./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7c8da-2b1b-46c8-be33-a8dfd2773698/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7c8da-2b1b-46c8-be33-a8dfd2773698/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_78a7c8da-2b1b-46c8-be33-a8dfd2773698/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7c8da-2b1b-46c8-be33-a8dfd2773698/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7c8da-2b1b-46c8-be33-a8dfd2773698/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_78a7c8da-2b1b-46c8-be33-a8dfd2773698/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 4de76b02991c4f8780142b48e1370b1ba073d7148b74e77b2c83d6f21359d59e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:36:50,377 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:36:50,443 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7c8da-2b1b-46c8-be33-a8dfd2773698/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 20:36:50,449 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:36:50,450 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:36:50,475 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:36:50,475 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:36:50,476 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:36:50,477 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:36:50,478 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:36:50,478 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:36:50,479 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:36:50,480 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:36:50,480 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:36:50,481 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:36:50,481 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:36:50,482 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:36:50,482 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:36:50,483 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:36:50,484 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:36:50,484 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:36:50,491 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:36:50,492 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:36:50,493 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:36:50,493 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:36:50,494 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:36:50,494 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:36:50,495 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:36:50,495 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:36:50,495 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:36:50,496 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:36:50,497 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:36:50,498 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:36:50,498 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:36:50,498 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:36:50,498 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:36:50,499 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:36:50,499 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:36:50,500 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:36:50,500 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:36:50,500 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:36:50,501 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:36:50,501 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:36:50,501 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:36:50,502 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_78a7c8da-2b1b-46c8-be33-a8dfd2773698/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7c8da-2b1b-46c8-be33-a8dfd2773698/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4de76b02991c4f8780142b48e1370b1ba073d7148b74e77b2c83d6f21359d59e [2023-11-23 20:36:50,777 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:36:50,813 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:36:50,816 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:36:50,818 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:36:50,818 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:36:50,820 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7c8da-2b1b-46c8-be33-a8dfd2773698/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i [2023-11-23 20:36:53,963 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:36:54,553 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:36:54,554 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7c8da-2b1b-46c8-be33-a8dfd2773698/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i [2023-11-23 20:36:54,602 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7c8da-2b1b-46c8-be33-a8dfd2773698/bin/utaipan-verify-mE87zJ7Ire/data/fe43b57b2/c2d6b904c2464324a93bf704e9f35762/FLAG3d7da4c5d [2023-11-23 20:36:54,623 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7c8da-2b1b-46c8-be33-a8dfd2773698/bin/utaipan-verify-mE87zJ7Ire/data/fe43b57b2/c2d6b904c2464324a93bf704e9f35762 [2023-11-23 20:36:54,632 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:36:54,634 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:36:54,637 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:36:54,637 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:36:54,643 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:36:54,644 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:36:54" (1/1) ... [2023-11-23 20:36:54,645 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54f1f2e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:54, skipping insertion in model container [2023-11-23 20:36:54,645 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:36:54" (1/1) ... [2023-11-23 20:36:54,798 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:36:56,616 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_78a7c8da-2b1b-46c8-be33-a8dfd2773698/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i[185536,185549] [2023-11-23 20:36:56,834 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:36:56,868 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:36:56,969 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; bts %1,%0": "+m" (*((long volatile *)addr)): "Ir" (nr): "memory"); [3542] [2023-11-23 20:36:56,972 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; btr %1,%0": "+m" (*((long volatile *)addr)): "Ir" (nr)); [3549] [2023-11-23 20:36:56,972 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; bts %2, %0; setc %1": "+m" (*addr), "=qm" (c): "Ir" (nr): "memory"); [3557-3558] [2023-11-23 20:36:57,157 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_78a7c8da-2b1b-46c8-be33-a8dfd2773698/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i[185536,185549] [2023-11-23 20:36:57,180 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:36:57,295 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:36:57,296 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:57 WrapperNode [2023-11-23 20:36:57,296 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:36:57,297 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:36:57,298 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:36:57,298 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:36:57,309 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:57" (1/1) ... [2023-11-23 20:36:57,423 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:57" (1/1) ... [2023-11-23 20:36:57,602 INFO L138 Inliner]: procedures = 282, calls = 1543, calls flagged for inlining = 103, calls inlined = 86, statements flattened = 2808 [2023-11-23 20:36:57,603 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:36:57,603 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:36:57,604 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:36:57,604 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:36:57,613 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:57" (1/1) ... [2023-11-23 20:36:57,614 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:57" (1/1) ... [2023-11-23 20:36:57,630 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:57" (1/1) ... [2023-11-23 20:36:57,631 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:57" (1/1) ... [2023-11-23 20:36:57,721 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:57" (1/1) ... [2023-11-23 20:36:57,755 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:57" (1/1) ... [2023-11-23 20:36:57,787 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:57" (1/1) ... [2023-11-23 20:36:57,805 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:57" (1/1) ... [2023-11-23 20:36:57,842 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:36:57,844 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:36:57,844 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:36:57,844 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:36:57,845 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:57" (1/1) ... [2023-11-23 20:36:57,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:36:57,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7c8da-2b1b-46c8-be33-a8dfd2773698/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:57,877 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7c8da-2b1b-46c8-be33-a8dfd2773698/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:36:57,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7c8da-2b1b-46c8-be33-a8dfd2773698/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:36:57,927 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2023-11-23 20:36:57,927 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2023-11-23 20:36:57,927 INFO L130 BoogieDeclarations]: Found specification of procedure usb_translate_errors [2023-11-23 20:36:57,928 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_translate_errors [2023-11-23 20:36:57,928 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-23 20:36:57,928 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-23 20:36:57,928 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-11-23 20:36:57,928 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-11-23 20:36:57,929 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_wdm_mutex [2023-11-23 20:36:57,929 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_wdm_mutex [2023-11-23 20:36:57,929 INFO L130 BoogieDeclarations]: Found specification of procedure recover_from_urb_loss [2023-11-23 20:36:57,929 INFO L138 BoogieDeclarations]: Found implementation of procedure recover_from_urb_loss [2023-11-23 20:36:57,929 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_control_urb [2023-11-23 20:36:57,930 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_control_urb [2023-11-23 20:36:57,930 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-23 20:36:57,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-23 20:36:57,930 INFO L130 BoogieDeclarations]: Found specification of procedure activate_work_1 [2023-11-23 20:36:57,930 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_work_1 [2023-11-23 20:36:57,930 INFO L130 BoogieDeclarations]: Found specification of procedure __might_sleep [2023-11-23 20:36:57,931 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_sleep [2023-11-23 20:36:57,931 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_get_interface [2023-11-23 20:36:57,931 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_get_interface [2023-11-23 20:36:57,931 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_create [2023-11-23 20:36:57,931 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_create [2023-11-23 20:36:57,931 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-11-23 20:36:57,932 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-11-23 20:36:57,932 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-23 20:36:57,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-23 20:36:57,932 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_poll [2023-11-23 20:36:57,932 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_poll [2023-11-23 20:36:57,932 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2023-11-23 20:36:57,933 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2023-11-23 20:36:57,933 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 20:36:57,933 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 20:36:57,933 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2023-11-23 20:36:57,933 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2023-11-23 20:36:57,933 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2023-11-23 20:36:57,933 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2023-11-23 20:36:57,934 INFO L130 BoogieDeclarations]: Found specification of procedure clear_wdm_read_flag [2023-11-23 20:36:57,934 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_wdm_read_flag [2023-11-23 20:36:57,934 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_cancel_work_sync_39 [2023-11-23 20:36:57,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_cancel_work_sync_39 [2023-11-23 20:36:57,934 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_write [2023-11-23 20:36:57,934 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_write [2023-11-23 20:36:57,935 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 20:36:57,935 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2023-11-23 20:36:57,935 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2023-11-23 20:36:57,935 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_ioctl [2023-11-23 20:36:57,935 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_ioctl [2023-11-23 20:36:57,935 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_disconnect [2023-11-23 20:36:57,936 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_disconnect [2023-11-23 20:36:57,936 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 20:36:57,936 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_rlock_of_wdm_device [2023-11-23 20:36:57,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_rlock_of_wdm_device [2023-11-23 20:36:57,936 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2023-11-23 20:36:57,936 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2023-11-23 20:36:57,937 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_interruptible [2023-11-23 20:36:57,937 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_interruptible [2023-11-23 20:36:57,937 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_rxwork [2023-11-23 20:36:57,937 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_rxwork [2023-11-23 20:36:57,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 20:36:57,937 INFO L130 BoogieDeclarations]: Found specification of procedure disable_work_1 [2023-11-23 20:36:57,938 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_work_1 [2023-11-23 20:36:57,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 20:36:57,938 INFO L130 BoogieDeclarations]: Found specification of procedure dev_err [2023-11-23 20:36:57,938 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_err [2023-11-23 20:36:57,938 INFO L130 BoogieDeclarations]: Found specification of procedure cancel_work_sync [2023-11-23 20:36:57,938 INFO L138 BoogieDeclarations]: Found implementation of procedure cancel_work_sync [2023-11-23 20:36:57,938 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2023-11-23 20:36:57,939 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2023-11-23 20:36:57,939 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2023-11-23 20:36:57,939 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2023-11-23 20:36:57,939 INFO L130 BoogieDeclarations]: Found specification of procedure __mutex_init [2023-11-23 20:36:57,939 INFO L138 BoogieDeclarations]: Found implementation of procedure __mutex_init [2023-11-23 20:36:57,939 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work_on [2023-11-23 20:36:57,940 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work_on [2023-11-23 20:36:57,940 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2023-11-23 20:36:57,940 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2023-11-23 20:36:57,940 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2023-11-23 20:36:57,940 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2023-11-23 20:36:57,940 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_wdm_mutex [2023-11-23 20:36:57,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_wdm_mutex [2023-11-23 20:36:57,941 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_wlock_of_wdm_device [2023-11-23 20:36:57,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_wlock_of_wdm_device [2023-11-23 20:36:57,941 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2023-11-23 20:36:57,941 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2023-11-23 20:36:57,941 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2023-11-23 20:36:57,942 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2023-11-23 20:36:57,942 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2023-11-23 20:36:57,942 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2023-11-23 20:36:57,942 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_flush [2023-11-23 20:36:57,942 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_flush [2023-11-23 20:36:57,942 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_wlock_of_wdm_device [2023-11-23 20:36:57,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_wlock_of_wdm_device [2023-11-23 20:36:57,943 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2023-11-23 20:36:57,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2023-11-23 20:36:57,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-23 20:36:57,943 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_put_interface [2023-11-23 20:36:57,943 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_put_interface [2023-11-23 20:36:57,943 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 20:36:57,944 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2023-11-23 20:36:57,944 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2023-11-23 20:36:57,944 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2023-11-23 20:36:57,944 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2023-11-23 20:36:57,944 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2023-11-23 20:36:57,944 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2023-11-23 20:36:57,945 INFO L130 BoogieDeclarations]: Found specification of procedure kill_urbs [2023-11-23 20:36:57,945 INFO L138 BoogieDeclarations]: Found implementation of procedure kill_urbs [2023-11-23 20:36:57,945 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait_event [2023-11-23 20:36:57,945 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait_event [2023-11-23 20:36:57,945 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-23 20:36:57,945 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-23 20:36:57,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 20:36:57,946 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2023-11-23 20:36:57,946 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2023-11-23 20:36:57,946 INFO L130 BoogieDeclarations]: Found specification of procedure __dynamic_dev_dbg [2023-11-23 20:36:57,946 INFO L138 BoogieDeclarations]: Found implementation of procedure __dynamic_dev_dbg [2023-11-23 20:36:57,946 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2023-11-23 20:36:57,946 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2023-11-23 20:36:57,947 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-23 20:36:57,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-23 20:36:57,947 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2023-11-23 20:36:57,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2023-11-23 20:36:57,947 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_resume [2023-11-23 20:36:57,947 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_resume [2023-11-23 20:36:57,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 20:36:57,948 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2023-11-23 20:36:57,948 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2023-11-23 20:36:57,948 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2023-11-23 20:36:57,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2023-11-23 20:36:57,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:36:57,949 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2023-11-23 20:36:57,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2023-11-23 20:36:57,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 20:36:57,949 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2023-11-23 20:36:57,949 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2023-11-23 20:36:57,949 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2023-11-23 20:36:57,949 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2023-11-23 20:36:57,950 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2023-11-23 20:36:57,950 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2023-11-23 20:36:57,950 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-23 20:36:57,950 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-23 20:36:57,950 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_rlock_of_wdm_device [2023-11-23 20:36:57,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_rlock_of_wdm_device [2023-11-23 20:36:57,951 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_work [2023-11-23 20:36:57,951 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_work [2023-11-23 20:36:57,951 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_find_device [2023-11-23 20:36:57,951 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_find_device [2023-11-23 20:36:57,951 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2023-11-23 20:36:57,951 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2023-11-23 20:36:57,952 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2023-11-23 20:36:57,952 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2023-11-23 20:36:57,952 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:36:57,952 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2023-11-23 20:36:57,952 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2023-11-23 20:36:57,952 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2023-11-23 20:36:57,952 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2023-11-23 20:36:57,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:36:57,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:36:58,451 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:36:58,455 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:36:58,954 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-23 20:37:01,686 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:37:02,605 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:37:02,605 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-23 20:37:02,607 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:37:02 BoogieIcfgContainer [2023-11-23 20:37:02,607 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:37:02,610 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:37:02,610 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:37:02,614 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:37:02,643 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:36:54" (1/3) ... [2023-11-23 20:37:02,644 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eb305e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:37:02, skipping insertion in model container [2023-11-23 20:37:02,644 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:57" (2/3) ... [2023-11-23 20:37:02,645 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eb305e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:37:02, skipping insertion in model container [2023-11-23 20:37:02,645 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:37:02" (3/3) ... [2023-11-23 20:37:02,646 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i [2023-11-23 20:37:02,670 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:37:02,671 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 20:37:02,772 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:37:02,784 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;@7429dae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:37:02,784 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 20:37:02,795 INFO L276 IsEmpty]: Start isEmpty. Operand has 905 states, 515 states have (on average 1.3203883495145632) internal successors, (680), 550 states have internal predecessors, (680), 316 states have call successors, (316), 73 states have call predecessors, (316), 72 states have return successors, (311), 309 states have call predecessors, (311), 311 states have call successors, (311) [2023-11-23 20:37:02,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-11-23 20:37:02,822 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:02,823 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:37:02,824 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:02,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:02,831 INFO L85 PathProgramCache]: Analyzing trace with hash -260946755, now seen corresponding path program 1 times [2023-11-23 20:37:02,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:02,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202381318] [2023-11-23 20:37:02,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:02,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:03,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:04,336 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2023-11-23 20:37:04,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:04,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202381318] [2023-11-23 20:37:04,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202381318] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:04,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:04,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:37:04,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462751096] [2023-11-23 20:37:04,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:04,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:37:04,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:04,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:37:04,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:37:04,395 INFO L87 Difference]: Start difference. First operand has 905 states, 515 states have (on average 1.3203883495145632) internal successors, (680), 550 states have internal predecessors, (680), 316 states have call successors, (316), 73 states have call predecessors, (316), 72 states have return successors, (311), 309 states have call predecessors, (311), 311 states have call successors, (311) Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2023-11-23 20:37:08,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 20:37:10,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 20:37:12,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 20:37:12,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:12,359 INFO L93 Difference]: Finished difference Result 2619 states and 3830 transitions. [2023-11-23 20:37:12,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:37:12,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) Word has length 140 [2023-11-23 20:37:12,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:12,405 INFO L225 Difference]: With dead ends: 2619 [2023-11-23 20:37:12,406 INFO L226 Difference]: Without dead ends: 1736 [2023-11-23 20:37:12,417 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 20:37:12,420 INFO L413 NwaCegarLoop]: 1177 mSDtfsCounter, 1204 mSDsluCounter, 1164 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1204 SdHoareTripleChecker+Valid, 2341 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:12,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1204 Valid, 2341 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 244 Invalid, 3 Unknown, 0 Unchecked, 7.6s Time] [2023-11-23 20:37:12,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1736 states. [2023-11-23 20:37:12,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1736 to 1726. [2023-11-23 20:37:12,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1726 states, 995 states have (on average 1.307537688442211) internal successors, (1301), 1038 states have internal predecessors, (1301), 589 states have call successors, (589), 142 states have call predecessors, (589), 141 states have return successors, (575), 571 states have call predecessors, (575), 575 states have call successors, (575) [2023-11-23 20:37:12,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 2465 transitions. [2023-11-23 20:37:12,686 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 2465 transitions. Word has length 140 [2023-11-23 20:37:12,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:12,690 INFO L495 AbstractCegarLoop]: Abstraction has 1726 states and 2465 transitions. [2023-11-23 20:37:12,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2023-11-23 20:37:12,691 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 2465 transitions. [2023-11-23 20:37:12,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-23 20:37:12,696 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:12,696 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:37:12,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 20:37:12,697 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:12,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:12,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1941028002, now seen corresponding path program 1 times [2023-11-23 20:37:12,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:12,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974208654] [2023-11-23 20:37:12,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:12,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:13,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:13,386 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2023-11-23 20:37:13,386 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:13,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974208654] [2023-11-23 20:37:13,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974208654] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:13,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:13,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:37:13,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4496316] [2023-11-23 20:37:13,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:13,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:37:13,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:13,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:37:13,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:37:13,397 INFO L87 Difference]: Start difference. First operand 1726 states and 2465 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-23 20:37:15,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 20:37:18,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 20:37:20,364 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 20:37:22,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 20:37:22,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:22,404 INFO L93 Difference]: Finished difference Result 4327 states and 6107 transitions. [2023-11-23 20:37:22,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:37:22,404 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 145 [2023-11-23 20:37:22,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:22,427 INFO L225 Difference]: With dead ends: 4327 [2023-11-23 20:37:22,428 INFO L226 Difference]: Without dead ends: 2637 [2023-11-23 20:37:22,436 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 20:37:22,437 INFO L413 NwaCegarLoop]: 1170 mSDtfsCounter, 676 mSDsluCounter, 1080 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 2250 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:22,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [676 Valid, 2250 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 269 Invalid, 3 Unknown, 0 Unchecked, 8.8s Time] [2023-11-23 20:37:22,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2637 states. [2023-11-23 20:37:22,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2637 to 2616. [2023-11-23 20:37:22,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2616 states, 1506 states have (on average 1.299468791500664) internal successors, (1957), 1559 states have internal predecessors, (1957), 862 states have call successors, (862), 248 states have call predecessors, (862), 247 states have return successors, (848), 840 states have call predecessors, (848), 848 states have call successors, (848) [2023-11-23 20:37:22,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2616 states to 2616 states and 3667 transitions. [2023-11-23 20:37:22,617 INFO L78 Accepts]: Start accepts. Automaton has 2616 states and 3667 transitions. Word has length 145 [2023-11-23 20:37:22,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:22,622 INFO L495 AbstractCegarLoop]: Abstraction has 2616 states and 3667 transitions. [2023-11-23 20:37:22,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-23 20:37:22,624 INFO L276 IsEmpty]: Start isEmpty. Operand 2616 states and 3667 transitions. [2023-11-23 20:37:22,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-11-23 20:37:22,631 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:22,632 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:37:22,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 20:37:22,633 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:22,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:22,647 INFO L85 PathProgramCache]: Analyzing trace with hash -728280398, now seen corresponding path program 1 times [2023-11-23 20:37:22,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:22,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653363415] [2023-11-23 20:37:22,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:22,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:23,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:23,403 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2023-11-23 20:37:23,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:23,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653363415] [2023-11-23 20:37:23,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653363415] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:23,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:23,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:37:23,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963704906] [2023-11-23 20:37:23,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:23,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:37:23,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:23,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:37:23,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:37:23,412 INFO L87 Difference]: Start difference. First operand 2616 states and 3667 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-23 20:37:26,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 20:37:26,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:26,938 INFO L93 Difference]: Finished difference Result 2618 states and 3668 transitions. [2023-11-23 20:37:26,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:37:26,939 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 155 [2023-11-23 20:37:26,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:26,961 INFO L225 Difference]: With dead ends: 2618 [2023-11-23 20:37:26,961 INFO L226 Difference]: Without dead ends: 2615 [2023-11-23 20:37:26,963 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 20:37:26,964 INFO L413 NwaCegarLoop]: 1158 mSDtfsCounter, 1232 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1232 SdHoareTripleChecker+Valid, 1158 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:26,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1232 Valid, 1158 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 118 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2023-11-23 20:37:26,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2615 states. [2023-11-23 20:37:27,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2615 to 2615. [2023-11-23 20:37:27,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2615 states, 1506 states have (on average 1.298804780876494) internal successors, (1956), 1558 states have internal predecessors, (1956), 861 states have call successors, (861), 248 states have call predecessors, (861), 247 states have return successors, (848), 840 states have call predecessors, (848), 848 states have call successors, (848) [2023-11-23 20:37:27,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2615 states to 2615 states and 3665 transitions. [2023-11-23 20:37:27,172 INFO L78 Accepts]: Start accepts. Automaton has 2615 states and 3665 transitions. Word has length 155 [2023-11-23 20:37:27,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:27,172 INFO L495 AbstractCegarLoop]: Abstraction has 2615 states and 3665 transitions. [2023-11-23 20:37:27,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-23 20:37:27,173 INFO L276 IsEmpty]: Start isEmpty. Operand 2615 states and 3665 transitions. [2023-11-23 20:37:27,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-11-23 20:37:27,179 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:27,180 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:37:27,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 20:37:27,180 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:27,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:27,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1102374786, now seen corresponding path program 1 times [2023-11-23 20:37:27,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:27,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877721306] [2023-11-23 20:37:27,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:27,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:27,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:27,895 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2023-11-23 20:37:27,895 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:27,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877721306] [2023-11-23 20:37:27,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877721306] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:27,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:27,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:37:27,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573649624] [2023-11-23 20:37:27,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:27,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:37:27,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:27,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:37:27,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:37:27,899 INFO L87 Difference]: Start difference. First operand 2615 states and 3665 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-23 20:37:29,933 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 20:37:32,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 20:37:32,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:32,499 INFO L93 Difference]: Finished difference Result 2617 states and 3666 transitions. [2023-11-23 20:37:32,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:37:32,499 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 156 [2023-11-23 20:37:32,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:32,519 INFO L225 Difference]: With dead ends: 2617 [2023-11-23 20:37:32,519 INFO L226 Difference]: Without dead ends: 2614 [2023-11-23 20:37:32,521 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 20:37:32,522 INFO L413 NwaCegarLoop]: 1156 mSDtfsCounter, 1229 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1229 SdHoareTripleChecker+Valid, 1156 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:32,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1229 Valid, 1156 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 117 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2023-11-23 20:37:32,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2614 states. [2023-11-23 20:37:32,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2614 to 2614. [2023-11-23 20:37:32,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2614 states, 1506 states have (on average 1.298140770252324) internal successors, (1955), 1557 states have internal predecessors, (1955), 860 states have call successors, (860), 248 states have call predecessors, (860), 247 states have return successors, (848), 840 states have call predecessors, (848), 848 states have call successors, (848) [2023-11-23 20:37:32,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2614 states to 2614 states and 3663 transitions. [2023-11-23 20:37:32,733 INFO L78 Accepts]: Start accepts. Automaton has 2614 states and 3663 transitions. Word has length 156 [2023-11-23 20:37:32,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:32,735 INFO L495 AbstractCegarLoop]: Abstraction has 2614 states and 3663 transitions. [2023-11-23 20:37:32,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-23 20:37:32,736 INFO L276 IsEmpty]: Start isEmpty. Operand 2614 states and 3663 transitions. [2023-11-23 20:37:32,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-11-23 20:37:32,739 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:32,739 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:37:32,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 20:37:32,740 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:32,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:32,741 INFO L85 PathProgramCache]: Analyzing trace with hash 185605941, now seen corresponding path program 1 times [2023-11-23 20:37:32,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:32,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927043267] [2023-11-23 20:37:32,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:32,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:33,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:33,277 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2023-11-23 20:37:33,277 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:33,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927043267] [2023-11-23 20:37:33,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927043267] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:33,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:33,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:37:33,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257637399] [2023-11-23 20:37:33,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:33,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:37:33,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:33,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:37:33,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:37:33,280 INFO L87 Difference]: Start difference. First operand 2614 states and 3663 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-23 20:37:35,316 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 20:37:38,068 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 20:37:38,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:38,101 INFO L93 Difference]: Finished difference Result 2616 states and 3664 transitions. [2023-11-23 20:37:38,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:37:38,102 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 157 [2023-11-23 20:37:38,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:38,123 INFO L225 Difference]: With dead ends: 2616 [2023-11-23 20:37:38,123 INFO L226 Difference]: Without dead ends: 2613 [2023-11-23 20:37:38,126 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 20:37:38,127 INFO L413 NwaCegarLoop]: 1154 mSDtfsCounter, 1226 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1226 SdHoareTripleChecker+Valid, 1154 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:38,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1226 Valid, 1154 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 117 Invalid, 2 Unknown, 0 Unchecked, 4.7s Time] [2023-11-23 20:37:38,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2613 states. [2023-11-23 20:37:38,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2613 to 2613. [2023-11-23 20:37:38,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2613 states, 1506 states have (on average 1.297476759628154) internal successors, (1954), 1556 states have internal predecessors, (1954), 859 states have call successors, (859), 248 states have call predecessors, (859), 247 states have return successors, (848), 840 states have call predecessors, (848), 848 states have call successors, (848) [2023-11-23 20:37:38,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2613 states to 2613 states and 3661 transitions. [2023-11-23 20:37:38,342 INFO L78 Accepts]: Start accepts. Automaton has 2613 states and 3661 transitions. Word has length 157 [2023-11-23 20:37:38,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:38,348 INFO L495 AbstractCegarLoop]: Abstraction has 2613 states and 3661 transitions. [2023-11-23 20:37:38,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-23 20:37:38,349 INFO L276 IsEmpty]: Start isEmpty. Operand 2613 states and 3661 transitions. [2023-11-23 20:37:38,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-11-23 20:37:38,352 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:38,352 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:37:38,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 20:37:38,352 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:38,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:38,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1104815090, now seen corresponding path program 1 times [2023-11-23 20:37:38,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:38,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352290809] [2023-11-23 20:37:38,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:38,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:38,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:38,870 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2023-11-23 20:37:38,871 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:38,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352290809] [2023-11-23 20:37:38,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352290809] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:38,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:38,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:37:38,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427687678] [2023-11-23 20:37:38,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:38,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:37:38,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:38,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:37:38,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:37:38,873 INFO L87 Difference]: Start difference. First operand 2613 states and 3661 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-23 20:37:40,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 20:37:43,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 20:37:45,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 20:37:46,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:46,036 INFO L93 Difference]: Finished difference Result 6519 states and 9107 transitions. [2023-11-23 20:37:46,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:37:46,037 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 161 [2023-11-23 20:37:46,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:46,067 INFO L225 Difference]: With dead ends: 6519 [2023-11-23 20:37:46,067 INFO L226 Difference]: Without dead ends: 3950 [2023-11-23 20:37:46,122 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 20:37:46,123 INFO L413 NwaCegarLoop]: 1555 mSDtfsCounter, 865 mSDsluCounter, 1091 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 865 SdHoareTripleChecker+Valid, 2646 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:46,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [865 Valid, 2646 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 290 Invalid, 3 Unknown, 0 Unchecked, 6.9s Time] [2023-11-23 20:37:46,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3950 states. [2023-11-23 20:37:46,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3950 to 3929. [2023-11-23 20:37:46,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3929 states, 2301 states have (on average 1.302477183833116) internal successors, (2997), 2379 states have internal predecessors, (2997), 1247 states have call successors, (1247), 381 states have call predecessors, (1247), 380 states have return successors, (1236), 1224 states have call predecessors, (1236), 1236 states have call successors, (1236) [2023-11-23 20:37:46,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3929 states to 3929 states and 5480 transitions. [2023-11-23 20:37:46,469 INFO L78 Accepts]: Start accepts. Automaton has 3929 states and 5480 transitions. Word has length 161 [2023-11-23 20:37:46,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:46,470 INFO L495 AbstractCegarLoop]: Abstraction has 3929 states and 5480 transitions. [2023-11-23 20:37:46,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-23 20:37:46,471 INFO L276 IsEmpty]: Start isEmpty. Operand 3929 states and 5480 transitions. [2023-11-23 20:37:46,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-11-23 20:37:46,474 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:46,474 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:37:46,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 20:37:46,475 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:46,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:46,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1458307681, now seen corresponding path program 1 times [2023-11-23 20:37:46,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:46,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096054313] [2023-11-23 20:37:46,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:46,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:46,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:47,050 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2023-11-23 20:37:47,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:47,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096054313] [2023-11-23 20:37:47,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096054313] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:47,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:47,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:37:47,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999602180] [2023-11-23 20:37:47,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:47,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:37:47,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:47,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:37:47,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:37:47,055 INFO L87 Difference]: Start difference. First operand 3929 states and 5480 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19)