./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 cf1a7837 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_ca7f41da-6fe2-4751-8bec-305d91e64e3e/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7f41da-6fe2-4751-8bec-305d91e64e3e/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7f41da-6fe2-4751-8bec-305d91e64e3e/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7f41da-6fe2-4751-8bec-305d91e64e3e/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/sll2c_prepend_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7f41da-6fe2-4751-8bec-305d91e64e3e/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7f41da-6fe2-4751-8bec-305d91e64e3e/bin/utaipan-verify-NcY6lQBIFX --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 f2f6ef7968fa573a7da88ae0a516f1d800f437d82b0fa75227e8d7d318952eb1 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:57:34,160 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:57:34,261 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7f41da-6fe2-4751-8bec-305d91e64e3e/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:57:34,267 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:57:34,269 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:57:34,310 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:57:34,312 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:57:34,312 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:57:34,313 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:57:34,318 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:57:34,318 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:57:34,319 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:57:34,319 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:57:34,321 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:57:34,321 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:57:34,322 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:57:34,322 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:57:34,323 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:57:34,323 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:57:34,323 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:57:34,324 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:57:34,324 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:57:34,326 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:57:34,326 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:57:34,326 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:57:34,327 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:57:34,327 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:57:34,328 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:57:34,328 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:57:34,329 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:57:34,330 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:57:34,330 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:57:34,330 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:57:34,331 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:57:34,331 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:57:34,331 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:57:34,331 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:57:34,332 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:57:34,332 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:57:34,332 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:57:34,333 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:57:34,333 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:57:34,333 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:57:34,333 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:57:34,334 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:57:34,334 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_ca7f41da-6fe2-4751-8bec-305d91e64e3e/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7f41da-6fe2-4751-8bec-305d91e64e3e/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f2f6ef7968fa573a7da88ae0a516f1d800f437d82b0fa75227e8d7d318952eb1 [2023-11-12 00:57:34,594 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:57:34,616 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:57:34,619 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:57:34,620 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:57:34,621 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:57:34,622 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7f41da-6fe2-4751-8bec-305d91e64e3e/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/list-simple/sll2c_prepend_unequal.i [2023-11-12 00:57:37,773 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:57:38,124 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:57:38,125 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7f41da-6fe2-4751-8bec-305d91e64e3e/sv-benchmarks/c/list-simple/sll2c_prepend_unequal.i [2023-11-12 00:57:38,140 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7f41da-6fe2-4751-8bec-305d91e64e3e/bin/utaipan-verify-NcY6lQBIFX/data/1e161286c/2e8f2d74ca7e4ab9adeb653054e75a36/FLAGd427eebbe [2023-11-12 00:57:38,406 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7f41da-6fe2-4751-8bec-305d91e64e3e/bin/utaipan-verify-NcY6lQBIFX/data/1e161286c/2e8f2d74ca7e4ab9adeb653054e75a36 [2023-11-12 00:57:38,410 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:57:38,412 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:57:38,420 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:57:38,420 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:57:38,427 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:57:38,428 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:57:38" (1/1) ... [2023-11-12 00:57:38,430 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19fb48b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:57:38, skipping insertion in model container [2023-11-12 00:57:38,431 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:57:38" (1/1) ... [2023-11-12 00:57:38,504 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:57:38,863 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_ca7f41da-6fe2-4751-8bec-305d91e64e3e/sv-benchmarks/c/list-simple/sll2c_prepend_unequal.i[24547,24560] [2023-11-12 00:57:38,868 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:57:38,881 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:57:38,978 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_ca7f41da-6fe2-4751-8bec-305d91e64e3e/sv-benchmarks/c/list-simple/sll2c_prepend_unequal.i[24547,24560] [2023-11-12 00:57:38,982 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:57:39,032 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:57:39,033 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:57:39 WrapperNode [2023-11-12 00:57:39,033 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:57:39,035 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:57:39,035 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:57:39,036 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:57:39,045 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:57:39" (1/1) ... [2023-11-12 00:57:39,084 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:57:39" (1/1) ... [2023-11-12 00:57:39,131 INFO L138 Inliner]: procedures = 127, calls = 45, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 149 [2023-11-12 00:57:39,131 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:57:39,132 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:57:39,132 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:57:39,132 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:57:39,145 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:57:39" (1/1) ... [2023-11-12 00:57:39,145 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:57:39" (1/1) ... [2023-11-12 00:57:39,150 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:57:39" (1/1) ... [2023-11-12 00:57:39,150 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:57:39" (1/1) ... [2023-11-12 00:57:39,168 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:57:39" (1/1) ... [2023-11-12 00:57:39,179 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:57:39" (1/1) ... [2023-11-12 00:57:39,187 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:57:39" (1/1) ... [2023-11-12 00:57:39,189 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:57:39" (1/1) ... [2023-11-12 00:57:39,193 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:57:39,194 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:57:39,194 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:57:39,194 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:57:39,195 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:57:39" (1/1) ... [2023-11-12 00:57:39,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:57:39,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7f41da-6fe2-4751-8bec-305d91e64e3e/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:57:39,234 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7f41da-6fe2-4751-8bec-305d91e64e3e/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:57:39,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7f41da-6fe2-4751-8bec-305d91e64e3e/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:57:39,277 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:57:39,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:57:39,278 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-11-12 00:57:39,278 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-11-12 00:57:39,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 00:57:39,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:57:39,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:57:39,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 00:57:39,281 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 00:57:39,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:57:39,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-12 00:57:39,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:57:39,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:57:39,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:57:39,427 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:57:39,429 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:57:39,706 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:57:39,793 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:57:39,793 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-12 00:57:39,796 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:57:39 BoogieIcfgContainer [2023-11-12 00:57:39,796 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:57:39,800 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:57:39,800 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:57:39,804 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:57:39,804 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:57:38" (1/3) ... [2023-11-12 00:57:39,805 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15e5b94c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:57:39, skipping insertion in model container [2023-11-12 00:57:39,806 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:57:39" (2/3) ... [2023-11-12 00:57:39,806 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15e5b94c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:57:39, skipping insertion in model container [2023-11-12 00:57:39,806 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:57:39" (3/3) ... [2023-11-12 00:57:39,808 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2c_prepend_unequal.i [2023-11-12 00:57:39,832 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:57:39,833 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:57:39,905 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:57:39,912 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;@7e37d935, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:57:39,913 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:57:39,917 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) [2023-11-12 00:57:39,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-12 00:57:39,924 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:57:39,925 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:57:39,925 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:57:39,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:57:39,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1759233044, now seen corresponding path program 1 times [2023-11-12 00:57:39,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:57:39,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557952501] [2023-11-12 00:57:39,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:39,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:57:40,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:40,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 00:57:40,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:57:40,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557952501] [2023-11-12 00:57:40,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557952501] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:57:40,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:57:40,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:57:40,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49915042] [2023-11-12 00:57:40,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:57:40,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:57:40,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:57:40,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:57:40,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:57:40,534 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) [2023-11-12 00:57:40,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:57:40,606 INFO L93 Difference]: Finished difference Result 55 states and 80 transitions. [2023-11-12 00:57:40,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:57:40,608 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 [2023-11-12 00:57:40,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:57:40,615 INFO L225 Difference]: With dead ends: 55 [2023-11-12 00:57:40,615 INFO L226 Difference]: Without dead ends: 26 [2023-11-12 00:57:40,618 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 [2023-11-12 00:57:40,622 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 [2023-11-12 00:57:40,623 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] [2023-11-12 00:57:40,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-12 00:57:40,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2023-11-12 00:57:40,659 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) [2023-11-12 00:57:40,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2023-11-12 00:57:40,661 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 16 [2023-11-12 00:57:40,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:57:40,662 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2023-11-12 00:57:40,662 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) [2023-11-12 00:57:40,662 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2023-11-12 00:57:40,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-12 00:57:40,664 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:57:40,664 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:57:40,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:57:40,665 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:57:40,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:57:40,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1317636448, now seen corresponding path program 1 times [2023-11-12 00:57:40,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:57:40,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843193709] [2023-11-12 00:57:40,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:40,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:57:40,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:41,620 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:57:41,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:57:41,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843193709] [2023-11-12 00:57:41,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843193709] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:57:41,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960999778] [2023-11-12 00:57:41,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:41,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:57:41,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7f41da-6fe2-4751-8bec-305d91e64e3e/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:57:41,628 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7f41da-6fe2-4751-8bec-305d91e64e3e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:57:41,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7f41da-6fe2-4751-8bec-305d91e64e3e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:57:41,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:41,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-12 00:57:41,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:57:42,198 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 [2023-11-12 00:57:42,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:57:42,294 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 [2023-11-12 00:57:42,390 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 [2023-11-12 00:57:42,418 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:57:42,419 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:57:42,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960999778] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:57:42,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1371762757] [2023-11-12 00:57:42,660 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-11-12 00:57:42,660 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:57:42,663 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:57:42,669 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:57:42,670 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:57:44,820 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 8 for LOIs [2023-11-12 00:57:44,836 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:57:46,267 WARN L876 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.offset| 0) (= |c_ULTIMATE.start_main_~uneq~0#1| 5) (= |c_ULTIMATE.start_sll_circular_create_#res#1.offset| 0) (= |c_ULTIMATE.start_main_~#s~0#1.offset| 0) (= 5 |c_ULTIMATE.start_sll_circular_prepend_~data#1|) (<= 1 |c_#StackHeapBarrier|) (let ((.cse0 (exists ((|v_#length_21| (Array Int Int))) (= (store |v_#length_21| |c_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.base| 8) |c_#length|))) (.cse1 (exists ((|v_#valid_33| (Array Int Int))) (and (= (select |v_#valid_33| |c_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.base|) 0) (= |c_#valid| (store |v_#valid_33| |c_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.base| 1))))) (.cse2 (not (= |c_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.base| 0))) (.cse3 (exists ((|v_#memory_int_40| (Array Int (Array Int Int))) (|v_#memory_int_66| (Array Int (Array Int Int)))) (let ((.cse9 (select |v_#memory_int_40| |c_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.base|))) (and (= (store |v_#memory_int_66| |c_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.base| (store (select |v_#memory_int_66| |c_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.base|) 0 (select .cse9 0))) |v_#memory_int_40|) (= (store |v_#memory_int_40| |c_ULTIMATE.start_sll_circular_prepend_#t~ret9#1.base| (store .cse9 4 5)) |c_#memory_int|))))) (.cse4 (= |c_ULTIMATE.start_sll_circular_prepend_#in~head#1.base| |c_ULTIMATE.start_main_~#s~0#1.base|)) (.cse5 (= |c_ULTIMATE.start_sll_circular_prepend_#in~head#1.base| |c_ULTIMATE.start_sll_circular_prepend_~head#1.base|)) (.cse6 (exists ((|v_#memory_$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 [2023-11-12 00:57:51,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1371762757] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:57:51,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:57:51,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [13, 13] total 33 [2023-11-12 00:57:51,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822343013] [2023-11-12 00:57:51,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:57:51,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-12 00:57:51,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:57:51,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-12 00:57:51,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1010, Unknown=12, NotChecked=64, Total=1190 [2023-11-12 00:57:51,468 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) [2023-11-12 00:57:54,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:57:56,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:57:56,592 INFO L93 Difference]: Finished difference Result 28 states and 35 transitions. [2023-11-12 00:57:56,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-12 00:57:56,593 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 [2023-11-12 00:57:56,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:57:56,594 INFO L225 Difference]: With dead ends: 28 [2023-11-12 00:57:56,594 INFO L226 Difference]: Without dead ends: 26 [2023-11-12 00:57:56,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=104, Invalid=1010, Unknown=12, NotChecked=64, Total=1190 [2023-11-12 00:57:56,596 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 1 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:57:56,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 247 Invalid, 5 Unknown, 44 Unchecked, 5.1s Time] [2023-11-12 00:57:56,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-12 00:57:56,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-12 00:57:56,605 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) [2023-11-12 00:57:56,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2023-11-12 00:57:56,607 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 22 [2023-11-12 00:57:56,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:57:56,607 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2023-11-12 00:57:56,608 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) [2023-11-12 00:57:56,608 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2023-11-12 00:57:56,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-12 00:57:56,609 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:57:56,609 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] [2023-11-12 00:57:56,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7f41da-6fe2-4751-8bec-305d91e64e3e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:57:56,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7f41da-6fe2-4751-8bec-305d91e64e3e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:57:56,816 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:57:56,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:57:56,823 INFO L85 PathProgramCache]: Analyzing trace with hash -766704741, now seen corresponding path program 1 times [2023-11-12 00:57:56,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:57:56,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669100866] [2023-11-12 00:57:56,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:56,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:57:56,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:57,358 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:57:57,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:57:57,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669100866] [2023-11-12 00:57:57,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669100866] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:57:57,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710730931] [2023-11-12 00:57:57,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:57,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:57:57,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7f41da-6fe2-4751-8bec-305d91e64e3e/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:57:57,365 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7f41da-6fe2-4751-8bec-305d91e64e3e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:57:57,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7f41da-6fe2-4751-8bec-305d91e64e3e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:57:57,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:57,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-12 00:57:57,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:57:57,710 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 [2023-11-12 00:57:57,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:57:57,768 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 [2023-11-12 00:57:57,807 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 [2023-11-12 00:57:57,831 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:57:57,831 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:57:57,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710730931] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:57:57,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1481939245] [2023-11-12 00:57:57,987 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-11-12 00:57:57,987 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:57:57,988 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:57:57,988 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:57:57,988 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:57:59,698 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 8 for LOIs [2023-11-12 00:57:59,710 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:58:14,784 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '438#(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 [2023-11-12 00:58:14,784 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:58:14,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:58:14,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2023-11-12 00:58:14,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418347524] [2023-11-12 00:58:14,785 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:58:14,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-12 00:58:14,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:58:14,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-12 00:58:14,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1287, Unknown=7, NotChecked=0, Total=1406 [2023-11-12 00:58:14,788 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) [2023-11-12 00:58:15,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:58:15,454 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2023-11-12 00:58:15,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 00:58:15,455 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 [2023-11-12 00:58:15,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:58:15,456 INFO L225 Difference]: With dead ends: 34 [2023-11-12 00:58:15,456 INFO L226 Difference]: Without dead ends: 26 [2023-11-12 00:58:15,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=164, Invalid=1720, Unknown=8, NotChecked=0, Total=1892 [2023-11-12 00:58:15,459 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 51 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:58:15,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 162 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:58:15,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-12 00:58:15,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2023-11-12 00:58:15,467 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) [2023-11-12 00:58:15,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2023-11-12 00:58:15,469 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 24 [2023-11-12 00:58:15,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:58:15,469 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2023-11-12 00:58:15,469 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) [2023-11-12 00:58:15,470 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2023-11-12 00:58:15,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-12 00:58:15,471 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:58:15,471 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] [2023-11-12 00:58:15,482 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7f41da-6fe2-4751-8bec-305d91e64e3e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-12 00:58:15,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7f41da-6fe2-4751-8bec-305d91e64e3e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-12 00:58:15,677 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:58:15,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:58:15,678 INFO L85 PathProgramCache]: Analyzing trace with hash -845270189, now seen corresponding path program 1 times [2023-11-12 00:58:15,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:58:15,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256523415] [2023-11-12 00:58:15,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:58:15,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:58:15,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:58:17,112 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:58:17,112 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:58:17,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256523415] [2023-11-12 00:58:17,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256523415] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:58:17,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36389897] [2023-11-12 00:58:17,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:58:17,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:58:17,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7f41da-6fe2-4751-8bec-305d91e64e3e/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:58:17,114 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7f41da-6fe2-4751-8bec-305d91e64e3e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:58:17,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7f41da-6fe2-4751-8bec-305d91e64e3e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:58:17,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:58:17,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 77 conjunts are in the unsatisfiable core [2023-11-12 00:58:17,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:58:17,336 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-12 00:58:17,548 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-12 00:58:17,548 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-12 00:58:17,620 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2023-11-12 00:58:17,735 INFO L322 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2023-11-12 00:58:17,735 INFO L351 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 57 [2023-11-12 00:58:17,810 INFO L322 Elim1Store]: treesize reduction 3, result has 81.3 percent of original size [2023-11-12 00:58:17,811 INFO L351 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 47 treesize of output 31 [2023-11-12 00:58:17,817 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 13 treesize of output 9 [2023-11-12 00:58:17,823 INFO L351 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 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-12 00:58:17,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:58:17,931 INFO L322 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-11-12 00:58:17,932 INFO L351 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 55 treesize of output 46 [2023-11-12 00:58:17,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:58:17,943 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 46 treesize of output 39 [2023-11-12 00:58:17,964 INFO L322 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2023-11-12 00:58:17,964 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 34 [2023-11-12 00:58:18,075 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 28 treesize of output 20 [2023-11-12 00:58:18,140 INFO L322 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2023-11-12 00:58:18,140 INFO L351 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 35 treesize of output 23 [2023-11-12 00:58:18,173 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:58:18,173 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:58:18,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36389897] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:58:18,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1315031541] [2023-11-12 00:58:18,442 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-11-12 00:58:18,442 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:58:18,443 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:58:18,443 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:58:18,443 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:58:20,037 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 8 for LOIs [2023-11-12 00:58:20,048 INFO L180 IcfgInterpreter]: Interpretation finished