./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 9bd2c7ff 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_f3c16d43-3b28-4951-a47b-22917e5d4a8c/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c16d43-3b28-4951-a47b-22917e5d4a8c/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c16d43-3b28-4951-a47b-22917e5d4a8c/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c16d43-3b28-4951-a47b-22917e5d4a8c/bin/utaipan-verify-t7M7D8N6sZ/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_f3c16d43-3b28-4951-a47b-22917e5d4a8c/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c16d43-3b28-4951-a47b-22917e5d4a8c/bin/utaipan-verify-t7M7D8N6sZ --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-9bd2c7f [2023-11-19 04:53:49,633 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:53:49,737 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c16d43-3b28-4951-a47b-22917e5d4a8c/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-19 04:53:49,744 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:53:49,745 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:53:49,778 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:53:49,779 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:53:49,780 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:53:49,781 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:53:49,782 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:53:49,782 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:53:49,783 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:53:49,784 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:53:49,784 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:53:49,785 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:53:49,786 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:53:49,786 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:53:49,787 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:53:49,787 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:53:49,788 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:53:49,789 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:53:49,796 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:53:49,797 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:53:49,798 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:53:49,798 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:53:49,799 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:53:49,799 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:53:49,800 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:53:49,800 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:53:49,801 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:53:49,802 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:53:49,803 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:53:49,803 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:53:49,804 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:53:49,804 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:53:49,805 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:53:49,805 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:53:49,805 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:53:49,805 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:53:49,806 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:53:49,806 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:53:49,807 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:53:49,808 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_f3c16d43-3b28-4951-a47b-22917e5d4a8c/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c16d43-3b28-4951-a47b-22917e5d4a8c/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 03d5d1a576959110e79c00ca2825754bce7439905d85699b470a90adbbee10ad [2023-11-19 04:53:50,154 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:53:50,188 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:53:50,192 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:53:50,193 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:53:50,194 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:53:50,195 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c16d43-3b28-4951-a47b-22917e5d4a8c/bin/utaipan-verify-t7M7D8N6sZ/../../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 [2023-11-19 04:53:53,489 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:53:54,188 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:53:54,189 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c16d43-3b28-4951-a47b-22917e5d4a8c/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 [2023-11-19 04:53:54,287 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c16d43-3b28-4951-a47b-22917e5d4a8c/bin/utaipan-verify-t7M7D8N6sZ/data/df94f34a1/324f96a9131243cbb47ec221fc04d262/FLAG8b24231c5 [2023-11-19 04:53:54,316 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c16d43-3b28-4951-a47b-22917e5d4a8c/bin/utaipan-verify-t7M7D8N6sZ/data/df94f34a1/324f96a9131243cbb47ec221fc04d262 [2023-11-19 04:53:54,320 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:53:54,322 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:53:54,324 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:53:54,324 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:53:54,331 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:53:54,332 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:53:54" (1/1) ... [2023-11-19 04:53:54,333 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69bd3b91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:54, skipping insertion in model container [2023-11-19 04:53:54,334 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:53:54" (1/1) ... [2023-11-19 04:53:54,496 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:53:55,855 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_f3c16d43-3b28-4951-a47b-22917e5d4a8c/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] [2023-11-19 04:53:55,914 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:53:55,937 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:53:56,100 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] [2023-11-19 04:53:56,103 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] [2023-11-19 04:53:56,106 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("bsrq %1,%q0": "+r" (bitpos): "rm" (x)); [4182] [2023-11-19 04:53:56,450 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_f3c16d43-3b28-4951-a47b-22917e5d4a8c/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] [2023-11-19 04:53:56,468 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:53:56,574 WARN L675 CHandler]: The function sprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 04:53:56,584 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:53:56,585 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:56 WrapperNode [2023-11-19 04:53:56,585 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:53:56,587 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:53:56,587 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:53:56,587 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:53:56,597 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:56" (1/1) ... [2023-11-19 04:53:56,688 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:56" (1/1) ... [2023-11-19 04:53:56,837 INFO L138 Inliner]: procedures = 151, calls = 834, calls flagged for inlining = 67, calls inlined = 53, statements flattened = 1829 [2023-11-19 04:53:56,838 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:53:56,839 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:53:56,839 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:53:56,839 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:53:56,851 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:56" (1/1) ... [2023-11-19 04:53:56,851 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:56" (1/1) ... [2023-11-19 04:53:56,881 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:56" (1/1) ... [2023-11-19 04:53:56,887 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:56" (1/1) ... [2023-11-19 04:53:57,046 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:56" (1/1) ... [2023-11-19 04:53:57,075 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:56" (1/1) ... [2023-11-19 04:53:57,092 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:56" (1/1) ... [2023-11-19 04:53:57,104 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:56" (1/1) ... [2023-11-19 04:53:57,125 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:53:57,126 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:53:57,127 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:53:57,127 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:53:57,128 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:56" (1/1) ... [2023-11-19 04:53:57,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:53:57,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c16d43-3b28-4951-a47b-22917e5d4a8c/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:53:57,182 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c16d43-3b28-4951-a47b-22917e5d4a8c/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:53:57,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c16d43-3b28-4951-a47b-22917e5d4a8c/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:53:57,242 INFO L130 BoogieDeclarations]: Found specification of procedure dlm_lock_sync [2023-11-19 04:53:57,242 INFO L138 BoogieDeclarations]: Found implementation of procedure dlm_lock_sync [2023-11-19 04:53:57,242 INFO L130 BoogieDeclarations]: Found specification of procedure lockres_free [2023-11-19 04:53:57,242 INFO L138 BoogieDeclarations]: Found implementation of procedure lockres_free [2023-11-19 04:53:57,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-19 04:53:57,245 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-19 04:53:57,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-19 04:53:57,245 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-19 04:53:57,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-19 04:53:57,246 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 04:53:57,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-11-19 04:53:57,246 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-11-19 04:53:57,246 INFO L130 BoogieDeclarations]: Found specification of procedure dlm_release_lockspace [2023-11-19 04:53:57,247 INFO L138 BoogieDeclarations]: Found implementation of procedure dlm_release_lockspace [2023-11-19 04:53:57,247 INFO L130 BoogieDeclarations]: Found specification of procedure lock_comm [2023-11-19 04:53:57,247 INFO L138 BoogieDeclarations]: Found implementation of procedure lock_comm [2023-11-19 04:53:57,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-11-19 04:53:57,248 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-11-19 04:53:57,249 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-19 04:53:57,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-19 04:53:57,250 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2023-11-19 04:53:57,250 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2023-11-19 04:53:57,250 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put [2023-11-19 04:53:57,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put [2023-11-19 04:53:57,252 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-19 04:53:57,252 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-19 04:53:57,252 INFO L130 BoogieDeclarations]: Found specification of procedure init_completion [2023-11-19 04:53:57,253 INFO L138 BoogieDeclarations]: Found implementation of procedure init_completion [2023-11-19 04:53:57,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 04:53:57,254 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-19 04:53:57,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-19 04:53:57,254 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2023-11-19 04:53:57,255 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2023-11-19 04:53:57,255 INFO L130 BoogieDeclarations]: Found specification of procedure md_wakeup_thread [2023-11-19 04:53:57,256 INFO L138 BoogieDeclarations]: Found implementation of procedure md_wakeup_thread [2023-11-19 04:53:57,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-19 04:53:57,256 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-19 04:53:57,256 INFO L130 BoogieDeclarations]: Found specification of procedure bitmap_copy_from_slot [2023-11-19 04:53:57,257 INFO L138 BoogieDeclarations]: Found implementation of procedure bitmap_copy_from_slot [2023-11-19 04:53:57,257 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2023-11-19 04:53:57,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2023-11-19 04:53:57,257 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 04:53:57,258 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 04:53:57,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 04:53:57,258 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2023-11-19 04:53:57,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2023-11-19 04:53:57,258 INFO L130 BoogieDeclarations]: Found specification of procedure complete [2023-11-19 04:53:57,259 INFO L138 BoogieDeclarations]: Found implementation of procedure complete [2023-11-19 04:53:57,259 INFO L130 BoogieDeclarations]: Found specification of procedure md_register_thread [2023-11-19 04:53:57,259 INFO L138 BoogieDeclarations]: Found implementation of procedure md_register_thread [2023-11-19 04:53:57,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:53:57,260 INFO L130 BoogieDeclarations]: Found specification of procedure md_unregister_thread [2023-11-19 04:53:57,260 INFO L138 BoogieDeclarations]: Found implementation of procedure md_unregister_thread [2023-11-19 04:53:57,260 INFO L130 BoogieDeclarations]: Found specification of procedure wait_for_completion [2023-11-19 04:53:57,260 INFO L138 BoogieDeclarations]: Found implementation of procedure wait_for_completion [2023-11-19 04:53:57,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 04:53:57,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 04:53:57,261 INFO L130 BoogieDeclarations]: Found specification of procedure sprintf [2023-11-19 04:53:57,262 INFO L130 BoogieDeclarations]: Found specification of procedure resync_send [2023-11-19 04:53:57,262 INFO L138 BoogieDeclarations]: Found implementation of procedure resync_send [2023-11-19 04:53:57,263 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2023-11-19 04:53:57,264 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2023-11-19 04:53:57,264 INFO L130 BoogieDeclarations]: Found specification of procedure lockres_init [2023-11-19 04:53:57,265 INFO L138 BoogieDeclarations]: Found implementation of procedure lockres_init [2023-11-19 04:53:57,265 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 04:53:57,265 INFO L130 BoogieDeclarations]: Found specification of procedure unlock_comm [2023-11-19 04:53:57,265 INFO L138 BoogieDeclarations]: Found implementation of procedure unlock_comm [2023-11-19 04:53:57,265 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2023-11-19 04:53:57,266 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2023-11-19 04:53:57,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 04:53:57,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-19 04:53:57,267 INFO L130 BoogieDeclarations]: Found specification of procedure resync_info_update [2023-11-19 04:53:57,267 INFO L138 BoogieDeclarations]: Found implementation of procedure resync_info_update [2023-11-19 04:53:57,267 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-19 04:53:57,267 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-19 04:53:57,267 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2023-11-19 04:53:57,268 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2023-11-19 04:53:57,268 INFO L130 BoogieDeclarations]: Found specification of procedure __sendmsg [2023-11-19 04:53:57,268 INFO L138 BoogieDeclarations]: Found implementation of procedure __sendmsg [2023-11-19 04:53:57,268 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2023-11-19 04:53:57,269 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2023-11-19 04:53:57,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:53:57,269 INFO L130 BoogieDeclarations]: Found specification of procedure pretty_uuid [2023-11-19 04:53:57,269 INFO L138 BoogieDeclarations]: Found implementation of procedure pretty_uuid [2023-11-19 04:53:57,270 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-19 04:53:57,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:53:57,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:53:57,271 INFO L130 BoogieDeclarations]: Found specification of procedure sendmsg [2023-11-19 04:53:57,271 INFO L138 BoogieDeclarations]: Found implementation of procedure sendmsg [2023-11-19 04:53:57,271 INFO L130 BoogieDeclarations]: Found specification of procedure dlm_unlock_sync [2023-11-19 04:53:57,272 INFO L138 BoogieDeclarations]: Found implementation of procedure dlm_unlock_sync [2023-11-19 04:53:57,831 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:53:57,837 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:53:58,048 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-19 04:53:59,673 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:54:00,033 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:54:00,033 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 04:54:00,045 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:54:00 BoogieIcfgContainer [2023-11-19 04:54:00,045 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:54:00,048 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:54:00,049 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:54:00,053 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:54:00,053 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:53:54" (1/3) ... [2023-11-19 04:54:00,054 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33492817 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:54:00, skipping insertion in model container [2023-11-19 04:54:00,054 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:56" (2/3) ... [2023-11-19 04:54:00,055 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33492817 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:54:00, skipping insertion in model container [2023-11-19 04:54:00,055 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:54:00" (3/3) ... [2023-11-19 04:54:00,056 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--md--md-cluster.ko-entry_point.cil.out.i [2023-11-19 04:54:00,079 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:54:00,079 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 04:54:00,166 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:54:00,176 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;@6a92df89, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:54:00,176 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 04:54:00,184 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) [2023-11-19 04:54:00,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-11-19 04:54:00,203 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:54:00,204 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] [2023-11-19 04:54:00,204 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:54:00,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:54:00,239 INFO L85 PathProgramCache]: Analyzing trace with hash 702854034, now seen corresponding path program 1 times [2023-11-19 04:54:00,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:54:00,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840925574] [2023-11-19 04:54:00,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:54:00,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:54:00,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:54:01,346 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2023-11-19 04:54:01,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:54:01,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840925574] [2023-11-19 04:54:01,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840925574] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:54:01,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:54:01,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:54:01,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356211017] [2023-11-19 04:54:01,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:54:01,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:54:01,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:54:01,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:54:01,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:54:01,420 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) [2023-11-19 04:54:02,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:54:02,344 INFO L93 Difference]: Finished difference Result 1483 states and 2133 transitions. [2023-11-19 04:54:02,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:54:02,348 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 [2023-11-19 04:54:02,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:54:02,385 INFO L225 Difference]: With dead ends: 1483 [2023-11-19 04:54:02,386 INFO L226 Difference]: Without dead ends: 979 [2023-11-19 04:54:02,401 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 [2023-11-19 04:54:02,413 INFO L413 NwaCegarLoop]: 680 mSDtfsCounter, 670 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 04:54:02,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [670 Valid, 1346 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 04:54:02,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2023-11-19 04:54:02,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 976. [2023-11-19 04:54:02,615 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) [2023-11-19 04:54:02,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 1396 transitions. [2023-11-19 04:54:02,633 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 1396 transitions. Word has length 146 [2023-11-19 04:54:02,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:54:02,636 INFO L495 AbstractCegarLoop]: Abstraction has 976 states and 1396 transitions. [2023-11-19 04:54:02,644 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) [2023-11-19 04:54:02,644 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 1396 transitions. [2023-11-19 04:54:02,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-11-19 04:54:02,658 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:54:02,659 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] [2023-11-19 04:54:02,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:54:02,660 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:54:02,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:54:02,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1340835955, now seen corresponding path program 1 times [2023-11-19 04:54:02,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:54:02,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785856121] [2023-11-19 04:54:02,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:54:02,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:54:02,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:54:03,165 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2023-11-19 04:54:03,165 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:54:03,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785856121] [2023-11-19 04:54:03,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785856121] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:54:03,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:54:03,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:54:03,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763739206] [2023-11-19 04:54:03,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:54:03,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:54:03,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:54:03,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:54:03,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:54:03,170 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) [2023-11-19 04:54:03,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:54:03,790 INFO L93 Difference]: Finished difference Result 1584 states and 2240 transitions. [2023-11-19 04:54:03,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:54:03,790 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 [2023-11-19 04:54:03,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:54:03,808 INFO L225 Difference]: With dead ends: 1584 [2023-11-19 04:54:03,808 INFO L226 Difference]: Without dead ends: 1579 [2023-11-19 04:54:03,809 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 [2023-11-19 04:54:03,815 INFO L413 NwaCegarLoop]: 699 mSDtfsCounter, 438 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 04:54:03,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 1321 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 04:54:03,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2023-11-19 04:54:04,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 1579. [2023-11-19 04:54:04,031 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) [2023-11-19 04:54:04,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 2233 transitions. [2023-11-19 04:54:04,054 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 2233 transitions. Word has length 157 [2023-11-19 04:54:04,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:54:04,079 INFO L495 AbstractCegarLoop]: Abstraction has 1579 states and 2233 transitions. [2023-11-19 04:54:04,079 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) [2023-11-19 04:54:04,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 2233 transitions. [2023-11-19 04:54:04,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-11-19 04:54:04,105 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:54:04,105 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] [2023-11-19 04:54:04,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 04:54:04,106 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:54:04,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:54:04,106 INFO L85 PathProgramCache]: Analyzing trace with hash 945539757, now seen corresponding path program 1 times [2023-11-19 04:54:04,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:54:04,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688244235] [2023-11-19 04:54:04,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:54:04,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:54:04,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:54:04,475 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2023-11-19 04:54:04,476 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:54:04,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688244235] [2023-11-19 04:54:04,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688244235] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:54:04,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:54:04,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:54:04,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122091999] [2023-11-19 04:54:04,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:54:04,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:54:04,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:54:04,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:54:04,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:54:04,480 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) [2023-11-19 04:54:05,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:54:05,138 INFO L93 Difference]: Finished difference Result 3397 states and 4768 transitions. [2023-11-19 04:54:05,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:54:05,138 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 [2023-11-19 04:54:05,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:54:05,152 INFO L225 Difference]: With dead ends: 3397 [2023-11-19 04:54:05,153 INFO L226 Difference]: Without dead ends: 1851 [2023-11-19 04:54:05,160 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 [2023-11-19 04:54:05,161 INFO L413 NwaCegarLoop]: 676 mSDtfsCounter, 146 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 04:54:05,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 1270 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 04:54:05,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1851 states. [2023-11-19 04:54:05,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1851 to 1844. [2023-11-19 04:54:05,376 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) [2023-11-19 04:54:05,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1844 states to 1844 states and 2572 transitions. [2023-11-19 04:54:05,402 INFO L78 Accepts]: Start accepts. Automaton has 1844 states and 2572 transitions. Word has length 173 [2023-11-19 04:54:05,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:54:05,402 INFO L495 AbstractCegarLoop]: Abstraction has 1844 states and 2572 transitions. [2023-11-19 04:54:05,403 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) [2023-11-19 04:54:05,403 INFO L276 IsEmpty]: Start isEmpty. Operand 1844 states and 2572 transitions. [2023-11-19 04:54:05,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2023-11-19 04:54:05,411 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:54:05,411 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] [2023-11-19 04:54:05,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 04:54:05,412 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:54:05,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:54:05,413 INFO L85 PathProgramCache]: Analyzing trace with hash 120392287, now seen corresponding path program 1 times [2023-11-19 04:54:05,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:54:05,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896808860] [2023-11-19 04:54:05,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:54:05,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:54:05,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:54:07,186 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2023-11-19 04:54:07,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:54:07,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896808860] [2023-11-19 04:54:07,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896808860] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:54:07,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357322429] [2023-11-19 04:54:07,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:54:07,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:54:07,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c16d43-3b28-4951-a47b-22917e5d4a8c/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:54:07,195 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c16d43-3b28-4951-a47b-22917e5d4a8c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:54:07,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c16d43-3b28-4951-a47b-22917e5d4a8c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:54:08,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:54:08,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 1899 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 04:54:08,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:54:08,930 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 545 trivial. 0 not checked. [2023-11-19 04:54:08,930 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:54:09,498 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 545 trivial. 0 not checked. [2023-11-19 04:54:09,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357322429] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 04:54:09,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 04:54:09,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 4] total 9 [2023-11-19 04:54:09,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460458470] [2023-11-19 04:54:09,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:54:09,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 04:54:09,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:54:09,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 04:54:09,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-19 04:54:09,510 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) [2023-11-19 04:54:11,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:54:11,218 INFO L93 Difference]: Finished difference Result 2963 states and 4195 transitions. [2023-11-19 04:54:11,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 04:54:11,219 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 [2023-11-19 04:54:11,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:54:11,246 INFO L225 Difference]: With dead ends: 2963 [2023-11-19 04:54:11,246 INFO L226 Difference]: Without dead ends: 2958 [2023-11-19 04:54:11,248 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 [2023-11-19 04:54:11,251 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, 1.5s IncrementalHoareTripleChecker+Time [2023-11-19 04:54:11,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [792 Valid, 3047 Invalid, 1074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1068 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-19 04:54:11,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2958 states. [2023-11-19 04:54:11,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2958 to 2582. [2023-11-19 04:54:11,440 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) [2023-11-19 04:54:11,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2582 states to 2582 states and 3582 transitions. [2023-11-19 04:54:11,462 INFO L78 Accepts]: Start accepts. Automaton has 2582 states and 3582 transitions. Word has length 215 [2023-11-19 04:54:11,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:54:11,464 INFO L495 AbstractCegarLoop]: Abstraction has 2582 states and 3582 transitions. [2023-11-19 04:54:11,464 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) [2023-11-19 04:54:11,464 INFO L276 IsEmpty]: Start isEmpty. Operand 2582 states and 3582 transitions. [2023-11-19 04:54:11,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2023-11-19 04:54:11,471 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:54:11,471 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] [2023-11-19 04:54:11,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c16d43-3b28-4951-a47b-22917e5d4a8c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 04:54:11,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c16d43-3b28-4951-a47b-22917e5d4a8c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:54:11,692 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:54:11,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:54:11,692 INFO L85 PathProgramCache]: Analyzing trace with hash -2014081015, now seen corresponding path program 1 times [2023-11-19 04:54:11,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:54:11,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852548672] [2023-11-19 04:54:11,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:54:11,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:54:11,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:54:12,711 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2023-11-19 04:54:12,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:54:12,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852548672] [2023-11-19 04:54:12,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852548672] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:54:12,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083093566] [2023-11-19 04:54:12,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:54:12,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:54:12,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c16d43-3b28-4951-a47b-22917e5d4a8c/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:54:12,716 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c16d43-3b28-4951-a47b-22917e5d4a8c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:54:12,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c16d43-3b28-4951-a47b-22917e5d4a8c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 04:54:13,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:54:13,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 1979 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-19 04:54:13,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:54:13,633 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 316 proven. 0 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2023-11-19 04:54:13,633 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:54:13,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083093566] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:54:13,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:54:13,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2023-11-19 04:54:13,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909926628] [2023-11-19 04:54:13,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:54:13,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 04:54:13,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:54:13,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 04:54:13,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:54:13,636 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) [2023-11-19 04:54:16,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:54:16,413 INFO L93 Difference]: Finished difference Result 5172 states and 7197 transitions. [2023-11-19 04:54:16,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 04:54:16,417 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 [2023-11-19 04:54:16,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:54:16,456 INFO L225 Difference]: With dead ends: 5172 [2023-11-19 04:54:16,468 INFO L226 Difference]: Without dead ends: 2589 [2023-11-19 04:54:16,488 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 [2023-11-19 04:54:16,488 INFO L413 NwaCegarLoop]: 657 mSDtfsCounter, 3 mSDsluCounter, 2597 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s 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, 2.5s IncrementalHoareTripleChecker+Time [2023-11-19 04:54:16,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 3254 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-19 04:54:16,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2589 states. [2023-11-19 04:54:16,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2589 to 2589. [2023-11-19 04:54:16,760 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) [2023-11-19 04:54:16,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2589 states to 2589 states and 3589 transitions. [2023-11-19 04:54:16,782 INFO L78 Accepts]: Start accepts. Automaton has 2589 states and 3589 transitions. Word has length 226 [2023-11-19 04:54:16,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:54:16,783 INFO L495 AbstractCegarLoop]: Abstraction has 2589 states and 3589 transitions. [2023-11-19 04:54:16,783 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) [2023-11-19 04:54:16,783 INFO L276 IsEmpty]: Start isEmpty. Operand 2589 states and 3589 transitions. [2023-11-19 04:54:16,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2023-11-19 04:54:16,791 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:54:16,792 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] [2023-11-19 04:54:16,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c16d43-3b28-4951-a47b-22917e5d4a8c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 04:54:17,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c16d43-3b28-4951-a47b-22917e5d4a8c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:54:17,012 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:54:17,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:54:17,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1550235307, now seen corresponding path program 1 times [2023-11-19 04:54:17,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:54:17,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970679708] [2023-11-19 04:54:17,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:54:17,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:54:17,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:54:18,230 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 8 proven. 73 refuted. 0 times theorem prover too weak. 641 trivial. 0 not checked. [2023-11-19 04:54:18,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:54:18,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970679708] [2023-11-19 04:54:18,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970679708] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:54:18,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504236049] [2023-11-19 04:54:18,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:54:18,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:54:18,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c16d43-3b28-4951-a47b-22917e5d4a8c/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:54:18,233 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c16d43-3b28-4951-a47b-22917e5d4a8c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:54:18,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c16d43-3b28-4951-a47b-22917e5d4a8c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 04:54:19,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:54:19,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 2144 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-19 04:54:19,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:54:19,371 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 423 proven. 10 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2023-11-19 04:54:19,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:54:19,790 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 48 proven. 33 refuted. 0 times theorem prover too weak. 641 trivial. 0 not checked. [2023-11-19 04:54:19,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504236049] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:54:19,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [213747637] [2023-11-19 04:54:19,820 INFO L159 IcfgInterpreter]: Started Sifa with 98 locations of interest [2023-11-19 04:54:19,820 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:54:19,824 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:54:19,830 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:54:19,830 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs