./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-sp_file-18.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/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_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-sp_file-18.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/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_5c89ea95-a40e-4b91-883f-efb1389e1462/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 378186c6d9208dcac7e742ba7e3d709cb5ca4759d0a6109e61503d5010b43317 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:34:16,378 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:34:16,464 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:34:16,469 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:34:16,469 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:34:16,493 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:34:16,494 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:34:16,495 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:34:16,496 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:34:16,497 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:34:16,498 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:34:16,498 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:34:16,499 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:34:16,500 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:34:16,500 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:34:16,501 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:34:16,502 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:34:16,502 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:34:16,503 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:34:16,504 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:34:16,504 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:34:16,505 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:34:16,506 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:34:16,507 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:34:16,507 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:34:16,508 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:34:16,509 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:34:16,509 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:34:16,510 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:34:16,511 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:34:16,511 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:34:16,512 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:34:16,512 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:34:16,513 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:34:16,513 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:34:16,514 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:34:16,514 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:34:16,515 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:34:16,515 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:34:16,515 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_5c89ea95-a40e-4b91-883f-efb1389e1462/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 378186c6d9208dcac7e742ba7e3d709cb5ca4759d0a6109e61503d5010b43317 [2023-11-19 07:34:16,836 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:34:16,867 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:34:16,870 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:34:16,872 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:34:16,872 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:34:16,874 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-sp_file-18.i [2023-11-19 07:34:19,893 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:34:20,173 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:34:20,173 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-sp_file-18.i [2023-11-19 07:34:20,184 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/data/6dcadef00/06120a8b0feb4ccdafe10b5a417f0bae/FLAG431ae61a5 [2023-11-19 07:34:20,199 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/data/6dcadef00/06120a8b0feb4ccdafe10b5a417f0bae [2023-11-19 07:34:20,202 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:34:20,203 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:34:20,205 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:34:20,205 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:34:20,211 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:34:20,212 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:34:20" (1/1) ... [2023-11-19 07:34:20,213 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ae27894 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:20, skipping insertion in model container [2023-11-19 07:34:20,214 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:34:20" (1/1) ... [2023-11-19 07:34:20,246 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:34:20,407 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_5c89ea95-a40e-4b91-883f-efb1389e1462/sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-sp_file-18.i[917,930] [2023-11-19 07:34:20,464 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:34:20,477 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:34:20,490 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_5c89ea95-a40e-4b91-883f-efb1389e1462/sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-sp_file-18.i[917,930] [2023-11-19 07:34:20,530 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:34:20,553 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:34:20,554 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:20 WrapperNode [2023-11-19 07:34:20,554 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:34:20,555 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:34:20,556 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:34:20,556 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:34:20,565 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:20" (1/1) ... [2023-11-19 07:34:20,584 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:20" (1/1) ... [2023-11-19 07:34:20,648 INFO L138 Inliner]: procedures = 29, calls = 139, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 431 [2023-11-19 07:34:20,649 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:34:20,650 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:34:20,650 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:34:20,650 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:34:20,665 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:20" (1/1) ... [2023-11-19 07:34:20,665 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:20" (1/1) ... [2023-11-19 07:34:20,673 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:20" (1/1) ... [2023-11-19 07:34:20,680 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:20" (1/1) ... [2023-11-19 07:34:20,708 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:20" (1/1) ... [2023-11-19 07:34:20,727 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:20" (1/1) ... [2023-11-19 07:34:20,730 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:20" (1/1) ... [2023-11-19 07:34:20,734 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:20" (1/1) ... [2023-11-19 07:34:20,740 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:34:20,741 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:34:20,742 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:34:20,742 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:34:20,743 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:20" (1/1) ... [2023-11-19 07:34:20,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:34:20,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:20,790 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:34:20,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:34:20,846 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:34:20,846 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2023-11-19 07:34:20,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:34:20,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2023-11-19 07:34:20,847 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:34:20,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2023-11-19 07:34:20,848 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 07:34:20,848 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 07:34:20,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:34:20,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:34:20,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:34:21,018 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:34:21,030 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:34:21,648 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:34:21,672 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:34:21,673 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 07:34:21,677 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:34:21 BoogieIcfgContainer [2023-11-19 07:34:21,677 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:34:21,679 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:34:21,679 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:34:21,683 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:34:21,683 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:34:20" (1/3) ... [2023-11-19 07:34:21,684 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e27f7ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:34:21, skipping insertion in model container [2023-11-19 07:34:21,684 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:20" (2/3) ... [2023-11-19 07:34:21,684 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e27f7ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:34:21, skipping insertion in model container [2023-11-19 07:34:21,684 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:34:21" (3/3) ... [2023-11-19 07:34:21,699 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_variablewrapping_wrapper-sp_file-18.i [2023-11-19 07:34:21,719 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:34:21,719 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:34:21,773 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:34:21,781 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;@397aa5a3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:34:21,781 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:34:21,786 INFO L276 IsEmpty]: Start isEmpty. Operand has 104 states, 89 states have (on average 1.4831460674157304) internal successors, (132), 90 states have internal predecessors, (132), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-19 07:34:21,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-11-19 07:34:21,801 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:34:21,801 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:34:21,802 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:34:21,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:21,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1578952680, now seen corresponding path program 1 times [2023-11-19 07:34:21,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:21,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842382825] [2023-11-19 07:34:21,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:21,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:22,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:22,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:22,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842382825] [2023-11-19 07:34:22,119 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 07:34:22,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619741647] [2023-11-19 07:34:22,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:22,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:22,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:22,121 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:22,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:34:22,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:22,384 INFO L262 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 07:34:22,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:22,445 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2023-11-19 07:34:22,445 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:34:22,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619741647] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:34:22,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:34:22,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:34:22,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051992994] [2023-11-19 07:34:22,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:34:22,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:34:22,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:22,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:34:22,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:34:22,492 INFO L87 Difference]: Start difference. First operand has 104 states, 89 states have (on average 1.4831460674157304) internal successors, (132), 90 states have internal predecessors, (132), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 26.0) internal successors, (52), 2 states have internal predecessors, (52), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-19 07:34:22,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:34:22,536 INFO L93 Difference]: Finished difference Result 201 states and 318 transitions. [2023-11-19 07:34:22,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:34:22,539 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 26.0) internal successors, (52), 2 states have internal predecessors, (52), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) Word has length 107 [2023-11-19 07:34:22,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:34:22,551 INFO L225 Difference]: With dead ends: 201 [2023-11-19 07:34:22,551 INFO L226 Difference]: Without dead ends: 100 [2023-11-19 07:34:22,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 106 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 07:34:22,558 INFO L413 NwaCegarLoop]: 149 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, 149 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 07:34:22,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:34:22,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-11-19 07:34:22,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2023-11-19 07:34:22,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 86 states have (on average 1.4534883720930232) internal successors, (125), 86 states have internal predecessors, (125), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-19 07:34:22,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 149 transitions. [2023-11-19 07:34:22,615 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 149 transitions. Word has length 107 [2023-11-19 07:34:22,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:34:22,615 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 149 transitions. [2023-11-19 07:34:22,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 26.0) internal successors, (52), 2 states have internal predecessors, (52), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-19 07:34:22,616 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 149 transitions. [2023-11-19 07:34:22,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-11-19 07:34:22,620 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:34:22,620 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:34:22,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 07:34:22,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:22,842 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:34:22,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:22,843 INFO L85 PathProgramCache]: Analyzing trace with hash 239181460, now seen corresponding path program 1 times [2023-11-19 07:34:22,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:22,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386455889] [2023-11-19 07:34:22,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:22,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:22,912 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:34:22,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [609202877] [2023-11-19 07:34:22,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:22,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:22,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:22,940 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:22,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:34:23,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:23,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:34:23,168 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:23,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-19 07:34:23,267 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-11-19 07:34:23,267 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:34:23,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:23,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386455889] [2023-11-19 07:34:23,268 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:34:23,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609202877] [2023-11-19 07:34:23,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609202877] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:34:23,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:34:23,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:34:23,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715936907] [2023-11-19 07:34:23,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:34:23,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:34:23,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:23,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:34:23,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:34:23,273 INFO L87 Difference]: Start difference. First operand 100 states and 149 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-19 07:34:23,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:34:23,327 INFO L93 Difference]: Finished difference Result 199 states and 298 transitions. [2023-11-19 07:34:23,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:34:23,328 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 107 [2023-11-19 07:34:23,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:34:23,331 INFO L225 Difference]: With dead ends: 199 [2023-11-19 07:34:23,331 INFO L226 Difference]: Without dead ends: 102 [2023-11-19 07:34:23,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 104 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 07:34:23,334 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 14 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:34:23,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 417 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:34:23,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-11-19 07:34:23,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2023-11-19 07:34:23,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 87 states have (on average 1.4482758620689655) internal successors, (126), 87 states have internal predecessors, (126), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-19 07:34:23,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 150 transitions. [2023-11-19 07:34:23,349 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 150 transitions. Word has length 107 [2023-11-19 07:34:23,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:34:23,351 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 150 transitions. [2023-11-19 07:34:23,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-19 07:34:23,351 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 150 transitions. [2023-11-19 07:34:23,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-11-19 07:34:23,354 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:34:23,354 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:34:23,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:34:23,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:23,568 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:34:23,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:23,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1349166442, now seen corresponding path program 1 times [2023-11-19 07:34:23,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:23,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968840251] [2023-11-19 07:34:23,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:23,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:23,642 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:34:23,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [243920968] [2023-11-19 07:34:23,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:23,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:23,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:23,659 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:23,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:34:23,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:23,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-19 07:34:23,880 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:25,267 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-11-19 07:34:25,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-11-19 07:34:25,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:25,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:25,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:25,502 INFO L349 Elim1Store]: treesize reduction 45, result has 25.0 percent of original size [2023-11-19 07:34:25,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 38 [2023-11-19 07:34:25,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-19 07:34:25,576 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-11-19 07:34:25,576 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:34:25,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:25,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968840251] [2023-11-19 07:34:25,577 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:34:25,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243920968] [2023-11-19 07:34:25,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243920968] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:34:25,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:34:25,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 07:34:25,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847627571] [2023-11-19 07:34:25,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:34:25,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:34:25,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:25,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:34:25,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:34:25,580 INFO L87 Difference]: Start difference. First operand 101 states and 150 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-19 07:34:26,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:34:26,186 INFO L93 Difference]: Finished difference Result 241 states and 359 transitions. [2023-11-19 07:34:26,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:34:26,187 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 107 [2023-11-19 07:34:26,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:34:26,190 INFO L225 Difference]: With dead ends: 241 [2023-11-19 07:34:26,190 INFO L226 Difference]: Without dead ends: 143 [2023-11-19 07:34:26,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:34:26,193 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 464 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:34:26,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [464 Valid, 366 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 07:34:26,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-11-19 07:34:26,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 108. [2023-11-19 07:34:26,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 94 states have (on average 1.446808510638298) internal successors, (136), 94 states have internal predecessors, (136), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-19 07:34:26,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 160 transitions. [2023-11-19 07:34:26,211 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 160 transitions. Word has length 107 [2023-11-19 07:34:26,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:34:26,212 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 160 transitions. [2023-11-19 07:34:26,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-19 07:34:26,213 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 160 transitions. [2023-11-19 07:34:26,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-11-19 07:34:26,215 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:34:26,215 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:34:26,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:34:26,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:26,430 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:34:26,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:26,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1091001004, now seen corresponding path program 1 times [2023-11-19 07:34:26,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:26,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571100472] [2023-11-19 07:34:26,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:26,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:26,516 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:34:26,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [130332967] [2023-11-19 07:34:26,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:26,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:26,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:26,522 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:26,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:34:26,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:26,725 INFO L262 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-19 07:34:26,732 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:26,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-19 07:34:27,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-19 07:34:27,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-19 07:34:27,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-19 07:34:27,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-19 07:34:27,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-19 07:34:28,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-19 07:34:28,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:28,244 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-19 07:34:28,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 25 [2023-11-19 07:34:28,290 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2023-11-19 07:34:28,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:34:28,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:28,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571100472] [2023-11-19 07:34:28,390 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:34:28,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130332967] [2023-11-19 07:34:28,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130332967] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:34:28,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:34:28,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2023-11-19 07:34:28,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622467586] [2023-11-19 07:34:28,392 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-19 07:34:28,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:34:28,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:28,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:34:28,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:34:28,394 INFO L87 Difference]: Start difference. First operand 108 states and 160 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-19 07:34:28,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:34:28,761 INFO L93 Difference]: Finished difference Result 311 states and 464 transitions. [2023-11-19 07:34:28,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:34:28,762 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 107 [2023-11-19 07:34:28,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:34:28,764 INFO L225 Difference]: With dead ends: 311 [2023-11-19 07:34:28,765 INFO L226 Difference]: Without dead ends: 206 [2023-11-19 07:34:28,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:34:28,767 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 191 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:34:28,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 482 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 07:34:28,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2023-11-19 07:34:28,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 198. [2023-11-19 07:34:28,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 171 states have (on average 1.4502923976608186) internal successors, (248), 171 states have internal predecessors, (248), 24 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-19 07:34:28,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 296 transitions. [2023-11-19 07:34:28,797 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 296 transitions. Word has length 107 [2023-11-19 07:34:28,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:34:28,798 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 296 transitions. [2023-11-19 07:34:28,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-19 07:34:28,799 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 296 transitions. [2023-11-19 07:34:28,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-19 07:34:28,801 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:34:28,802 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:34:28,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:34:29,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:29,017 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:34:29,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:29,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1176525970, now seen corresponding path program 1 times [2023-11-19 07:34:29,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:29,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390722628] [2023-11-19 07:34:29,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:29,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:29,060 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:34:29,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [742947264] [2023-11-19 07:34:29,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:29,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:29,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:29,062 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:29,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:34:29,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:29,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-19 07:34:29,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:29,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-19 07:34:29,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-19 07:34:30,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-19 07:34:30,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-19 07:34:30,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-19 07:34:30,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-19 07:34:30,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-19 07:34:31,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:31,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:31,382 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-19 07:34:31,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 30 [2023-11-19 07:34:31,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:31,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:31,468 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:34:31,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 23 [2023-11-19 07:34:31,504 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 9 proven. 107 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-11-19 07:34:31,504 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:34:31,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:31,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390722628] [2023-11-19 07:34:31,923 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:34:31,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742947264] [2023-11-19 07:34:31,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742947264] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:34:31,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:34:31,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-11-19 07:34:31,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987072448] [2023-11-19 07:34:31,924 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-19 07:34:31,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:34:31,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:31,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:34:31,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=220, Unknown=1, NotChecked=0, Total=272 [2023-11-19 07:34:31,927 INFO L87 Difference]: Start difference. First operand 198 states and 296 transitions. Second operand has 12 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-19 07:34:33,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:34:33,834 INFO L93 Difference]: Finished difference Result 573 states and 849 transitions. [2023-11-19 07:34:33,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-19 07:34:33,835 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) Word has length 108 [2023-11-19 07:34:33,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:34:33,838 INFO L225 Difference]: With dead ends: 573 [2023-11-19 07:34:33,839 INFO L226 Difference]: Without dead ends: 366 [2023-11-19 07:34:33,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=185, Invalid=684, Unknown=1, NotChecked=0, Total=870 [2023-11-19 07:34:33,841 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 529 mSDsluCounter, 1071 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 21 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 1238 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:34:33,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [532 Valid, 1238 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 985 Invalid, 5 Unknown, 0 Unchecked, 1.2s Time] [2023-11-19 07:34:33,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2023-11-19 07:34:33,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 216. [2023-11-19 07:34:33,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 187 states have (on average 1.4224598930481283) internal successors, (266), 187 states have internal predecessors, (266), 24 states have call successors, (24), 4 states have call predecessors, (24), 4 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-19 07:34:33,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 314 transitions. [2023-11-19 07:34:33,874 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 314 transitions. Word has length 108 [2023-11-19 07:34:33,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:34:33,875 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 314 transitions. [2023-11-19 07:34:33,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-19 07:34:33,876 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 314 transitions. [2023-11-19 07:34:33,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-19 07:34:33,878 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:34:33,878 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:34:33,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:34:34,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:34,094 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:34:34,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:34,095 INFO L85 PathProgramCache]: Analyzing trace with hash -157052959, now seen corresponding path program 1 times [2023-11-19 07:34:34,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:34,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046038547] [2023-11-19 07:34:34,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:34,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:34,132 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:34:34,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [201299143] [2023-11-19 07:34:34,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:34,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:34,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:34,134 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:34,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:34:34,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:34,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 81 conjunts are in the unsatisfiable core [2023-11-19 07:34:34,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:34,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-19 07:34:35,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2023-11-19 07:34:36,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2023-11-19 07:34:36,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2023-11-19 07:34:36,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2023-11-19 07:34:37,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2023-11-19 07:34:38,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2023-11-19 07:34:38,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2023-11-19 07:34:39,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:39,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:39,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:39,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 38 [2023-11-19 07:34:39,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:39,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:39,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:39,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:39,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:39,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:39,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:39,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 53 [2023-11-19 07:34:39,576 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 9 proven. 107 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-11-19 07:34:39,577 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:34:40,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:40,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046038547] [2023-11-19 07:34:40,259 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:34:40,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201299143] [2023-11-19 07:34:40,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201299143] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:34:40,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:34:40,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-11-19 07:34:40,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838074419] [2023-11-19 07:34:40,260 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-19 07:34:40,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:34:40,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:40,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:34:40,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2023-11-19 07:34:40,263 INFO L87 Difference]: Start difference. First operand 216 states and 314 transitions. Second operand has 15 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-19 07:34:42,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:34:42,290 INFO L93 Difference]: Finished difference Result 459 states and 673 transitions. [2023-11-19 07:34:42,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-19 07:34:42,298 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) Word has length 108 [2023-11-19 07:34:42,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:34:42,305 INFO L225 Difference]: With dead ends: 459 [2023-11-19 07:34:42,306 INFO L226 Difference]: Without dead ends: 340 [2023-11-19 07:34:42,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=226, Invalid=896, Unknown=0, NotChecked=0, Total=1122 [2023-11-19 07:34:42,308 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 548 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 876 SdHoareTripleChecker+Invalid, 991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:34:42,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [551 Valid, 876 Invalid, 991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 948 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-19 07:34:42,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2023-11-19 07:34:42,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 230. [2023-11-19 07:34:42,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 201 states have (on average 1.427860696517413) internal successors, (287), 201 states have internal predecessors, (287), 24 states have call successors, (24), 4 states have call predecessors, (24), 4 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-19 07:34:42,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 335 transitions. [2023-11-19 07:34:42,342 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 335 transitions. Word has length 108 [2023-11-19 07:34:42,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:34:42,342 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 335 transitions. [2023-11-19 07:34:42,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-19 07:34:42,343 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 335 transitions. [2023-11-19 07:34:42,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-19 07:34:42,345 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:34:42,345 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:34:42,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-19 07:34:42,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 07:34:42,558 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:34:42,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:42,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1125019785, now seen corresponding path program 1 times [2023-11-19 07:34:42,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:42,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390408225] [2023-11-19 07:34:42,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:42,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:42,596 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:34:42,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1799420893] [2023-11-19 07:34:42,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:42,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:42,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:42,598 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:42,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:34:42,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:42,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-19 07:34:42,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:43,243 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-11-19 07:34:43,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-11-19 07:34:43,305 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-11-19 07:34:43,306 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:34:43,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:43,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390408225] [2023-11-19 07:34:43,306 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:34:43,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799420893] [2023-11-19 07:34:43,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799420893] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:34:43,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:34:43,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:34:43,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441815681] [2023-11-19 07:34:43,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:34:43,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:34:43,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:43,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:34:43,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:34:43,312 INFO L87 Difference]: Start difference. First operand 230 states and 335 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-19 07:34:43,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:34:43,604 INFO L93 Difference]: Finished difference Result 464 states and 678 transitions. [2023-11-19 07:34:43,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:34:43,604 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 109 [2023-11-19 07:34:43,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:34:43,607 INFO L225 Difference]: With dead ends: 464 [2023-11-19 07:34:43,607 INFO L226 Difference]: Without dead ends: 237 [2023-11-19 07:34:43,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:34:43,609 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 109 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:34:43,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 191 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:34:43,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2023-11-19 07:34:43,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 235. [2023-11-19 07:34:43,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 206 states have (on average 1.4174757281553398) internal successors, (292), 206 states have internal predecessors, (292), 24 states have call successors, (24), 4 states have call predecessors, (24), 4 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-19 07:34:43,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 340 transitions. [2023-11-19 07:34:43,641 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 340 transitions. Word has length 109 [2023-11-19 07:34:43,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:34:43,642 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 340 transitions. [2023-11-19 07:34:43,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-19 07:34:43,642 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 340 transitions. [2023-11-19 07:34:43,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-19 07:34:43,644 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:34:43,644 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:34:43,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:34:43,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 07:34:43,863 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:34:43,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:43,864 INFO L85 PathProgramCache]: Analyzing trace with hash -869124921, now seen corresponding path program 1 times [2023-11-19 07:34:43,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:43,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034014474] [2023-11-19 07:34:43,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:43,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:43,902 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:34:43,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2091571949] [2023-11-19 07:34:43,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:43,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:43,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:43,908 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:43,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:34:44,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:44,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-19 07:34:44,127 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:44,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-19 07:34:44,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-19 07:34:44,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-19 07:34:44,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-19 07:34:45,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-19 07:34:45,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-19 07:34:45,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-19 07:34:46,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:46,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:46,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 25 [2023-11-19 07:34:46,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:46,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:46,129 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:34:46,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 15 [2023-11-19 07:34:46,145 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2023-11-19 07:34:46,146 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:34:46,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:46,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034014474] [2023-11-19 07:34:46,544 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:34:46,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091571949] [2023-11-19 07:34:46,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091571949] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:34:46,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:34:46,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-11-19 07:34:46,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955129205] [2023-11-19 07:34:46,545 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-19 07:34:46,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:34:46,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:46,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:34:46,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:34:46,547 INFO L87 Difference]: Start difference. First operand 235 states and 340 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-19 07:34:47,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:34:47,372 INFO L93 Difference]: Finished difference Result 525 states and 760 transitions. [2023-11-19 07:34:47,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:34:47,373 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 109 [2023-11-19 07:34:47,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:34:47,378 INFO L225 Difference]: With dead ends: 525 [2023-11-19 07:34:47,381 INFO L226 Difference]: Without dead ends: 293 [2023-11-19 07:34:47,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2023-11-19 07:34:47,383 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 244 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 808 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 07:34:47,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 808 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 07:34:47,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2023-11-19 07:34:47,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 239. [2023-11-19 07:34:47,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 210 states have (on average 1.4142857142857144) internal successors, (297), 210 states have internal predecessors, (297), 24 states have call successors, (24), 4 states have call predecessors, (24), 4 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-19 07:34:47,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 345 transitions. [2023-11-19 07:34:47,424 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 345 transitions. Word has length 109 [2023-11-19 07:34:47,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:34:47,424 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 345 transitions. [2023-11-19 07:34:47,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-19 07:34:47,425 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 345 transitions. [2023-11-19 07:34:47,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-19 07:34:47,426 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:34:47,427 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:34:47,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:34:47,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 07:34:47,648 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:34:47,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:47,648 INFO L85 PathProgramCache]: Analyzing trace with hash -992015304, now seen corresponding path program 1 times [2023-11-19 07:34:47,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:47,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850513269] [2023-11-19 07:34:47,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:47,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:47,684 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:34:47,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [227455559] [2023-11-19 07:34:47,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:47,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:47,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:47,685 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:47,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:34:47,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:47,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 76 conjunts are in the unsatisfiable core [2023-11-19 07:34:47,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:48,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-19 07:34:48,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-19 07:34:48,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-19 07:34:48,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-19 07:34:49,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-19 07:34:49,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-19 07:34:49,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-19 07:34:50,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2023-11-19 07:34:50,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:50,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:50,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:50,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 32 [2023-11-19 07:34:50,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:50,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:50,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:50,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 26 [2023-11-19 07:34:50,827 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2023-11-19 07:34:50,827 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:34:51,200 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-11-19 07:34:51,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:51,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850513269] [2023-11-19 07:34:51,200 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:34:51,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227455559] [2023-11-19 07:34:51,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227455559] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:34:51,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:34:51,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13] total 22 [2023-11-19 07:34:51,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573112611] [2023-11-19 07:34:51,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:34:51,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 07:34:51,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:51,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 07:34:51,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2023-11-19 07:34:51,203 INFO L87 Difference]: Start difference. First operand 239 states and 345 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-19 07:34:52,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:34:52,095 INFO L93 Difference]: Finished difference Result 711 states and 1043 transitions. [2023-11-19 07:34:52,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 07:34:52,098 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 109 [2023-11-19 07:34:52,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:34:52,102 INFO L225 Difference]: With dead ends: 711 [2023-11-19 07:34:52,102 INFO L226 Difference]: Without dead ends: 475 [2023-11-19 07:34:52,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2023-11-19 07:34:52,104 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 411 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 1104 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 07:34:52,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 1104 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 07:34:52,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2023-11-19 07:34:52,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 257. [2023-11-19 07:34:52,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 228 states have (on average 1.4166666666666667) internal successors, (323), 228 states have internal predecessors, (323), 24 states have call successors, (24), 4 states have call predecessors, (24), 4 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-19 07:34:52,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 371 transitions. [2023-11-19 07:34:52,137 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 371 transitions. Word has length 109 [2023-11-19 07:34:52,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:34:52,138 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 371 transitions. [2023-11-19 07:34:52,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-19 07:34:52,138 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 371 transitions. [2023-11-19 07:34:52,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-19 07:34:52,140 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:34:52,140 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:34:52,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:34:52,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:52,350 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:34:52,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:52,350 INFO L85 PathProgramCache]: Analyzing trace with hash -2038012556, now seen corresponding path program 1 times [2023-11-19 07:34:52,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:52,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645956673] [2023-11-19 07:34:52,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:52,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:52,412 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:34:52,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [343471208] [2023-11-19 07:34:52,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:52,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:52,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:52,414 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:52,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:34:52,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:52,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-19 07:34:52,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:52,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-19 07:34:53,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-19 07:34:53,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-19 07:34:53,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-19 07:34:53,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-19 07:34:54,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-19 07:34:54,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-19 07:34:54,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:54,588 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-19 07:34:54,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 25 [2023-11-19 07:34:54,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:54,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:54,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:54,802 INFO L349 Elim1Store]: treesize reduction 45, result has 25.0 percent of original size [2023-11-19 07:34:54,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2023-11-19 07:34:54,834 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2023-11-19 07:34:54,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:34:55,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:55,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645956673] [2023-11-19 07:34:55,247 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:34:55,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343471208] [2023-11-19 07:34:55,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343471208] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:34:55,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:34:55,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-11-19 07:34:55,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287316805] [2023-11-19 07:34:55,249 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-19 07:34:55,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:34:55,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:55,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:34:55,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:34:55,250 INFO L87 Difference]: Start difference. First operand 257 states and 371 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-19 07:34:55,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:34:55,868 INFO L93 Difference]: Finished difference Result 626 states and 908 transitions. [2023-11-19 07:34:55,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:34:55,869 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 110 [2023-11-19 07:34:55,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:34:55,873 INFO L225 Difference]: With dead ends: 626 [2023-11-19 07:34:55,873 INFO L226 Difference]: Without dead ends: 365 [2023-11-19 07:34:55,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:34:55,880 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 145 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:34:55,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 635 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 07:34:55,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2023-11-19 07:34:55,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 348. [2023-11-19 07:34:55,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 305 states have (on average 1.4032786885245903) internal successors, (428), 305 states have internal predecessors, (428), 36 states have call successors, (36), 6 states have call predecessors, (36), 6 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2023-11-19 07:34:55,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 500 transitions. [2023-11-19 07:34:55,936 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 500 transitions. Word has length 110 [2023-11-19 07:34:55,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:34:55,937 INFO L495 AbstractCegarLoop]: Abstraction has 348 states and 500 transitions. [2023-11-19 07:34:55,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-19 07:34:55,937 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 500 transitions. [2023-11-19 07:34:55,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-19 07:34:55,940 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:34:55,940 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:34:55,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 07:34:56,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 07:34:56,162 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:34:56,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:56,162 INFO L85 PathProgramCache]: Analyzing trace with hash -495580548, now seen corresponding path program 1 times [2023-11-19 07:34:56,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:56,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362867890] [2023-11-19 07:34:56,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:56,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:56,219 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:34:56,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1195194961] [2023-11-19 07:34:56,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:56,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:56,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:56,223 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:56,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 07:34:56,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:56,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-19 07:34:56,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:56,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-19 07:34:57,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-19 07:34:57,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-19 07:34:57,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-19 07:34:58,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-19 07:34:58,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-19 07:34:58,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-19 07:34:59,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 25 [2023-11-19 07:34:59,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:59,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:59,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:59,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 40 [2023-11-19 07:34:59,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:59,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:59,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:59,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 18 [2023-11-19 07:34:59,510 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 9 proven. 107 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-11-19 07:34:59,511 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:34:59,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:59,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362867890] [2023-11-19 07:34:59,984 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:34:59,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195194961] [2023-11-19 07:34:59,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195194961] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:34:59,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:34:59,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-11-19 07:34:59,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946450100] [2023-11-19 07:34:59,985 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-19 07:34:59,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 07:34:59,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:59,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 07:34:59,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-11-19 07:34:59,990 INFO L87 Difference]: Start difference. First operand 348 states and 500 transitions. Second operand has 13 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-19 07:35:01,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:35:01,698 INFO L93 Difference]: Finished difference Result 736 states and 1063 transitions. [2023-11-19 07:35:01,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-19 07:35:01,699 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) Word has length 110 [2023-11-19 07:35:01,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:35:01,703 INFO L225 Difference]: With dead ends: 736 [2023-11-19 07:35:01,703 INFO L226 Difference]: Without dead ends: 589 [2023-11-19 07:35:01,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=234, Invalid=822, Unknown=0, NotChecked=0, Total=1056 [2023-11-19 07:35:01,706 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 661 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 966 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 664 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:35:01,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [664 Valid, 921 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 966 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-19 07:35:01,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2023-11-19 07:35:01,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 355. [2023-11-19 07:35:01,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 312 states have (on average 1.4006410256410255) internal successors, (437), 312 states have internal predecessors, (437), 36 states have call successors, (36), 6 states have call predecessors, (36), 6 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2023-11-19 07:35:01,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 509 transitions. [2023-11-19 07:35:01,754 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 509 transitions. Word has length 110 [2023-11-19 07:35:01,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:35:01,755 INFO L495 AbstractCegarLoop]: Abstraction has 355 states and 509 transitions. [2023-11-19 07:35:01,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-19 07:35:01,755 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 509 transitions. [2023-11-19 07:35:01,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-19 07:35:01,757 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:35:01,757 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:35:01,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:01,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:01,965 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:35:01,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:01,965 INFO L85 PathProgramCache]: Analyzing trace with hash 712229679, now seen corresponding path program 1 times [2023-11-19 07:35:01,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:01,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257445705] [2023-11-19 07:35:01,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:01,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:02,001 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:35:02,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [370025289] [2023-11-19 07:35:02,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:02,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:02,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:02,003 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:02,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 07:35:02,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:02,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-19 07:35:02,230 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:03,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-19 07:35:03,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-19 07:35:03,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-19 07:35:03,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:35:03,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2023-11-19 07:35:03,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:35:03,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:35:03,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:35:03,838 INFO L349 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2023-11-19 07:35:03,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 32 [2023-11-19 07:35:04,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:35:04,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:35:04,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:35:04,063 INFO L349 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2023-11-19 07:35:04,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 39 [2023-11-19 07:35:04,084 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2023-11-19 07:35:04,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:04,172 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-11-19 07:35:04,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:04,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257445705] [2023-11-19 07:35:04,172 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:35:04,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370025289] [2023-11-19 07:35:04,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370025289] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:04,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:35:04,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-11-19 07:35:04,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28464368] [2023-11-19 07:35:04,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:35:04,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:35:04,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:04,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:35:04,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:35:04,175 INFO L87 Difference]: Start difference. First operand 355 states and 509 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-19 07:35:04,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:35:04,401 INFO L93 Difference]: Finished difference Result 565 states and 813 transitions. [2023-11-19 07:35:04,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:35:04,402 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 110 [2023-11-19 07:35:04,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:35:04,404 INFO L225 Difference]: With dead ends: 565 [2023-11-19 07:35:04,405 INFO L226 Difference]: Without dead ends: 413 [2023-11-19 07:35:04,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 208 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:35:04,406 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 101 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:35:04,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 481 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:35:04,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2023-11-19 07:35:04,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 356. [2023-11-19 07:35:04,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 313 states have (on average 1.3993610223642172) internal successors, (438), 313 states have internal predecessors, (438), 36 states have call successors, (36), 6 states have call predecessors, (36), 6 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2023-11-19 07:35:04,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 510 transitions. [2023-11-19 07:35:04,450 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 510 transitions. Word has length 110 [2023-11-19 07:35:04,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:35:04,450 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 510 transitions. [2023-11-19 07:35:04,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-19 07:35:04,451 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 510 transitions. [2023-11-19 07:35:04,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-19 07:35:04,452 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:35:04,453 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:35:04,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:04,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-19 07:35:04,678 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:35:04,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:04,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1470958395, now seen corresponding path program 1 times [2023-11-19 07:35:04,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:04,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823325173] [2023-11-19 07:35:04,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:04,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:04,710 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:35:04,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [885434655] [2023-11-19 07:35:04,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:04,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:04,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:04,712 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:04,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-19 07:35:04,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:04,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-19 07:35:04,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:05,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-19 07:35:05,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-19 07:35:05,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-19 07:35:06,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-19 07:35:06,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-19 07:35:06,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-19 07:35:06,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-19 07:35:07,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:35:07,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:35:07,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 25 [2023-11-19 07:35:07,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:35:07,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:35:07,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2023-11-19 07:35:07,468 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2023-11-19 07:35:07,468 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:07,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:07,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823325173] [2023-11-19 07:35:07,926 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:35:07,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885434655] [2023-11-19 07:35:07,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885434655] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:07,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:35:07,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-11-19 07:35:07,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941697551] [2023-11-19 07:35:07,928 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:07,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 07:35:07,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:07,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 07:35:07,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2023-11-19 07:35:07,930 INFO L87 Difference]: Start difference. First operand 356 states and 510 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-19 07:35:08,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:35:08,946 INFO L93 Difference]: Finished difference Result 814 states and 1173 transitions. [2023-11-19 07:35:08,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:35:08,947 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 110 [2023-11-19 07:35:08,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:35:08,952 INFO L225 Difference]: With dead ends: 814 [2023-11-19 07:35:08,952 INFO L226 Difference]: Without dead ends: 661 [2023-11-19 07:35:08,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2023-11-19 07:35:08,955 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 422 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 1103 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 07:35:08,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 1103 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 07:35:08,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2023-11-19 07:35:09,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 598. [2023-11-19 07:35:09,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 527 states have (on average 1.4060721062618595) internal successors, (741), 527 states have internal predecessors, (741), 60 states have call successors, (60), 10 states have call predecessors, (60), 10 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2023-11-19 07:35:09,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 861 transitions. [2023-11-19 07:35:09,029 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 861 transitions. Word has length 110 [2023-11-19 07:35:09,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:35:09,033 INFO L495 AbstractCegarLoop]: Abstraction has 598 states and 861 transitions. [2023-11-19 07:35:09,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-19 07:35:09,033 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 861 transitions. [2023-11-19 07:35:09,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-19 07:35:09,035 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:35:09,035 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:35:09,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:09,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-19 07:35:09,257 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:35:09,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:09,258 INFO L85 PathProgramCache]: Analyzing trace with hash 230495132, now seen corresponding path program 1 times [2023-11-19 07:35:09,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:09,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118922835] [2023-11-19 07:35:09,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:09,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:09,289 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:35:09,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [846173585] [2023-11-19 07:35:09,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:09,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:09,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:09,291 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:09,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c89ea95-a40e-4b91-883f-efb1389e1462/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process