./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-1.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_9b095334-b6b2-4ec0-bcc6-1bba4b4eca70/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b095334-b6b2-4ec0-bcc6-1bba4b4eca70/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b095334-b6b2-4ec0-bcc6-1bba4b4eca70/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b095334-b6b2-4ec0-bcc6-1bba4b4eca70/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b095334-b6b2-4ec0-bcc6-1bba4b4eca70/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b095334-b6b2-4ec0-bcc6-1bba4b4eca70/bin/utaipan-verify-t7M7D8N6sZ --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 cb8f0ebb3c2471fcffc912ab6e7b9ec5c4e0cbee8604050053df01c587aed5a7 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:13:58,414 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:13:58,518 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b095334-b6b2-4ec0-bcc6-1bba4b4eca70/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-19 04:13:58,527 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:13:58,528 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:13:58,574 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:13:58,574 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:13:58,575 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:13:58,576 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:13:58,581 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:13:58,581 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:13:58,582 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:13:58,583 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:13:58,584 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:13:58,585 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:13:58,585 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:13:58,585 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:13:58,586 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:13:58,586 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:13:58,587 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:13:58,587 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:13:58,588 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:13:58,589 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:13:58,589 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:13:58,589 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:13:58,590 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:13:58,590 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:13:58,591 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:13:58,591 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:13:58,591 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:13:58,593 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:13:58,593 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:13:58,593 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:13:58,593 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:13:58,594 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:13:58,594 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:13:58,594 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:13:58,594 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:13:58,595 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:13:58,595 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:13:58,595 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:13:58,595 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:13:58,596 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_9b095334-b6b2-4ec0-bcc6-1bba4b4eca70/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b095334-b6b2-4ec0-bcc6-1bba4b4eca70/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb8f0ebb3c2471fcffc912ab6e7b9ec5c4e0cbee8604050053df01c587aed5a7 [2023-11-19 04:13:58,846 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:13:58,866 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:13:58,869 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:13:58,870 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:13:58,871 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:13:58,872 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b095334-b6b2-4ec0-bcc6-1bba4b4eca70/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i [2023-11-19 04:14:01,995 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:14:02,561 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:14:02,563 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b095334-b6b2-4ec0-bcc6-1bba4b4eca70/sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i [2023-11-19 04:14:02,603 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b095334-b6b2-4ec0-bcc6-1bba4b4eca70/bin/utaipan-verify-t7M7D8N6sZ/data/f9e07fd96/c94c95e554374e189982ff7fbbc57329/FLAGf56a70197 [2023-11-19 04:14:02,618 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b095334-b6b2-4ec0-bcc6-1bba4b4eca70/bin/utaipan-verify-t7M7D8N6sZ/data/f9e07fd96/c94c95e554374e189982ff7fbbc57329 [2023-11-19 04:14:02,620 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:14:02,622 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:14:02,623 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:14:02,623 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:14:02,635 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:14:02,639 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:14:02" (1/1) ... [2023-11-19 04:14:02,640 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c4acd7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:14:02, skipping insertion in model container [2023-11-19 04:14:02,640 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:14:02" (1/1) ... [2023-11-19 04:14:02,781 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:14:04,110 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_9b095334-b6b2-4ec0-bcc6-1bba4b4eca70/sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i[158757,158770] [2023-11-19 04:14:04,158 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:14:04,198 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:14:04,290 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] [2023-11-19 04:14:04,293 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movb %%gs:%P1,%0": "=q" (pfo_ret__): "p" (& current_task)); [2794] [2023-11-19 04:14:04,293 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movw %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& current_task)); [2797] [2023-11-19 04:14:04,293 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movl %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& current_task)); [2800] [2023-11-19 04:14:04,294 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movq %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& current_task)); [2803] [2023-11-19 04:14:04,354 WARN L75 lationResultReporter]: Unsoundness Warning: ignored call to __builtin_prefetch C: __builtin_prefetch((void const *)ep->ep_list.next) [3806] [2023-11-19 04:14:04,356 WARN L75 lationResultReporter]: Unsoundness Warning: ignored call to __builtin_prefetch C: __builtin_prefetch((void const *)ep->ep_list.next) [3828] [2023-11-19 04:14:04,466 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_9b095334-b6b2-4ec0-bcc6-1bba4b4eca70/sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i[158757,158770] [2023-11-19 04:14:04,485 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:14:04,633 WARN L675 CHandler]: The function strrchr is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 04:14:04,634 WARN L675 CHandler]: The function kmem_cache_alloc_notrace is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 04:14:04,634 WARN L675 CHandler]: The function __bad_percpu_size is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 04:14:04,643 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:14:04,644 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:14:04 WrapperNode [2023-11-19 04:14:04,644 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:14:04,646 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:14:04,646 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:14:04,646 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:14:04,655 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:14:04" (1/1) ... [2023-11-19 04:14:04,748 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:14:04" (1/1) ... [2023-11-19 04:14:04,928 INFO L138 Inliner]: procedures = 191, calls = 1310, calls flagged for inlining = 86, calls inlined = 86, statements flattened = 3618 [2023-11-19 04:14:04,928 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:14:04,929 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:14:04,929 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:14:04,929 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:14:04,939 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:14:04" (1/1) ... [2023-11-19 04:14:04,939 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:14:04" (1/1) ... [2023-11-19 04:14:05,037 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:14:04" (1/1) ... [2023-11-19 04:14:05,038 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:14:04" (1/1) ... [2023-11-19 04:14:05,157 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:14:04" (1/1) ... [2023-11-19 04:14:05,191 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:14:04" (1/1) ... [2023-11-19 04:14:05,217 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:14:04" (1/1) ... [2023-11-19 04:14:05,236 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:14:04" (1/1) ... [2023-11-19 04:14:05,302 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:14:05,304 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:14:05,304 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:14:05,304 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:14:05,307 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:14:04" (1/1) ... [2023-11-19 04:14:05,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:14:05,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b095334-b6b2-4ec0-bcc6-1bba4b4eca70/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:14:05,340 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b095334-b6b2-4ec0-bcc6-1bba4b4eca70/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:14:05,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b095334-b6b2-4ec0-bcc6-1bba4b4eca70/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:14:05,390 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_free [2023-11-19 04:14:05,390 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_free [2023-11-19 04:14:05,391 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2023-11-19 04:14:05,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2023-11-19 04:14:05,391 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2023-11-19 04:14:05,391 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2023-11-19 04:14:05,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-19 04:14:05,392 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-19 04:14:05,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-19 04:14:05,392 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 04:14:05,392 INFO L130 BoogieDeclarations]: Found specification of procedure get_gadget_data [2023-11-19 04:14:05,393 INFO L138 BoogieDeclarations]: Found implementation of procedure get_gadget_data [2023-11-19 04:14:05,393 INFO L130 BoogieDeclarations]: Found specification of procedure printer_poll [2023-11-19 04:14:05,393 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_poll [2023-11-19 04:14:05,393 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-11-19 04:14:05,393 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-11-19 04:14:05,393 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_free_request [2023-11-19 04:14:05,394 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_free_request [2023-11-19 04:14:05,395 INFO L130 BoogieDeclarations]: Found specification of procedure printer_reset_interface [2023-11-19 04:14:05,395 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_reset_interface [2023-11-19 04:14:05,395 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2023-11-19 04:14:05,396 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2023-11-19 04:14:05,396 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-19 04:14:05,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-19 04:14:05,396 INFO L130 BoogieDeclarations]: Found specification of procedure printer_soft_reset [2023-11-19 04:14:05,396 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_soft_reset [2023-11-19 04:14:05,397 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_nonpositive_int [2023-11-19 04:14:05,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_nonpositive_int [2023-11-19 04:14:05,397 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_class [2023-11-19 04:14:05,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_class [2023-11-19 04:14:05,398 INFO L130 BoogieDeclarations]: Found specification of procedure list_del_init [2023-11-19 04:14:05,398 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del_init [2023-11-19 04:14:05,398 INFO L130 BoogieDeclarations]: Found specification of procedure set_printer_interface [2023-11-19 04:14:05,398 INFO L138 BoogieDeclarations]: Found implementation of procedure set_printer_interface [2023-11-19 04:14:05,398 INFO L130 BoogieDeclarations]: Found specification of procedure setup_rx_reqs [2023-11-19 04:14:05,398 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_rx_reqs [2023-11-19 04:14:05,398 INFO L130 BoogieDeclarations]: Found specification of procedure class_destroy [2023-11-19 04:14:05,399 INFO L138 BoogieDeclarations]: Found implementation of procedure class_destroy [2023-11-19 04:14:05,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 04:14:05,399 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-11-19 04:14:05,399 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-11-19 04:14:05,399 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-19 04:14:05,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-19 04:14:05,400 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_queue [2023-11-19 04:14:05,400 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_queue [2023-11-19 04:14:05,400 INFO L130 BoogieDeclarations]: Found specification of procedure set_interface [2023-11-19 04:14:05,400 INFO L138 BoogieDeclarations]: Found implementation of procedure set_interface [2023-11-19 04:14:05,400 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup_complete [2023-11-19 04:14:05,400 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup_complete [2023-11-19 04:14:05,400 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2023-11-19 04:14:05,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2023-11-19 04:14:05,401 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-19 04:14:05,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-19 04:14:05,401 INFO L130 BoogieDeclarations]: Found specification of procedure usb_gadget_vbus_draw [2023-11-19 04:14:05,402 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_gadget_vbus_draw [2023-11-19 04:14:05,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 04:14:05,403 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2023-11-19 04:14:05,403 INFO L130 BoogieDeclarations]: Found specification of procedure printer_unbind [2023-11-19 04:14:05,403 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_unbind [2023-11-19 04:14:05,404 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_alloc_notrace [2023-11-19 04:14:05,404 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2023-11-19 04:14:05,404 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2023-11-19 04:14:05,404 INFO L130 BoogieDeclarations]: Found specification of procedure printer_close [2023-11-19 04:14:05,404 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_close [2023-11-19 04:14:05,404 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2023-11-19 04:14:05,404 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2023-11-19 04:14:05,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:14:05,405 INFO L130 BoogieDeclarations]: Found specification of procedure poll_wait [2023-11-19 04:14:05,405 INFO L138 BoogieDeclarations]: Found implementation of procedure poll_wait [2023-11-19 04:14:05,405 INFO L130 BoogieDeclarations]: Found specification of procedure printer_fsync [2023-11-19 04:14:05,405 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_fsync [2023-11-19 04:14:05,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 04:14:05,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 04:14:05,406 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2023-11-19 04:14:05,406 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2023-11-19 04:14:05,406 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2023-11-19 04:14:05,406 INFO L130 BoogieDeclarations]: Found specification of procedure init_utsname [2023-11-19 04:14:05,406 INFO L138 BoogieDeclarations]: Found implementation of procedure init_utsname [2023-11-19 04:14:05,407 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_enable [2023-11-19 04:14:05,407 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_enable [2023-11-19 04:14:05,407 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 04:14:05,407 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_notrace [2023-11-19 04:14:05,407 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_notrace [2023-11-19 04:14:05,408 INFO L130 BoogieDeclarations]: Found specification of procedure printer_open [2023-11-19 04:14:05,408 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_open [2023-11-19 04:14:05,408 INFO L130 BoogieDeclarations]: Found specification of procedure printer_bind [2023-11-19 04:14:05,408 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_bind [2023-11-19 04:14:05,408 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2023-11-19 04:14:05,408 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2023-11-19 04:14:05,408 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2023-11-19 04:14:05,409 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2023-11-19 04:14:05,409 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2023-11-19 04:14:05,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2023-11-19 04:14:05,409 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2023-11-19 04:14:05,409 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2023-11-19 04:14:05,409 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2023-11-19 04:14:05,409 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2023-11-19 04:14:05,410 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2023-11-19 04:14:05,410 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2023-11-19 04:14:05,410 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_autoconfig [2023-11-19 04:14:05,410 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_autoconfig [2023-11-19 04:14:05,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 04:14:05,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-19 04:14:05,411 INFO L130 BoogieDeclarations]: Found specification of procedure trace_kmalloc [2023-11-19 04:14:05,411 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_kmalloc [2023-11-19 04:14:05,411 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2023-11-19 04:14:05,412 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2023-11-19 04:14:05,412 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait [2023-11-19 04:14:05,412 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait [2023-11-19 04:14:05,413 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-19 04:14:05,413 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-19 04:14:05,413 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2023-11-19 04:14:05,413 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2023-11-19 04:14:05,413 INFO L130 BoogieDeclarations]: Found specification of procedure dev_err [2023-11-19 04:14:05,414 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_err [2023-11-19 04:14:05,414 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup [2023-11-19 04:14:05,414 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup [2023-11-19 04:14:05,414 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2023-11-19 04:14:05,414 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2023-11-19 04:14:05,414 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_chrdev_region [2023-11-19 04:14:05,414 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_chrdev_region [2023-11-19 04:14:05,414 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2023-11-19 04:14:05,415 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2023-11-19 04:14:05,415 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2023-11-19 04:14:05,416 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2023-11-19 04:14:05,416 INFO L130 BoogieDeclarations]: Found specification of procedure set_gadget_data [2023-11-19 04:14:05,416 INFO L138 BoogieDeclarations]: Found implementation of procedure set_gadget_data [2023-11-19 04:14:05,416 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_alloc [2023-11-19 04:14:05,416 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_alloc [2023-11-19 04:14:05,417 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-19 04:14:05,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-19 04:14:05,417 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2023-11-19 04:14:05,417 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2023-11-19 04:14:05,417 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_disable [2023-11-19 04:14:05,417 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_disable [2023-11-19 04:14:05,418 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2023-11-19 04:14:05,418 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2023-11-19 04:14:05,418 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_chrdev_region [2023-11-19 04:14:05,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_chrdev_region [2023-11-19 04:14:05,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:14:05,422 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2023-11-19 04:14:05,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2023-11-19 04:14:05,423 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2023-11-19 04:14:05,423 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2023-11-19 04:14:05,424 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-19 04:14:05,424 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2023-11-19 04:14:05,425 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2023-11-19 04:14:05,426 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2023-11-19 04:14:05,426 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2023-11-19 04:14:05,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:14:05,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:14:05,431 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2023-11-19 04:14:05,431 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2023-11-19 04:14:06,053 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:14:06,060 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:14:25,695 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:14:27,564 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:14:27,565 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 04:14:27,581 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:14:27 BoogieIcfgContainer [2023-11-19 04:14:27,581 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:14:27,585 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:14:27,585 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:14:27,589 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:14:27,589 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:14:02" (1/3) ... [2023-11-19 04:14:27,591 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65b47e97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:14:27, skipping insertion in model container [2023-11-19 04:14:27,591 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:14:04" (2/3) ... [2023-11-19 04:14:27,592 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65b47e97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:14:27, skipping insertion in model container [2023-11-19 04:14:27,592 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:14:27" (3/3) ... [2023-11-19 04:14:27,593 INFO L112 eAbstractionObserver]: Analyzing ICFG m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i [2023-11-19 04:14:27,613 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:14:27,614 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 04:14:27,696 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:14:27,703 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;@515d4b63, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:14:27,703 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 04:14:27,716 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) [2023-11-19 04:14:27,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-19 04:14:27,724 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:14:27,725 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:14:27,725 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:14:27,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:14:27,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1137337520, now seen corresponding path program 1 times [2023-11-19 04:14:27,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:14:27,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789748416] [2023-11-19 04:14:27,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:14:27,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:14:29,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:14:29,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:14:29,670 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:14:29,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789748416] [2023-11-19 04:14:29,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789748416] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:14:29,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:14:29,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:14:29,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737547289] [2023-11-19 04:14:29,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:14:29,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:14:29,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:14:29,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:14:29,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:14:29,722 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) [2023-11-19 04:14:31,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:14:33,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:14:33,589 INFO L93 Difference]: Finished difference Result 3011 states and 4536 transitions. [2023-11-19 04:14:33,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:14:33,593 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 [2023-11-19 04:14:33,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:14:33,672 INFO L225 Difference]: With dead ends: 3011 [2023-11-19 04:14:33,672 INFO L226 Difference]: Without dead ends: 1965 [2023-11-19 04:14:33,687 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 [2023-11-19 04:14:33,691 INFO L413 NwaCegarLoop]: 1677 mSDtfsCounter, 1491 mSDsluCounter, 1262 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1491 SdHoareTripleChecker+Valid, 2939 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-11-19 04:14:33,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1491 Valid, 2939 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 334 Invalid, 1 Unknown, 0 Unchecked, 3.6s Time] [2023-11-19 04:14:33,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1965 states. [2023-11-19 04:14:33,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1965 to 1960. [2023-11-19 04:14:33,899 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) [2023-11-19 04:14:33,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1960 states to 1960 states and 2898 transitions. [2023-11-19 04:14:33,922 INFO L78 Accepts]: Start accepts. Automaton has 1960 states and 2898 transitions. Word has length 15 [2023-11-19 04:14:33,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:14:33,923 INFO L495 AbstractCegarLoop]: Abstraction has 1960 states and 2898 transitions. [2023-11-19 04:14:33,923 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) [2023-11-19 04:14:33,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1960 states and 2898 transitions. [2023-11-19 04:14:33,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-19 04:14:33,925 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:14:33,925 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:14:33,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:14:33,926 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:14:33,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:14:33,926 INFO L85 PathProgramCache]: Analyzing trace with hash 896581478, now seen corresponding path program 1 times [2023-11-19 04:14:33,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:14:33,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704270569] [2023-11-19 04:14:33,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:14:33,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:14:34,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:14:35,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:14:35,208 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:14:35,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704270569] [2023-11-19 04:14:35,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704270569] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:14:35,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:14:35,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:14:35,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476926103] [2023-11-19 04:14:35,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:14:35,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:14:35,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:14:35,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:14:35,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:14:35,214 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) [2023-11-19 04:14:37,256 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 [] [2023-11-19 04:14:39,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:14:39,445 INFO L93 Difference]: Finished difference Result 4851 states and 7174 transitions. [2023-11-19 04:14:39,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:14:39,446 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 [2023-11-19 04:14:39,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:14:39,480 INFO L225 Difference]: With dead ends: 4851 [2023-11-19 04:14:39,480 INFO L226 Difference]: Without dead ends: 3891 [2023-11-19 04:14:39,487 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 [2023-11-19 04:14:39,489 INFO L413 NwaCegarLoop]: 2522 mSDtfsCounter, 1485 mSDsluCounter, 1310 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1485 SdHoareTripleChecker+Valid, 3832 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:14:39,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1485 Valid, 3832 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 445 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2023-11-19 04:14:39,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3891 states. [2023-11-19 04:14:39,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3891 to 3882. [2023-11-19 04:14:39,765 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) [2023-11-19 04:14:39,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3882 states to 3882 states and 5743 transitions. [2023-11-19 04:14:39,813 INFO L78 Accepts]: Start accepts. Automaton has 3882 states and 5743 transitions. Word has length 16 [2023-11-19 04:14:39,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:14:39,814 INFO L495 AbstractCegarLoop]: Abstraction has 3882 states and 5743 transitions. [2023-11-19 04:14:39,815 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) [2023-11-19 04:14:39,815 INFO L276 IsEmpty]: Start isEmpty. Operand 3882 states and 5743 transitions. [2023-11-19 04:14:39,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-19 04:14:39,818 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:14:39,819 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] [2023-11-19 04:14:39,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 04:14:39,824 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:14:39,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:14:39,837 INFO L85 PathProgramCache]: Analyzing trace with hash -723666674, now seen corresponding path program 1 times [2023-11-19 04:14:39,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:14:39,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063139924] [2023-11-19 04:14:39,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:14:39,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:14:41,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:14:41,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:14:41,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:14:41,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063139924] [2023-11-19 04:14:41,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063139924] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:14:41,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:14:41,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:14:41,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780057518] [2023-11-19 04:14:41,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:14:41,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:14:41,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:14:41,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:14:41,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:14:41,492 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) [2023-11-19 04:14:43,535 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 [] [2023-11-19 04:14:45,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:14:45,625 INFO L93 Difference]: Finished difference Result 8677 states and 12834 transitions. [2023-11-19 04:14:45,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:14:45,626 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 [2023-11-19 04:14:45,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:14:45,695 INFO L225 Difference]: With dead ends: 8677 [2023-11-19 04:14:45,695 INFO L226 Difference]: Without dead ends: 7704 [2023-11-19 04:14:45,706 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 [2023-11-19 04:14:45,707 INFO L413 NwaCegarLoop]: 2158 mSDtfsCounter, 1476 mSDsluCounter, 1299 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1476 SdHoareTripleChecker+Valid, 3457 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-11-19 04:14:45,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1476 Valid, 3457 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 378 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2023-11-19 04:14:45,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7704 states. [2023-11-19 04:14:46,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7704 to 7683. [2023-11-19 04:14:46,269 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) [2023-11-19 04:14:46,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7683 states to 7683 states and 11375 transitions. [2023-11-19 04:14:46,321 INFO L78 Accepts]: Start accepts. Automaton has 7683 states and 11375 transitions. Word has length 32 [2023-11-19 04:14:46,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:14:46,321 INFO L495 AbstractCegarLoop]: Abstraction has 7683 states and 11375 transitions. [2023-11-19 04:14:46,323 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) [2023-11-19 04:14:46,323 INFO L276 IsEmpty]: Start isEmpty. Operand 7683 states and 11375 transitions. [2023-11-19 04:14:46,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-19 04:14:46,331 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:14:46,331 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] [2023-11-19 04:14:46,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 04:14:46,332 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:14:46,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:14:46,333 INFO L85 PathProgramCache]: Analyzing trace with hash -856706648, now seen corresponding path program 1 times [2023-11-19 04:14:46,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:14:46,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654292828] [2023-11-19 04:14:46,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:14:46,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:14:47,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:14:50,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:14:50,018 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:14:50,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654292828] [2023-11-19 04:14:50,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654292828] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:14:50,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:14:50,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-19 04:14:50,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587987572] [2023-11-19 04:14:50,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:14:50,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 04:14:50,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:14:50,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 04:14:50,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2023-11-19 04:14:50,020 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)