./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/sll2c_append_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 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_3bbe54fa-2a1f-4a54-9da1-814909b70d75/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bbe54fa-2a1f-4a54-9da1-814909b70d75/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bbe54fa-2a1f-4a54-9da1-814909b70d75/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bbe54fa-2a1f-4a54-9da1-814909b70d75/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/sll2c_append_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bbe54fa-2a1f-4a54-9da1-814909b70d75/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bbe54fa-2a1f-4a54-9da1-814909b70d75/bin/utaipan-verify-mE87zJ7Ire --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 32bit --witnessprinter.graph.data.programhash b335af75f55d322161e6a270bf4669ab290ae0e9da4bc480724c7d5e3b79fdab --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:33:47,834 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:33:47,918 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bbe54fa-2a1f-4a54-9da1-814909b70d75/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 20:33:47,925 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:33:47,926 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:33:47,957 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:33:47,958 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:33:47,959 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:33:47,960 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:33:47,960 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:33:47,961 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:33:47,962 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:33:47,962 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:33:47,963 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:33:47,963 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:33:47,964 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:33:47,965 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:33:47,965 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:33:47,966 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:33:47,966 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:33:47,967 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:33:47,968 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:33:47,969 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:33:47,969 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:33:47,970 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 20:33:47,970 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:33:47,971 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 20:33:47,971 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:33:47,972 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:33:47,973 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:33:47,973 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:33:47,974 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 20:33:47,974 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:33:47,975 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:33:47,975 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:33:47,975 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:33:47,975 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:33:47,976 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:33:47,976 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:33:47,976 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:33:47,977 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:33:47,977 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:33:47,977 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:33:47,978 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:33:47,978 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:33:47,978 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:33:47,978 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:33:47,979 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_3bbe54fa-2a1f-4a54-9da1-814909b70d75/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bbe54fa-2a1f-4a54-9da1-814909b70d75/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b335af75f55d322161e6a270bf4669ab290ae0e9da4bc480724c7d5e3b79fdab [2023-11-23 20:33:48,263 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:33:48,293 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:33:48,296 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:33:48,298 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:33:48,299 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:33:48,301 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bbe54fa-2a1f-4a54-9da1-814909b70d75/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/list-simple/sll2c_append_equal.i [2023-11-23 20:33:51,800 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:33:52,114 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:33:52,115 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bbe54fa-2a1f-4a54-9da1-814909b70d75/sv-benchmarks/c/list-simple/sll2c_append_equal.i [2023-11-23 20:33:52,137 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bbe54fa-2a1f-4a54-9da1-814909b70d75/bin/utaipan-verify-mE87zJ7Ire/data/1cf3269a3/23b33a203cf546fdb72b2d3b16e466c0/FLAG55e5856c2 [2023-11-23 20:33:52,156 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bbe54fa-2a1f-4a54-9da1-814909b70d75/bin/utaipan-verify-mE87zJ7Ire/data/1cf3269a3/23b33a203cf546fdb72b2d3b16e466c0 [2023-11-23 20:33:52,159 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:33:52,161 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:33:52,163 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:33:52,164 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:33:52,171 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:33:52,172 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:33:52" (1/1) ... [2023-11-23 20:33:52,173 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c4911f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:52, skipping insertion in model container [2023-11-23 20:33:52,174 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:33:52" (1/1) ... [2023-11-23 20:33:52,262 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:33:52,710 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_3bbe54fa-2a1f-4a54-9da1-814909b70d75/sv-benchmarks/c/list-simple/sll2c_append_equal.i[24433,24446] [2023-11-23 20:33:52,722 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:33:52,737 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:33:52,828 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_3bbe54fa-2a1f-4a54-9da1-814909b70d75/sv-benchmarks/c/list-simple/sll2c_append_equal.i[24433,24446] [2023-11-23 20:33:52,833 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:33:52,878 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:33:52,879 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:52 WrapperNode [2023-11-23 20:33:52,879 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:33:52,881 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:33:52,881 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:33:52,882 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:33:52,891 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:52" (1/1) ... [2023-11-23 20:33:52,938 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:52" (1/1) ... [2023-11-23 20:33:52,983 INFO L138 Inliner]: procedures = 127, calls = 42, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 139 [2023-11-23 20:33:52,984 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:33:52,984 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:33:52,985 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:33:52,985 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:33:52,997 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:52" (1/1) ... [2023-11-23 20:33:52,997 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:52" (1/1) ... [2023-11-23 20:33:53,002 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:52" (1/1) ... [2023-11-23 20:33:53,002 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:52" (1/1) ... [2023-11-23 20:33:53,017 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:52" (1/1) ... [2023-11-23 20:33:53,022 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:52" (1/1) ... [2023-11-23 20:33:53,040 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:52" (1/1) ... [2023-11-23 20:33:53,042 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:52" (1/1) ... [2023-11-23 20:33:53,046 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:33:53,047 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:33:53,080 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:33:53,080 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:33:53,081 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:52" (1/1) ... [2023-11-23 20:33:53,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:33:53,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bbe54fa-2a1f-4a54-9da1-814909b70d75/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:53,134 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bbe54fa-2a1f-4a54-9da1-814909b70d75/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:33:53,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bbe54fa-2a1f-4a54-9da1-814909b70d75/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:33:53,177 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 20:33:53,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 20:33:53,177 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-11-23 20:33:53,177 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-11-23 20:33:53,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 20:33:53,178 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:33:53,178 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 20:33:53,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 20:33:53,178 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 20:33:53,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 20:33:53,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 20:33:53,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:33:53,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:33:53,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:33:53,347 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:33:53,350 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:33:53,697 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:33:53,785 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:33:53,786 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-23 20:33:53,788 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:33:53 BoogieIcfgContainer [2023-11-23 20:33:53,788 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:33:53,791 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:33:53,793 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:33:53,797 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:33:53,798 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:33:52" (1/3) ... [2023-11-23 20:33:53,799 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58eceda2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:33:53, skipping insertion in model container [2023-11-23 20:33:53,800 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:52" (2/3) ... [2023-11-23 20:33:53,802 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58eceda2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:33:53, skipping insertion in model container [2023-11-23 20:33:53,803 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:33:53" (3/3) ... [2023-11-23 20:33:53,804 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2c_append_equal.i [2023-11-23 20:33:53,829 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:33:53,830 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 20:33:53,901 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:33:53,910 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;@481fac6a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:33:53,910 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 20:33:53,915 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 20:33:53,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-23 20:33:53,926 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:53,927 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:33:53,927 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:53,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:53,936 INFO L85 PathProgramCache]: Analyzing trace with hash 399683977, now seen corresponding path program 1 times [2023-11-23 20:33:53,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:53,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943185286] [2023-11-23 20:33:53,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:53,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:54,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:54,584 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 20:33:54,585 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:54,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943185286] [2023-11-23 20:33:54,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943185286] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:54,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:33:54,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:33:54,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416047249] [2023-11-23 20:33:54,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:54,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:33:54,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:54,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:33:54,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:33:54,653 INFO L87 Difference]: Start difference. First operand has 28 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 20:33:54,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:54,714 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2023-11-23 20:33:54,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:33:54,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2023-11-23 20:33:54,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:54,726 INFO L225 Difference]: With dead ends: 53 [2023-11-23 20:33:54,727 INFO L226 Difference]: Without dead ends: 25 [2023-11-23 20:33:54,731 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 [2023-11-23 20:33:54,738 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 1 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:54,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 56 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 20:33:54,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-23 20:33:54,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2023-11-23 20:33:54,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 20:33:54,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2023-11-23 20:33:54,794 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 17 [2023-11-23 20:33:54,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:54,795 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2023-11-23 20:33:54,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 20:33:54,796 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2023-11-23 20:33:54,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-23 20:33:54,799 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:54,799 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:33:54,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 20:33:54,801 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:54,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:54,802 INFO L85 PathProgramCache]: Analyzing trace with hash -953160270, now seen corresponding path program 1 times [2023-11-23 20:33:54,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:54,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57959194] [2023-11-23 20:33:54,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:54,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:54,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:55,665 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 20:33:55,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:55,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57959194] [2023-11-23 20:33:55,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57959194] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:33:55,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752671014] [2023-11-23 20:33:55,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:55,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:55,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bbe54fa-2a1f-4a54-9da1-814909b70d75/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:55,674 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bbe54fa-2a1f-4a54-9da1-814909b70d75/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:33:55,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bbe54fa-2a1f-4a54-9da1-814909b70d75/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:33:55,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:55,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-23 20:33:55,946 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:56,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2023-11-23 20:33:56,124 WARN L876 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$.base| |node_create_~temp~0#1.base|))))) is different from true [2023-11-23 20:33:56,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:33:56,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 12 [2023-11-23 20:33:56,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-23 20:33:56,198 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-11-23 20:33:56,198 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:33:56,257 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_172 (Array Int Int)) (|v_node_create_~temp~0#1.base_11| Int)) (or (< |c_#StackHeapBarrier| (+ |v_node_create_~temp~0#1.base_11| 1)) (not (= (select (select (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_11| v_ArrVal_172) |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|) 0)))) is different from false [2023-11-23 20:33:56,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752671014] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:33:56,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1218965952] [2023-11-23 20:33:56,285 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-11-23 20:33:56,285 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:33:56,290 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:33:56,298 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:33:56,298 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:33:58,886 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 6 for LOIs [2023-11-23 20:33:58,903 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:34:12,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1218965952] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:34:12,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 20:34:12,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [13, 13] total 31 [2023-11-23 20:34:12,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426321197] [2023-11-23 20:34:12,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:34:12,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-23 20:34:12,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:12,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-23 20:34:12,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=787, Unknown=5, NotChecked=114, Total=992 [2023-11-23 20:34:12,808 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 16 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 20:34:15,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 20:34:18,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 20:34:19,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:19,807 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2023-11-23 20:34:19,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-23 20:34:19,808 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 23 [2023-11-23 20:34:19,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:19,809 INFO L225 Difference]: With dead ends: 28 [2023-11-23 20:34:19,809 INFO L226 Difference]: Without dead ends: 26 [2023-11-23 20:34:19,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=86, Invalid=787, Unknown=5, NotChecked=114, Total=992 [2023-11-23 20:34:19,812 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:19,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 67 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 253 Invalid, 3 Unknown, 0 Unchecked, 7.0s Time] [2023-11-23 20:34:19,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-23 20:34:19,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-23 20:34:19,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 20:34:19,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2023-11-23 20:34:19,823 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 23 [2023-11-23 20:34:19,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:19,824 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2023-11-23 20:34:19,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 20:34:19,824 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2023-11-23 20:34:19,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-23 20:34:19,825 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:19,826 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:34:19,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bbe54fa-2a1f-4a54-9da1-814909b70d75/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 20:34:20,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bbe54fa-2a1f-4a54-9da1-814909b70d75/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:34:20,041 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:34:20,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:20,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1157107414, now seen corresponding path program 1 times [2023-11-23 20:34:20,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:20,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004198212] [2023-11-23 20:34:20,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:20,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:20,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:20,531 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 20:34:20,532 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:20,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004198212] [2023-11-23 20:34:20,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004198212] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:34:20,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165619506] [2023-11-23 20:34:20,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:20,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:34:20,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bbe54fa-2a1f-4a54-9da1-814909b70d75/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:34:20,534 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bbe54fa-2a1f-4a54-9da1-814909b70d75/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:34:20,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bbe54fa-2a1f-4a54-9da1-814909b70d75/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 20:34:20,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:20,701 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 79 conjunts are in the unsatisfiable core [2023-11-23 20:34:20,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:34:20,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-23 20:34:21,003 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-23 20:34:21,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-23 20:34:21,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 20:34:21,188 INFO L349 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2023-11-23 20:34:21,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 57 [2023-11-23 20:34:21,277 INFO L349 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2023-11-23 20:34:21,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 27 [2023-11-23 20:34:21,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 20:34:21,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:34:21,486 INFO L349 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-11-23 20:34:21,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 59 [2023-11-23 20:34:21,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:34:21,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 39 [2023-11-23 20:34:21,528 INFO L349 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2023-11-23 20:34:21,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 34 [2023-11-23 20:34:21,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:34:21,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:34:21,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 58 [2023-11-23 20:34:21,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:34:21,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:34:21,756 INFO L349 Elim1Store]: treesize reduction 54, result has 8.5 percent of original size [2023-11-23 20:34:21,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 95 treesize of output 82 [2023-11-23 20:34:21,778 INFO L349 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2023-11-23 20:34:21,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 52 [2023-11-23 20:34:21,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:34:21,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 40 [2023-11-23 20:34:21,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 36 [2023-11-23 20:34:22,038 INFO L349 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2023-11-23 20:34:22,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 40 [2023-11-23 20:34:22,098 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:34:22,098 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:34:22,578 WARN L854 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_sll_circular_append_~head#1.offset| Int) (v_ArrVal_305 (Array Int Int)) (v_ArrVal_308 (Array Int Int)) (v_ArrVal_307 Int) (|v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_18| Int) (v_ArrVal_313 (Array Int Int))) (or (not (= (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_18| v_ArrVal_313) |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |ULTIMATE.start_sll_circular_append_~head#1.offset|) 0)) (not (let ((.cse1 (let ((.cse3 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_18| v_ArrVal_308))) (store .cse3 |c_ULTIMATE.start_sll_circular_append_~head#1.base| (store (select .cse3 |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |ULTIMATE.start_sll_circular_append_~head#1.offset| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_18|))))) (let ((.cse0 (select (select .cse1 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (= .cse0 (select (select .cse1 .cse0) (select (select (let ((.cse2 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_18| v_ArrVal_305))) (store .cse2 |c_ULTIMATE.start_sll_circular_append_~head#1.base| (store (select .cse2 |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |ULTIMATE.start_sll_circular_append_~head#1.offset| v_ArrVal_307))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))))) (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_18| 1)) (not (= 0 (select |c_#valid| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_18|))))) is different from false [2023-11-23 20:34:22,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165619506] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:34:22,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1367875183] [2023-11-23 20:34:22,586 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-11-23 20:34:22,586 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:34:22,586 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:34:22,587 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:34:22,587 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:34:24,242 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 6 for LOIs [2023-11-23 20:34:24,254 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:34:49,197 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '461#(and (exists ((|v_#memory_$Pointer$.offset_73| (Array Int (Array Int Int))) (|v_#memory_int_86| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_circular_append_#in~head#1.base_10| Int) (|v_ULTIMATE.start_sll_circular_append_~head#1.base_16| Int) (|v_#memory_int_15| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_78| (Array Int (Array Int Int)))) (and (= |#memory_int| (store |v_#memory_int_15| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16| (store (select |v_#memory_int_15| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0 (select (select |#memory_int| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0)))) (= |v_#memory_int_15| (store |v_#memory_int_86| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0) (store (select |v_#memory_int_86| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0)) 0 (select (select |v_#memory_int_15| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0)) 0)))) (= (select (select |v_#memory_$Pointer$.base_78| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0) 0) (= |#memory_$Pointer$.base| (store (store |v_#memory_$Pointer$.base_78| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0) (store (select |v_#memory_$Pointer$.base_78| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0)) 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0))) |v_ULTIMATE.start_sll_circular_append_~head#1.base_16| (store (select (store |v_#memory_$Pointer$.base_78| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0) (store (select |v_#memory_$Pointer$.base_78| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0)) 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0))) |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0)))) (= |#memory_$Pointer$.offset| (store (store |v_#memory_$Pointer$.offset_73| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0) (store (select |v_#memory_$Pointer$.offset_73| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0)) 0 0)) |v_ULTIMATE.start_sll_circular_append_~head#1.base_16| (store (select (store |v_#memory_$Pointer$.offset_73| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0) (store (select |v_#memory_$Pointer$.offset_73| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0)) 0 0)) |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0 0))) (or (and (exists ((|v_#memory_int_39| (Array Int (Array Int Int))) (|v_#memory_int_82| (Array Int (Array Int Int)))) (and (= |v_#memory_int_39| (store |v_#memory_int_82| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0) (store (select |v_#memory_int_82| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0)) 0 (select (select |v_#memory_int_39| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0)) 0)))) (= |v_#memory_int_86| (store |v_#memory_int_39| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0) (store (select |v_#memory_int_39| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0)) 4 1))))) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0) 0)) (exists ((|v_#memory_$Pointer$.offset_69| (Array Int (Array Int Int)))) (= |v_#memory_$Pointer$.offset_73| (store |v_#memory_$Pointer$.offset_69| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0) (store (store (select |v_#memory_$Pointer$.offset_69| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0)) 0 0) 4 (select (select |v_#memory_$Pointer$.offset_73| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0)) 4))))) (exists ((|v_#valid_44| (Array Int Int))) (and (= (store |v_#valid_44| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0) 1) |#valid|) (= (select |v_#valid_44| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0)) 0))) (= |v_ULTIMATE.start_sll_circular_append_#in~head#1.base_10| |ULTIMATE.start_main_~#s~0#1.base|) (<= (+ (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0) 1) |#StackHeapBarrier|) (= |v_ULTIMATE.start_sll_circular_append_~head#1.base_16| |v_ULTIMATE.start_sll_circular_append_#in~head#1.base_10|) (exists ((|v_#length_28| (Array Int Int))) (= |#length| (store |v_#length_28| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0) 8))) (exists ((|v_old(#memory_int)_AFTER_CALL_26| (Array Int (Array Int Int))) (|v_#memory_int_85| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_72| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_77| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_17| Int)) (and (= (select (select (store |v_#memory_$Pointer$.base_77| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_17| (store (select |v_#memory_$Pointer$.base_77| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_17|) 0 |ULTIMATE.start_sll_circular_create_#res#1.base|)) |ULTIMATE.start_main_~#s~0#1.base|) 0) |ULTIMATE.start_sll_circular_create_#res#1.base|) (= |v_old(#memory_int)_AFTER_CALL_26| (store |v_#memory_int_85| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_17| (store (select |v_#memory_int_85| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_17|) 0 (select (select |v_old(#memory_int)_AFTER_CALL_26| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_17|) 0)))) (= (select (select (store |v_#memory_$Pointer$.offset_72| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_17| (store (select |v_#memory_$Pointer$.offset_72| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_17|) 0 0)) |ULTIMATE.start_main_~#s~0#1.base|) 0) 0))) (exists ((|v_#memory_$Pointer$.base_74| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_74| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0) (store (store (select |v_#memory_$Pointer$.base_74| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0)) 0 0) 4 (select (select |v_#memory_$Pointer$.base_78| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0)) 4))) |v_#memory_$Pointer$.base_78|))) (and (exists ((|v_#memory_int_39| (Array Int (Array Int Int))) (|v_#memory_int_82| (Array Int (Array Int Int)))) (and (= |v_#memory_int_39| (store |v_#memory_int_82| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0) (store (select |v_#memory_int_82| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0)) 0 (select (select |v_#memory_int_39| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0)) 0)))) (= |v_#memory_int_86| (store |v_#memory_int_39| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0) (store (select |v_#memory_int_39| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0)) 4 1))))) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0) 0)) (exists ((|v_#memory_$Pointer$.offset_69| (Array Int (Array Int Int)))) (= |v_#memory_$Pointer$.offset_73| (store |v_#memory_$Pointer$.offset_69| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0) (store (store (select |v_#memory_$Pointer$.offset_69| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0)) 0 0) 4 (select (select |v_#memory_$Pointer$.offset_73| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0)) 4))))) (exists ((|v_#memory_$Pointer$.offset_72| (Array Int (Array Int Int))) (|v_#memory_int_85| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_77| (Array Int (Array Int Int))) (|v_#memory_int_BEFORE_CALL_42| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_17| Int)) (and (= (select (select (store |v_#memory_$Pointer$.base_77| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_17| (store (select |v_#memory_$Pointer$.base_77| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_17|) 0 |ULTIMATE.start_sll_circular_create_#res#1.base|)) |ULTIMATE.start_main_~#s~0#1.base|) 0) |ULTIMATE.start_sll_circular_create_#res#1.base|) (= (select (select (store |v_#memory_$Pointer$.offset_72| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_17| (store (select |v_#memory_$Pointer$.offset_72| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_17|) 0 0)) |ULTIMATE.start_main_~#s~0#1.base|) 0) 0) (= (store |v_#memory_int_85| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_17| (store (select |v_#memory_int_85| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_17|) 0 (select (select |v_#memory_int_BEFORE_CALL_42| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_17|) 0))) |v_#memory_int_BEFORE_CALL_42|))) (exists ((|v_#valid_44| (Array Int Int))) (and (= (store |v_#valid_44| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0) 1) |#valid|) (= (select |v_#valid_44| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0)) 0))) (= |v_ULTIMATE.start_sll_circular_append_#in~head#1.base_10| |ULTIMATE.start_main_~#s~0#1.base|) (<= (+ (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0) 1) |#StackHeapBarrier|) (= |v_ULTIMATE.start_sll_circular_append_~head#1.base_16| |v_ULTIMATE.start_sll_circular_append_#in~head#1.base_10|) (exists ((|v_#length_28| (Array Int Int))) (= |#length| (store |v_#length_28| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0) 8))) (exists ((|v_#memory_$Pointer$.base_74| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_74| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0) (store (store (select |v_#memory_$Pointer$.base_74| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0)) 0 0) 4 (select (select |v_#memory_$Pointer$.base_78| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0)) 4))) |v_#memory_$Pointer$.base_78|)))) (= (select (select |v_#memory_$Pointer$.offset_73| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0) 0))) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~count~0#1| 1) (= |ULTIMATE.start_sll_circular_create_#res#1.offset| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) 0) |ULTIMATE.start_main_~ptr~0#1.offset|) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) 0) |ULTIMATE.start_main_~ptr~0#1.base|) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|))' at error location [2023-11-23 20:34:49,197 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 20:34:49,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 20:34:49,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 31 [2023-11-23 20:34:49,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243573086] [2023-11-23 20:34:49,198 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 20:34:49,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-23 20:34:49,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:49,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-23 20:34:49,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=2495, Unknown=7, NotChecked=100, Total=2756 [2023-11-23 20:34:49,201 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 31 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 4 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6)