./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--misc--pch_phub.ko-main.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 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_59d97a87-eaf6-4349-8cd7-18b348ff8674/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59d97a87-eaf6-4349-8cd7-18b348ff8674/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59d97a87-eaf6-4349-8cd7-18b348ff8674/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59d97a87-eaf6-4349-8cd7-18b348ff8674/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--misc--pch_phub.ko-main.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59d97a87-eaf6-4349-8cd7-18b348ff8674/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59d97a87-eaf6-4349-8cd7-18b348ff8674/bin/utaipan-verify-mE87zJ7Ire --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 a5b351dc48b78577594847e2589a2433da4c3422ed74f69290b3f52d3ba2c2d2 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:26:53,836 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:26:53,990 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59d97a87-eaf6-4349-8cd7-18b348ff8674/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 21:26:53,999 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:26:54,000 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:26:54,052 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:26:54,053 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:26:54,054 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:26:54,055 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:26:54,062 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:26:54,063 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:26:54,064 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:26:54,065 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:26:54,066 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:26:54,066 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:26:54,067 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:26:54,067 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:26:54,068 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:26:54,068 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:26:54,069 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:26:54,069 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:26:54,074 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:26:54,076 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:26:54,076 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:26:54,077 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:26:54,078 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:26:54,079 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:26:54,079 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:26:54,080 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:26:54,081 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:26:54,083 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:26:54,083 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:26:54,084 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:26:54,084 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:26:54,084 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:26:54,085 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:26:54,085 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:26:54,086 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:26:54,086 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:26:54,086 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:26:54,087 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:26:54,087 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:26:54,088 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:26:54,088 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:26:54,089 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_59d97a87-eaf6-4349-8cd7-18b348ff8674/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59d97a87-eaf6-4349-8cd7-18b348ff8674/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a5b351dc48b78577594847e2589a2433da4c3422ed74f69290b3f52d3ba2c2d2 [2023-11-23 21:26:54,510 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:26:54,547 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:26:54,550 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:26:54,552 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:26:54,552 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:26:54,554 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59d97a87-eaf6-4349-8cd7-18b348ff8674/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--misc--pch_phub.ko-main.cil.out.i [2023-11-23 21:26:57,998 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:26:58,487 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:26:58,488 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59d97a87-eaf6-4349-8cd7-18b348ff8674/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--misc--pch_phub.ko-main.cil.out.i [2023-11-23 21:26:58,525 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59d97a87-eaf6-4349-8cd7-18b348ff8674/bin/utaipan-verify-mE87zJ7Ire/data/08400ddd1/a5db2a7e468041a6ac414e81aff6c850/FLAGd809d2e32 [2023-11-23 21:26:58,540 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59d97a87-eaf6-4349-8cd7-18b348ff8674/bin/utaipan-verify-mE87zJ7Ire/data/08400ddd1/a5db2a7e468041a6ac414e81aff6c850 [2023-11-23 21:26:58,543 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:26:58,545 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:26:58,546 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:26:58,547 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:26:58,552 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:26:58,553 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:26:58" (1/1) ... [2023-11-23 21:26:58,554 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34d68f01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:26:58, skipping insertion in model container [2023-11-23 21:26:58,555 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:26:58" (1/1) ... [2023-11-23 21:26:58,645 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:26:59,794 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_59d97a87-eaf6-4349-8cd7-18b348ff8674/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--misc--pch_phub.ko-main.cil.out.i[106459,106472] [2023-11-23 21:26:59,866 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:26:59,893 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:27:00,044 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_59d97a87-eaf6-4349-8cd7-18b348ff8674/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--misc--pch_phub.ko-main.cil.out.i[106459,106472] [2023-11-23 21:27:00,055 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:27:00,122 WARN L675 CHandler]: The function strstr is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:27:00,122 WARN L675 CHandler]: The function sprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:27:00,131 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:27:00,131 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:00 WrapperNode [2023-11-23 21:27:00,132 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:27:00,133 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:27:00,133 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:27:00,134 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:27:00,142 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:00" (1/1) ... [2023-11-23 21:27:00,215 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:00" (1/1) ... [2023-11-23 21:27:00,375 INFO L138 Inliner]: procedures = 128, calls = 768, calls flagged for inlining = 53, calls inlined = 47, statements flattened = 2569 [2023-11-23 21:27:00,376 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:27:00,377 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:27:00,377 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:27:00,377 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:27:00,387 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:00" (1/1) ... [2023-11-23 21:27:00,388 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:00" (1/1) ... [2023-11-23 21:27:00,417 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:00" (1/1) ... [2023-11-23 21:27:00,417 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:00" (1/1) ... [2023-11-23 21:27:00,494 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:00" (1/1) ... [2023-11-23 21:27:00,506 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:00" (1/1) ... [2023-11-23 21:27:00,518 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:00" (1/1) ... [2023-11-23 21:27:00,532 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:00" (1/1) ... [2023-11-23 21:27:00,555 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:27:00,570 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:27:00,570 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:27:00,570 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:27:00,571 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:00" (1/1) ... [2023-11-23 21:27:00,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:27:00,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59d97a87-eaf6-4349-8cd7-18b348ff8674/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:27:00,615 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59d97a87-eaf6-4349-8cd7-18b348ff8674/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:27:00,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59d97a87-eaf6-4349-8cd7-18b348ff8674/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:27:00,662 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2023-11-23 21:27:00,662 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2023-11-23 21:27:00,662 INFO L130 BoogieDeclarations]: Found specification of procedure pch_phub_remove [2023-11-23 21:27:00,662 INFO L138 BoogieDeclarations]: Found implementation of procedure pch_phub_remove [2023-11-23 21:27:00,663 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2023-11-23 21:27:00,664 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2023-11-23 21:27:00,665 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:27:00,665 INFO L130 BoogieDeclarations]: Found specification of procedure sysfs_create_bin_file [2023-11-23 21:27:00,665 INFO L138 BoogieDeclarations]: Found implementation of procedure sysfs_create_bin_file [2023-11-23 21:27:00,666 INFO L130 BoogieDeclarations]: Found specification of procedure pch_phub_read_modify_write_reg [2023-11-23 21:27:00,666 INFO L138 BoogieDeclarations]: Found implementation of procedure pch_phub_read_modify_write_reg [2023-11-23 21:27:00,666 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_pch_phub_mutex [2023-11-23 21:27:00,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_pch_phub_mutex [2023-11-23 21:27:00,666 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-23 21:27:00,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-23 21:27:00,667 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-23 21:27:00,667 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-23 21:27:00,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:27:00,668 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-11-23 21:27:00,668 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-11-23 21:27:00,669 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2023-11-23 21:27:00,669 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2023-11-23 21:27:00,669 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-23 21:27:00,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-23 21:27:00,670 INFO L130 BoogieDeclarations]: Found specification of procedure __dynamic_dev_dbg [2023-11-23 21:27:00,670 INFO L138 BoogieDeclarations]: Found implementation of procedure __dynamic_dev_dbg [2023-11-23 21:27:00,670 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-23 21:27:00,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-23 21:27:00,671 INFO L130 BoogieDeclarations]: Found specification of procedure ioread32 [2023-11-23 21:27:00,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ioread32 [2023-11-23 21:27:00,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:27:00,672 INFO L130 BoogieDeclarations]: Found specification of procedure sysfs_remove_file [2023-11-23 21:27:00,672 INFO L138 BoogieDeclarations]: Found implementation of procedure sysfs_remove_file [2023-11-23 21:27:00,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:27:00,673 INFO L130 BoogieDeclarations]: Found specification of procedure pci_enable_device [2023-11-23 21:27:00,673 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_enable_device [2023-11-23 21:27:00,673 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_rom [2023-11-23 21:27:00,674 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_rom [2023-11-23 21:27:00,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 21:27:00,674 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:27:00,674 INFO L130 BoogieDeclarations]: Found specification of procedure sprintf [2023-11-23 21:27:00,674 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 21:27:00,674 INFO L130 BoogieDeclarations]: Found specification of procedure pci_get_drvdata [2023-11-23 21:27:00,674 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_get_drvdata [2023-11-23 21:27:00,675 INFO L130 BoogieDeclarations]: Found specification of procedure iowrite32 [2023-11-23 21:27:00,675 INFO L138 BoogieDeclarations]: Found implementation of procedure iowrite32 [2023-11-23 21:27:00,675 INFO L130 BoogieDeclarations]: Found specification of procedure ioread8 [2023-11-23 21:27:00,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ioread8 [2023-11-23 21:27:00,675 INFO L130 BoogieDeclarations]: Found specification of procedure pci_enable_wake [2023-11-23 21:27:00,675 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_enable_wake [2023-11-23 21:27:00,676 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_interruptible [2023-11-23 21:27:00,676 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_interruptible [2023-11-23 21:27:00,676 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2023-11-23 21:27:00,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:27:00,676 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_interruptible_pch_phub_mutex [2023-11-23 21:27:00,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_interruptible_pch_phub_mutex [2023-11-23 21:27:00,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 21:27:00,677 INFO L130 BoogieDeclarations]: Found specification of procedure pci_iounmap [2023-11-23 21:27:00,677 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_iounmap [2023-11-23 21:27:00,678 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_power_state [2023-11-23 21:27:00,678 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_power_state [2023-11-23 21:27:00,679 INFO L130 BoogieDeclarations]: Found specification of procedure dev_err [2023-11-23 21:27:00,679 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_err [2023-11-23 21:27:00,680 INFO L130 BoogieDeclarations]: Found specification of procedure pch_phub_write_serial_rom [2023-11-23 21:27:00,680 INFO L138 BoogieDeclarations]: Found implementation of procedure pch_phub_write_serial_rom [2023-11-23 21:27:00,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:27:00,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:27:00,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:27:00,680 INFO L130 BoogieDeclarations]: Found specification of procedure sysfs_create_file [2023-11-23 21:27:00,680 INFO L138 BoogieDeclarations]: Found implementation of procedure sysfs_create_file [2023-11-23 21:27:00,681 INFO L130 BoogieDeclarations]: Found specification of procedure pch_phub_read_serial_rom [2023-11-23 21:27:00,681 INFO L138 BoogieDeclarations]: Found implementation of procedure pch_phub_read_serial_rom [2023-11-23 21:27:00,681 INFO L130 BoogieDeclarations]: Found specification of procedure pci_map_rom [2023-11-23 21:27:00,681 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_map_rom [2023-11-23 21:27:01,102 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:27:01,108 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:27:03,312 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:27:04,296 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:27:04,297 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-23 21:27:04,299 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:27:04 BoogieIcfgContainer [2023-11-23 21:27:04,299 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:27:04,302 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:27:04,303 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:27:04,306 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:27:04,307 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:26:58" (1/3) ... [2023-11-23 21:27:04,310 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d38471d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:27:04, skipping insertion in model container [2023-11-23 21:27:04,310 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:00" (2/3) ... [2023-11-23 21:27:04,311 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d38471d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:27:04, skipping insertion in model container [2023-11-23 21:27:04,311 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:27:04" (3/3) ... [2023-11-23 21:27:04,314 INFO L112 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--misc--pch_phub.ko-main.cil.out.i [2023-11-23 21:27:04,338 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:27:04,338 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:27:04,441 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:27:04,449 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;@65e8e1e9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:27:04,450 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:27:04,459 INFO L276 IsEmpty]: Start isEmpty. Operand has 542 states, 323 states have (on average 1.278637770897833) internal successors, (413), 333 states have internal predecessors, (413), 187 states have call successors, (187), 30 states have call predecessors, (187), 30 states have return successors, (187), 187 states have call predecessors, (187), 187 states have call successors, (187) [2023-11-23 21:27:04,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-23 21:27:04,471 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:27:04,471 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:27:04,472 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:27:04,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:27:04,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1866776918, now seen corresponding path program 1 times [2023-11-23 21:27:04,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:27:04,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458762450] [2023-11-23 21:27:04,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:27:04,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:27:04,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:27:05,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:27:05,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:27:05,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458762450] [2023-11-23 21:27:05,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458762450] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:27:05,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:27:05,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:27:05,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603631931] [2023-11-23 21:27:05,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:27:05,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:27:05,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:27:05,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:27:05,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:27:05,106 INFO L87 Difference]: Start difference. First operand has 542 states, 323 states have (on average 1.278637770897833) internal successors, (413), 333 states have internal predecessors, (413), 187 states have call successors, (187), 30 states have call predecessors, (187), 30 states have return successors, (187), 187 states have call predecessors, (187), 187 states have call successors, (187) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:27:06,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:27:06,011 INFO L93 Difference]: Finished difference Result 1612 states and 2355 transitions. [2023-11-23 21:27:06,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:27:06,014 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-23 21:27:06,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:27:06,045 INFO L225 Difference]: With dead ends: 1612 [2023-11-23 21:27:06,045 INFO L226 Difference]: Without dead ends: 1069 [2023-11-23 21:27:06,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:27:06,063 INFO L413 NwaCegarLoop]: 669 mSDtfsCounter, 758 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 758 SdHoareTripleChecker+Valid, 1328 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:27:06,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [758 Valid, 1328 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 21:27:06,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2023-11-23 21:27:06,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 1065. [2023-11-23 21:27:06,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1065 states, 637 states have (on average 1.2668759811616954) internal successors, (807), 649 states have internal predecessors, (807), 369 states have call successors, (369), 59 states have call predecessors, (369), 58 states have return successors, (364), 364 states have call predecessors, (364), 364 states have call successors, (364) [2023-11-23 21:27:06,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 1540 transitions. [2023-11-23 21:27:06,292 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 1540 transitions. Word has length 11 [2023-11-23 21:27:06,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:27:06,292 INFO L495 AbstractCegarLoop]: Abstraction has 1065 states and 1540 transitions. [2023-11-23 21:27:06,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:27:06,293 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 1540 transitions. [2023-11-23 21:27:06,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-23 21:27:06,295 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:27:06,295 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:27:06,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:27:06,296 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:27:06,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:27:06,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1114365286, now seen corresponding path program 1 times [2023-11-23 21:27:06,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:27:06,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217997549] [2023-11-23 21:27:06,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:27:06,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:27:06,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:27:06,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:27:06,463 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:27:06,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217997549] [2023-11-23 21:27:06,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217997549] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:27:06,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:27:06,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:27:06,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082704756] [2023-11-23 21:27:06,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:27:06,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:27:06,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:27:06,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:27:06,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:27:06,480 INFO L87 Difference]: Start difference. First operand 1065 states and 1540 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:27:06,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:27:06,823 INFO L93 Difference]: Finished difference Result 1067 states and 1541 transitions. [2023-11-23 21:27:06,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:27:06,824 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-23 21:27:06,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:27:06,834 INFO L225 Difference]: With dead ends: 1067 [2023-11-23 21:27:06,835 INFO L226 Difference]: Without dead ends: 1064 [2023-11-23 21:27:06,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:27:06,837 INFO L413 NwaCegarLoop]: 660 mSDtfsCounter, 767 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 767 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:27:06,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [767 Valid, 660 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:27:06,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2023-11-23 21:27:06,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 1064. [2023-11-23 21:27:06,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1064 states, 637 states have (on average 1.2653061224489797) internal successors, (806), 648 states have internal predecessors, (806), 368 states have call successors, (368), 59 states have call predecessors, (368), 58 states have return successors, (364), 364 states have call predecessors, (364), 364 states have call successors, (364) [2023-11-23 21:27:06,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1538 transitions. [2023-11-23 21:27:06,950 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1538 transitions. Word has length 13 [2023-11-23 21:27:06,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:27:06,951 INFO L495 AbstractCegarLoop]: Abstraction has 1064 states and 1538 transitions. [2023-11-23 21:27:06,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:27:06,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1538 transitions. [2023-11-23 21:27:06,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-23 21:27:06,953 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:27:06,953 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:27:06,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:27:06,954 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:27:06,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:27:06,954 INFO L85 PathProgramCache]: Analyzing trace with hash 185218556, now seen corresponding path program 1 times [2023-11-23 21:27:06,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:27:06,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108706618] [2023-11-23 21:27:06,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:27:06,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:27:07,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:27:07,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:27:07,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:27:07,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108706618] [2023-11-23 21:27:07,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108706618] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:27:07,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:27:07,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:27:07,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547080996] [2023-11-23 21:27:07,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:27:07,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:27:07,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:27:07,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:27:07,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:27:07,136 INFO L87 Difference]: Start difference. First operand 1064 states and 1538 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:27:07,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:27:07,464 INFO L93 Difference]: Finished difference Result 1066 states and 1539 transitions. [2023-11-23 21:27:07,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:27:07,465 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-23 21:27:07,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:27:07,475 INFO L225 Difference]: With dead ends: 1066 [2023-11-23 21:27:07,475 INFO L226 Difference]: Without dead ends: 1063 [2023-11-23 21:27:07,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:27:07,478 INFO L413 NwaCegarLoop]: 658 mSDtfsCounter, 764 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 764 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:27:07,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [764 Valid, 658 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:27:07,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2023-11-23 21:27:07,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 1063. [2023-11-23 21:27:07,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1063 states, 637 states have (on average 1.2637362637362637) internal successors, (805), 647 states have internal predecessors, (805), 367 states have call successors, (367), 59 states have call predecessors, (367), 58 states have return successors, (364), 364 states have call predecessors, (364), 364 states have call successors, (364) [2023-11-23 21:27:07,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 1536 transitions. [2023-11-23 21:27:07,578 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 1536 transitions. Word has length 14 [2023-11-23 21:27:07,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:27:07,578 INFO L495 AbstractCegarLoop]: Abstraction has 1063 states and 1536 transitions. [2023-11-23 21:27:07,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:27:07,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 1536 transitions. [2023-11-23 21:27:07,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-23 21:27:07,584 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:27:07,585 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:27:07,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:27:07,585 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:27:07,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:27:07,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1446445865, now seen corresponding path program 1 times [2023-11-23 21:27:07,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:27:07,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709006713] [2023-11-23 21:27:07,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:27:07,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:27:07,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:27:07,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:27:07,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:27:07,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709006713] [2023-11-23 21:27:07,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709006713] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:27:07,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:27:07,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:27:07,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307339704] [2023-11-23 21:27:07,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:27:07,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:27:07,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:27:07,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:27:07,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:27:07,752 INFO L87 Difference]: Start difference. First operand 1063 states and 1536 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:27:08,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:27:08,360 INFO L93 Difference]: Finished difference Result 2002 states and 2888 transitions. [2023-11-23 21:27:08,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:27:08,361 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-23 21:27:08,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:27:08,378 INFO L225 Difference]: With dead ends: 2002 [2023-11-23 21:27:08,378 INFO L226 Difference]: Without dead ends: 1994 [2023-11-23 21:27:08,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:27:08,390 INFO L413 NwaCegarLoop]: 739 mSDtfsCounter, 681 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 1377 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:27:08,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [681 Valid, 1377 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:27:08,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1994 states. [2023-11-23 21:27:08,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1994 to 1994. [2023-11-23 21:27:08,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1994 states, 1190 states have (on average 1.2554621848739496) internal successors, (1494), 1210 states have internal predecessors, (1494), 693 states have call successors, (693), 113 states have call predecessors, (693), 110 states have return successors, (690), 686 states have call predecessors, (690), 690 states have call successors, (690) [2023-11-23 21:27:08,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1994 states to 1994 states and 2877 transitions. [2023-11-23 21:27:08,598 INFO L78 Accepts]: Start accepts. Automaton has 1994 states and 2877 transitions. Word has length 15 [2023-11-23 21:27:08,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:27:08,599 INFO L495 AbstractCegarLoop]: Abstraction has 1994 states and 2877 transitions. [2023-11-23 21:27:08,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:27:08,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states and 2877 transitions. [2023-11-23 21:27:08,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-23 21:27:08,605 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:27:08,605 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:27:08,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:27:08,609 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:27:08,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:27:08,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1315571130, now seen corresponding path program 1 times [2023-11-23 21:27:08,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:27:08,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780351358] [2023-11-23 21:27:08,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:27:08,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:27:08,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:27:08,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:27:08,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:27:08,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780351358] [2023-11-23 21:27:08,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780351358] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:27:08,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:27:08,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:27:08,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102923801] [2023-11-23 21:27:08,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:27:08,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:27:08,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:27:08,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:27:08,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:27:08,792 INFO L87 Difference]: Start difference. First operand 1994 states and 2877 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:27:09,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:27:09,529 INFO L93 Difference]: Finished difference Result 4335 states and 6251 transitions. [2023-11-23 21:27:09,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:27:09,530 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2023-11-23 21:27:09,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:27:09,548 INFO L225 Difference]: With dead ends: 4335 [2023-11-23 21:27:09,548 INFO L226 Difference]: Without dead ends: 2342 [2023-11-23 21:27:09,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:27:09,558 INFO L413 NwaCegarLoop]: 735 mSDtfsCounter, 641 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 1386 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:27:09,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [641 Valid, 1386 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:27:09,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2342 states. [2023-11-23 21:27:09,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2342 to 2335. [2023-11-23 21:27:09,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2335 states, 1385 states have (on average 1.2498194945848375) internal successors, (1731), 1408 states have internal predecessors, (1731), 819 states have call successors, (819), 132 states have call predecessors, (819), 130 states have return successors, (816), 814 states have call predecessors, (816), 816 states have call successors, (816) [2023-11-23 21:27:09,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2335 states to 2335 states and 3366 transitions. [2023-11-23 21:27:09,812 INFO L78 Accepts]: Start accepts. Automaton has 2335 states and 3366 transitions. Word has length 39 [2023-11-23 21:27:09,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:27:09,812 INFO L495 AbstractCegarLoop]: Abstraction has 2335 states and 3366 transitions. [2023-11-23 21:27:09,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:27:09,813 INFO L276 IsEmpty]: Start isEmpty. Operand 2335 states and 3366 transitions. [2023-11-23 21:27:09,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-23 21:27:09,817 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:27:09,817 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 21:27:09,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:27:09,818 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:27:09,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:27:09,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1473317259, now seen corresponding path program 1 times [2023-11-23 21:27:09,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:27:09,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373637426] [2023-11-23 21:27:09,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:27:09,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:27:09,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:27:10,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:27:10,152 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:27:10,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373637426] [2023-11-23 21:27:10,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373637426] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:27:10,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:27:10,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:27:10,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305403502] [2023-11-23 21:27:10,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:27:10,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:27:10,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:27:10,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:27:10,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:27:10,155 INFO L87 Difference]: Start difference. First operand 2335 states and 3366 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:27:11,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:27:11,493 INFO L93 Difference]: Finished difference Result 5137 states and 7407 transitions. [2023-11-23 21:27:11,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:27:11,494 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 47 [2023-11-23 21:27:11,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:27:11,522 INFO L225 Difference]: With dead ends: 5137 [2023-11-23 21:27:11,522 INFO L226 Difference]: Without dead ends: 3247 [2023-11-23 21:27:11,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:27:11,535 INFO L413 NwaCegarLoop]: 1202 mSDtfsCounter, 976 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 1856 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:27:11,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [976 Valid, 1856 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-23 21:27:11,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3247 states. [2023-11-23 21:27:11,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3247 to 3231. [2023-11-23 21:27:11,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3231 states, 1917 states have (on average 1.2498695878977568) internal successors, (2396), 1948 states have internal predecessors, (2396), 1133 states have call successors, (1133), 182 states have call predecessors, (1133), 180 states have return successors, (1130), 1128 states have call predecessors, (1130), 1130 states have call successors, (1130) [2023-11-23 21:27:11,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3231 states to 3231 states and 4659 transitions. [2023-11-23 21:27:11,960 INFO L78 Accepts]: Start accepts. Automaton has 3231 states and 4659 transitions. Word has length 47 [2023-11-23 21:27:11,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:27:11,960 INFO L495 AbstractCegarLoop]: Abstraction has 3231 states and 4659 transitions. [2023-11-23 21:27:11,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:27:11,961 INFO L276 IsEmpty]: Start isEmpty. Operand 3231 states and 4659 transitions. [2023-11-23 21:27:11,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-23 21:27:11,965 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:27:11,966 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 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] [2023-11-23 21:27:11,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:27:11,966 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:27:11,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:27:11,967 INFO L85 PathProgramCache]: Analyzing trace with hash -924068833, now seen corresponding path program 1 times [2023-11-23 21:27:11,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:27:11,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632258747] [2023-11-23 21:27:11,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:27:11,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:27:12,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:27:12,308 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-23 21:27:12,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:27:12,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632258747] [2023-11-23 21:27:12,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632258747] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:27:12,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:27:12,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:27:12,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618570022] [2023-11-23 21:27:12,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:27:12,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:27:12,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:27:12,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:27:12,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:27:12,311 INFO L87 Difference]: Start difference. First operand 3231 states and 4659 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-23 21:27:12,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:27:12,940 INFO L93 Difference]: Finished difference Result 6017 states and 8679 transitions. [2023-11-23 21:27:12,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:27:12,940 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 55 [2023-11-23 21:27:12,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:27:12,969 INFO L225 Difference]: With dead ends: 6017 [2023-11-23 21:27:12,969 INFO L226 Difference]: Without dead ends: 3231 [2023-11-23 21:27:12,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:27:12,987 INFO L413 NwaCegarLoop]: 643 mSDtfsCounter, 767 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 767 SdHoareTripleChecker+Valid, 1266 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:27:12,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [767 Valid, 1266 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:27:12,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3231 states. [2023-11-23 21:27:13,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3231 to 3231. [2023-11-23 21:27:13,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3231 states, 1917 states have (on average 1.2493479394887845) internal successors, (2395), 1948 states have internal predecessors, (2395), 1133 states have call successors, (1133), 182 states have call predecessors, (1133), 180 states have return successors, (1130), 1128 states have call predecessors, (1130), 1130 states have call successors, (1130) [2023-11-23 21:27:13,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3231 states to 3231 states and 4658 transitions. [2023-11-23 21:27:13,373 INFO L78 Accepts]: Start accepts. Automaton has 3231 states and 4658 transitions. Word has length 55 [2023-11-23 21:27:13,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:27:13,374 INFO L495 AbstractCegarLoop]: Abstraction has 3231 states and 4658 transitions. [2023-11-23 21:27:13,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-23 21:27:13,374 INFO L276 IsEmpty]: Start isEmpty. Operand 3231 states and 4658 transitions. [2023-11-23 21:27:13,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-23 21:27:13,379 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:27:13,380 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 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] [2023-11-23 21:27:13,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 21:27:13,380 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:27:13,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:27:13,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1191567754, now seen corresponding path program 1 times [2023-11-23 21:27:13,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:27:13,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998829760] [2023-11-23 21:27:13,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:27:13,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:27:13,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:27:13,835 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-23 21:27:13,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:27:13,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998829760] [2023-11-23 21:27:13,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998829760] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:27:13,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:27:13,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:27:13,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312469249] [2023-11-23 21:27:13,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:27:13,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:27:13,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:27:13,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:27:13,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:27:13,839 INFO L87 Difference]: Start difference. First operand 3231 states and 4658 transitions. Second operand has 6 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:27:14,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:27:14,715 INFO L93 Difference]: Finished difference Result 3266 states and 4694 transitions. [2023-11-23 21:27:14,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:27:14,716 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 56 [2023-11-23 21:27:14,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:27:14,746 INFO L225 Difference]: With dead ends: 3266 [2023-11-23 21:27:14,746 INFO L226 Difference]: Without dead ends: 3263 [2023-11-23 21:27:14,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:27:14,749 INFO L413 NwaCegarLoop]: 658 mSDtfsCounter, 120 mSDsluCounter, 1866 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 2524 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:27:14,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 2524 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 21:27:14,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3263 states. [2023-11-23 21:27:15,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3263 to 3263. [2023-11-23 21:27:15,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3263 states, 1936 states have (on average 1.2479338842975207) internal successors, (2416), 1966 states have internal predecessors, (2416), 1139 states have call successors, (1139), 190 states have call predecessors, (1139), 187 states have return successors, (1136), 1134 states have call predecessors, (1136), 1136 states have call successors, (1136) [2023-11-23 21:27:15,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3263 states to 3263 states and 4691 transitions. [2023-11-23 21:27:15,103 INFO L78 Accepts]: Start accepts. Automaton has 3263 states and 4691 transitions. Word has length 56 [2023-11-23 21:27:15,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:27:15,103 INFO L495 AbstractCegarLoop]: Abstraction has 3263 states and 4691 transitions. [2023-11-23 21:27:15,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:27:15,104 INFO L276 IsEmpty]: Start isEmpty. Operand 3263 states and 4691 transitions. [2023-11-23 21:27:15,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-23 21:27:15,111 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:27:15,111 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 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] [2023-11-23 21:27:15,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 21:27:15,111 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:27:15,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:27:15,112 INFO L85 PathProgramCache]: Analyzing trace with hash 778478259, now seen corresponding path program 1 times [2023-11-23 21:27:15,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:27:15,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103295731] [2023-11-23 21:27:15,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:27:15,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:27:15,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:27:16,049 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:27:16,049 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:27:16,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103295731] [2023-11-23 21:27:16,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103295731] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:27:16,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296298429] [2023-11-23 21:27:16,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:27:16,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:27:16,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59d97a87-eaf6-4349-8cd7-18b348ff8674/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:27:16,057 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59d97a87-eaf6-4349-8cd7-18b348ff8674/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:27:16,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59d97a87-eaf6-4349-8cd7-18b348ff8674/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:27:16,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:27:16,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 1114 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-23 21:27:16,537 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:27:17,061 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:27:17,062 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:27:17,536 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:27:17,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296298429] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:27:17,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [217566640] [2023-11-23 21:27:17,562 INFO L159 IcfgInterpreter]: Started Sifa with 43 locations of interest [2023-11-23 21:27:17,562 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:27:17,567 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:27:17,573 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:27:17,574 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs