 trivial. 0 not checked. [2023-11-29 00:26:06,628 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:26:06,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:06,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156051819] [2023-11-29 00:26:06,628 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:26:06,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613341277] [2023-11-29 00:26:06,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613341277] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:26:06,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:26:06,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:26:06,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089256075] [2023-11-29 00:26:06,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:26:06,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:26:06,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:06,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:26:06,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:26:06,631 INFO L87 Difference]: Start difference. First operand 1023 states and 1756 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 3 states have internal predecessors, (93), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) [2023-11-29 00:26:06,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:06,890 INFO L93 Difference]: Finished difference Result 2156 states and 3697 transitions. [2023-11-29 00:26:06,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:26:06,890 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 3 states have internal predecessors, (93), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) Word has length 455 [2023-11-29 00:26:06,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:06,899 INFO L225 Difference]: With dead ends: 2156 [2023-11-29 00:26:06,899 INFO L226 Difference]: Without dead ends: 1134 [2023-11-29 00:26:06,902 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 [2023-11-29 00:26:06,903 INFO L413 NwaCegarLoop]: 459 mSDtfsCounter, 384 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 1202 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:26:06,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 1202 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 00:26:06,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2023-11-29 00:26:06,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 1126. [2023-11-29 00:26:06,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 757 states have (on average 1.5984147952443857) internal successors, (1210), 760 states have internal predecessors, (1210), 361 states have call successors, (361), 7 states have call predecessors, (361), 7 states have return successors, (361), 358 states have call predecessors, (361), 361 states have call successors, (361) [2023-11-29 00:26:07,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1932 transitions. [2023-11-29 00:26:07,002 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1932 transitions. Word has length 455 [2023-11-29 00:26:07,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:07,003 INFO L495 AbstractCegarLoop]: Abstraction has 1126 states and 1932 transitions. [2023-11-29 00:26:07,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 3 states have internal predecessors, (93), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) [2023-11-29 00:26:07,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1932 transitions. [2023-11-29 00:26:07,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2023-11-29 00:26:07,007 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:07,008 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:07,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 00:26:07,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:07,209 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:26:07,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:07,209 INFO L85 PathProgramCache]: Analyzing trace with hash -11474060, now seen corresponding path program 1 times [2023-11-29 00:26:07,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:07,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908319674] [2023-11-29 00:26:07,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:07,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:07,260 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:26:07,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1447380558] [2023-11-29 00:26:07,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:07,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:07,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:26:07,262 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:26:07,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 00:26:07,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:07,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 1052 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 00:26:07,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:26:07,629 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10512 trivial. 0 not checked. [2023-11-29 00:26:07,629 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:26:07,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:07,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908319674] [2023-11-29 00:26:07,629 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:26:07,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447380558] [2023-11-29 00:26:07,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447380558] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:26:07,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:26:07,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:26:07,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013380161] [2023-11-29 00:26:07,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:26:07,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:26:07,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:07,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:26:07,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:26:07,632 INFO L87 Difference]: Start difference. First operand 1126 states and 1932 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) [2023-11-29 00:26:07,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:07,976 INFO L93 Difference]: Finished difference Result 4776 states and 8160 transitions. [2023-11-29 00:26:07,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:26:07,977 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) Word has length 456 [2023-11-29 00:26:07,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:07,998 INFO L225 Difference]: With dead ends: 4776 [2023-11-29 00:26:07,998 INFO L226 Difference]: Without dead ends: 3651 [2023-11-29 00:26:08,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 454 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:26:08,003 INFO L413 NwaCegarLoop]: 423 mSDtfsCounter, 701 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 1260 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:26:08,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [701 Valid, 1260 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:26:08,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3651 states. [2023-11-29 00:26:08,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3651 to 3637. [2023-11-29 00:26:08,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3637 states, 2500 states have (on average 1.5896) internal successors, (3974), 2520 states have internal predecessors, (3974), 1108 states have call successors, (1108), 28 states have call predecessors, (1108), 28 states have return successors, (1108), 1088 states have call predecessors, (1108), 1108 states have call successors, (1108) [2023-11-29 00:26:08,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3637 states to 3637 states and 6190 transitions. [2023-11-29 00:26:08,370 INFO L78 Accepts]: Start accepts. Automaton has 3637 states and 6190 transitions. Word has length 456 [2023-11-29 00:26:08,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:08,371 INFO L495 AbstractCegarLoop]: Abstraction has 3637 states and 6190 transitions. [2023-11-29 00:26:08,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) [2023-11-29 00:26:08,372 INFO L276 IsEmpty]: Start isEmpty. Operand 3637 states and 6190 transitions. [2023-11-29 00:26:08,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2023-11-29 00:26:08,376 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:08,376 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:08,382 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 00:26:08,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:08,577 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:26:08,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:08,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1599821962, now seen corresponding path program 1 times [2023-11-29 00:26:08,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:08,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487241590] [2023-11-29 00:26:08,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:08,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:08,620 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:26:08,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2134570167] [2023-11-29 00:26:08,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:08,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:08,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:26:08,621 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:26:08,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 00:26:08,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:08,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 1053 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:26:08,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:26:09,248 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 5218 proven. 123 refuted. 0 times theorem prover too weak. 5171 trivial. 0 not checked. [2023-11-29 00:26:09,248 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:26:09,652 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 93 proven. 123 refuted. 0 times theorem prover too weak. 10296 trivial. 0 not checked. [2023-11-29 00:26:09,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:09,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487241590] [2023-11-29 00:26:09,652 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:26:09,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134570167] [2023-11-29 00:26:09,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134570167] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:26:09,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:26:09,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 00:26:09,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641133368] [2023-11-29 00:26:09,654 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:26:09,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:26:09,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:09,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:26:09,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:26:09,657 INFO L87 Difference]: Start difference. First operand 3637 states and 6190 transitions. Second operand has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 2 states have call successors, (114), 2 states have call predecessors, (114), 4 states have return successors, (115), 2 states have call predecessors, (115), 2 states have call successors, (115) [2023-11-29 00:26:10,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:10,191 INFO L93 Difference]: Finished difference Result 5931 states and 10068 transitions. [2023-11-29 00:26:10,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 00:26:10,192 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 2 states have call successors, (114), 2 states have call predecessors, (114), 4 states have return successors, (115), 2 states have call predecessors, (115), 2 states have call successors, (115) Word has length 456 [2023-11-29 00:26:10,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:10,208 INFO L225 Difference]: With dead ends: 5931 [2023-11-29 00:26:10,208 INFO L226 Difference]: Without dead ends: 2295 [2023-11-29 00:26:10,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 914 GetRequests, 904 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 00:26:10,218 INFO L413 NwaCegarLoop]: 261 mSDtfsCounter, 348 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:26:10,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 633 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:26:10,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2295 states. [2023-11-29 00:26:10,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2295 to 2267. [2023-11-29 00:26:10,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2267 states, 1522 states have (on average 1.5630749014454666) internal successors, (2379), 1528 states have internal predecessors, (2379), 722 states have call successors, (722), 22 states have call predecessors, (722), 22 states have return successors, (722), 716 states have call predecessors, (722), 722 states have call successors, (722) [2023-11-29 00:26:10,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2267 states to 2267 states and 3823 transitions. [2023-11-29 00:26:10,525 INFO L78 Accepts]: Start accepts. Automaton has 2267 states and 3823 transitions. Word has length 456 [2023-11-29 00:26:10,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:10,525 INFO L495 AbstractCegarLoop]: Abstraction has 2267 states and 3823 transitions. [2023-11-29 00:26:10,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 2 states have call successors, (114), 2 states have call predecessors, (114), 4 states have return successors, (115), 2 states have call predecessors, (115), 2 states have call successors, (115) [2023-11-29 00:26:10,526 INFO L276 IsEmpty]: Start isEmpty. Operand 2267 states and 3823 transitions. [2023-11-29 00:26:10,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2023-11-29 00:26:10,529 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:10,529 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:10,535 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 00:26:10,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 00:26:10,730 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:26:10,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:10,731 INFO L85 PathProgramCache]: Analyzing trace with hash 858918671, now seen corresponding path program 1 times [2023-11-29 00:26:10,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:10,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028391742] [2023-11-29 00:26:10,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:10,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:10,781 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:26:10,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [939153162] [2023-11-29 00:26:10,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:10,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:10,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:26:10,783 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:26:10,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 00:26:11,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:11,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 1052 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:26:11,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:26:11,226 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 2676 proven. 30 refuted. 0 times theorem prover too weak. 7806 trivial. 0 not checked. [2023-11-29 00:26:11,226 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:26:11,517 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 186 proven. 30 refuted. 0 times theorem prover too weak. 10296 trivial. 0 not checked. [2023-11-29 00:26:11,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:11,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028391742] [2023-11-29 00:26:11,517 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:26:11,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939153162] [2023-11-29 00:26:11,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939153162] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:26:11,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:26:11,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 00:26:11,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844343363] [2023-11-29 00:26:11,518 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:26:11,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:26:11,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:11,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:26:11,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:26:11,521 INFO L87 Difference]: Start difference. First operand 2267 states and 3823 transitions. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 2 states have call successors, (83), 2 states have call predecessors, (83), 4 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) [2023-11-29 00:26:12,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:12,101 INFO L93 Difference]: Finished difference Result 4609 states and 7713 transitions. [2023-11-29 00:26:12,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 00:26:12,102 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 2 states have call successors, (83), 2 states have call predecessors, (83), 4 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) Word has length 458 [2023-11-29 00:26:12,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:12,121 INFO L225 Difference]: With dead ends: 4609 [2023-11-29 00:26:12,122 INFO L226 Difference]: Without dead ends: 2343 [2023-11-29 00:26:12,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 918 GetRequests, 908 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 00:26:12,132 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 387 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:26:12,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 628 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:26:12,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2343 states. [2023-11-29 00:26:12,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2343 to 2299. [2023-11-29 00:26:12,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2299 states, 1546 states have (on average 1.5452781371280724) internal successors, (2389), 1552 states have internal predecessors, (2389), 722 states have call successors, (722), 30 states have call predecessors, (722), 30 states have return successors, (722), 716 states have call predecessors, (722), 722 states have call successors, (722) [2023-11-29 00:26:12,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 3833 transitions. [2023-11-29 00:26:12,496 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 3833 transitions. Word has length 458 [2023-11-29 00:26:12,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:12,497 INFO L495 AbstractCegarLoop]: Abstraction has 2299 states and 3833 transitions. [2023-11-29 00:26:12,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 2 states have call successors, (83), 2 states have call predecessors, (83), 4 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) [2023-11-29 00:26:12,497 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 3833 transitions. [2023-11-29 00:26:12,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2023-11-29 00:26:12,502 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:12,502 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:12,509 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 00:26:12,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:12,703 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:26:12,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:12,704 INFO L85 PathProgramCache]: Analyzing trace with hash 999467281, now seen corresponding path program 1 times [2023-11-29 00:26:12,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:12,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023165653] [2023-11-29 00:26:12,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:12,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:12,754 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:26:12,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [821884824] [2023-11-29 00:26:12,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:12,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:12,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:26:12,755 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:26:12,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 00:26:13,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:13,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 1051 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 00:26:13,051 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:26:13,731 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 6958 proven. 63 refuted. 0 times theorem prover too weak. 3491 trivial. 0 not checked. [2023-11-29 00:26:13,731 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:26:13,930 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10512 trivial. 0 not checked. [2023-11-29 00:26:13,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:13,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023165653] [2023-11-29 00:26:13,931 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:26:13,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821884824] [2023-11-29 00:26:13,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821884824] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:26:13,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:26:13,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-11-29 00:26:13,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680055368] [2023-11-29 00:26:13,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:26:13,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:26:13,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:13,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:26:13,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:26:13,934 INFO L87 Difference]: Start difference. First operand 2299 states and 3833 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) [2023-11-29 00:26:14,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:14,146 INFO L93 Difference]: Finished difference Result 4611 states and 7693 transitions. [2023-11-29 00:26:14,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:26:14,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) Word has length 458 [2023-11-29 00:26:14,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:14,165 INFO L225 Difference]: With dead ends: 4611 [2023-11-29 00:26:14,165 INFO L226 Difference]: Without dead ends: 2313 [2023-11-29 00:26:14,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 914 GetRequests, 908 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:26:14,174 INFO L413 NwaCegarLoop]: 339 mSDtfsCounter, 0 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:26:14,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 651 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:26:14,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2023-11-29 00:26:14,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 2313. [2023-11-29 00:26:14,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2313 states, 1560 states have (on average 1.5403846153846155) internal successors, (2403), 1566 states have internal predecessors, (2403), 722 states have call successors, (722), 30 states have call predecessors, (722), 30 states have return successors, (722), 716 states have call predecessors, (722), 722 states have call successors, (722) [2023-11-29 00:26:14,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2313 states to 2313 states and 3847 transitions. [2023-11-29 00:26:14,540 INFO L78 Accepts]: Start accepts. Automaton has 2313 states and 3847 transitions. Word has length 458 [2023-11-29 00:26:14,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:14,541 INFO L495 AbstractCegarLoop]: Abstraction has 2313 states and 3847 transitions. [2023-11-29 00:26:14,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) [2023-11-29 00:26:14,542 INFO L276 IsEmpty]: Start isEmpty. Operand 2313 states and 3847 transitions. [2023-11-29 00:26:14,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2023-11-29 00:26:14,547 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:14,547 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:14,554 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 00:26:14,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:14,748 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:26:14,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:14,749 INFO L85 PathProgramCache]: Analyzing trace with hash 2059525384, now seen corresponding path program 1 times [2023-11-29 00:26:14,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:14,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435508124] [2023-11-29 00:26:14,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:14,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:14,798 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:26:14,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1020525964] [2023-11-29 00:26:14,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:14,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:14,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:26:14,800 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:26:14,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 00:26:15,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:15,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 1054 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 00:26:15,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:26:16,055 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 7927 proven. 63 refuted. 0 times theorem prover too weak. 2522 trivial. 0 not checked. [2023-11-29 00:26:16,055 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:26:16,620 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 153 proven. 63 refuted. 0 times theorem prover too weak. 10296 trivial. 0 not checked. [2023-11-29 00:26:16,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:16,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435508124] [2023-11-29 00:26:16,620 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:26:16,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020525964] [2023-11-29 00:26:16,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020525964] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:26:16,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:26:16,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2023-11-29 00:26:16,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560199729] [2023-11-29 00:26:16,621 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:26:16,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 00:26:16,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:16,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 00:26:16,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-11-29 00:26:16,624 INFO L87 Difference]: Start difference. First operand 2313 states and 3847 transitions. Second operand has 13 states, 13 states have (on average 12.23076923076923) internal successors, (159), 13 states have internal predecessors, (159), 6 states have call successors, (126), 4 states have call predecessors, (126), 6 states have return successors, (126), 6 states have call predecessors, (126), 6 states have call successors, (126) [2023-11-29 00:26:17,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:17,514 INFO L93 Difference]: Finished difference Result 4715 states and 7789 transitions. [2023-11-29 00:26:17,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 00:26:17,515 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 12.23076923076923) internal successors, (159), 13 states have internal predecessors, (159), 6 states have call successors, (126), 4 states have call predecessors, (126), 6 states have return successors, (126), 6 states have call predecessors, (126), 6 states have call successors, (126) Word has length 459 [2023-11-29 00:26:17,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:17,531 INFO L225 Difference]: With dead ends: 4715 [2023-11-29 00:26:17,531 INFO L226 Difference]: Without dead ends: 2403 [2023-11-29 00:26:17,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 921 GetRequests, 905 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2023-11-29 00:26:17,536 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 698 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 749 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 00:26:17,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [749 Valid, 880 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 00:26:17,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2403 states. [2023-11-29 00:26:17,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2403 to 2345. [2023-11-29 00:26:17,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2345 states, 1584 states have (on average 1.5321969696969697) internal successors, (2427), 1590 states have internal predecessors, (2427), 722 states have call successors, (722), 38 states have call predecessors, (722), 38 states have return successors, (722), 716 states have call predecessors, (722), 722 states have call successors, (722) [2023-11-29 00:26:17,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2345 states to 2345 states and 3871 transitions. [2023-11-29 00:26:17,800 INFO L78 Accepts]: Start accepts. Automaton has 2345 states and 3871 transitions. Word has length 459 [2023-11-29 00:26:17,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:17,801 INFO L495 AbstractCegarLoop]: Abstraction has 2345 states and 3871 transitions. [2023-11-29 00:26:17,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.23076923076923) internal successors, (159), 13 states have internal predecessors, (159), 6 states have call successors, (126), 4 states have call predecessors, (126), 6 states have return successors, (126), 6 states have call predecessors, (126), 6 states have call successors, (126) [2023-11-29 00:26:17,801 INFO L276 IsEmpty]: Start isEmpty. Operand 2345 states and 3871 transitions. [2023-11-29 00:26:17,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2023-11-29 00:26:17,805 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:17,805 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:17,811 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 00:26:18,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:18,006 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:26:18,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:18,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1030166086, now seen corresponding path program 1 times [2023-11-29 00:26:18,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:18,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450211640] [2023-11-29 00:26:18,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:18,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:18,053 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:26:18,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1273864372] [2023-11-29 00:26:18,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:18,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:18,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:26:18,055 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:26:18,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 00:26:18,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:18,359 INFO L262 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 00:26:18,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:26:19,608 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 8328 proven. 99 refuted. 0 times theorem prover too weak. 2085 trivial. 0 not checked. [2023-11-29 00:26:19,608 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:26:20,583 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 327 proven. 102 refuted. 0 times theorem prover too weak. 10083 trivial. 0 not checked. [2023-11-29 00:26:20,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:20,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450211640] [2023-11-29 00:26:20,584 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:26:20,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273864372] [2023-11-29 00:26:20,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273864372] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:26:20,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:26:20,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2023-11-29 00:26:20,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768403056] [2023-11-29 00:26:20,585 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:26:20,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 00:26:20,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:20,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 00:26:20,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2023-11-29 00:26:20,588 INFO L87 Difference]: Start difference. First operand 2345 states and 3871 transitions. Second operand has 23 states, 23 states have (on average 7.565217391304348) internal successors, (174), 23 states have internal predecessors, (174), 8 states have call successors, (126), 5 states have call predecessors, (126), 9 states have return successors, (126), 8 states have call predecessors, (126), 8 states have call successors, (126) [2023-11-29 00:26:23,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:23,401 INFO L93 Difference]: Finished difference Result 11027 states and 18149 transitions. [2023-11-29 00:26:23,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-29 00:26:23,402 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 7.565217391304348) internal successors, (174), 23 states have internal predecessors, (174), 8 states have call successors, (126), 5 states have call predecessors, (126), 9 states have return successors, (126), 8 states have call predecessors, (126), 8 states have call successors, (126) Word has length 459 [2023-11-29 00:26:23,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:23,460 INFO L225 Difference]: With dead ends: 11027 [2023-11-29 00:26:23,460 INFO L226 Difference]: Without dead ends: 8683 [2023-11-29 00:26:23,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 948 GetRequests, 899 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=830, Invalid=1720, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 00:26:23,471 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 3188 mSDsluCounter, 1697 mSDsCounter, 0 mSdLazyCounter, 1939 mSolverCounterSat, 1086 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3255 SdHoareTripleChecker+Valid, 1968 SdHoareTripleChecker+Invalid, 3025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1086 IncrementalHoareTripleChecker+Valid, 1939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-29 00:26:23,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3255 Valid, 1968 Invalid, 3025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1086 Valid, 1939 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-29 00:26:23,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8683 states. [2023-11-29 00:26:24,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8683 to 3853. [2023-11-29 00:26:24,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3853 states, 2846 states have (on average 1.583274771609276) internal successors, (4506), 2866 states have internal predecessors, (4506), 946 states have call successors, (946), 60 states have call predecessors, (946), 60 states have return successors, (946), 926 states have call predecessors, (946), 946 states have call successors, (946) [2023-11-29 00:26:24,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3853 states to 3853 states and 6398 transitions. [2023-11-29 00:26:24,026 INFO L78 Accepts]: Start accepts. Automaton has 3853 states and 6398 transitions. Word has length 459 [2023-11-29 00:26:24,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:24,027 INFO L495 AbstractCegarLoop]: Abstraction has 3853 states and 6398 transitions. [2023-11-29 00:26:24,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.565217391304348) internal successors, (174), 23 states have internal predecessors, (174), 8 states have call successors, (126), 5 states have call predecessors, (126), 9 states have return successors, (126), 8 states have call predecessors, (126), 8 states have call successors, (126) [2023-11-29 00:26:24,028 INFO L276 IsEmpty]: Start isEmpty. Operand 3853 states and 6398 transitions. [2023-11-29 00:26:24,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2023-11-29 00:26:24,035 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:24,035 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:24,042 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 00:26:24,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 00:26:24,243 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:26:24,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:24,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1731765960, now seen corresponding path program 1 times [2023-11-29 00:26:24,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:24,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077401272] [2023-11-29 00:26:24,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:24,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:24,289 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:26:24,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1647878778] [2023-11-29 00:26:24,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:24,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:24,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:26:24,290 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:26:24,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 00:26:24,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:24,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 00:26:24,603 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:26:25,607 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 4822 proven. 150 refuted. 0 times theorem prover too weak. 5540 trivial. 0 not checked. [2023-11-29 00:26:25,607 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:26:26,499 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10512 trivial. 0 not checked. [2023-11-29 00:26:26,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:26,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077401272] [2023-11-29 00:26:26,500 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:26:26,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647878778] [2023-11-29 00:26:26,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647878778] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:26:26,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:26:26,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-11-29 00:26:26,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880409284] [2023-11-29 00:26:26,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:26:26,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:26:26,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:26,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:26:26,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:26:26,503 INFO L87 Difference]: Start difference. First operand 3853 states and 6398 transitions. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 3 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 3 states have call predecessors, (73), 3 states have call successors, (73) [2023-11-29 00:26:27,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:27,457 INFO L93 Difference]: Finished difference Result 10669 states and 17822 transitions. [2023-11-29 00:26:27,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:26:27,458 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 3 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 3 states have call predecessors, (73), 3 states have call successors, (73) Word has length 459 [2023-11-29 00:26:27,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:27,481 INFO L225 Difference]: With dead ends: 10669 [2023-11-29 00:26:27,481 INFO L226 Difference]: Without dead ends: 6817 [2023-11-29 00:26:27,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 918 GetRequests, 909 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-29 00:26:27,492 INFO L413 NwaCegarLoop]: 372 mSDtfsCounter, 873 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:26:27,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [873 Valid, 544 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:26:27,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6817 states. [2023-11-29 00:26:28,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6817 to 6801. [2023-11-29 00:26:28,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6801 states, 5290 states have (on average 1.6139886578449905) internal successors, (8538), 5338 states have internal predecessors, (8538), 1422 states have call successors, (1422), 88 states have call predecessors, (1422), 88 states have return successors, (1422), 1374 states have call predecessors, (1422), 1422 states have call successors, (1422) [2023-11-29 00:26:28,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6801 states to 6801 states and 11382 transitions. [2023-11-29 00:26:28,117 INFO L78 Accepts]: Start accepts. Automaton has 6801 states and 11382 transitions. Word has length 459 [2023-11-29 00:26:28,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:28,118 INFO L495 AbstractCegarLoop]: Abstraction has 6801 states and 11382 transitions. [2023-11-29 00:26:28,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 3 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 3 states have call predecessors, (73), 3 states have call successors, (73) [2023-11-29 00:26:28,118 INFO L276 IsEmpty]: Start isEmpty. Operand 6801 states and 11382 transitions. [2023-11-29 00:26:28,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2023-11-29 00:26:28,124 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:28,125 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:28,131 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 00:26:28,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 00:26:28,325 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:26:28,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:28,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1597752454, now seen corresponding path program 1 times [2023-11-29 00:26:28,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:28,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593652851] [2023-11-29 00:26:28,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:28,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:28,376 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:26:28,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [992379062] [2023-11-29 00:26:28,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:28,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:28,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:26:28,378 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:26:28,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 00:26:28,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:28,710 INFO L262 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:26:28,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:26:29,178 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 3960 proven. 0 refuted. 0 times theorem prover too weak. 6552 trivial. 0 not checked. [2023-11-29 00:26:29,178 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:26:29,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:29,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593652851] [2023-11-29 00:26:29,179 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:26:29,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992379062] [2023-11-29 00:26:29,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992379062] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:26:29,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:26:29,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 00:26:29,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404771859] [2023-11-29 00:26:29,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:26:29,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 00:26:29,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:29,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 00:26:29,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:26:29,181 INFO L87 Difference]: Start difference. First operand 6801 states and 11382 transitions. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 2 states have call successors, (73), 2 states have call predecessors, (73), 2 states have return successors, (73), 2 states have call predecessors, (73), 2 states have call successors, (73) [2023-11-29 00:26:30,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:30,932 INFO L93 Difference]: Finished difference Result 14842 states and 24998 transitions. [2023-11-29 00:26:30,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 00:26:30,932 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 2 states have call successors, (73), 2 states have call predecessors, (73), 2 states have return successors, (73), 2 states have call predecessors, (73), 2 states have call successors, (73) Word has length 459 [2023-11-29 00:26:30,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:30,966 INFO L225 Difference]: With dead ends: 14842 [2023-11-29 00:26:30,966 INFO L226 Difference]: Without dead ends: 11806 [2023-11-29 00:26:30,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:26:30,976 INFO L413 NwaCegarLoop]: 421 mSDtfsCounter, 962 mSDsluCounter, 1101 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 962 SdHoareTripleChecker+Valid, 1522 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 00:26:30,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [962 Valid, 1522 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 00:26:30,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11806 states. [2023-11-29 00:26:31,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11806 to 7093. [2023-11-29 00:26:31,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7093 states, 5582 states have (on average 1.6252239340738086) internal successors, (9072), 5630 states have internal predecessors, (9072), 1422 states have call successors, (1422), 88 states have call predecessors, (1422), 88 states have return successors, (1422), 1374 states have call predecessors, (1422), 1422 states have call successors, (1422) [2023-11-29 00:26:31,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7093 states to 7093 states and 11916 transitions. [2023-11-29 00:26:31,707 INFO L78 Accepts]: Start accepts. Automaton has 7093 states and 11916 transitions. Word has length 459 [2023-11-29 00:26:31,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:31,707 INFO L495 AbstractCegarLoop]: Abstraction has 7093 states and 11916 transitions. [2023-11-29 00:26:31,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 2 states have call successors, (73), 2 states have call predecessors, (73), 2 states have return successors, (73), 2 states have call predecessors, (73), 2 states have call successors, (73) [2023-11-29 00:26:31,707 INFO L276 IsEmpty]: Start isEmpty. Operand 7093 states and 11916 transitions. [2023-11-29 00:26:31,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2023-11-29 00:26:31,713 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:31,714 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:31,720 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 00:26:31,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 00:26:31,914 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:26:31,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:31,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1144299074, now seen corresponding path program 1 times [2023-11-29 00:26:31,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:31,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933426686] [2023-11-29 00:26:31,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:31,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:31,965 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:26:31,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1540182057] [2023-11-29 00:26:31,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:31,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:31,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:26:31,967 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:26:31,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 00:26:32,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:32,290 INFO L262 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 00:26:32,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:26:33,690 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 6912 proven. 93 refuted. 0 times theorem prover too weak. 3507 trivial. 0 not checked. [2023-11-29 00:26:33,690 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:26:34,557 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10512 trivial. 0 not checked. [2023-11-29 00:26:34,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:34,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933426686] [2023-11-29 00:26:34,558 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:26:34,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540182057] [2023-11-29 00:26:34,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540182057] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:26:34,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:26:34,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 17 [2023-11-29 00:26:34,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250481894] [2023-11-29 00:26:34,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:26:34,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 00:26:34,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:34,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 00:26:34,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2023-11-29 00:26:34,561 INFO L87 Difference]: Start difference. First operand 7093 states and 11916 transitions. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 3 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 3 states have call predecessors, (73), 3 states have call successors, (73) [2023-11-29 00:26:38,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:38,683 INFO L93 Difference]: Finished difference Result 30990 states and 51817 transitions. [2023-11-29 00:26:38,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 00:26:38,684 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 3 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 3 states have call predecessors, (73), 3 states have call successors, (73) Word has length 459 [2023-11-29 00:26:38,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:38,739 INFO L225 Difference]: With dead ends: 30990 [2023-11-29 00:26:38,739 INFO L226 Difference]: Without dead ends: 23898 [2023-11-29 00:26:38,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 928 GetRequests, 907 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2023-11-29 00:26:38,757 INFO L413 NwaCegarLoop]: 607 mSDtfsCounter, 1464 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 800 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1464 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 1462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 800 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:26:38,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1464 Valid, 1308 Invalid, 1462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [800 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-29 00:26:38,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23898 states. [2023-11-29 00:26:40,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23898 to 11623. [2023-11-29 00:26:40,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11623 states, 9051 states have (on average 1.6031377748315103) internal successors, (14510), 9142 states have internal predecessors, (14510), 2401 states have call successors, (2401), 170 states have call predecessors, (2401), 170 states have return successors, (2401), 2310 states have call predecessors, (2401), 2401 states have call successors, (2401) [2023-11-29 00:26:40,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11623 states to 11623 states and 19312 transitions. [2023-11-29 00:26:40,484 INFO L78 Accepts]: Start accepts. Automaton has 11623 states and 19312 transitions. Word has length 459 [2023-11-29 00:26:40,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:40,485 INFO L495 AbstractCegarLoop]: Abstraction has 11623 states and 19312 transitions. [2023-11-29 00:26:40,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 3 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 3 states have call predecessors, (73), 3 states have call successors, (73) [2023-11-29 00:26:40,485 INFO L276 IsEmpty]: Start isEmpty. Operand 11623 states and 19312 transitions. [2023-11-29 00:26:40,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2023-11-29 00:26:40,493 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:40,493 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:40,500 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 00:26:40,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 00:26:40,694 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:26:40,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:40,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1845898948, now seen corresponding path program 1 times [2023-11-29 00:26:40,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:40,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465803202] [2023-11-29 00:26:40,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:40,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:40,744 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:26:40,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [606277276] [2023-11-29 00:26:40,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:40,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:40,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:26:40,745 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:26:40,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 00:26:41,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:41,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 00:26:41,108 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:26:41,584 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10512 trivial. 0 not checked. [2023-11-29 00:26:41,584 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:26:41,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:41,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465803202] [2023-11-29 00:26:41,584 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:26:41,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606277276] [2023-11-29 00:26:41,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606277276] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:26:41,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:26:41,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:26:41,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226529910] [2023-11-29 00:26:41,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:26:41,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:26:41,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:41,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:26:41,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:26:41,587 INFO L87 Difference]: Start difference. First operand 11623 states and 19312 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 3 states have internal predecessors, (97), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) [2023-11-29 00:26:43,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:43,882 INFO L93 Difference]: Finished difference Result 29555 states and 49235 transitions. [2023-11-29 00:26:43,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:26:43,883 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 3 states have internal predecessors, (97), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) Word has length 459 [2023-11-29 00:26:43,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:43,920 INFO L225 Difference]: With dead ends: 29555 [2023-11-29 00:26:43,920 INFO L226 Difference]: Without dead ends: 17964 [2023-11-29 00:26:43,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 456 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:26:43,941 INFO L413 NwaCegarLoop]: 666 mSDtfsCounter, 460 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:26:43,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [460 Valid, 852 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 00:26:43,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17964 states. [2023-11-29 00:26:46,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17964 to 15224. [2023-11-29 00:26:46,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15224 states, 11368 states have (on average 1.563423645320197) internal successors, (17773), 11487 states have internal predecessors, (17773), 3576 states have call successors, (3576), 279 states have call predecessors, (3576), 279 states have return successors, (3576), 3457 states have call predecessors, (3576), 3576 states have call successors, (3576) [2023-11-29 00:26:46,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15224 states to 15224 states and 24925 transitions. [2023-11-29 00:26:46,264 INFO L78 Accepts]: Start accepts. Automaton has 15224 states and 24925 transitions. Word has length 459 [2023-11-29 00:26:46,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:46,265 INFO L495 AbstractCegarLoop]: Abstraction has 15224 states and 24925 transitions. [2023-11-29 00:26:46,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 3 states have internal predecessors, (97), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) [2023-11-29 00:26:46,265 INFO L276 IsEmpty]: Start isEmpty. Operand 15224 states and 24925 transitions. [2023-11-29 00:26:46,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2023-11-29 00:26:46,274 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:46,274 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:46,280 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 00:26:46,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 00:26:46,475 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:26:46,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:46,476 INFO L85 PathProgramCache]: Analyzing trace with hash -938238432, now seen corresponding path program 1 times [2023-11-29 00:26:46,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:46,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278513013] [2023-11-29 00:26:46,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:46,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:46,518 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:26:46,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [361760265] [2023-11-29 00:26:46,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:46,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:46,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:26:46,519 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:26:46,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e473a8e-f123-4d03-b77d-8f0aeda91136/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 00:26:46,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:46,924 INFO L262 TraceCheckSpWp]: Trace formula consists of 1054 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-29 00:26:46,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:26:50,146 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 1805 proven. 597 refuted. 0 times theorem prover too weak. 8110 trivial. 0 not checked. [2023-11-29 00:26:50,146 INFO L327 TraceCheckSpWp]: Computing backward predicates...