./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 527bcce2 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_b51d62c1-0383-47a9-93d5-68848ecdef09/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51d62c1-0383-47a9-93d5-68848ecdef09/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51d62c1-0383-47a9-93d5-68848ecdef09/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51d62c1-0383-47a9-93d5-68848ecdef09/bin/utaipan-verify-QoSU8krkJ5/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_b51d62c1-0383-47a9-93d5-68848ecdef09/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51d62c1-0383-47a9-93d5-68848ecdef09/bin/utaipan-verify-QoSU8krkJ5 --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-527bcce [2023-11-21 18:57:08,922 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 18:57:09,013 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51d62c1-0383-47a9-93d5-68848ecdef09/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-21 18:57:09,019 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 18:57:09,020 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 18:57:09,046 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 18:57:09,047 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 18:57:09,047 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 18:57:09,048 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 18:57:09,049 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 18:57:09,049 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 18:57:09,050 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 18:57:09,051 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 18:57:09,051 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 18:57:09,052 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 18:57:09,052 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 18:57:09,053 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 18:57:09,053 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 18:57:09,054 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 18:57:09,055 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 18:57:09,055 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 18:57:09,056 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 18:57:09,057 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 18:57:09,057 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 18:57:09,058 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 18:57:09,058 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 18:57:09,059 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 18:57:09,059 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 18:57:09,060 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 18:57:09,060 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 18:57:09,061 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 18:57:09,066 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 18:57:09,066 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 18:57:09,067 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 18:57:09,067 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 18:57:09,068 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 18:57:09,068 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 18:57:09,068 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 18:57:09,069 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 18:57:09,069 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 18:57:09,070 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 18:57:09,070 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 18:57:09,071 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 18:57:09,071 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 18:57:09,071 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51d62c1-0383-47a9-93d5-68848ecdef09/bin/utaipan-verify-QoSU8krkJ5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51d62c1-0383-47a9-93d5-68848ecdef09/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb8f0ebb3c2471fcffc912ab6e7b9ec5c4e0cbee8604050053df01c587aed5a7 [2023-11-21 18:57:09,379 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 18:57:09,414 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 18:57:09,417 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 18:57:09,418 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 18:57:09,419 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 18:57:09,422 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51d62c1-0383-47a9-93d5-68848ecdef09/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i [2023-11-21 18:57:12,814 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 18:57:13,553 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 18:57:13,554 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51d62c1-0383-47a9-93d5-68848ecdef09/sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i [2023-11-21 18:57:13,608 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51d62c1-0383-47a9-93d5-68848ecdef09/bin/utaipan-verify-QoSU8krkJ5/data/270f52779/75f224ba322c4f6ca902375526706e80/FLAG400aadc48 [2023-11-21 18:57:13,634 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51d62c1-0383-47a9-93d5-68848ecdef09/bin/utaipan-verify-QoSU8krkJ5/data/270f52779/75f224ba322c4f6ca902375526706e80 [2023-11-21 18:57:13,644 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 18:57:13,646 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 18:57:13,650 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 18:57:13,650 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 18:57:13,656 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 18:57:13,658 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 06:57:13" (1/1) ... [2023-11-21 18:57:13,659 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f656b66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:57:13, skipping insertion in model container [2023-11-21 18:57:13,659 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 06:57:13" (1/1) ... [2023-11-21 18:57:13,810 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 18:57:15,644 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_b51d62c1-0383-47a9-93d5-68848ecdef09/sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i[158757,158770] [2023-11-21 18:57:15,714 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 18:57:15,793 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 18:57:15,887 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] [2023-11-21 18:57:15,890 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movb %%gs:%P1,%0": "=q" (pfo_ret__): "p" (& current_task)); [2794] [2023-11-21 18:57:15,891 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movw %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& current_task)); [2797] [2023-11-21 18:57:15,892 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movl %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& current_task)); [2800] [2023-11-21 18:57:15,893 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movq %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& current_task)); [2803] [2023-11-21 18:57:15,985 WARN L75 lationResultReporter]: Unsoundness Warning: ignored call to __builtin_prefetch C: __builtin_prefetch((void const *)ep->ep_list.next) [3806] [2023-11-21 18:57:15,987 WARN L75 lationResultReporter]: Unsoundness Warning: ignored call to __builtin_prefetch C: __builtin_prefetch((void const *)ep->ep_list.next) [3828] [2023-11-21 18:57:16,116 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_b51d62c1-0383-47a9-93d5-68848ecdef09/sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i[158757,158770] [2023-11-21 18:57:16,139 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 18:57:16,235 WARN L675 CHandler]: The function strrchr is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 18:57:16,235 WARN L675 CHandler]: The function kmem_cache_alloc_notrace is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 18:57:16,236 WARN L675 CHandler]: The function __bad_percpu_size is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 18:57:16,245 INFO L206 MainTranslator]: Completed translation [2023-11-21 18:57:16,246 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:57:16 WrapperNode [2023-11-21 18:57:16,247 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 18:57:16,248 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 18:57:16,249 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 18:57:16,249 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 18:57:16,259 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:57:16" (1/1) ... [2023-11-21 18:57:16,421 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:57:16" (1/1) ... [2023-11-21 18:57:16,690 INFO L138 Inliner]: procedures = 191, calls = 1310, calls flagged for inlining = 86, calls inlined = 86, statements flattened = 3618 [2023-11-21 18:57:16,691 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 18:57:16,692 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 18:57:16,692 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 18:57:16,693 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 18:57:16,705 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:57:16" (1/1) ... [2023-11-21 18:57:16,706 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:57:16" (1/1) ... [2023-11-21 18:57:16,760 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:57:16" (1/1) ... [2023-11-21 18:57:16,761 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:57:16" (1/1) ... [2023-11-21 18:57:16,901 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:57:16" (1/1) ... [2023-11-21 18:57:16,925 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:57:16" (1/1) ... [2023-11-21 18:57:16,958 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:57:16" (1/1) ... [2023-11-21 18:57:16,978 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:57:16" (1/1) ... [2023-11-21 18:57:17,017 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 18:57:17,018 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 18:57:17,019 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 18:57:17,019 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 18:57:17,020 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:57:16" (1/1) ... [2023-11-21 18:57:17,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 18:57:17,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51d62c1-0383-47a9-93d5-68848ecdef09/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:57:17,057 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51d62c1-0383-47a9-93d5-68848ecdef09/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 18:57:17,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51d62c1-0383-47a9-93d5-68848ecdef09/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 18:57:17,123 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_free [2023-11-21 18:57:17,123 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_free [2023-11-21 18:57:17,124 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2023-11-21 18:57:17,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2023-11-21 18:57:17,124 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2023-11-21 18:57:17,124 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2023-11-21 18:57:17,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-21 18:57:17,125 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-21 18:57:17,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-21 18:57:17,125 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 18:57:17,125 INFO L130 BoogieDeclarations]: Found specification of procedure get_gadget_data [2023-11-21 18:57:17,126 INFO L138 BoogieDeclarations]: Found implementation of procedure get_gadget_data [2023-11-21 18:57:17,126 INFO L130 BoogieDeclarations]: Found specification of procedure printer_poll [2023-11-21 18:57:17,126 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_poll [2023-11-21 18:57:17,126 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-11-21 18:57:17,126 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-11-21 18:57:17,127 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_free_request [2023-11-21 18:57:17,127 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_free_request [2023-11-21 18:57:17,127 INFO L130 BoogieDeclarations]: Found specification of procedure printer_reset_interface [2023-11-21 18:57:17,127 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_reset_interface [2023-11-21 18:57:17,127 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2023-11-21 18:57:17,128 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2023-11-21 18:57:17,128 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-21 18:57:17,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-21 18:57:17,128 INFO L130 BoogieDeclarations]: Found specification of procedure printer_soft_reset [2023-11-21 18:57:17,128 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_soft_reset [2023-11-21 18:57:17,129 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_nonpositive_int [2023-11-21 18:57:17,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_nonpositive_int [2023-11-21 18:57:17,129 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_class [2023-11-21 18:57:17,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_class [2023-11-21 18:57:17,129 INFO L130 BoogieDeclarations]: Found specification of procedure list_del_init [2023-11-21 18:57:17,130 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del_init [2023-11-21 18:57:17,130 INFO L130 BoogieDeclarations]: Found specification of procedure set_printer_interface [2023-11-21 18:57:17,130 INFO L138 BoogieDeclarations]: Found implementation of procedure set_printer_interface [2023-11-21 18:57:17,130 INFO L130 BoogieDeclarations]: Found specification of procedure setup_rx_reqs [2023-11-21 18:57:17,130 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_rx_reqs [2023-11-21 18:57:17,130 INFO L130 BoogieDeclarations]: Found specification of procedure class_destroy [2023-11-21 18:57:17,131 INFO L138 BoogieDeclarations]: Found implementation of procedure class_destroy [2023-11-21 18:57:17,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 18:57:17,131 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-11-21 18:57:17,131 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-11-21 18:57:17,131 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-21 18:57:17,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-21 18:57:17,132 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_queue [2023-11-21 18:57:17,132 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_queue [2023-11-21 18:57:17,132 INFO L130 BoogieDeclarations]: Found specification of procedure set_interface [2023-11-21 18:57:17,132 INFO L138 BoogieDeclarations]: Found implementation of procedure set_interface [2023-11-21 18:57:17,132 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup_complete [2023-11-21 18:57:17,133 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup_complete [2023-11-21 18:57:17,133 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2023-11-21 18:57:17,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2023-11-21 18:57:17,133 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-21 18:57:17,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-21 18:57:17,134 INFO L130 BoogieDeclarations]: Found specification of procedure usb_gadget_vbus_draw [2023-11-21 18:57:17,134 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_gadget_vbus_draw [2023-11-21 18:57:17,134 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 18:57:17,134 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2023-11-21 18:57:17,134 INFO L130 BoogieDeclarations]: Found specification of procedure printer_unbind [2023-11-21 18:57:17,134 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_unbind [2023-11-21 18:57:17,135 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_alloc_notrace [2023-11-21 18:57:17,135 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2023-11-21 18:57:17,135 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2023-11-21 18:57:17,135 INFO L130 BoogieDeclarations]: Found specification of procedure printer_close [2023-11-21 18:57:17,135 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_close [2023-11-21 18:57:17,136 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2023-11-21 18:57:17,136 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2023-11-21 18:57:17,136 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 18:57:17,136 INFO L130 BoogieDeclarations]: Found specification of procedure poll_wait [2023-11-21 18:57:17,136 INFO L138 BoogieDeclarations]: Found implementation of procedure poll_wait [2023-11-21 18:57:17,136 INFO L130 BoogieDeclarations]: Found specification of procedure printer_fsync [2023-11-21 18:57:17,137 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_fsync [2023-11-21 18:57:17,137 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 18:57:17,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-21 18:57:17,137 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2023-11-21 18:57:17,137 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2023-11-21 18:57:17,137 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2023-11-21 18:57:17,138 INFO L130 BoogieDeclarations]: Found specification of procedure init_utsname [2023-11-21 18:57:17,138 INFO L138 BoogieDeclarations]: Found implementation of procedure init_utsname [2023-11-21 18:57:17,138 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_enable [2023-11-21 18:57:17,138 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_enable [2023-11-21 18:57:17,138 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-21 18:57:17,139 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_notrace [2023-11-21 18:57:17,139 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_notrace [2023-11-21 18:57:17,139 INFO L130 BoogieDeclarations]: Found specification of procedure printer_open [2023-11-21 18:57:17,139 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_open [2023-11-21 18:57:17,139 INFO L130 BoogieDeclarations]: Found specification of procedure printer_bind [2023-11-21 18:57:17,139 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_bind [2023-11-21 18:57:17,140 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2023-11-21 18:57:17,140 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2023-11-21 18:57:17,140 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2023-11-21 18:57:17,140 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2023-11-21 18:57:17,140 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2023-11-21 18:57:17,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2023-11-21 18:57:17,140 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2023-11-21 18:57:17,141 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2023-11-21 18:57:17,141 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2023-11-21 18:57:17,141 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2023-11-21 18:57:17,141 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2023-11-21 18:57:17,141 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2023-11-21 18:57:17,142 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_autoconfig [2023-11-21 18:57:17,142 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_autoconfig [2023-11-21 18:57:17,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 18:57:17,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-21 18:57:17,142 INFO L130 BoogieDeclarations]: Found specification of procedure trace_kmalloc [2023-11-21 18:57:17,142 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_kmalloc [2023-11-21 18:57:17,142 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2023-11-21 18:57:17,143 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2023-11-21 18:57:17,143 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait [2023-11-21 18:57:17,143 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait [2023-11-21 18:57:17,143 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-21 18:57:17,143 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-21 18:57:17,144 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2023-11-21 18:57:17,144 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2023-11-21 18:57:17,144 INFO L130 BoogieDeclarations]: Found specification of procedure dev_err [2023-11-21 18:57:17,144 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_err [2023-11-21 18:57:17,144 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup [2023-11-21 18:57:17,144 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup [2023-11-21 18:57:17,145 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2023-11-21 18:57:17,145 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2023-11-21 18:57:17,145 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_chrdev_region [2023-11-21 18:57:17,145 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_chrdev_region [2023-11-21 18:57:17,145 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2023-11-21 18:57:17,145 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2023-11-21 18:57:17,146 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2023-11-21 18:57:17,146 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2023-11-21 18:57:17,146 INFO L130 BoogieDeclarations]: Found specification of procedure set_gadget_data [2023-11-21 18:57:17,146 INFO L138 BoogieDeclarations]: Found implementation of procedure set_gadget_data [2023-11-21 18:57:17,146 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_alloc [2023-11-21 18:57:17,146 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_alloc [2023-11-21 18:57:17,146 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-21 18:57:17,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-21 18:57:17,147 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2023-11-21 18:57:17,147 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2023-11-21 18:57:17,147 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_disable [2023-11-21 18:57:17,147 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_disable [2023-11-21 18:57:17,148 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2023-11-21 18:57:17,148 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2023-11-21 18:57:17,148 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_chrdev_region [2023-11-21 18:57:17,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_chrdev_region [2023-11-21 18:57:17,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 18:57:17,148 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2023-11-21 18:57:17,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2023-11-21 18:57:17,149 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2023-11-21 18:57:17,149 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2023-11-21 18:57:17,149 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-21 18:57:17,149 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2023-11-21 18:57:17,149 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2023-11-21 18:57:17,150 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2023-11-21 18:57:17,150 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2023-11-21 18:57:17,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 18:57:17,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 18:57:17,150 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2023-11-21 18:57:17,150 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2023-11-21 18:57:17,953 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 18:57:17,959 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 18:57:38,238 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 18:57:39,888 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 18:57:39,889 INFO L308 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-21 18:57:39,891 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 06:57:39 BoogieIcfgContainer [2023-11-21 18:57:39,892 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 18:57:39,896 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 18:57:39,897 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 18:57:39,900 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 18:57:39,900 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 06:57:13" (1/3) ... [2023-11-21 18:57:39,902 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f68a031 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 06:57:39, skipping insertion in model container [2023-11-21 18:57:39,903 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:57:16" (2/3) ... [2023-11-21 18:57:39,904 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f68a031 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 06:57:39, skipping insertion in model container [2023-11-21 18:57:39,904 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 06:57:39" (3/3) ... [2023-11-21 18:57:39,905 INFO L112 eAbstractionObserver]: Analyzing ICFG m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i [2023-11-21 18:57:39,928 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 18:57:39,928 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 18:57:40,009 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 18:57:40,017 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;@85bc06e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 18:57:40,017 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 18:57:40,028 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) [2023-11-21 18:57:40,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-21 18:57:40,038 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:57:40,038 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:57:40,039 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:57:40,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:57:40,045 INFO L85 PathProgramCache]: Analyzing trace with hash -566795227, now seen corresponding path program 1 times [2023-11-21 18:57:40,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:57:40,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641777027] [2023-11-21 18:57:40,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:57:40,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:57:41,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:57:41,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:57:41,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:57:41,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641777027] [2023-11-21 18:57:41,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641777027] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:57:41,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:57:41,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 18:57:41,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639589320] [2023-11-21 18:57:41,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:57:41,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 18:57:41,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:57:42,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 18:57:42,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 18:57:42,038 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) [2023-11-21 18:57:44,112 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 [] [2023-11-21 18:57:46,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:57:46,174 INFO L93 Difference]: Finished difference Result 3011 states and 4536 transitions. [2023-11-21 18:57:46,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 18:57:46,180 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 [2023-11-21 18:57:46,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:57:46,241 INFO L225 Difference]: With dead ends: 3011 [2023-11-21 18:57:46,241 INFO L226 Difference]: Without dead ends: 1965 [2023-11-21 18:57:46,258 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 [2023-11-21 18:57:46,266 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, 3.8s IncrementalHoareTripleChecker+Time [2023-11-21 18:57:46,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1491 Valid, 2932 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 334 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2023-11-21 18:57:46,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1965 states. [2023-11-21 18:57:46,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1965 to 1960. [2023-11-21 18:57:46,537 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) [2023-11-21 18:57:46,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1960 states to 1960 states and 2898 transitions. [2023-11-21 18:57:46,564 INFO L78 Accepts]: Start accepts. Automaton has 1960 states and 2898 transitions. Word has length 15 [2023-11-21 18:57:46,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:57:46,565 INFO L495 AbstractCegarLoop]: Abstraction has 1960 states and 2898 transitions. [2023-11-21 18:57:46,565 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) [2023-11-21 18:57:46,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1960 states and 2898 transitions. [2023-11-21 18:57:46,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-21 18:57:46,567 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:57:46,567 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:57:46,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 18:57:46,568 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:57:46,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:57:46,568 INFO L85 PathProgramCache]: Analyzing trace with hash -391926127, now seen corresponding path program 1 times [2023-11-21 18:57:46,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:57:46,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43873030] [2023-11-21 18:57:46,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:57:46,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:57:48,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:57:48,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:57:48,235 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:57:48,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43873030] [2023-11-21 18:57:48,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43873030] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:57:48,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:57:48,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 18:57:48,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645030679] [2023-11-21 18:57:48,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:57:48,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 18:57:48,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:57:48,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 18:57:48,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 18:57:48,240 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) [2023-11-21 18:57:50,283 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 [] [2023-11-21 18:57:52,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:57:52,676 INFO L93 Difference]: Finished difference Result 4851 states and 7174 transitions. [2023-11-21 18:57:52,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 18:57:52,677 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 [2023-11-21 18:57:52,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:57:52,723 INFO L225 Difference]: With dead ends: 4851 [2023-11-21 18:57:52,724 INFO L226 Difference]: Without dead ends: 3891 [2023-11-21 18:57:52,732 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 [2023-11-21 18:57:52,737 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 [2023-11-21 18:57:52,741 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] [2023-11-21 18:57:52,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3891 states. [2023-11-21 18:57:52,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3891 to 3882. [2023-11-21 18:57:53,003 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) [2023-11-21 18:57:53,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3882 states to 3882 states and 5743 transitions. [2023-11-21 18:57:53,051 INFO L78 Accepts]: Start accepts. Automaton has 3882 states and 5743 transitions. Word has length 16 [2023-11-21 18:57:53,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:57:53,052 INFO L495 AbstractCegarLoop]: Abstraction has 3882 states and 5743 transitions. [2023-11-21 18:57:53,052 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) [2023-11-21 18:57:53,052 INFO L276 IsEmpty]: Start isEmpty. Operand 3882 states and 5743 transitions. [2023-11-21 18:57:53,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-21 18:57:53,054 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:57:53,057 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] [2023-11-21 18:57:53,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 18:57:53,059 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:57:53,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:57:53,059 INFO L85 PathProgramCache]: Analyzing trace with hash 653799068, now seen corresponding path program 1 times [2023-11-21 18:57:53,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:57:53,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222174875] [2023-11-21 18:57:53,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:57:53,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:57:54,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:57:54,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:57:54,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:57:54,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222174875] [2023-11-21 18:57:54,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222174875] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:57:54,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:57:54,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 18:57:54,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051411802] [2023-11-21 18:57:54,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:57:54,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 18:57:54,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:57:54,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 18:57:54,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 18:57:54,663 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) [2023-11-21 18:57:56,707 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 [] [2023-11-21 18:57:59,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:57:59,240 INFO L93 Difference]: Finished difference Result 8677 states and 12834 transitions. [2023-11-21 18:57:59,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 18:57:59,240 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 [2023-11-21 18:57:59,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:57:59,326 INFO L225 Difference]: With dead ends: 8677 [2023-11-21 18:57:59,327 INFO L226 Difference]: Without dead ends: 7704 [2023-11-21 18:57:59,338 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 [2023-11-21 18:57:59,339 INFO L413 NwaCegarLoop]: 2095 mSDtfsCounter, 1476 mSDsluCounter, 1299 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s 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, 4.2s IncrementalHoareTripleChecker+Time [2023-11-21 18:57:59,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1476 Valid, 3394 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 368 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2023-11-21 18:57:59,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7704 states. [2023-11-21 18:57:59,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7704 to 7683. [2023-11-21 18:57:59,991 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) [2023-11-21 18:58:00,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7683 states to 7683 states and 11375 transitions. [2023-11-21 18:58:00,058 INFO L78 Accepts]: Start accepts. Automaton has 7683 states and 11375 transitions. Word has length 32 [2023-11-21 18:58:00,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:58:00,060 INFO L495 AbstractCegarLoop]: Abstraction has 7683 states and 11375 transitions. [2023-11-21 18:58:00,061 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) [2023-11-21 18:58:00,061 INFO L276 IsEmpty]: Start isEmpty. Operand 7683 states and 11375 transitions. [2023-11-21 18:58:00,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-21 18:58:00,069 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:58:00,069 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] [2023-11-21 18:58:00,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 18:58:00,070 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:58:00,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:58:00,071 INFO L85 PathProgramCache]: Analyzing trace with hash -322261094, now seen corresponding path program 1 times [2023-11-21 18:58:00,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:58:00,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112738934] [2023-11-21 18:58:00,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:58:00,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms