./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/sll2n_append_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c13852a-90f9-46b4-864a-6c6d69a268b5/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c13852a-90f9-46b4-864a-6c6d69a268b5/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c13852a-90f9-46b4-864a-6c6d69a268b5/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c13852a-90f9-46b4-864a-6c6d69a268b5/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/sll2n_append_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c13852a-90f9-46b4-864a-6c6d69a268b5/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c13852a-90f9-46b4-864a-6c6d69a268b5/bin/utaipan-verify-DbMuA5NWw2 --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 742ffe63db70127807dbc7584eb0c51633a9ed1be5f19fa1a247e43392d52dab --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:35:23,777 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:35:23,866 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c13852a-90f9-46b4-864a-6c6d69a268b5/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 12:35:23,872 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:35:23,872 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:35:23,907 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:35:23,908 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:35:23,908 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:35:23,909 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:35:23,909 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:35:23,909 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:35:23,910 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:35:23,911 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:35:23,912 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:35:23,912 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:35:23,913 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:35:23,913 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:35:23,913 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:35:23,914 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:35:23,914 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:35:23,914 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:35:23,915 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:35:23,916 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:35:23,916 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:35:23,916 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:35:23,917 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:35:23,917 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:35:23,923 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:35:23,923 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:35:23,923 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:35:23,924 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:35:23,924 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:35:23,924 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:35:23,924 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:35:23,925 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:35:23,925 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:35:23,925 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:35:23,926 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:35:23,926 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:35:23,926 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:35:23,927 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:35:23,927 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 12:35:23,927 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:35:23,928 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:35:23,928 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:35:23,928 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:35:23,929 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:35:23,929 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_7c13852a-90f9-46b4-864a-6c6d69a268b5/bin/utaipan-verify-DbMuA5NWw2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c13852a-90f9-46b4-864a-6c6d69a268b5/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 742ffe63db70127807dbc7584eb0c51633a9ed1be5f19fa1a247e43392d52dab [2024-11-02 12:35:24,206 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:35:24,235 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:35:24,238 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:35:24,241 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:35:24,241 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:35:24,243 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c13852a-90f9-46b4-864a-6c6d69a268b5/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/list-simple/sll2n_append_unequal.i Unable to find full path for "g++" [2024-11-02 12:35:26,510 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:35:26,831 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:35:26,832 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c13852a-90f9-46b4-864a-6c6d69a268b5/sv-benchmarks/c/list-simple/sll2n_append_unequal.i [2024-11-02 12:35:26,845 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c13852a-90f9-46b4-864a-6c6d69a268b5/bin/utaipan-verify-DbMuA5NWw2/data/5f0d26de0/c6dbfb67365e4f6685a05ab934190041/FLAGd4057c4a4 [2024-11-02 12:35:26,868 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c13852a-90f9-46b4-864a-6c6d69a268b5/bin/utaipan-verify-DbMuA5NWw2/data/5f0d26de0/c6dbfb67365e4f6685a05ab934190041 [2024-11-02 12:35:26,871 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:35:26,873 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:35:26,874 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:35:26,875 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:35:26,881 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:35:26,881 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:35:26" (1/1) ... [2024-11-02 12:35:26,883 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@729192a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:35:26, skipping insertion in model container [2024-11-02 12:35:26,883 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:35:26" (1/1) ... [2024-11-02 12:35:26,938 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:35:27,338 WARN L251 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_7c13852a-90f9-46b4-864a-6c6d69a268b5/sv-benchmarks/c/list-simple/sll2n_append_unequal.i[24323,24336] [2024-11-02 12:35:27,347 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:35:27,359 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:35:27,413 WARN L251 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_7c13852a-90f9-46b4-864a-6c6d69a268b5/sv-benchmarks/c/list-simple/sll2n_append_unequal.i[24323,24336] [2024-11-02 12:35:27,414 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:35:27,445 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:35:27,445 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:35:27 WrapperNode [2024-11-02 12:35:27,446 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:35:27,447 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:35:27,447 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:35:27,447 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:35:27,455 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:35:27" (1/1) ... [2024-11-02 12:35:27,474 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:35:27" (1/1) ... [2024-11-02 12:35:27,506 INFO L138 Inliner]: procedures = 127, calls = 36, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 137 [2024-11-02 12:35:27,507 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:35:27,508 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:35:27,508 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:35:27,508 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:35:27,521 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:35:27" (1/1) ... [2024-11-02 12:35:27,521 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:35:27" (1/1) ... [2024-11-02 12:35:27,529 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:35:27" (1/1) ... [2024-11-02 12:35:27,530 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:35:27" (1/1) ... [2024-11-02 12:35:27,536 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:35:27" (1/1) ... [2024-11-02 12:35:27,540 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:35:27" (1/1) ... [2024-11-02 12:35:27,542 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:35:27" (1/1) ... [2024-11-02 12:35:27,543 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:35:27" (1/1) ... [2024-11-02 12:35:27,546 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:35:27,547 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:35:27,547 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:35:27,548 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:35:27,548 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:35:27" (1/1) ... [2024-11-02 12:35:27,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:35:27,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c13852a-90f9-46b4-864a-6c6d69a268b5/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:35:27,588 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c13852a-90f9-46b4-864a-6c6d69a268b5/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:35:27,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c13852a-90f9-46b4-864a-6c6d69a268b5/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:35:27,617 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-02 12:35:27,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-02 12:35:27,617 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2024-11-02 12:35:27,617 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2024-11-02 12:35:27,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-02 12:35:27,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:35:27,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-02 12:35:27,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-02 12:35:27,618 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-02 12:35:27,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-02 12:35:27,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2024-11-02 12:35:27,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:35:27,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:35:27,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:35:27,755 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:35:27,758 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:35:28,007 INFO L? ?]: Removed 45 outVars from TransFormulas that were not future-live. [2024-11-02 12:35:28,007 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:35:28,101 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:35:28,101 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-02 12:35:28,105 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:35:28 BoogieIcfgContainer [2024-11-02 12:35:28,105 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:35:28,108 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:35:28,108 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:35:28,116 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:35:28,116 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:35:26" (1/3) ... [2024-11-02 12:35:28,117 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@705b6b95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:35:28, skipping insertion in model container [2024-11-02 12:35:28,121 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:35:27" (2/3) ... [2024-11-02 12:35:28,121 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@705b6b95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:35:28, skipping insertion in model container [2024-11-02 12:35:28,122 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:35:28" (3/3) ... [2024-11-02 12:35:28,123 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2n_append_unequal.i [2024-11-02 12:35:28,170 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:35:28,170 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 12:35:28,234 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:35:28,241 INFO L333 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, 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;@55ffb60e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:35:28,241 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 12:35:28,249 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 23 states have internal predecessors, (35), 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) [2024-11-02 12:35:28,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-02 12:35:28,258 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:35:28,259 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:35:28,260 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:35:28,266 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:35:28,267 INFO L85 PathProgramCache]: Analyzing trace with hash 740986343, now seen corresponding path program 1 times [2024-11-02 12:35:28,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:35:28,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908745735] [2024-11-02 12:35:28,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:35:28,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:35:28,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:35:28,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:35:28,735 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:35:28,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908745735] [2024-11-02 12:35:28,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908745735] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:35:28,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:35:28,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:35:28,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030415349] [2024-11-02 12:35:28,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:35:28,746 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:35:28,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:35:28,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:35:28,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:35:28,795 INFO L87 Difference]: Start difference. First operand has 27 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 23 states have internal predecessors, (35), 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) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-02 12:35:28,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:35:28,867 INFO L93 Difference]: Finished difference Result 53 states and 77 transitions. [2024-11-02 12:35:28,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:35:28,871 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2024-11-02 12:35:28,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:35:28,880 INFO L225 Difference]: With dead ends: 53 [2024-11-02 12:35:28,880 INFO L226 Difference]: Without dead ends: 26 [2024-11-02 12:35:28,884 INFO L431 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 [2024-11-02 12:35:28,891 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 1 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:35:28,893 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 58 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:35:28,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-02 12:35:28,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2024-11-02 12:35:28,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 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) [2024-11-02 12:35:28,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2024-11-02 12:35:28,956 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 12 [2024-11-02 12:35:28,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:35:28,957 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2024-11-02 12:35:28,958 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-02 12:35:28,958 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2024-11-02 12:35:28,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-02 12:35:28,961 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:35:28,961 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:35:28,961 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:35:28,962 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:35:28,963 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:35:28,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1126465235, now seen corresponding path program 1 times [2024-11-02 12:35:28,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:35:28,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965861723] [2024-11-02 12:35:28,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:35:28,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:35:29,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:35:29,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-02 12:35:29,233 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:35:29,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965861723] [2024-11-02 12:35:29,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965861723] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:35:29,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044182945] [2024-11-02 12:35:29,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:35:29,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:35:29,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c13852a-90f9-46b4-864a-6c6d69a268b5/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:35:29,238 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c13852a-90f9-46b4-864a-6c6d69a268b5/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:35:29,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c13852a-90f9-46b4-864a-6c6d69a268b5/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:35:29,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:35:29,386 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-02 12:35:29,392 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:35:29,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:35:29,460 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:35:29,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-02 12:35:29,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044182945] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:35:29,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1495651246] [2024-11-02 12:35:29,545 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-02 12:35:29,545 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:35:29,551 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:35:29,557 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:35:29,558 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:35:31,648 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 114 for LOIs [2024-11-02 12:35:31,891 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:35:41,455 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '243#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~uneq~0#1| 5) (= (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) (= (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|) (exists ((|v_#memory_$Pointer$.base_54| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_54| (Array Int (Array Int Int))) (|v_#memory_int_56| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_append_~head#1.base_13| Int)) (and (= (store |v_#memory_$Pointer$.base_54| |v_ULTIMATE.start_sll_append_~head#1.base_13| (store (select |v_#memory_$Pointer$.base_54| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0))) |#memory_$Pointer$.base|) (or (and (exists ((|v_#memory_$Pointer$.offset_BEFORE_CALL_17| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.offset_BEFORE_CALL_17| |ULTIMATE.start_main_~#s~0#1.base|) 0) 0)) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0) 0)) (exists ((|v_#length_23| (Array Int Int))) (= (store |v_#length_23| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0) 8) |#length|)) (exists ((|v_#memory_$Pointer$.offset_50| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.offset_50| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0) (store (store (select |v_#memory_$Pointer$.offset_50| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0)) 4 0) 0 (select (select |v_#memory_$Pointer$.offset_54| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0)) 0))) |v_#memory_$Pointer$.offset_54|)) (exists ((|v_#memory_int_52| (Array Int (Array Int Int))) (|v_#memory_int_33| (Array Int (Array Int Int)))) (and (= |v_#memory_int_56| (store |v_#memory_int_33| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0) (store (select |v_#memory_int_33| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0)) 0 5))) (= (store |v_#memory_int_52| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0) (store (select |v_#memory_int_52| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0)) 4 (select (select |v_#memory_int_33| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0)) 4))) |v_#memory_int_33|))) (<= (+ (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0) 1) |#StackHeapBarrier|) (= |v_ULTIMATE.start_sll_append_~head#1.base_13| |ULTIMATE.start_main_~#s~0#1.base|) (exists ((|v_#memory_$Pointer$.base_50| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_50| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0) (store (store (select |v_#memory_$Pointer$.base_50| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0)) 4 0) 0 (select (select |v_#memory_$Pointer$.base_54| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0)) 0))) |v_#memory_$Pointer$.base_54|)) (exists ((|v_#valid_33| (Array Int Int))) (and (= (select |v_#valid_33| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0)) 0) (= (store |v_#valid_33| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0) 1) |#valid|)))) (and (exists ((|v_old(#memory_$Pointer$.offset)_AFTER_CALL_9| (Array Int (Array Int Int)))) (= (select (select |v_old(#memory_$Pointer$.offset)_AFTER_CALL_9| |ULTIMATE.start_main_~#s~0#1.base|) 0) 0)) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0) 0)) (exists ((|v_#length_23| (Array Int Int))) (= (store |v_#length_23| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0) 8) |#length|)) (exists ((|v_#memory_$Pointer$.offset_50| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.offset_50| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0) (store (store (select |v_#memory_$Pointer$.offset_50| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0)) 4 0) 0 (select (select |v_#memory_$Pointer$.offset_54| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0)) 0))) |v_#memory_$Pointer$.offset_54|)) (exists ((|v_#memory_int_52| (Array Int (Array Int Int))) (|v_#memory_int_33| (Array Int (Array Int Int)))) (and (= |v_#memory_int_56| (store |v_#memory_int_33| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0) (store (select |v_#memory_int_33| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0)) 0 5))) (= (store |v_#memory_int_52| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0) (store (select |v_#memory_int_52| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0)) 4 (select (select |v_#memory_int_33| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0)) 4))) |v_#memory_int_33|))) (<= (+ (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0) 1) |#StackHeapBarrier|) (= |v_ULTIMATE.start_sll_append_~head#1.base_13| |ULTIMATE.start_main_~#s~0#1.base|) (exists ((|v_#memory_$Pointer$.base_50| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_50| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0) (store (store (select |v_#memory_$Pointer$.base_50| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0)) 4 0) 0 (select (select |v_#memory_$Pointer$.base_54| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0)) 0))) |v_#memory_$Pointer$.base_54|)) (exists ((|v_#valid_33| (Array Int Int))) (and (= (select |v_#valid_33| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0)) 0) (= (store |v_#valid_33| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0) 1) |#valid|))))) (= (select (select |v_#memory_$Pointer$.base_54| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0) 0) (= |#memory_int| (store |v_#memory_int_56| |v_ULTIMATE.start_sll_append_~head#1.base_13| (store (select |v_#memory_int_56| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0 (select (select |#memory_int| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_54| |v_ULTIMATE.start_sll_append_~head#1.base_13| (store (select |v_#memory_$Pointer$.offset_54| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0 0))) (= (select (select |v_#memory_$Pointer$.offset_54| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0) 0))))' at error location [2024-11-02 12:35:41,455 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:35:41,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:35:41,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2024-11-02 12:35:41,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002998346] [2024-11-02 12:35:41,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:35:41,458 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 12:35:41,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:35:41,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 12:35:41,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=262, Unknown=3, NotChecked=0, Total=306 [2024-11-02 12:35:41,461 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-02 12:35:41,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:35:41,519 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2024-11-02 12:35:41,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:35:41,520 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 18 [2024-11-02 12:35:41,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:35:41,521 INFO L225 Difference]: With dead ends: 46 [2024-11-02 12:35:41,522 INFO L226 Difference]: Without dead ends: 27 [2024-11-02 12:35:41,522 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=41, Invalid=262, Unknown=3, NotChecked=0, Total=306 [2024-11-02 12:35:41,524 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 1 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:35:41,525 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 49 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:35:41,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-02 12:35:41,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-02 12:35:41,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 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) [2024-11-02 12:35:41,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2024-11-02 12:35:41,534 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 18 [2024-11-02 12:35:41,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:35:41,535 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2024-11-02 12:35:41,535 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-02 12:35:41,535 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2024-11-02 12:35:41,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-02 12:35:41,537 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:35:41,538 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:35:41,560 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c13852a-90f9-46b4-864a-6c6d69a268b5/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-02 12:35:41,738 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c13852a-90f9-46b4-864a-6c6d69a268b5/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:35:41,739 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:35:41,739 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:35:41,740 INFO L85 PathProgramCache]: Analyzing trace with hash 180250611, now seen corresponding path program 2 times [2024-11-02 12:35:41,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:35:41,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015398024] [2024-11-02 12:35:41,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:35:41,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:35:41,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:35:42,718 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-02 12:35:42,718 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:35:42,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015398024] [2024-11-02 12:35:42,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015398024] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:35:42,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756087457] [2024-11-02 12:35:42,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-02 12:35:42,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:35:42,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c13852a-90f9-46b4-864a-6c6d69a268b5/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:35:42,722 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c13852a-90f9-46b4-864a-6c6d69a268b5/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:35:42,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c13852a-90f9-46b4-864a-6c6d69a268b5/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 12:35:42,873 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-02 12:35:42,873 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:35:42,875 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-02 12:35:42,881 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:35:43,172 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 [2024-11-02 12:35:43,246 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_node_create_~temp~0#1.base_22| Int)) (and (<= (+ |v_node_create_~temp~0#1.base_22| 1) |c_#StackHeapBarrier|) (= (store |c_old(#memory_$Pointer$.base)| |v_node_create_~temp~0#1.base_22| (select |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_22|)) |c_#memory_$Pointer$.base|))) is different from true [2024-11-02 12:35:43,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 12:35:43,273 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 [2024-11-02 12:35:43,294 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 [2024-11-02 12:35:43,304 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2024-11-02 12:35:43,304 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:35:43,456 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_node_create_~temp~0#1.base_27| Int) (v_ArrVal_212 (Array Int Int))) (or (< |c_#StackHeapBarrier| (+ |v_node_create_~temp~0#1.base_27| 1)) (not (= (select (select (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_27| v_ArrVal_212) |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|) 0)))) is different from false [2024-11-02 12:35:43,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756087457] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:35:43,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [672478359] [2024-11-02 12:35:43,467 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-02 12:35:43,467 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:35:43,467 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:35:43,468 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:35:43,468 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:35:44,806 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 131 for LOIs [2024-11-02 12:35:44,997 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:36:02,027 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '460#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_#memory_int_73| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_append_~head#1.base_15| Int) (|v_#memory_$Pointer$.offset_65| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_68| (Array Int (Array Int Int)))) (and (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_65| |v_ULTIMATE.start_sll_append_~head#1.base_15| (store (select |v_#memory_$Pointer$.offset_65| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0 0))) (= (select (select |v_#memory_$Pointer$.offset_65| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0) 0) (or (and (exists ((|v_#memory_int_33| (Array Int (Array Int Int))) (|v_#memory_int_69| (Array Int (Array Int Int)))) (and (= |v_#memory_int_33| (store |v_#memory_int_69| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0) (store (select |v_#memory_int_69| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0)) 4 (select (select |v_#memory_int_33| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0)) 4)))) (= (store |v_#memory_int_33| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0) (store (select |v_#memory_int_33| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0)) 0 5)) |v_#memory_int_73|))) (exists ((|v_#memory_$Pointer$.offset_61| (Array Int (Array Int Int)))) (= |v_#memory_$Pointer$.offset_65| (store |v_#memory_$Pointer$.offset_61| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0) (store (store (select |v_#memory_$Pointer$.offset_61| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0)) 4 0) 0 (select (select |v_#memory_$Pointer$.offset_65| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0)) 0))))) (exists ((|v_#memory_$Pointer$.base_64| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_64| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0) (store (store (select |v_#memory_$Pointer$.base_64| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0)) 4 0) 0 (select (select |v_#memory_$Pointer$.base_68| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0)) 0))) |v_#memory_$Pointer$.base_68|)) (not (= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0))) (exists ((|v_#length_30| (Array Int Int))) (= (store |v_#length_30| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0) 8) |#length|)) (exists ((|v_#valid_40| (Array Int Int))) (and (= (store |v_#valid_40| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0) 1) |#valid|) (= (select |v_#valid_40| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0)) 0))) (= |v_ULTIMATE.start_sll_append_~head#1.base_15| |ULTIMATE.start_main_~#s~0#1.base|) (<= (+ 1 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0)) |#StackHeapBarrier|) (exists ((|v_#memory_$Pointer$.offset_64| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.base)_AFTER_CALL_20| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_67| (Array Int (Array Int Int))) (|v_old(#memory_int)_AFTER_CALL_20| (Array Int (Array Int Int))) (|v_#memory_int_72| (Array Int (Array Int Int)))) (and (= (select (select |v_#memory_$Pointer$.offset_64| |ULTIMATE.start_main_~#s~0#1.base|) 0) 0) (= |v_old(#memory_$Pointer$.base)_AFTER_CALL_20| (store |v_#memory_$Pointer$.base_67| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_20| |ULTIMATE.start_main_~#s~0#1.base|) 0) (store (select |v_#memory_$Pointer$.base_67| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_20| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4 (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_20| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_20| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4)))) (= |v_old(#memory_int)_AFTER_CALL_20| (store |v_#memory_int_72| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_20| |ULTIMATE.start_main_~#s~0#1.base|) 0) (store (select |v_#memory_int_72| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_20| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4 (select (select |v_old(#memory_int)_AFTER_CALL_20| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_20| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4))))))) (and (exists ((|v_#memory_int_33| (Array Int (Array Int Int))) (|v_#memory_int_69| (Array Int (Array Int Int)))) (and (= |v_#memory_int_33| (store |v_#memory_int_69| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0) (store (select |v_#memory_int_69| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0)) 4 (select (select |v_#memory_int_33| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0)) 4)))) (= (store |v_#memory_int_33| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0) (store (select |v_#memory_int_33| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0)) 0 5)) |v_#memory_int_73|))) (exists ((|v_#memory_$Pointer$.offset_61| (Array Int (Array Int Int)))) (= |v_#memory_$Pointer$.offset_65| (store |v_#memory_$Pointer$.offset_61| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0) (store (store (select |v_#memory_$Pointer$.offset_61| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0)) 4 0) 0 (select (select |v_#memory_$Pointer$.offset_65| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0)) 0))))) (exists ((|v_#memory_$Pointer$.base_64| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_64| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0) (store (store (select |v_#memory_$Pointer$.base_64| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0)) 4 0) 0 (select (select |v_#memory_$Pointer$.base_68| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0)) 0))) |v_#memory_$Pointer$.base_68|)) (not (= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0))) (exists ((|v_#memory_$Pointer$.offset_64| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.base)_AFTER_CALL_21| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_67| (Array Int (Array Int Int))) (|v_#memory_int_72| (Array Int (Array Int Int))) (|v_old(#memory_int)_AFTER_CALL_21| (Array Int (Array Int Int)))) (and (= |v_old(#memory_$Pointer$.base)_AFTER_CALL_21| (store |v_#memory_$Pointer$.base_67| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_21| |ULTIMATE.start_main_~#s~0#1.base|) 0) (store (select |v_#memory_$Pointer$.base_67| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_21| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4 (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_21| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_21| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4)))) (= (select (select |v_#memory_$Pointer$.offset_64| |ULTIMATE.start_main_~#s~0#1.base|) 0) 0) (= |v_old(#memory_int)_AFTER_CALL_21| (store |v_#memory_int_72| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_21| |ULTIMATE.start_main_~#s~0#1.base|) 0) (store (select |v_#memory_int_72| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_21| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4 (select (select |v_old(#memory_int)_AFTER_CALL_21| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_21| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4)))))) (exists ((|v_#length_30| (Array Int Int))) (= (store |v_#length_30| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0) 8) |#length|)) (exists ((|v_#valid_40| (Array Int Int))) (and (= (store |v_#valid_40| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0) 1) |#valid|) (= (select |v_#valid_40| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0)) 0))) (= |v_ULTIMATE.start_sll_append_~head#1.base_15| |ULTIMATE.start_main_~#s~0#1.base|) (<= (+ 1 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0)) |#StackHeapBarrier|))) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_68| |v_ULTIMATE.start_sll_append_~head#1.base_15| (store (select |v_#memory_$Pointer$.base_68| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0)))) (= (select (select |v_#memory_$Pointer$.base_68| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0) 0) (= (store |v_#memory_int_73| |v_ULTIMATE.start_sll_append_~head#1.base_15| (store (select |v_#memory_int_73| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0 (select (select |#memory_int| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0))) |#memory_int|))) (= |ULTIMATE.start_main_~uneq~0#1| 5) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) 0) |ULTIMATE.start_main_~ptr~0#1.offset|) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= (select (select |#memory_$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 [2024-11-02 12:36:02,028 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:36:02,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 12:36:02,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2024-11-02 12:36:02,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640649222] [2024-11-02 12:36:02,029 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 12:36:02,029 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-02 12:36:02,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:36:02,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-02 12:36:02,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=632, Unknown=3, NotChecked=102, Total=812 [2024-11-02 12:36:02,032 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand has 15 states, 10 states have (on average 1.9) internal successors, (19), 12 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4)