./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.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_6f2e6116-802f-4f3e-891d-0e6639fcee3f/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f2e6116-802f-4f3e-891d-0e6639fcee3f/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_6f2e6116-802f-4f3e-891d-0e6639fcee3f/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f2e6116-802f-4f3e-891d-0e6639fcee3f/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f2e6116-802f-4f3e-891d-0e6639fcee3f/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_6f2e6116-802f-4f3e-891d-0e6639fcee3f/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 e3555fedd9f92961bad45780711b37c7eb42c00277e0bac6769cfc03eaec14a8 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:17:12,775 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:17:12,846 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f2e6116-802f-4f3e-891d-0e6639fcee3f/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 21:17:12,851 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:17:12,852 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:17:12,878 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:17:12,879 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:17:12,879 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:17:12,880 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:17:12,881 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:17:12,882 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:17:12,882 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:17:12,883 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:17:12,884 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:17:12,885 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:17:12,885 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:17:12,886 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:17:12,887 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:17:12,887 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:17:12,888 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:17:12,889 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:17:12,890 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:17:12,891 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:17:12,892 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:17:12,892 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:17:12,893 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:17:12,894 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:17:12,894 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:17:12,895 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:17:12,895 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:17:12,896 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:17:12,897 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:17:12,897 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:17:12,898 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:17:12,898 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:17:12,899 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:17:12,899 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:17:12,900 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:17:12,900 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:17:12,900 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:17:12,901 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:17:12,902 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:17:12,902 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:17:12,903 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:17:12,903 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_6f2e6116-802f-4f3e-891d-0e6639fcee3f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f2e6116-802f-4f3e-891d-0e6639fcee3f/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e3555fedd9f92961bad45780711b37c7eb42c00277e0bac6769cfc03eaec14a8 [2023-11-23 21:17:13,232 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:17:13,263 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:17:13,266 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:17:13,267 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:17:13,268 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:17:13,269 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f2e6116-802f-4f3e-891d-0e6639fcee3f/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i [2023-11-23 21:17:16,383 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:17:17,011 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:17:17,012 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f2e6116-802f-4f3e-891d-0e6639fcee3f/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i [2023-11-23 21:17:17,059 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f2e6116-802f-4f3e-891d-0e6639fcee3f/bin/utaipan-verify-mE87zJ7Ire/data/7db8de9db/3930eda3035c4a4983ef6e2d564ea80c/FLAG77b550fac [2023-11-23 21:17:17,077 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f2e6116-802f-4f3e-891d-0e6639fcee3f/bin/utaipan-verify-mE87zJ7Ire/data/7db8de9db/3930eda3035c4a4983ef6e2d564ea80c [2023-11-23 21:17:17,083 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:17:17,086 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:17:17,090 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:17:17,090 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:17:17,096 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:17:17,097 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:17:17" (1/1) ... [2023-11-23 21:17:17,098 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39e7db5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:17, skipping insertion in model container [2023-11-23 21:17:17,099 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:17:17" (1/1) ... [2023-11-23 21:17:17,290 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:17:18,233 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_6f2e6116-802f-4f3e-891d-0e6639fcee3f/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i[88044,88057] [2023-11-23 21:17:18,898 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:17:18,966 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:17:19,067 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("bt %2,%1\n\tsbb %0,%0": "=r" (oldbit): "m" (*((unsigned long *)addr)), "Ir" (nr)); [2776-2777] [2023-11-23 21:17:19,071 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movb %%gs:%P1,%0": "=q" (pfo_ret__): "p" (& current_task)); [2811] [2023-11-23 21:17:19,071 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movw %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& current_task)); [2814] [2023-11-23 21:17:19,072 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movl %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& current_task)); [2817] [2023-11-23 21:17:19,072 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movq %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& current_task)); [2820] [2023-11-23 21:17:19,109 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_6f2e6116-802f-4f3e-891d-0e6639fcee3f/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i[88044,88057] [2023-11-23 21:17:19,202 WARN L75 lationResultReporter]: Unsoundness Warning: ignored call to __builtin_prefetch C: __builtin_prefetch((void const *)ep->ep_list.next) [3893] [2023-11-23 21:17:19,206 WARN L75 lationResultReporter]: Unsoundness Warning: ignored call to __builtin_prefetch C: __builtin_prefetch((void const *)ep->ep_list.next) [3915] [2023-11-23 21:17:19,454 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:17:19,547 WARN L675 CHandler]: The function strrchr is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:17:19,548 WARN L675 CHandler]: The function kmem_cache_alloc_notrace is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:17:19,548 WARN L675 CHandler]: The function __bad_percpu_size is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:17:19,555 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:17:19,556 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:19 WrapperNode [2023-11-23 21:17:19,557 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:17:19,558 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:17:19,558 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:17:19,559 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:17:19,567 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:19" (1/1) ... [2023-11-23 21:17:19,670 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:19" (1/1) ... [2023-11-23 21:17:19,802 INFO L138 Inliner]: procedures = 203, calls = 1322, calls flagged for inlining = 90, calls inlined = 90, statements flattened = 3777 [2023-11-23 21:17:19,803 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:17:19,803 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:17:19,804 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:17:19,804 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:17:19,814 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:19" (1/1) ... [2023-11-23 21:17:19,814 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:19" (1/1) ... [2023-11-23 21:17:19,835 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:19" (1/1) ... [2023-11-23 21:17:19,835 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:19" (1/1) ... [2023-11-23 21:17:20,039 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:19" (1/1) ... [2023-11-23 21:17:20,075 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:19" (1/1) ... [2023-11-23 21:17:20,118 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:19" (1/1) ... [2023-11-23 21:17:20,139 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:19" (1/1) ... [2023-11-23 21:17:20,180 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:17:20,182 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:17:20,183 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:17:20,183 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:17:20,184 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:19" (1/1) ... [2023-11-23 21:17:20,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:17:20,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f2e6116-802f-4f3e-891d-0e6639fcee3f/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:17:20,220 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f2e6116-802f-4f3e-891d-0e6639fcee3f/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:17:20,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f2e6116-802f-4f3e-891d-0e6639fcee3f/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:17:20,268 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_free [2023-11-23 21:17:20,268 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_free [2023-11-23 21:17:20,268 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int_nonpositive [2023-11-23 21:17:20,268 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int_nonpositive [2023-11-23 21:17:20,269 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-23 21:17:20,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-23 21:17:20,269 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-23 21:17:20,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-23 21:17:20,270 INFO L130 BoogieDeclarations]: Found specification of procedure get_gadget_data [2023-11-23 21:17:20,271 INFO L138 BoogieDeclarations]: Found implementation of procedure get_gadget_data [2023-11-23 21:17:20,271 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_free_request [2023-11-23 21:17:20,271 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_free_request [2023-11-23 21:17:20,271 INFO L130 BoogieDeclarations]: Found specification of procedure printer_reset_interface [2023-11-23 21:17:20,272 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_reset_interface [2023-11-23 21:17:20,272 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2023-11-23 21:17:20,273 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2023-11-23 21:17:20,273 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-23 21:17:20,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-23 21:17:20,274 INFO L130 BoogieDeclarations]: Found specification of procedure printer_soft_reset [2023-11-23 21:17:20,275 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_soft_reset [2023-11-23 21:17:20,275 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_class [2023-11-23 21:17:20,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_class [2023-11-23 21:17:20,275 INFO L130 BoogieDeclarations]: Found specification of procedure list_del_init [2023-11-23 21:17:20,275 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del_init [2023-11-23 21:17:20,276 INFO L130 BoogieDeclarations]: Found specification of procedure setup_rx_reqs [2023-11-23 21:17:20,276 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_rx_reqs [2023-11-23 21:17:20,277 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-11-23 21:17:20,277 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-11-23 21:17:20,277 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-23 21:17:20,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-23 21:17:20,277 INFO L130 BoogieDeclarations]: Found specification of procedure usb_gadget_vbus_draw [2023-11-23 21:17:20,278 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_gadget_vbus_draw [2023-11-23 21:17:20,278 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 21:17:20,278 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 21:17:20,278 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2023-11-23 21:17:20,278 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2023-11-23 21:17:20,279 INFO L130 BoogieDeclarations]: Found specification of procedure poll_wait [2023-11-23 21:17:20,279 INFO L138 BoogieDeclarations]: Found implementation of procedure poll_wait [2023-11-23 21:17:20,279 INFO L130 BoogieDeclarations]: Found specification of procedure printer_fsync [2023-11-23 21:17:20,279 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_fsync [2023-11-23 21:17:20,279 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:17:20,279 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2023-11-23 21:17:20,280 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2023-11-23 21:17:20,280 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 21:17:20,280 INFO L130 BoogieDeclarations]: Found specification of procedure printer_open [2023-11-23 21:17:20,280 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_open [2023-11-23 21:17:20,280 INFO L130 BoogieDeclarations]: Found specification of procedure printer_bind [2023-11-23 21:17:20,281 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_bind [2023-11-23 21:17:20,281 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2023-11-23 21:17:20,281 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2023-11-23 21:17:20,281 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2023-11-23 21:17:20,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2023-11-23 21:17:20,282 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2023-11-23 21:17:20,283 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2023-11-23 21:17:20,283 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2023-11-23 21:17:20,284 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2023-11-23 21:17:20,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:17:20,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 21:17:20,284 INFO L130 BoogieDeclarations]: Found specification of procedure trace_kmalloc [2023-11-23 21:17:20,285 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_kmalloc [2023-11-23 21:17:20,285 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2023-11-23 21:17:20,285 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2023-11-23 21:17:20,285 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-23 21:17:20,286 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-23 21:17:20,286 INFO L130 BoogieDeclarations]: Found specification of procedure dev_err [2023-11-23 21:17:20,286 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_err [2023-11-23 21:17:20,286 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2023-11-23 21:17:20,287 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2023-11-23 21:17:20,287 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_chrdev_region [2023-11-23 21:17:20,287 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_chrdev_region [2023-11-23 21:17:20,287 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2023-11-23 21:17:20,287 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2023-11-23 21:17:20,288 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2023-11-23 21:17:20,288 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2023-11-23 21:17:20,288 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_alloc [2023-11-23 21:17:20,288 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_alloc [2023-11-23 21:17:20,290 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2023-11-23 21:17:20,290 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2023-11-23 21:17:20,291 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2023-11-23 21:17:20,291 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2023-11-23 21:17:20,291 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-23 21:17:20,291 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2023-11-23 21:17:20,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2023-11-23 21:17:20,291 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2023-11-23 21:17:20,291 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2023-11-23 21:17:20,291 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2023-11-23 21:17:20,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2023-11-23 21:17:20,292 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2023-11-23 21:17:20,292 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2023-11-23 21:17:20,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-23 21:17:20,292 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:17:20,293 INFO L130 BoogieDeclarations]: Found specification of procedure printer_poll [2023-11-23 21:17:20,293 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_poll [2023-11-23 21:17:20,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-11-23 21:17:20,293 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-11-23 21:17:20,293 INFO L130 BoogieDeclarations]: Found specification of procedure set_printer_interface [2023-11-23 21:17:20,294 INFO L138 BoogieDeclarations]: Found implementation of procedure set_printer_interface [2023-11-23 21:17:20,294 INFO L130 BoogieDeclarations]: Found specification of procedure class_destroy [2023-11-23 21:17:20,294 INFO L138 BoogieDeclarations]: Found implementation of procedure class_destroy [2023-11-23 21:17:20,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:17:20,295 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_queue [2023-11-23 21:17:20,295 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_queue [2023-11-23 21:17:20,295 INFO L130 BoogieDeclarations]: Found specification of procedure set_interface [2023-11-23 21:17:20,295 INFO L138 BoogieDeclarations]: Found implementation of procedure set_interface [2023-11-23 21:17:20,296 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup_complete [2023-11-23 21:17:20,296 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup_complete [2023-11-23 21:17:20,296 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-23 21:17:20,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-23 21:17:20,296 INFO L130 BoogieDeclarations]: Found specification of procedure printer_write [2023-11-23 21:17:20,296 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_write [2023-11-23 21:17:20,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:17:20,297 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2023-11-23 21:17:20,297 INFO L130 BoogieDeclarations]: Found specification of procedure printer_unbind [2023-11-23 21:17:20,297 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_unbind [2023-11-23 21:17:20,297 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_alloc_notrace [2023-11-23 21:17:20,298 INFO L130 BoogieDeclarations]: Found specification of procedure printer_close [2023-11-23 21:17:20,298 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_close [2023-11-23 21:17:20,298 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2023-11-23 21:17:20,298 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2023-11-23 21:17:20,298 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:17:20,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 21:17:20,299 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2023-11-23 21:17:20,299 INFO L130 BoogieDeclarations]: Found specification of procedure init_utsname [2023-11-23 21:17:20,299 INFO L138 BoogieDeclarations]: Found implementation of procedure init_utsname [2023-11-23 21:17:20,299 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_enable [2023-11-23 21:17:20,299 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_enable [2023-11-23 21:17:20,300 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_notrace [2023-11-23 21:17:20,300 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_notrace [2023-11-23 21:17:20,300 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2023-11-23 21:17:20,300 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2023-11-23 21:17:20,300 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2023-11-23 21:17:20,301 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2023-11-23 21:17:20,301 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_autoconfig [2023-11-23 21:17:20,301 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_autoconfig [2023-11-23 21:17:20,302 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait [2023-11-23 21:17:20,302 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait [2023-11-23 21:17:20,303 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2023-11-23 21:17:20,303 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2023-11-23 21:17:20,304 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup [2023-11-23 21:17:20,306 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup [2023-11-23 21:17:20,306 INFO L130 BoogieDeclarations]: Found specification of procedure set_gadget_data [2023-11-23 21:17:20,306 INFO L138 BoogieDeclarations]: Found implementation of procedure set_gadget_data [2023-11-23 21:17:20,306 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-23 21:17:20,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-23 21:17:20,308 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_disable [2023-11-23 21:17:20,308 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_disable [2023-11-23 21:17:20,308 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2023-11-23 21:17:20,309 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2023-11-23 21:17:20,310 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_chrdev_region [2023-11-23 21:17:20,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_chrdev_region [2023-11-23 21:17:20,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:17:20,310 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2023-11-23 21:17:20,311 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2023-11-23 21:17:20,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:17:20,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:17:20,312 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2023-11-23 21:17:20,312 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2023-11-23 21:17:20,969 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:17:20,975 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:17:21,272 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-23 21:17:27,192 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:17:28,845 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:17:28,845 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 21:17:28,848 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:17:28 BoogieIcfgContainer [2023-11-23 21:17:28,848 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:17:28,852 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:17:28,852 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:17:28,855 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:17:28,856 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:17:17" (1/3) ... [2023-11-23 21:17:28,858 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b335c93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:17:28, skipping insertion in model container [2023-11-23 21:17:28,858 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:19" (2/3) ... [2023-11-23 21:17:28,859 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b335c93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:17:28, skipping insertion in model container [2023-11-23 21:17:28,859 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:17:28" (3/3) ... [2023-11-23 21:17:28,861 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i [2023-11-23 21:17:28,897 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:17:28,897 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:17:28,988 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:17:28,995 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;@14d576cf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:17:28,996 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:17:29,007 INFO L276 IsEmpty]: Start isEmpty. Operand has 1094 states, 660 states have (on average 1.3681818181818182) internal successors, (903), 703 states have internal predecessors, (903), 364 states have call successors, (364), 69 states have call predecessors, (364), 68 states have return successors, (360), 357 states have call predecessors, (360), 360 states have call successors, (360) [2023-11-23 21:17:29,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-23 21:17:29,025 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:29,026 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:17:29,026 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:29,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:29,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1693928541, now seen corresponding path program 1 times [2023-11-23 21:17:29,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:29,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394402061] [2023-11-23 21:17:29,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:29,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:31,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:31,813 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-23 21:17:31,814 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:31,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394402061] [2023-11-23 21:17:31,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394402061] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:31,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:31,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:17:31,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212017207] [2023-11-23 21:17:31,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:31,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:17:31,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:31,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:17:31,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:31,871 INFO L87 Difference]: Start difference. First operand has 1094 states, 660 states have (on average 1.3681818181818182) internal successors, (903), 703 states have internal predecessors, (903), 364 states have call successors, (364), 69 states have call predecessors, (364), 68 states have return successors, (360), 357 states have call predecessors, (360), 360 states have call successors, (360) Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-23 21:17:33,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:17:35,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:17:38,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:38,023 INFO L93 Difference]: Finished difference Result 3128 states and 4705 transitions. [2023-11-23 21:17:38,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:17:38,028 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 54 [2023-11-23 21:17:38,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:38,077 INFO L225 Difference]: With dead ends: 3128 [2023-11-23 21:17:38,077 INFO L226 Difference]: Without dead ends: 2034 [2023-11-23 21:17:38,093 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 21:17:38,097 INFO L413 NwaCegarLoop]: 1531 mSDtfsCounter, 1511 mSDsluCounter, 1344 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1511 SdHoareTripleChecker+Valid, 2875 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:38,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1511 Valid, 2875 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 324 Invalid, 2 Unknown, 0 Unchecked, 5.8s Time] [2023-11-23 21:17:38,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2034 states. [2023-11-23 21:17:38,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2034 to 2028. [2023-11-23 21:17:38,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 1228 states have (on average 1.3550488599348534) internal successors, (1664), 1288 states have internal predecessors, (1664), 670 states have call successors, (670), 130 states have call predecessors, (670), 129 states have return successors, (657), 651 states have call predecessors, (657), 657 states have call successors, (657) [2023-11-23 21:17:38,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 2991 transitions. [2023-11-23 21:17:38,426 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 2991 transitions. Word has length 54 [2023-11-23 21:17:38,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:38,428 INFO L495 AbstractCegarLoop]: Abstraction has 2028 states and 2991 transitions. [2023-11-23 21:17:38,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-23 21:17:38,429 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 2991 transitions. [2023-11-23 21:17:38,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-23 21:17:38,445 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:38,445 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:17:38,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:17:38,446 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:38,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:38,447 INFO L85 PathProgramCache]: Analyzing trace with hash -477623505, now seen corresponding path program 1 times [2023-11-23 21:17:38,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:38,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851402449] [2023-11-23 21:17:38,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:38,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:39,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:40,165 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-23 21:17:40,166 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:40,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851402449] [2023-11-23 21:17:40,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851402449] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:40,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:40,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:17:40,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753812269] [2023-11-23 21:17:40,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:40,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:17:40,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:40,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:17:40,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:40,177 INFO L87 Difference]: Start difference. First operand 2028 states and 2991 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-23 21:17:42,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:17:44,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:44,100 INFO L93 Difference]: Finished difference Result 4008 states and 5916 transitions. [2023-11-23 21:17:44,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:17:44,101 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2023-11-23 21:17:44,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:44,134 INFO L225 Difference]: With dead ends: 4008 [2023-11-23 21:17:44,134 INFO L226 Difference]: Without dead ends: 3983 [2023-11-23 21:17:44,137 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 21:17:44,138 INFO L413 NwaCegarLoop]: 1499 mSDtfsCounter, 1521 mSDsluCounter, 1337 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1521 SdHoareTripleChecker+Valid, 2836 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:44,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1521 Valid, 2836 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 320 Invalid, 1 Unknown, 0 Unchecked, 3.6s Time] [2023-11-23 21:17:44,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3983 states. [2023-11-23 21:17:44,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3983 to 3979. [2023-11-23 21:17:44,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3979 states, 2415 states have (on average 1.3527950310559007) internal successors, (3267), 2523 states have internal predecessors, (3267), 1311 states have call successors, (1311), 255 states have call predecessors, (1311), 252 states have return successors, (1299), 1284 states have call predecessors, (1299), 1299 states have call successors, (1299) [2023-11-23 21:17:44,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3979 states to 3979 states and 5877 transitions. [2023-11-23 21:17:44,411 INFO L78 Accepts]: Start accepts. Automaton has 3979 states and 5877 transitions. Word has length 54 [2023-11-23 21:17:44,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:44,412 INFO L495 AbstractCegarLoop]: Abstraction has 3979 states and 5877 transitions. [2023-11-23 21:17:44,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-23 21:17:44,412 INFO L276 IsEmpty]: Start isEmpty. Operand 3979 states and 5877 transitions. [2023-11-23 21:17:44,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-23 21:17:44,415 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:44,415 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:17:44,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:17:44,416 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:44,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:44,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1922502886, now seen corresponding path program 1 times [2023-11-23 21:17:44,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:44,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413323012] [2023-11-23 21:17:44,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:44,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:45,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:45,899 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-23 21:17:45,900 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:45,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413323012] [2023-11-23 21:17:45,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413323012] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:45,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:45,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:17:45,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200299333] [2023-11-23 21:17:45,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:45,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:17:45,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:45,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:17:45,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:45,909 INFO L87 Difference]: Start difference. First operand 3979 states and 5877 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-23 21:17:47,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:17:50,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:50,146 INFO L93 Difference]: Finished difference Result 11873 states and 17553 transitions. [2023-11-23 21:17:50,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:17:50,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 55 [2023-11-23 21:17:50,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:50,238 INFO L225 Difference]: With dead ends: 11873 [2023-11-23 21:17:50,238 INFO L226 Difference]: Without dead ends: 7907 [2023-11-23 21:17:50,266 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 21:17:50,271 INFO L413 NwaCegarLoop]: 1567 mSDtfsCounter, 1522 mSDsluCounter, 1346 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1522 SdHoareTripleChecker+Valid, 2913 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:50,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1522 Valid, 2913 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 324 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2023-11-23 21:17:50,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7907 states. [2023-11-23 21:17:50,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7907 to 7896. [2023-11-23 21:17:50,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7896 states, 4798 states have (on average 1.3532721967486452) internal successors, (6493), 5006 states have internal predecessors, (6493), 2599 states have call successors, (2599), 503 states have call predecessors, (2599), 498 states have return successors, (2581), 2554 states have call predecessors, (2581), 2581 states have call successors, (2581) [2023-11-23 21:17:51,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7896 states to 7896 states and 11673 transitions. [2023-11-23 21:17:51,010 INFO L78 Accepts]: Start accepts. Automaton has 7896 states and 11673 transitions. Word has length 55 [2023-11-23 21:17:51,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:51,011 INFO L495 AbstractCegarLoop]: Abstraction has 7896 states and 11673 transitions. [2023-11-23 21:17:51,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-23 21:17:51,013 INFO L276 IsEmpty]: Start isEmpty. Operand 7896 states and 11673 transitions. [2023-11-23 21:17:51,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-23 21:17:51,019 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:51,019 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:17:51,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:17:51,020 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:51,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:51,020 INFO L85 PathProgramCache]: Analyzing trace with hash -699932888, now seen corresponding path program 1 times [2023-11-23 21:17:51,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:51,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135231609] [2023-11-23 21:17:51,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:51,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:52,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:52,494 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-23 21:17:52,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:52,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135231609] [2023-11-23 21:17:52,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135231609] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:52,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:52,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:17:52,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640702185] [2023-11-23 21:17:52,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:52,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:17:52,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:52,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:17:52,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:52,498 INFO L87 Difference]: Start difference. First operand 7896 states and 11673 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-23 21:17:54,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:17:56,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:56,937 INFO L93 Difference]: Finished difference Result 23646 states and 34966 transitions. [2023-11-23 21:17:56,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:17:56,938 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 71 [2023-11-23 21:17:56,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:57,105 INFO L225 Difference]: With dead ends: 23646 [2023-11-23 21:17:57,105 INFO L226 Difference]: Without dead ends: 15760 [2023-11-23 21:17:57,158 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 21:17:57,162 INFO L413 NwaCegarLoop]: 1433 mSDtfsCounter, 1515 mSDsluCounter, 1365 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1515 SdHoareTripleChecker+Valid, 2798 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:57,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1515 Valid, 2798 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 316 Invalid, 1 Unknown, 0 Unchecked, 3.6s Time] [2023-11-23 21:17:57,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15760 states. [2023-11-23 21:17:58,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15760 to 15721. [2023-11-23 21:17:58,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15721 states, 9563 states have (on average 1.3536547108647914) internal successors, (12945), 9969 states have internal predecessors, (12945), 5167 states have call successors, (5167), 998 states have call predecessors, (5167), 990 states have return successors, (5147), 5089 states have call predecessors, (5147), 5147 states have call successors, (5147) [2023-11-23 21:17:58,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15721 states to 15721 states and 23259 transitions. [2023-11-23 21:17:58,366 INFO L78 Accepts]: Start accepts. Automaton has 15721 states and 23259 transitions. Word has length 71 [2023-11-23 21:17:58,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:58,368 INFO L495 AbstractCegarLoop]: Abstraction has 15721 states and 23259 transitions. [2023-11-23 21:17:58,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-23 21:17:58,369 INFO L276 IsEmpty]: Start isEmpty. Operand 15721 states and 23259 transitions. [2023-11-23 21:17:58,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-23 21:17:58,374 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:58,375 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:17:58,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:17:58,375 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:58,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:58,376 INFO L85 PathProgramCache]: Analyzing trace with hash 997073526, now seen corresponding path program 1 times [2023-11-23 21:17:58,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:58,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257016220] [2023-11-23 21:17:58,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:58,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:59,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat