./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.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_e86d441b-afa7-4d63-ba64-e8bfc0e91418/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e86d441b-afa7-4d63-ba64-e8bfc0e91418/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_e86d441b-afa7-4d63-ba64-e8bfc0e91418/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e86d441b-afa7-4d63-ba64-e8bfc0e91418/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e86d441b-afa7-4d63-ba64-e8bfc0e91418/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_e86d441b-afa7-4d63-ba64-e8bfc0e91418/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 275849fbaca37e76eea790df33e2de383489441cc01df773179ecf6c76094336 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:23:43,931 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:23:44,011 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e86d441b-afa7-4d63-ba64-e8bfc0e91418/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 21:23:44,016 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:23:44,017 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:23:44,044 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:23:44,044 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:23:44,045 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:23:44,046 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:23:44,048 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:23:44,049 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:23:44,050 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:23:44,051 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:23:44,053 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:23:44,054 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:23:44,054 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:23:44,057 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:23:44,058 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:23:44,058 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:23:44,059 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:23:44,062 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:23:44,063 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:23:44,064 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:23:44,064 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:23:44,064 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:23:44,065 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:23:44,065 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:23:44,066 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:23:44,066 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:23:44,066 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:23:44,067 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:23:44,067 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:23:44,067 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:23:44,068 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:23:44,068 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:23:44,069 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:23:44,069 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:23:44,069 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:23:44,069 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:23:44,070 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:23:44,070 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:23:44,070 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:23:44,070 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:23:44,071 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:23:44,071 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_e86d441b-afa7-4d63-ba64-e8bfc0e91418/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e86d441b-afa7-4d63-ba64-e8bfc0e91418/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 275849fbaca37e76eea790df33e2de383489441cc01df773179ecf6c76094336 [2023-11-23 21:23:44,351 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:23:44,373 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:23:44,375 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:23:44,377 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:23:44,377 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:23:44,379 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e86d441b-afa7-4d63-ba64-e8bfc0e91418/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i [2023-11-23 21:23:47,560 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:23:48,197 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:23:48,204 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e86d441b-afa7-4d63-ba64-e8bfc0e91418/sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i [2023-11-23 21:23:48,247 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e86d441b-afa7-4d63-ba64-e8bfc0e91418/bin/utaipan-verify-mE87zJ7Ire/data/cd667fa7b/b91eff345e8b411cb0443156b707e595/FLAG324823940 [2023-11-23 21:23:48,262 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e86d441b-afa7-4d63-ba64-e8bfc0e91418/bin/utaipan-verify-mE87zJ7Ire/data/cd667fa7b/b91eff345e8b411cb0443156b707e595 [2023-11-23 21:23:48,265 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:23:48,266 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:23:48,268 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:23:48,268 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:23:48,274 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:23:48,274 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:23:48" (1/1) ... [2023-11-23 21:23:48,276 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4395a902 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:48, skipping insertion in model container [2023-11-23 21:23:48,276 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:23:48" (1/1) ... [2023-11-23 21:23:48,379 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:23:49,699 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_e86d441b-afa7-4d63-ba64-e8bfc0e91418/sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i[158757,158770] [2023-11-23 21:23:49,757 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:23:49,825 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:23:49,926 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)); [2775-2776] [2023-11-23 21:23:49,930 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movb %%gs:%P1,%0": "=q" (pfo_ret__): "p" (& current_task)); [2794] [2023-11-23 21:23:49,930 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movw %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& current_task)); [2797] [2023-11-23 21:23:49,931 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movl %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& current_task)); [2800] [2023-11-23 21:23:49,931 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movq %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& current_task)); [2803] [2023-11-23 21:23:50,040 WARN L75 lationResultReporter]: Unsoundness Warning: ignored call to __builtin_prefetch C: __builtin_prefetch((void const *)ep->ep_list.next) [3806] [2023-11-23 21:23:50,041 WARN L75 lationResultReporter]: Unsoundness Warning: ignored call to __builtin_prefetch C: __builtin_prefetch((void const *)ep->ep_list.next) [3828] [2023-11-23 21:23:50,199 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_e86d441b-afa7-4d63-ba64-e8bfc0e91418/sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i[158757,158770] [2023-11-23 21:23:50,217 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:23:50,288 WARN L675 CHandler]: The function strrchr is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:23:50,289 WARN L675 CHandler]: The function kmem_cache_alloc_notrace is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:23:50,289 WARN L675 CHandler]: The function __bad_percpu_size is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:23:50,296 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:23:50,297 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:50 WrapperNode [2023-11-23 21:23:50,298 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:23:50,299 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:23:50,299 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:23:50,299 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:23:50,307 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:50" (1/1) ... [2023-11-23 21:23:50,394 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:50" (1/1) ... [2023-11-23 21:23:50,564 INFO L138 Inliner]: procedures = 191, calls = 1310, calls flagged for inlining = 86, calls inlined = 86, statements flattened = 3618 [2023-11-23 21:23:50,565 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:23:50,566 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:23:50,566 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:23:50,566 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:23:50,575 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:50" (1/1) ... [2023-11-23 21:23:50,575 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:50" (1/1) ... [2023-11-23 21:23:50,619 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:50" (1/1) ... [2023-11-23 21:23:50,620 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:50" (1/1) ... [2023-11-23 21:23:50,781 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:50" (1/1) ... [2023-11-23 21:23:50,814 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:50" (1/1) ... [2023-11-23 21:23:50,846 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:50" (1/1) ... [2023-11-23 21:23:50,871 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:50" (1/1) ... [2023-11-23 21:23:50,900 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:23:50,903 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:23:50,903 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:23:50,904 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:23:50,905 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:50" (1/1) ... [2023-11-23 21:23:50,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:23:50,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e86d441b-afa7-4d63-ba64-e8bfc0e91418/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:23:50,941 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e86d441b-afa7-4d63-ba64-e8bfc0e91418/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:23:50,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e86d441b-afa7-4d63-ba64-e8bfc0e91418/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:23:50,981 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_free [2023-11-23 21:23:50,981 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_free [2023-11-23 21:23:50,981 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2023-11-23 21:23:50,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2023-11-23 21:23:50,981 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2023-11-23 21:23:50,981 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2023-11-23 21:23:50,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-23 21:23:50,982 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-23 21:23:50,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-23 21:23:50,983 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:23:50,983 INFO L130 BoogieDeclarations]: Found specification of procedure get_gadget_data [2023-11-23 21:23:50,983 INFO L138 BoogieDeclarations]: Found implementation of procedure get_gadget_data [2023-11-23 21:23:50,983 INFO L130 BoogieDeclarations]: Found specification of procedure printer_poll [2023-11-23 21:23:50,983 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_poll [2023-11-23 21:23:50,983 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-11-23 21:23:50,984 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-11-23 21:23:50,985 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_free_request [2023-11-23 21:23:50,985 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_free_request [2023-11-23 21:23:50,985 INFO L130 BoogieDeclarations]: Found specification of procedure printer_reset_interface [2023-11-23 21:23:50,986 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_reset_interface [2023-11-23 21:23:50,986 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2023-11-23 21:23:50,986 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2023-11-23 21:23:50,986 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-23 21:23:50,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-23 21:23:50,986 INFO L130 BoogieDeclarations]: Found specification of procedure printer_soft_reset [2023-11-23 21:23:50,987 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_soft_reset [2023-11-23 21:23:50,987 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_nonpositive_int [2023-11-23 21:23:50,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_nonpositive_int [2023-11-23 21:23:50,987 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_class [2023-11-23 21:23:50,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_class [2023-11-23 21:23:50,987 INFO L130 BoogieDeclarations]: Found specification of procedure list_del_init [2023-11-23 21:23:50,988 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del_init [2023-11-23 21:23:50,988 INFO L130 BoogieDeclarations]: Found specification of procedure set_printer_interface [2023-11-23 21:23:50,988 INFO L138 BoogieDeclarations]: Found implementation of procedure set_printer_interface [2023-11-23 21:23:50,988 INFO L130 BoogieDeclarations]: Found specification of procedure setup_rx_reqs [2023-11-23 21:23:50,988 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_rx_reqs [2023-11-23 21:23:50,988 INFO L130 BoogieDeclarations]: Found specification of procedure class_destroy [2023-11-23 21:23:50,988 INFO L138 BoogieDeclarations]: Found implementation of procedure class_destroy [2023-11-23 21:23:50,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:23:50,989 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-11-23 21:23:50,989 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-11-23 21:23:50,989 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-23 21:23:50,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-23 21:23:50,989 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_queue [2023-11-23 21:23:50,990 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_queue [2023-11-23 21:23:50,990 INFO L130 BoogieDeclarations]: Found specification of procedure set_interface [2023-11-23 21:23:50,990 INFO L138 BoogieDeclarations]: Found implementation of procedure set_interface [2023-11-23 21:23:50,990 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup_complete [2023-11-23 21:23:50,990 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup_complete [2023-11-23 21:23:50,990 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2023-11-23 21:23:50,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2023-11-23 21:23:50,991 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-23 21:23:50,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-23 21:23:50,992 INFO L130 BoogieDeclarations]: Found specification of procedure usb_gadget_vbus_draw [2023-11-23 21:23:50,992 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_gadget_vbus_draw [2023-11-23 21:23:50,993 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:23:50,993 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2023-11-23 21:23:50,993 INFO L130 BoogieDeclarations]: Found specification of procedure printer_unbind [2023-11-23 21:23:50,993 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_unbind [2023-11-23 21:23:50,993 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_alloc_notrace [2023-11-23 21:23:50,994 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2023-11-23 21:23:50,994 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2023-11-23 21:23:50,994 INFO L130 BoogieDeclarations]: Found specification of procedure printer_close [2023-11-23 21:23:50,995 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_close [2023-11-23 21:23:50,995 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2023-11-23 21:23:50,995 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2023-11-23 21:23:50,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:23:50,995 INFO L130 BoogieDeclarations]: Found specification of procedure poll_wait [2023-11-23 21:23:50,995 INFO L138 BoogieDeclarations]: Found implementation of procedure poll_wait [2023-11-23 21:23:50,996 INFO L130 BoogieDeclarations]: Found specification of procedure printer_fsync [2023-11-23 21:23:50,996 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_fsync [2023-11-23 21:23:50,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:23:50,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 21:23:50,996 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2023-11-23 21:23:50,996 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2023-11-23 21:23:50,997 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2023-11-23 21:23:50,997 INFO L130 BoogieDeclarations]: Found specification of procedure init_utsname [2023-11-23 21:23:50,997 INFO L138 BoogieDeclarations]: Found implementation of procedure init_utsname [2023-11-23 21:23:50,998 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_enable [2023-11-23 21:23:50,998 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_enable [2023-11-23 21:23:50,998 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 21:23:50,998 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_notrace [2023-11-23 21:23:50,998 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_notrace [2023-11-23 21:23:50,998 INFO L130 BoogieDeclarations]: Found specification of procedure printer_open [2023-11-23 21:23:50,999 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_open [2023-11-23 21:23:50,999 INFO L130 BoogieDeclarations]: Found specification of procedure printer_bind [2023-11-23 21:23:50,999 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_bind [2023-11-23 21:23:50,999 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2023-11-23 21:23:50,999 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2023-11-23 21:23:51,000 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2023-11-23 21:23:51,000 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2023-11-23 21:23:51,000 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2023-11-23 21:23:51,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2023-11-23 21:23:51,000 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2023-11-23 21:23:51,000 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2023-11-23 21:23:51,000 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2023-11-23 21:23:51,001 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2023-11-23 21:23:51,001 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2023-11-23 21:23:51,001 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2023-11-23 21:23:51,001 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_autoconfig [2023-11-23 21:23:51,002 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_autoconfig [2023-11-23 21:23:51,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:23:51,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 21:23:51,002 INFO L130 BoogieDeclarations]: Found specification of procedure trace_kmalloc [2023-11-23 21:23:51,002 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_kmalloc [2023-11-23 21:23:51,003 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2023-11-23 21:23:51,004 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2023-11-23 21:23:51,004 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait [2023-11-23 21:23:51,004 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait [2023-11-23 21:23:51,004 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-23 21:23:51,004 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-23 21:23:51,004 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2023-11-23 21:23:51,004 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2023-11-23 21:23:51,005 INFO L130 BoogieDeclarations]: Found specification of procedure dev_err [2023-11-23 21:23:51,005 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_err [2023-11-23 21:23:51,005 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup [2023-11-23 21:23:51,005 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup [2023-11-23 21:23:51,005 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2023-11-23 21:23:51,005 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2023-11-23 21:23:51,006 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_chrdev_region [2023-11-23 21:23:51,006 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_chrdev_region [2023-11-23 21:23:51,006 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2023-11-23 21:23:51,007 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2023-11-23 21:23:51,007 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2023-11-23 21:23:51,007 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2023-11-23 21:23:51,007 INFO L130 BoogieDeclarations]: Found specification of procedure set_gadget_data [2023-11-23 21:23:51,008 INFO L138 BoogieDeclarations]: Found implementation of procedure set_gadget_data [2023-11-23 21:23:51,008 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_alloc [2023-11-23 21:23:51,008 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_alloc [2023-11-23 21:23:51,008 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-23 21:23:51,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-23 21:23:51,008 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2023-11-23 21:23:51,009 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2023-11-23 21:23:51,009 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_disable [2023-11-23 21:23:51,009 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_disable [2023-11-23 21:23:51,009 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2023-11-23 21:23:51,010 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2023-11-23 21:23:51,010 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_chrdev_region [2023-11-23 21:23:51,013 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_chrdev_region [2023-11-23 21:23:51,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:23:51,014 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2023-11-23 21:23:51,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2023-11-23 21:23:51,015 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2023-11-23 21:23:51,015 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2023-11-23 21:23:51,016 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-23 21:23:51,016 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2023-11-23 21:23:51,016 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2023-11-23 21:23:51,021 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2023-11-23 21:23:51,022 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2023-11-23 21:23:51,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:23:51,022 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:23:51,022 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2023-11-23 21:23:51,022 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2023-11-23 21:23:51,658 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:23:51,665 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:23:57,904 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:23:59,307 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:23:59,307 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 21:23:59,310 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:23:59 BoogieIcfgContainer [2023-11-23 21:23:59,310 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:23:59,314 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:23:59,314 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:23:59,317 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:23:59,317 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:23:48" (1/3) ... [2023-11-23 21:23:59,318 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d871ace and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:23:59, skipping insertion in model container [2023-11-23 21:23:59,318 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:50" (2/3) ... [2023-11-23 21:23:59,320 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d871ace and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:23:59, skipping insertion in model container [2023-11-23 21:23:59,320 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:23:59" (3/3) ... [2023-11-23 21:23:59,321 INFO L112 eAbstractionObserver]: Analyzing ICFG m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i [2023-11-23 21:23:59,341 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:23:59,341 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:23:59,414 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:23:59,420 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;@48a9f41c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:23:59,421 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:23:59,430 INFO L276 IsEmpty]: Start isEmpty. Operand has 1049 states, 622 states have (on average 1.3569131832797428) internal successors, (844), 662 states have internal predecessors, (844), 358 states have call successors, (358), 67 states have call predecessors, (358), 67 states have return successors, (358), 355 states have call predecessors, (358), 358 states have call successors, (358) [2023-11-23 21:23:59,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-23 21:23:59,438 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:59,438 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:59,439 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:23:59,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:59,444 INFO L85 PathProgramCache]: Analyzing trace with hash -566795227, now seen corresponding path program 1 times [2023-11-23 21:23:59,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:59,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288281796] [2023-11-23 21:23:59,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:59,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:01,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:01,761 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 21:24:01,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:01,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288281796] [2023-11-23 21:24:01,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288281796] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:24:01,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:24:01,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:24:01,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192222400] [2023-11-23 21:24:01,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:24:01,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:24:01,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:01,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:24:01,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:24:01,817 INFO L87 Difference]: Start difference. First operand has 1049 states, 622 states have (on average 1.3569131832797428) internal successors, (844), 662 states have internal predecessors, (844), 358 states have call successors, (358), 67 states have call predecessors, (358), 67 states have return successors, (358), 355 states have call predecessors, (358), 358 states have call successors, (358) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:24:03,886 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 21:24:05,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:05,816 INFO L93 Difference]: Finished difference Result 3011 states and 4536 transitions. [2023-11-23 21:24:05,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:24:05,818 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2023-11-23 21:24:05,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:05,856 INFO L225 Difference]: With dead ends: 3011 [2023-11-23 21:24:05,856 INFO L226 Difference]: Without dead ends: 1965 [2023-11-23 21:24:05,867 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 21:24:05,870 INFO L413 NwaCegarLoop]: 1670 mSDtfsCounter, 1491 mSDsluCounter, 1262 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1491 SdHoareTripleChecker+Valid, 2932 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:05,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1491 Valid, 2932 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 334 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2023-11-23 21:24:05,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1965 states. [2023-11-23 21:24:06,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1965 to 1960. [2023-11-23 21:24:06,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1960 states, 1164 states have (on average 1.3445017182130585) internal successors, (1565), 1222 states have internal predecessors, (1565), 671 states have call successors, (671), 126 states have call predecessors, (671), 124 states have return successors, (662), 655 states have call predecessors, (662), 662 states have call successors, (662) [2023-11-23 21:24:06,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1960 states to 1960 states and 2898 transitions. [2023-11-23 21:24:06,105 INFO L78 Accepts]: Start accepts. Automaton has 1960 states and 2898 transitions. Word has length 15 [2023-11-23 21:24:06,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:06,106 INFO L495 AbstractCegarLoop]: Abstraction has 1960 states and 2898 transitions. [2023-11-23 21:24:06,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:24:06,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1960 states and 2898 transitions. [2023-11-23 21:24:06,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-23 21:24:06,108 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:06,108 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:24:06,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:24:06,108 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:24:06,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:06,109 INFO L85 PathProgramCache]: Analyzing trace with hash -391926127, now seen corresponding path program 1 times [2023-11-23 21:24:06,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:06,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453439156] [2023-11-23 21:24:06,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:06,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:07,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:07,826 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 21:24:07,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:07,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453439156] [2023-11-23 21:24:07,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453439156] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:24:07,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:24:07,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:24:07,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140503520] [2023-11-23 21:24:07,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:24:07,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:24:07,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:07,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:24:07,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:24:07,833 INFO L87 Difference]: Start difference. First operand 1960 states and 2898 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:24:09,933 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:24:12,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:12,232 INFO L93 Difference]: Finished difference Result 4851 states and 7174 transitions. [2023-11-23 21:24:12,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:24:12,233 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2023-11-23 21:24:12,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:12,267 INFO L225 Difference]: With dead ends: 4851 [2023-11-23 21:24:12,267 INFO L226 Difference]: Without dead ends: 3891 [2023-11-23 21:24:12,274 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 21:24:12,276 INFO L413 NwaCegarLoop]: 2565 mSDtfsCounter, 1485 mSDsluCounter, 1310 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1485 SdHoareTripleChecker+Valid, 3875 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:12,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1485 Valid, 3875 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 440 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2023-11-23 21:24:12,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3891 states. [2023-11-23 21:24:12,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3891 to 3882. [2023-11-23 21:24:12,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3882 states, 2308 states have (on average 1.3444540727902947) internal successors, (3103), 2418 states have internal predecessors, (3103), 1326 states have call successors, (1326), 251 states have call predecessors, (1326), 247 states have return successors, (1314), 1300 states have call predecessors, (1314), 1314 states have call successors, (1314) [2023-11-23 21:24:12,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3882 states to 3882 states and 5743 transitions. [2023-11-23 21:24:12,532 INFO L78 Accepts]: Start accepts. Automaton has 3882 states and 5743 transitions. Word has length 16 [2023-11-23 21:24:12,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:12,532 INFO L495 AbstractCegarLoop]: Abstraction has 3882 states and 5743 transitions. [2023-11-23 21:24:12,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:24:12,533 INFO L276 IsEmpty]: Start isEmpty. Operand 3882 states and 5743 transitions. [2023-11-23 21:24:12,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-23 21:24:12,534 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:12,535 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] [2023-11-23 21:24:12,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:24:12,535 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:24:12,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:12,536 INFO L85 PathProgramCache]: Analyzing trace with hash 653799068, now seen corresponding path program 1 times [2023-11-23 21:24:12,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:12,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707510951] [2023-11-23 21:24:12,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:12,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:13,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:13,836 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 21:24:13,837 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:13,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707510951] [2023-11-23 21:24:13,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707510951] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:24:13,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:24:13,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:24:13,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678435043] [2023-11-23 21:24:13,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:24:13,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:24:13,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:13,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:24:13,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:24:13,840 INFO L87 Difference]: Start difference. First operand 3882 states and 5743 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:24:15,882 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 21:24:18,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:18,208 INFO L93 Difference]: Finished difference Result 8677 states and 12834 transitions. [2023-11-23 21:24:18,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:24:18,209 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), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2023-11-23 21:24:18,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:18,275 INFO L225 Difference]: With dead ends: 8677 [2023-11-23 21:24:18,275 INFO L226 Difference]: Without dead ends: 7704 [2023-11-23 21:24:18,282 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 21:24:18,285 INFO L413 NwaCegarLoop]: 2095 mSDtfsCounter, 1476 mSDsluCounter, 1299 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1476 SdHoareTripleChecker+Valid, 3394 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:18,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1476 Valid, 3394 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 368 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2023-11-23 21:24:18,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7704 states. [2023-11-23 21:24:18,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7704 to 7683. [2023-11-23 21:24:18,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7683 states, 4568 states have (on average 1.3447898423817863) internal successors, (6143), 4784 states have internal predecessors, (6143), 2623 states have call successors, (2623), 497 states have call predecessors, (2623), 491 states have return successors, (2609), 2577 states have call predecessors, (2609), 2609 states have call successors, (2609) [2023-11-23 21:24:18,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7683 states to 7683 states and 11375 transitions. [2023-11-23 21:24:18,854 INFO L78 Accepts]: Start accepts. Automaton has 7683 states and 11375 transitions. Word has length 32 [2023-11-23 21:24:18,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:18,855 INFO L495 AbstractCegarLoop]: Abstraction has 7683 states and 11375 transitions. [2023-11-23 21:24:18,856 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), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:24:18,856 INFO L276 IsEmpty]: Start isEmpty. Operand 7683 states and 11375 transitions. [2023-11-23 21:24:18,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-23 21:24:18,863 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:18,863 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] [2023-11-23 21:24:18,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:24:18,864 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:24:18,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:18,864 INFO L85 PathProgramCache]: Analyzing trace with hash -322261094, now seen corresponding path program 1 times [2023-11-23 21:24:18,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:18,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986512022] [2023-11-23 21:24:18,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:18,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:20,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:22,902 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 21:24:22,903 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:22,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986512022] [2023-11-23 21:24:22,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986512022] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:24:22,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:24:22,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-23 21:24:22,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722690528] [2023-11-23 21:24:22,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:24:22,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 21:24:22,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:22,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 21:24:22,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2023-11-23 21:24:22,906 INFO L87 Difference]: Start difference. First operand 7683 states and 11375 transitions. Second operand has 12 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-23 21:24:24,955 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 21:24:26,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:24:29,021 WARN L539 Checker$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 21:24:31,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:24:33,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:24:35,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:24:37,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []