./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 cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e929d310-0e2d-4720-9ebe-0022b74980c2/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e929d310-0e2d-4720-9ebe-0022b74980c2/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e929d310-0e2d-4720-9ebe-0022b74980c2/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e929d310-0e2d-4720-9ebe-0022b74980c2/bin/utaipan-verify-NcY6lQBIFX/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_e929d310-0e2d-4720-9ebe-0022b74980c2/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e929d310-0e2d-4720-9ebe-0022b74980c2/bin/utaipan-verify-NcY6lQBIFX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash e3555fedd9f92961bad45780711b37c7eb42c00277e0bac6769cfc03eaec14a8 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:59:42,473 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:59:42,549 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e929d310-0e2d-4720-9ebe-0022b74980c2/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-12 00:59:42,553 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:59:42,554 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:59:42,578 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:59:42,579 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:59:42,580 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:59:42,581 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:59:42,581 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:59:42,582 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:59:42,582 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:59:42,583 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:59:42,583 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:59:42,584 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:59:42,585 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:59:42,585 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:59:42,586 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:59:42,586 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:59:42,587 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:59:42,587 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:59:42,588 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:59:42,588 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:59:42,589 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:59:42,589 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:59:42,590 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:59:42,590 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:59:42,590 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:59:42,591 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:59:42,591 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:59:42,592 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:59:42,592 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:59:42,593 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:59:42,593 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:59:42,594 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:59:42,594 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:59:42,594 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:59:42,595 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:59:42,595 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:59:42,596 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:59:42,596 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:59:42,597 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:59:42,597 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_e929d310-0e2d-4720-9ebe-0022b74980c2/bin/utaipan-verify-NcY6lQBIFX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e929d310-0e2d-4720-9ebe-0022b74980c2/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e3555fedd9f92961bad45780711b37c7eb42c00277e0bac6769cfc03eaec14a8 [2023-11-12 00:59:42,859 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:59:42,901 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:59:42,903 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:59:42,904 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:59:42,905 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:59:42,906 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e929d310-0e2d-4720-9ebe-0022b74980c2/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i [2023-11-12 00:59:45,965 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:59:46,584 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:59:46,586 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e929d310-0e2d-4720-9ebe-0022b74980c2/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i [2023-11-12 00:59:46,636 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e929d310-0e2d-4720-9ebe-0022b74980c2/bin/utaipan-verify-NcY6lQBIFX/data/943a19438/94143d8d28904ede85d1a8953e52c5c2/FLAG349810a22 [2023-11-12 00:59:46,654 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e929d310-0e2d-4720-9ebe-0022b74980c2/bin/utaipan-verify-NcY6lQBIFX/data/943a19438/94143d8d28904ede85d1a8953e52c5c2 [2023-11-12 00:59:46,662 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:59:46,665 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:59:46,668 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:59:46,669 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:59:46,674 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:59:46,675 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:59:46" (1/1) ... [2023-11-12 00:59:46,676 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@618d6d1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:46, skipping insertion in model container [2023-11-12 00:59:46,676 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:59:46" (1/1) ... [2023-11-12 00:59:46,799 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:59:47,765 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_e929d310-0e2d-4720-9ebe-0022b74980c2/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] [2023-11-12 00:59:48,426 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:59:48,497 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:59:48,578 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] [2023-11-12 00:59:48,581 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movb %%gs:%P1,%0": "=q" (pfo_ret__): "p" (& current_task)); [2811] [2023-11-12 00:59:48,582 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movw %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& current_task)); [2814] [2023-11-12 00:59:48,582 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movl %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& current_task)); [2817] [2023-11-12 00:59:48,582 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movq %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& current_task)); [2820] [2023-11-12 00:59:48,611 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_e929d310-0e2d-4720-9ebe-0022b74980c2/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] [2023-11-12 00:59:48,655 WARN L75 lationResultReporter]: Unsoundness Warning: ignored call to __builtin_prefetch C: __builtin_prefetch((void const *)ep->ep_list.next) [3893] [2023-11-12 00:59:48,657 WARN L75 lationResultReporter]: Unsoundness Warning: ignored call to __builtin_prefetch C: __builtin_prefetch((void const *)ep->ep_list.next) [3915] [2023-11-12 00:59:48,816 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:59:48,888 WARN L672 CHandler]: The function strrchr is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:48,888 WARN L672 CHandler]: The function kmem_cache_alloc_notrace is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:48,888 WARN L672 CHandler]: The function __bad_percpu_size is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:48,896 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:59:48,896 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:48 WrapperNode [2023-11-12 00:59:48,897 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:59:48,898 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:59:48,898 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:59:48,898 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:59:48,907 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:48" (1/1) ... [2023-11-12 00:59:49,006 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:48" (1/1) ... [2023-11-12 00:59:49,147 INFO L138 Inliner]: procedures = 203, calls = 1322, calls flagged for inlining = 90, calls inlined = 90, statements flattened = 3777 [2023-11-12 00:59:49,148 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:59:49,148 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:59:49,149 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:59:49,149 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:59:49,159 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:48" (1/1) ... [2023-11-12 00:59:49,159 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:48" (1/1) ... [2023-11-12 00:59:49,178 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:48" (1/1) ... [2023-11-12 00:59:49,178 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:48" (1/1) ... [2023-11-12 00:59:49,369 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:48" (1/1) ... [2023-11-12 00:59:49,389 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:48" (1/1) ... [2023-11-12 00:59:49,407 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:48" (1/1) ... [2023-11-12 00:59:49,429 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:48" (1/1) ... [2023-11-12 00:59:49,451 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:59:49,452 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:59:49,452 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:59:49,452 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:59:49,453 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:48" (1/1) ... [2023-11-12 00:59:49,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:59:49,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e929d310-0e2d-4720-9ebe-0022b74980c2/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:49,492 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e929d310-0e2d-4720-9ebe-0022b74980c2/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:59:49,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e929d310-0e2d-4720-9ebe-0022b74980c2/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:59:49,538 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_free [2023-11-12 00:59:49,538 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_free [2023-11-12 00:59:49,538 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int_nonpositive [2023-11-12 00:59:49,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int_nonpositive [2023-11-12 00:59:49,539 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-12 00:59:49,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-12 00:59:49,539 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-12 00:59:49,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-12 00:59:49,539 INFO L130 BoogieDeclarations]: Found specification of procedure get_gadget_data [2023-11-12 00:59:49,540 INFO L138 BoogieDeclarations]: Found implementation of procedure get_gadget_data [2023-11-12 00:59:49,540 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_free_request [2023-11-12 00:59:49,540 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_free_request [2023-11-12 00:59:49,541 INFO L130 BoogieDeclarations]: Found specification of procedure printer_reset_interface [2023-11-12 00:59:49,541 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_reset_interface [2023-11-12 00:59:49,541 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2023-11-12 00:59:49,541 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2023-11-12 00:59:49,541 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-12 00:59:49,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-12 00:59:49,543 INFO L130 BoogieDeclarations]: Found specification of procedure printer_soft_reset [2023-11-12 00:59:49,543 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_soft_reset [2023-11-12 00:59:49,543 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_class [2023-11-12 00:59:49,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_class [2023-11-12 00:59:49,545 INFO L130 BoogieDeclarations]: Found specification of procedure list_del_init [2023-11-12 00:59:49,545 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del_init [2023-11-12 00:59:49,546 INFO L130 BoogieDeclarations]: Found specification of procedure setup_rx_reqs [2023-11-12 00:59:49,546 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_rx_reqs [2023-11-12 00:59:49,546 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-11-12 00:59:49,547 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-11-12 00:59:49,547 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-12 00:59:49,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-12 00:59:49,547 INFO L130 BoogieDeclarations]: Found specification of procedure usb_gadget_vbus_draw [2023-11-12 00:59:49,547 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_gadget_vbus_draw [2023-11-12 00:59:49,547 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 00:59:49,548 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 00:59:49,548 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2023-11-12 00:59:49,549 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2023-11-12 00:59:49,549 INFO L130 BoogieDeclarations]: Found specification of procedure poll_wait [2023-11-12 00:59:49,549 INFO L138 BoogieDeclarations]: Found implementation of procedure poll_wait [2023-11-12 00:59:49,549 INFO L130 BoogieDeclarations]: Found specification of procedure printer_fsync [2023-11-12 00:59:49,549 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_fsync [2023-11-12 00:59:49,549 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:59:49,550 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2023-11-12 00:59:49,550 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2023-11-12 00:59:49,550 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 00:59:49,550 INFO L130 BoogieDeclarations]: Found specification of procedure printer_open [2023-11-12 00:59:49,550 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_open [2023-11-12 00:59:49,550 INFO L130 BoogieDeclarations]: Found specification of procedure printer_bind [2023-11-12 00:59:49,550 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_bind [2023-11-12 00:59:49,551 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2023-11-12 00:59:49,551 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2023-11-12 00:59:49,551 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2023-11-12 00:59:49,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2023-11-12 00:59:49,551 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2023-11-12 00:59:49,552 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2023-11-12 00:59:49,552 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2023-11-12 00:59:49,553 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2023-11-12 00:59:49,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:59:49,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-12 00:59:49,554 INFO L130 BoogieDeclarations]: Found specification of procedure trace_kmalloc [2023-11-12 00:59:49,554 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_kmalloc [2023-11-12 00:59:49,554 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2023-11-12 00:59:49,554 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2023-11-12 00:59:49,554 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-12 00:59:49,555 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-12 00:59:49,555 INFO L130 BoogieDeclarations]: Found specification of procedure dev_err [2023-11-12 00:59:49,555 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_err [2023-11-12 00:59:49,555 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2023-11-12 00:59:49,555 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2023-11-12 00:59:49,556 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_chrdev_region [2023-11-12 00:59:49,556 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_chrdev_region [2023-11-12 00:59:49,556 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2023-11-12 00:59:49,556 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2023-11-12 00:59:49,556 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2023-11-12 00:59:49,556 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2023-11-12 00:59:49,556 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_alloc [2023-11-12 00:59:49,556 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_alloc [2023-11-12 00:59:49,557 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2023-11-12 00:59:49,557 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2023-11-12 00:59:49,558 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2023-11-12 00:59:49,558 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2023-11-12 00:59:49,558 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-12 00:59:49,558 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2023-11-12 00:59:49,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2023-11-12 00:59:49,558 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2023-11-12 00:59:49,558 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2023-11-12 00:59:49,558 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2023-11-12 00:59:49,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2023-11-12 00:59:49,559 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2023-11-12 00:59:49,559 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2023-11-12 00:59:49,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-12 00:59:49,559 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:59:49,559 INFO L130 BoogieDeclarations]: Found specification of procedure printer_poll [2023-11-12 00:59:49,559 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_poll [2023-11-12 00:59:49,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-11-12 00:59:49,560 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-11-12 00:59:49,560 INFO L130 BoogieDeclarations]: Found specification of procedure set_printer_interface [2023-11-12 00:59:49,560 INFO L138 BoogieDeclarations]: Found implementation of procedure set_printer_interface [2023-11-12 00:59:49,560 INFO L130 BoogieDeclarations]: Found specification of procedure class_destroy [2023-11-12 00:59:49,560 INFO L138 BoogieDeclarations]: Found implementation of procedure class_destroy [2023-11-12 00:59:49,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:59:49,561 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_queue [2023-11-12 00:59:49,561 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_queue [2023-11-12 00:59:49,561 INFO L130 BoogieDeclarations]: Found specification of procedure set_interface [2023-11-12 00:59:49,562 INFO L138 BoogieDeclarations]: Found implementation of procedure set_interface [2023-11-12 00:59:49,562 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup_complete [2023-11-12 00:59:49,562 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup_complete [2023-11-12 00:59:49,562 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-12 00:59:49,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-12 00:59:49,563 INFO L130 BoogieDeclarations]: Found specification of procedure printer_write [2023-11-12 00:59:49,563 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_write [2023-11-12 00:59:49,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 00:59:49,564 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2023-11-12 00:59:49,564 INFO L130 BoogieDeclarations]: Found specification of procedure printer_unbind [2023-11-12 00:59:49,564 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_unbind [2023-11-12 00:59:49,564 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_alloc_notrace [2023-11-12 00:59:49,564 INFO L130 BoogieDeclarations]: Found specification of procedure printer_close [2023-11-12 00:59:49,564 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_close [2023-11-12 00:59:49,565 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2023-11-12 00:59:49,565 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2023-11-12 00:59:49,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:59:49,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 00:59:49,565 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2023-11-12 00:59:49,565 INFO L130 BoogieDeclarations]: Found specification of procedure init_utsname [2023-11-12 00:59:49,565 INFO L138 BoogieDeclarations]: Found implementation of procedure init_utsname [2023-11-12 00:59:49,565 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_enable [2023-11-12 00:59:49,566 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_enable [2023-11-12 00:59:49,566 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_notrace [2023-11-12 00:59:49,566 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_notrace [2023-11-12 00:59:49,567 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2023-11-12 00:59:49,567 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2023-11-12 00:59:49,567 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2023-11-12 00:59:49,567 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2023-11-12 00:59:49,567 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_autoconfig [2023-11-12 00:59:49,567 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_autoconfig [2023-11-12 00:59:49,567 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait [2023-11-12 00:59:49,568 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait [2023-11-12 00:59:49,568 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2023-11-12 00:59:49,568 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2023-11-12 00:59:49,569 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup [2023-11-12 00:59:49,569 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup [2023-11-12 00:59:49,572 INFO L130 BoogieDeclarations]: Found specification of procedure set_gadget_data [2023-11-12 00:59:49,573 INFO L138 BoogieDeclarations]: Found implementation of procedure set_gadget_data [2023-11-12 00:59:49,574 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-12 00:59:49,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-12 00:59:49,575 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_disable [2023-11-12 00:59:49,575 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_disable [2023-11-12 00:59:49,576 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2023-11-12 00:59:49,576 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2023-11-12 00:59:49,577 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_chrdev_region [2023-11-12 00:59:49,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_chrdev_region [2023-11-12 00:59:49,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:59:49,581 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2023-11-12 00:59:49,582 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2023-11-12 00:59:49,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:59:49,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:59:49,582 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2023-11-12 00:59:49,582 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2023-11-12 00:59:50,205 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:59:50,209 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:59:50,481 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-12 01:00:10,612 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 01:00:12,026 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 01:00:12,027 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 01:00:12,033 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:00:12 BoogieIcfgContainer [2023-11-12 01:00:12,033 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 01:00:12,037 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 01:00:12,037 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 01:00:12,041 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 01:00:12,041 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:59:46" (1/3) ... [2023-11-12 01:00:12,042 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32b5011b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:00:12, skipping insertion in model container [2023-11-12 01:00:12,042 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:48" (2/3) ... [2023-11-12 01:00:12,043 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32b5011b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:00:12, skipping insertion in model container [2023-11-12 01:00:12,043 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:00:12" (3/3) ... [2023-11-12 01:00:12,044 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i [2023-11-12 01:00:12,065 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 01:00:12,066 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 01:00:12,160 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 01:00:12,170 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;@40770fbb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 01:00:12,171 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 01:00:12,183 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) [2023-11-12 01:00:12,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-12 01:00:12,201 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:12,201 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] [2023-11-12 01:00:12,202 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:00:12,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:12,206 INFO L85 PathProgramCache]: Analyzing trace with hash -2112225931, now seen corresponding path program 1 times [2023-11-12 01:00:12,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:12,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112921965] [2023-11-12 01:00:12,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:12,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:13,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:14,434 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-12 01:00:14,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:14,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112921965] [2023-11-12 01:00:14,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112921965] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:00:14,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:00:14,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 01:00:14,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322838802] [2023-11-12 01:00:14,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:00:14,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:00:14,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:14,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:00:14,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:00:14,496 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) [2023-11-12 01:00:16,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 01:00:18,621 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 [] [2023-11-12 01:00:20,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:20,132 INFO L93 Difference]: Finished difference Result 3128 states and 4705 transitions. [2023-11-12 01:00:20,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:00:20,137 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 [2023-11-12 01:00:20,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:20,191 INFO L225 Difference]: With dead ends: 3128 [2023-11-12 01:00:20,192 INFO L226 Difference]: Without dead ends: 2034 [2023-11-12 01:00:20,208 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 [2023-11-12 01:00:20,212 INFO L413 NwaCegarLoop]: 1531 mSDtfsCounter, 1511 mSDsluCounter, 1344 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s 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, 5.4s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:20,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1511 Valid, 2875 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 324 Invalid, 2 Unknown, 0 Unchecked, 5.4s Time] [2023-11-12 01:00:20,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2034 states. [2023-11-12 01:00:20,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2034 to 2028. [2023-11-12 01:00:20,472 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) [2023-11-12 01:00:20,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 2991 transitions. [2023-11-12 01:00:20,500 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 2991 transitions. Word has length 54 [2023-11-12 01:00:20,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:20,502 INFO L495 AbstractCegarLoop]: Abstraction has 2028 states and 2991 transitions. [2023-11-12 01:00:20,502 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) [2023-11-12 01:00:20,502 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 2991 transitions. [2023-11-12 01:00:20,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-12 01:00:20,512 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:20,512 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] [2023-11-12 01:00:20,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 01:00:20,513 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:00:20,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:20,514 INFO L85 PathProgramCache]: Analyzing trace with hash -510076315, now seen corresponding path program 1 times [2023-11-12 01:00:20,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:20,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252831207] [2023-11-12 01:00:20,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:20,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:21,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:22,092 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-12 01:00:22,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:22,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252831207] [2023-11-12 01:00:22,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252831207] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:00:22,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:00:22,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 01:00:22,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135865002] [2023-11-12 01:00:22,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:00:22,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:00:22,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:22,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:00:22,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:00:22,098 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) [2023-11-12 01:00:24,144 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 [] [2023-11-12 01:00:25,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:25,625 INFO L93 Difference]: Finished difference Result 4008 states and 5916 transitions. [2023-11-12 01:00:25,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:00:25,626 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 [2023-11-12 01:00:25,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:25,662 INFO L225 Difference]: With dead ends: 4008 [2023-11-12 01:00:25,662 INFO L226 Difference]: Without dead ends: 3983 [2023-11-12 01:00:25,666 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 [2023-11-12 01:00:25,667 INFO L413 NwaCegarLoop]: 1499 mSDtfsCounter, 1521 mSDsluCounter, 1337 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s 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, 3.3s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:25,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1521 Valid, 2836 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 320 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2023-11-12 01:00:25,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3983 states. [2023-11-12 01:00:25,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3983 to 3979. [2023-11-12 01:00:25,932 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) [2023-11-12 01:00:25,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3979 states to 3979 states and 5877 transitions. [2023-11-12 01:00:25,973 INFO L78 Accepts]: Start accepts. Automaton has 3979 states and 5877 transitions. Word has length 54 [2023-11-12 01:00:25,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:25,978 INFO L495 AbstractCegarLoop]: Abstraction has 3979 states and 5877 transitions. [2023-11-12 01:00:25,978 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) [2023-11-12 01:00:25,979 INFO L276 IsEmpty]: Start isEmpty. Operand 3979 states and 5877 transitions. [2023-11-12 01:00:25,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-12 01:00:25,983 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:25,983 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] [2023-11-12 01:00:25,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 01:00:25,984 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:00:25,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:25,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1366427300, now seen corresponding path program 1 times [2023-11-12 01:00:25,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:25,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048298546] [2023-11-12 01:00:25,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:25,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:27,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:27,380 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-12 01:00:27,380 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:27,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048298546] [2023-11-12 01:00:27,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048298546] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:00:27,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:00:27,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 01:00:27,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369889549] [2023-11-12 01:00:27,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:00:27,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:00:27,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:27,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:00:27,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:00:27,383 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) [2023-11-12 01:00:29,426 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 [] [2023-11-12 01:00:30,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:30,957 INFO L93 Difference]: Finished difference Result 11873 states and 17553 transitions. [2023-11-12 01:00:30,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:00:30,958 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 [2023-11-12 01:00:30,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:31,035 INFO L225 Difference]: With dead ends: 11873 [2023-11-12 01:00:31,035 INFO L226 Difference]: Without dead ends: 7907 [2023-11-12 01:00:31,059 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 [2023-11-12 01:00:31,064 INFO L413 NwaCegarLoop]: 1567 mSDtfsCounter, 1522 mSDsluCounter, 1346 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s 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, 3.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:31,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1522 Valid, 2913 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 324 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2023-11-12 01:00:31,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7907 states. [2023-11-12 01:00:31,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7907 to 7896. [2023-11-12 01:00:31,735 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) [2023-11-12 01:00:31,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7896 states to 7896 states and 11673 transitions. [2023-11-12 01:00:31,799 INFO L78 Accepts]: Start accepts. Automaton has 7896 states and 11673 transitions. Word has length 55 [2023-11-12 01:00:31,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:31,801 INFO L495 AbstractCegarLoop]: Abstraction has 7896 states and 11673 transitions. [2023-11-12 01:00:31,802 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) [2023-11-12 01:00:31,802 INFO L276 IsEmpty]: Start isEmpty. Operand 7896 states and 11673 transitions. [2023-11-12 01:00:31,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-12 01:00:31,806 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:31,806 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] [2023-11-12 01:00:31,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 01:00:31,807 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:00:31,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:31,808 INFO L85 PathProgramCache]: Analyzing trace with hash -330076191, now seen corresponding path program 1 times [2023-11-12 01:00:31,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:31,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063927935] [2023-11-12 01:00:31,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:31,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:33,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:33,263 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-12 01:00:33,263 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:33,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063927935] [2023-11-12 01:00:33,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063927935] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:00:33,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:00:33,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 01:00:33,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760415308] [2023-11-12 01:00:33,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:00:33,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:00:33,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:33,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:00:33,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:00:33,266 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) [2023-11-12 01:00:35,324 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 []