./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-08_1a-drivers--md--md-cluster.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_af0e26c5-2d40-4d98-affe-c538bdfb4b51/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af0e26c5-2d40-4d98-affe-c538bdfb4b51/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_af0e26c5-2d40-4d98-affe-c538bdfb4b51/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af0e26c5-2d40-4d98-affe-c538bdfb4b51/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--md--md-cluster.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af0e26c5-2d40-4d98-affe-c538bdfb4b51/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_af0e26c5-2d40-4d98-affe-c538bdfb4b51/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 03d5d1a576959110e79c00ca2825754bce7439905d85699b470a90adbbee10ad --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:47:48,731 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:47:48,841 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af0e26c5-2d40-4d98-affe-c538bdfb4b51/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-12 00:47:48,846 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:47:48,847 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:47:48,877 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:47:48,878 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:47:48,878 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:47:48,879 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:47:48,880 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:47:48,880 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:47:48,881 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:47:48,882 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:47:48,882 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:47:48,883 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:47:48,883 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:47:48,884 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:47:48,884 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:47:48,885 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:47:48,885 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:47:48,886 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:47:48,892 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:47:48,892 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:47:48,893 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:47:48,894 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:47:48,894 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:47:48,895 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:47:48,895 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:47:48,895 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:47:48,896 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:47:48,897 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:47:48,898 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:47:48,898 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:47:48,898 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:47:48,898 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:47:48,899 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:47:48,899 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:47:48,899 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:47:48,900 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:47:48,900 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:47:48,900 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:47:48,900 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:47:48,901 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_af0e26c5-2d40-4d98-affe-c538bdfb4b51/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af0e26c5-2d40-4d98-affe-c538bdfb4b51/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 03d5d1a576959110e79c00ca2825754bce7439905d85699b470a90adbbee10ad [2023-11-12 00:47:49,199 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:47:49,233 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:47:49,236 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:47:49,238 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:47:49,238 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:47:49,240 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af0e26c5-2d40-4d98-affe-c538bdfb4b51/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--md--md-cluster.ko-entry_point.cil.out.i [2023-11-12 00:47:52,528 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:47:53,034 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:47:53,039 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af0e26c5-2d40-4d98-affe-c538bdfb4b51/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--md--md-cluster.ko-entry_point.cil.out.i [2023-11-12 00:47:53,086 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af0e26c5-2d40-4d98-affe-c538bdfb4b51/bin/utaipan-verify-NcY6lQBIFX/data/644aa67a1/bcd3a3c7f5df4242b739ec8e6ef46594/FLAG4ed5a5d67 [2023-11-12 00:47:53,104 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af0e26c5-2d40-4d98-affe-c538bdfb4b51/bin/utaipan-verify-NcY6lQBIFX/data/644aa67a1/bcd3a3c7f5df4242b739ec8e6ef46594 [2023-11-12 00:47:53,114 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:47:53,117 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:47:53,118 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:47:53,119 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:47:53,124 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:47:53,125 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:47:53" (1/1) ... [2023-11-12 00:47:53,127 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@546b88b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:53, skipping insertion in model container [2023-11-12 00:47:53,127 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:47:53" (1/1) ... [2023-11-12 00:47:53,254 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:47:54,558 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_af0e26c5-2d40-4d98-affe-c538bdfb4b51/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--md--md-cluster.ko-entry_point.cil.out.i[164960,164973] [2023-11-12 00:47:54,614 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:47:54,636 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:47:54,739 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; bts %1,%0": "+m" (*((long volatile *)addr)): "Ir" (nr): "memory"); [4160] [2023-11-12 00:47:54,741 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; btr %1,%0": "+m" (*((long volatile *)addr)): "Ir" (nr)); [4167] [2023-11-12 00:47:54,744 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("bsrq %1,%q0": "+r" (bitpos): "rm" (x)); [4182] [2023-11-12 00:47:55,056 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_af0e26c5-2d40-4d98-affe-c538bdfb4b51/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--md--md-cluster.ko-entry_point.cil.out.i[164960,164973] [2023-11-12 00:47:55,066 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:47:55,138 WARN L672 CHandler]: The function sprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:47:55,147 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:47:55,148 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:55 WrapperNode [2023-11-12 00:47:55,148 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:47:55,149 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:47:55,151 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:47:55,151 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:47:55,159 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:55" (1/1) ... [2023-11-12 00:47:55,226 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:55" (1/1) ... [2023-11-12 00:47:55,355 INFO L138 Inliner]: procedures = 151, calls = 834, calls flagged for inlining = 67, calls inlined = 53, statements flattened = 1829 [2023-11-12 00:47:55,355 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:47:55,357 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:47:55,357 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:47:55,357 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:47:55,367 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:55" (1/1) ... [2023-11-12 00:47:55,367 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:55" (1/1) ... [2023-11-12 00:47:55,391 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:55" (1/1) ... [2023-11-12 00:47:55,395 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:55" (1/1) ... [2023-11-12 00:47:55,494 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:55" (1/1) ... [2023-11-12 00:47:55,506 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:55" (1/1) ... [2023-11-12 00:47:55,533 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:55" (1/1) ... [2023-11-12 00:47:55,544 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:55" (1/1) ... [2023-11-12 00:47:55,601 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:47:55,602 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:47:55,602 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:47:55,603 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:47:55,604 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:55" (1/1) ... [2023-11-12 00:47:55,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:47:55,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af0e26c5-2d40-4d98-affe-c538bdfb4b51/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:47:55,637 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af0e26c5-2d40-4d98-affe-c538bdfb4b51/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:47:55,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af0e26c5-2d40-4d98-affe-c538bdfb4b51/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:47:55,691 INFO L130 BoogieDeclarations]: Found specification of procedure dlm_lock_sync [2023-11-12 00:47:55,691 INFO L138 BoogieDeclarations]: Found implementation of procedure dlm_lock_sync [2023-11-12 00:47:55,691 INFO L130 BoogieDeclarations]: Found specification of procedure lockres_free [2023-11-12 00:47:55,692 INFO L138 BoogieDeclarations]: Found implementation of procedure lockres_free [2023-11-12 00:47:55,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-12 00:47:55,694 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-12 00:47:55,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-12 00:47:55,695 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-12 00:47:55,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-12 00:47:55,695 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:47:55,695 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-11-12 00:47:55,696 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-11-12 00:47:55,696 INFO L130 BoogieDeclarations]: Found specification of procedure dlm_release_lockspace [2023-11-12 00:47:55,696 INFO L138 BoogieDeclarations]: Found implementation of procedure dlm_release_lockspace [2023-11-12 00:47:55,696 INFO L130 BoogieDeclarations]: Found specification of procedure lock_comm [2023-11-12 00:47:55,696 INFO L138 BoogieDeclarations]: Found implementation of procedure lock_comm [2023-11-12 00:47:55,697 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-11-12 00:47:55,698 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-11-12 00:47:55,698 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-12 00:47:55,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-12 00:47:55,698 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2023-11-12 00:47:55,699 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2023-11-12 00:47:55,699 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put [2023-11-12 00:47:55,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put [2023-11-12 00:47:55,700 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-12 00:47:55,700 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-12 00:47:55,701 INFO L130 BoogieDeclarations]: Found specification of procedure init_completion [2023-11-12 00:47:55,701 INFO L138 BoogieDeclarations]: Found implementation of procedure init_completion [2023-11-12 00:47:55,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:47:55,702 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-12 00:47:55,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-12 00:47:55,703 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2023-11-12 00:47:55,704 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2023-11-12 00:47:55,704 INFO L130 BoogieDeclarations]: Found specification of procedure md_wakeup_thread [2023-11-12 00:47:55,705 INFO L138 BoogieDeclarations]: Found implementation of procedure md_wakeup_thread [2023-11-12 00:47:55,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-12 00:47:55,706 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-12 00:47:55,707 INFO L130 BoogieDeclarations]: Found specification of procedure bitmap_copy_from_slot [2023-11-12 00:47:55,707 INFO L138 BoogieDeclarations]: Found implementation of procedure bitmap_copy_from_slot [2023-11-12 00:47:55,707 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2023-11-12 00:47:55,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2023-11-12 00:47:55,712 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 00:47:55,712 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 00:47:55,713 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 00:47:55,713 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2023-11-12 00:47:55,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2023-11-12 00:47:55,713 INFO L130 BoogieDeclarations]: Found specification of procedure complete [2023-11-12 00:47:55,713 INFO L138 BoogieDeclarations]: Found implementation of procedure complete [2023-11-12 00:47:55,714 INFO L130 BoogieDeclarations]: Found specification of procedure md_register_thread [2023-11-12 00:47:55,714 INFO L138 BoogieDeclarations]: Found implementation of procedure md_register_thread [2023-11-12 00:47:55,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:47:55,714 INFO L130 BoogieDeclarations]: Found specification of procedure md_unregister_thread [2023-11-12 00:47:55,714 INFO L138 BoogieDeclarations]: Found implementation of procedure md_unregister_thread [2023-11-12 00:47:55,715 INFO L130 BoogieDeclarations]: Found specification of procedure wait_for_completion [2023-11-12 00:47:55,715 INFO L138 BoogieDeclarations]: Found implementation of procedure wait_for_completion [2023-11-12 00:47:55,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:47:55,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 00:47:55,716 INFO L130 BoogieDeclarations]: Found specification of procedure sprintf [2023-11-12 00:47:55,716 INFO L130 BoogieDeclarations]: Found specification of procedure resync_send [2023-11-12 00:47:55,716 INFO L138 BoogieDeclarations]: Found implementation of procedure resync_send [2023-11-12 00:47:55,717 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2023-11-12 00:47:55,718 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2023-11-12 00:47:55,718 INFO L130 BoogieDeclarations]: Found specification of procedure lockres_init [2023-11-12 00:47:55,718 INFO L138 BoogieDeclarations]: Found implementation of procedure lockres_init [2023-11-12 00:47:55,719 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 00:47:55,719 INFO L130 BoogieDeclarations]: Found specification of procedure unlock_comm [2023-11-12 00:47:55,719 INFO L138 BoogieDeclarations]: Found implementation of procedure unlock_comm [2023-11-12 00:47:55,719 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2023-11-12 00:47:55,719 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2023-11-12 00:47:55,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:47:55,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-12 00:47:55,720 INFO L130 BoogieDeclarations]: Found specification of procedure resync_info_update [2023-11-12 00:47:55,720 INFO L138 BoogieDeclarations]: Found implementation of procedure resync_info_update [2023-11-12 00:47:55,721 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-12 00:47:55,721 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-12 00:47:55,721 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2023-11-12 00:47:55,721 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2023-11-12 00:47:55,721 INFO L130 BoogieDeclarations]: Found specification of procedure __sendmsg [2023-11-12 00:47:55,722 INFO L138 BoogieDeclarations]: Found implementation of procedure __sendmsg [2023-11-12 00:47:55,722 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2023-11-12 00:47:55,722 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2023-11-12 00:47:55,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:47:55,722 INFO L130 BoogieDeclarations]: Found specification of procedure pretty_uuid [2023-11-12 00:47:55,722 INFO L138 BoogieDeclarations]: Found implementation of procedure pretty_uuid [2023-11-12 00:47:55,723 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-12 00:47:55,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:47:55,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:47:55,726 INFO L130 BoogieDeclarations]: Found specification of procedure sendmsg [2023-11-12 00:47:55,726 INFO L138 BoogieDeclarations]: Found implementation of procedure sendmsg [2023-11-12 00:47:55,727 INFO L130 BoogieDeclarations]: Found specification of procedure dlm_unlock_sync [2023-11-12 00:47:55,727 INFO L138 BoogieDeclarations]: Found implementation of procedure dlm_unlock_sync [2023-11-12 00:47:56,138 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:47:56,142 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:47:56,321 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-12 00:47:57,829 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:47:58,248 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:47:58,248 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 00:47:58,256 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:47:58 BoogieIcfgContainer [2023-11-12 00:47:58,256 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:47:58,261 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:47:58,261 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:47:58,265 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:47:58,265 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:47:53" (1/3) ... [2023-11-12 00:47:58,267 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@277e30a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:47:58, skipping insertion in model container [2023-11-12 00:47:58,267 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:55" (2/3) ... [2023-11-12 00:47:58,268 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@277e30a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:47:58, skipping insertion in model container [2023-11-12 00:47:58,268 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:47:58" (3/3) ... [2023-11-12 00:47:58,269 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--md--md-cluster.ko-entry_point.cil.out.i [2023-11-12 00:47:58,290 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:47:58,290 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:47:58,381 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:47:58,390 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;@bd2701d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:47:58,390 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:47:58,400 INFO L276 IsEmpty]: Start isEmpty. Operand has 525 states, 331 states have (on average 1.3413897280966767) internal successors, (444), 342 states have internal predecessors, (444), 156 states have call successors, (156), 37 states have call predecessors, (156), 36 states have return successors, (152), 151 states have call predecessors, (152), 152 states have call successors, (152) [2023-11-12 00:47:58,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-11-12 00:47:58,422 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:58,424 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 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, 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 00:47:58,424 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:58,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:58,432 INFO L85 PathProgramCache]: Analyzing trace with hash 702854034, now seen corresponding path program 1 times [2023-11-12 00:47:58,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:58,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784471050] [2023-11-12 00:47:58,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:58,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:58,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:59,469 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2023-11-12 00:47:59,470 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:59,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784471050] [2023-11-12 00:47:59,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784471050] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:47:59,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:47:59,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:47:59,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948913551] [2023-11-12 00:47:59,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:47:59,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:47:59,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:59,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:47:59,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:47:59,559 INFO L87 Difference]: Start difference. First operand has 525 states, 331 states have (on average 1.3413897280966767) internal successors, (444), 342 states have internal predecessors, (444), 156 states have call successors, (156), 37 states have call predecessors, (156), 36 states have return successors, (152), 151 states have call predecessors, (152), 152 states have call successors, (152) Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-12 00:48:00,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:48:00,964 INFO L93 Difference]: Finished difference Result 1483 states and 2133 transitions. [2023-11-12 00:48:00,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:48:00,967 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) Word has length 146 [2023-11-12 00:48:00,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:48:01,003 INFO L225 Difference]: With dead ends: 1483 [2023-11-12 00:48:01,004 INFO L226 Difference]: Without dead ends: 979 [2023-11-12 00:48:01,016 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 00:48:01,027 INFO L413 NwaCegarLoop]: 680 mSDtfsCounter, 670 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 1346 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:48:01,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [670 Valid, 1346 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-12 00:48:01,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2023-11-12 00:48:01,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 976. [2023-11-12 00:48:01,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 628 states have (on average 1.3343949044585988) internal successors, (838), 637 states have internal predecessors, (838), 280 states have call successors, (280), 68 states have call predecessors, (280), 67 states have return successors, (278), 276 states have call predecessors, (278), 278 states have call successors, (278) [2023-11-12 00:48:01,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 1396 transitions. [2023-11-12 00:48:01,246 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 1396 transitions. Word has length 146 [2023-11-12 00:48:01,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:48:01,250 INFO L495 AbstractCegarLoop]: Abstraction has 976 states and 1396 transitions. [2023-11-12 00:48:01,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-12 00:48:01,257 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 1396 transitions. [2023-11-12 00:48:01,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-11-12 00:48:01,270 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:01,271 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-12 00:48:01,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:48:01,271 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:48:01,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:01,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1340835955, now seen corresponding path program 1 times [2023-11-12 00:48:01,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:01,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697534863] [2023-11-12 00:48:01,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:01,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:01,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:01,626 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2023-11-12 00:48:01,626 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:01,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697534863] [2023-11-12 00:48:01,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697534863] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:48:01,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:48:01,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:48:01,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034199185] [2023-11-12 00:48:01,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:48:01,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:48:01,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:48:01,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:48:01,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:48:01,632 INFO L87 Difference]: Start difference. First operand 976 states and 1396 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-12 00:48:02,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:48:02,379 INFO L93 Difference]: Finished difference Result 1584 states and 2240 transitions. [2023-11-12 00:48:02,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:48:02,379 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 157 [2023-11-12 00:48:02,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:48:02,393 INFO L225 Difference]: With dead ends: 1584 [2023-11-12 00:48:02,393 INFO L226 Difference]: Without dead ends: 1579 [2023-11-12 00:48:02,395 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 00:48:02,396 INFO L413 NwaCegarLoop]: 699 mSDtfsCounter, 438 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 1321 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 00:48:02,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 1321 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 00:48:02,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2023-11-12 00:48:02,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 1579. [2023-11-12 00:48:02,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1579 states, 1024 states have (on average 1.3408203125) internal successors, (1373), 1035 states have internal predecessors, (1373), 431 states have call successors, (431), 124 states have call predecessors, (431), 123 states have return successors, (429), 427 states have call predecessors, (429), 429 states have call successors, (429) [2023-11-12 00:48:02,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 2233 transitions. [2023-11-12 00:48:02,523 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 2233 transitions. Word has length 157 [2023-11-12 00:48:02,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:48:02,526 INFO L495 AbstractCegarLoop]: Abstraction has 1579 states and 2233 transitions. [2023-11-12 00:48:02,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-12 00:48:02,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 2233 transitions. [2023-11-12 00:48:02,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-11-12 00:48:02,538 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:02,538 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-12 00:48:02,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:48:02,539 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:48:02,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:02,549 INFO L85 PathProgramCache]: Analyzing trace with hash 945539757, now seen corresponding path program 1 times [2023-11-12 00:48:02,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:02,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006022605] [2023-11-12 00:48:02,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:02,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:02,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:02,822 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2023-11-12 00:48:02,823 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:02,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006022605] [2023-11-12 00:48:02,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006022605] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:48:02,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:48:02,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:48:02,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148562596] [2023-11-12 00:48:02,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:48:02,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:48:02,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:48:02,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:48:02,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:48:02,827 INFO L87 Difference]: Start difference. First operand 1579 states and 2233 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-12 00:48:03,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:48:03,598 INFO L93 Difference]: Finished difference Result 3397 states and 4768 transitions. [2023-11-12 00:48:03,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:48:03,599 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 173 [2023-11-12 00:48:03,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:48:03,615 INFO L225 Difference]: With dead ends: 3397 [2023-11-12 00:48:03,615 INFO L226 Difference]: Without dead ends: 1851 [2023-11-12 00:48:03,625 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 00:48:03,628 INFO L413 NwaCegarLoop]: 676 mSDtfsCounter, 146 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 1270 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 00:48:03,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 1270 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 00:48:03,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1851 states. [2023-11-12 00:48:03,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1851 to 1844. [2023-11-12 00:48:03,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1844 states, 1214 states have (on average 1.3410214168039538) internal successors, (1628), 1227 states have internal predecessors, (1628), 473 states have call successors, (473), 157 states have call predecessors, (473), 156 states have return successors, (471), 467 states have call predecessors, (471), 471 states have call successors, (471) [2023-11-12 00:48:03,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1844 states to 1844 states and 2572 transitions. [2023-11-12 00:48:03,754 INFO L78 Accepts]: Start accepts. Automaton has 1844 states and 2572 transitions. Word has length 173 [2023-11-12 00:48:03,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:48:03,755 INFO L495 AbstractCegarLoop]: Abstraction has 1844 states and 2572 transitions. [2023-11-12 00:48:03,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-12 00:48:03,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1844 states and 2572 transitions. [2023-11-12 00:48:03,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2023-11-12 00:48:03,763 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:03,763 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 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, 1, 1, 1, 1, 1] [2023-11-12 00:48:03,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:48:03,764 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:48:03,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:03,765 INFO L85 PathProgramCache]: Analyzing trace with hash 120392287, now seen corresponding path program 1 times [2023-11-12 00:48:03,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:03,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977218570] [2023-11-12 00:48:03,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:03,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:03,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:05,543 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2023-11-12 00:48:05,543 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:05,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977218570] [2023-11-12 00:48:05,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977218570] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:48:05,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224121069] [2023-11-12 00:48:05,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:05,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:48:05,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af0e26c5-2d40-4d98-affe-c538bdfb4b51/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:48:05,554 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af0e26c5-2d40-4d98-affe-c538bdfb4b51/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:48:05,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af0e26c5-2d40-4d98-affe-c538bdfb4b51/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:48:06,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:06,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 1899 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-12 00:48:06,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:48:07,056 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 545 trivial. 0 not checked. [2023-11-12 00:48:07,056 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:48:07,559 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 545 trivial. 0 not checked. [2023-11-12 00:48:07,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224121069] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 00:48:07,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:48:07,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 4] total 9 [2023-11-12 00:48:07,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389070972] [2023-11-12 00:48:07,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:48:07,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:48:07,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:48:07,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:48:07,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-12 00:48:07,562 INFO L87 Difference]: Start difference. First operand 1844 states and 2572 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 3 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-12 00:48:09,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:48:09,176 INFO L93 Difference]: Finished difference Result 2963 states and 4195 transitions. [2023-11-12 00:48:09,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:48:09,177 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 3 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 215 [2023-11-12 00:48:09,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:48:09,202 INFO L225 Difference]: With dead ends: 2963 [2023-11-12 00:48:09,203 INFO L226 Difference]: Without dead ends: 2958 [2023-11-12 00:48:09,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 428 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-11-12 00:48:09,208 INFO L413 NwaCegarLoop]: 732 mSDtfsCounter, 700 mSDsluCounter, 2315 mSDsCounter, 0 mSdLazyCounter, 1068 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 792 SdHoareTripleChecker+Valid, 3047 SdHoareTripleChecker+Invalid, 1074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:48:09,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [792 Valid, 3047 Invalid, 1074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1068 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-12 00:48:09,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2958 states. [2023-11-12 00:48:09,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2958 to 2582. [2023-11-12 00:48:09,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2582 states, 1708 states have (on average 1.3430913348946136) internal successors, (2294), 1724 states have internal predecessors, (2294), 645 states have call successors, (645), 229 states have call predecessors, (645), 228 states have return successors, (643), 638 states have call predecessors, (643), 643 states have call successors, (643) [2023-11-12 00:48:09,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2582 states to 2582 states and 3582 transitions. [2023-11-12 00:48:09,447 INFO L78 Accepts]: Start accepts. Automaton has 2582 states and 3582 transitions. Word has length 215 [2023-11-12 00:48:09,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:48:09,448 INFO L495 AbstractCegarLoop]: Abstraction has 2582 states and 3582 transitions. [2023-11-12 00:48:09,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 3 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-12 00:48:09,448 INFO L276 IsEmpty]: Start isEmpty. Operand 2582 states and 3582 transitions. [2023-11-12 00:48:09,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2023-11-12 00:48:09,455 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:09,455 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:48:09,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af0e26c5-2d40-4d98-affe-c538bdfb4b51/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:48:09,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af0e26c5-2d40-4d98-affe-c538bdfb4b51/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:48:09,665 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:48:09,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:09,666 INFO L85 PathProgramCache]: Analyzing trace with hash -2014081015, now seen corresponding path program 1 times [2023-11-12 00:48:09,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:09,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769647194] [2023-11-12 00:48:09,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:09,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:09,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:10,728 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2023-11-12 00:48:10,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:10,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769647194] [2023-11-12 00:48:10,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769647194] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:48:10,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836101355] [2023-11-12 00:48:10,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:10,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:48:10,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af0e26c5-2d40-4d98-affe-c538bdfb4b51/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:48:10,731 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af0e26c5-2d40-4d98-affe-c538bdfb4b51/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:48:10,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af0e26c5-2d40-4d98-affe-c538bdfb4b51/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:48:11,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:11,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 1979 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-12 00:48:11,576 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:48:11,633 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 221 proven. 0 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2023-11-12 00:48:11,634 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:48:11,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836101355] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:48:11,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:48:11,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2023-11-12 00:48:11,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125262806] [2023-11-12 00:48:11,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:48:11,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:48:11,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:48:11,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:48:11,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:48:11,637 INFO L87 Difference]: Start difference. First operand 2582 states and 3582 transitions. Second operand has 6 states, 4 states have (on average 19.75) internal successors, (79), 6 states have internal predecessors, (79), 3 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-11-12 00:48:14,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:48:14,290 INFO L93 Difference]: Finished difference Result 5172 states and 7197 transitions. [2023-11-12 00:48:14,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:48:14,290 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 19.75) internal successors, (79), 6 states have internal predecessors, (79), 3 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 226 [2023-11-12 00:48:14,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:48:14,314 INFO L225 Difference]: With dead ends: 5172 [2023-11-12 00:48:14,315 INFO L226 Difference]: Without dead ends: 2589 [2023-11-12 00:48:14,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-12 00:48:14,328 INFO L413 NwaCegarLoop]: 657 mSDtfsCounter, 3 mSDsluCounter, 2597 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 3254 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:48:14,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 3254 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-12 00:48:14,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2589 states. [2023-11-12 00:48:14,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2589 to 2589. [2023-11-12 00:48:14,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2589 states, 1715 states have (on average 1.3416909620991253) internal successors, (2301), 1731 states have internal predecessors, (2301), 645 states have call successors, (645), 229 states have call predecessors, (645), 228 states have return successors, (643), 638 states have call predecessors, (643), 643 states have call successors, (643) [2023-11-12 00:48:14,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2589 states to 2589 states and 3589 transitions. [2023-11-12 00:48:14,557 INFO L78 Accepts]: Start accepts. Automaton has 2589 states and 3589 transitions. Word has length 226 [2023-11-12 00:48:14,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:48:14,558 INFO L495 AbstractCegarLoop]: Abstraction has 2589 states and 3589 transitions. [2023-11-12 00:48:14,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 19.75) internal successors, (79), 6 states have internal predecessors, (79), 3 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-11-12 00:48:14,559 INFO L276 IsEmpty]: Start isEmpty. Operand 2589 states and 3589 transitions. [2023-11-12 00:48:14,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2023-11-12 00:48:14,567 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:14,568 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:48:14,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af0e26c5-2d40-4d98-affe-c538bdfb4b51/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:48:14,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af0e26c5-2d40-4d98-affe-c538bdfb4b51/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:48:14,779 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:48:14,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:14,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1550235307, now seen corresponding path program 1 times [2023-11-12 00:48:14,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:14,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227788959] [2023-11-12 00:48:14,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:14,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:15,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:15,944 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 8 proven. 73 refuted. 0 times theorem prover too weak. 641 trivial. 0 not checked. [2023-11-12 00:48:15,944 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:15,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227788959] [2023-11-12 00:48:15,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227788959] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:48:15,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527299801] [2023-11-12 00:48:15,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:15,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:48:15,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af0e26c5-2d40-4d98-affe-c538bdfb4b51/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:48:15,947 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af0e26c5-2d40-4d98-affe-c538bdfb4b51/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:48:15,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af0e26c5-2d40-4d98-affe-c538bdfb4b51/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:48:17,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:17,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 2144 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-12 00:48:17,158 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:48:17,221 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 277 proven. 1 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2023-11-12 00:48:17,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:48:17,583 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 8 proven. 73 refuted. 0 times theorem prover too weak. 641 trivial. 0 not checked. [2023-11-12 00:48:17,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527299801] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:48:17,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1909977442] [2023-11-12 00:48:17,611 INFO L159 IcfgInterpreter]: Started Sifa with 98 locations of interest [2023-11-12 00:48:17,611 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:48:17,615 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:48:17,621 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:48:17,621 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs