./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 9bd2c7ff 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_bb66b30e-13fc-4c2d-afdb-eb0cc89a85cf/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb66b30e-13fc-4c2d-afdb-eb0cc89a85cf/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb66b30e-13fc-4c2d-afdb-eb0cc89a85cf/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb66b30e-13fc-4c2d-afdb-eb0cc89a85cf/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/sll2n_append_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb66b30e-13fc-4c2d-afdb-eb0cc89a85cf/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb66b30e-13fc-4c2d-afdb-eb0cc89a85cf/bin/utaipan-verify-t7M7D8N6sZ --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 0.2.3-dev-9bd2c7f [2023-11-19 04:53:40,545 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:53:40,617 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb66b30e-13fc-4c2d-afdb-eb0cc89a85cf/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 04:53:40,624 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:53:40,625 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:53:40,654 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:53:40,655 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:53:40,655 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:53:40,656 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:53:40,657 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:53:40,658 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:53:40,658 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:53:40,659 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:53:40,659 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:53:40,660 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:53:40,661 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:53:40,661 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:53:40,662 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:53:40,663 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:53:40,663 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:53:40,664 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:53:40,665 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:53:40,666 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:53:40,666 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:53:40,667 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:53:40,668 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:53:40,668 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:53:40,669 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:53:40,669 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:53:40,670 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:53:40,671 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:53:40,671 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:53:40,672 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:53:40,672 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:53:40,673 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:53:40,673 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:53:40,674 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:53:40,674 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:53:40,675 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:53:40,675 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:53:40,676 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:53:40,676 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:53:40,677 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:53:40,677 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:53:40,677 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:53:40,678 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_bb66b30e-13fc-4c2d-afdb-eb0cc89a85cf/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb66b30e-13fc-4c2d-afdb-eb0cc89a85cf/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 742ffe63db70127807dbc7584eb0c51633a9ed1be5f19fa1a247e43392d52dab [2023-11-19 04:53:40,962 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:53:40,984 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:53:40,987 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:53:40,988 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:53:40,989 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:53:40,990 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb66b30e-13fc-4c2d-afdb-eb0cc89a85cf/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/list-simple/sll2n_append_unequal.i [2023-11-19 04:53:44,205 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:53:44,556 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:53:44,557 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb66b30e-13fc-4c2d-afdb-eb0cc89a85cf/sv-benchmarks/c/list-simple/sll2n_append_unequal.i [2023-11-19 04:53:44,590 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb66b30e-13fc-4c2d-afdb-eb0cc89a85cf/bin/utaipan-verify-t7M7D8N6sZ/data/0b2df01fd/2d312f7c8d4241eca9708105761c9de4/FLAG48d235bd8 [2023-11-19 04:53:44,613 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb66b30e-13fc-4c2d-afdb-eb0cc89a85cf/bin/utaipan-verify-t7M7D8N6sZ/data/0b2df01fd/2d312f7c8d4241eca9708105761c9de4 [2023-11-19 04:53:44,617 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:53:44,618 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:53:44,620 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:53:44,620 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:53:44,627 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:53:44,628 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:53:44" (1/1) ... [2023-11-19 04:53:44,629 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35383590 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:44, skipping insertion in model container [2023-11-19 04:53:44,630 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:53:44" (1/1) ... [2023-11-19 04:53:44,693 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:53:45,013 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_bb66b30e-13fc-4c2d-afdb-eb0cc89a85cf/sv-benchmarks/c/list-simple/sll2n_append_unequal.i[24323,24336] [2023-11-19 04:53:45,021 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:53:45,037 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:53:45,126 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_bb66b30e-13fc-4c2d-afdb-eb0cc89a85cf/sv-benchmarks/c/list-simple/sll2n_append_unequal.i[24323,24336] [2023-11-19 04:53:45,137 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:53:45,180 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:53:45,180 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:45 WrapperNode [2023-11-19 04:53:45,181 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:53:45,182 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:53:45,183 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:53:45,183 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:53:45,194 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:45" (1/1) ... [2023-11-19 04:53:45,211 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:45" (1/1) ... [2023-11-19 04:53:45,241 INFO L138 Inliner]: procedures = 127, calls = 36, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 137 [2023-11-19 04:53:45,241 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:53:45,242 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:53:45,243 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:53:45,243 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:53:45,254 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:45" (1/1) ... [2023-11-19 04:53:45,254 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:45" (1/1) ... [2023-11-19 04:53:45,260 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:45" (1/1) ... [2023-11-19 04:53:45,260 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:45" (1/1) ... [2023-11-19 04:53:45,274 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:45" (1/1) ... [2023-11-19 04:53:45,279 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:45" (1/1) ... [2023-11-19 04:53:45,282 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:45" (1/1) ... [2023-11-19 04:53:45,284 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:45" (1/1) ... [2023-11-19 04:53:45,288 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:53:45,291 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:53:45,292 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:53:45,303 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:53:45,304 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:45" (1/1) ... [2023-11-19 04:53:45,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:53:45,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb66b30e-13fc-4c2d-afdb-eb0cc89a85cf/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:53:45,344 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb66b30e-13fc-4c2d-afdb-eb0cc89a85cf/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:53:45,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb66b30e-13fc-4c2d-afdb-eb0cc89a85cf/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:53:45,407 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 04:53:45,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 04:53:45,408 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-11-19 04:53:45,408 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-11-19 04:53:45,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 04:53:45,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:53:45,411 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 04:53:45,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 04:53:45,413 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 04:53:45,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 04:53:45,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-19 04:53:45,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:53:45,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:53:45,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:53:45,609 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:53:45,611 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:53:46,021 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:53:46,113 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:53:46,114 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-19 04:53:46,118 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:53:46 BoogieIcfgContainer [2023-11-19 04:53:46,118 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:53:46,122 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:53:46,122 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:53:46,126 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:53:46,126 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:53:44" (1/3) ... [2023-11-19 04:53:46,127 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@228a3c38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:53:46, skipping insertion in model container [2023-11-19 04:53:46,127 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:45" (2/3) ... [2023-11-19 04:53:46,128 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@228a3c38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:53:46, skipping insertion in model container [2023-11-19 04:53:46,128 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:53:46" (3/3) ... [2023-11-19 04:53:46,129 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2n_append_unequal.i [2023-11-19 04:53:46,153 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:53:46,153 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 04:53:46,205 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:53:46,213 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5d969c72, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:53:46,213 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 04:53:46,217 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) [2023-11-19 04:53:46,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-19 04:53:46,225 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:53:46,226 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:53:46,226 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:53:46,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:53:46,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1806204982, now seen corresponding path program 1 times [2023-11-19 04:53:46,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:53:46,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759583666] [2023-11-19 04:53:46,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:53:46,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:53:46,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:53:46,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:53:46,717 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:53:46,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759583666] [2023-11-19 04:53:46,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759583666] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:53:46,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:53:46,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:53:46,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851615150] [2023-11-19 04:53:46,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:53:46,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:53:46,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:53:46,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:53:46,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:53:46,758 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) [2023-11-19 04:53:46,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:53:46,805 INFO L93 Difference]: Finished difference Result 53 states and 77 transitions. [2023-11-19 04:53:46,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:53:46,808 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 [2023-11-19 04:53:46,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:53:46,815 INFO L225 Difference]: With dead ends: 53 [2023-11-19 04:53:46,816 INFO L226 Difference]: Without dead ends: 26 [2023-11-19 04:53:46,819 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 [2023-11-19 04:53:46,823 INFO L413 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 [2023-11-19 04:53:46,824 INFO L414 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] [2023-11-19 04:53:46,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-19 04:53:46,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2023-11-19 04:53:46,872 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) [2023-11-19 04:53:46,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2023-11-19 04:53:46,877 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 12 [2023-11-19 04:53:46,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:53:46,878 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2023-11-19 04:53:46,879 INFO L496 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) [2023-11-19 04:53:46,879 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2023-11-19 04:53:46,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-19 04:53:46,881 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:53:46,882 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:53:46,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:53:46,883 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:53:46,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:53:46,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1904638321, now seen corresponding path program 1 times [2023-11-19 04:53:46,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:53:46,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003562153] [2023-11-19 04:53:46,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:53:46,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:53:46,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:53:47,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 04:53:47,167 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:53:47,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003562153] [2023-11-19 04:53:47,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003562153] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:53:47,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804834574] [2023-11-19 04:53:47,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:53:47,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:53:47,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb66b30e-13fc-4c2d-afdb-eb0cc89a85cf/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:53:47,171 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb66b30e-13fc-4c2d-afdb-eb0cc89a85cf/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:53:47,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb66b30e-13fc-4c2d-afdb-eb0cc89a85cf/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:53:47,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:53:47,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 04:53:47,385 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:53:47,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:53:47,443 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:53:47,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 04:53:47,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804834574] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:53:47,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [869152306] [2023-11-19 04:53:47,496 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-19 04:53:47,496 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:53:47,500 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:53:47,505 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:53:47,506 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:53:50,471 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 139 for LOIs [2023-11-19 04:53:50,790 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:54:02,448 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '238#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~uneq~0#1| 5) (= |ULTIMATE.start_main_~count~0#1| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) 0) |ULTIMATE.start_main_~ptr~0#1.offset|) (= |ULTIMATE.start_sll_create_#res#1.offset| 0) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) 0) |ULTIMATE.start_main_~ptr~0#1.base|) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|) (exists ((|v_#memory_$Pointer$.base_54| (Array Int (Array Int Int))) (|v_#memory_int_55| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_54| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_append_#in~head#1.base_9| 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_$Pointer$.base_53| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.base)_AFTER_CALL_9| (Array Int (Array Int Int)))) (and (= (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_9| |ULTIMATE.start_main_~#s~0#1.base|) 0) |ULTIMATE.start_sll_create_#res#1.base|) (= |v_old(#memory_$Pointer$.base)_AFTER_CALL_9| (store |v_#memory_$Pointer$.base_53| |ULTIMATE.start_sll_create_#res#1.base| (store (select |v_#memory_$Pointer$.base_53| |ULTIMATE.start_sll_create_#res#1.base|) 4 (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_9| |ULTIMATE.start_sll_create_#res#1.base|) 4)))))) (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_$Pointer$.offset_53| (Array Int (Array Int Int)))) (= (select (select (store |v_#memory_$Pointer$.offset_53| |ULTIMATE.start_sll_create_#res#1.base| (store (select |v_#memory_$Pointer$.offset_53| |ULTIMATE.start_sll_create_#res#1.base|) 4 0)) |ULTIMATE.start_main_~#s~0#1.base|) 0) 0)) (<= (+ (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0) 1) |#StackHeapBarrier|) (= |v_ULTIMATE.start_sll_append_#in~head#1.base_9| |ULTIMATE.start_main_~#s~0#1.base|) (exists ((|v_#memory_int_54| (Array Int (Array Int Int))) (|v_old(#memory_int)_AFTER_CALL_9| (Array Int (Array Int Int)))) (= (store |v_#memory_int_54| |ULTIMATE.start_sll_create_#res#1.base| (store (select |v_#memory_int_54| |ULTIMATE.start_sll_create_#res#1.base|) 4 (select (select |v_old(#memory_int)_AFTER_CALL_9| |ULTIMATE.start_sll_create_#res#1.base|) 4))) |v_old(#memory_int)_AFTER_CALL_9|)) (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|))) (= |v_ULTIMATE.start_sll_append_#in~head#1.base_9| |v_ULTIMATE.start_sll_append_~head#1.base_13|) (exists ((|v_#memory_int_51| (Array Int (Array Int Int))) (|v_#memory_int_26| (Array Int (Array Int Int)))) (and (= (store |v_#memory_int_51| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0) (store (select |v_#memory_int_51| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0)) 4 (select (select |v_#memory_int_26| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0)) 4))) |v_#memory_int_26|) (= (store |v_#memory_int_26| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0) (store (select |v_#memory_int_26| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0)) 0 5)) |v_#memory_int_55|)))) (and (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_int_54| (Array Int (Array Int Int))) (|v_old(#memory_int)_AFTER_CALL_10| (Array Int (Array Int Int)))) (= |v_old(#memory_int)_AFTER_CALL_10| (store |v_#memory_int_54| |ULTIMATE.start_sll_create_#res#1.base| (store (select |v_#memory_int_54| |ULTIMATE.start_sll_create_#res#1.base|) 4 (select (select |v_old(#memory_int)_AFTER_CALL_10| |ULTIMATE.start_sll_create_#res#1.base|) 4))))) (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_$Pointer$.offset_53| (Array Int (Array Int Int)))) (= (select (select (store |v_#memory_$Pointer$.offset_53| |ULTIMATE.start_sll_create_#res#1.base| (store (select |v_#memory_$Pointer$.offset_53| |ULTIMATE.start_sll_create_#res#1.base|) 4 0)) |ULTIMATE.start_main_~#s~0#1.base|) 0) 0)) (<= (+ (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0) 1) |#StackHeapBarrier|) (exists ((|v_#memory_$Pointer$.base_53| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.base)_AFTER_CALL_10| (Array Int (Array Int Int)))) (and (= |v_old(#memory_$Pointer$.base)_AFTER_CALL_10| (store |v_#memory_$Pointer$.base_53| |ULTIMATE.start_sll_create_#res#1.base| (store (select |v_#memory_$Pointer$.base_53| |ULTIMATE.start_sll_create_#res#1.base|) 4 (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_10| |ULTIMATE.start_sll_create_#res#1.base|) 4)))) (= (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_10| |ULTIMATE.start_main_~#s~0#1.base|) 0) |ULTIMATE.start_sll_create_#res#1.base|))) (= |v_ULTIMATE.start_sll_append_#in~head#1.base_9| |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|))) (= |v_ULTIMATE.start_sll_append_#in~head#1.base_9| |v_ULTIMATE.start_sll_append_~head#1.base_13|) (exists ((|v_#memory_int_51| (Array Int (Array Int Int))) (|v_#memory_int_26| (Array Int (Array Int Int)))) (and (= (store |v_#memory_int_51| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0) (store (select |v_#memory_int_51| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0)) 4 (select (select |v_#memory_int_26| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0)) 4))) |v_#memory_int_26|) (= (store |v_#memory_int_26| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0) (store (select |v_#memory_int_26| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0)) 0 5)) |v_#memory_int_55|))))) (= (select (select |v_#memory_$Pointer$.base_54| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0) 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) (= |#memory_int| (store |v_#memory_int_55| |v_ULTIMATE.start_sll_append_~head#1.base_13| (store (select |v_#memory_int_55| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0 (select (select |#memory_int| |v_ULTIMATE.start_sll_append_~head#1.base_13|) 0)))))))' at error location [2023-11-19 04:54:02,448 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:54:02,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:54:02,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-11-19 04:54:02,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310590933] [2023-11-19 04:54:02,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:54:02,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:54:02,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:54:02,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:54:02,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=234, Unknown=2, NotChecked=0, Total=272 [2023-11-19 04:54:02,453 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) [2023-11-19 04:54:02,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:54:02,497 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2023-11-19 04:54:02,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:54:02,498 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 [2023-11-19 04:54:02,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:54:02,499 INFO L225 Difference]: With dead ends: 46 [2023-11-19 04:54:02,500 INFO L226 Difference]: Without dead ends: 27 [2023-11-19 04:54:02,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=36, Invalid=234, Unknown=2, NotChecked=0, Total=272 [2023-11-19 04:54:02,529 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:54:02,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 73 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:54:02,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-19 04:54:02,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-11-19 04:54:02,541 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) [2023-11-19 04:54:02,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2023-11-19 04:54:02,543 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 18 [2023-11-19 04:54:02,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:54:02,544 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2023-11-19 04:54:02,545 INFO L496 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) [2023-11-19 04:54:02,545 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2023-11-19 04:54:02,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-19 04:54:02,549 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:54:02,550 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:54:02,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb66b30e-13fc-4c2d-afdb-eb0cc89a85cf/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 04:54:02,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb66b30e-13fc-4c2d-afdb-eb0cc89a85cf/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:54:02,771 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:54:02,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:54:02,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1509467688, now seen corresponding path program 2 times [2023-11-19 04:54:02,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:54:02,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420532356] [2023-11-19 04:54:02,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:54:02,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:54:02,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:54:03,488 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 04:54:03,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:54:03,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420532356] [2023-11-19 04:54:03,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420532356] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:54:03,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909743682] [2023-11-19 04:54:03,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 04:54:03,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:54:03,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb66b30e-13fc-4c2d-afdb-eb0cc89a85cf/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:54:03,493 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb66b30e-13fc-4c2d-afdb-eb0cc89a85cf/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:54:03,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb66b30e-13fc-4c2d-afdb-eb0cc89a85cf/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 04:54:03,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 04:54:03,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:54:03,643 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-19 04:54:03,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:54:03,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2023-11-19 04:54:03,871 WARN L876 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$.base| |node_create_~temp~0#1.base|))))) is different from true [2023-11-19 04:54:03,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:54:03,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 12 [2023-11-19 04:54:03,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-19 04:54:03,951 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-11-19 04:54:03,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:54:04,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909743682] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:54:04,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [435371688] [2023-11-19 04:54:04,084 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-19 04:54:04,084 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:54:04,085 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:54:04,085 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:54:04,086 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:54:05,912 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 139 for LOIs [2023-11-19 04:54:06,186 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:54:18,871 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '457#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~uneq~0#1| 5) (= |ULTIMATE.start_main_~count~0#1| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) 0) |ULTIMATE.start_main_~ptr~0#1.offset|) (= |ULTIMATE.start_sll_create_#res#1.offset| 0) (= |ULTIMATE.start_main_~data~0#1| 1) (exists ((|v_ULTIMATE.start_sll_append_~head#1.base_15| Int) (|v_#memory_$Pointer$.offset_65| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_append_#in~head#1.base_11| Int) (|v_#memory_$Pointer$.base_68| (Array Int (Array Int Int))) (|v_#memory_int_72| (Array Int (Array Int Int)))) (and (= |#memory_$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$.offset_65| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0) 0) (= |#memory_$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$.base_68| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0) 0) (= |#memory_int| (store |v_#memory_int_72| |v_ULTIMATE.start_sll_append_~head#1.base_15| (store (select |v_#memory_int_72| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0 (select (select |#memory_int| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0)))) (or (and (exists ((|v_#memory_int_71| (Array Int (Array Int Int))) (|v_old(#memory_int)_AFTER_CALL_20| (Array Int (Array Int Int)))) (= |v_old(#memory_int)_AFTER_CALL_20| (store |v_#memory_int_71| |ULTIMATE.start_sll_create_#res#1.base| (store (select |v_#memory_int_71| |ULTIMATE.start_sll_create_#res#1.base|) 4 (select (select |v_old(#memory_int)_AFTER_CALL_20| |ULTIMATE.start_sll_create_#res#1.base|) 4))))) (exists ((|v_#memory_$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$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0)) 0))))) (= |v_ULTIMATE.start_sll_append_#in~head#1.base_11| |v_ULTIMATE.start_sll_append_~head#1.base_15|) (exists ((|v_#memory_$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$.base_68|)) (= |v_ULTIMATE.start_sll_append_#in~head#1.base_11| |ULTIMATE.start_main_~#s~0#1.base|) (not (= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0))) (exists ((|v_#memory_int_68| (Array Int (Array Int Int))) (|v_#memory_int_26| (Array Int (Array Int Int)))) (and (= (store |v_#memory_int_26| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0) (store (select |v_#memory_int_26| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0)) 0 5)) |v_#memory_int_72|) (= |v_#memory_int_26| (store |v_#memory_int_68| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0) (store (select |v_#memory_int_68| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0)) 4 (select (select |v_#memory_int_26| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0)) 4)))))) (exists ((|v_#length_30| (Array Int Int))) (= (store |v_#length_30| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0) 8) |#length|)) (exists ((|v_#memory_$Pointer$.offset_64| (Array Int (Array Int Int)))) (= (select (select (store |v_#memory_$Pointer$.offset_64| |ULTIMATE.start_sll_create_#res#1.base| (store (select |v_#memory_$Pointer$.offset_64| |ULTIMATE.start_sll_create_#res#1.base|) 4 0)) |ULTIMATE.start_main_~#s~0#1.base|) 0) 0)) (exists ((|v_old(#memory_$Pointer$.base)_AFTER_CALL_20| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_67| (Array Int (Array Int Int)))) (and (= |v_old(#memory_$Pointer$.base)_AFTER_CALL_20| (store |v_#memory_$Pointer$.base_67| |ULTIMATE.start_sll_create_#res#1.base| (store (select |v_#memory_$Pointer$.base_67| |ULTIMATE.start_sll_create_#res#1.base|) 4 (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_20| |ULTIMATE.start_sll_create_#res#1.base|) 4)))) (= (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_20| |ULTIMATE.start_main_~#s~0#1.base|) 0) |ULTIMATE.start_sll_create_#res#1.base|))) (exists ((|v_#valid_40| (Array Int Int))) (and (= (store |v_#valid_40| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0) 1) |#valid|) (= (select |v_#valid_40| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0)) 0))) (<= (+ 1 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0)) |#StackHeapBarrier|)) (and (exists ((|v_#memory_$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$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0)) 0))))) (exists ((|v_old(#memory_$Pointer$.base)_AFTER_CALL_21| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_67| (Array Int (Array Int Int)))) (and (= (store |v_#memory_$Pointer$.base_67| |ULTIMATE.start_sll_create_#res#1.base| (store (select |v_#memory_$Pointer$.base_67| |ULTIMATE.start_sll_create_#res#1.base|) 4 (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_21| |ULTIMATE.start_sll_create_#res#1.base|) 4))) |v_old(#memory_$Pointer$.base)_AFTER_CALL_21|) (= (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_21| |ULTIMATE.start_main_~#s~0#1.base|) 0) |ULTIMATE.start_sll_create_#res#1.base|))) (= |v_ULTIMATE.start_sll_append_#in~head#1.base_11| |v_ULTIMATE.start_sll_append_~head#1.base_15|) (exists ((|v_#memory_$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$.base_68|)) (= |v_ULTIMATE.start_sll_append_#in~head#1.base_11| |ULTIMATE.start_main_~#s~0#1.base|) (not (= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0))) (exists ((|v_#memory_int_68| (Array Int (Array Int Int))) (|v_#memory_int_26| (Array Int (Array Int Int)))) (and (= (store |v_#memory_int_26| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0) (store (select |v_#memory_int_26| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0)) 0 5)) |v_#memory_int_72|) (= |v_#memory_int_26| (store |v_#memory_int_68| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0) (store (select |v_#memory_int_68| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0)) 4 (select (select |v_#memory_int_26| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0)) 4)))))) (exists ((|v_#memory_int_71| (Array Int (Array Int Int))) (|v_old(#memory_int)_AFTER_CALL_21| (Array Int (Array Int Int)))) (= |v_old(#memory_int)_AFTER_CALL_21| (store |v_#memory_int_71| |ULTIMATE.start_sll_create_#res#1.base| (store (select |v_#memory_int_71| |ULTIMATE.start_sll_create_#res#1.base|) 4 (select (select |v_old(#memory_int)_AFTER_CALL_21| |ULTIMATE.start_sll_create_#res#1.base|) 4))))) (exists ((|v_#length_30| (Array Int Int))) (= (store |v_#length_30| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0) 8) |#length|)) (exists ((|v_#memory_$Pointer$.offset_64| (Array Int (Array Int Int)))) (= (select (select (store |v_#memory_$Pointer$.offset_64| |ULTIMATE.start_sll_create_#res#1.base| (store (select |v_#memory_$Pointer$.offset_64| |ULTIMATE.start_sll_create_#res#1.base|) 4 0)) |ULTIMATE.start_main_~#s~0#1.base|) 0) 0)) (exists ((|v_#valid_40| (Array Int Int))) (and (= (store |v_#valid_40| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0) 1) |#valid|) (= (select |v_#valid_40| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0)) 0))) (<= (+ 1 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~head#1.base_15|) 0)) |#StackHeapBarrier|))))) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) 0) |ULTIMATE.start_main_~ptr~0#1.base|) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|))' at error location [2023-11-19 04:54:18,871 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:54:18,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 04:54:18,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2023-11-19 04:54:18,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995507166] [2023-11-19 04:54:18,872 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 04:54:18,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-19 04:54:18,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:54:18,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 04:54:18,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=954, Unknown=6, NotChecked=62, Total=1122 [2023-11-19 04:54:18,875 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand has 20 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-19 04:54:19,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:54:19,431 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2023-11-19 04:54:19,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 04:54:19,432 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 24 [2023-11-19 04:54:19,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:54:19,433 INFO L225 Difference]: With dead ends: 37 [2023-11-19 04:54:19,433 INFO L226 Difference]: Without dead ends: 27 [2023-11-19 04:54:19,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=144, Invalid=1260, Unknown=6, NotChecked=72, Total=1482 [2023-11-19 04:54:19,436 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 32 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:54:19,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 198 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 183 Invalid, 0 Unknown, 32 Unchecked, 0.2s Time] [2023-11-19 04:54:19,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-19 04:54:19,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-11-19 04:54:19,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 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) [2023-11-19 04:54:19,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2023-11-19 04:54:19,448 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 24 [2023-11-19 04:54:19,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:54:19,449 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2023-11-19 04:54:19,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-19 04:54:19,450 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2023-11-19 04:54:19,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-19 04:54:19,451 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:54:19,451 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:54:19,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb66b30e-13fc-4c2d-afdb-eb0cc89a85cf/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-19 04:54:19,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb66b30e-13fc-4c2d-afdb-eb0cc89a85cf/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:54:19,653 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:54:19,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:54:19,653 INFO L85 PathProgramCache]: Analyzing trace with hash 975690952, now seen corresponding path program 1 times [2023-11-19 04:54:19,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:54:19,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791432991] [2023-11-19 04:54:19,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:54:19,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:54:19,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:54:21,050 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 04:54:21,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:54:21,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791432991] [2023-11-19 04:54:21,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791432991] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:54:21,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962869632] [2023-11-19 04:54:21,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:54:21,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:54:21,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb66b30e-13fc-4c2d-afdb-eb0cc89a85cf/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:54:21,056 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb66b30e-13fc-4c2d-afdb-eb0cc89a85cf/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:54:21,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb66b30e-13fc-4c2d-afdb-eb0cc89a85cf/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 04:54:21,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:54:21,192 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 79 conjunts are in the unsatisfiable core [2023-11-19 04:54:21,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:54:21,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-19 04:54:21,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-19 04:54:21,684 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 04:54:21,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2023-11-19 04:54:21,699 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 7 treesize of output 3 [2023-11-19 04:54:21,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2023-11-19 04:54:21,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:54:21,905 INFO L349 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-11-19 04:54:21,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 35 [2023-11-19 04:54:21,923 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-11-19 04:54:21,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-11-19 04:54:21,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:54:21,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-19 04:54:22,257 INFO L349 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2023-11-19 04:54:22,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2023-11-19 04:54:22,325 INFO L349 Elim1Store]: treesize reduction 82, result has 29.9 percent of original size [2023-11-19 04:54:22,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 49 [2023-11-19 04:54:22,769 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 04:54:22,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 104 [2023-11-19 04:54:22,928 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 04:54:22,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 85 treesize of output 185 [2023-11-19 04:54:23,882 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:54:23,882 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:54:24,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962869632] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:54:24,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [572469658] [2023-11-19 04:54:24,735 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-11-19 04:54:24,735 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:54:24,735 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:54:24,736 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:54:24,736 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:54:26,066 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 122 for LOIs [2023-11-19 04:54:26,245 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:54:39,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [572469658] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:54:39,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 04:54:39,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [16, 21] total 47 [2023-11-19 04:54:39,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204672269] [2023-11-19 04:54:39,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:54:39,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 04:54:39,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:54:39,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 04:54:39,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=2577, Unknown=2, NotChecked=0, Total=2756 [2023-11-19 04:54:39,144 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 16 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 states have internal predecessors, (15), 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)