./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-43_2a-drivers--scsi--device_handler--scsi_dh_rdac.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b87d58c6-1ab0-430c-955d-132dc5dd2281/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b87d58c6-1ab0-430c-955d-132dc5dd2281/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b87d58c6-1ab0-430c-955d-132dc5dd2281/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b87d58c6-1ab0-430c-955d-132dc5dd2281/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--device_handler--scsi_dh_rdac.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b87d58c6-1ab0-430c-955d-132dc5dd2281/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b87d58c6-1ab0-430c-955d-132dc5dd2281/bin/utaipan-verify-NcY6lQBIFX --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 230b725329634d718374ec3f6d82161758e5d9913588383fdc3e35a9fd1533f5 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:59:28,352 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:59:28,458 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b87d58c6-1ab0-430c-955d-132dc5dd2281/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-12 00:59:28,467 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:59:28,467 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:59:28,515 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:59:28,516 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:59:28,517 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:59:28,518 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:59:28,523 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:59:28,523 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:59:28,524 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:59:28,525 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:59:28,526 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:59:28,527 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:59:28,527 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:59:28,528 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:59:28,528 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:59:28,529 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:59:28,529 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:59:28,529 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:59:28,530 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:59:28,531 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:59:28,532 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:59:28,532 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:59:28,533 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:59:28,533 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:59:28,533 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:59:28,534 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:59:28,534 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:59:28,535 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:59:28,536 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:59:28,536 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:59:28,536 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:59:28,537 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:59:28,537 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:59:28,537 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:59:28,537 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:59:28,537 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:59:28,538 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:59:28,538 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:59:28,540 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:59:28,540 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_b87d58c6-1ab0-430c-955d-132dc5dd2281/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b87d58c6-1ab0-430c-955d-132dc5dd2281/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 230b725329634d718374ec3f6d82161758e5d9913588383fdc3e35a9fd1533f5 [2023-11-12 00:59:28,846 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:59:28,886 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:59:28,889 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:59:28,890 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:59:28,891 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:59:28,892 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b87d58c6-1ab0-430c-955d-132dc5dd2281/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--device_handler--scsi_dh_rdac.ko-entry_point.cil.out.i [2023-11-12 00:59:31,916 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:59:32,498 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:59:32,500 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b87d58c6-1ab0-430c-955d-132dc5dd2281/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--device_handler--scsi_dh_rdac.ko-entry_point.cil.out.i [2023-11-12 00:59:32,549 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b87d58c6-1ab0-430c-955d-132dc5dd2281/bin/utaipan-verify-NcY6lQBIFX/data/a7f5da03c/8344fa685e6942749ffda153149ad9be/FLAG32197401f [2023-11-12 00:59:32,567 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b87d58c6-1ab0-430c-955d-132dc5dd2281/bin/utaipan-verify-NcY6lQBIFX/data/a7f5da03c/8344fa685e6942749ffda153149ad9be [2023-11-12 00:59:32,570 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:59:32,572 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:59:32,577 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:59:32,577 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:59:32,583 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:59:32,584 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:59:32" (1/1) ... [2023-11-12 00:59:32,586 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cdbbffe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:32, skipping insertion in model container [2023-11-12 00:59:32,586 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:59:32" (1/1) ... [2023-11-12 00:59:32,729 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:59:33,798 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_b87d58c6-1ab0-430c-955d-132dc5dd2281/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--device_handler--scsi_dh_rdac.ko-entry_point.cil.out.i[164687,164700] [2023-11-12 00:59:33,843 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:59:33,896 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:59:34,024 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; subl %2, %0; sete %1": "+m" (v->counter), "=qm" (c): "er" (i): "memory"); [4273-4274] [2023-11-12 00:59:34,026 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; xaddb %b0, %1\n": "+q" (__ret), "+m" (v->counter): : "memory", "cc"); [4285-4286] [2023-11-12 00:59:34,027 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; xaddw %w0, %1\n": "+r" (__ret), "+m" (v->counter): : "memory", "cc"); [4289-4290] [2023-11-12 00:59:34,028 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; xaddl %0, %1\n": "+r" (__ret), "+m" (v->counter): : "memory", "cc"); [4293-4294] [2023-11-12 00:59:34,028 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; xaddq %q0, %1\n": "+r" (__ret), "+m" (v->counter): : "memory", "cc"); [4297-4298] [2023-11-12 00:59:34,206 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_b87d58c6-1ab0-430c-955d-132dc5dd2281/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--device_handler--scsi_dh_rdac.ko-entry_point.cil.out.i[164687,164700] [2023-11-12 00:59:34,213 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:59:34,262 WARN L672 CHandler]: The function strncmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:34,263 WARN L672 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:34,263 WARN L672 CHandler]: The function __xadd_wrong_size is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:34,271 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:59:34,271 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:34 WrapperNode [2023-11-12 00:59:34,272 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:59:34,273 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:59:34,273 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:59:34,273 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:59:34,281 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:34" (1/1) ... [2023-11-12 00:59:34,365 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:34" (1/1) ... [2023-11-12 00:59:34,454 INFO L138 Inliner]: procedures = 147, calls = 885, calls flagged for inlining = 61, calls inlined = 59, statements flattened = 2100 [2023-11-12 00:59:34,455 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:59:34,456 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:59:34,456 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:59:34,456 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:59:34,469 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:34" (1/1) ... [2023-11-12 00:59:34,469 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:34" (1/1) ... [2023-11-12 00:59:34,489 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:34" (1/1) ... [2023-11-12 00:59:34,494 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:34" (1/1) ... [2023-11-12 00:59:34,569 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:34" (1/1) ... [2023-11-12 00:59:34,581 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:34" (1/1) ... [2023-11-12 00:59:34,601 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:34" (1/1) ... [2023-11-12 00:59:34,625 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:34" (1/1) ... [2023-11-12 00:59:34,654 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:59:34,656 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:59:34,656 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:59:34,656 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:59:34,657 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:34" (1/1) ... [2023-11-12 00:59:34,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:59:34,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b87d58c6-1ab0-430c-955d-132dc5dd2281/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:34,691 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b87d58c6-1ab0-430c-955d-132dc5dd2281/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:59:34,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b87d58c6-1ab0-430c-955d-132dc5dd2281/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:59:34,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-12 00:59:34,804 INFO L130 BoogieDeclarations]: Found specification of procedure kref_sub [2023-11-12 00:59:34,805 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_sub [2023-11-12 00:59:34,805 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2023-11-12 00:59:34,805 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-12 00:59:34,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-12 00:59:34,805 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-12 00:59:34,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-12 00:59:34,806 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:59:34,806 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-11-12 00:59:34,806 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-11-12 00:59:34,806 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-11-12 00:59:34,807 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-11-12 00:59:34,807 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-12 00:59:34,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-12 00:59:34,808 INFO L130 BoogieDeclarations]: Found specification of procedure get_rdac_data [2023-11-12 00:59:34,808 INFO L138 BoogieDeclarations]: Found implementation of procedure get_rdac_data [2023-11-12 00:59:34,809 INFO L130 BoogieDeclarations]: Found specification of procedure blk_put_request [2023-11-12 00:59:34,809 INFO L138 BoogieDeclarations]: Found implementation of procedure blk_put_request [2023-11-12 00:59:34,810 INFO L130 BoogieDeclarations]: Found specification of procedure activate_work_1 [2023-11-12 00:59:34,810 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_work_1 [2023-11-12 00:59:34,810 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-12 00:59:34,810 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-12 00:59:34,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:59:34,812 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-12 00:59:34,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-12 00:59:34,812 INFO L130 BoogieDeclarations]: Found specification of procedure send_mode_select [2023-11-12 00:59:34,812 INFO L138 BoogieDeclarations]: Found implementation of procedure send_mode_select [2023-11-12 00:59:34,813 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2023-11-12 00:59:34,813 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2023-11-12 00:59:34,813 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-12 00:59:34,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-12 00:59:34,814 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-12 00:59:34,814 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-12 00:59:34,814 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2023-11-12 00:59:34,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2023-11-12 00:59:34,814 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 00:59:34,815 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 00:59:34,815 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 00:59:34,815 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~VOID [2023-11-12 00:59:34,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~VOID [2023-11-12 00:59:34,815 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_unregister_device_handler [2023-11-12 00:59:34,816 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_unregister_device_handler [2023-11-12 00:59:34,816 INFO L130 BoogieDeclarations]: Found specification of procedure ERR_PTR [2023-11-12 00:59:34,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ERR_PTR [2023-11-12 00:59:34,816 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2023-11-12 00:59:34,816 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2023-11-12 00:59:34,817 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:59:34,817 INFO L130 BoogieDeclarations]: Found specification of procedure submit_inquiry [2023-11-12 00:59:34,817 INFO L138 BoogieDeclarations]: Found implementation of procedure submit_inquiry [2023-11-12 00:59:34,817 INFO L130 BoogieDeclarations]: Found specification of procedure rdac_bus_detach [2023-11-12 00:59:34,817 INFO L138 BoogieDeclarations]: Found implementation of procedure rdac_bus_detach [2023-11-12 00:59:34,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:59:34,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 00:59:34,818 INFO L130 BoogieDeclarations]: Found specification of procedure rdac_match [2023-11-12 00:59:34,819 INFO L138 BoogieDeclarations]: Found implementation of procedure rdac_match [2023-11-12 00:59:34,819 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2023-11-12 00:59:34,820 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2023-11-12 00:59:34,820 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2023-11-12 00:59:34,821 INFO L130 BoogieDeclarations]: Found specification of procedure blk_execute_rq [2023-11-12 00:59:34,821 INFO L138 BoogieDeclarations]: Found implementation of procedure blk_execute_rq [2023-11-12 00:59:34,821 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2023-11-12 00:59:34,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2023-11-12 00:59:34,821 INFO L130 BoogieDeclarations]: Found specification of procedure sdev_prefix_printk [2023-11-12 00:59:34,821 INFO L138 BoogieDeclarations]: Found implementation of procedure sdev_prefix_printk [2023-11-12 00:59:34,822 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 00:59:34,822 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2023-11-12 00:59:34,822 INFO L130 BoogieDeclarations]: Found specification of procedure call_and_disable_work_1 [2023-11-12 00:59:34,823 INFO L138 BoogieDeclarations]: Found implementation of procedure call_and_disable_work_1 [2023-11-12 00:59:34,823 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2023-11-12 00:59:34,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2023-11-12 00:59:34,823 INFO L130 BoogieDeclarations]: Found specification of procedure check_ownership [2023-11-12 00:59:34,823 INFO L138 BoogieDeclarations]: Found implementation of procedure check_ownership [2023-11-12 00:59:34,823 INFO L130 BoogieDeclarations]: Found specification of procedure call_and_disable_all_1 [2023-11-12 00:59:34,824 INFO L138 BoogieDeclarations]: Found implementation of procedure call_and_disable_all_1 [2023-11-12 00:59:34,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:59:34,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-12 00:59:34,824 INFO L130 BoogieDeclarations]: Found specification of procedure get_rdac_req [2023-11-12 00:59:34,824 INFO L138 BoogieDeclarations]: Found implementation of procedure get_rdac_req [2023-11-12 00:59:34,824 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-12 00:59:34,825 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-12 00:59:34,826 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2023-11-12 00:59:34,826 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2023-11-12 00:59:34,826 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2023-11-12 00:59:34,826 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2023-11-12 00:59:34,826 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work_on [2023-11-12 00:59:34,827 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work_on [2023-11-12 00:59:34,827 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2023-11-12 00:59:34,827 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2023-11-12 00:59:34,827 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2023-11-12 00:59:34,827 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2023-11-12 00:59:34,827 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2023-11-12 00:59:34,828 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2023-11-12 00:59:34,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:59:34,828 INFO L130 BoogieDeclarations]: Found specification of procedure flush_workqueue [2023-11-12 00:59:34,828 INFO L138 BoogieDeclarations]: Found implementation of procedure flush_workqueue [2023-11-12 00:59:34,828 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-12 00:59:34,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:59:34,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:59:34,829 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2023-11-12 00:59:34,829 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2023-11-12 00:59:35,320 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:59:35,323 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:59:35,727 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-12 00:59:37,380 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:59:38,131 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:59:38,131 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-12 00:59:38,135 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:59:38 BoogieIcfgContainer [2023-11-12 00:59:38,135 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:59:38,139 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:59:38,139 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:59:38,142 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:59:38,143 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:59:32" (1/3) ... [2023-11-12 00:59:38,143 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73d1307 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:59:38, skipping insertion in model container [2023-11-12 00:59:38,144 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:34" (2/3) ... [2023-11-12 00:59:38,144 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73d1307 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:59:38, skipping insertion in model container [2023-11-12 00:59:38,144 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:59:38" (3/3) ... [2023-11-12 00:59:38,146 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--device_handler--scsi_dh_rdac.ko-entry_point.cil.out.i [2023-11-12 00:59:38,167 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:59:38,167 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:59:38,236 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:59:38,244 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;@40fd9826, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:59:38,244 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:59:38,252 INFO L276 IsEmpty]: Start isEmpty. Operand has 458 states, 291 states have (on average 1.3917525773195876) internal successors, (405), 311 states have internal predecessors, (405), 125 states have call successors, (125), 41 states have call predecessors, (125), 40 states have return successors, (121), 120 states have call predecessors, (121), 121 states have call successors, (121) [2023-11-12 00:59:38,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-12 00:59:38,268 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:38,269 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2023-11-12 00:59:38,269 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:38,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:38,275 INFO L85 PathProgramCache]: Analyzing trace with hash 912159119, now seen corresponding path program 1 times [2023-11-12 00:59:38,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:38,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802350128] [2023-11-12 00:59:38,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:38,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:38,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:38,972 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-12 00:59:38,972 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:38,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802350128] [2023-11-12 00:59:38,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802350128] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:38,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:38,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:59:38,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701287361] [2023-11-12 00:59:38,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:38,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:59:38,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:39,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:59:39,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:59:39,016 INFO L87 Difference]: Start difference. First operand has 458 states, 291 states have (on average 1.3917525773195876) internal successors, (405), 311 states have internal predecessors, (405), 125 states have call successors, (125), 41 states have call predecessors, (125), 40 states have return successors, (121), 120 states have call predecessors, (121), 121 states have call successors, (121) Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-12 00:59:40,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:40,156 INFO L93 Difference]: Finished difference Result 1117 states and 1579 transitions. [2023-11-12 00:59:40,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:59:40,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 56 [2023-11-12 00:59:40,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:40,182 INFO L225 Difference]: With dead ends: 1117 [2023-11-12 00:59:40,182 INFO L226 Difference]: Without dead ends: 621 [2023-11-12 00:59:40,193 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 [2023-11-12 00:59:40,196 INFO L413 NwaCegarLoop]: 650 mSDtfsCounter, 293 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 1178 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:40,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 1178 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 00:59:40,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2023-11-12 00:59:40,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 617. [2023-11-12 00:59:40,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 400 states have (on average 1.365) internal successors, (546), 416 states have internal predecessors, (546), 156 states have call successors, (156), 61 states have call predecessors, (156), 60 states have return successors, (155), 154 states have call predecessors, (155), 155 states have call successors, (155) [2023-11-12 00:59:40,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 857 transitions. [2023-11-12 00:59:40,316 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 857 transitions. Word has length 56 [2023-11-12 00:59:40,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:40,317 INFO L495 AbstractCegarLoop]: Abstraction has 617 states and 857 transitions. [2023-11-12 00:59:40,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-12 00:59:40,317 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 857 transitions. [2023-11-12 00:59:40,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-12 00:59:40,324 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:40,324 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:40,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:59:40,325 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:40,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:40,325 INFO L85 PathProgramCache]: Analyzing trace with hash -367421722, now seen corresponding path program 1 times [2023-11-12 00:59:40,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:40,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153055207] [2023-11-12 00:59:40,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:40,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:40,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:40,674 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-12 00:59:40,674 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:40,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153055207] [2023-11-12 00:59:40,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153055207] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:40,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:40,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:59:40,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530438040] [2023-11-12 00:59:40,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:40,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:59:40,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:40,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:59:40,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:59:40,678 INFO L87 Difference]: Start difference. First operand 617 states and 857 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-12 00:59:41,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:41,903 INFO L93 Difference]: Finished difference Result 1221 states and 1698 transitions. [2023-11-12 00:59:41,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:59:41,904 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 84 [2023-11-12 00:59:41,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:41,912 INFO L225 Difference]: With dead ends: 1221 [2023-11-12 00:59:41,913 INFO L226 Difference]: Without dead ends: 621 [2023-11-12 00:59:41,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:59:41,918 INFO L413 NwaCegarLoop]: 548 mSDtfsCounter, 4 mSDsluCounter, 1085 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1633 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:41,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 1633 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-12 00:59:41,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2023-11-12 00:59:41,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 619. [2023-11-12 00:59:41,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 402 states have (on average 1.36318407960199) internal successors, (548), 418 states have internal predecessors, (548), 156 states have call successors, (156), 61 states have call predecessors, (156), 60 states have return successors, (155), 154 states have call predecessors, (155), 155 states have call successors, (155) [2023-11-12 00:59:41,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 859 transitions. [2023-11-12 00:59:41,974 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 859 transitions. Word has length 84 [2023-11-12 00:59:41,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:41,975 INFO L495 AbstractCegarLoop]: Abstraction has 619 states and 859 transitions. [2023-11-12 00:59:41,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-12 00:59:41,975 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 859 transitions. [2023-11-12 00:59:41,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-12 00:59:41,981 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:41,981 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:41,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:59:41,982 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:41,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:41,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1822212511, now seen corresponding path program 1 times [2023-11-12 00:59:41,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:41,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568459737] [2023-11-12 00:59:41,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:41,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:42,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:42,563 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-11-12 00:59:42,563 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:42,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568459737] [2023-11-12 00:59:42,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568459737] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:42,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:42,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:59:42,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229065094] [2023-11-12 00:59:42,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:42,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:59:42,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:42,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:59:42,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:59:42,567 INFO L87 Difference]: Start difference. First operand 619 states and 859 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 3 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-12 00:59:43,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:43,550 INFO L93 Difference]: Finished difference Result 705 states and 971 transitions. [2023-11-12 00:59:43,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:59:43,552 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 3 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 87 [2023-11-12 00:59:43,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:43,559 INFO L225 Difference]: With dead ends: 705 [2023-11-12 00:59:43,559 INFO L226 Difference]: Without dead ends: 702 [2023-11-12 00:59:43,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:59:43,562 INFO L413 NwaCegarLoop]: 557 mSDtfsCounter, 492 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 1288 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:43,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [492 Valid, 1288 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-12 00:59:43,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2023-11-12 00:59:43,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 685. [2023-11-12 00:59:43,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 438 states have (on average 1.360730593607306) internal successors, (596), 462 states have internal predecessors, (596), 173 states have call successors, (173), 76 states have call predecessors, (173), 73 states have return successors, (177), 165 states have call predecessors, (177), 172 states have call successors, (177) [2023-11-12 00:59:43,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 946 transitions. [2023-11-12 00:59:43,645 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 946 transitions. Word has length 87 [2023-11-12 00:59:43,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:43,646 INFO L495 AbstractCegarLoop]: Abstraction has 685 states and 946 transitions. [2023-11-12 00:59:43,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 3 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-12 00:59:43,646 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 946 transitions. [2023-11-12 00:59:43,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-11-12 00:59:43,660 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:43,661 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:43,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:59:43,661 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:43,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:43,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1814030230, now seen corresponding path program 1 times [2023-11-12 00:59:43,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:43,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355250188] [2023-11-12 00:59:43,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:43,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:43,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:44,454 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2023-11-12 00:59:44,454 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:44,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355250188] [2023-11-12 00:59:44,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355250188] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:59:44,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736535100] [2023-11-12 00:59:44,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:44,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:44,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b87d58c6-1ab0-430c-955d-132dc5dd2281/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:44,466 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b87d58c6-1ab0-430c-955d-132dc5dd2281/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:59:44,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b87d58c6-1ab0-430c-955d-132dc5dd2281/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:59:45,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:45,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 2462 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 00:59:45,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:59:45,476 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-11-12 00:59:45,476 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:59:45,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736535100] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:45,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:59:45,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2023-11-12 00:59:45,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389811303] [2023-11-12 00:59:45,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:45,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:59:45,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:45,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:59:45,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-12 00:59:45,481 INFO L87 Difference]: Start difference. First operand 685 states and 946 transitions. Second operand has 6 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 3 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) [2023-11-12 00:59:47,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:47,557 INFO L93 Difference]: Finished difference Result 1359 states and 1881 transitions. [2023-11-12 00:59:47,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:59:47,558 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 3 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) Word has length 166 [2023-11-12 00:59:47,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:47,566 INFO L225 Difference]: With dead ends: 1359 [2023-11-12 00:59:47,566 INFO L226 Difference]: Without dead ends: 691 [2023-11-12 00:59:47,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-11-12 00:59:47,583 INFO L413 NwaCegarLoop]: 545 mSDtfsCounter, 5 mSDsluCounter, 2167 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 2712 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:47,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 2712 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-12 00:59:47,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2023-11-12 00:59:47,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 689. [2023-11-12 00:59:47,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 441 states have (on average 1.3582766439909297) internal successors, (599), 464 states have internal predecessors, (599), 173 states have call successors, (173), 76 states have call predecessors, (173), 74 states have return successors, (181), 166 states have call predecessors, (181), 172 states have call successors, (181) [2023-11-12 00:59:47,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 953 transitions. [2023-11-12 00:59:47,648 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 953 transitions. Word has length 166 [2023-11-12 00:59:47,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:47,650 INFO L495 AbstractCegarLoop]: Abstraction has 689 states and 953 transitions. [2023-11-12 00:59:47,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 3 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) [2023-11-12 00:59:47,651 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 953 transitions. [2023-11-12 00:59:47,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-11-12 00:59:47,657 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:47,658 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:47,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b87d58c6-1ab0-430c-955d-132dc5dd2281/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:59:47,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b87d58c6-1ab0-430c-955d-132dc5dd2281/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:47,869 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:47,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:47,870 INFO L85 PathProgramCache]: Analyzing trace with hash 958336459, now seen corresponding path program 1 times [2023-11-12 00:59:47,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:47,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132660256] [2023-11-12 00:59:47,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:47,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:48,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:48,685 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2023-11-12 00:59:48,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:48,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132660256] [2023-11-12 00:59:48,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132660256] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:59:48,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096013444] [2023-11-12 00:59:48,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:48,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:48,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b87d58c6-1ab0-430c-955d-132dc5dd2281/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:48,691 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b87d58c6-1ab0-430c-955d-132dc5dd2281/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:59:48,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b87d58c6-1ab0-430c-955d-132dc5dd2281/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:59:49,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:49,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 2454 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 00:59:49,483 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:59:49,596 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-11-12 00:59:49,596 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:59:49,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096013444] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:49,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:59:49,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2023-11-12 00:59:49,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132640071] [2023-11-12 00:59:49,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:49,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 00:59:49,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:49,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 00:59:49,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-11-12 00:59:49,600 INFO L87 Difference]: Start difference. First operand 689 states and 953 transitions. Second operand has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 3 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) [2023-11-12 00:59:52,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:52,427 INFO L93 Difference]: Finished difference Result 1542 states and 2173 transitions. [2023-11-12 00:59:52,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 00:59:52,428 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 3 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) Word has length 166 [2023-11-12 00:59:52,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:52,437 INFO L225 Difference]: With dead ends: 1542 [2023-11-12 00:59:52,437 INFO L226 Difference]: Without dead ends: 870 [2023-11-12 00:59:52,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-11-12 00:59:52,444 INFO L413 NwaCegarLoop]: 730 mSDtfsCounter, 160 mSDsluCounter, 4196 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 4926 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:52,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 4926 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-11-12 00:59:52,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2023-11-12 00:59:52,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 692. [2023-11-12 00:59:52,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 444 states have (on average 1.3558558558558558) internal successors, (602), 467 states have internal predecessors, (602), 173 states have call successors, (173), 76 states have call predecessors, (173), 74 states have return successors, (181), 166 states have call predecessors, (181), 172 states have call successors, (181) [2023-11-12 00:59:52,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 956 transitions. [2023-11-12 00:59:52,499 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 956 transitions. Word has length 166 [2023-11-12 00:59:52,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:52,501 INFO L495 AbstractCegarLoop]: Abstraction has 692 states and 956 transitions. [2023-11-12 00:59:52,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 3 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) [2023-11-12 00:59:52,501 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 956 transitions. [2023-11-12 00:59:52,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-11-12 00:59:52,509 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:52,509 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:52,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b87d58c6-1ab0-430c-955d-132dc5dd2281/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:59:52,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b87d58c6-1ab0-430c-955d-132dc5dd2281/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:52,732 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:52,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:52,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1063019191, now seen corresponding path program 1 times [2023-11-12 00:59:52,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:52,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843410457] [2023-11-12 00:59:52,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:52,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:52,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:53,292 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2023-11-12 00:59:53,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:53,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843410457] [2023-11-12 00:59:53,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843410457] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:53,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:53,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:59:53,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126763873] [2023-11-12 00:59:53,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:53,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:59:53,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:53,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:59:53,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:59:53,296 INFO L87 Difference]: Start difference. First operand 692 states and 956 transitions. Second operand has 6 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 3 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) [2023-11-12 00:59:54,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:54,933 INFO L93 Difference]: Finished difference Result 1370 states and 1895 transitions. [2023-11-12 00:59:54,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:59:54,934 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 3 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) Word has length 178 [2023-11-12 00:59:54,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:54,940 INFO L225 Difference]: With dead ends: 1370 [2023-11-12 00:59:54,941 INFO L226 Difference]: Without dead ends: 695 [2023-11-12 00:59:54,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:59:54,946 INFO L413 NwaCegarLoop]: 546 mSDtfsCounter, 4 mSDsluCounter, 2174 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2720 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:54,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 2720 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-12 00:59:54,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2023-11-12 00:59:54,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 694. [2023-11-12 00:59:54,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 446 states have (on average 1.3542600896860986) internal successors, (604), 468 states have internal predecessors, (604), 173 states have call successors, (173), 76 states have call predecessors, (173), 74 states have return successors, (181), 167 states have call predecessors, (181), 172 states have call successors, (181) [2023-11-12 00:59:54,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 958 transitions. [2023-11-12 00:59:54,987 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 958 transitions. Word has length 178 [2023-11-12 00:59:54,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:54,988 INFO L495 AbstractCegarLoop]: Abstraction has 694 states and 958 transitions. [2023-11-12 00:59:54,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 3 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) [2023-11-12 00:59:54,988 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 958 transitions. [2023-11-12 00:59:54,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2023-11-12 00:59:54,995 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:54,996 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:54,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 00:59:54,996 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:54,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:54,997 INFO L85 PathProgramCache]: Analyzing trace with hash -543124957, now seen corresponding path program 1 times [2023-11-12 00:59:54,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:54,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234543839] [2023-11-12 00:59:54,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:54,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:55,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:56,520 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2023-11-12 00:59:56,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:56,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234543839] [2023-11-12 00:59:56,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234543839] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:59:56,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054101551] [2023-11-12 00:59:56,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:56,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:56,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b87d58c6-1ab0-430c-955d-132dc5dd2281/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:56,523 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b87d58c6-1ab0-430c-955d-132dc5dd2281/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:59:56,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b87d58c6-1ab0-430c-955d-132dc5dd2281/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:59:57,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:57,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 2762 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-12 00:59:57,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:59:57,557 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-12 00:59:57,557 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:59:57,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054101551] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:57,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:59:57,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-11-12 00:59:57,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957474119] [2023-11-12 00:59:57,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:57,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:59:57,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:57,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:59:57,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:59:57,561 INFO L87 Difference]: Start difference. First operand 694 states and 958 transitions. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2023-11-12 00:59:59,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:59,738 INFO L93 Difference]: Finished difference Result 1553 states and 2184 transitions. [2023-11-12 00:59:59,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:59:59,739 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 190 [2023-11-12 00:59:59,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:59,747 INFO L225 Difference]: With dead ends: 1553 [2023-11-12 00:59:59,748 INFO L226 Difference]: Without dead ends: 876 [2023-11-12 00:59:59,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-12 00:59:59,753 INFO L413 NwaCegarLoop]: 732 mSDtfsCounter, 160 mSDsluCounter, 2012 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 2744 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:59,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 2744 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-12 00:59:59,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2023-11-12 00:59:59,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 694. [2023-11-12 00:59:59,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 446 states have (on average 1.3542600896860986) internal successors, (604), 468 states have internal predecessors, (604), 173 states have call successors, (173), 76 states have call predecessors, (173), 74 states have return successors, (181), 167 states have call predecessors, (181), 172 states have call successors, (181) [2023-11-12 00:59:59,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 958 transitions. [2023-11-12 00:59:59,800 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 958 transitions. Word has length 190 [2023-11-12 00:59:59,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:59,801 INFO L495 AbstractCegarLoop]: Abstraction has 694 states and 958 transitions. [2023-11-12 00:59:59,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2023-11-12 00:59:59,801 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 958 transitions. [2023-11-12 00:59:59,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2023-11-12 00:59:59,808 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:59,809 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:59,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b87d58c6-1ab0-430c-955d-132dc5dd2281/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 01:00:00,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b87d58c6-1ab0-430c-955d-132dc5dd2281/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:00,026 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:00:00,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:00,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1806228324, now seen corresponding path program 1 times [2023-11-12 01:00:00,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:00,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007541994] [2023-11-12 01:00:00,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:00,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:00,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:00,505 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-11-12 01:00:00,506 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:00,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007541994] [2023-11-12 01:00:00,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007541994] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:00:00,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:00:00,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 01:00:00,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033566422] [2023-11-12 01:00:00,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:00:00,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:00:00,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:00,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:00:00,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:00:00,509 INFO L87 Difference]: Start difference. First operand 694 states and 958 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-12 01:00:01,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:01,118 INFO L93 Difference]: Finished difference Result 1372 states and 1897 transitions. [2023-11-12 01:00:01,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:00:01,119 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 204 [2023-11-12 01:00:01,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:01,124 INFO L225 Difference]: With dead ends: 1372 [2023-11-12 01:00:01,124 INFO L226 Difference]: Without dead ends: 695 [2023-11-12 01:00:01,129 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 [2023-11-12 01:00:01,129 INFO L413 NwaCegarLoop]: 548 mSDtfsCounter, 0 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1092 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:01,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1092 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 01:00:01,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2023-11-12 01:00:01,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 695. [2023-11-12 01:00:01,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 447 states have (on average 1.3534675615212528) internal successors, (605), 469 states have internal predecessors, (605), 173 states have call successors, (173), 76 states have call predecessors, (173), 74 states have return successors, (181), 167 states have call predecessors, (181), 172 states have call successors, (181) [2023-11-12 01:00:01,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 959 transitions. [2023-11-12 01:00:01,172 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 959 transitions. Word has length 204 [2023-11-12 01:00:01,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:01,172 INFO L495 AbstractCegarLoop]: Abstraction has 695 states and 959 transitions. [2023-11-12 01:00:01,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-12 01:00:01,173 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 959 transitions. [2023-11-12 01:00:01,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2023-11-12 01:00:01,185 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:01,185 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:00:01,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 01:00:01,185 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:00:01,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:01,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1537339670, now seen corresponding path program 1 times [2023-11-12 01:00:01,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:01,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776866569] [2023-11-12 01:00:01,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:01,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:01,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:01,632 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-11-12 01:00:01,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:01,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776866569] [2023-11-12 01:00:01,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776866569] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:00:01,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202688440] [2023-11-12 01:00:01,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:01,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:01,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b87d58c6-1ab0-430c-955d-132dc5dd2281/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:00:01,635 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b87d58c6-1ab0-430c-955d-132dc5dd2281/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:00:01,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b87d58c6-1ab0-430c-955d-132dc5dd2281/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 01:00:02,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:02,643 INFO L262 TraceCheckSpWp]: Trace formula consists of 2880 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 01:00:02,654 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:00:02,685 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 57 proven. 1 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-12 01:00:02,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:00:02,892 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-11-12 01:00:02,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202688440] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:00:02,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [468885203] [2023-11-12 01:00:02,928 INFO L159 IcfgInterpreter]: Started Sifa with 118 locations of interest [2023-11-12 01:00:02,929 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:00:02,934 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:00:02,940 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:00:02,941 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs