./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_4ff72c34-36c3-4771-be25-fb6847e4d3d2/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ff72c34-36c3-4771-be25-fb6847e4d3d2/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ff72c34-36c3-4771-be25-fb6847e4d3d2/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ff72c34-36c3-4771-be25-fb6847e4d3d2/bin/utaipan-verify-SwPr7d2a91/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_4ff72c34-36c3-4771-be25-fb6847e4d3d2/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ff72c34-36c3-4771-be25-fb6847e4d3d2/bin/utaipan-verify-SwPr7d2a91 --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 [2023-11-25 00:03:37,569 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:03:37,675 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ff72c34-36c3-4771-be25-fb6847e4d3d2/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-25 00:03:37,688 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:03:37,689 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:03:37,739 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:03:37,740 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:03:37,740 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:03:37,741 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:03:37,749 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:03:37,749 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:03:37,750 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:03:37,750 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:03:37,751 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-25 00:03:37,753 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:03:37,753 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:03:37,753 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-25 00:03:37,754 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-25 00:03:37,754 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:03:37,755 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-25 00:03:37,755 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-25 00:03:37,756 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-25 00:03:37,756 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:03:37,757 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-25 00:03:37,757 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-25 00:03:37,758 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:03:37,758 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-25 00:03:37,759 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:03:37,759 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-25 00:03:37,759 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-25 00:03:37,760 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:03:37,760 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:03:37,761 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:03:37,761 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:03:37,761 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:03:37,762 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:03:37,762 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:03:37,762 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-25 00:03:37,762 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-25 00:03:37,763 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-25 00:03:37,763 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:03:37,763 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-25 00:03:37,763 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:03:37,764 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:03:37,764 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_4ff72c34-36c3-4771-be25-fb6847e4d3d2/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ff72c34-36c3-4771-be25-fb6847e4d3d2/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 03d5d1a576959110e79c00ca2825754bce7439905d85699b470a90adbbee10ad [2023-11-25 00:03:38,069 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:03:38,090 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:03:38,092 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:03:38,093 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:03:38,094 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:03:38,095 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ff72c34-36c3-4771-be25-fb6847e4d3d2/bin/utaipan-verify-SwPr7d2a91/../../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 [2023-11-25 00:03:41,146 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:03:41,733 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:03:41,734 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ff72c34-36c3-4771-be25-fb6847e4d3d2/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 [2023-11-25 00:03:41,776 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ff72c34-36c3-4771-be25-fb6847e4d3d2/bin/utaipan-verify-SwPr7d2a91/data/9aa3a145a/eefa7d0607674c6b9267e162d0b413e1/FLAGc137bbc28 [2023-11-25 00:03:41,792 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ff72c34-36c3-4771-be25-fb6847e4d3d2/bin/utaipan-verify-SwPr7d2a91/data/9aa3a145a/eefa7d0607674c6b9267e162d0b413e1 [2023-11-25 00:03:41,795 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:03:41,797 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:03:41,799 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:03:41,799 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:03:41,805 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:03:41,808 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:03:41" (1/1) ... [2023-11-25 00:03:41,810 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27fb769f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:41, skipping insertion in model container [2023-11-25 00:03:41,810 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:03:41" (1/1) ... [2023-11-25 00:03:41,937 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:03:43,274 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_4ff72c34-36c3-4771-be25-fb6847e4d3d2/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] [2023-11-25 00:03:43,311 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:03:43,333 INFO L202 MainTranslator]: Completed pre-run [2023-11-25 00:03:43,547 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] [2023-11-25 00:03:43,549 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] [2023-11-25 00:03:43,551 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("bsrq %1,%q0": "+r" (bitpos): "rm" (x)); [4182] [2023-11-25 00:03:43,967 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_4ff72c34-36c3-4771-be25-fb6847e4d3d2/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] [2023-11-25 00:03:43,990 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:03:44,150 WARN L675 CHandler]: The function sprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:03:44,158 INFO L206 MainTranslator]: Completed translation [2023-11-25 00:03:44,159 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:44 WrapperNode [2023-11-25 00:03:44,159 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:03:44,160 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-25 00:03:44,161 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-25 00:03:44,161 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-25 00:03:44,170 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:44" (1/1) ... [2023-11-25 00:03:44,254 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:44" (1/1) ... [2023-11-25 00:03:44,377 INFO L138 Inliner]: procedures = 151, calls = 834, calls flagged for inlining = 67, calls inlined = 53, statements flattened = 1881 [2023-11-25 00:03:44,378 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-25 00:03:44,379 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-25 00:03:44,379 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-25 00:03:44,379 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-25 00:03:44,388 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:44" (1/1) ... [2023-11-25 00:03:44,389 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:44" (1/1) ... [2023-11-25 00:03:44,414 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:44" (1/1) ... [2023-11-25 00:03:44,418 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:44" (1/1) ... [2023-11-25 00:03:44,503 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:44" (1/1) ... [2023-11-25 00:03:44,532 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:44" (1/1) ... [2023-11-25 00:03:44,545 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:44" (1/1) ... [2023-11-25 00:03:44,570 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:44" (1/1) ... [2023-11-25 00:03:44,599 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-25 00:03:44,601 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-25 00:03:44,601 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-25 00:03:44,601 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-25 00:03:44,602 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:44" (1/1) ... [2023-11-25 00:03:44,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:03:44,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ff72c34-36c3-4771-be25-fb6847e4d3d2/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:03:44,640 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ff72c34-36c3-4771-be25-fb6847e4d3d2/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-25 00:03:44,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ff72c34-36c3-4771-be25-fb6847e4d3d2/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-25 00:03:44,699 INFO L130 BoogieDeclarations]: Found specification of procedure dlm_lock_sync [2023-11-25 00:03:44,699 INFO L138 BoogieDeclarations]: Found implementation of procedure dlm_lock_sync [2023-11-25 00:03:44,701 INFO L130 BoogieDeclarations]: Found specification of procedure lockres_free [2023-11-25 00:03:44,702 INFO L138 BoogieDeclarations]: Found implementation of procedure lockres_free [2023-11-25 00:03:44,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-25 00:03:44,702 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-25 00:03:44,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-25 00:03:44,702 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-25 00:03:44,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-25 00:03:44,703 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-25 00:03:44,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-11-25 00:03:44,703 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-11-25 00:03:44,703 INFO L130 BoogieDeclarations]: Found specification of procedure dlm_release_lockspace [2023-11-25 00:03:44,704 INFO L138 BoogieDeclarations]: Found implementation of procedure dlm_release_lockspace [2023-11-25 00:03:44,704 INFO L130 BoogieDeclarations]: Found specification of procedure lock_comm [2023-11-25 00:03:44,704 INFO L138 BoogieDeclarations]: Found implementation of procedure lock_comm [2023-11-25 00:03:44,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-11-25 00:03:44,705 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-11-25 00:03:44,705 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-25 00:03:44,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-25 00:03:44,705 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2023-11-25 00:03:44,706 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2023-11-25 00:03:44,707 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put [2023-11-25 00:03:44,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put [2023-11-25 00:03:44,707 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-25 00:03:44,708 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-25 00:03:44,708 INFO L130 BoogieDeclarations]: Found specification of procedure init_completion [2023-11-25 00:03:44,708 INFO L138 BoogieDeclarations]: Found implementation of procedure init_completion [2023-11-25 00:03:44,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-25 00:03:44,709 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-25 00:03:44,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-25 00:03:44,710 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2023-11-25 00:03:44,710 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2023-11-25 00:03:44,710 INFO L130 BoogieDeclarations]: Found specification of procedure md_wakeup_thread [2023-11-25 00:03:44,711 INFO L138 BoogieDeclarations]: Found implementation of procedure md_wakeup_thread [2023-11-25 00:03:44,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-25 00:03:44,711 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-25 00:03:44,711 INFO L130 BoogieDeclarations]: Found specification of procedure bitmap_copy_from_slot [2023-11-25 00:03:44,711 INFO L138 BoogieDeclarations]: Found implementation of procedure bitmap_copy_from_slot [2023-11-25 00:03:44,711 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2023-11-25 00:03:44,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2023-11-25 00:03:44,712 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-25 00:03:44,712 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-25 00:03:44,712 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-25 00:03:44,712 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2023-11-25 00:03:44,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2023-11-25 00:03:44,713 INFO L130 BoogieDeclarations]: Found specification of procedure complete [2023-11-25 00:03:44,713 INFO L138 BoogieDeclarations]: Found implementation of procedure complete [2023-11-25 00:03:44,713 INFO L130 BoogieDeclarations]: Found specification of procedure md_register_thread [2023-11-25 00:03:44,713 INFO L138 BoogieDeclarations]: Found implementation of procedure md_register_thread [2023-11-25 00:03:44,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-25 00:03:44,714 INFO L130 BoogieDeclarations]: Found specification of procedure md_unregister_thread [2023-11-25 00:03:44,714 INFO L138 BoogieDeclarations]: Found implementation of procedure md_unregister_thread [2023-11-25 00:03:44,714 INFO L130 BoogieDeclarations]: Found specification of procedure wait_for_completion [2023-11-25 00:03:44,715 INFO L138 BoogieDeclarations]: Found implementation of procedure wait_for_completion [2023-11-25 00:03:44,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-25 00:03:44,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-25 00:03:44,715 INFO L130 BoogieDeclarations]: Found specification of procedure sprintf [2023-11-25 00:03:44,716 INFO L130 BoogieDeclarations]: Found specification of procedure resync_send [2023-11-25 00:03:44,717 INFO L138 BoogieDeclarations]: Found implementation of procedure resync_send [2023-11-25 00:03:44,717 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2023-11-25 00:03:44,717 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2023-11-25 00:03:44,718 INFO L130 BoogieDeclarations]: Found specification of procedure lockres_init [2023-11-25 00:03:44,718 INFO L138 BoogieDeclarations]: Found implementation of procedure lockres_init [2023-11-25 00:03:44,718 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-25 00:03:44,718 INFO L130 BoogieDeclarations]: Found specification of procedure unlock_comm [2023-11-25 00:03:44,718 INFO L138 BoogieDeclarations]: Found implementation of procedure unlock_comm [2023-11-25 00:03:44,718 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2023-11-25 00:03:44,719 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2023-11-25 00:03:44,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-25 00:03:44,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-25 00:03:44,719 INFO L130 BoogieDeclarations]: Found specification of procedure resync_info_update [2023-11-25 00:03:44,719 INFO L138 BoogieDeclarations]: Found implementation of procedure resync_info_update [2023-11-25 00:03:44,720 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-25 00:03:44,720 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-25 00:03:44,720 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2023-11-25 00:03:44,721 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2023-11-25 00:03:44,721 INFO L130 BoogieDeclarations]: Found specification of procedure __sendmsg [2023-11-25 00:03:44,721 INFO L138 BoogieDeclarations]: Found implementation of procedure __sendmsg [2023-11-25 00:03:44,721 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2023-11-25 00:03:44,722 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2023-11-25 00:03:44,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-25 00:03:44,723 INFO L130 BoogieDeclarations]: Found specification of procedure pretty_uuid [2023-11-25 00:03:44,723 INFO L138 BoogieDeclarations]: Found implementation of procedure pretty_uuid [2023-11-25 00:03:44,723 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-25 00:03:44,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-25 00:03:44,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-25 00:03:44,724 INFO L130 BoogieDeclarations]: Found specification of procedure sendmsg [2023-11-25 00:03:44,724 INFO L138 BoogieDeclarations]: Found implementation of procedure sendmsg [2023-11-25 00:03:44,724 INFO L130 BoogieDeclarations]: Found specification of procedure dlm_unlock_sync [2023-11-25 00:03:44,724 INFO L138 BoogieDeclarations]: Found implementation of procedure dlm_unlock_sync [2023-11-25 00:03:45,234 INFO L241 CfgBuilder]: Building ICFG [2023-11-25 00:03:45,237 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-25 00:03:45,427 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-25 00:03:47,059 INFO L282 CfgBuilder]: Performing block encoding [2023-11-25 00:03:47,469 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-25 00:03:47,470 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-25 00:03:47,475 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:03:47 BoogieIcfgContainer [2023-11-25 00:03:47,476 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-25 00:03:47,480 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-25 00:03:47,480 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-25 00:03:47,484 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-25 00:03:47,485 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 12:03:41" (1/3) ... [2023-11-25 00:03:47,486 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dac5e2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:03:47, skipping insertion in model container [2023-11-25 00:03:47,486 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:44" (2/3) ... [2023-11-25 00:03:47,488 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dac5e2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:03:47, skipping insertion in model container [2023-11-25 00:03:47,488 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:03:47" (3/3) ... [2023-11-25 00:03:47,490 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--md--md-cluster.ko-entry_point.cil.out.i [2023-11-25 00:03:47,513 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-25 00:03:47,513 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-25 00:03:47,603 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-25 00:03:47,611 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;@1fb1c1d0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-25 00:03:47,612 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-25 00:03:47,621 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) [2023-11-25 00:03:47,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-11-25 00:03:47,650 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:47,651 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] [2023-11-25 00:03:47,652 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:03:47,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:47,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1859792704, now seen corresponding path program 1 times [2023-11-25 00:03:47,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:47,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684204528] [2023-11-25 00:03:47,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:47,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:48,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:48,886 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2023-11-25 00:03:48,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:48,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684204528] [2023-11-25 00:03:48,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684204528] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:03:48,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:03:48,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:03:48,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879632555] [2023-11-25 00:03:48,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:03:48,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:03:48,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:48,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:03:48,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:03:48,947 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) [2023-11-25 00:03:49,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:49,815 INFO L93 Difference]: Finished difference Result 1483 states and 2133 transitions. [2023-11-25 00:03:49,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:03:49,818 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 [2023-11-25 00:03:49,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:49,857 INFO L225 Difference]: With dead ends: 1483 [2023-11-25 00:03:49,859 INFO L226 Difference]: Without dead ends: 979 [2023-11-25 00:03:49,873 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 [2023-11-25 00:03:49,881 INFO L413 NwaCegarLoop]: 680 mSDtfsCounter, 670 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:49,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [670 Valid, 1346 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-25 00:03:49,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2023-11-25 00:03:50,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 976. [2023-11-25 00:03:50,056 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) [2023-11-25 00:03:50,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 1396 transitions. [2023-11-25 00:03:50,072 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 1396 transitions. Word has length 146 [2023-11-25 00:03:50,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:50,082 INFO L495 AbstractCegarLoop]: Abstraction has 976 states and 1396 transitions. [2023-11-25 00:03:50,082 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) [2023-11-25 00:03:50,082 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 1396 transitions. [2023-11-25 00:03:50,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-11-25 00:03:50,094 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:50,094 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] [2023-11-25 00:03:50,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-25 00:03:50,095 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:03:50,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:50,095 INFO L85 PathProgramCache]: Analyzing trace with hash 285702109, now seen corresponding path program 1 times [2023-11-25 00:03:50,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:50,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276950177] [2023-11-25 00:03:50,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:50,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:50,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:50,493 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2023-11-25 00:03:50,496 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:50,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276950177] [2023-11-25 00:03:50,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276950177] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:03:50,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:03:50,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:03:50,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970168276] [2023-11-25 00:03:50,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:03:50,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:03:50,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:50,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:03:50,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:03:50,501 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) [2023-11-25 00:03:51,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:51,420 INFO L93 Difference]: Finished difference Result 1584 states and 2240 transitions. [2023-11-25 00:03:51,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:03:51,421 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 [2023-11-25 00:03:51,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:51,435 INFO L225 Difference]: With dead ends: 1584 [2023-11-25 00:03:51,436 INFO L226 Difference]: Without dead ends: 1579 [2023-11-25 00:03:51,437 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 [2023-11-25 00:03:51,439 INFO L413 NwaCegarLoop]: 699 mSDtfsCounter, 438 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.8s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:51,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 1321 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-25 00:03:51,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2023-11-25 00:03:51,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 1579. [2023-11-25 00:03:51,529 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) [2023-11-25 00:03:51,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 2233 transitions. [2023-11-25 00:03:51,545 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 2233 transitions. Word has length 157 [2023-11-25 00:03:51,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:51,548 INFO L495 AbstractCegarLoop]: Abstraction has 1579 states and 2233 transitions. [2023-11-25 00:03:51,549 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) [2023-11-25 00:03:51,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 2233 transitions. [2023-11-25 00:03:51,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-11-25 00:03:51,555 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:51,555 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] [2023-11-25 00:03:51,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-25 00:03:51,556 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:03:51,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:51,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1957588221, now seen corresponding path program 1 times [2023-11-25 00:03:51,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:51,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859048907] [2023-11-25 00:03:51,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:51,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:51,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:51,850 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2023-11-25 00:03:51,850 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:51,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859048907] [2023-11-25 00:03:51,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859048907] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:03:51,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:03:51,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:03:51,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787495818] [2023-11-25 00:03:51,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:03:51,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:03:51,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:51,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:03:51,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:03:51,854 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) [2023-11-25 00:03:52,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:52,931 INFO L93 Difference]: Finished difference Result 3397 states and 4768 transitions. [2023-11-25 00:03:52,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:03:52,932 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 [2023-11-25 00:03:52,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:52,947 INFO L225 Difference]: With dead ends: 3397 [2023-11-25 00:03:52,948 INFO L226 Difference]: Without dead ends: 1851 [2023-11-25 00:03:52,955 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 [2023-11-25 00:03:52,956 INFO L413 NwaCegarLoop]: 676 mSDtfsCounter, 146 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:52,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 1270 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-25 00:03:52,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1851 states. [2023-11-25 00:03:53,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1851 to 1844. [2023-11-25 00:03:53,060 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) [2023-11-25 00:03:53,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1844 states to 1844 states and 2572 transitions. [2023-11-25 00:03:53,077 INFO L78 Accepts]: Start accepts. Automaton has 1844 states and 2572 transitions. Word has length 173 [2023-11-25 00:03:53,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:53,078 INFO L495 AbstractCegarLoop]: Abstraction has 1844 states and 2572 transitions. [2023-11-25 00:03:53,078 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) [2023-11-25 00:03:53,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1844 states and 2572 transitions. [2023-11-25 00:03:53,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2023-11-25 00:03:53,084 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:53,084 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] [2023-11-25 00:03:53,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-25 00:03:53,084 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:03:53,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:53,085 INFO L85 PathProgramCache]: Analyzing trace with hash 960304375, now seen corresponding path program 1 times [2023-11-25 00:03:53,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:53,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311665884] [2023-11-25 00:03:53,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:53,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:53,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:54,890 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2023-11-25 00:03:54,893 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:54,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311665884] [2023-11-25 00:03:54,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311665884] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:03:54,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:03:54,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:03:54,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064025477] [2023-11-25 00:03:54,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:03:54,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:03:54,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:54,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:03:54,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:03:54,898 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) [2023-11-25 00:03:55,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:55,848 INFO L93 Difference]: Finished difference Result 2589 states and 3593 transitions. [2023-11-25 00:03:55,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-25 00:03:55,850 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 [2023-11-25 00:03:55,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:55,871 INFO L225 Difference]: With dead ends: 2589 [2023-11-25 00:03:55,872 INFO L226 Difference]: Without dead ends: 2584 [2023-11-25 00:03:55,874 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 [2023-11-25 00:03:55,877 INFO L413 NwaCegarLoop]: 727 mSDtfsCounter, 518 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:55,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [562 Valid, 1693 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-25 00:03:55,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2023-11-25 00:03:56,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 2582. [2023-11-25 00:03:56,036 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) [2023-11-25 00:03:56,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2582 states to 2582 states and 3582 transitions. [2023-11-25 00:03:56,059 INFO L78 Accepts]: Start accepts. Automaton has 2582 states and 3582 transitions. Word has length 215 [2023-11-25 00:03:56,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:56,062 INFO L495 AbstractCegarLoop]: Abstraction has 2582 states and 3582 transitions. [2023-11-25 00:03:56,062 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) [2023-11-25 00:03:56,062 INFO L276 IsEmpty]: Start isEmpty. Operand 2582 states and 3582 transitions. [2023-11-25 00:03:56,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2023-11-25 00:03:56,070 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:56,070 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] [2023-11-25 00:03:56,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-25 00:03:56,071 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:03:56,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:56,071 INFO L85 PathProgramCache]: Analyzing trace with hash 401666502, now seen corresponding path program 1 times [2023-11-25 00:03:56,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:56,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466198651] [2023-11-25 00:03:56,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:56,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:56,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:57,079 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2023-11-25 00:03:57,080 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:57,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466198651] [2023-11-25 00:03:57,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466198651] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:03:57,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085201741] [2023-11-25 00:03:57,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:57,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:57,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ff72c34-36c3-4771-be25-fb6847e4d3d2/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:03:57,085 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ff72c34-36c3-4771-be25-fb6847e4d3d2/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:03:57,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ff72c34-36c3-4771-be25-fb6847e4d3d2/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-25 00:03:57,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:58,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 1981 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-25 00:03:58,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:03:58,124 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 221 proven. 0 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2023-11-25 00:03:58,124 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:03:58,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085201741] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:03:58,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:03:58,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2023-11-25 00:03:58,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578129712] [2023-11-25 00:03:58,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:03:58,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-25 00:03:58,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:58,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-25 00:03:58,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-25 00:03:58,127 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) [2023-11-25 00:03:59,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:59,494 INFO L93 Difference]: Finished difference Result 5172 states and 7197 transitions. [2023-11-25 00:03:59,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-25 00:03:59,495 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 [2023-11-25 00:03:59,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:59,514 INFO L225 Difference]: With dead ends: 5172 [2023-11-25 00:03:59,514 INFO L226 Difference]: Without dead ends: 2589 [2023-11-25 00:03:59,524 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 [2023-11-25 00:03:59,525 INFO L413 NwaCegarLoop]: 657 mSDtfsCounter, 3 mSDsluCounter, 2597 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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, 1.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:59,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 3254 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-25 00:03:59,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2589 states. [2023-11-25 00:03:59,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2589 to 2589. [2023-11-25 00:03:59,673 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) [2023-11-25 00:03:59,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2589 states to 2589 states and 3589 transitions. [2023-11-25 00:03:59,691 INFO L78 Accepts]: Start accepts. Automaton has 2589 states and 3589 transitions. Word has length 226 [2023-11-25 00:03:59,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:59,692 INFO L495 AbstractCegarLoop]: Abstraction has 2589 states and 3589 transitions. [2023-11-25 00:03:59,692 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) [2023-11-25 00:03:59,692 INFO L276 IsEmpty]: Start isEmpty. Operand 2589 states and 3589 transitions. [2023-11-25 00:03:59,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2023-11-25 00:03:59,699 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:59,699 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] [2023-11-25 00:03:59,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ff72c34-36c3-4771-be25-fb6847e4d3d2/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-25 00:03:59,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ff72c34-36c3-4771-be25-fb6847e4d3d2/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:59,910 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:03:59,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:59,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1179257588, now seen corresponding path program 1 times [2023-11-25 00:03:59,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:59,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533595839] [2023-11-25 00:03:59,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:59,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:04:00,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:04:01,231 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 8 proven. 73 refuted. 0 times theorem prover too weak. 641 trivial. 0 not checked. [2023-11-25 00:04:01,231 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:04:01,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533595839] [2023-11-25 00:04:01,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533595839] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:04:01,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45319995] [2023-11-25 00:04:01,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:01,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:04:01,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ff72c34-36c3-4771-be25-fb6847e4d3d2/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:04:01,250 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ff72c34-36c3-4771-be25-fb6847e4d3d2/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:04:01,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ff72c34-36c3-4771-be25-fb6847e4d3d2/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-25 00:04:03,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:04:03,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-25 00:04:03,458 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:04:03,551 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 277 proven. 1 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2023-11-25 00:04:03,551 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:04:03,973 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 8 proven. 73 refuted. 0 times theorem prover too weak. 641 trivial. 0 not checked. [2023-11-25 00:04:03,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45319995] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:04:03,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [194857020] [2023-11-25 00:04:04,000 INFO L159 IcfgInterpreter]: Started Sifa with 98 locations of interest [2023-11-25 00:04:04,000 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:04:04,004 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:04:04,010 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:04:04,011 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs