./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 e7bb482b 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_42e1684f-3c61-4c57-b52d-d2fbdbc5cb10/bin/utaipan-verify-FOvIYxoinp/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e1684f-3c61-4c57-b52d-d2fbdbc5cb10/bin/utaipan-verify-FOvIYxoinp/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e1684f-3c61-4c57-b52d-d2fbdbc5cb10/bin/utaipan-verify-FOvIYxoinp/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e1684f-3c61-4c57-b52d-d2fbdbc5cb10/bin/utaipan-verify-FOvIYxoinp/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/sll2c_append_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e1684f-3c61-4c57-b52d-d2fbdbc5cb10/bin/utaipan-verify-FOvIYxoinp/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e1684f-3c61-4c57-b52d-d2fbdbc5cb10/bin/utaipan-verify-FOvIYxoinp --witnessprinter.witness.filename witness.graphml --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-e7bb482 [2023-11-06 20:31:43,199 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 20:31:43,317 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e1684f-3c61-4c57-b52d-d2fbdbc5cb10/bin/utaipan-verify-FOvIYxoinp/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-06 20:31:43,324 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 20:31:43,324 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 20:31:43,350 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 20:31:43,351 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 20:31:43,352 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 20:31:43,353 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 20:31:43,358 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 20:31:43,359 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-06 20:31:43,359 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-06 20:31:43,360 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-06 20:31:43,361 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-06 20:31:43,362 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-06 20:31:43,362 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-06 20:31:43,363 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-06 20:31:43,363 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-06 20:31:43,364 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-06 20:31:43,364 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-06 20:31:43,365 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-06 20:31:43,365 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-06 20:31:43,367 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 20:31:43,367 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 20:31:43,368 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 20:31:43,368 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 20:31:43,369 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 20:31:43,369 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 20:31:43,370 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 20:31:43,370 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 20:31:43,371 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 20:31:43,372 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 20:31:43,372 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 20:31:43,372 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 20:31:43,373 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 20:31:43,373 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 20:31:43,373 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:31:43,374 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 20:31:43,374 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 20:31:43,374 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 20:31:43,375 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-06 20:31:43,375 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 20:31:43,376 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 20:31:43,376 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-06 20:31:43,377 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 20:31:43,377 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_42e1684f-3c61-4c57-b52d-d2fbdbc5cb10/bin/utaipan-verify-FOvIYxoinp/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e1684f-3c61-4c57-b52d-d2fbdbc5cb10/bin/utaipan-verify-FOvIYxoinp Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b335af75f55d322161e6a270bf4669ab290ae0e9da4bc480724c7d5e3b79fdab [2023-11-06 20:31:43,717 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 20:31:43,757 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 20:31:43,759 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 20:31:43,760 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 20:31:43,762 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 20:31:43,764 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e1684f-3c61-4c57-b52d-d2fbdbc5cb10/bin/utaipan-verify-FOvIYxoinp/../../sv-benchmarks/c/list-simple/sll2c_append_equal.i [2023-11-06 20:31:46,960 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 20:31:47,289 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 20:31:47,290 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e1684f-3c61-4c57-b52d-d2fbdbc5cb10/sv-benchmarks/c/list-simple/sll2c_append_equal.i [2023-11-06 20:31:47,306 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e1684f-3c61-4c57-b52d-d2fbdbc5cb10/bin/utaipan-verify-FOvIYxoinp/data/50aedaabf/671a241641fd4077a7493cfd0cbf091a/FLAGbaa4afc24 [2023-11-06 20:31:47,325 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e1684f-3c61-4c57-b52d-d2fbdbc5cb10/bin/utaipan-verify-FOvIYxoinp/data/50aedaabf/671a241641fd4077a7493cfd0cbf091a [2023-11-06 20:31:47,328 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 20:31:47,329 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 20:31:47,331 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 20:31:47,331 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 20:31:47,336 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 20:31:47,336 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:31:47" (1/1) ... [2023-11-06 20:31:47,337 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@692f38c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:47, skipping insertion in model container [2023-11-06 20:31:47,338 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:31:47" (1/1) ... [2023-11-06 20:31:47,392 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 20:31:47,755 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_42e1684f-3c61-4c57-b52d-d2fbdbc5cb10/sv-benchmarks/c/list-simple/sll2c_append_equal.i[24433,24446] [2023-11-06 20:31:47,763 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:31:47,777 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 20:31:47,824 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_42e1684f-3c61-4c57-b52d-d2fbdbc5cb10/sv-benchmarks/c/list-simple/sll2c_append_equal.i[24433,24446] [2023-11-06 20:31:47,825 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:31:47,862 INFO L206 MainTranslator]: Completed translation [2023-11-06 20:31:47,862 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:47 WrapperNode [2023-11-06 20:31:47,863 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 20:31:47,864 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 20:31:47,864 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 20:31:47,864 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 20:31:47,872 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:47" (1/1) ... [2023-11-06 20:31:47,919 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:47" (1/1) ... [2023-11-06 20:31:47,955 INFO L138 Inliner]: procedures = 127, calls = 42, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 139 [2023-11-06 20:31:47,956 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 20:31:47,956 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 20:31:47,957 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 20:31:47,957 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 20:31:47,977 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:47" (1/1) ... [2023-11-06 20:31:47,977 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:47" (1/1) ... [2023-11-06 20:31:47,982 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:47" (1/1) ... [2023-11-06 20:31:47,989 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:47" (1/1) ... [2023-11-06 20:31:47,998 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:47" (1/1) ... [2023-11-06 20:31:48,016 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:47" (1/1) ... [2023-11-06 20:31:48,018 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:47" (1/1) ... [2023-11-06 20:31:48,020 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:47" (1/1) ... [2023-11-06 20:31:48,024 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 20:31:48,029 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 20:31:48,030 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 20:31:48,030 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 20:31:48,031 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:47" (1/1) ... [2023-11-06 20:31:48,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:31:48,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e1684f-3c61-4c57-b52d-d2fbdbc5cb10/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:31:48,088 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e1684f-3c61-4c57-b52d-d2fbdbc5cb10/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 20:31:48,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e1684f-3c61-4c57-b52d-d2fbdbc5cb10/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 20:31:48,144 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 20:31:48,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 20:31:48,145 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-11-06 20:31:48,145 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-11-06 20:31:48,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 20:31:48,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 20:31:48,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 20:31:48,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-06 20:31:48,149 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-06 20:31:48,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 20:31:48,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-06 20:31:48,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 20:31:48,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 20:31:48,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 20:31:48,291 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 20:31:48,293 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 20:31:48,614 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 20:31:48,690 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 20:31:48,691 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-06 20:31:48,695 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:31:48 BoogieIcfgContainer [2023-11-06 20:31:48,695 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 20:31:48,698 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 20:31:48,698 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 20:31:48,701 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 20:31:48,702 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 08:31:47" (1/3) ... [2023-11-06 20:31:48,703 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16f65de4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:31:48, skipping insertion in model container [2023-11-06 20:31:48,703 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:47" (2/3) ... [2023-11-06 20:31:48,703 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16f65de4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:31:48, skipping insertion in model container [2023-11-06 20:31:48,704 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:31:48" (3/3) ... [2023-11-06 20:31:48,705 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2c_append_equal.i [2023-11-06 20:31:48,728 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 20:31:48,728 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 20:31:48,791 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 20:31:48,799 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=LoopsAndPotentialCycles, 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;@1d2564be, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 20:31:48,799 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 20:31:48,804 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) [2023-11-06 20:31:48,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-06 20:31:48,815 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:31:48,815 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:31:48,816 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:31:48,822 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:31:48,822 INFO L85 PathProgramCache]: Analyzing trace with hash -605451759, now seen corresponding path program 1 times [2023-11-06 20:31:48,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:31:48,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130961648] [2023-11-06 20:31:48,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:31:48,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:31:49,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:31:49,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 20:31:49,407 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:31:49,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130961648] [2023-11-06 20:31:49,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130961648] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:31:49,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:31:49,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 20:31:49,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653190540] [2023-11-06 20:31:49,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:31:49,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:31:49,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:31:49,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:31:49,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:31:49,468 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) [2023-11-06 20:31:49,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:31:49,538 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2023-11-06 20:31:49,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:31:49,541 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 [2023-11-06 20:31:49,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:31:49,548 INFO L225 Difference]: With dead ends: 53 [2023-11-06 20:31:49,548 INFO L226 Difference]: Without dead ends: 25 [2023-11-06 20:31:49,551 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 [2023-11-06 20:31:49,557 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 [2023-11-06 20:31:49,559 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] [2023-11-06 20:31:49,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-06 20:31:49,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2023-11-06 20:31:49,609 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) [2023-11-06 20:31:49,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2023-11-06 20:31:49,613 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 17 [2023-11-06 20:31:49,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:31:49,614 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2023-11-06 20:31:49,615 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) [2023-11-06 20:31:49,615 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2023-11-06 20:31:49,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-06 20:31:49,617 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:31:49,618 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:31:49,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 20:31:49,618 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:31:49,619 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:31:49,620 INFO L85 PathProgramCache]: Analyzing trace with hash -948913763, now seen corresponding path program 1 times [2023-11-06 20:31:49,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:31:49,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126675223] [2023-11-06 20:31:49,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:31:49,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:31:49,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:31:50,469 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 20:31:50,470 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:31:50,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126675223] [2023-11-06 20:31:50,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126675223] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:31:50,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214637529] [2023-11-06 20:31:50,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:31:50,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:31:50,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e1684f-3c61-4c57-b52d-d2fbdbc5cb10/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:31:50,477 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e1684f-3c61-4c57-b52d-d2fbdbc5cb10/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:31:50,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e1684f-3c61-4c57-b52d-d2fbdbc5cb10/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 20:31:50,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:31:50,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-06 20:31:50,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:31:51,021 INFO L351 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 [2023-11-06 20:31:51,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 20:31:51,106 INFO L351 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 [2023-11-06 20:31:51,159 INFO L351 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 [2023-11-06 20:31:51,184 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 20:31:51,185 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:31:51,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214637529] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:31:51,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1723342102] [2023-11-06 20:31:51,381 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-11-06 20:31:51,382 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:31:51,386 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 20:31:51,393 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 20:31:51,394 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 20:31:53,743 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 6 for LOIs [2023-11-06 20:31:53,758 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 20:31:55,262 WARN L861 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_sll_circular_create_#res#1.offset| 0) (= |c_ULTIMATE.start_sll_circular_append_#in~data#1| 1) (= 1 |c_ULTIMATE.start_sll_circular_append_~data#1|) (= |c_ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 1 |c_#StackHeapBarrier|) (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_append_~head#1.base|) 0) |c_ULTIMATE.start_sll_circular_append_#t~mem10#1.base|) (= |c_ULTIMATE.start_sll_circular_append_~head#1.offset| 0) (= |c_ULTIMATE.start_main_~data~0#1| 1) (= |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.offset| 0) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_append_~head#1.base|) 0) |c_ULTIMATE.start_sll_circular_append_#t~mem10#1.offset|) (<= 2 |c_ULTIMATE.start_sll_circular_append_~head#1.base|) (<= 2 |c_ULTIMATE.start_main_~#s~0#1.base|) (<= 2 |c_ULTIMATE.start_sll_circular_append_#in~head#1.base|) (= |c_ULTIMATE.start_sll_circular_append_#in~head#1.offset| 0) (let ((.cse0 (= |c_ULTIMATE.start_sll_circular_append_#in~head#1.base| |c_ULTIMATE.start_main_~#s~0#1.base|)) (.cse1 (= |c_ULTIMATE.start_sll_circular_append_#in~head#1.base| |c_ULTIMATE.start_sll_circular_append_~head#1.base|)) (.cse2 (exists ((|v_#memory_$Pointer$.base_57| (Array Int (Array Int Int)))) (= |c_#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_57| |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| (store (store (select |v_#memory_$Pointer$.base_57| |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base|) 0 0) 4 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base|) 4)))))) (.cse3 (exists ((|v_#memory_$Pointer$.offset_54| (Array Int (Array Int Int)))) (= |c_#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_54| |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| (store (store (select |v_#memory_$Pointer$.offset_54| |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base|) 0 0) 4 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base|) 4)))))) (.cse4 (exists ((|v_#memory_int_63| (Array Int (Array Int Int))) (|v_#memory_int_37| (Array Int (Array Int Int)))) (let ((.cse9 (select |v_#memory_int_37| |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base|))) (and (= (store |v_#memory_int_37| |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| (store .cse9 4 1)) |c_#memory_int|) (= (store |v_#memory_int_63| |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| (store (select |v_#memory_int_63| |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base|) 0 (select .cse9 0))) |v_#memory_int_37|))))) (.cse5 (exists ((|v_#length_21| (Array Int Int))) (= |c_#length| (store |v_#length_21| |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| 8)))) (.cse6 (exists ((|v_#valid_33| (Array Int Int))) (and (= (select |v_#valid_33| |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base|) 0) (= |c_#valid| (store |v_#valid_33| |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| 1))))) (.cse7 (not (= |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| 0))) (.cse8 (<= (+ |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| 1) |c_#StackHeapBarrier|))) (or (and .cse0 .cse1 .cse2 .cse3 (exists ((|v_#memory_$Pointer$.base_60| (Array Int (Array Int Int))) (|v_#memory_int_66| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_57| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15| Int) (|v_#memory_int_BEFORE_CALL_21| (Array Int (Array Int Int)))) (and (= (select (select (store |v_#memory_$Pointer$.offset_57| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15| (store (select |v_#memory_$Pointer$.offset_57| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15|) 0 0)) |c_ULTIMATE.start_main_~#s~0#1.base|) 0) 0) (= (store |v_#memory_int_66| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15| (store (select |v_#memory_int_66| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15|) 0 (select (select |v_#memory_int_BEFORE_CALL_21| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15|) 0))) |v_#memory_int_BEFORE_CALL_21|) (= |c_ULTIMATE.start_sll_circular_create_#res#1.base| (select (select (store |v_#memory_$Pointer$.base_60| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15| (store (select |v_#memory_$Pointer$.base_60| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15|) 0 |c_ULTIMATE.start_sll_circular_create_#res#1.base|)) |c_ULTIMATE.start_main_~#s~0#1.base|) 0)))) .cse4 .cse5 .cse6 .cse7 .cse8) (and .cse0 .cse1 .cse2 (exists ((|v_#memory_$Pointer$.base_60| (Array Int (Array Int Int))) (|v_#memory_int_66| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_57| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15| Int) (|v_old(#memory_int)_AFTER_CALL_12| (Array Int (Array Int Int)))) (and (= (select (select (store |v_#memory_$Pointer$.offset_57| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15| (store (select |v_#memory_$Pointer$.offset_57| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15|) 0 0)) |c_ULTIMATE.start_main_~#s~0#1.base|) 0) 0) (= |v_old(#memory_int)_AFTER_CALL_12| (store |v_#memory_int_66| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15| (store (select |v_#memory_int_66| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15|) 0 (select (select |v_old(#memory_int)_AFTER_CALL_12| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15|) 0)))) (= |c_ULTIMATE.start_sll_circular_create_#res#1.base| (select (select (store |v_#memory_$Pointer$.base_60| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15| (store (select |v_#memory_$Pointer$.base_60| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15|) 0 |c_ULTIMATE.start_sll_circular_create_#res#1.base|)) |c_ULTIMATE.start_main_~#s~0#1.base|) 0)))) .cse3 .cse4 .cse5 .cse6 .cse7 .cse8))) (= |c_ULTIMATE.start_main_~len~0#1| 2)) is different from true [2023-11-06 20:31:58,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1723342102] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:31:58,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 20:31:58,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [13, 13] total 34 [2023-11-06 20:31:58,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678261335] [2023-11-06 20:31:58,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:31:58,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 20:31:58,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:31:58,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 20:31:58,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1077, Unknown=10, NotChecked=66, Total=1260 [2023-11-06 20:31:58,723 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 16 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 20:32:01,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 20:32:03,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:32:03,310 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2023-11-06 20:32:03,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 20:32:03,311 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 [2023-11-06 20:32:03,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:32:03,312 INFO L225 Difference]: With dead ends: 28 [2023-11-06 20:32:03,313 INFO L226 Difference]: Without dead ends: 26 [2023-11-06 20:32:03,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=107, Invalid=1077, Unknown=10, NotChecked=66, Total=1260 [2023-11-06 20:32:03,316 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 1 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-11-06 20:32:03,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 63 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 207 Invalid, 6 Unknown, 58 Unchecked, 4.6s Time] [2023-11-06 20:32:03,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-06 20:32:03,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-06 20:32:03,326 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) [2023-11-06 20:32:03,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2023-11-06 20:32:03,327 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 23 [2023-11-06 20:32:03,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:32:03,328 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2023-11-06 20:32:03,328 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) [2023-11-06 20:32:03,329 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2023-11-06 20:32:03,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-06 20:32:03,330 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:32:03,330 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] [2023-11-06 20:32:03,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e1684f-3c61-4c57-b52d-d2fbdbc5cb10/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 20:32:03,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e1684f-3c61-4c57-b52d-d2fbdbc5cb10/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:32:03,538 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:32:03,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:32:03,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1371121901, now seen corresponding path program 1 times [2023-11-06 20:32:03,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:32:03,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754577489] [2023-11-06 20:32:03,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:32:03,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:32:03,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:32:04,119 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 20:32:04,119 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:32:04,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754577489] [2023-11-06 20:32:04,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754577489] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:32:04,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979443432] [2023-11-06 20:32:04,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:32:04,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:32:04,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e1684f-3c61-4c57-b52d-d2fbdbc5cb10/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:32:04,122 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e1684f-3c61-4c57-b52d-d2fbdbc5cb10/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:32:04,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e1684f-3c61-4c57-b52d-d2fbdbc5cb10/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 20:32:04,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:32:04,343 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-06 20:32:04,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:32:04,522 INFO L351 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 [2023-11-06 20:32:04,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 20:32:04,575 INFO L351 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 [2023-11-06 20:32:04,625 INFO L351 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 [2023-11-06 20:32:04,647 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 20:32:04,647 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:32:04,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979443432] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:32:04,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [952462943] [2023-11-06 20:32:04,793 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-11-06 20:32:04,793 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:32:04,794 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 20:32:04,794 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 20:32:04,794 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 20:32:06,489 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 6 for LOIs [2023-11-06 20:32:06,500 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 20:32:17,440 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '459#(and (<= 1 |#StackHeapBarrier|) (= (select (select |#memory_int| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) 0)) (+ (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) 0) 4)) 1) (= |ULTIMATE.start_main_~count~0#1| 1) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) 0)) (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) 0)) |ULTIMATE.start_main_~ptr~0#1.offset|) (= |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_~ptr~0#1.base| (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) 0)) (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) 0))) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (exists ((|v_#memory_$Pointer$.base_75| (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_$Pointer$.offset_69| (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)))) (or (and (exists ((|v_#valid_40| (Array Int Int))) (and (= (select |v_#valid_40| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0)) 0) (= (store |v_#valid_40| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0) 1) |#valid|))) (exists ((|v_#memory_$Pointer$.base_71| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_71| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0) (store (store (select |v_#memory_$Pointer$.base_71| (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_75| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0)) 4))) |v_#memory_$Pointer$.base_75|)) (exists ((|v_#memory_$Pointer$.offset_65| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.offset_65| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0) (store (store (select |v_#memory_$Pointer$.offset_65| (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_69| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0)) 4))) |v_#memory_$Pointer$.offset_69|)) (exists ((|v_#memory_int_37| (Array Int (Array Int Int))) (|v_#memory_int_82| (Array Int (Array Int Int)))) (and (= |v_#memory_int_37| (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_37| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0)) 0)))) (= (store |v_#memory_int_37| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0) (store (select |v_#memory_int_37| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0)) 4 1)) |v_#memory_int_86|))) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0) 0)) (exists ((|v_old(#memory_int)_AFTER_CALL_26| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_74| (Array Int (Array Int Int))) (|v_#memory_int_85| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_68| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_16| Int)) (and (= |ULTIMATE.start_sll_circular_create_#res#1.base| (select (select (store |v_#memory_$Pointer$.base_74| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_16| (store (select |v_#memory_$Pointer$.base_74| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_16|) 0 |ULTIMATE.start_sll_circular_create_#res#1.base|)) |ULTIMATE.start_main_~#s~0#1.base|) 0)) (= |v_old(#memory_int)_AFTER_CALL_26| (store |v_#memory_int_85| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_16| (store (select |v_#memory_int_85| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_16|) 0 (select (select |v_old(#memory_int)_AFTER_CALL_26| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_16|) 0)))) (= (select (select (store |v_#memory_$Pointer$.offset_68| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_16| (store (select |v_#memory_$Pointer$.offset_68| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_16|) 0 0)) |ULTIMATE.start_main_~#s~0#1.base|) 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)))) (and (exists ((|v_#valid_40| (Array Int Int))) (and (= (select |v_#valid_40| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0)) 0) (= (store |v_#valid_40| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0) 1) |#valid|))) (exists ((|v_#memory_$Pointer$.base_71| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_71| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0) (store (store (select |v_#memory_$Pointer$.base_71| (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_75| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0)) 4))) |v_#memory_$Pointer$.base_75|)) (exists ((|v_#memory_$Pointer$.offset_65| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.offset_65| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0) (store (store (select |v_#memory_$Pointer$.offset_65| (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_69| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0)) 4))) |v_#memory_$Pointer$.offset_69|)) (exists ((|v_#memory_int_37| (Array Int (Array Int Int))) (|v_#memory_int_82| (Array Int (Array Int Int)))) (and (= |v_#memory_int_37| (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_37| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0)) 0)))) (= (store |v_#memory_int_37| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0) (store (select |v_#memory_int_37| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0)) 4 1)) |v_#memory_int_86|))) (not (= (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|) (exists ((|v_#memory_$Pointer$.base_74| (Array Int (Array Int Int))) (|v_#memory_int_85| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_68| (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_16| Int)) (and (= |ULTIMATE.start_sll_circular_create_#res#1.base| (select (select (store |v_#memory_$Pointer$.base_74| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_16| (store (select |v_#memory_$Pointer$.base_74| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_16|) 0 |ULTIMATE.start_sll_circular_create_#res#1.base|)) |ULTIMATE.start_main_~#s~0#1.base|) 0)) (= (store |v_#memory_int_85| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_16| (store (select |v_#memory_int_85| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_16|) 0 (select (select |v_#memory_int_BEFORE_CALL_42| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_16|) 0))) |v_#memory_int_BEFORE_CALL_42|) (= (select (select (store |v_#memory_$Pointer$.offset_68| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_16| (store (select |v_#memory_$Pointer$.offset_68| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_16|) 0 0)) |ULTIMATE.start_main_~#s~0#1.base|) 0) 0))) (<= (+ (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))))) (= |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)))) (= 0 (select (select |v_#memory_$Pointer$.base_75| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0)) (= (store (store |v_#memory_$Pointer$.base_75| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0) (store (select |v_#memory_$Pointer$.base_75| (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_75| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0) (store (select |v_#memory_$Pointer$.base_75| (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_$Pointer$.base|) (<= 2 |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) (= |#memory_$Pointer$.offset| (store (store |v_#memory_$Pointer$.offset_69| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0) (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)) |v_ULTIMATE.start_sll_circular_append_~head#1.base_16| (store (select (store |v_#memory_$Pointer$.offset_69| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0) (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)) |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0 0))) (<= 2 |v_ULTIMATE.start_sll_circular_append_#in~head#1.base_10|) (= (select (select |v_#memory_$Pointer$.offset_69| |v_ULTIMATE.start_sll_circular_append_~head#1.base_16|) 0) 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 [2023-11-06 20:32:17,441 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 20:32:17,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 20:32:17,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2023-11-06 20:32:17,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646278198] [2023-11-06 20:32:17,442 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 20:32:17,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 20:32:17,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:32:17,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 20:32:17,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1290, Unknown=5, NotChecked=0, Total=1406 [2023-11-06 20:32:17,445 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 20 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-06 20:32:18,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:32:18,056 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2023-11-06 20:32:18,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 20:32:18,057 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 25 [2023-11-06 20:32:18,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:32:18,058 INFO L225 Difference]: With dead ends: 34 [2023-11-06 20:32:18,058 INFO L226 Difference]: Without dead ends: 25 [2023-11-06 20:32:18,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=163, Invalid=1723, Unknown=6, NotChecked=0, Total=1892 [2023-11-06 20:32:18,061 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 33 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:32:18,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 158 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:32:18,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-06 20:32:18,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2023-11-06 20:32:18,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 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) [2023-11-06 20:32:18,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2023-11-06 20:32:18,069 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 25 [2023-11-06 20:32:18,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:32:18,070 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2023-11-06 20:32:18,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-06 20:32:18,071 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2023-11-06 20:32:18,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-06 20:32:18,072 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:32:18,072 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, 1] [2023-11-06 20:32:18,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e1684f-3c61-4c57-b52d-d2fbdbc5cb10/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-06 20:32:18,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e1684f-3c61-4c57-b52d-d2fbdbc5cb10/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-06 20:32:18,278 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:32:18,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:32:18,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1950307874, now seen corresponding path program 1 times [2023-11-06 20:32:18,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:32:18,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181028776] [2023-11-06 20:32:18,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:32:18,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:32:18,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat