./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 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f22f8d6-25f7-4a95-9e18-11b1f0eda1cd/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f22f8d6-25f7-4a95-9e18-11b1f0eda1cd/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f22f8d6-25f7-4a95-9e18-11b1f0eda1cd/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f22f8d6-25f7-4a95-9e18-11b1f0eda1cd/bin/utaipan-verify-mE87zJ7Ire/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_6f22f8d6-25f7-4a95-9e18-11b1f0eda1cd/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f22f8d6-25f7-4a95-9e18-11b1f0eda1cd/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash cb8f0ebb3c2471fcffc912ab6e7b9ec5c4e0cbee8604050053df01c587aed5a7 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:35:36,444 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:35:36,576 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f22f8d6-25f7-4a95-9e18-11b1f0eda1cd/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 20:35:36,587 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:35:36,588 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:35:36,635 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:35:36,636 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:35:36,636 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:35:36,638 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:35:36,644 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:35:36,644 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:35:36,646 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:35:36,646 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:35:36,648 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:35:36,649 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:35:36,650 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:35:36,650 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:35:36,651 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:35:36,651 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:35:36,652 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:35:36,652 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:35:36,653 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:35:36,655 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:35:36,655 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:35:36,656 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:35:36,657 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:35:36,657 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:35:36,658 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:35:36,658 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:35:36,659 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:35:36,661 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:35:36,663 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:35:36,663 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:35:36,663 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:35:36,664 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:35:36,664 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:35:36,665 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:35:36,665 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:35:36,665 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:35:36,666 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:35:36,666 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:35:36,666 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:35:36,667 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:35:36,667 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:35:36,668 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_6f22f8d6-25f7-4a95-9e18-11b1f0eda1cd/bin/utaipan-verify-mE87zJ7Ire/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f22f8d6-25f7-4a95-9e18-11b1f0eda1cd/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb8f0ebb3c2471fcffc912ab6e7b9ec5c4e0cbee8604050053df01c587aed5a7 [2023-11-23 20:35:37,007 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:35:37,047 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:35:37,050 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:35:37,051 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:35:37,052 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:35:37,053 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f22f8d6-25f7-4a95-9e18-11b1f0eda1cd/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i [2023-11-23 20:35:40,394 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:35:41,065 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:35:41,065 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f22f8d6-25f7-4a95-9e18-11b1f0eda1cd/sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i [2023-11-23 20:35:41,114 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f22f8d6-25f7-4a95-9e18-11b1f0eda1cd/bin/utaipan-verify-mE87zJ7Ire/data/c7194853e/7c33c8c74b8c4f14b072f4174d4cdef0/FLAG4be234cf5 [2023-11-23 20:35:41,129 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f22f8d6-25f7-4a95-9e18-11b1f0eda1cd/bin/utaipan-verify-mE87zJ7Ire/data/c7194853e/7c33c8c74b8c4f14b072f4174d4cdef0 [2023-11-23 20:35:41,132 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:35:41,134 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:35:41,136 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:35:41,136 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:35:41,143 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:35:41,144 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:35:41" (1/1) ... [2023-11-23 20:35:41,145 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@435d1868 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:41, skipping insertion in model container [2023-11-23 20:35:41,145 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:35:41" (1/1) ... [2023-11-23 20:35:41,254 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:35:42,464 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_6f22f8d6-25f7-4a95-9e18-11b1f0eda1cd/sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i[158757,158770] [2023-11-23 20:35:42,498 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:35:42,537 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:35:42,659 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("bt %2,%1\n\tsbb %0,%0": "=r" (oldbit): "m" (*((unsigned long *)addr)), "Ir" (nr)); [2775-2776] [2023-11-23 20:35:42,662 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movb %%gs:%P1,%0": "=q" (pfo_ret__): "p" (& current_task)); [2794] [2023-11-23 20:35:42,663 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movw %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& current_task)); [2797] [2023-11-23 20:35:42,663 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movl %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& current_task)); [2800] [2023-11-23 20:35:42,664 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movq %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& current_task)); [2803] [2023-11-23 20:35:42,784 WARN L75 lationResultReporter]: Unsoundness Warning: ignored call to __builtin_prefetch C: __builtin_prefetch((void const *)ep->ep_list.next) [3806] [2023-11-23 20:35:42,786 WARN L75 lationResultReporter]: Unsoundness Warning: ignored call to __builtin_prefetch C: __builtin_prefetch((void const *)ep->ep_list.next) [3828] [2023-11-23 20:35:42,908 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_6f22f8d6-25f7-4a95-9e18-11b1f0eda1cd/sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i[158757,158770] [2023-11-23 20:35:42,931 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:35:43,026 WARN L675 CHandler]: The function strrchr is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:35:43,026 WARN L675 CHandler]: The function kmem_cache_alloc_notrace is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:35:43,027 WARN L675 CHandler]: The function __bad_percpu_size is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:35:43,036 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:35:43,036 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:43 WrapperNode [2023-11-23 20:35:43,037 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:35:43,038 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:35:43,039 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:35:43,039 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:35:43,048 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:43" (1/1) ... [2023-11-23 20:35:43,149 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:43" (1/1) ... [2023-11-23 20:35:43,342 INFO L138 Inliner]: procedures = 191, calls = 1310, calls flagged for inlining = 86, calls inlined = 86, statements flattened = 3618 [2023-11-23 20:35:43,343 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:35:43,344 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:35:43,344 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:35:43,344 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:35:43,355 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:43" (1/1) ... [2023-11-23 20:35:43,356 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:43" (1/1) ... [2023-11-23 20:35:43,383 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:43" (1/1) ... [2023-11-23 20:35:43,384 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:43" (1/1) ... [2023-11-23 20:35:43,504 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:43" (1/1) ... [2023-11-23 20:35:43,527 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:43" (1/1) ... [2023-11-23 20:35:43,550 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:43" (1/1) ... [2023-11-23 20:35:43,573 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:43" (1/1) ... [2023-11-23 20:35:43,620 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:35:43,623 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:35:43,624 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:35:43,624 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:35:43,626 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:43" (1/1) ... [2023-11-23 20:35:43,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:35:43,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f22f8d6-25f7-4a95-9e18-11b1f0eda1cd/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:35:43,666 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f22f8d6-25f7-4a95-9e18-11b1f0eda1cd/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:35:43,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f22f8d6-25f7-4a95-9e18-11b1f0eda1cd/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:35:43,716 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_free [2023-11-23 20:35:43,717 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_free [2023-11-23 20:35:43,717 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2023-11-23 20:35:43,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2023-11-23 20:35:43,717 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2023-11-23 20:35:43,717 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2023-11-23 20:35:43,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-23 20:35:43,718 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-23 20:35:43,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-23 20:35:43,719 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 20:35:43,719 INFO L130 BoogieDeclarations]: Found specification of procedure get_gadget_data [2023-11-23 20:35:43,813 INFO L138 BoogieDeclarations]: Found implementation of procedure get_gadget_data [2023-11-23 20:35:43,813 INFO L130 BoogieDeclarations]: Found specification of procedure printer_poll [2023-11-23 20:35:43,813 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_poll [2023-11-23 20:35:43,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-11-23 20:35:43,813 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-11-23 20:35:43,813 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_free_request [2023-11-23 20:35:43,813 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_free_request [2023-11-23 20:35:43,813 INFO L130 BoogieDeclarations]: Found specification of procedure printer_reset_interface [2023-11-23 20:35:43,814 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_reset_interface [2023-11-23 20:35:43,814 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2023-11-23 20:35:43,814 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2023-11-23 20:35:43,814 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-23 20:35:43,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-23 20:35:43,814 INFO L130 BoogieDeclarations]: Found specification of procedure printer_soft_reset [2023-11-23 20:35:43,814 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_soft_reset [2023-11-23 20:35:43,814 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_nonpositive_int [2023-11-23 20:35:43,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_nonpositive_int [2023-11-23 20:35:43,814 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_class [2023-11-23 20:35:43,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_class [2023-11-23 20:35:43,815 INFO L130 BoogieDeclarations]: Found specification of procedure list_del_init [2023-11-23 20:35:43,815 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del_init [2023-11-23 20:35:43,815 INFO L130 BoogieDeclarations]: Found specification of procedure set_printer_interface [2023-11-23 20:35:43,815 INFO L138 BoogieDeclarations]: Found implementation of procedure set_printer_interface [2023-11-23 20:35:43,815 INFO L130 BoogieDeclarations]: Found specification of procedure setup_rx_reqs [2023-11-23 20:35:43,815 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_rx_reqs [2023-11-23 20:35:43,815 INFO L130 BoogieDeclarations]: Found specification of procedure class_destroy [2023-11-23 20:35:43,815 INFO L138 BoogieDeclarations]: Found implementation of procedure class_destroy [2023-11-23 20:35:43,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 20:35:43,816 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-11-23 20:35:43,816 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-11-23 20:35:43,816 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-23 20:35:43,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-23 20:35:43,816 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_queue [2023-11-23 20:35:43,816 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_queue [2023-11-23 20:35:43,816 INFO L130 BoogieDeclarations]: Found specification of procedure set_interface [2023-11-23 20:35:43,816 INFO L138 BoogieDeclarations]: Found implementation of procedure set_interface [2023-11-23 20:35:43,816 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup_complete [2023-11-23 20:35:43,817 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup_complete [2023-11-23 20:35:43,817 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2023-11-23 20:35:43,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2023-11-23 20:35:43,817 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-23 20:35:43,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-23 20:35:43,817 INFO L130 BoogieDeclarations]: Found specification of procedure usb_gadget_vbus_draw [2023-11-23 20:35:43,817 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_gadget_vbus_draw [2023-11-23 20:35:43,817 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 20:35:43,817 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2023-11-23 20:35:43,817 INFO L130 BoogieDeclarations]: Found specification of procedure printer_unbind [2023-11-23 20:35:43,818 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_unbind [2023-11-23 20:35:43,818 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_alloc_notrace [2023-11-23 20:35:43,818 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2023-11-23 20:35:43,818 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2023-11-23 20:35:43,818 INFO L130 BoogieDeclarations]: Found specification of procedure printer_close [2023-11-23 20:35:43,818 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_close [2023-11-23 20:35:43,818 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2023-11-23 20:35:43,818 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2023-11-23 20:35:43,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:35:43,818 INFO L130 BoogieDeclarations]: Found specification of procedure poll_wait [2023-11-23 20:35:43,819 INFO L138 BoogieDeclarations]: Found implementation of procedure poll_wait [2023-11-23 20:35:43,819 INFO L130 BoogieDeclarations]: Found specification of procedure printer_fsync [2023-11-23 20:35:43,819 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_fsync [2023-11-23 20:35:43,819 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 20:35:43,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 20:35:43,819 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2023-11-23 20:35:43,819 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2023-11-23 20:35:43,819 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2023-11-23 20:35:43,819 INFO L130 BoogieDeclarations]: Found specification of procedure init_utsname [2023-11-23 20:35:43,819 INFO L138 BoogieDeclarations]: Found implementation of procedure init_utsname [2023-11-23 20:35:43,820 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_enable [2023-11-23 20:35:43,820 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_enable [2023-11-23 20:35:43,820 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 20:35:43,820 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_notrace [2023-11-23 20:35:43,820 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_notrace [2023-11-23 20:35:43,820 INFO L130 BoogieDeclarations]: Found specification of procedure printer_open [2023-11-23 20:35:43,820 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_open [2023-11-23 20:35:43,820 INFO L130 BoogieDeclarations]: Found specification of procedure printer_bind [2023-11-23 20:35:43,820 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_bind [2023-11-23 20:35:43,820 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2023-11-23 20:35:43,821 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2023-11-23 20:35:43,821 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2023-11-23 20:35:43,821 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2023-11-23 20:35:43,821 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2023-11-23 20:35:43,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2023-11-23 20:35:43,821 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2023-11-23 20:35:43,821 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2023-11-23 20:35:43,821 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2023-11-23 20:35:43,821 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2023-11-23 20:35:43,821 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2023-11-23 20:35:43,822 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2023-11-23 20:35:43,822 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_autoconfig [2023-11-23 20:35:43,822 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_autoconfig [2023-11-23 20:35:43,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 20:35:43,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 20:35:43,822 INFO L130 BoogieDeclarations]: Found specification of procedure trace_kmalloc [2023-11-23 20:35:43,822 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_kmalloc [2023-11-23 20:35:43,822 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2023-11-23 20:35:43,822 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2023-11-23 20:35:43,822 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait [2023-11-23 20:35:43,823 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait [2023-11-23 20:35:43,827 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-23 20:35:43,827 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-23 20:35:43,827 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2023-11-23 20:35:43,827 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2023-11-23 20:35:43,828 INFO L130 BoogieDeclarations]: Found specification of procedure dev_err [2023-11-23 20:35:43,828 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_err [2023-11-23 20:35:43,828 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup [2023-11-23 20:35:43,828 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup [2023-11-23 20:35:43,828 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2023-11-23 20:35:43,828 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2023-11-23 20:35:43,829 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_chrdev_region [2023-11-23 20:35:43,829 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_chrdev_region [2023-11-23 20:35:43,829 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2023-11-23 20:35:43,830 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2023-11-23 20:35:43,830 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2023-11-23 20:35:43,830 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2023-11-23 20:35:43,830 INFO L130 BoogieDeclarations]: Found specification of procedure set_gadget_data [2023-11-23 20:35:43,831 INFO L138 BoogieDeclarations]: Found implementation of procedure set_gadget_data [2023-11-23 20:35:43,831 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_alloc [2023-11-23 20:35:43,831 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_alloc [2023-11-23 20:35:43,831 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-23 20:35:43,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-23 20:35:43,832 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2023-11-23 20:35:43,832 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2023-11-23 20:35:43,832 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_disable [2023-11-23 20:35:43,832 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_disable [2023-11-23 20:35:43,832 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2023-11-23 20:35:43,833 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2023-11-23 20:35:43,834 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_chrdev_region [2023-11-23 20:35:43,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_chrdev_region [2023-11-23 20:35:43,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:35:43,839 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2023-11-23 20:35:43,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2023-11-23 20:35:43,840 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2023-11-23 20:35:43,840 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2023-11-23 20:35:43,842 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-23 20:35:43,842 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2023-11-23 20:35:43,842 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2023-11-23 20:35:43,848 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2023-11-23 20:35:43,848 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2023-11-23 20:35:43,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:35:43,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:35:43,848 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2023-11-23 20:35:43,849 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2023-11-23 20:35:44,528 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:35:44,535 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:35:51,617 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:35:53,219 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:35:53,220 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 20:35:53,222 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:35:53 BoogieIcfgContainer [2023-11-23 20:35:53,222 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:35:53,226 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:35:53,226 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:35:53,229 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:35:53,229 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:35:41" (1/3) ... [2023-11-23 20:35:53,231 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@345e81e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:35:53, skipping insertion in model container [2023-11-23 20:35:53,231 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:43" (2/3) ... [2023-11-23 20:35:53,232 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@345e81e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:35:53, skipping insertion in model container [2023-11-23 20:35:53,232 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:35:53" (3/3) ... [2023-11-23 20:35:53,234 INFO L112 eAbstractionObserver]: Analyzing ICFG m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i [2023-11-23 20:35:53,255 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:35:53,256 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 20:35:53,362 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:35:53,371 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;@34618948, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:35:53,371 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 20:35:53,383 INFO L276 IsEmpty]: Start isEmpty. Operand has 1049 states, 622 states have (on average 1.3569131832797428) internal successors, (844), 662 states have internal predecessors, (844), 358 states have call successors, (358), 67 states have call predecessors, (358), 67 states have return successors, (358), 355 states have call predecessors, (358), 358 states have call successors, (358) [2023-11-23 20:35:53,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-23 20:35:53,393 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:53,394 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:35:53,395 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:53,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:53,403 INFO L85 PathProgramCache]: Analyzing trace with hash -566795227, now seen corresponding path program 1 times [2023-11-23 20:35:53,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:53,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951651031] [2023-11-23 20:35:53,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:53,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:55,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:55,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:35:55,976 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:55,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951651031] [2023-11-23 20:35:55,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951651031] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:55,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:35:55,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:35:55,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356662810] [2023-11-23 20:35:55,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:55,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:35:55,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:56,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:35:56,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:35:56,035 INFO L87 Difference]: Start difference. First operand has 1049 states, 622 states have (on average 1.3569131832797428) internal successors, (844), 662 states have internal predecessors, (844), 358 states have call successors, (358), 67 states have call predecessors, (358), 67 states have return successors, (358), 355 states have call predecessors, (358), 358 states have call successors, (358) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 20:35:58,123 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 [] [2023-11-23 20:36:00,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:00,196 INFO L93 Difference]: Finished difference Result 3011 states and 4536 transitions. [2023-11-23 20:36:00,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:36:00,198 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2023-11-23 20:36:00,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:00,245 INFO L225 Difference]: With dead ends: 3011 [2023-11-23 20:36:00,246 INFO L226 Difference]: Without dead ends: 1965 [2023-11-23 20:36:00,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:36:00,265 INFO L413 NwaCegarLoop]: 1670 mSDtfsCounter, 1491 mSDsluCounter, 1262 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1491 SdHoareTripleChecker+Valid, 2932 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:00,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1491 Valid, 2932 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 334 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2023-11-23 20:36:00,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1965 states. [2023-11-23 20:36:00,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1965 to 1960. [2023-11-23 20:36:00,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1960 states, 1164 states have (on average 1.3445017182130585) internal successors, (1565), 1222 states have internal predecessors, (1565), 671 states have call successors, (671), 126 states have call predecessors, (671), 124 states have return successors, (662), 655 states have call predecessors, (662), 662 states have call successors, (662) [2023-11-23 20:36:00,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1960 states to 1960 states and 2898 transitions. [2023-11-23 20:36:00,563 INFO L78 Accepts]: Start accepts. Automaton has 1960 states and 2898 transitions. Word has length 15 [2023-11-23 20:36:00,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:00,563 INFO L495 AbstractCegarLoop]: Abstraction has 1960 states and 2898 transitions. [2023-11-23 20:36:00,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 20:36:00,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1960 states and 2898 transitions. [2023-11-23 20:36:00,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-23 20:36:00,566 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:00,566 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:00,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 20:36:00,566 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:00,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:00,567 INFO L85 PathProgramCache]: Analyzing trace with hash -391926127, now seen corresponding path program 1 times [2023-11-23 20:36:00,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:00,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454393072] [2023-11-23 20:36:00,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:00,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:01,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:02,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:36:02,241 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:02,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454393072] [2023-11-23 20:36:02,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454393072] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:02,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:02,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:36:02,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907244813] [2023-11-23 20:36:02,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:02,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:36:02,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:02,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:36:02,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:36:02,247 INFO L87 Difference]: Start difference. First operand 1960 states and 2898 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 20:36:04,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 20:36:06,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:06,748 INFO L93 Difference]: Finished difference Result 4851 states and 7174 transitions. [2023-11-23 20:36:06,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:36:06,749 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2023-11-23 20:36:06,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:06,790 INFO L225 Difference]: With dead ends: 4851 [2023-11-23 20:36:06,791 INFO L226 Difference]: Without dead ends: 3891 [2023-11-23 20:36:06,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:36:06,806 INFO L413 NwaCegarLoop]: 2565 mSDtfsCounter, 1485 mSDsluCounter, 1310 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1485 SdHoareTripleChecker+Valid, 3875 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:06,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1485 Valid, 3875 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 440 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2023-11-23 20:36:06,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3891 states. [2023-11-23 20:36:07,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3891 to 3882. [2023-11-23 20:36:07,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3882 states, 2308 states have (on average 1.3444540727902947) internal successors, (3103), 2418 states have internal predecessors, (3103), 1326 states have call successors, (1326), 251 states have call predecessors, (1326), 247 states have return successors, (1314), 1300 states have call predecessors, (1314), 1314 states have call successors, (1314) [2023-11-23 20:36:07,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3882 states to 3882 states and 5743 transitions. [2023-11-23 20:36:07,082 INFO L78 Accepts]: Start accepts. Automaton has 3882 states and 5743 transitions. Word has length 16 [2023-11-23 20:36:07,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:07,082 INFO L495 AbstractCegarLoop]: Abstraction has 3882 states and 5743 transitions. [2023-11-23 20:36:07,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 20:36:07,083 INFO L276 IsEmpty]: Start isEmpty. Operand 3882 states and 5743 transitions. [2023-11-23 20:36:07,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-23 20:36:07,090 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:07,090 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:07,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 20:36:07,090 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:07,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:07,100 INFO L85 PathProgramCache]: Analyzing trace with hash 653799068, now seen corresponding path program 1 times [2023-11-23 20:36:07,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:07,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822908566] [2023-11-23 20:36:07,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:07,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:08,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:08,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:36:08,545 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:08,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822908566] [2023-11-23 20:36:08,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822908566] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:08,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:08,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:36:08,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523928468] [2023-11-23 20:36:08,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:08,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:36:08,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:08,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:36:08,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:36:08,549 INFO L87 Difference]: Start difference. First operand 3882 states and 5743 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 20:36:10,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 20:36:12,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:12,843 INFO L93 Difference]: Finished difference Result 8677 states and 12834 transitions. [2023-11-23 20:36:12,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:36:12,933 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2023-11-23 20:36:12,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:13,003 INFO L225 Difference]: With dead ends: 8677 [2023-11-23 20:36:13,003 INFO L226 Difference]: Without dead ends: 7704 [2023-11-23 20:36:13,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:36:13,019 INFO L413 NwaCegarLoop]: 2095 mSDtfsCounter, 1476 mSDsluCounter, 1299 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1476 SdHoareTripleChecker+Valid, 3394 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:13,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1476 Valid, 3394 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 368 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2023-11-23 20:36:13,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7704 states. [2023-11-23 20:36:13,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7704 to 7683. [2023-11-23 20:36:13,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7683 states, 4568 states have (on average 1.3447898423817863) internal successors, (6143), 4784 states have internal predecessors, (6143), 2623 states have call successors, (2623), 497 states have call predecessors, (2623), 491 states have return successors, (2609), 2577 states have call predecessors, (2609), 2609 states have call successors, (2609) [2023-11-23 20:36:13,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7683 states to 7683 states and 11375 transitions. [2023-11-23 20:36:13,627 INFO L78 Accepts]: Start accepts. Automaton has 7683 states and 11375 transitions. Word has length 32 [2023-11-23 20:36:13,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:13,627 INFO L495 AbstractCegarLoop]: Abstraction has 7683 states and 11375 transitions. [2023-11-23 20:36:13,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 20:36:13,628 INFO L276 IsEmpty]: Start isEmpty. Operand 7683 states and 11375 transitions. [2023-11-23 20:36:13,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-23 20:36:13,636 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:13,636 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:13,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 20:36:13,637 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:13,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:13,637 INFO L85 PathProgramCache]: Analyzing trace with hash -322261094, now seen corresponding path program 1 times [2023-11-23 20:36:13,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:13,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941352375] [2023-11-23 20:36:13,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:13,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:14,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:17,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:36:17,392 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:17,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941352375] [2023-11-23 20:36:17,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941352375] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:17,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:17,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-23 20:36:17,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914379923] [2023-11-23 20:36:17,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:17,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 20:36:17,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:17,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 20:36:17,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2023-11-23 20:36:17,394 INFO L87 Difference]: Start difference. First operand 7683 states and 11375 transitions. Second operand has 12 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-23 20:36:19,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 20:36:21,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 20:36:23,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 20:36:25,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 20:36:27,628 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []