./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--mwifiex--mwifiex_usb.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_359232f6-5d77-4a6d-b17d-da667cb48a51/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359232f6-5d77-4a6d-b17d-da667cb48a51/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_359232f6-5d77-4a6d-b17d-da667cb48a51/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359232f6-5d77-4a6d-b17d-da667cb48a51/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359232f6-5d77-4a6d-b17d-da667cb48a51/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_359232f6-5d77-4a6d-b17d-da667cb48a51/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 9f2fac8642c25f1335350a2814ff7cf3c4ea0fb7f4feaed63baec564397e8f24 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:16:44,244 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:16:44,319 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359232f6-5d77-4a6d-b17d-da667cb48a51/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 21:16:44,323 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:16:44,324 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:16:44,349 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:16:44,350 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:16:44,351 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:16:44,351 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:16:44,352 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:16:44,352 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:16:44,353 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:16:44,354 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:16:44,354 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:16:44,355 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:16:44,355 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:16:44,356 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:16:44,356 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:16:44,357 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:16:44,357 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:16:44,358 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:16:44,365 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:16:44,366 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:16:44,366 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:16:44,367 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:16:44,367 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:16:44,367 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:16:44,368 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:16:44,368 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:16:44,368 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:16:44,369 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:16:44,369 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:16:44,370 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:16:44,370 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:16:44,370 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:16:44,371 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:16:44,371 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:16:44,372 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:16:44,372 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:16:44,372 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:16:44,373 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:16:44,375 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:16:44,375 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:16:44,375 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:16:44,376 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_359232f6-5d77-4a6d-b17d-da667cb48a51/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359232f6-5d77-4a6d-b17d-da667cb48a51/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9f2fac8642c25f1335350a2814ff7cf3c4ea0fb7f4feaed63baec564397e8f24 [2023-11-23 21:16:44,636 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:16:44,658 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:16:44,661 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:16:44,662 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:16:44,663 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:16:44,664 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359232f6-5d77-4a6d-b17d-da667cb48a51/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i [2023-11-23 21:16:47,962 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:16:48,583 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:16:48,583 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359232f6-5d77-4a6d-b17d-da667cb48a51/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i [2023-11-23 21:16:48,636 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359232f6-5d77-4a6d-b17d-da667cb48a51/bin/utaipan-verify-mE87zJ7Ire/data/d89bfcc2d/f6369ce461fa40fc846667941c6d38c4/FLAG47e276031 [2023-11-23 21:16:48,653 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359232f6-5d77-4a6d-b17d-da667cb48a51/bin/utaipan-verify-mE87zJ7Ire/data/d89bfcc2d/f6369ce461fa40fc846667941c6d38c4 [2023-11-23 21:16:48,663 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:16:48,665 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:16:48,667 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:16:48,668 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:16:48,673 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:16:48,676 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:16:48" (1/1) ... [2023-11-23 21:16:48,678 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b9d106e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:48, skipping insertion in model container [2023-11-23 21:16:48,678 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:16:48" (1/1) ... [2023-11-23 21:16:48,819 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:16:49,884 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_359232f6-5d77-4a6d-b17d-da667cb48a51/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i[202214,202227] [2023-11-23 21:16:50,513 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:16:50,558 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:16:50,733 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; incl %0": "+m" (v->counter)); [6865] [2023-11-23 21:16:50,735 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; decl %0": "+m" (v->counter)); [6872] [2023-11-23 21:16:50,752 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_359232f6-5d77-4a6d-b17d-da667cb48a51/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i[202214,202227] [2023-11-23 21:16:50,994 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:16:51,133 WARN L675 CHandler]: The function __VERIFIER_nondet_u8 is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:16:51,141 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:16:51,142 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:51 WrapperNode [2023-11-23 21:16:51,142 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:16:51,144 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:16:51,144 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:16:51,144 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:16:51,152 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:51" (1/1) ... [2023-11-23 21:16:51,239 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:51" (1/1) ... [2023-11-23 21:16:51,454 INFO L138 Inliner]: procedures = 163, calls = 1241, calls flagged for inlining = 76, calls inlined = 76, statements flattened = 3223 [2023-11-23 21:16:51,454 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:16:51,455 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:16:51,455 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:16:51,456 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:16:51,465 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:51" (1/1) ... [2023-11-23 21:16:51,465 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:51" (1/1) ... [2023-11-23 21:16:51,496 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:51" (1/1) ... [2023-11-23 21:16:51,500 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:51" (1/1) ... [2023-11-23 21:16:51,595 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:51" (1/1) ... [2023-11-23 21:16:51,610 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:51" (1/1) ... [2023-11-23 21:16:51,629 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:51" (1/1) ... [2023-11-23 21:16:51,647 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:51" (1/1) ... [2023-11-23 21:16:51,677 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:16:51,678 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:16:51,680 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:16:51,680 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:16:51,681 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:51" (1/1) ... [2023-11-23 21:16:51,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:16:51,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359232f6-5d77-4a6d-b17d-da667cb48a51/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:16:51,716 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359232f6-5d77-4a6d-b17d-da667cb48a51/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:16:51,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359232f6-5d77-4a6d-b17d-da667cb48a51/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:16:51,757 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2023-11-23 21:16:51,758 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2023-11-23 21:16:51,758 INFO L130 BoogieDeclarations]: Found specification of procedure mwifiex_unregister_dev [2023-11-23 21:16:51,760 INFO L138 BoogieDeclarations]: Found implementation of procedure mwifiex_unregister_dev [2023-11-23 21:16:51,760 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_fill_bulk_urb_2 [2023-11-23 21:16:51,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_fill_bulk_urb_2 [2023-11-23 21:16:51,760 INFO L130 BoogieDeclarations]: Found specification of procedure skb_copy_from_linear_data [2023-11-23 21:16:51,760 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_copy_from_linear_data [2023-11-23 21:16:51,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-23 21:16:51,761 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_3 [2023-11-23 21:16:51,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_3 [2023-11-23 21:16:51,761 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-23 21:16:51,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-23 21:16:51,761 INFO L130 BoogieDeclarations]: Found specification of procedure usb_bulk_msg [2023-11-23 21:16:51,762 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_bulk_msg [2023-11-23 21:16:51,762 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-23 21:16:51,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-23 21:16:51,763 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:16:51,763 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_bulk [2023-11-23 21:16:51,763 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_bulk [2023-11-23 21:16:51,763 INFO L130 BoogieDeclarations]: Found specification of procedure skb_push [2023-11-23 21:16:51,763 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_push [2023-11-23 21:16:51,764 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2023-11-23 21:16:51,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2023-11-23 21:16:51,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-11-23 21:16:51,765 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-11-23 21:16:51,766 INFO L130 BoogieDeclarations]: Found specification of procedure mwifiex_usb_disconnect [2023-11-23 21:16:51,766 INFO L138 BoogieDeclarations]: Found implementation of procedure mwifiex_usb_disconnect [2023-11-23 21:16:51,766 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2023-11-23 21:16:51,766 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2023-11-23 21:16:51,767 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-23 21:16:51,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-23 21:16:51,768 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_urb [2023-11-23 21:16:51,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_urb [2023-11-23 21:16:51,768 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2023-11-23 21:16:51,768 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2023-11-23 21:16:51,768 INFO L130 BoogieDeclarations]: Found specification of procedure mwifiex_get_priv [2023-11-23 21:16:51,768 INFO L138 BoogieDeclarations]: Found implementation of procedure mwifiex_get_priv [2023-11-23 21:16:51,769 INFO L130 BoogieDeclarations]: Found specification of procedure mwifiex_usb_submit_rx_urb [2023-11-23 21:16:51,769 INFO L138 BoogieDeclarations]: Found implementation of procedure mwifiex_usb_submit_rx_urb [2023-11-23 21:16:51,769 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-23 21:16:51,769 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-23 21:16:51,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:16:51,769 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-23 21:16:51,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-23 21:16:51,770 INFO L130 BoogieDeclarations]: Found specification of procedure mwifiex_usb_rx_complete [2023-11-23 21:16:51,770 INFO L138 BoogieDeclarations]: Found implementation of procedure mwifiex_usb_rx_complete [2023-11-23 21:16:51,770 INFO L130 BoogieDeclarations]: Found specification of procedure __dynamic_dev_dbg [2023-11-23 21:16:51,770 INFO L138 BoogieDeclarations]: Found implementation of procedure __dynamic_dev_dbg [2023-11-23 21:16:51,770 INFO L130 BoogieDeclarations]: Found specification of procedure __dynamic_pr_debug [2023-11-23 21:16:51,771 INFO L138 BoogieDeclarations]: Found implementation of procedure __dynamic_pr_debug [2023-11-23 21:16:51,771 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_in [2023-11-23 21:16:51,771 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_in [2023-11-23 21:16:51,771 INFO L130 BoogieDeclarations]: Found specification of procedure dev_alloc_skb [2023-11-23 21:16:51,771 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_alloc_skb [2023-11-23 21:16:51,771 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-23 21:16:51,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-23 21:16:51,772 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2023-11-23 21:16:51,772 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2023-11-23 21:16:51,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-23 21:16:51,774 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-23 21:16:51,775 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 21:16:51,775 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 21:16:51,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:16:51,775 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2023-11-23 21:16:51,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2023-11-23 21:16:51,775 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_any [2023-11-23 21:16:51,776 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_any [2023-11-23 21:16:51,776 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:16:51,776 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_inc [2023-11-23 21:16:51,776 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_inc [2023-11-23 21:16:51,777 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2023-11-23 21:16:51,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2023-11-23 21:16:51,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 21:16:51,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:16:51,777 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2023-11-23 21:16:51,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2023-11-23 21:16:51,778 INFO L130 BoogieDeclarations]: Found specification of procedure mwifiex_usb_cmd_event_complete [2023-11-23 21:16:51,778 INFO L138 BoogieDeclarations]: Found implementation of procedure mwifiex_usb_cmd_event_complete [2023-11-23 21:16:51,778 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_8 [2023-11-23 21:16:51,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_8 [2023-11-23 21:16:51,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 21:16:51,778 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec [2023-11-23 21:16:51,779 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec [2023-11-23 21:16:51,780 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_num [2023-11-23 21:16:51,780 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_num [2023-11-23 21:16:51,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:16:51,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 21:16:51,780 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-23 21:16:51,780 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-23 21:16:51,781 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_get_intfdata_10 [2023-11-23 21:16:51,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_get_intfdata_10 [2023-11-23 21:16:51,781 INFO L130 BoogieDeclarations]: Found specification of procedure dev_err [2023-11-23 21:16:51,781 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_err [2023-11-23 21:16:51,781 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2023-11-23 21:16:51,781 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2023-11-23 21:16:51,782 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2023-11-23 21:16:51,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2023-11-23 21:16:51,782 INFO L130 BoogieDeclarations]: Found specification of procedure dev_warn [2023-11-23 21:16:51,782 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_warn [2023-11-23 21:16:51,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:16:51,782 INFO L130 BoogieDeclarations]: Found specification of procedure mwifiex_usb_resume [2023-11-23 21:16:51,782 INFO L138 BoogieDeclarations]: Found implementation of procedure mwifiex_usb_resume [2023-11-23 21:16:51,783 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work [2023-11-23 21:16:51,783 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work [2023-11-23 21:16:51,783 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2023-11-23 21:16:51,784 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2023-11-23 21:16:51,784 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-23 21:16:51,784 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u8 [2023-11-23 21:16:51,784 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2023-11-23 21:16:51,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2023-11-23 21:16:51,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:16:51,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:16:51,786 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_out [2023-11-23 21:16:51,786 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_out [2023-11-23 21:16:52,507 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:16:52,514 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:16:52,877 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-23 21:16:53,955 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2023-11-23 21:16:57,661 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:16:58,370 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:16:58,370 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 21:16:58,373 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:16:58 BoogieIcfgContainer [2023-11-23 21:16:58,373 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:16:58,378 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:16:58,379 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:16:58,382 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:16:58,382 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:16:48" (1/3) ... [2023-11-23 21:16:58,384 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d558480 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:16:58, skipping insertion in model container [2023-11-23 21:16:58,385 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:51" (2/3) ... [2023-11-23 21:16:58,386 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d558480 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:16:58, skipping insertion in model container [2023-11-23 21:16:58,386 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:16:58" (3/3) ... [2023-11-23 21:16:58,387 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i [2023-11-23 21:16:58,413 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:16:58,413 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:16:58,535 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:16:58,543 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;@394d8f8f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:16:58,543 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:16:58,555 INFO L276 IsEmpty]: Start isEmpty. Operand has 816 states, 532 states have (on average 1.381578947368421) internal successors, (735), 558 states have internal predecessors, (735), 235 states have call successors, (235), 49 states have call predecessors, (235), 47 states have return successors, (229), 221 states have call predecessors, (229), 229 states have call successors, (229) [2023-11-23 21:16:58,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-23 21:16:58,583 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:16:58,584 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 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 21:16:58,586 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:16:58,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:16:58,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1938340111, now seen corresponding path program 1 times [2023-11-23 21:16:58,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:16:58,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90133725] [2023-11-23 21:16:58,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:16:58,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:16:58,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:16:59,404 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 21:16:59,407 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:16:59,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90133725] [2023-11-23 21:16:59,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90133725] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:16:59,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:16:59,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:16:59,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927888031] [2023-11-23 21:16:59,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:16:59,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:16:59,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:16:59,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:16:59,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:16:59,482 INFO L87 Difference]: Start difference. First operand has 816 states, 532 states have (on average 1.381578947368421) internal successors, (735), 558 states have internal predecessors, (735), 235 states have call successors, (235), 49 states have call predecessors, (235), 47 states have return successors, (229), 221 states have call predecessors, (229), 229 states have call successors, (229) Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-23 21:17:01,877 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 21:17:03,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:03,554 INFO L93 Difference]: Finished difference Result 2381 states and 3498 transitions. [2023-11-23 21:17:03,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:17:03,557 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 36 [2023-11-23 21:17:03,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:03,585 INFO L225 Difference]: With dead ends: 2381 [2023-11-23 21:17:03,585 INFO L226 Difference]: Without dead ends: 1556 [2023-11-23 21:17:03,595 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 21:17:03,599 INFO L413 NwaCegarLoop]: 1082 mSDtfsCounter, 1130 mSDsluCounter, 1045 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1130 SdHoareTripleChecker+Valid, 2127 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:03,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1130 Valid, 2127 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 238 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2023-11-23 21:17:03,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2023-11-23 21:17:03,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 1556. [2023-11-23 21:17:03,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1556 states, 1024 states have (on average 1.365234375) internal successors, (1398), 1056 states have internal predecessors, (1398), 439 states have call successors, (439), 93 states have call predecessors, (439), 92 states have return successors, (434), 418 states have call predecessors, (434), 434 states have call successors, (434) [2023-11-23 21:17:03,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1556 states to 1556 states and 2271 transitions. [2023-11-23 21:17:03,889 INFO L78 Accepts]: Start accepts. Automaton has 1556 states and 2271 transitions. Word has length 36 [2023-11-23 21:17:03,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:03,890 INFO L495 AbstractCegarLoop]: Abstraction has 1556 states and 2271 transitions. [2023-11-23 21:17:03,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-23 21:17:03,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1556 states and 2271 transitions. [2023-11-23 21:17:03,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-23 21:17:03,905 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:03,906 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:17:03,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:17:03,906 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:03,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:03,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1310578436, now seen corresponding path program 1 times [2023-11-23 21:17:03,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:03,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16706011] [2023-11-23 21:17:03,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:03,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:04,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:04,989 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-23 21:17:04,990 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:04,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16706011] [2023-11-23 21:17:04,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16706011] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:04,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:04,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:17:04,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002752221] [2023-11-23 21:17:04,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:04,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:17:04,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:04,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:17:04,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:04,995 INFO L87 Difference]: Start difference. First operand 1556 states and 2271 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-23 21:17:07,119 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:17:09,753 WARN L539 Checker$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 21:17:11,763 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 21:17:13,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:13,071 INFO L93 Difference]: Finished difference Result 3031 states and 4416 transitions. [2023-11-23 21:17:13,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:17:13,072 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 55 [2023-11-23 21:17:13,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:13,099 INFO L225 Difference]: With dead ends: 3031 [2023-11-23 21:17:13,099 INFO L226 Difference]: Without dead ends: 3028 [2023-11-23 21:17:13,102 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 21:17:13,103 INFO L413 NwaCegarLoop]: 1097 mSDtfsCounter, 1085 mSDsluCounter, 1045 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1085 SdHoareTripleChecker+Valid, 2142 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:13,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1085 Valid, 2142 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 238 Invalid, 3 Unknown, 0 Unchecked, 7.9s Time] [2023-11-23 21:17:13,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3028 states. [2023-11-23 21:17:13,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3028 to 3016. [2023-11-23 21:17:13,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3016 states, 1986 states have (on average 1.364551863041289) internal successors, (2710), 2048 states have internal predecessors, (2710), 847 states have call successors, (847), 185 states have call predecessors, (847), 182 states have return successors, (842), 806 states have call predecessors, (842), 842 states have call successors, (842) [2023-11-23 21:17:13,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 4399 transitions. [2023-11-23 21:17:13,374 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 4399 transitions. Word has length 55 [2023-11-23 21:17:13,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:13,375 INFO L495 AbstractCegarLoop]: Abstraction has 3016 states and 4399 transitions. [2023-11-23 21:17:13,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-23 21:17:13,376 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 4399 transitions. [2023-11-23 21:17:13,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-23 21:17:13,381 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:13,381 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:17:13,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:17:13,382 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:13,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:13,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1973690565, now seen corresponding path program 1 times [2023-11-23 21:17:13,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:13,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690124902] [2023-11-23 21:17:13,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:13,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:13,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:14,151 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-23 21:17:14,152 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:14,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690124902] [2023-11-23 21:17:14,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690124902] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:14,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:14,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:17:14,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432024500] [2023-11-23 21:17:14,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:14,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:17:14,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:14,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:17:14,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:14,160 INFO L87 Difference]: Start difference. First operand 3016 states and 4399 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-23 21:17:16,302 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 21:17:19,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:17:21,102 WARN L539 Checker$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 21:17:22,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:22,380 INFO L93 Difference]: Finished difference Result 9025 states and 13166 transitions. [2023-11-23 21:17:22,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:17:22,381 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 56 [2023-11-23 21:17:22,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:22,426 INFO L225 Difference]: With dead ends: 9025 [2023-11-23 21:17:22,427 INFO L226 Difference]: Without dead ends: 6018 [2023-11-23 21:17:22,440 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 21:17:22,441 INFO L413 NwaCegarLoop]: 1060 mSDtfsCounter, 1140 mSDsluCounter, 1048 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1140 SdHoareTripleChecker+Valid, 2108 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:22,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1140 Valid, 2108 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 229 Invalid, 3 Unknown, 0 Unchecked, 7.8s Time] [2023-11-23 21:17:22,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6018 states. [2023-11-23 21:17:22,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6018 to 6005. [2023-11-23 21:17:22,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6005 states, 3955 states have (on average 1.3643489254108723) internal successors, (5396), 4079 states have internal predecessors, (5396), 1685 states have call successors, (1685), 369 states have call predecessors, (1685), 364 states have return successors, (1680), 1604 states have call predecessors, (1680), 1680 states have call successors, (1680) [2023-11-23 21:17:22,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6005 states to 6005 states and 8761 transitions. [2023-11-23 21:17:22,913 INFO L78 Accepts]: Start accepts. Automaton has 6005 states and 8761 transitions. Word has length 56 [2023-11-23 21:17:22,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:22,916 INFO L495 AbstractCegarLoop]: Abstraction has 6005 states and 8761 transitions. [2023-11-23 21:17:22,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-23 21:17:22,917 INFO L276 IsEmpty]: Start isEmpty. Operand 6005 states and 8761 transitions. [2023-11-23 21:17:22,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-23 21:17:22,921 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:22,921 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:17:22,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:17:22,923 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:22,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:22,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1055325217, now seen corresponding path program 1 times [2023-11-23 21:17:22,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:22,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172007431] [2023-11-23 21:17:22,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:22,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:23,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:23,396 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-23 21:17:23,396 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:23,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172007431] [2023-11-23 21:17:23,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172007431] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:23,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:23,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:17:23,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761651510] [2023-11-23 21:17:23,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:23,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:17:23,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:23,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:17:23,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:23,399 INFO L87 Difference]: Start difference. First operand 6005 states and 8761 transitions. 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-23 21:17:25,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:17:28,333 WARN L539 Checker$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 21:17:30,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:17:31,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:31,450 INFO L93 Difference]: Finished difference Result 8997 states and 13191 transitions. [2023-11-23 21:17:31,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:17:31,451 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 57 [2023-11-23 21:17:31,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:31,520 INFO L225 Difference]: With dead ends: 8997 [2023-11-23 21:17:31,520 INFO L226 Difference]: Without dead ends: 8994 [2023-11-23 21:17:31,525 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 21:17:31,526 INFO L413 NwaCegarLoop]: 1061 mSDtfsCounter, 1134 mSDsluCounter, 1063 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1134 SdHoareTripleChecker+Valid, 2124 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:31,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1134 Valid, 2124 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 226 Invalid, 3 Unknown, 0 Unchecked, 7.7s Time] [2023-11-23 21:17:31,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8994 states. [2023-11-23 21:17:32,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8994 to 8983. [2023-11-23 21:17:32,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8983 states, 5917 states have (on average 1.364711847219875) internal successors, (8075), 6107 states have internal predecessors, (8075), 2519 states have call successors, (2519), 553 states have call predecessors, (2519), 546 states have return successors, (2584), 2394 states have call predecessors, (2584), 2514 states have call successors, (2584) [2023-11-23 21:17:32,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8983 states to 8983 states and 13178 transitions. [2023-11-23 21:17:32,287 INFO L78 Accepts]: Start accepts. Automaton has 8983 states and 13178 transitions. Word has length 57 [2023-11-23 21:17:32,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:32,287 INFO L495 AbstractCegarLoop]: Abstraction has 8983 states and 13178 transitions. [2023-11-23 21:17:32,288 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-23 21:17:32,288 INFO L276 IsEmpty]: Start isEmpty. Operand 8983 states and 13178 transitions. [2023-11-23 21:17:32,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-23 21:17:32,293 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:32,293 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:17:32,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:17:32,293 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:32,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:32,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1644201662, now seen corresponding path program 1 times [2023-11-23 21:17:32,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:32,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607725675] [2023-11-23 21:17:32,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:32,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:32,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:32,631 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-23 21:17:32,631 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:32,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607725675] [2023-11-23 21:17:32,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607725675] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:32,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:32,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:17:32,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975895726] [2023-11-23 21:17:32,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:32,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:17:32,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:32,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:17:32,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:32,636 INFO L87 Difference]: Start difference. First operand 8983 states and 13178 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-23 21:17:34,824 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 21:17:36,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:36,221 INFO L93 Difference]: Finished difference Result 8985 states and 13179 transitions. [2023-11-23 21:17:36,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:17:36,222 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 58 [2023-11-23 21:17:36,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:36,315 INFO L225 Difference]: With dead ends: 8985 [2023-11-23 21:17:36,315 INFO L226 Difference]: Without dead ends: 8982 [2023-11-23 21:17:36,321 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 21:17:36,322 INFO L413 NwaCegarLoop]: 1059 mSDtfsCounter, 1142 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1142 SdHoareTripleChecker+Valid, 1059 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:36,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1142 Valid, 1059 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 114 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2023-11-23 21:17:36,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8982 states. [2023-11-23 21:17:36,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8982 to 8982. [2023-11-23 21:17:36,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8982 states, 5917 states have (on average 1.3645428426567516) internal successors, (8074), 6106 states have internal predecessors, (8074), 2518 states have call successors, (2518), 553 states have call predecessors, (2518), 546 states have return successors, (2584), 2394 states have call predecessors, (2584), 2514 states have call successors, (2584) [2023-11-23 21:17:37,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8982 states to 8982 states and 13176 transitions. [2023-11-23 21:17:37,015 INFO L78 Accepts]: Start accepts. Automaton has 8982 states and 13176 transitions. Word has length 58 [2023-11-23 21:17:37,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:37,016 INFO L495 AbstractCegarLoop]: Abstraction has 8982 states and 13176 transitions. [2023-11-23 21:17:37,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-23 21:17:37,016 INFO L276 IsEmpty]: Start isEmpty. Operand 8982 states and 13176 transitions. [2023-11-23 21:17:37,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-23 21:17:37,018 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:37,019 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:17:37,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:17:37,019 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:37,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:37,020 INFO L85 PathProgramCache]: Analyzing trace with hash -569806142, now seen corresponding path program 1 times [2023-11-23 21:17:37,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:37,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749274477] [2023-11-23 21:17:37,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:37,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:37,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:37,342 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-23 21:17:37,342 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:37,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749274477] [2023-11-23 21:17:37,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749274477] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:37,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:37,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:17:37,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338204204] [2023-11-23 21:17:37,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:37,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:17:37,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:37,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:17:37,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:37,345 INFO L87 Difference]: Start difference. First operand 8982 states and 13176 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7)