./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/sll2c_prepend_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88f603bf-11a9-464a-92e6-203b6493d1cb/bin/utaipan-verify-FOvIYxoinp/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88f603bf-11a9-464a-92e6-203b6493d1cb/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_88f603bf-11a9-464a-92e6-203b6493d1cb/bin/utaipan-verify-FOvIYxoinp/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88f603bf-11a9-464a-92e6-203b6493d1cb/bin/utaipan-verify-FOvIYxoinp/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/sll2c_prepend_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88f603bf-11a9-464a-92e6-203b6493d1cb/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_88f603bf-11a9-464a-92e6-203b6493d1cb/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 f2f6ef7968fa573a7da88ae0a516f1d800f437d82b0fa75227e8d7d318952eb1 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:05:49,002 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:05:49,087 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88f603bf-11a9-464a-92e6-203b6493d1cb/bin/utaipan-verify-FOvIYxoinp/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-06 21:05:49,093 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:05:49,094 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:05:49,119 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:05:49,120 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:05:49,121 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:05:49,122 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:05:49,123 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:05:49,123 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-06 21:05:49,124 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-06 21:05:49,125 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-06 21:05:49,125 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-06 21:05:49,126 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-06 21:05:49,127 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-06 21:05:49,127 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-06 21:05:49,128 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-06 21:05:49,129 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-06 21:05:49,129 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-06 21:05:49,130 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-06 21:05:49,131 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-06 21:05:49,132 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:05:49,132 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 21:05:49,133 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:05:49,133 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:05:49,134 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:05:49,134 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:05:49,135 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 21:05:49,135 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:05:49,136 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 21:05:49,137 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:05:49,137 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 21:05:49,138 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:05:49,138 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:05:49,138 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:05:49,139 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:05:49,139 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:05:49,139 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:05:49,139 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 21:05:49,139 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-06 21:05:49,144 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:05:49,144 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 21:05:49,145 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-06 21:05:49,145 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:05:49,145 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_88f603bf-11a9-464a-92e6-203b6493d1cb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88f603bf-11a9-464a-92e6-203b6493d1cb/bin/utaipan-verify-FOvIYxoinp Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f2f6ef7968fa573a7da88ae0a516f1d800f437d82b0fa75227e8d7d318952eb1 [2023-11-06 21:05:49,398 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:05:49,429 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:05:49,431 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:05:49,433 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:05:49,433 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:05:49,436 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88f603bf-11a9-464a-92e6-203b6493d1cb/bin/utaipan-verify-FOvIYxoinp/../../sv-benchmarks/c/list-simple/sll2c_prepend_unequal.i [2023-11-06 21:05:52,657 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:05:52,955 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:05:52,956 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88f603bf-11a9-464a-92e6-203b6493d1cb/sv-benchmarks/c/list-simple/sll2c_prepend_unequal.i [2023-11-06 21:05:52,978 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88f603bf-11a9-464a-92e6-203b6493d1cb/bin/utaipan-verify-FOvIYxoinp/data/5fa8d7982/749a99c2e7b843eeb86d1e691d3feb15/FLAG8a4c4149b [2023-11-06 21:05:52,993 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88f603bf-11a9-464a-92e6-203b6493d1cb/bin/utaipan-verify-FOvIYxoinp/data/5fa8d7982/749a99c2e7b843eeb86d1e691d3feb15 [2023-11-06 21:05:52,997 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:05:52,999 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:05:53,001 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:05:53,001 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:05:53,006 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:05:53,007 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:05:52" (1/1) ... [2023-11-06 21:05:53,009 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36d47bf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:05:53, skipping insertion in model container [2023-11-06 21:05:53,009 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:05:52" (1/1) ... [2023-11-06 21:05:53,057 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:05:53,415 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_88f603bf-11a9-464a-92e6-203b6493d1cb/sv-benchmarks/c/list-simple/sll2c_prepend_unequal.i[24547,24560] [2023-11-06 21:05:53,427 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:05:53,438 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:05:53,501 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_88f603bf-11a9-464a-92e6-203b6493d1cb/sv-benchmarks/c/list-simple/sll2c_prepend_unequal.i[24547,24560] [2023-11-06 21:05:53,502 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:05:53,541 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:05:53,542 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:05:53 WrapperNode [2023-11-06 21:05:53,542 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:05:53,543 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:05:53,544 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:05:53,544 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:05:53,553 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:05:53" (1/1) ... [2023-11-06 21:05:53,567 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:05:53" (1/1) ... [2023-11-06 21:05:53,595 INFO L138 Inliner]: procedures = 127, calls = 45, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 149 [2023-11-06 21:05:53,596 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:05:53,597 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:05:53,597 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:05:53,597 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:05:53,607 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:05:53" (1/1) ... [2023-11-06 21:05:53,608 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:05:53" (1/1) ... [2023-11-06 21:05:53,613 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:05:53" (1/1) ... [2023-11-06 21:05:53,613 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:05:53" (1/1) ... [2023-11-06 21:05:53,624 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:05:53" (1/1) ... [2023-11-06 21:05:53,629 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:05:53" (1/1) ... [2023-11-06 21:05:53,632 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:05:53" (1/1) ... [2023-11-06 21:05:53,633 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:05:53" (1/1) ... [2023-11-06 21:05:53,638 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:05:53,639 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:05:53,639 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:05:53,639 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:05:53,640 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:05:53" (1/1) ... [2023-11-06 21:05:53,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:05:53,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88f603bf-11a9-464a-92e6-203b6493d1cb/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:05:53,682 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88f603bf-11a9-464a-92e6-203b6493d1cb/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:05:53,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88f603bf-11a9-464a-92e6-203b6493d1cb/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:05:53,724 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 21:05:53,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 21:05:53,725 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-11-06 21:05:53,725 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-11-06 21:05:53,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 21:05:53,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:05:53,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 21:05:53,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-06 21:05:53,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-06 21:05:53,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 21:05:53,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-06 21:05:53,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:05:53,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:05:53,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:05:53,873 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:05:53,880 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:05:54,157 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:05:54,226 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:05:54,231 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-06 21:05:54,234 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:05:54 BoogieIcfgContainer [2023-11-06 21:05:54,235 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:05:54,238 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:05:54,238 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:05:54,242 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:05:54,242 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:05:52" (1/3) ... [2023-11-06 21:05:54,243 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@527bc93a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:05:54, skipping insertion in model container [2023-11-06 21:05:54,244 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:05:53" (2/3) ... [2023-11-06 21:05:54,244 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@527bc93a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:05:54, skipping insertion in model container [2023-11-06 21:05:54,244 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:05:54" (3/3) ... [2023-11-06 21:05:54,246 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2c_prepend_unequal.i [2023-11-06 21:05:54,267 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:05:54,267 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 21:05:54,321 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:05:54,329 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;@335bb2cf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 21:05:54,330 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 21:05:54,334 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 23 states have (on average 1.565217391304348) internal successors, (36), 24 states have internal predecessors, (36), 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 21:05:54,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-06 21:05:54,341 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:05:54,342 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:05:54,343 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:05:54,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:05:54,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1759233044, now seen corresponding path program 1 times [2023-11-06 21:05:54,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:05:54,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770050081] [2023-11-06 21:05:54,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:05:54,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:05:54,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:05:54,819 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 21:05:54,820 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:05:54,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770050081] [2023-11-06 21:05:54,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770050081] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:05:54,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:05:54,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:05:54,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528112836] [2023-11-06 21:05:54,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:05:54,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:05:54,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:05:54,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:05:54,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:05:54,879 INFO L87 Difference]: Start difference. First operand has 29 states, 23 states have (on average 1.565217391304348) internal successors, (36), 24 states have internal predecessors, (36), 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 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 21:05:54,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:05:54,967 INFO L93 Difference]: Finished difference Result 55 states and 80 transitions. [2023-11-06 21:05:54,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:05:54,969 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), 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 16 [2023-11-06 21:05:54,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:05:54,977 INFO L225 Difference]: With dead ends: 55 [2023-11-06 21:05:54,977 INFO L226 Difference]: Without dead ends: 26 [2023-11-06 21:05:54,981 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 21:05:54,985 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 1 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 60 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 21:05:54,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 60 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:05:55,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-06 21:05:55,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2023-11-06 21:05:55,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 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 21:05:55,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2023-11-06 21:05:55,032 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 16 [2023-11-06 21:05:55,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:05:55,033 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2023-11-06 21:05:55,034 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), 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 21:05:55,034 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2023-11-06 21:05:55,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-06 21:05:55,036 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:05:55,070 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:05:55,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 21:05:55,070 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:05:55,071 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:05:55,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1317636448, now seen corresponding path program 1 times [2023-11-06 21:05:55,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:05:55,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697683280] [2023-11-06 21:05:55,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:05:55,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:05:55,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:05:55,945 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 21:05:55,946 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:05:55,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697683280] [2023-11-06 21:05:55,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697683280] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:05:55,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886939618] [2023-11-06 21:05:55,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:05:55,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:05:55,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88f603bf-11a9-464a-92e6-203b6493d1cb/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:05:55,951 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88f603bf-11a9-464a-92e6-203b6493d1cb/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:05:55,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88f603bf-11a9-464a-92e6-203b6493d1cb/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:05:56,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:05:56,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-06 21:05:56,168 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:05:56,384 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 21:05:56,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:05:56,450 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 21:05:56,488 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 21:05:56,508 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 21:05:56,508 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:05:56,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886939618] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:05:56,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [864281565] [2023-11-06 21:05:56,677 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-11-06 21:05:56,678 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 21:05:56,682 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 21:05:56,700 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 21:05:56,701 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 21:05:58,844 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 8 for LOIs [2023-11-06 21:05:58,866 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 21:06:00,166 WARN L861 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.offset| 0) (= |c_ULTIMATE.start_main_~uneq~0#1| 5) (= |c_ULTIMATE.start_sll_circular_create_#res#1.offset| 0) (= |c_ULTIMATE.start_main_~#s~0#1.offset| 0) (= 5 |c_ULTIMATE.start_sll_circular_prepend_~data#1|) (<= 1 |c_#StackHeapBarrier|) (let ((.cse0 (exists ((|v_#length_21| (Array Int Int))) (= (store |v_#length_21| |c_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.base| 8) |c_#length|))) (.cse1 (exists ((|v_#valid_33| (Array Int Int))) (and (= (select |v_#valid_33| |c_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.base|) 0) (= |c_#valid| (store |v_#valid_33| |c_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.base| 1))))) (.cse2 (not (= |c_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.base| 0))) (.cse3 (exists ((|v_#memory_int_40| (Array Int (Array Int Int))) (|v_#memory_int_66| (Array Int (Array Int Int)))) (let ((.cse9 (select |v_#memory_int_40| |c_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.base|))) (and (= (store |v_#memory_int_66| |c_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.base| (store (select |v_#memory_int_66| |c_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.base|) 0 (select .cse9 0))) |v_#memory_int_40|) (= (store |v_#memory_int_40| |c_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.base| (store .cse9 4 5)) |c_#memory_int|))))) (.cse4 (= |c_ULTIMATE.start_sll_circular_prepend_#in~head#1.base| |c_ULTIMATE.start_main_~#s~0#1.base|)) (.cse5 (= |c_ULTIMATE.start_sll_circular_prepend_#in~head#1.base| |c_ULTIMATE.start_sll_circular_prepend_~head#1.base|)) (.cse6 (exists ((|v_#memory_$Pointer$.base_59| (Array Int (Array Int Int)))) (= |c_#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_59| |c_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.base| (store (store (select |v_#memory_$Pointer$.base_59| |c_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.base|) 0 0) 4 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.base|) 4)))))) (.cse7 (<= (+ |c_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.base| 1) |c_#StackHeapBarrier|)) (.cse8 (exists ((|v_#memory_$Pointer$.offset_56| (Array Int (Array Int Int)))) (= |c_#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_56| |c_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.base| (store (store (select |v_#memory_$Pointer$.offset_56| |c_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.base|) 0 0) 4 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.base|) 4))))))) (or (and .cse0 .cse1 .cse2 .cse3 (exists ((|v_#memory_$Pointer$.base_62| (Array Int (Array Int Int))) (|v_#memory_int_69| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_59| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15| Int) (|v_old(#memory_int)_AFTER_CALL_12| (Array Int (Array Int Int)))) (and (= |c_ULTIMATE.start_sll_circular_create_#res#1.base| (select (select (store |v_#memory_$Pointer$.base_62| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15| (store (select |v_#memory_$Pointer$.base_62| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15|) 0 |c_ULTIMATE.start_sll_circular_create_#res#1.base|)) |c_ULTIMATE.start_main_~#s~0#1.base|) 0)) (= |v_old(#memory_int)_AFTER_CALL_12| (store |v_#memory_int_69| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15| (store (select |v_#memory_int_69| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15|) 0 (select (select |v_old(#memory_int)_AFTER_CALL_12| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15|) 0)))) (= (select (select (store |v_#memory_$Pointer$.offset_59| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15| (store (select |v_#memory_$Pointer$.offset_59| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15|) 0 0)) |c_ULTIMATE.start_main_~#s~0#1.base|) 0) 0))) .cse4 .cse5 .cse6 .cse7 .cse8) (and .cse0 .cse1 (exists ((|v_old(#memory_int)_AFTER_CALL_13| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_62| (Array Int (Array Int Int))) (|v_#memory_int_69| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_59| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15| Int)) (and (= |v_old(#memory_int)_AFTER_CALL_13| (store |v_#memory_int_69| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15| (store (select |v_#memory_int_69| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15|) 0 (select (select |v_old(#memory_int)_AFTER_CALL_13| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15|) 0)))) (= |c_ULTIMATE.start_sll_circular_create_#res#1.base| (select (select (store |v_#memory_$Pointer$.base_62| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15| (store (select |v_#memory_$Pointer$.base_62| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15|) 0 |c_ULTIMATE.start_sll_circular_create_#res#1.base|)) |c_ULTIMATE.start_main_~#s~0#1.base|) 0)) (= (select (select (store |v_#memory_$Pointer$.offset_59| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15| (store (select |v_#memory_$Pointer$.offset_59| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15|) 0 0)) |c_ULTIMATE.start_main_~#s~0#1.base|) 0) 0))) .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8))) (= |c_ULTIMATE.start_main_~data~0#1| 1) (= |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset| 0) (<= 2 |c_ULTIMATE.start_main_~#s~0#1.base|) (<= 2 |c_ULTIMATE.start_sll_circular_prepend_#in~head#1.base|) (= |c_ULTIMATE.start_sll_circular_prepend_#in~data#1| 5) (= |c_ULTIMATE.start_sll_circular_prepend_#in~head#1.offset| 0) (<= 2 |c_ULTIMATE.start_sll_circular_prepend_~head#1.base|) (= |c_ULTIMATE.start_main_~len~0#1| 2)) is different from true [2023-11-06 21:06:04,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [864281565] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:06:04,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:06:04,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [13, 13] total 33 [2023-11-06 21:06:04,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64656184] [2023-11-06 21:06:04,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:06:04,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 21:06:04,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:06:04,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 21:06:04,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1010, Unknown=12, NotChecked=64, Total=1190 [2023-11-06 21:06:04,911 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 15 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 10 states have internal predecessors, (12), 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 21:06:07,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:06:07,315 INFO L93 Difference]: Finished difference Result 28 states and 35 transitions. [2023-11-06 21:06:07,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 21:06:07,316 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 10 states have internal predecessors, (12), 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 22 [2023-11-06 21:06:07,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:06:07,317 INFO L225 Difference]: With dead ends: 28 [2023-11-06 21:06:07,317 INFO L226 Difference]: Without dead ends: 26 [2023-11-06 21:06:07,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=104, Invalid=1010, Unknown=12, NotChecked=64, Total=1190 [2023-11-06 21:06:07,320 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-06 21:06:07,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 65 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 215 Invalid, 4 Unknown, 44 Unchecked, 2.4s Time] [2023-11-06 21:06:07,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-06 21:06:07,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-06 21:06:07,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 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 21:06:07,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2023-11-06 21:06:07,331 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 22 [2023-11-06 21:06:07,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:06:07,332 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2023-11-06 21:06:07,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 10 states have internal predecessors, (12), 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 21:06:07,333 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2023-11-06 21:06:07,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-06 21:06:07,334 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:06:07,334 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] [2023-11-06 21:06:07,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88f603bf-11a9-464a-92e6-203b6493d1cb/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 21:06:07,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88f603bf-11a9-464a-92e6-203b6493d1cb/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:06:07,543 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:06:07,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:06:07,543 INFO L85 PathProgramCache]: Analyzing trace with hash -766704741, now seen corresponding path program 1 times [2023-11-06 21:06:07,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:06:07,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322378628] [2023-11-06 21:06:07,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:06:07,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:06:07,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:06:08,059 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 21:06:08,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:06:08,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322378628] [2023-11-06 21:06:08,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322378628] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:06:08,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786649561] [2023-11-06 21:06:08,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:06:08,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:06:08,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88f603bf-11a9-464a-92e6-203b6493d1cb/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:06:08,063 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88f603bf-11a9-464a-92e6-203b6493d1cb/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:06:08,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88f603bf-11a9-464a-92e6-203b6493d1cb/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:06:08,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:06:08,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-06 21:06:08,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:06:08,409 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 21:06:08,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:06:08,466 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 21:06:08,502 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 21:06:08,523 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 21:06:08,524 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:06:08,602 WARN L839 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.base_19| Int) (v_ArrVal_300 (Array Int Int))) (or (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.base_19| 1)) (not (= (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.base_19| v_ArrVal_300) |c_ULTIMATE.start_sll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset|) 0)))) is different from false [2023-11-06 21:06:08,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786649561] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:06:08,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1140736441] [2023-11-06 21:06:08,610 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-11-06 21:06:08,611 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 21:06:08,611 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 21:06:08,612 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 21:06:08,612 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 21:06:10,141 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 8 for LOIs [2023-11-06 21:06:10,154 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 21:06:24,667 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '448#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~count~0#1| 1) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) 0)) (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) 0)) |ULTIMATE.start_main_~ptr~0#1.offset|) (= |ULTIMATE.start_sll_circular_create_#res#1.offset| 0) (= |ULTIMATE.start_main_~uneq~0#1| 5) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_main_~ptr~0#1.base| (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) 0)) (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) 0))) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4)) 1)) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|) (= 5 (select (select |#memory_int| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) 0)) (+ (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) 0) 4))) (exists ((|v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_15| Int) (|v_#memory_$Pointer$.base_77| (Array Int (Array Int Int))) (|v_#memory_int_89| (Array Int (Array Int Int))) (|v_#memory_int_15| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_circular_prepend_#in~head#1.base_10| Int) (|v_ULTIMATE.start_sll_circular_prepend_~head#1.base_16| Int) (|v_#memory_$Pointer$.offset_71| (Array Int (Array Int Int)))) (and (<= 2 |v_ULTIMATE.start_sll_circular_prepend_~head#1.base_16|) (= |#memory_$Pointer$.offset| (store (store |v_#memory_$Pointer$.offset_71| |v_ULTIMATE.start_sll_circular_prepend_~head#1.base_16| (store (select |v_#memory_$Pointer$.offset_71| |v_ULTIMATE.start_sll_circular_prepend_~head#1.base_16|) 0 0)) |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_15| (store (select (store |v_#memory_$Pointer$.offset_71| |v_ULTIMATE.start_sll_circular_prepend_~head#1.base_16| (store (select |v_#memory_$Pointer$.offset_71| |v_ULTIMATE.start_sll_circular_prepend_~head#1.base_16|) 0 0)) |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_15|) 0 0))) (= (select (select |v_#memory_$Pointer$.base_77| |v_ULTIMATE.start_sll_circular_prepend_~head#1.base_16|) 0) 0) (= |v_#memory_int_15| (store |v_#memory_int_89| |v_ULTIMATE.start_sll_circular_prepend_~head#1.base_16| (store (select |v_#memory_int_89| |v_ULTIMATE.start_sll_circular_prepend_~head#1.base_16|) 0 (select (select |v_#memory_int_15| |v_ULTIMATE.start_sll_circular_prepend_~head#1.base_16|) 0)))) (= (store |v_#memory_int_15| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_15| (store (select |v_#memory_int_15| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_15|) 0 (select (select |#memory_int| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_15|) 0))) |#memory_int|) (= (store (store |v_#memory_$Pointer$.base_77| |v_ULTIMATE.start_sll_circular_prepend_~head#1.base_16| (store (select |v_#memory_$Pointer$.base_77| |v_ULTIMATE.start_sll_circular_prepend_~head#1.base_16|) 0 |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_15|)) |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_15| (store (select (store |v_#memory_$Pointer$.base_77| |v_ULTIMATE.start_sll_circular_prepend_~head#1.base_16| (store (select |v_#memory_$Pointer$.base_77| |v_ULTIMATE.start_sll_circular_prepend_~head#1.base_16|) 0 |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_15|)) |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_15|) 0 |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_15|)) |#memory_$Pointer$.base|) (= (select (select |v_#memory_$Pointer$.offset_71| |v_ULTIMATE.start_sll_circular_prepend_~head#1.base_16|) 0) 0) (or (and (= |v_ULTIMATE.start_sll_circular_prepend_#in~head#1.base_10| |v_ULTIMATE.start_sll_circular_prepend_~head#1.base_16|) (exists ((|v_#memory_$Pointer$.offset_67| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.offset_67| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_15| (store (store (select |v_#memory_$Pointer$.offset_67| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_15|) 0 0) 4 (select (select |v_#memory_$Pointer$.offset_71| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_15|) 4))) |v_#memory_$Pointer$.offset_71|)) (= |v_ULTIMATE.start_sll_circular_prepend_#in~head#1.base_10| |ULTIMATE.start_main_~#s~0#1.base|) (exists ((|v_#length_28| (Array Int Int))) (= |#length| (store |v_#length_28| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_15| 8))) (exists ((|v_#memory_int_40| (Array Int (Array Int Int))) (|v_#memory_int_85| (Array Int (Array Int Int)))) (and (= (store |v_#memory_int_85| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_15| (store (select |v_#memory_int_85| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_15|) 0 (select (select |v_#memory_int_40| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_15|) 0))) |v_#memory_int_40|) (= (store |v_#memory_int_40| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_15| (store (select |v_#memory_int_40| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_15|) 4 5)) |v_#memory_int_89|))) (exists ((|v_old(#memory_int)_AFTER_CALL_26| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_76| (Array Int (Array Int Int))) (|v_#memory_int_88| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_16| Int) (|v_#memory_$Pointer$.offset_70| (Array Int (Array Int Int)))) (and (= |v_old(#memory_int)_AFTER_CALL_26| (store |v_#memory_int_88| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_16| (store (select |v_#memory_int_88| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_16|) 0 (select (select |v_old(#memory_int)_AFTER_CALL_26| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_16|) 0)))) (= (select (select (store |v_#memory_$Pointer$.base_76| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_16| (store (select |v_#memory_$Pointer$.base_76| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_16|) 0 |ULTIMATE.start_sll_circular_create_#res#1.base|)) |ULTIMATE.start_main_~#s~0#1.base|) 0) |ULTIMATE.start_sll_circular_create_#res#1.base|) (= (select (select (store |v_#memory_$Pointer$.offset_70| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_16| (store (select |v_#memory_$Pointer$.offset_70| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_16|) 0 0)) |ULTIMATE.start_main_~#s~0#1.base|) 0) 0))) (exists ((|v_#valid_40| (Array Int Int))) (and (= (store |v_#valid_40| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_15| 1) |#valid|) (= (select |v_#valid_40| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_15|) 0))) (not (= |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_15| 0)) (<= (+ |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_15| 1) |#StackHeapBarrier|) (exists ((|v_#memory_$Pointer$.base_73| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_73| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_15| (store (store (select |v_#memory_$Pointer$.base_73| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_15|) 0 0) 4 (select (select |v_#memory_$Pointer$.base_77| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_15|) 4))) |v_#memory_$Pointer$.base_77|))) (and (= |v_ULTIMATE.start_sll_circular_prepend_#in~head#1.base_10| |v_ULTIMATE.start_sll_circular_prepend_~head#1.base_16|) (exists ((|v_#memory_$Pointer$.base_76| (Array Int (Array Int Int))) (|v_old(#memory_int)_AFTER_CALL_25| (Array Int (Array Int Int))) (|v_#memory_int_88| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_16| Int) (|v_#memory_$Pointer$.offset_70| (Array Int (Array Int Int)))) (and (= (select (select (store |v_#memory_$Pointer$.base_76| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_16| (store (select |v_#memory_$Pointer$.base_76| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_16|) 0 |ULTIMATE.start_sll_circular_create_#res#1.base|)) |ULTIMATE.start_main_~#s~0#1.base|) 0) |ULTIMATE.start_sll_circular_create_#res#1.base|) (= (select (select (store |v_#memory_$Pointer$.offset_70| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_16| (store (select |v_#memory_$Pointer$.offset_70| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_16|) 0 0)) |ULTIMATE.start_main_~#s~0#1.base|) 0) 0) (= |v_old(#memory_int)_AFTER_CALL_25| (store |v_#memory_int_88| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_16| (store (select |v_#memory_int_88| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_16|) 0 (select (select |v_old(#memory_int)_AFTER_CALL_25| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_16|) 0)))))) (exists ((|v_#memory_$Pointer$.offset_67| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.offset_67| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_15| (store (store (select |v_#memory_$Pointer$.offset_67| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_15|) 0 0) 4 (select (select |v_#memory_$Pointer$.offset_71| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_15|) 4))) |v_#memory_$Pointer$.offset_71|)) (= |v_ULTIMATE.start_sll_circular_prepend_#in~head#1.base_10| |ULTIMATE.start_main_~#s~0#1.base|) (exists ((|v_#length_28| (Array Int Int))) (= |#length| (store |v_#length_28| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_15| 8))) (exists ((|v_#memory_int_40| (Array Int (Array Int Int))) (|v_#memory_int_85| (Array Int (Array Int Int)))) (and (= (store |v_#memory_int_85| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_15| (store (select |v_#memory_int_85| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_15|) 0 (select (select |v_#memory_int_40| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_15|) 0))) |v_#memory_int_40|) (= (store |v_#memory_int_40| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_15| (store (select |v_#memory_int_40| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_15|) 4 5)) |v_#memory_int_89|))) (exists ((|v_#valid_40| (Array Int Int))) (and (= (store |v_#valid_40| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_15| 1) |#valid|) (= (select |v_#valid_40| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_15|) 0))) (not (= |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_15| 0)) (<= (+ |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_15| 1) |#StackHeapBarrier|) (exists ((|v_#memory_$Pointer$.base_73| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_73| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_15| (store (store (select |v_#memory_$Pointer$.base_73| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_15|) 0 0) 4 (select (select |v_#memory_$Pointer$.base_77| |v_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base_15|) 4))) |v_#memory_$Pointer$.base_77|)))) (<= 2 |v_ULTIMATE.start_sll_circular_prepend_#in~head#1.base_10|))))' at error location [2023-11-06 21:06:24,668 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 21:06:24,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:06:24,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2023-11-06 21:06:24,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284539581] [2023-11-06 21:06:24,669 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:06:24,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 21:06:24,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:06:24,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 21:06:24,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1222, Unknown=4, NotChecked=70, Total=1406 [2023-11-06 21:06:24,672 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 20 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 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 21:06:25,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:06:25,338 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2023-11-06 21:06:25,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 21:06:25,339 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 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 24 [2023-11-06 21:06:25,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:06:25,342 INFO L225 Difference]: With dead ends: 34 [2023-11-06 21:06:25,342 INFO L226 Difference]: Without dead ends: 26 [2023-11-06 21:06:25,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=159, Invalid=1645, Unknown=6, NotChecked=82, Total=1892 [2023-11-06 21:06:25,354 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 35 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:06:25,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 150 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:06:25,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-06 21:06:25,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2023-11-06 21:06:25,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 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 21:06:25,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2023-11-06 21:06:25,363 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 24 [2023-11-06 21:06:25,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:06:25,363 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2023-11-06 21:06:25,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 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 21:06:25,364 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2023-11-06 21:06:25,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-06 21:06:25,365 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:06:25,365 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 21:06:25,376 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88f603bf-11a9-464a-92e6-203b6493d1cb/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-06 21:06:25,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88f603bf-11a9-464a-92e6-203b6493d1cb/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-06 21:06:25,572 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:06:25,572 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:06:25,572 INFO L85 PathProgramCache]: Analyzing trace with hash -845270189, now seen corresponding path program 1 times [2023-11-06 21:06:25,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:06:25,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681055463] [2023-11-06 21:06:25,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:06:25,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:06:25,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat