./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-72.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-72.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu --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 334dc4437eaac80eceb8d1af75e80c429404d34e2c4d4fc214f68fc3c74220fb --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:37:47,572 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:37:47,692 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:37:47,703 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:37:47,704 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:37:47,747 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:37:47,748 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:37:47,749 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:37:47,750 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:37:47,755 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:37:47,756 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:37:47,757 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:37:47,758 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:37:47,760 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:37:47,760 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:37:47,760 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:37:47,761 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:37:47,761 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:37:47,762 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:37:47,762 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:37:47,763 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:37:47,763 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:37:47,764 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:37:47,764 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:37:47,765 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:37:47,766 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:37:47,766 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:37:47,767 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:37:47,767 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:37:47,768 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:37:47,769 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:37:47,770 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:37:47,770 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:37:47,770 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:37:47,771 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:37:47,771 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:37:47,771 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:37:47,771 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:37:47,772 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:37:47,772 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_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 334dc4437eaac80eceb8d1af75e80c429404d34e2c4d4fc214f68fc3c74220fb [2023-11-19 07:37:48,083 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:37:48,114 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:37:48,117 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:37:48,119 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:37:48,119 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:37:48,120 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-72.i [2023-11-19 07:37:51,349 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:37:51,632 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:37:51,637 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-72.i [2023-11-19 07:37:51,652 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/data/c8d6c40a0/d0648c3527ac41268a924fe330c20646/FLAG4b083b14e [2023-11-19 07:37:51,667 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/data/c8d6c40a0/d0648c3527ac41268a924fe330c20646 [2023-11-19 07:37:51,669 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:37:51,671 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:37:51,673 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:37:51,673 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:37:51,679 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:37:51,680 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:37:51" (1/1) ... [2023-11-19 07:37:51,681 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c81ef9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:51, skipping insertion in model container [2023-11-19 07:37:51,681 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:37:51" (1/1) ... [2023-11-19 07:37:51,743 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:37:51,904 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_e637ce0f-f5f4-4358-9eda-e49a3062f963/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-72.i[916,929] [2023-11-19 07:37:52,105 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:37:52,120 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:37:52,133 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_e637ce0f-f5f4-4358-9eda-e49a3062f963/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-72.i[916,929] [2023-11-19 07:37:52,205 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:37:52,226 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:37:52,226 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:52 WrapperNode [2023-11-19 07:37:52,226 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:37:52,227 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:37:52,228 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:37:52,228 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:37:52,245 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:52" (1/1) ... [2023-11-19 07:37:52,265 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:52" (1/1) ... [2023-11-19 07:37:52,374 INFO L138 Inliner]: procedures = 26, calls = 67, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 447 [2023-11-19 07:37:52,374 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:37:52,375 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:37:52,375 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:37:52,375 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:37:52,384 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:52" (1/1) ... [2023-11-19 07:37:52,385 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:52" (1/1) ... [2023-11-19 07:37:52,393 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:52" (1/1) ... [2023-11-19 07:37:52,393 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:52" (1/1) ... [2023-11-19 07:37:52,419 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:52" (1/1) ... [2023-11-19 07:37:52,424 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:52" (1/1) ... [2023-11-19 07:37:52,431 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:52" (1/1) ... [2023-11-19 07:37:52,437 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:52" (1/1) ... [2023-11-19 07:37:52,446 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:37:52,447 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:37:52,447 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:37:52,447 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:37:52,448 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:52" (1/1) ... [2023-11-19 07:37:52,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:37:52,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:52,489 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:37:52,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:37:52,542 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:37:52,542 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 07:37:52,542 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 07:37:52,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:37:52,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:37:52,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:37:52,696 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:37:52,699 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:37:53,711 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:37:53,727 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:37:53,727 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 07:37:53,738 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:37:53 BoogieIcfgContainer [2023-11-19 07:37:53,739 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:37:53,745 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:37:53,745 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:37:53,749 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:37:53,749 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:37:51" (1/3) ... [2023-11-19 07:37:53,750 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65d719cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:37:53, skipping insertion in model container [2023-11-19 07:37:53,750 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:52" (2/3) ... [2023-11-19 07:37:53,750 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65d719cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:37:53, skipping insertion in model container [2023-11-19 07:37:53,751 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:37:53" (3/3) ... [2023-11-19 07:37:53,752 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-72.i [2023-11-19 07:37:53,774 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:37:53,774 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:37:53,857 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:37:53,865 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;@42fd2326, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:37:53,866 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:37:53,873 INFO L276 IsEmpty]: Start isEmpty. Operand has 183 states, 126 states have (on average 1.507936507936508) internal successors, (190), 127 states have internal predecessors, (190), 54 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2023-11-19 07:37:53,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2023-11-19 07:37:53,914 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:53,916 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:53,917 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:53,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:53,925 INFO L85 PathProgramCache]: Analyzing trace with hash 731588001, now seen corresponding path program 1 times [2023-11-19 07:37:53,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:53,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645352541] [2023-11-19 07:37:53,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:53,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:54,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:54,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:54,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645352541] [2023-11-19 07:37:54,367 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 07:37:54,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539304274] [2023-11-19 07:37:54,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:54,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:54,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:54,374 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:54,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:37:54,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:54,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 854 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 07:37:54,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:54,877 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 5618 trivial. 0 not checked. [2023-11-19 07:37:54,877 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:37:54,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539304274] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:54,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:54,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:37:54,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839842637] [2023-11-19 07:37:54,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:54,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:37:54,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:54,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:37:54,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:37:54,932 INFO L87 Difference]: Start difference. First operand has 183 states, 126 states have (on average 1.507936507936508) internal successors, (190), 127 states have internal predecessors, (190), 54 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) Second operand has 2 states, 2 states have (on average 44.5) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (54), 2 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 2 states have call successors, (54) [2023-11-19 07:37:54,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:54,987 INFO L93 Difference]: Finished difference Result 358 states and 642 transitions. [2023-11-19 07:37:54,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:37:54,989 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 44.5) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (54), 2 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 2 states have call successors, (54) Word has length 354 [2023-11-19 07:37:54,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:55,000 INFO L225 Difference]: With dead ends: 358 [2023-11-19 07:37:55,001 INFO L226 Difference]: Without dead ends: 178 [2023-11-19 07:37:55,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:37:55,017 INFO L413 NwaCegarLoop]: 288 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, 288 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 [2023-11-19 07:37:55,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:37:55,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-11-19 07:37:55,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2023-11-19 07:37:55,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 122 states have (on average 1.4754098360655739) internal successors, (180), 122 states have internal predecessors, (180), 54 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2023-11-19 07:37:55,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 288 transitions. [2023-11-19 07:37:55,103 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 288 transitions. Word has length 354 [2023-11-19 07:37:55,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:55,104 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 288 transitions. [2023-11-19 07:37:55,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 44.5) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (54), 2 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 2 states have call successors, (54) [2023-11-19 07:37:55,105 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 288 transitions. [2023-11-19 07:37:55,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2023-11-19 07:37:55,124 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:55,125 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:55,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:55,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:55,341 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:55,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:55,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1134782887, now seen corresponding path program 1 times [2023-11-19 07:37:55,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:55,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005376515] [2023-11-19 07:37:55,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:55,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:55,460 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:37:55,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [488342084] [2023-11-19 07:37:55,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:55,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:55,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:55,469 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:55,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:37:55,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:55,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 854 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:37:55,828 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:55,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5724 trivial. 0 not checked. [2023-11-19 07:37:55,974 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:37:55,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:55,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005376515] [2023-11-19 07:37:55,977 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:37:55,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488342084] [2023-11-19 07:37:55,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488342084] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:55,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:55,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:37:55,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890201925] [2023-11-19 07:37:55,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:55,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:37:55,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:55,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:37:55,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:55,985 INFO L87 Difference]: Start difference. First operand 178 states and 288 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) [2023-11-19 07:37:56,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:56,126 INFO L93 Difference]: Finished difference Result 420 states and 682 transitions. [2023-11-19 07:37:56,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:37:56,130 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) Word has length 354 [2023-11-19 07:37:56,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:56,143 INFO L225 Difference]: With dead ends: 420 [2023-11-19 07:37:56,143 INFO L226 Difference]: Without dead ends: 245 [2023-11-19 07:37:56,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:56,147 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 96 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:56,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 613 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:37:56,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2023-11-19 07:37:56,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 203. [2023-11-19 07:37:56,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 147 states have (on average 1.530612244897959) internal successors, (225), 147 states have internal predecessors, (225), 54 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2023-11-19 07:37:56,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 333 transitions. [2023-11-19 07:37:56,193 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 333 transitions. Word has length 354 [2023-11-19 07:37:56,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:56,198 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 333 transitions. [2023-11-19 07:37:56,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) [2023-11-19 07:37:56,200 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 333 transitions. [2023-11-19 07:37:56,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2023-11-19 07:37:56,205 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:56,206 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:56,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:56,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:56,420 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:56,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:56,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1788377111, now seen corresponding path program 1 times [2023-11-19 07:37:56,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:56,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165877776] [2023-11-19 07:37:56,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:56,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:56,553 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:37:56,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [735667971] [2023-11-19 07:37:56,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:56,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:56,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:56,556 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:56,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:37:56,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:56,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 855 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:37:56,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:57,648 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 1355 proven. 138 refuted. 0 times theorem prover too weak. 4231 trivial. 0 not checked. [2023-11-19 07:37:57,654 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:37:58,178 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 21 proven. 138 refuted. 0 times theorem prover too weak. 5565 trivial. 0 not checked. [2023-11-19 07:37:58,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:58,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165877776] [2023-11-19 07:37:58,179 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:37:58,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735667971] [2023-11-19 07:37:58,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735667971] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:37:58,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:37:58,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-11-19 07:37:58,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383823525] [2023-11-19 07:37:58,181 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:37:58,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:37:58,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:58,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:37:58,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:37:58,188 INFO L87 Difference]: Start difference. First operand 203 states and 333 transitions. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 2 states have call successors, (100), 2 states have call predecessors, (100), 4 states have return successors, (101), 2 states have call predecessors, (101), 2 states have call successors, (101) [2023-11-19 07:37:58,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:58,982 INFO L93 Difference]: Finished difference Result 524 states and 854 transitions. [2023-11-19 07:37:58,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 07:37:58,984 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 2 states have call successors, (100), 2 states have call predecessors, (100), 4 states have return successors, (101), 2 states have call predecessors, (101), 2 states have call successors, (101) Word has length 354 [2023-11-19 07:37:58,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:58,988 INFO L225 Difference]: With dead ends: 524 [2023-11-19 07:37:58,989 INFO L226 Difference]: Without dead ends: 324 [2023-11-19 07:37:58,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 713 GetRequests, 698 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:37:58,992 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 381 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:58,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [393 Valid, 704 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 07:37:58,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2023-11-19 07:37:59,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 315. [2023-11-19 07:37:59,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 251 states have (on average 1.5537848605577689) internal successors, (390), 252 states have internal predecessors, (390), 60 states have call successors, (60), 3 states have call predecessors, (60), 3 states have return successors, (60), 59 states have call predecessors, (60), 60 states have call successors, (60) [2023-11-19 07:37:59,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 510 transitions. [2023-11-19 07:37:59,035 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 510 transitions. Word has length 354 [2023-11-19 07:37:59,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:59,037 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 510 transitions. [2023-11-19 07:37:59,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 2 states have call successors, (100), 2 states have call predecessors, (100), 4 states have return successors, (101), 2 states have call predecessors, (101), 2 states have call successors, (101) [2023-11-19 07:37:59,037 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 510 transitions. [2023-11-19 07:37:59,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2023-11-19 07:37:59,041 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:59,041 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:59,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:59,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:59,265 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:59,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:59,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1804990311, now seen corresponding path program 1 times [2023-11-19 07:37:59,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:59,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354848900] [2023-11-19 07:37:59,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:59,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:59,340 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:37:59,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1806270560] [2023-11-19 07:37:59,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:59,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:59,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:59,342 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:59,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:37:59,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:59,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 856 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:37:59,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:59,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5724 trivial. 0 not checked. [2023-11-19 07:37:59,808 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:37:59,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:59,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354848900] [2023-11-19 07:37:59,808 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:37:59,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806270560] [2023-11-19 07:37:59,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806270560] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:59,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:59,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:37:59,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217597682] [2023-11-19 07:37:59,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:59,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:37:59,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:59,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:37:59,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:37:59,812 INFO L87 Difference]: Start difference. First operand 315 states and 510 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) [2023-11-19 07:38:00,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:00,313 INFO L93 Difference]: Finished difference Result 931 states and 1494 transitions. [2023-11-19 07:38:00,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:38:00,314 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) Word has length 354 [2023-11-19 07:38:00,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:00,321 INFO L225 Difference]: With dead ends: 931 [2023-11-19 07:38:00,321 INFO L226 Difference]: Without dead ends: 619 [2023-11-19 07:38:00,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:38:00,324 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 573 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:00,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [573 Valid, 795 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 07:38:00,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2023-11-19 07:38:00,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 460. [2023-11-19 07:38:00,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 346 states have (on average 1.5144508670520231) internal successors, (524), 347 states have internal predecessors, (524), 108 states have call successors, (108), 5 states have call predecessors, (108), 5 states have return successors, (108), 107 states have call predecessors, (108), 108 states have call successors, (108) [2023-11-19 07:38:00,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 740 transitions. [2023-11-19 07:38:00,413 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 740 transitions. Word has length 354 [2023-11-19 07:38:00,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:38:00,414 INFO L495 AbstractCegarLoop]: Abstraction has 460 states and 740 transitions. [2023-11-19 07:38:00,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) [2023-11-19 07:38:00,415 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 740 transitions. [2023-11-19 07:38:00,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2023-11-19 07:38:00,419 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:00,420 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:00,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:00,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:00,636 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:38:00,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:00,637 INFO L85 PathProgramCache]: Analyzing trace with hash 801033243, now seen corresponding path program 1 times [2023-11-19 07:38:00,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:00,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550339321] [2023-11-19 07:38:00,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:00,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:00,716 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:38:00,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [300749254] [2023-11-19 07:38:00,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:00,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:00,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:00,719 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:38:00,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:38:01,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:01,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 857 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:38:01,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:38:01,639 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 1023 proven. 144 refuted. 0 times theorem prover too weak. 4557 trivial. 0 not checked. [2023-11-19 07:38:01,639 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:38:02,060 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 15 proven. 144 refuted. 0 times theorem prover too weak. 5565 trivial. 0 not checked. [2023-11-19 07:38:02,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:02,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550339321] [2023-11-19 07:38:02,065 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:38:02,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300749254] [2023-11-19 07:38:02,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300749254] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:38:02,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:38:02,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-11-19 07:38:02,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262634952] [2023-11-19 07:38:02,067 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:38:02,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:38:02,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:02,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:38:02,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:38:02,073 INFO L87 Difference]: Start difference. First operand 460 states and 740 transitions. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 2 states have call successors, (102), 2 states have call predecessors, (102), 4 states have return successors, (103), 2 states have call predecessors, (103), 2 states have call successors, (103) [2023-11-19 07:38:03,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:03,113 INFO L93 Difference]: Finished difference Result 1300 states and 2055 transitions. [2023-11-19 07:38:03,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-19 07:38:03,114 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 2 states have call successors, (102), 2 states have call predecessors, (102), 4 states have return successors, (103), 2 states have call predecessors, (103), 2 states have call successors, (103) Word has length 354 [2023-11-19 07:38:03,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:03,125 INFO L225 Difference]: With dead ends: 1300 [2023-11-19 07:38:03,125 INFO L226 Difference]: Without dead ends: 834 [2023-11-19 07:38:03,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 718 GetRequests, 699 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2023-11-19 07:38:03,129 INFO L413 NwaCegarLoop]: 388 mSDtfsCounter, 434 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 1151 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:03,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [440 Valid, 1151 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 07:38:03,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2023-11-19 07:38:03,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 520. [2023-11-19 07:38:03,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 404 states have (on average 1.5222772277227723) internal successors, (615), 405 states have internal predecessors, (615), 108 states have call successors, (108), 7 states have call predecessors, (108), 7 states have return successors, (108), 107 states have call predecessors, (108), 108 states have call successors, (108) [2023-11-19 07:38:03,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 831 transitions. [2023-11-19 07:38:03,274 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 831 transitions. Word has length 354 [2023-11-19 07:38:03,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:38:03,275 INFO L495 AbstractCegarLoop]: Abstraction has 520 states and 831 transitions. [2023-11-19 07:38:03,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 2 states have call successors, (102), 2 states have call predecessors, (102), 4 states have return successors, (103), 2 states have call predecessors, (103), 2 states have call successors, (103) [2023-11-19 07:38:03,276 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 831 transitions. [2023-11-19 07:38:03,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2023-11-19 07:38:03,281 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:03,282 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:03,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:03,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:03,497 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:38:03,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:03,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1004405091, now seen corresponding path program 1 times [2023-11-19 07:38:03,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:03,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086279739] [2023-11-19 07:38:03,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:03,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:03,583 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:38:03,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [75052576] [2023-11-19 07:38:03,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:03,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:03,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:03,586 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:38:03,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:38:03,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:03,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:38:03,983 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:38:04,605 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 659 proven. 150 refuted. 0 times theorem prover too weak. 4915 trivial. 0 not checked. [2023-11-19 07:38:04,605 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:38:04,800 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5724 trivial. 0 not checked. [2023-11-19 07:38:04,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:04,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086279739] [2023-11-19 07:38:04,801 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:38:04,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75052576] [2023-11-19 07:38:04,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75052576] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:38:04,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:38:04,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-11-19 07:38:04,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387456049] [2023-11-19 07:38:04,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:38:04,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:38:04,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:04,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:38:04,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:38:04,805 INFO L87 Difference]: Start difference. First operand 520 states and 831 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) [2023-11-19 07:38:05,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:05,147 INFO L93 Difference]: Finished difference Result 1057 states and 1702 transitions. [2023-11-19 07:38:05,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:38:05,148 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) Word has length 354 [2023-11-19 07:38:05,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:05,152 INFO L225 Difference]: With dead ends: 1057 [2023-11-19 07:38:05,153 INFO L226 Difference]: Without dead ends: 540 [2023-11-19 07:38:05,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 706 GetRequests, 699 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:38:05,159 INFO L413 NwaCegarLoop]: 277 mSDtfsCounter, 324 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 744 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:05,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 744 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 07:38:05,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2023-11-19 07:38:05,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 461. [2023-11-19 07:38:05,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 345 states have (on average 1.5072463768115942) internal successors, (520), 346 states have internal predecessors, (520), 108 states have call successors, (108), 7 states have call predecessors, (108), 7 states have return successors, (108), 107 states have call predecessors, (108), 108 states have call successors, (108) [2023-11-19 07:38:05,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 736 transitions. [2023-11-19 07:38:05,225 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 736 transitions. Word has length 354 [2023-11-19 07:38:05,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:38:05,226 INFO L495 AbstractCegarLoop]: Abstraction has 461 states and 736 transitions. [2023-11-19 07:38:05,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) [2023-11-19 07:38:05,227 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 736 transitions. [2023-11-19 07:38:05,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2023-11-19 07:38:05,232 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:05,232 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:05,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:05,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:05,453 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:38:05,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:05,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1556843817, now seen corresponding path program 1 times [2023-11-19 07:38:05,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:05,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37550212] [2023-11-19 07:38:05,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:05,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:05,528 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:38:05,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [926211523] [2023-11-19 07:38:05,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:05,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:05,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:05,530 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:38:05,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:38:05,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:05,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:38:05,922 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:38:06,031 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5724 trivial. 0 not checked. [2023-11-19 07:38:06,031 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:38:06,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:06,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37550212] [2023-11-19 07:38:06,032 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:38:06,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926211523] [2023-11-19 07:38:06,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926211523] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:38:06,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:38:06,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:38:06,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586974361] [2023-11-19 07:38:06,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:38:06,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:38:06,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:06,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:38:06,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:38:06,036 INFO L87 Difference]: Start difference. First operand 461 states and 736 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) [2023-11-19 07:38:06,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:06,339 INFO L93 Difference]: Finished difference Result 1221 states and 1927 transitions. [2023-11-19 07:38:06,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:38:06,340 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) Word has length 354 [2023-11-19 07:38:06,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:06,347 INFO L225 Difference]: With dead ends: 1221 [2023-11-19 07:38:06,347 INFO L226 Difference]: Without dead ends: 745 [2023-11-19 07:38:06,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:38:06,350 INFO L413 NwaCegarLoop]: 316 mSDtfsCounter, 478 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:06,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [478 Valid, 575 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:38:06,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2023-11-19 07:38:06,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 463. [2023-11-19 07:38:06,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 347 states have (on average 1.4812680115273775) internal successors, (514), 348 states have internal predecessors, (514), 108 states have call successors, (108), 7 states have call predecessors, (108), 7 states have return successors, (108), 107 states have call predecessors, (108), 108 states have call successors, (108) [2023-11-19 07:38:06,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 730 transitions. [2023-11-19 07:38:06,426 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 730 transitions. Word has length 354 [2023-11-19 07:38:06,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:38:06,427 INFO L495 AbstractCegarLoop]: Abstraction has 463 states and 730 transitions. [2023-11-19 07:38:06,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) [2023-11-19 07:38:06,427 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 730 transitions. [2023-11-19 07:38:06,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2023-11-19 07:38:06,431 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:06,432 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:06,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:06,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:06,655 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:38:06,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:06,656 INFO L85 PathProgramCache]: Analyzing trace with hash -756258597, now seen corresponding path program 1 times [2023-11-19 07:38:06,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:06,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249628929] [2023-11-19 07:38:06,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:06,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:06,742 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:38:06,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1798182050] [2023-11-19 07:38:06,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:06,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:06,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:06,748 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:38:06,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:38:07,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:07,182 INFO L262 TraceCheckSpWp]: Trace formula consists of 863 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-19 07:38:07,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:38:08,469 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 2933 proven. 162 refuted. 0 times theorem prover too weak. 2629 trivial. 0 not checked. [2023-11-19 07:38:08,470 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:38:09,911 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 75 proven. 84 refuted. 0 times theorem prover too weak. 5565 trivial. 0 not checked. [2023-11-19 07:38:09,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:09,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249628929] [2023-11-19 07:38:09,912 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:38:09,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798182050] [2023-11-19 07:38:09,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798182050] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:38:09,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:38:09,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2023-11-19 07:38:09,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580470413] [2023-11-19 07:38:09,913 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:38:09,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:38:09,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:09,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:38:09,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:38:09,916 INFO L87 Difference]: Start difference. First operand 463 states and 730 transitions. Second operand has 15 states, 15 states have (on average 8.266666666666667) internal successors, (124), 14 states have internal predecessors, (124), 4 states have call successors, (82), 3 states have call predecessors, (82), 5 states have return successors, (83), 4 states have call predecessors, (83), 4 states have call successors, (83) [2023-11-19 07:38:10,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:10,703 INFO L93 Difference]: Finished difference Result 945 states and 1470 transitions. [2023-11-19 07:38:10,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 07:38:10,704 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 8.266666666666667) internal successors, (124), 14 states have internal predecessors, (124), 4 states have call successors, (82), 3 states have call predecessors, (82), 5 states have return successors, (83), 4 states have call predecessors, (83), 4 states have call successors, (83) Word has length 354 [2023-11-19 07:38:10,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:10,708 INFO L225 Difference]: With dead ends: 945 [2023-11-19 07:38:10,708 INFO L226 Difference]: Without dead ends: 485 [2023-11-19 07:38:10,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 713 GetRequests, 693 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2023-11-19 07:38:10,711 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 455 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 960 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:10,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 960 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 07:38:10,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2023-11-19 07:38:10,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 471. [2023-11-19 07:38:10,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 351 states have (on average 1.4301994301994303) internal successors, (502), 352 states have internal predecessors, (502), 108 states have call successors, (108), 11 states have call predecessors, (108), 11 states have return successors, (108), 107 states have call predecessors, (108), 108 states have call successors, (108) [2023-11-19 07:38:10,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 718 transitions. [2023-11-19 07:38:10,779 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 718 transitions. Word has length 354 [2023-11-19 07:38:10,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:38:10,780 INFO L495 AbstractCegarLoop]: Abstraction has 471 states and 718 transitions. [2023-11-19 07:38:10,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.266666666666667) internal successors, (124), 14 states have internal predecessors, (124), 4 states have call successors, (82), 3 states have call predecessors, (82), 5 states have return successors, (83), 4 states have call predecessors, (83), 4 states have call successors, (83) [2023-11-19 07:38:10,780 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 718 transitions. [2023-11-19 07:38:10,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2023-11-19 07:38:10,784 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:10,784 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:10,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:10,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:10,993 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:38:10,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:10,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1785617895, now seen corresponding path program 1 times [2023-11-19 07:38:10,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:10,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139602237] [2023-11-19 07:38:10,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:10,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:11,086 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:38:11,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1423064628] [2023-11-19 07:38:11,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:11,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:11,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:11,089 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:38:11,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:38:11,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:11,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 863 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-19 07:38:11,519 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:38:12,859 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 2933 proven. 162 refuted. 0 times theorem prover too weak. 2629 trivial. 0 not checked. [2023-11-19 07:38:12,859 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:38:13,196 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5724 trivial. 0 not checked. [2023-11-19 07:38:13,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:13,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139602237] [2023-11-19 07:38:13,197 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:38:13,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423064628] [2023-11-19 07:38:13,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423064628] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:38:13,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:38:13,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 16 [2023-11-19 07:38:13,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309099248] [2023-11-19 07:38:13,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:38:13,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:38:13,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:13,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:38:13,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:38:13,201 INFO L87 Difference]: Start difference. First operand 471 states and 718 transitions. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) [2023-11-19 07:38:14,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:14,648 INFO L93 Difference]: Finished difference Result 2365 states and 3664 transitions. [2023-11-19 07:38:14,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:38:14,649 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) Word has length 354 [2023-11-19 07:38:14,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:14,668 INFO L225 Difference]: With dead ends: 2365 [2023-11-19 07:38:14,680 INFO L226 Difference]: Without dead ends: 1897 [2023-11-19 07:38:14,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 711 GetRequests, 693 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2023-11-19 07:38:14,685 INFO L413 NwaCegarLoop]: 420 mSDtfsCounter, 1316 mSDsluCounter, 1122 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 331 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1316 SdHoareTripleChecker+Valid, 1542 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 331 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:14,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1316 Valid, 1542 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [331 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-19 07:38:14,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1897 states. [2023-11-19 07:38:14,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1897 to 1255. [2023-11-19 07:38:14,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 959 states have (on average 1.4483837330552658) internal successors, (1389), 963 states have internal predecessors, (1389), 266 states have call successors, (266), 29 states have call predecessors, (266), 29 states have return successors, (266), 262 states have call predecessors, (266), 266 states have call successors, (266) [2023-11-19 07:38:14,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 1921 transitions. [2023-11-19 07:38:14,967 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 1921 transitions. Word has length 354 [2023-11-19 07:38:14,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:38:14,967 INFO L495 AbstractCegarLoop]: Abstraction has 1255 states and 1921 transitions. [2023-11-19 07:38:14,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) [2023-11-19 07:38:14,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 1921 transitions. [2023-11-19 07:38:14,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2023-11-19 07:38:14,972 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:14,973 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:14,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:15,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:15,182 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:38:15,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:15,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1418220183, now seen corresponding path program 1 times [2023-11-19 07:38:15,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:15,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965273960] [2023-11-19 07:38:15,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:15,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:15,264 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:38:15,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1071852592] [2023-11-19 07:38:15,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:15,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:15,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:15,280 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:38:15,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:38:15,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:15,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 862 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-19 07:38:15,750 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:38:17,152 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 2103 proven. 36 refuted. 0 times theorem prover too weak. 3585 trivial. 0 not checked. [2023-11-19 07:38:17,152 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:38:17,784 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5724 trivial. 0 not checked. [2023-11-19 07:38:17,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:17,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965273960] [2023-11-19 07:38:17,785 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:38:17,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071852592] [2023-11-19 07:38:17,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071852592] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:38:17,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:38:17,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7] total 15 [2023-11-19 07:38:17,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194998180] [2023-11-19 07:38:17,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:38:17,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 07:38:17,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:17,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 07:38:17,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:38:17,789 INFO L87 Difference]: Start difference. First operand 1255 states and 1921 transitions. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 2 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 2 states have call predecessors, (54), 2 states have call successors, (54) [2023-11-19 07:38:22,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:22,085 INFO L93 Difference]: Finished difference Result 8147 states and 12143 transitions. [2023-11-19 07:38:22,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-19 07:38:22,086 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 2 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 2 states have call predecessors, (54), 2 states have call successors, (54) Word has length 354 [2023-11-19 07:38:22,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:22,134 INFO L225 Difference]: With dead ends: 8147 [2023-11-19 07:38:22,134 INFO L226 Difference]: Without dead ends: 6895 [2023-11-19 07:38:22,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 734 GetRequests, 701 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=263, Invalid=927, Unknown=0, NotChecked=0, Total=1190 [2023-11-19 07:38:22,141 INFO L413 NwaCegarLoop]: 326 mSDtfsCounter, 3000 mSDsluCounter, 1208 mSDsCounter, 0 mSdLazyCounter, 976 mSolverCounterSat, 1524 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3000 SdHoareTripleChecker+Valid, 1534 SdHoareTripleChecker+Invalid, 2500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1524 IncrementalHoareTripleChecker+Valid, 976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:22,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3000 Valid, 1534 Invalid, 2500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1524 Valid, 976 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-11-19 07:38:22,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6895 states. [2023-11-19 07:38:22,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6895 to 5227. [2023-11-19 07:38:22,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5227 states, 4013 states have (on average 1.413904809369549) internal successors, (5674), 4043 states have internal predecessors, (5674), 1048 states have call successors, (1048), 165 states have call predecessors, (1048), 165 states have return successors, (1048), 1018 states have call predecessors, (1048), 1048 states have call successors, (1048) [2023-11-19 07:38:22,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5227 states to 5227 states and 7770 transitions. [2023-11-19 07:38:22,981 INFO L78 Accepts]: Start accepts. Automaton has 5227 states and 7770 transitions. Word has length 354 [2023-11-19 07:38:22,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:38:22,982 INFO L495 AbstractCegarLoop]: Abstraction has 5227 states and 7770 transitions. [2023-11-19 07:38:22,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 2 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 2 states have call predecessors, (54), 2 states have call successors, (54) [2023-11-19 07:38:22,982 INFO L276 IsEmpty]: Start isEmpty. Operand 5227 states and 7770 transitions. [2023-11-19 07:38:23,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2023-11-19 07:38:23,026 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:23,026 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:23,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:23,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 07:38:23,227 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:38:23,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:23,228 INFO L85 PathProgramCache]: Analyzing trace with hash 600571733, now seen corresponding path program 1 times [2023-11-19 07:38:23,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:23,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101552341] [2023-11-19 07:38:23,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:23,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:23,287 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:38:23,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1112710045] [2023-11-19 07:38:23,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:23,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:23,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:23,289 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:38:23,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 07:38:23,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:23,701 INFO L262 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:38:23,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:38:24,850 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5724 trivial. 0 not checked. [2023-11-19 07:38:24,850 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:38:24,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:24,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101552341] [2023-11-19 07:38:24,851 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:38:24,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112710045] [2023-11-19 07:38:24,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112710045] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:38:24,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:38:24,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:38:24,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023636251] [2023-11-19 07:38:24,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:38:24,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:38:24,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:24,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:38:24,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:38:24,854 INFO L87 Difference]: Start difference. First operand 5227 states and 7770 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) [2023-11-19 07:38:25,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:25,673 INFO L93 Difference]: Finished difference Result 8444 states and 12537 transitions. [2023-11-19 07:38:25,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:38:25,674 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) Word has length 354 [2023-11-19 07:38:25,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:25,698 INFO L225 Difference]: With dead ends: 8444 [2023-11-19 07:38:25,698 INFO L226 Difference]: Without dead ends: 3212 [2023-11-19 07:38:25,712 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 [2023-11-19 07:38:25,712 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 448 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:25,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 867 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 07:38:25,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3212 states. [2023-11-19 07:38:26,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3212 to 3027. [2023-11-19 07:38:26,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3027 states, 2284 states have (on average 1.3927320490367776) internal successors, (3181), 2302 states have internal predecessors, (3181), 645 states have call successors, (645), 97 states have call predecessors, (645), 97 states have return successors, (645), 627 states have call predecessors, (645), 645 states have call successors, (645) [2023-11-19 07:38:26,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3027 states to 3027 states and 4471 transitions. [2023-11-19 07:38:26,256 INFO L78 Accepts]: Start accepts. Automaton has 3027 states and 4471 transitions. Word has length 354 [2023-11-19 07:38:26,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:38:26,257 INFO L495 AbstractCegarLoop]: Abstraction has 3027 states and 4471 transitions. [2023-11-19 07:38:26,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 1 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) [2023-11-19 07:38:26,257 INFO L276 IsEmpty]: Start isEmpty. Operand 3027 states and 4471 transitions. [2023-11-19 07:38:26,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2023-11-19 07:38:26,262 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:26,262 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:26,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:26,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:26,484 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:38:26,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:26,485 INFO L85 PathProgramCache]: Analyzing trace with hash 265366103, now seen corresponding path program 1 times [2023-11-19 07:38:26,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:26,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330851] [2023-11-19 07:38:26,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:26,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:26,541 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:38:26,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [269698710] [2023-11-19 07:38:26,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:26,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:26,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:26,543 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:38:26,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637ce0f-f5f4-4358-9eda-e49a3062f963/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 07:38:26,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:26,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-19 07:38:26,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:38:32,310 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 659 proven. 150 refuted. 0 times theorem prover too weak. 4915 trivial. 0 not checked. [2023-11-19 07:38:32,310 INFO L327 TraceCheckSpWp]: Computing backward predicates...