./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--mmc--host--rtsx_pci_sdmmc.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fecdf25c-ddd4-45bf-8cb2-f598a89d96fc/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fecdf25c-ddd4-45bf-8cb2-f598a89d96fc/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fecdf25c-ddd4-45bf-8cb2-f598a89d96fc/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fecdf25c-ddd4-45bf-8cb2-f598a89d96fc/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--mmc--host--rtsx_pci_sdmmc.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fecdf25c-ddd4-45bf-8cb2-f598a89d96fc/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fecdf25c-ddd4-45bf-8cb2-f598a89d96fc/bin/utaipan-verify-NcY6lQBIFX --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 19290a926baf25addf4978704839db0abeadfa27fdfeabe3829a382dc34ef323 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:58:56,750 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:58:56,830 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fecdf25c-ddd4-45bf-8cb2-f598a89d96fc/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-12 00:58:56,837 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:58:56,838 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:58:56,868 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:58:56,869 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:58:56,870 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:58:56,871 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:58:56,872 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:58:56,873 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:58:56,873 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:58:56,874 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:58:56,875 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:58:56,876 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:58:56,876 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:58:56,877 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:58:56,878 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:58:56,879 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:58:56,879 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:58:56,880 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:58:56,881 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:58:56,882 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:58:56,883 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:58:56,884 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:58:56,885 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:58:56,885 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:58:56,886 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:58:56,887 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:58:56,887 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:58:56,888 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:58:56,889 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:58:56,889 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:58:56,890 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:58:56,890 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:58:56,891 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:58:56,891 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:58:56,892 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:58:56,892 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:58:56,892 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:58:56,893 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:58:56,893 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:58:56,894 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_fecdf25c-ddd4-45bf-8cb2-f598a89d96fc/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fecdf25c-ddd4-45bf-8cb2-f598a89d96fc/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 19290a926baf25addf4978704839db0abeadfa27fdfeabe3829a382dc34ef323 [2023-11-12 00:58:57,224 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:58:57,259 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:58:57,263 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:58:57,264 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:58:57,265 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:58:57,267 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fecdf25c-ddd4-45bf-8cb2-f598a89d96fc/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--mmc--host--rtsx_pci_sdmmc.ko-entry_point.cil.out.i [2023-11-12 00:59:00,510 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:59:01,118 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:59:01,120 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fecdf25c-ddd4-45bf-8cb2-f598a89d96fc/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--mmc--host--rtsx_pci_sdmmc.ko-entry_point.cil.out.i [2023-11-12 00:59:01,159 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fecdf25c-ddd4-45bf-8cb2-f598a89d96fc/bin/utaipan-verify-NcY6lQBIFX/data/ce4e75291/643971144d9a48bb9829e4a260ef604e/FLAGc4cc0440c [2023-11-12 00:59:01,175 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fecdf25c-ddd4-45bf-8cb2-f598a89d96fc/bin/utaipan-verify-NcY6lQBIFX/data/ce4e75291/643971144d9a48bb9829e4a260ef604e [2023-11-12 00:59:01,183 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:59:01,186 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:59:01,190 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:59:01,190 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:59:01,198 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:59:01,198 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:59:01" (1/1) ... [2023-11-12 00:59:01,200 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@687cd318 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:01, skipping insertion in model container [2023-11-12 00:59:01,200 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:59:01" (1/1) ... [2023-11-12 00:59:01,345 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:59:02,845 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_fecdf25c-ddd4-45bf-8cb2-f598a89d96fc/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--mmc--host--rtsx_pci_sdmmc.ko-entry_point.cil.out.i[195799,195812] [2023-11-12 00:59:02,912 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:59:02,945 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:59:03,047 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("bswapl %0": "=r" (val): "0" (val)); [3927] [2023-11-12 00:59:03,245 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_fecdf25c-ddd4-45bf-8cb2-f598a89d96fc/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--mmc--host--rtsx_pci_sdmmc.ko-entry_point.cil.out.i[195799,195812] [2023-11-12 00:59:03,256 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:59:03,409 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:59:03,410 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:03 WrapperNode [2023-11-12 00:59:03,410 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:59:03,411 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:59:03,412 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:59:03,412 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:59:03,421 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:03" (1/1) ... [2023-11-12 00:59:03,520 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:03" (1/1) ... [2023-11-12 00:59:03,692 INFO L138 Inliner]: procedures = 188, calls = 1431, calls flagged for inlining = 94, calls inlined = 89, statements flattened = 3834 [2023-11-12 00:59:03,693 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:59:03,693 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:59:03,694 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:59:03,694 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:59:03,709 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:03" (1/1) ... [2023-11-12 00:59:03,709 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:03" (1/1) ... [2023-11-12 00:59:03,759 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:03" (1/1) ... [2023-11-12 00:59:03,769 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:03" (1/1) ... [2023-11-12 00:59:03,888 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:03" (1/1) ... [2023-11-12 00:59:03,916 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:03" (1/1) ... [2023-11-12 00:59:03,949 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:03" (1/1) ... [2023-11-12 00:59:03,970 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:03" (1/1) ... [2023-11-12 00:59:04,007 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:59:04,009 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:59:04,009 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:59:04,010 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:59:04,011 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:03" (1/1) ... [2023-11-12 00:59:04,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:59:04,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fecdf25c-ddd4-45bf-8cb2-f598a89d96fc/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:04,047 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fecdf25c-ddd4-45bf-8cb2-f598a89d96fc/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:59:04,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fecdf25c-ddd4-45bf-8cb2-f598a89d96fc/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:59:04,084 INFO L130 BoogieDeclarations]: Found specification of procedure get_unaligned_be32 [2023-11-12 00:59:04,086 INFO L138 BoogieDeclarations]: Found implementation of procedure get_unaligned_be32 [2023-11-12 00:59:04,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-12 00:59:04,086 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2023-11-12 00:59:04,086 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2023-11-12 00:59:04,086 INFO L130 BoogieDeclarations]: Found specification of procedure sd_pre_dma_transfer [2023-11-12 00:59:04,086 INFO L138 BoogieDeclarations]: Found implementation of procedure sd_pre_dma_transfer [2023-11-12 00:59:04,087 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-12 00:59:04,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-12 00:59:04,088 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:59:04,088 INFO L130 BoogieDeclarations]: Found specification of procedure rtsx_pci_sdmmc_drv_probe [2023-11-12 00:59:04,089 INFO L138 BoogieDeclarations]: Found implementation of procedure rtsx_pci_sdmmc_drv_probe [2023-11-12 00:59:04,089 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-11-12 00:59:04,089 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-11-12 00:59:04,089 INFO L130 BoogieDeclarations]: Found specification of procedure rtsx_pci_start_run [2023-11-12 00:59:04,089 INFO L138 BoogieDeclarations]: Found implementation of procedure rtsx_pci_start_run [2023-11-12 00:59:04,089 INFO L130 BoogieDeclarations]: Found specification of procedure sdio_extblock_cmd [2023-11-12 00:59:04,089 INFO L138 BoogieDeclarations]: Found implementation of procedure sdio_extblock_cmd [2023-11-12 00:59:04,090 INFO L130 BoogieDeclarations]: Found specification of procedure mmc_op_multi [2023-11-12 00:59:04,090 INFO L138 BoogieDeclarations]: Found implementation of procedure mmc_op_multi [2023-11-12 00:59:04,091 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-12 00:59:04,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-12 00:59:04,091 INFO L130 BoogieDeclarations]: Found specification of procedure rtsx_pci_dma_transfer [2023-11-12 00:59:04,091 INFO L138 BoogieDeclarations]: Found implementation of procedure rtsx_pci_dma_transfer [2023-11-12 00:59:04,091 INFO L130 BoogieDeclarations]: Found specification of procedure sd_request [2023-11-12 00:59:04,092 INFO L138 BoogieDeclarations]: Found implementation of procedure sd_request [2023-11-12 00:59:04,092 INFO L130 BoogieDeclarations]: Found specification of procedure activate_work_1 [2023-11-12 00:59:04,093 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_work_1 [2023-11-12 00:59:04,093 INFO L130 BoogieDeclarations]: Found specification of procedure sd_send_cmd_get_rsp [2023-11-12 00:59:04,093 INFO L138 BoogieDeclarations]: Found implementation of procedure sd_send_cmd_get_rsp [2023-11-12 00:59:04,094 INFO L130 BoogieDeclarations]: Found specification of procedure sd_clear_error [2023-11-12 00:59:04,094 INFO L138 BoogieDeclarations]: Found implementation of procedure sd_clear_error [2023-11-12 00:59:04,094 INFO L130 BoogieDeclarations]: Found specification of procedure sdmmc_get_ro [2023-11-12 00:59:04,094 INFO L138 BoogieDeclarations]: Found implementation of procedure sdmmc_get_ro [2023-11-12 00:59:04,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:59:04,095 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-11-12 00:59:04,095 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-11-12 00:59:04,095 INFO L130 BoogieDeclarations]: Found specification of procedure sd_cmd_set_data_len [2023-11-12 00:59:04,095 INFO L138 BoogieDeclarations]: Found implementation of procedure sd_cmd_set_data_len [2023-11-12 00:59:04,095 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-12 00:59:04,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-12 00:59:04,095 INFO L130 BoogieDeclarations]: Found specification of procedure __dynamic_dev_dbg [2023-11-12 00:59:04,095 INFO L138 BoogieDeclarations]: Found implementation of procedure __dynamic_dev_dbg [2023-11-12 00:59:04,096 INFO L130 BoogieDeclarations]: Found specification of procedure mmc_free_host [2023-11-12 00:59:04,096 INFO L138 BoogieDeclarations]: Found implementation of procedure mmc_free_host [2023-11-12 00:59:04,096 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-12 00:59:04,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-12 00:59:04,096 INFO L130 BoogieDeclarations]: Found specification of procedure rtsx_pci_switch_clock [2023-11-12 00:59:04,096 INFO L138 BoogieDeclarations]: Found implementation of procedure rtsx_pci_switch_clock [2023-11-12 00:59:04,096 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2023-11-12 00:59:04,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2023-11-12 00:59:04,097 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 00:59:04,097 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 00:59:04,097 INFO L130 BoogieDeclarations]: Found specification of procedure ioread32 [2023-11-12 00:59:04,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ioread32 [2023-11-12 00:59:04,097 INFO L130 BoogieDeclarations]: Found specification of procedure sdmmc_get_cd [2023-11-12 00:59:04,097 INFO L138 BoogieDeclarations]: Found implementation of procedure sdmmc_get_cd [2023-11-12 00:59:04,097 INFO L130 BoogieDeclarations]: Found specification of procedure sd_response_type [2023-11-12 00:59:04,097 INFO L138 BoogieDeclarations]: Found implementation of procedure sd_response_type [2023-11-12 00:59:04,098 INFO L130 BoogieDeclarations]: Found specification of procedure sdmmc_dev [2023-11-12 00:59:04,098 INFO L138 BoogieDeclarations]: Found implementation of procedure sdmmc_dev [2023-11-12 00:59:04,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 00:59:04,099 INFO L130 BoogieDeclarations]: Found specification of procedure sd_cmd_set_sd_cmd [2023-11-12 00:59:04,099 INFO L138 BoogieDeclarations]: Found implementation of procedure sd_cmd_set_sd_cmd [2023-11-12 00:59:04,100 INFO L130 BoogieDeclarations]: Found specification of procedure rtsx_pci_card_exclusive_check [2023-11-12 00:59:04,100 INFO L138 BoogieDeclarations]: Found implementation of procedure rtsx_pci_card_exclusive_check [2023-11-12 00:59:04,100 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2023-11-12 00:59:04,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2023-11-12 00:59:04,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:59:04,101 INFO L130 BoogieDeclarations]: Found specification of procedure sd_rw_cmd [2023-11-12 00:59:04,101 INFO L138 BoogieDeclarations]: Found implementation of procedure sd_rw_cmd [2023-11-12 00:59:04,101 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2023-11-12 00:59:04,101 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2023-11-12 00:59:04,102 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:59:04,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 00:59:04,102 INFO L130 BoogieDeclarations]: Found specification of procedure sdmmc_post_req [2023-11-12 00:59:04,103 INFO L138 BoogieDeclarations]: Found implementation of procedure sdmmc_post_req [2023-11-12 00:59:04,103 INFO L130 BoogieDeclarations]: Found specification of procedure rtsx_pci_send_cmd_no_wait [2023-11-12 00:59:04,103 INFO L138 BoogieDeclarations]: Found implementation of procedure rtsx_pci_send_cmd_no_wait [2023-11-12 00:59:04,103 INFO L130 BoogieDeclarations]: Found specification of procedure rtsx_pci_send_cmd [2023-11-12 00:59:04,103 INFO L138 BoogieDeclarations]: Found implementation of procedure rtsx_pci_send_cmd [2023-11-12 00:59:04,103 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 00:59:04,103 INFO L130 BoogieDeclarations]: Found specification of procedure call_and_disable_work_1 [2023-11-12 00:59:04,103 INFO L138 BoogieDeclarations]: Found implementation of procedure call_and_disable_work_1 [2023-11-12 00:59:04,104 INFO L130 BoogieDeclarations]: Found specification of procedure sd_read_data [2023-11-12 00:59:04,104 INFO L138 BoogieDeclarations]: Found implementation of procedure sd_read_data [2023-11-12 00:59:04,104 INFO L130 BoogieDeclarations]: Found specification of procedure mmc_request_done [2023-11-12 00:59:04,105 INFO L138 BoogieDeclarations]: Found implementation of procedure mmc_request_done [2023-11-12 00:59:04,105 INFO L130 BoogieDeclarations]: Found specification of procedure call_and_disable_all_1 [2023-11-12 00:59:04,105 INFO L138 BoogieDeclarations]: Found implementation of procedure call_and_disable_all_1 [2023-11-12 00:59:04,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:59:04,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-12 00:59:04,105 INFO L130 BoogieDeclarations]: Found specification of procedure platform_get_drvdata [2023-11-12 00:59:04,105 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_get_drvdata [2023-11-12 00:59:04,105 INFO L130 BoogieDeclarations]: Found specification of procedure rtsx_pci_write_register [2023-11-12 00:59:04,106 INFO L138 BoogieDeclarations]: Found implementation of procedure rtsx_pci_write_register [2023-11-12 00:59:04,106 INFO L130 BoogieDeclarations]: Found specification of procedure dev_err [2023-11-12 00:59:04,106 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_err [2023-11-12 00:59:04,106 INFO L130 BoogieDeclarations]: Found specification of procedure sd_change_phase [2023-11-12 00:59:04,106 INFO L138 BoogieDeclarations]: Found implementation of procedure sd_change_phase [2023-11-12 00:59:04,106 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work_on [2023-11-12 00:59:04,106 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work_on [2023-11-12 00:59:04,106 INFO L130 BoogieDeclarations]: Found specification of procedure mmc_card_uhs [2023-11-12 00:59:04,107 INFO L138 BoogieDeclarations]: Found implementation of procedure mmc_card_uhs [2023-11-12 00:59:04,108 INFO L130 BoogieDeclarations]: Found specification of procedure rtsx_pci_sdmmc_drv_remove [2023-11-12 00:59:04,108 INFO L138 BoogieDeclarations]: Found implementation of procedure rtsx_pci_sdmmc_drv_remove [2023-11-12 00:59:04,108 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2023-11-12 00:59:04,108 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2023-11-12 00:59:04,108 INFO L130 BoogieDeclarations]: Found specification of procedure rtsx_pci_add_cmd [2023-11-12 00:59:04,109 INFO L138 BoogieDeclarations]: Found implementation of procedure rtsx_pci_add_cmd [2023-11-12 00:59:04,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:59:04,109 INFO L130 BoogieDeclarations]: Found specification of procedure mmc_priv [2023-11-12 00:59:04,109 INFO L138 BoogieDeclarations]: Found implementation of procedure mmc_priv [2023-11-12 00:59:04,109 INFO L130 BoogieDeclarations]: Found specification of procedure flush_workqueue [2023-11-12 00:59:04,110 INFO L138 BoogieDeclarations]: Found implementation of procedure flush_workqueue [2023-11-12 00:59:04,110 INFO L130 BoogieDeclarations]: Found specification of procedure rtsx_pci_read_register [2023-11-12 00:59:04,110 INFO L138 BoogieDeclarations]: Found implementation of procedure rtsx_pci_read_register [2023-11-12 00:59:04,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:59:04,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:59:04,848 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:59:04,852 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:59:05,122 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-12 00:59:12,552 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:59:14,074 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:59:14,074 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 00:59:14,081 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:59:14 BoogieIcfgContainer [2023-11-12 00:59:14,082 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:59:14,085 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:59:14,086 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:59:14,089 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:59:14,089 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:59:01" (1/3) ... [2023-11-12 00:59:14,091 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18ca8988 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:59:14, skipping insertion in model container [2023-11-12 00:59:14,092 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:03" (2/3) ... [2023-11-12 00:59:14,093 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18ca8988 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:59:14, skipping insertion in model container [2023-11-12 00:59:14,093 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:59:14" (3/3) ... [2023-11-12 00:59:14,095 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--mmc--host--rtsx_pci_sdmmc.ko-entry_point.cil.out.i [2023-11-12 00:59:14,118 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:59:14,118 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:59:14,223 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:59:14,231 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=FINITE_AUTOMATA, 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;@538d5259, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:59:14,231 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:59:14,243 INFO L276 IsEmpty]: Start isEmpty. Operand has 922 states, 539 states have (on average 1.3599257884972171) internal successors, (733), 576 states have internal predecessors, (733), 330 states have call successors, (330), 53 states have call predecessors, (330), 52 states have return successors, (325), 319 states have call predecessors, (325), 325 states have call successors, (325) [2023-11-12 00:59:14,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-11-12 00:59:14,298 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:14,299 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:14,300 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:14,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:14,310 INFO L85 PathProgramCache]: Analyzing trace with hash 761562562, now seen corresponding path program 1 times [2023-11-12 00:59:14,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:14,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36819286] [2023-11-12 00:59:14,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:14,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:14,988 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:59:14,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [335196282] [2023-11-12 00:59:14,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:14,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:15,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fecdf25c-ddd4-45bf-8cb2-f598a89d96fc/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:15,005 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fecdf25c-ddd4-45bf-8cb2-f598a89d96fc/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:59:15,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fecdf25c-ddd4-45bf-8cb2-f598a89d96fc/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:59:16,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:16,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 1731 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:59:16,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:59:16,173 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-12 00:59:16,174 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:59:16,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:16,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36819286] [2023-11-12 00:59:16,175 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:59:16,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335196282] [2023-11-12 00:59:16,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335196282] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:16,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:16,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:59:16,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617820577] [2023-11-12 00:59:16,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:16,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:59:16,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:16,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:59:16,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:59:16,226 INFO L87 Difference]: Start difference. First operand has 922 states, 539 states have (on average 1.3599257884972171) internal successors, (733), 576 states have internal predecessors, (733), 330 states have call successors, (330), 53 states have call predecessors, (330), 52 states have return successors, (325), 319 states have call predecessors, (325), 325 states have call successors, (325) Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-12 00:59:18,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 00:59:22,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 00:59:25,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 00:59:27,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 00:59:28,573 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 00:59:28,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:28,880 INFO L93 Difference]: Finished difference Result 2732 states and 4151 transitions. [2023-11-12 00:59:28,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:59:28,883 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 80 [2023-11-12 00:59:28,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:28,915 INFO L225 Difference]: With dead ends: 2732 [2023-11-12 00:59:28,915 INFO L226 Difference]: Without dead ends: 1804 [2023-11-12 00:59:28,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:59:28,932 INFO L413 NwaCegarLoop]: 1255 mSDtfsCounter, 1360 mSDsluCounter, 1241 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 5 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1360 SdHoareTripleChecker+Valid, 2496 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:28,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1360 Valid, 2496 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 246 Invalid, 4 Unknown, 0 Unchecked, 12.4s Time] [2023-11-12 00:59:28,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1804 states. [2023-11-12 00:59:29,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1804 to 1792. [2023-11-12 00:59:29,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1792 states, 1052 states have (on average 1.346958174904943) internal successors, (1417), 1112 states have internal predecessors, (1417), 640 states have call successors, (640), 100 states have call predecessors, (640), 99 states have return successors, (639), 625 states have call predecessors, (639), 639 states have call successors, (639) [2023-11-12 00:59:29,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 2696 transitions. [2023-11-12 00:59:29,177 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 2696 transitions. Word has length 80 [2023-11-12 00:59:29,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:29,178 INFO L495 AbstractCegarLoop]: Abstraction has 1792 states and 2696 transitions. [2023-11-12 00:59:29,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-12 00:59:29,179 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 2696 transitions. [2023-11-12 00:59:29,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-12 00:59:29,189 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:29,190 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:29,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fecdf25c-ddd4-45bf-8cb2-f598a89d96fc/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:59:29,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fecdf25c-ddd4-45bf-8cb2-f598a89d96fc/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 00:59:29,399 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:29,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:29,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1982581909, now seen corresponding path program 1 times [2023-11-12 00:59:29,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:29,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513202710] [2023-11-12 00:59:29,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:29,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:29,727 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:59:29,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2118343569] [2023-11-12 00:59:29,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:29,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:29,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fecdf25c-ddd4-45bf-8cb2-f598a89d96fc/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:29,735 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fecdf25c-ddd4-45bf-8cb2-f598a89d96fc/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:59:29,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fecdf25c-ddd4-45bf-8cb2-f598a89d96fc/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:59:30,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:30,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 1735 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:59:30,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:59:30,678 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-12 00:59:30,678 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:59:30,679 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:30,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513202710] [2023-11-12 00:59:30,679 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:59:30,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118343569] [2023-11-12 00:59:30,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118343569] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:30,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:30,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:59:30,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557923426] [2023-11-12 00:59:30,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:30,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:59:30,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:30,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:59:30,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:59:30,684 INFO L87 Difference]: Start difference. First operand 1792 states and 2696 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-12 00:59:31,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 00:59:35,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 00:59:38,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 00:59:40,437 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 00:59:41,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:41,421 INFO L93 Difference]: Finished difference Result 3582 states and 5393 transitions. [2023-11-12 00:59:41,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:59:41,422 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 82 [2023-11-12 00:59:41,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:41,440 INFO L225 Difference]: With dead ends: 3582 [2023-11-12 00:59:41,440 INFO L226 Difference]: Without dead ends: 1800 [2023-11-12 00:59:41,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:59:41,454 INFO L413 NwaCegarLoop]: 1243 mSDtfsCounter, 1336 mSDsluCounter, 1229 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1336 SdHoareTripleChecker+Valid, 2472 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:41,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1336 Valid, 2472 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 243 Invalid, 3 Unknown, 0 Unchecked, 10.6s Time] [2023-11-12 00:59:41,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1800 states. [2023-11-12 00:59:41,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1800 to 1788. [2023-11-12 00:59:41,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1788 states, 1050 states have (on average 1.3457142857142856) internal successors, (1413), 1110 states have internal predecessors, (1413), 638 states have call successors, (638), 100 states have call predecessors, (638), 99 states have return successors, (637), 623 states have call predecessors, (637), 637 states have call successors, (637) [2023-11-12 00:59:41,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1788 states to 1788 states and 2688 transitions. [2023-11-12 00:59:41,591 INFO L78 Accepts]: Start accepts. Automaton has 1788 states and 2688 transitions. Word has length 82 [2023-11-12 00:59:41,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:41,591 INFO L495 AbstractCegarLoop]: Abstraction has 1788 states and 2688 transitions. [2023-11-12 00:59:41,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-12 00:59:41,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1788 states and 2688 transitions. [2023-11-12 00:59:41,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-11-12 00:59:41,597 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:41,598 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:41,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fecdf25c-ddd4-45bf-8cb2-f598a89d96fc/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:59:41,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fecdf25c-ddd4-45bf-8cb2-f598a89d96fc/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-12 00:59:41,808 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:41,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:41,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1581599909, now seen corresponding path program 1 times [2023-11-12 00:59:41,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:41,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923628964] [2023-11-12 00:59:41,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:41,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:42,016 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:59:42,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [542605646] [2023-11-12 00:59:42,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:42,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:42,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fecdf25c-ddd4-45bf-8cb2-f598a89d96fc/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:42,018 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fecdf25c-ddd4-45bf-8cb2-f598a89d96fc/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:59:42,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fecdf25c-ddd4-45bf-8cb2-f598a89d96fc/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:59:43,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:43,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 1733 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:59:43,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:59:43,049 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-12 00:59:43,049 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:59:43,049 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:43,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923628964] [2023-11-12 00:59:43,050 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:59:43,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542605646] [2023-11-12 00:59:43,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542605646] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:43,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:43,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:59:43,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587295555] [2023-11-12 00:59:43,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:43,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:59:43,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:43,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:59:43,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:59:43,053 INFO L87 Difference]: Start difference. First operand 1788 states and 2688 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-12 00:59:44,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 00:59:46,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 00:59:48,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 00:59:51,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 00:59:53,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []