./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 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ed4c15-4ac8-408f-b865-c94999d214ca/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ed4c15-4ac8-408f-b865-c94999d214ca/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ed4c15-4ac8-408f-b865-c94999d214ca/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ed4c15-4ac8-408f-b865-c94999d214ca/bin/utaipan-verify-nQ1chXbOIh/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_87ed4c15-4ac8-408f-b865-c94999d214ca/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ed4c15-4ac8-408f-b865-c94999d214ca/bin/utaipan-verify-nQ1chXbOIh --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 0.2.4-dev-0e0057c [2023-12-02 13:59:06,814 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 13:59:06,887 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ed4c15-4ac8-408f-b865-c94999d214ca/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-12-02 13:59:06,891 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 13:59:06,892 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 13:59:06,914 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 13:59:06,914 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 13:59:06,915 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 13:59:06,915 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 13:59:06,916 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 13:59:06,916 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 13:59:06,917 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 13:59:06,917 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 13:59:06,918 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 13:59:06,919 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 13:59:06,919 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 13:59:06,920 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 13:59:06,920 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 13:59:06,921 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 13:59:06,921 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 13:59:06,922 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 13:59:06,923 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 13:59:06,923 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 13:59:06,924 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 13:59:06,924 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 13:59:06,925 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 13:59:06,925 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 13:59:06,926 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 13:59:06,926 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 13:59:06,926 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 13:59:06,927 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 13:59:06,927 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 13:59:06,927 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 13:59:06,928 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 13:59:06,928 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:59:06,928 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 13:59:06,928 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 13:59:06,928 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 13:59:06,929 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 13:59:06,929 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 13:59:06,929 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 13:59:06,929 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 13:59:06,930 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 13:59:06,930 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 13:59:06,930 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_87ed4c15-4ac8-408f-b865-c94999d214ca/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ed4c15-4ac8-408f-b865-c94999d214ca/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 03d5d1a576959110e79c00ca2825754bce7439905d85699b470a90adbbee10ad [2023-12-02 13:59:07,120 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 13:59:07,139 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 13:59:07,142 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 13:59:07,143 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 13:59:07,143 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 13:59:07,144 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ed4c15-4ac8-408f-b865-c94999d214ca/bin/utaipan-verify-nQ1chXbOIh/../../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 [2023-12-02 13:59:09,901 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 13:59:10,274 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 13:59:10,274 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ed4c15-4ac8-408f-b865-c94999d214ca/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 [2023-12-02 13:59:10,311 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ed4c15-4ac8-408f-b865-c94999d214ca/bin/utaipan-verify-nQ1chXbOIh/data/19be8c194/910f222248ef4e1abdc7f4e8a6b2e94c/FLAGe4283dbbd [2023-12-02 13:59:10,324 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ed4c15-4ac8-408f-b865-c94999d214ca/bin/utaipan-verify-nQ1chXbOIh/data/19be8c194/910f222248ef4e1abdc7f4e8a6b2e94c [2023-12-02 13:59:10,326 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 13:59:10,328 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 13:59:10,329 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 13:59:10,329 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 13:59:10,334 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 13:59:10,335 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:59:10" (1/1) ... [2023-12-02 13:59:10,336 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d2d2f02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:59:10, skipping insertion in model container [2023-12-02 13:59:10,336 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:59:10" (1/1) ... [2023-12-02 13:59:10,434 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 13:59:11,390 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_87ed4c15-4ac8-408f-b865-c94999d214ca/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] [2023-12-02 13:59:11,426 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:59:11,444 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 13:59:11,533 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] [2023-12-02 13:59:11,534 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] [2023-12-02 13:59:11,536 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("bsrq %1,%q0": "+r" (bitpos): "rm" (x)); [4182] [2023-12-02 13:59:11,748 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_87ed4c15-4ac8-408f-b865-c94999d214ca/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] [2023-12-02 13:59:11,755 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:59:11,819 WARN L675 CHandler]: The function sprintf is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 13:59:11,826 INFO L206 MainTranslator]: Completed translation [2023-12-02 13:59:11,827 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:59:11 WrapperNode [2023-12-02 13:59:11,827 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 13:59:11,828 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 13:59:11,828 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 13:59:11,828 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 13:59:11,835 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:59:11" (1/1) ... [2023-12-02 13:59:11,880 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:59:11" (1/1) ... [2023-12-02 13:59:11,946 INFO L138 Inliner]: procedures = 151, calls = 834, calls flagged for inlining = 67, calls inlined = 53, statements flattened = 1881 [2023-12-02 13:59:11,946 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 13:59:11,947 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 13:59:11,947 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 13:59:11,947 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 13:59:11,956 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:59:11" (1/1) ... [2023-12-02 13:59:11,957 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:59:11" (1/1) ... [2023-12-02 13:59:11,970 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:59:11" (1/1) ... [2023-12-02 13:59:11,971 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:59:11" (1/1) ... [2023-12-02 13:59:12,049 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:59:11" (1/1) ... [2023-12-02 13:59:12,060 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:59:11" (1/1) ... [2023-12-02 13:59:12,071 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:59:11" (1/1) ... [2023-12-02 13:59:12,082 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:59:11" (1/1) ... [2023-12-02 13:59:12,103 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 13:59:12,104 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 13:59:12,105 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 13:59:12,105 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 13:59:12,106 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:59:11" (1/1) ... [2023-12-02 13:59:12,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:59:12,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ed4c15-4ac8-408f-b865-c94999d214ca/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:59:12,133 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ed4c15-4ac8-408f-b865-c94999d214ca/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 13:59:12,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ed4c15-4ac8-408f-b865-c94999d214ca/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 13:59:12,165 INFO L130 BoogieDeclarations]: Found specification of procedure dlm_lock_sync [2023-12-02 13:59:12,166 INFO L138 BoogieDeclarations]: Found implementation of procedure dlm_lock_sync [2023-12-02 13:59:12,166 INFO L130 BoogieDeclarations]: Found specification of procedure lockres_free [2023-12-02 13:59:12,166 INFO L138 BoogieDeclarations]: Found implementation of procedure lockres_free [2023-12-02 13:59:12,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-12-02 13:59:12,167 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-12-02 13:59:12,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-12-02 13:59:12,167 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-12-02 13:59:12,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-12-02 13:59:12,167 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 13:59:12,168 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-12-02 13:59:12,168 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-12-02 13:59:12,168 INFO L130 BoogieDeclarations]: Found specification of procedure dlm_release_lockspace [2023-12-02 13:59:12,168 INFO L138 BoogieDeclarations]: Found implementation of procedure dlm_release_lockspace [2023-12-02 13:59:12,169 INFO L130 BoogieDeclarations]: Found specification of procedure lock_comm [2023-12-02 13:59:12,169 INFO L138 BoogieDeclarations]: Found implementation of procedure lock_comm [2023-12-02 13:59:12,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-12-02 13:59:12,169 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-12-02 13:59:12,169 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-12-02 13:59:12,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-12-02 13:59:12,170 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2023-12-02 13:59:12,170 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2023-12-02 13:59:12,170 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put [2023-12-02 13:59:12,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put [2023-12-02 13:59:12,171 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-12-02 13:59:12,171 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-12-02 13:59:12,171 INFO L130 BoogieDeclarations]: Found specification of procedure init_completion [2023-12-02 13:59:12,171 INFO L138 BoogieDeclarations]: Found implementation of procedure init_completion [2023-12-02 13:59:12,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 13:59:12,171 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-12-02 13:59:12,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-12-02 13:59:12,172 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2023-12-02 13:59:12,172 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2023-12-02 13:59:12,172 INFO L130 BoogieDeclarations]: Found specification of procedure md_wakeup_thread [2023-12-02 13:59:12,172 INFO L138 BoogieDeclarations]: Found implementation of procedure md_wakeup_thread [2023-12-02 13:59:12,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-12-02 13:59:12,173 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-12-02 13:59:12,173 INFO L130 BoogieDeclarations]: Found specification of procedure bitmap_copy_from_slot [2023-12-02 13:59:12,173 INFO L138 BoogieDeclarations]: Found implementation of procedure bitmap_copy_from_slot [2023-12-02 13:59:12,173 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2023-12-02 13:59:12,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2023-12-02 13:59:12,173 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 13:59:12,173 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 13:59:12,174 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 13:59:12,174 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2023-12-02 13:59:12,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2023-12-02 13:59:12,174 INFO L130 BoogieDeclarations]: Found specification of procedure complete [2023-12-02 13:59:12,174 INFO L138 BoogieDeclarations]: Found implementation of procedure complete [2023-12-02 13:59:12,174 INFO L130 BoogieDeclarations]: Found specification of procedure md_register_thread [2023-12-02 13:59:12,174 INFO L138 BoogieDeclarations]: Found implementation of procedure md_register_thread [2023-12-02 13:59:12,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 13:59:12,175 INFO L130 BoogieDeclarations]: Found specification of procedure md_unregister_thread [2023-12-02 13:59:12,175 INFO L138 BoogieDeclarations]: Found implementation of procedure md_unregister_thread [2023-12-02 13:59:12,175 INFO L130 BoogieDeclarations]: Found specification of procedure wait_for_completion [2023-12-02 13:59:12,175 INFO L138 BoogieDeclarations]: Found implementation of procedure wait_for_completion [2023-12-02 13:59:12,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 13:59:12,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 13:59:12,176 INFO L130 BoogieDeclarations]: Found specification of procedure sprintf [2023-12-02 13:59:12,176 INFO L130 BoogieDeclarations]: Found specification of procedure resync_send [2023-12-02 13:59:12,176 INFO L138 BoogieDeclarations]: Found implementation of procedure resync_send [2023-12-02 13:59:12,176 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2023-12-02 13:59:12,176 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2023-12-02 13:59:12,176 INFO L130 BoogieDeclarations]: Found specification of procedure lockres_init [2023-12-02 13:59:12,176 INFO L138 BoogieDeclarations]: Found implementation of procedure lockres_init [2023-12-02 13:59:12,177 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 13:59:12,177 INFO L130 BoogieDeclarations]: Found specification of procedure unlock_comm [2023-12-02 13:59:12,177 INFO L138 BoogieDeclarations]: Found implementation of procedure unlock_comm [2023-12-02 13:59:12,177 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2023-12-02 13:59:12,177 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2023-12-02 13:59:12,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 13:59:12,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-12-02 13:59:12,178 INFO L130 BoogieDeclarations]: Found specification of procedure resync_info_update [2023-12-02 13:59:12,178 INFO L138 BoogieDeclarations]: Found implementation of procedure resync_info_update [2023-12-02 13:59:12,178 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-12-02 13:59:12,178 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-12-02 13:59:12,178 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2023-12-02 13:59:12,178 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2023-12-02 13:59:12,178 INFO L130 BoogieDeclarations]: Found specification of procedure __sendmsg [2023-12-02 13:59:12,179 INFO L138 BoogieDeclarations]: Found implementation of procedure __sendmsg [2023-12-02 13:59:12,179 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2023-12-02 13:59:12,179 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2023-12-02 13:59:12,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 13:59:12,179 INFO L130 BoogieDeclarations]: Found specification of procedure pretty_uuid [2023-12-02 13:59:12,179 INFO L138 BoogieDeclarations]: Found implementation of procedure pretty_uuid [2023-12-02 13:59:12,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-12-02 13:59:12,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 13:59:12,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 13:59:12,180 INFO L130 BoogieDeclarations]: Found specification of procedure sendmsg [2023-12-02 13:59:12,180 INFO L138 BoogieDeclarations]: Found implementation of procedure sendmsg [2023-12-02 13:59:12,180 INFO L130 BoogieDeclarations]: Found specification of procedure dlm_unlock_sync [2023-12-02 13:59:12,180 INFO L138 BoogieDeclarations]: Found implementation of procedure dlm_unlock_sync [2023-12-02 13:59:12,531 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 13:59:12,534 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 13:59:12,671 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-12-02 13:59:13,825 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 13:59:14,036 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 13:59:14,036 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-02 13:59:14,038 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:59:14 BoogieIcfgContainer [2023-12-02 13:59:14,038 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 13:59:14,041 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 13:59:14,041 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 13:59:14,044 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 13:59:14,044 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:59:10" (1/3) ... [2023-12-02 13:59:14,044 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ef786af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:59:14, skipping insertion in model container [2023-12-02 13:59:14,044 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:59:11" (2/3) ... [2023-12-02 13:59:14,045 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ef786af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:59:14, skipping insertion in model container [2023-12-02 13:59:14,045 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:59:14" (3/3) ... [2023-12-02 13:59:14,046 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--md--md-cluster.ko-entry_point.cil.out.i [2023-12-02 13:59:14,089 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 13:59:14,089 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 13:59:14,141 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 13:59:14,146 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;@23f029c1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 13:59:14,147 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 13:59:14,152 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) [2023-12-02 13:59:14,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-12-02 13:59:14,166 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:59:14,166 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] [2023-12-02 13:59:14,167 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:59:14,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:59:14,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1859792704, now seen corresponding path program 1 times [2023-12-02 13:59:14,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:59:14,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999601313] [2023-12-02 13:59:14,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:59:14,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:59:14,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:59:14,812 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2023-12-02 13:59:14,812 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:59:14,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999601313] [2023-12-02 13:59:14,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999601313] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:59:14,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:59:14,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:59:14,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358481044] [2023-12-02 13:59:14,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:59:14,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:59:14,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:59:14,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:59:14,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:59:14,845 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) [2023-12-02 13:59:15,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:59:15,449 INFO L93 Difference]: Finished difference Result 1483 states and 2133 transitions. [2023-12-02 13:59:15,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:59:15,451 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (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 [2023-12-02 13:59:15,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:59:15,473 INFO L225 Difference]: With dead ends: 1483 [2023-12-02 13:59:15,473 INFO L226 Difference]: Without dead ends: 979 [2023-12-02 13:59:15,481 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 [2023-12-02 13:59:15,484 INFO L413 NwaCegarLoop]: 680 mSDtfsCounter, 670 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 13:59:15,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [670 Valid, 1346 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 13:59:15,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2023-12-02 13:59:15,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 976. [2023-12-02 13:59:15,599 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) [2023-12-02 13:59:15,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 1396 transitions. [2023-12-02 13:59:15,612 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 1396 transitions. Word has length 146 [2023-12-02 13:59:15,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:59:15,613 INFO L495 AbstractCegarLoop]: Abstraction has 976 states and 1396 transitions. [2023-12-02 13:59:15,613 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) [2023-12-02 13:59:15,614 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 1396 transitions. [2023-12-02 13:59:15,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-12-02 13:59:15,619 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:59:15,619 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] [2023-12-02 13:59:15,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 13:59:15,619 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:59:15,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:59:15,620 INFO L85 PathProgramCache]: Analyzing trace with hash 285702109, now seen corresponding path program 1 times [2023-12-02 13:59:15,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:59:15,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247726193] [2023-12-02 13:59:15,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:59:15,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:59:15,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:59:15,930 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2023-12-02 13:59:15,931 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:59:15,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247726193] [2023-12-02 13:59:15,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247726193] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:59:15,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:59:15,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:59:15,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002768252] [2023-12-02 13:59:15,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:59:15,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:59:15,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:59:15,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:59:15,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:59:15,935 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) [2023-12-02 13:59:16,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:59:16,702 INFO L93 Difference]: Finished difference Result 1584 states and 2240 transitions. [2023-12-02 13:59:16,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:59:16,703 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 [2023-12-02 13:59:16,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:59:16,717 INFO L225 Difference]: With dead ends: 1584 [2023-12-02 13:59:16,718 INFO L226 Difference]: Without dead ends: 1579 [2023-12-02 13:59:16,719 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 [2023-12-02 13:59:16,721 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, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 13:59:16,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 1321 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 13:59:16,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2023-12-02 13:59:16,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 1579. [2023-12-02 13:59:16,827 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) [2023-12-02 13:59:16,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 2233 transitions. [2023-12-02 13:59:16,845 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 2233 transitions. Word has length 157 [2023-12-02 13:59:16,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:59:16,846 INFO L495 AbstractCegarLoop]: Abstraction has 1579 states and 2233 transitions. [2023-12-02 13:59:16,847 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) [2023-12-02 13:59:16,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 2233 transitions. [2023-12-02 13:59:16,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-12-02 13:59:16,854 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:59:16,854 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] [2023-12-02 13:59:16,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 13:59:16,855 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:59:16,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:59:16,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1957588221, now seen corresponding path program 1 times [2023-12-02 13:59:16,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:59:16,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688700890] [2023-12-02 13:59:16,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:59:16,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:59:16,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:59:17,124 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2023-12-02 13:59:17,125 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:59:17,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688700890] [2023-12-02 13:59:17,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688700890] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:59:17,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:59:17,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:59:17,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421863689] [2023-12-02 13:59:17,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:59:17,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:59:17,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:59:17,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:59:17,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:59:17,128 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) [2023-12-02 13:59:18,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:59:18,007 INFO L93 Difference]: Finished difference Result 3397 states and 4768 transitions. [2023-12-02 13:59:18,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:59:18,007 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 [2023-12-02 13:59:18,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:59:18,018 INFO L225 Difference]: With dead ends: 3397 [2023-12-02 13:59:18,018 INFO L226 Difference]: Without dead ends: 1851 [2023-12-02 13:59:18,023 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 [2023-12-02 13:59:18,025 INFO L413 NwaCegarLoop]: 676 mSDtfsCounter, 146 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 13:59:18,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 1270 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 13:59:18,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1851 states. [2023-12-02 13:59:18,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1851 to 1844. [2023-12-02 13:59:18,086 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) [2023-12-02 13:59:18,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1844 states to 1844 states and 2572 transitions. [2023-12-02 13:59:18,097 INFO L78 Accepts]: Start accepts. Automaton has 1844 states and 2572 transitions. Word has length 173 [2023-12-02 13:59:18,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:59:18,098 INFO L495 AbstractCegarLoop]: Abstraction has 1844 states and 2572 transitions. [2023-12-02 13:59:18,098 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) [2023-12-02 13:59:18,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1844 states and 2572 transitions. [2023-12-02 13:59:18,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2023-12-02 13:59:18,102 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:59:18,102 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] [2023-12-02 13:59:18,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 13:59:18,102 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:59:18,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:59:18,103 INFO L85 PathProgramCache]: Analyzing trace with hash 960304375, now seen corresponding path program 1 times [2023-12-02 13:59:18,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:59:18,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492612183] [2023-12-02 13:59:18,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:59:18,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:59:18,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:59:19,030 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2023-12-02 13:59:19,031 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:59:19,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492612183] [2023-12-02 13:59:19,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492612183] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:59:19,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:59:19,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 13:59:19,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832383755] [2023-12-02 13:59:19,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:59:19,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:59:19,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:59:19,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:59:19,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:59:19,034 INFO L87 Difference]: Start difference. First operand 1844 states and 2572 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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) [2023-12-02 13:59:19,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:59:19,633 INFO L93 Difference]: Finished difference Result 2589 states and 3593 transitions. [2023-12-02 13:59:19,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:59:19,637 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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 [2023-12-02 13:59:19,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:59:19,653 INFO L225 Difference]: With dead ends: 2589 [2023-12-02 13:59:19,653 INFO L226 Difference]: Without dead ends: 2584 [2023-12-02 13:59:19,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:59:19,655 INFO L413 NwaCegarLoop]: 727 mSDtfsCounter, 518 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 1693 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 13:59:19,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [562 Valid, 1693 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 13:59:19,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2023-12-02 13:59:19,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 2582. [2023-12-02 13:59:19,769 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) [2023-12-02 13:59:19,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2582 states to 2582 states and 3582 transitions. [2023-12-02 13:59:19,782 INFO L78 Accepts]: Start accepts. Automaton has 2582 states and 3582 transitions. Word has length 215 [2023-12-02 13:59:19,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:59:19,783 INFO L495 AbstractCegarLoop]: Abstraction has 2582 states and 3582 transitions. [2023-12-02 13:59:19,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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) [2023-12-02 13:59:19,784 INFO L276 IsEmpty]: Start isEmpty. Operand 2582 states and 3582 transitions. [2023-12-02 13:59:19,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2023-12-02 13:59:19,787 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:59:19,788 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] [2023-12-02 13:59:19,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 13:59:19,788 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:59:19,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:59:19,788 INFO L85 PathProgramCache]: Analyzing trace with hash 401666502, now seen corresponding path program 1 times [2023-12-02 13:59:19,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:59:19,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991699689] [2023-12-02 13:59:19,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:59:19,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:59:19,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:59:20,393 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2023-12-02 13:59:20,393 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:59:20,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991699689] [2023-12-02 13:59:20,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991699689] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:59:20,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332679763] [2023-12-02 13:59:20,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:59:20,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:59:20,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ed4c15-4ac8-408f-b865-c94999d214ca/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:59:20,396 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ed4c15-4ac8-408f-b865-c94999d214ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:59:20,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ed4c15-4ac8-408f-b865-c94999d214ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 13:59:21,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:59:21,106 INFO L262 TraceCheckSpWp]: Trace formula consists of 1981 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 13:59:21,123 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:59:21,188 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 221 proven. 0 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2023-12-02 13:59:21,189 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:59:21,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332679763] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:59:21,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:59:21,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2023-12-02 13:59:21,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481485149] [2023-12-02 13:59:21,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:59:21,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:59:21,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:59:21,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:59:21,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-12-02 13:59:21,191 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) [2023-12-02 13:59:22,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:59:22,306 INFO L93 Difference]: Finished difference Result 5172 states and 7197 transitions. [2023-12-02 13:59:22,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 13:59:22,307 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 [2023-12-02 13:59:22,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:59:22,319 INFO L225 Difference]: With dead ends: 5172 [2023-12-02 13:59:22,319 INFO L226 Difference]: Without dead ends: 2589 [2023-12-02 13:59:22,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-12-02 13:59:22,326 INFO L413 NwaCegarLoop]: 657 mSDtfsCounter, 3 mSDsluCounter, 2597 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:59:22,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 3254 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 13:59:22,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2589 states. [2023-12-02 13:59:22,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2589 to 2589. [2023-12-02 13:59:22,413 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) [2023-12-02 13:59:22,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2589 states to 2589 states and 3589 transitions. [2023-12-02 13:59:22,423 INFO L78 Accepts]: Start accepts. Automaton has 2589 states and 3589 transitions. Word has length 226 [2023-12-02 13:59:22,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:59:22,424 INFO L495 AbstractCegarLoop]: Abstraction has 2589 states and 3589 transitions. [2023-12-02 13:59:22,424 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) [2023-12-02 13:59:22,424 INFO L276 IsEmpty]: Start isEmpty. Operand 2589 states and 3589 transitions. [2023-12-02 13:59:22,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2023-12-02 13:59:22,428 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:59:22,428 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] [2023-12-02 13:59:22,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ed4c15-4ac8-408f-b865-c94999d214ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 13:59:22,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ed4c15-4ac8-408f-b865-c94999d214ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:59:22,634 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:59:22,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:59:22,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1179257588, now seen corresponding path program 1 times [2023-12-02 13:59:22,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:59:22,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584934369] [2023-12-02 13:59:22,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:59:22,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:59:22,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:59:23,359 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 8 proven. 73 refuted. 0 times theorem prover too weak. 641 trivial. 0 not checked. [2023-12-02 13:59:23,360 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:59:23,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584934369] [2023-12-02 13:59:23,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584934369] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:59:23,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433725794] [2023-12-02 13:59:23,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:59:23,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:59:23,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ed4c15-4ac8-408f-b865-c94999d214ca/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:59:23,361 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ed4c15-4ac8-408f-b865-c94999d214ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:59:23,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87ed4c15-4ac8-408f-b865-c94999d214ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 13:59:24,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:59:24,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-02 13:59:24,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:59:24,796 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 277 proven. 1 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2023-12-02 13:59:24,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:59:25,149 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 8 proven. 73 refuted. 0 times theorem prover too weak. 641 trivial. 0 not checked. [2023-12-02 13:59:25,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433725794] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:59:25,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1971027480] [2023-12-02 13:59:25,174 INFO L159 IcfgInterpreter]: Started Sifa with 98 locations of interest [2023-12-02 13:59:25,174 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:59:25,178 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:59:25,183 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:59:25,183 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs