./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-42.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-42.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl --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 bcbcb400fb3c2001bae06c1a3f5fabc11943b7dd9f57ad2b480b7bdc063ccccb --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:21:47,296 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:21:47,393 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:21:47,398 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:21:47,399 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:21:47,422 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:21:47,423 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:21:47,424 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:21:47,425 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:21:47,425 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:21:47,426 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:21:47,427 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:21:47,427 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:21:47,428 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:21:47,429 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:21:47,429 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:21:47,430 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:21:47,430 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:21:47,431 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:21:47,431 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:21:47,432 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:21:47,432 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:21:47,433 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:21:47,433 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:21:47,433 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:21:47,434 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:21:47,434 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:21:47,435 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:21:47,435 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:21:47,436 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:21:47,436 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:21:47,437 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:21:47,437 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:21:47,437 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:21:47,438 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:21:47,438 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:21:47,439 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:21:47,439 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:21:47,440 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:21:47,440 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_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bcbcb400fb3c2001bae06c1a3f5fabc11943b7dd9f57ad2b480b7bdc063ccccb [2023-11-12 02:21:47,740 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:21:47,765 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:21:47,769 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:21:47,771 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:21:47,776 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:21:47,777 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-42.i [2023-11-12 02:21:50,814 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:21:51,092 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:21:51,094 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-42.i [2023-11-12 02:21:51,111 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/data/8e989225e/81054105f4f146cbac6339af381072ac/FLAG3111cfc88 [2023-11-12 02:21:51,128 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/data/8e989225e/81054105f4f146cbac6339af381072ac [2023-11-12 02:21:51,131 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:21:51,133 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:21:51,141 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:21:51,141 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:21:51,147 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:21:51,147 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:21:51" (1/1) ... [2023-11-12 02:21:51,149 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57cfe2bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:51, skipping insertion in model container [2023-11-12 02:21:51,149 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:21:51" (1/1) ... [2023-11-12 02:21:51,188 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:21:51,365 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_220a190d-b6f8-4af0-8e51-c52c3ab422f5/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-42.i[916,929] [2023-11-12 02:21:51,525 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:21:51,551 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:21:51,562 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_220a190d-b6f8-4af0-8e51-c52c3ab422f5/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-42.i[916,929] [2023-11-12 02:21:51,620 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:21:51,642 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:21:51,643 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:51 WrapperNode [2023-11-12 02:21:51,643 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:21:51,645 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:21:51,646 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:21:51,646 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:21:51,654 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:51" (1/1) ... [2023-11-12 02:21:51,681 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:51" (1/1) ... [2023-11-12 02:21:51,747 INFO L138 Inliner]: procedures = 26, calls = 70, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 335 [2023-11-12 02:21:51,748 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:21:51,749 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:21:51,749 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:21:51,749 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:21:51,760 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:51" (1/1) ... [2023-11-12 02:21:51,760 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:51" (1/1) ... [2023-11-12 02:21:51,766 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:51" (1/1) ... [2023-11-12 02:21:51,766 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:51" (1/1) ... [2023-11-12 02:21:51,787 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:51" (1/1) ... [2023-11-12 02:21:51,793 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:51" (1/1) ... [2023-11-12 02:21:51,799 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:51" (1/1) ... [2023-11-12 02:21:51,803 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:51" (1/1) ... [2023-11-12 02:21:51,813 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:21:51,814 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:21:51,815 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:21:51,815 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:21:51,816 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:51" (1/1) ... [2023-11-12 02:21:51,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:21:51,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:21:51,890 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:21:51,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:21:51,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:21:51,941 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 02:21:51,941 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 02:21:51,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:21:51,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:21:51,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:21:52,101 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:21:52,103 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:21:52,843 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:21:52,853 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:21:52,854 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 02:21:52,857 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:21:52 BoogieIcfgContainer [2023-11-12 02:21:52,857 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:21:52,864 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:21:52,864 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:21:52,868 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:21:52,869 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:21:51" (1/3) ... [2023-11-12 02:21:52,870 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dcc9eac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:21:52, skipping insertion in model container [2023-11-12 02:21:52,870 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:51" (2/3) ... [2023-11-12 02:21:52,870 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dcc9eac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:21:52, skipping insertion in model container [2023-11-12 02:21:52,871 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:21:52" (3/3) ... [2023-11-12 02:21:52,872 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-100_file-42.i [2023-11-12 02:21:52,892 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:21:52,892 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:21:52,971 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:21:52,976 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;@b657062, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:21:52,977 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:21:52,981 INFO L276 IsEmpty]: Start isEmpty. Operand has 146 states, 86 states have (on average 1.4534883720930232) internal successors, (125), 87 states have internal predecessors, (125), 57 states have call successors, (57), 1 states have call predecessors, (57), 1 states have return successors, (57), 57 states have call predecessors, (57), 57 states have call successors, (57) [2023-11-12 02:21:53,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2023-11-12 02:21:53,005 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:21:53,006 INFO L195 NwaCegarLoop]: trace histogram [57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:53,007 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:21:53,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:53,013 INFO L85 PathProgramCache]: Analyzing trace with hash -770849349, now seen corresponding path program 1 times [2023-11-12 02:21:53,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:53,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761965530] [2023-11-12 02:21:53,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:53,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:53,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:53,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:53,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761965530] [2023-11-12 02:21:53,509 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-12 02:21:53,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003826422] [2023-11-12 02:21:53,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:53,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:53,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:21:53,513 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:21:53,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:21:53,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:53,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 820 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-12 02:21:53,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:21:53,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 6272 trivial. 0 not checked. [2023-11-12 02:21:53,934 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:21:53,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003826422] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:53,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:53,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:21:53,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874660802] [2023-11-12 02:21:53,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:53,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:21:53,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:53,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:21:53,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:21:53,978 INFO L87 Difference]: Start difference. First operand has 146 states, 86 states have (on average 1.4534883720930232) internal successors, (125), 87 states have internal predecessors, (125), 57 states have call successors, (57), 1 states have call predecessors, (57), 1 states have return successors, (57), 57 states have call predecessors, (57), 57 states have call successors, (57) Second operand has 2 states, 2 states have (on average 36.5) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (57), 1 states have call predecessors, (57), 2 states have call successors, (57) [2023-11-12 02:21:54,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:21:54,066 INFO L93 Difference]: Finished difference Result 285 states and 529 transitions. [2023-11-12 02:21:54,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:21:54,068 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 36.5) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (57), 1 states have call predecessors, (57), 2 states have call successors, (57) Word has length 353 [2023-11-12 02:21:54,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:21:54,081 INFO L225 Difference]: With dead ends: 285 [2023-11-12 02:21:54,081 INFO L226 Difference]: Without dead ends: 142 [2023-11-12 02:21:54,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:21:54,094 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:21:54,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:21:54,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-11-12 02:21:54,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2023-11-12 02:21:54,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 83 states have (on average 1.4216867469879517) internal successors, (118), 83 states have internal predecessors, (118), 57 states have call successors, (57), 1 states have call predecessors, (57), 1 states have return successors, (57), 57 states have call predecessors, (57), 57 states have call successors, (57) [2023-11-12 02:21:54,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 232 transitions. [2023-11-12 02:21:54,186 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 232 transitions. Word has length 353 [2023-11-12 02:21:54,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:21:54,188 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 232 transitions. [2023-11-12 02:21:54,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 36.5) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (57), 1 states have call predecessors, (57), 2 states have call successors, (57) [2023-11-12 02:21:54,189 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 232 transitions. [2023-11-12 02:21:54,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2023-11-12 02:21:54,206 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:21:54,207 INFO L195 NwaCegarLoop]: trace histogram [57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:54,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:21:54,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 02:21:54,414 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:21:54,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:54,415 INFO L85 PathProgramCache]: Analyzing trace with hash -748396739, now seen corresponding path program 1 times [2023-11-12 02:21:54,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:54,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729115300] [2023-11-12 02:21:54,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:54,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:54,568 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:21:54,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [311485486] [2023-11-12 02:21:54,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:54,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:54,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:21:54,571 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:21:54,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:21:54,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:54,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 820 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:21:54,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:21:54,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6384 trivial. 0 not checked. [2023-11-12 02:21:54,908 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:21:54,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:54,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729115300] [2023-11-12 02:21:54,909 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:21:54,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311485486] [2023-11-12 02:21:54,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311485486] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:54,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:54,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:21:54,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888447656] [2023-11-12 02:21:54,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:54,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:21:54,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:54,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:21:54,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:21:54,915 INFO L87 Difference]: Start difference. First operand 142 states and 232 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 1 states have call successors, (57), 1 states have call predecessors, (57), 1 states have return successors, (57), 1 states have call predecessors, (57), 1 states have call successors, (57) [2023-11-12 02:21:54,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:21:54,964 INFO L93 Difference]: Finished difference Result 281 states and 461 transitions. [2023-11-12 02:21:54,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:21:54,965 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 1 states have call successors, (57), 1 states have call predecessors, (57), 1 states have return successors, (57), 1 states have call predecessors, (57), 1 states have call successors, (57) Word has length 353 [2023-11-12 02:21:54,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:21:54,970 INFO L225 Difference]: With dead ends: 281 [2023-11-12 02:21:54,970 INFO L226 Difference]: Without dead ends: 142 [2023-11-12 02:21:54,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:21:54,972 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 11 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:21:54,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 437 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:21:54,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-11-12 02:21:54,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2023-11-12 02:21:54,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 83 states have (on average 1.4096385542168675) internal successors, (117), 83 states have internal predecessors, (117), 57 states have call successors, (57), 1 states have call predecessors, (57), 1 states have return successors, (57), 57 states have call predecessors, (57), 57 states have call successors, (57) [2023-11-12 02:21:54,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 231 transitions. [2023-11-12 02:21:54,995 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 231 transitions. Word has length 353 [2023-11-12 02:21:54,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:21:54,998 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 231 transitions. [2023-11-12 02:21:54,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 1 states have call successors, (57), 1 states have call predecessors, (57), 1 states have return successors, (57), 1 states have call predecessors, (57), 1 states have call successors, (57) [2023-11-12 02:21:54,999 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 231 transitions. [2023-11-12 02:21:55,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2023-11-12 02:21:55,002 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:21:55,003 INFO L195 NwaCegarLoop]: trace histogram [57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:55,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:21:55,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:55,210 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:21:55,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:55,211 INFO L85 PathProgramCache]: Analyzing trace with hash -68338369, now seen corresponding path program 1 times [2023-11-12 02:21:55,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:55,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939842399] [2023-11-12 02:21:55,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:55,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:55,312 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:21:55,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2004609760] [2023-11-12 02:21:55,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:55,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:55,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:21:55,329 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:21:55,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:21:55,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:55,651 INFO L262 TraceCheckSpWp]: Trace formula consists of 818 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 02:21:55,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:21:56,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6384 trivial. 0 not checked. [2023-11-12 02:21:56,429 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:21:56,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:56,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939842399] [2023-11-12 02:21:56,430 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:21:56,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004609760] [2023-11-12 02:21:56,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004609760] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:56,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:56,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:21:56,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547383507] [2023-11-12 02:21:56,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:56,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:21:56,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:56,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:21:56,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:21:56,437 INFO L87 Difference]: Start difference. First operand 142 states and 231 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 1 states have call successors, (57), 1 states have call predecessors, (57), 1 states have return successors, (57), 1 states have call predecessors, (57), 1 states have call successors, (57) [2023-11-12 02:21:56,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:21:56,968 INFO L93 Difference]: Finished difference Result 507 states and 832 transitions. [2023-11-12 02:21:56,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:21:56,969 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 1 states have call successors, (57), 1 states have call predecessors, (57), 1 states have return successors, (57), 1 states have call predecessors, (57), 1 states have call successors, (57) Word has length 353 [2023-11-12 02:21:56,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:21:56,980 INFO L225 Difference]: With dead ends: 507 [2023-11-12 02:21:56,980 INFO L226 Difference]: Without dead ends: 368 [2023-11-12 02:21:56,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:21:56,985 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 446 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 845 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:21:56,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [446 Valid, 845 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 02:21:56,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2023-11-12 02:21:57,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 275. [2023-11-12 02:21:57,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 158 states have (on average 1.4367088607594938) internal successors, (227), 158 states have internal predecessors, (227), 114 states have call successors, (114), 2 states have call predecessors, (114), 2 states have return successors, (114), 114 states have call predecessors, (114), 114 states have call successors, (114) [2023-11-12 02:21:57,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 455 transitions. [2023-11-12 02:21:57,082 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 455 transitions. Word has length 353 [2023-11-12 02:21:57,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:21:57,083 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 455 transitions. [2023-11-12 02:21:57,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 1 states have call successors, (57), 1 states have call predecessors, (57), 1 states have return successors, (57), 1 states have call predecessors, (57), 1 states have call successors, (57) [2023-11-12 02:21:57,084 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 455 transitions. [2023-11-12 02:21:57,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2023-11-12 02:21:57,087 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:21:57,088 INFO L195 NwaCegarLoop]: trace histogram [57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:57,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:21:57,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:57,296 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:21:57,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:57,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1271641427, now seen corresponding path program 1 times [2023-11-12 02:21:57,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:57,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968636486] [2023-11-12 02:21:57,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:57,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:57,383 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:21:57,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [313108265] [2023-11-12 02:21:57,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:57,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:57,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:21:57,389 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:21:57,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:21:57,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:57,654 INFO L262 TraceCheckSpWp]: Trace formula consists of 814 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:21:57,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:21:57,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 2786 proven. 51 refuted. 0 times theorem prover too weak. 3547 trivial. 0 not checked. [2023-11-12 02:21:57,900 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:21:58,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 117 proven. 51 refuted. 0 times theorem prover too weak. 6216 trivial. 0 not checked. [2023-11-12 02:21:58,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:58,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968636486] [2023-11-12 02:21:58,239 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:21:58,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313108265] [2023-11-12 02:21:58,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313108265] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:21:58,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:21:58,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-12 02:21:58,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046057492] [2023-11-12 02:21:58,240 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:21:58,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:21:58,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:58,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:21:58,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:21:58,244 INFO L87 Difference]: Start difference. First operand 275 states and 455 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, (74), 2 states have call predecessors, (74), 4 states have return successors, (75), 3 states have call predecessors, (75), 3 states have call successors, (75) [2023-11-12 02:21:58,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:21:58,704 INFO L93 Difference]: Finished difference Result 453 states and 742 transitions. [2023-11-12 02:21:58,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:21:58,706 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, (74), 2 states have call predecessors, (74), 4 states have return successors, (75), 3 states have call predecessors, (75), 3 states have call successors, (75) Word has length 354 [2023-11-12 02:21:58,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:21:58,714 INFO L225 Difference]: With dead ends: 453 [2023-11-12 02:21:58,714 INFO L226 Difference]: Without dead ends: 287 [2023-11-12 02:21:58,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 710 GetRequests, 700 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:21:58,721 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 332 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:21:58,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 386 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 02:21:58,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2023-11-12 02:21:58,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 283. [2023-11-12 02:21:58,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 164 states have (on average 1.4024390243902438) internal successors, (230), 164 states have internal predecessors, (230), 114 states have call successors, (114), 4 states have call predecessors, (114), 4 states have return successors, (114), 114 states have call predecessors, (114), 114 states have call successors, (114) [2023-11-12 02:21:58,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 458 transitions. [2023-11-12 02:21:58,801 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 458 transitions. Word has length 354 [2023-11-12 02:21:58,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:21:58,804 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 458 transitions. [2023-11-12 02:21:58,804 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, (74), 2 states have call predecessors, (74), 4 states have return successors, (75), 3 states have call predecessors, (75), 3 states have call successors, (75) [2023-11-12 02:21:58,804 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 458 transitions. [2023-11-12 02:21:58,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2023-11-12 02:21:58,808 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:21:58,808 INFO L195 NwaCegarLoop]: trace histogram [57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:58,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:21:59,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:59,016 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:21:59,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:59,016 INFO L85 PathProgramCache]: Analyzing trace with hash -762168337, now seen corresponding path program 1 times [2023-11-12 02:21:59,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:59,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495467710] [2023-11-12 02:21:59,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:59,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:59,068 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:21:59,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1892040615] [2023-11-12 02:21:59,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:59,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:59,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:21:59,070 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:21:59,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:21:59,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:59,356 INFO L262 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-12 02:21:59,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:00,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 2039 proven. 279 refuted. 0 times theorem prover too weak. 4066 trivial. 0 not checked. [2023-11-12 02:22:00,611 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:22:01,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 51 proven. 282 refuted. 0 times theorem prover too weak. 6051 trivial. 0 not checked. [2023-11-12 02:22:01,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:01,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495467710] [2023-11-12 02:22:01,395 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:22:01,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892040615] [2023-11-12 02:22:01,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892040615] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:22:01,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:22:01,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2023-11-12 02:22:01,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361622793] [2023-11-12 02:22:01,397 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:22:01,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-12 02:22:01,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:01,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-12 02:22:01,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2023-11-12 02:22:01,401 INFO L87 Difference]: Start difference. First operand 283 states and 458 transitions. Second operand has 14 states, 14 states have (on average 7.0) internal successors, (98), 14 states have internal predecessors, (98), 3 states have call successors, (106), 3 states have call predecessors, (106), 7 states have return successors, (107), 3 states have call predecessors, (107), 3 states have call successors, (107) [2023-11-12 02:22:03,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:03,217 INFO L93 Difference]: Finished difference Result 767 states and 1194 transitions. [2023-11-12 02:22:03,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-12 02:22:03,218 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.0) internal successors, (98), 14 states have internal predecessors, (98), 3 states have call successors, (106), 3 states have call predecessors, (106), 7 states have return successors, (107), 3 states have call predecessors, (107), 3 states have call successors, (107) Word has length 354 [2023-11-12 02:22:03,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:03,224 INFO L225 Difference]: With dead ends: 767 [2023-11-12 02:22:03,224 INFO L226 Difference]: Without dead ends: 624 [2023-11-12 02:22:03,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 743 GetRequests, 696 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=578, Invalid=1584, Unknown=0, NotChecked=0, Total=2162 [2023-11-12 02:22:03,227 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 553 mSDsluCounter, 827 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 1145 SdHoareTripleChecker+Invalid, 1214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:22:03,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [561 Valid, 1145 Invalid, 1214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-12 02:22:03,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2023-11-12 02:22:03,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 447. [2023-11-12 02:22:03,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 263 states have (on average 1.3688212927756653) internal successors, (360), 263 states have internal predecessors, (360), 171 states have call successors, (171), 12 states have call predecessors, (171), 12 states have return successors, (171), 171 states have call predecessors, (171), 171 states have call successors, (171) [2023-11-12 02:22:03,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 702 transitions. [2023-11-12 02:22:03,325 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 702 transitions. Word has length 354 [2023-11-12 02:22:03,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:03,326 INFO L495 AbstractCegarLoop]: Abstraction has 447 states and 702 transitions. [2023-11-12 02:22:03,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.0) internal successors, (98), 14 states have internal predecessors, (98), 3 states have call successors, (106), 3 states have call predecessors, (106), 7 states have return successors, (107), 3 states have call predecessors, (107), 3 states have call successors, (107) [2023-11-12 02:22:03,327 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 702 transitions. [2023-11-12 02:22:03,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2023-11-12 02:22:03,331 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:03,332 INFO L195 NwaCegarLoop]: trace histogram [57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:03,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:22:03,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:03,540 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:22:03,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:03,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1773285587, now seen corresponding path program 1 times [2023-11-12 02:22:03,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:03,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544773007] [2023-11-12 02:22:03,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:03,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:03,603 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:22:03,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1151549413] [2023-11-12 02:22:03,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:03,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:03,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:03,605 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:03,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:22:03,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:03,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-12 02:22:03,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:05,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6384 trivial. 0 not checked. [2023-11-12 02:22:05,318 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:22:05,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:05,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544773007] [2023-11-12 02:22:05,318 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:22:05,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151549413] [2023-11-12 02:22:05,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151549413] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:05,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:05,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:22:05,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830369878] [2023-11-12 02:22:05,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:05,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:22:05,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:05,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:22:05,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:22:05,322 INFO L87 Difference]: Start difference. First operand 447 states and 702 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 1 states have call successors, (57), 1 states have call predecessors, (57), 1 states have return successors, (57), 1 states have call predecessors, (57), 1 states have call successors, (57) [2023-11-12 02:22:05,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:05,761 INFO L93 Difference]: Finished difference Result 940 states and 1465 transitions. [2023-11-12 02:22:05,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:22:05,762 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 1 states have call successors, (57), 1 states have call predecessors, (57), 1 states have return successors, (57), 1 states have call predecessors, (57), 1 states have call successors, (57) Word has length 354 [2023-11-12 02:22:05,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:05,768 INFO L225 Difference]: With dead ends: 940 [2023-11-12 02:22:05,768 INFO L226 Difference]: Without dead ends: 641 [2023-11-12 02:22:05,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:22:05,771 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 194 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:22:05,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 792 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:22:05,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2023-11-12 02:22:05,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 606. [2023-11-12 02:22:05,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 361 states have (on average 1.368421052631579) internal successors, (494), 361 states have internal predecessors, (494), 228 states have call successors, (228), 16 states have call predecessors, (228), 16 states have return successors, (228), 228 states have call predecessors, (228), 228 states have call successors, (228) [2023-11-12 02:22:05,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 950 transitions. [2023-11-12 02:22:05,915 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 950 transitions. Word has length 354 [2023-11-12 02:22:05,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:05,916 INFO L495 AbstractCegarLoop]: Abstraction has 606 states and 950 transitions. [2023-11-12 02:22:05,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 1 states have call successors, (57), 1 states have call predecessors, (57), 1 states have return successors, (57), 1 states have call predecessors, (57), 1 states have call successors, (57) [2023-11-12 02:22:05,916 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 950 transitions. [2023-11-12 02:22:05,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2023-11-12 02:22:05,938 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:05,938 INFO L195 NwaCegarLoop]: trace histogram [57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:05,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:22:06,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-12 02:22:06,139 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:22:06,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:06,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1241818031, now seen corresponding path program 1 times [2023-11-12 02:22:06,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:06,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475922165] [2023-11-12 02:22:06,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:06,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:06,191 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:22:06,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [570268769] [2023-11-12 02:22:06,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:06,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:06,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:06,193 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:06,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:22:06,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:06,638 INFO L262 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-12 02:22:06,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:07,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 3320 proven. 168 refuted. 0 times theorem prover too weak. 2896 trivial. 0 not checked. [2023-11-12 02:22:07,792 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:22:08,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 318 proven. 177 refuted. 0 times theorem prover too weak. 5889 trivial. 0 not checked. [2023-11-12 02:22:08,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:08,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475922165] [2023-11-12 02:22:08,824 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:22:08,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570268769] [2023-11-12 02:22:08,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570268769] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:22:08,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:22:08,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2023-11-12 02:22:08,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615931788] [2023-11-12 02:22:08,826 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:22:08,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-12 02:22:08,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:08,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-12 02:22:08,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2023-11-12 02:22:08,829 INFO L87 Difference]: Start difference. First operand 606 states and 950 transitions. Second operand has 22 states, 21 states have (on average 5.857142857142857) internal successors, (123), 20 states have internal predecessors, (123), 7 states have call successors, (79), 4 states have call predecessors, (79), 9 states have return successors, (80), 7 states have call predecessors, (80), 7 states have call successors, (80) [2023-11-12 02:22:12,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:12,333 INFO L93 Difference]: Finished difference Result 1713 states and 2580 transitions. [2023-11-12 02:22:12,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-12 02:22:12,334 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 5.857142857142857) internal successors, (123), 20 states have internal predecessors, (123), 7 states have call successors, (79), 4 states have call predecessors, (79), 9 states have return successors, (80), 7 states have call predecessors, (80), 7 states have call successors, (80) Word has length 354 [2023-11-12 02:22:12,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:12,347 INFO L225 Difference]: With dead ends: 1713 [2023-11-12 02:22:12,347 INFO L226 Difference]: Without dead ends: 1249 [2023-11-12 02:22:12,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 746 GetRequests, 692 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=825, Invalid=2255, Unknown=0, NotChecked=0, Total=3080 [2023-11-12 02:22:12,351 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 931 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 1084 mSolverCounterSat, 543 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 931 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 1627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 543 IncrementalHoareTripleChecker+Valid, 1084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:22:12,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [931 Valid, 822 Invalid, 1627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [543 Valid, 1084 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-12 02:22:12,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2023-11-12 02:22:12,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 1177. [2023-11-12 02:22:12,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 728 states have (on average 1.3365384615384615) internal successors, (973), 728 states have internal predecessors, (973), 399 states have call successors, (399), 49 states have call predecessors, (399), 49 states have return successors, (399), 399 states have call predecessors, (399), 399 states have call successors, (399) [2023-11-12 02:22:12,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 1771 transitions. [2023-11-12 02:22:12,609 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 1771 transitions. Word has length 354 [2023-11-12 02:22:12,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:12,610 INFO L495 AbstractCegarLoop]: Abstraction has 1177 states and 1771 transitions. [2023-11-12 02:22:12,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 5.857142857142857) internal successors, (123), 20 states have internal predecessors, (123), 7 states have call successors, (79), 4 states have call predecessors, (79), 9 states have return successors, (80), 7 states have call predecessors, (80), 7 states have call successors, (80) [2023-11-12 02:22:12,610 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 1771 transitions. [2023-11-12 02:22:12,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2023-11-12 02:22:12,613 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:12,614 INFO L195 NwaCegarLoop]: trace histogram [57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:12,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:22:12,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-12 02:22:12,822 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:22:12,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:12,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1519119808, now seen corresponding path program 1 times [2023-11-12 02:22:12,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:12,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980023511] [2023-11-12 02:22:12,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:12,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:12,871 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:22:12,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [369053633] [2023-11-12 02:22:12,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:12,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:12,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:12,873 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:12,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:22:13,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:13,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-12 02:22:13,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:15,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 3608 proven. 363 refuted. 0 times theorem prover too weak. 2413 trivial. 0 not checked. [2023-11-12 02:22:15,979 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:22:19,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 447 proven. 207 refuted. 0 times theorem prover too weak. 5730 trivial. 0 not checked. [2023-11-12 02:22:19,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:19,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980023511] [2023-11-12 02:22:19,720 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:22:19,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369053633] [2023-11-12 02:22:19,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369053633] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:22:19,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:22:19,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 41 [2023-11-12 02:22:19,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021900077] [2023-11-12 02:22:19,721 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:22:19,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-12 02:22:19,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:19,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-12 02:22:19,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=1263, Unknown=0, NotChecked=0, Total=1640 [2023-11-12 02:22:19,725 INFO L87 Difference]: Start difference. First operand 1177 states and 1771 transitions. Second operand has 41 states, 39 states have (on average 3.6153846153846154) internal successors, (141), 37 states have internal predecessors, (141), 13 states have call successors, (79), 7 states have call predecessors, (79), 14 states have return successors, (81), 13 states have call predecessors, (81), 13 states have call successors, (81) [2023-11-12 02:22:23,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-12 02:22:38,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:38,424 INFO L93 Difference]: Finished difference Result 3464 states and 4956 transitions. [2023-11-12 02:22:38,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2023-11-12 02:22:38,425 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 3.6153846153846154) internal successors, (141), 37 states have internal predecessors, (141), 13 states have call successors, (79), 7 states have call predecessors, (79), 14 states have return successors, (81), 13 states have call predecessors, (81), 13 states have call successors, (81) Word has length 355 [2023-11-12 02:22:38,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:38,449 INFO L225 Difference]: With dead ends: 3464 [2023-11-12 02:22:38,450 INFO L226 Difference]: Without dead ends: 2960 [2023-11-12 02:22:38,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 817 GetRequests, 685 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6056 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=3850, Invalid=13972, Unknown=0, NotChecked=0, Total=17822 [2023-11-12 02:22:38,464 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 1547 mSDsluCounter, 1865 mSDsCounter, 0 mSdLazyCounter, 2754 mSolverCounterSat, 1188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1580 SdHoareTripleChecker+Valid, 2185 SdHoareTripleChecker+Invalid, 3942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1188 IncrementalHoareTripleChecker+Valid, 2754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2023-11-12 02:22:38,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1580 Valid, 2185 Invalid, 3942 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1188 Valid, 2754 Invalid, 0 Unknown, 0 Unchecked, 11.5s Time] [2023-11-12 02:22:38,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2960 states. [2023-11-12 02:22:39,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2960 to 2747. [2023-11-12 02:22:39,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2747 states, 1716 states have (on average 1.2902097902097902) internal successors, (2214), 1719 states have internal predecessors, (2214), 876 states have call successors, (876), 154 states have call predecessors, (876), 154 states have return successors, (876), 873 states have call predecessors, (876), 876 states have call successors, (876) [2023-11-12 02:22:39,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2747 states to 2747 states and 3966 transitions. [2023-11-12 02:22:39,128 INFO L78 Accepts]: Start accepts. Automaton has 2747 states and 3966 transitions. Word has length 355 [2023-11-12 02:22:39,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:39,129 INFO L495 AbstractCegarLoop]: Abstraction has 2747 states and 3966 transitions. [2023-11-12 02:22:39,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 3.6153846153846154) internal successors, (141), 37 states have internal predecessors, (141), 13 states have call successors, (79), 7 states have call predecessors, (79), 14 states have return successors, (81), 13 states have call predecessors, (81), 13 states have call successors, (81) [2023-11-12 02:22:39,130 INFO L276 IsEmpty]: Start isEmpty. Operand 2747 states and 3966 transitions. [2023-11-12 02:22:39,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2023-11-12 02:22:39,133 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:39,134 INFO L195 NwaCegarLoop]: trace histogram [57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:39,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:22:39,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-12 02:22:39,347 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:22:39,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:39,348 INFO L85 PathProgramCache]: Analyzing trace with hash -2074247614, now seen corresponding path program 1 times [2023-11-12 02:22:39,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:39,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819910453] [2023-11-12 02:22:39,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:39,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:39,400 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:22:39,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [555667252] [2023-11-12 02:22:39,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:39,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:39,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:39,402 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:39,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_220a190d-b6f8-4af0-8e51-c52c3ab422f5/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:22:39,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:39,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-12 02:22:39,779 INFO L285 TraceCheckSpWp]: Computing forward predicates...