./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/dll2n_append_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_8cd06d92-6c47-47da-9d60-41a86740bf4b/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd06d92-6c47-47da-9d60-41a86740bf4b/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_8cd06d92-6c47-47da-9d60-41a86740bf4b/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd06d92-6c47-47da-9d60-41a86740bf4b/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/dll2n_append_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd06d92-6c47-47da-9d60-41a86740bf4b/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_8cd06d92-6c47-47da-9d60-41a86740bf4b/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 8e4e2611155a39995b0fc64ec45d64e4c98f789d2737326ee819380629347be0 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:58:17,753 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:58:17,881 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd06d92-6c47-47da-9d60-41a86740bf4b/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:58:17,893 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:58:17,894 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:58:17,939 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:58:17,940 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:58:17,940 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:58:17,942 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:58:17,947 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:58:17,947 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:58:17,949 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:58:17,949 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:58:17,951 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:58:17,952 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:58:17,952 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:58:17,952 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:58:17,953 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:58:17,953 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:58:17,954 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:58:17,954 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:58:17,955 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:58:17,956 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:58:17,957 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:58:17,957 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:58:17,957 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:58:17,958 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:58:17,958 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:58:17,959 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:58:17,959 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:58:17,961 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:58:17,961 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:58:17,961 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:58:17,961 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:58:17,962 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:58:17,962 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:58:17,962 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:58:17,963 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:58:17,963 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:58:17,963 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:58:17,964 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:58:17,964 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:58:17,964 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:58:17,964 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:58:17,965 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:58:17,965 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_8cd06d92-6c47-47da-9d60-41a86740bf4b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd06d92-6c47-47da-9d60-41a86740bf4b/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8e4e2611155a39995b0fc64ec45d64e4c98f789d2737326ee819380629347be0 [2023-11-12 00:58:18,253 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:58:18,276 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:58:18,278 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:58:18,280 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:58:18,280 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:58:18,282 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd06d92-6c47-47da-9d60-41a86740bf4b/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/list-simple/dll2n_append_unequal.i [2023-11-12 00:58:21,426 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:58:21,723 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:58:21,724 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd06d92-6c47-47da-9d60-41a86740bf4b/sv-benchmarks/c/list-simple/dll2n_append_unequal.i [2023-11-12 00:58:21,744 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd06d92-6c47-47da-9d60-41a86740bf4b/bin/utaipan-verify-NcY6lQBIFX/data/06564320c/20b2cd0fca3d492f97b3b3970e9c28d7/FLAGf82cb4d13 [2023-11-12 00:58:21,763 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd06d92-6c47-47da-9d60-41a86740bf4b/bin/utaipan-verify-NcY6lQBIFX/data/06564320c/20b2cd0fca3d492f97b3b3970e9c28d7 [2023-11-12 00:58:21,766 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:58:21,768 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:58:21,770 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:58:21,770 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:58:21,775 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:58:21,776 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:58:21" (1/1) ... [2023-11-12 00:58:21,777 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c095cbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:21, skipping insertion in model container [2023-11-12 00:58:21,778 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:58:21" (1/1) ... [2023-11-12 00:58:21,826 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:58:22,190 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_8cd06d92-6c47-47da-9d60-41a86740bf4b/sv-benchmarks/c/list-simple/dll2n_append_unequal.i[24457,24470] [2023-11-12 00:58:22,201 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:58:22,212 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:58:22,284 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_8cd06d92-6c47-47da-9d60-41a86740bf4b/sv-benchmarks/c/list-simple/dll2n_append_unequal.i[24457,24470] [2023-11-12 00:58:22,288 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:58:22,327 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:58:22,327 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:22 WrapperNode [2023-11-12 00:58:22,327 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:58:22,329 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:58:22,329 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:58:22,329 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:58:22,337 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:22" (1/1) ... [2023-11-12 00:58:22,372 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:22" (1/1) ... [2023-11-12 00:58:22,407 INFO L138 Inliner]: procedures = 127, calls = 40, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 140 [2023-11-12 00:58:22,407 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:58:22,408 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:58:22,408 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:58:22,408 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:58:22,418 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:22" (1/1) ... [2023-11-12 00:58:22,419 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:22" (1/1) ... [2023-11-12 00:58:22,422 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:22" (1/1) ... [2023-11-12 00:58:22,423 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:22" (1/1) ... [2023-11-12 00:58:22,431 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:22" (1/1) ... [2023-11-12 00:58:22,435 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:22" (1/1) ... [2023-11-12 00:58:22,438 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:22" (1/1) ... [2023-11-12 00:58:22,439 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:22" (1/1) ... [2023-11-12 00:58:22,443 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:58:22,444 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:58:22,444 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:58:22,444 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:58:22,445 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:22" (1/1) ... [2023-11-12 00:58:22,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:58:22,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd06d92-6c47-47da-9d60-41a86740bf4b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:58:22,499 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd06d92-6c47-47da-9d60-41a86740bf4b/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:58:22,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd06d92-6c47-47da-9d60-41a86740bf4b/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:58:22,548 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:58:22,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:58:22,549 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-11-12 00:58:22,549 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-11-12 00:58:22,549 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 00:58:22,549 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:58:22,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:58:22,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 00:58:22,552 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 00:58:22,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:58:22,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-12 00:58:22,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:58:22,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:58:22,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:58:22,752 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:58:22,754 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:58:23,048 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:58:23,158 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:58:23,158 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-12 00:58:23,160 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:58:23 BoogieIcfgContainer [2023-11-12 00:58:23,161 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:58:23,164 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:58:23,164 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:58:23,168 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:58:23,168 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:58:21" (1/3) ... [2023-11-12 00:58:23,169 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ba4fe32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:58:23, skipping insertion in model container [2023-11-12 00:58:23,169 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:22" (2/3) ... [2023-11-12 00:58:23,169 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ba4fe32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:58:23, skipping insertion in model container [2023-11-12 00:58:23,170 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:58:23" (3/3) ... [2023-11-12 00:58:23,171 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2n_append_unequal.i [2023-11-12 00:58:23,192 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:58:23,192 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:58:23,237 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:58:23,243 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;@6dd0a1b7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:58:23,243 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:58:23,248 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 23 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:58:23,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-12 00:58:23,257 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:58:23,258 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:58:23,259 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:58:23,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:58:23,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1645558503, now seen corresponding path program 1 times [2023-11-12 00:58:23,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:58:23,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864799513] [2023-11-12 00:58:23,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:58:23,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:58:23,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:58:23,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:58:23,802 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:58:23,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864799513] [2023-11-12 00:58:23,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864799513] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:58:23,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:58:23,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:58:23,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136086686] [2023-11-12 00:58:23,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:58:23,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:58:23,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:58:23,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:58:23,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:58:23,842 INFO L87 Difference]: Start difference. First operand has 27 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 23 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:58:23,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:58:23,899 INFO L93 Difference]: Finished difference Result 53 states and 77 transitions. [2023-11-12 00:58:23,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:58:23,902 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-11-12 00:58:23,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:58:23,909 INFO L225 Difference]: With dead ends: 53 [2023-11-12 00:58:23,909 INFO L226 Difference]: Without dead ends: 26 [2023-11-12 00:58:23,912 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 00:58:23,916 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 1 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:58:23,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 58 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:58:23,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-12 00:58:23,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2023-11-12 00:58:23,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:58:23,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2023-11-12 00:58:23,955 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 12 [2023-11-12 00:58:23,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:58:23,956 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2023-11-12 00:58:23,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:58:23,956 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2023-11-12 00:58:23,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-12 00:58:23,957 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:58:23,958 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:58:23,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:58:23,958 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:58:23,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:58:23,959 INFO L85 PathProgramCache]: Analyzing trace with hash 915268386, now seen corresponding path program 1 times [2023-11-12 00:58:23,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:58:23,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037095750] [2023-11-12 00:58:23,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:58:23,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:58:24,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:58:24,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 00:58:24,247 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:58:24,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037095750] [2023-11-12 00:58:24,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037095750] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:58:24,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466327601] [2023-11-12 00:58:24,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:58:24,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:58:24,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd06d92-6c47-47da-9d60-41a86740bf4b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:58:24,256 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd06d92-6c47-47da-9d60-41a86740bf4b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:58:24,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd06d92-6c47-47da-9d60-41a86740bf4b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:58:24,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:58:24,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 00:58:24,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:58:24,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:58:24,559 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:58:24,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 00:58:24,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466327601] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:58:24,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [358926390] [2023-11-12 00:58:24,635 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-12 00:58:24,635 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:58:24,639 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:58:24,644 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:58:24,646 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:58:28,648 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 193 for LOIs [2023-11-12 00:58:29,021 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:59:12,267 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '238#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~uneq~0#1| 5) (= |ULTIMATE.start_main_~count~0#1| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) 0) |ULTIMATE.start_main_~ptr~0#1.offset|) (exists ((|v_#memory_$Pointer$.offset_72| (Array Int (Array Int Int))) (|v_ULTIMATE.start_dll_append_#in~head#1.base_9| Int) (|v_ULTIMATE.start_dll_append_~head#1.base_13| Int) (|v_#memory_$Pointer$.base_72| (Array Int (Array Int Int))) (|v_#memory_int_81| (Array Int (Array Int Int)))) (and (= (select (select |v_#memory_$Pointer$.offset_72| |v_ULTIMATE.start_dll_append_~head#1.base_13|) 0) 0) (<= 2 |v_ULTIMATE.start_dll_append_~head#1.base_13|) (<= 2 |v_ULTIMATE.start_dll_append_#in~head#1.base_9|) (= |#memory_int| (store |v_#memory_int_81| |v_ULTIMATE.start_dll_append_~head#1.base_13| (store (select |v_#memory_int_81| |v_ULTIMATE.start_dll_append_~head#1.base_13|) 0 (select (select |#memory_int| |v_ULTIMATE.start_dll_append_~head#1.base_13|) 0)))) (or (and (exists ((|v_#memory_$Pointer$.offset_68| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.offset_68| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_~head#1.base_13|) 0) (store (store (store (select |v_#memory_$Pointer$.offset_68| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_~head#1.base_13|) 0)) 4 0) 8 0) 0 (select (select |v_#memory_$Pointer$.offset_72| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_~head#1.base_13|) 0)) 0))) |v_#memory_$Pointer$.offset_72|)) (<= (+ (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_~head#1.base_13|) 0) 1) |#StackHeapBarrier|) (exists ((|v_#valid_33| (Array Int Int))) (and (= (store |v_#valid_33| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_~head#1.base_13|) 0) 1) |#valid|) (= (select |v_#valid_33| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_~head#1.base_13|) 0)) 0))) (= |ULTIMATE.start_main_~#s~0#1.base| |v_ULTIMATE.start_dll_append_#in~head#1.base_9|) (exists ((|v_#memory_$Pointer$.base_68| (Array Int (Array Int Int)))) (= |v_#memory_$Pointer$.base_72| (store |v_#memory_$Pointer$.base_68| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_~head#1.base_13|) 0) (store (store (store (select |v_#memory_$Pointer$.base_68| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_~head#1.base_13|) 0)) 4 0) 8 0) 0 (select (select |v_#memory_$Pointer$.base_72| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_~head#1.base_13|) 0)) 0))))) (exists ((|v_#memory_int_51| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_50| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_71| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_50| (Array Int (Array Int Int))) (|v_ULTIMATE.start_dll_create_~head~0#1.base_28| Int) (|v_old(#memory_int)_AFTER_CALL_9| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.offset)_AFTER_CALL_9| (Array Int (Array Int Int))) (|v_#memory_int_80| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.base)_AFTER_CALL_9| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_71| (Array Int (Array Int Int)))) (and (= (select (select |v_old(#memory_$Pointer$.offset)_AFTER_CALL_9| |ULTIMATE.start_main_~#s~0#1.base|) 0) 0) (= (store |v_#memory_$Pointer$.base_71| |ULTIMATE.start_dll_create_#res#1.base| (store (select |v_#memory_$Pointer$.base_71| |ULTIMATE.start_dll_create_#res#1.base|) 0 (select (select |v_#memory_$Pointer$.base_50| |ULTIMATE.start_dll_create_#res#1.base|) 0))) |v_#memory_$Pointer$.base_50|) (or (and (= |v_old(#memory_int)_AFTER_CALL_9| (store |v_#memory_int_51| |v_ULTIMATE.start_dll_create_~head~0#1.base_28| (store (select |v_#memory_int_51| |v_ULTIMATE.start_dll_create_~head~0#1.base_28|) 8 (select (select |v_old(#memory_int)_AFTER_CALL_9| |v_ULTIMATE.start_dll_create_~head~0#1.base_28|) 8)))) (not (= 0 |v_ULTIMATE.start_dll_create_~head~0#1.base_28|)) (= |v_old(#memory_$Pointer$.base)_AFTER_CALL_9| (store (store |v_#memory_$Pointer$.base_50| |ULTIMATE.start_dll_create_#res#1.base| (store (select |v_#memory_$Pointer$.base_50| |ULTIMATE.start_dll_create_#res#1.base|) 4 |v_ULTIMATE.start_dll_create_~head~0#1.base_28|)) |v_ULTIMATE.start_dll_create_~head~0#1.base_28| (store (select (store |v_#memory_$Pointer$.base_50| |ULTIMATE.start_dll_create_#res#1.base| (store (select |v_#memory_$Pointer$.base_50| |ULTIMATE.start_dll_create_#res#1.base|) 4 |v_ULTIMATE.start_dll_create_~head~0#1.base_28|)) |v_ULTIMATE.start_dll_create_~head~0#1.base_28|) 8 |ULTIMATE.start_dll_create_#res#1.base|))) (= |v_old(#memory_$Pointer$.offset)_AFTER_CALL_9| (store (store |v_#memory_$Pointer$.offset_50| |ULTIMATE.start_dll_create_#res#1.base| (store (select |v_#memory_$Pointer$.offset_50| |ULTIMATE.start_dll_create_#res#1.base|) 4 0)) |v_ULTIMATE.start_dll_create_~head~0#1.base_28| (store (select (store |v_#memory_$Pointer$.offset_50| |ULTIMATE.start_dll_create_#res#1.base| (store (select |v_#memory_$Pointer$.offset_50| |ULTIMATE.start_dll_create_#res#1.base|) 4 0)) |v_ULTIMATE.start_dll_create_~head~0#1.base_28|) 8 0)))) (and (= |v_#memory_int_51| |v_old(#memory_int)_AFTER_CALL_9|) (= 0 |v_ULTIMATE.start_dll_create_~head~0#1.base_28|) (= |v_old(#memory_$Pointer$.base)_AFTER_CALL_9| (store |v_#memory_$Pointer$.base_50| |ULTIMATE.start_dll_create_#res#1.base| (store (select |v_#memory_$Pointer$.base_50| |ULTIMATE.start_dll_create_#res#1.base|) 4 0))) (= |v_old(#memory_$Pointer$.offset)_AFTER_CALL_9| (store |v_#memory_$Pointer$.offset_50| |ULTIMATE.start_dll_create_#res#1.base| (store (select |v_#memory_$Pointer$.offset_50| |ULTIMATE.start_dll_create_#res#1.base|) 4 0))))) (= |ULTIMATE.start_dll_create_#res#1.base| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_9| |ULTIMATE.start_main_~#s~0#1.base|) 0)) (= (store |v_#memory_$Pointer$.offset_71| |ULTIMATE.start_dll_create_#res#1.base| (store (select |v_#memory_$Pointer$.offset_71| |ULTIMATE.start_dll_create_#res#1.base|) 0 (select (select |v_#memory_$Pointer$.offset_50| |ULTIMATE.start_dll_create_#res#1.base|) 0))) |v_#memory_$Pointer$.offset_50|) (= (store |v_#memory_int_80| |ULTIMATE.start_dll_create_#res#1.base| (store (store (select |v_#memory_int_80| |ULTIMATE.start_dll_create_#res#1.base|) 0 1) 4 (select (select |v_#memory_int_51| |ULTIMATE.start_dll_create_#res#1.base|) 4))) |v_#memory_int_51|))) (exists ((|v_#length_23| (Array Int Int))) (= |#length| (store |v_#length_23| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_~head#1.base_13|) 0) 12))) (= |v_ULTIMATE.start_dll_append_~head#1.base_13| |v_ULTIMATE.start_dll_append_#in~head#1.base_9|) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_~head#1.base_13|) 0) 0)) (exists ((|v_#memory_int_77| (Array Int (Array Int Int))) (|v_#memory_int_37| (Array Int (Array Int Int))) (|v_#memory_int_38| (Array Int (Array Int Int)))) (and (= |v_#memory_int_81| (store |v_#memory_int_37| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_~head#1.base_13|) 0) (store (select |v_#memory_int_37| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_~head#1.base_13|) 0)) 0 5))) (= (store |v_#memory_int_77| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_~head#1.base_13|) 0) (store (select |v_#memory_int_77| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_~head#1.base_13|) 0)) 4 (select (select |v_#memory_int_38| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_~head#1.base_13|) 0)) 4))) |v_#memory_int_38|) (= (store |v_#memory_int_38| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_~head#1.base_13|) 0) (store (select |v_#memory_int_38| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_~head#1.base_13|) 0)) 8 (select (select |v_#memory_int_37| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_~head#1.base_13|) 0)) 8))) |v_#memory_int_37|)))) (and (exists ((|v_#memory_$Pointer$.offset_68| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.offset_68| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_~head#1.base_13|) 0) (store (store (store (select |v_#memory_$Pointer$.offset_68| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_~head#1.base_13|) 0)) 4 0) 8 0) 0 (select (select |v_#memory_$Pointer$.offset_72| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_~head#1.base_13|) 0)) 0))) |v_#memory_$Pointer$.offset_72|)) (<= (+ (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_~head#1.base_13|) 0) 1) |#StackHeapBarrier|) (exists ((|v_#valid_33| (Array Int Int))) (and (= (store |v_#valid_33| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_~head#1.base_13|) 0) 1) |#valid|) (= (select |v_#valid_33| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_~head#1.base_13|) 0)) 0))) (= |ULTIMATE.start_main_~#s~0#1.base| |v_ULTIMATE.start_dll_append_#in~head#1.base_9|) (exists ((|v_#memory_$Pointer$.base_68| (Array Int (Array Int Int)))) (= |v_#memory_$Pointer$.base_72| (store |v_#memory_$Pointer$.base_68| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_~head#1.base_13|) 0) (store (store (store (select |v_#memory_$Pointer$.base_68| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_~head#1.base_13|) 0)) 4 0) 8 0) 0 (select (select |v_#memory_$Pointer$.base_72| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_~head#1.base_13|) 0)) 0))))) (exists ((|v_#length_23| (Array Int Int))) (= |#length| (store |v_#length_23| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_~head#1.base_13|) 0) 12))) (= |v_ULTIMATE.start_dll_append_~head#1.base_13| |v_ULTIMATE.start_dll_append_#in~head#1.base_9|) (exists ((|v_#memory_int_51| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_50| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.base)_AFTER_CALL_10| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_71| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.offset)_AFTER_CALL_10| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_50| (Array Int (Array Int Int))) (|v_ULTIMATE.start_dll_create_~head~0#1.base_28| Int) (|v_#memory_int_80| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_71| (Array Int (Array Int Int))) (|v_old(#memory_int)_AFTER_CALL_10| (Array Int (Array Int Int)))) (and (= (store |v_#memory_$Pointer$.base_71| |ULTIMATE.start_dll_create_#res#1.base| (store (select |v_#memory_$Pointer$.base_71| |ULTIMATE.start_dll_create_#res#1.base|) 0 (select (select |v_#memory_$Pointer$.base_50| |ULTIMATE.start_dll_create_#res#1.base|) 0))) |v_#memory_$Pointer$.base_50|) (= (select (select |v_old(#memory_$Pointer$.offset)_AFTER_CALL_10| |ULTIMATE.start_main_~#s~0#1.base|) 0) 0) (or (and (= |v_old(#memory_$Pointer$.offset)_AFTER_CALL_10| (store (store |v_#memory_$Pointer$.offset_50| |ULTIMATE.start_dll_create_#res#1.base| (store (select |v_#memory_$Pointer$.offset_50| |ULTIMATE.start_dll_create_#res#1.base|) 4 0)) |v_ULTIMATE.start_dll_create_~head~0#1.base_28| (store (select (store |v_#memory_$Pointer$.offset_50| |ULTIMATE.start_dll_create_#res#1.base| (store (select |v_#memory_$Pointer$.offset_50| |ULTIMATE.start_dll_create_#res#1.base|) 4 0)) |v_ULTIMATE.start_dll_create_~head~0#1.base_28|) 8 0))) (not (= 0 |v_ULTIMATE.start_dll_create_~head~0#1.base_28|)) (= |v_old(#memory_int)_AFTER_CALL_10| (store |v_#memory_int_51| |v_ULTIMATE.start_dll_create_~head~0#1.base_28| (store (select |v_#memory_int_51| |v_ULTIMATE.start_dll_create_~head~0#1.base_28|) 8 (select (select |v_old(#memory_int)_AFTER_CALL_10| |v_ULTIMATE.start_dll_create_~head~0#1.base_28|) 8)))) (= (store (store |v_#memory_$Pointer$.base_50| |ULTIMATE.start_dll_create_#res#1.base| (store (select |v_#memory_$Pointer$.base_50| |ULTIMATE.start_dll_create_#res#1.base|) 4 |v_ULTIMATE.start_dll_create_~head~0#1.base_28|)) |v_ULTIMATE.start_dll_create_~head~0#1.base_28| (store (select (store |v_#memory_$Pointer$.base_50| |ULTIMATE.start_dll_create_#res#1.base| (store (select |v_#memory_$Pointer$.base_50| |ULTIMATE.start_dll_create_#res#1.base|) 4 |v_ULTIMATE.start_dll_create_~head~0#1.base_28|)) |v_ULTIMATE.start_dll_create_~head~0#1.base_28|) 8 |ULTIMATE.start_dll_create_#res#1.base|)) |v_old(#memory_$Pointer$.base)_AFTER_CALL_10|)) (and (= 0 |v_ULTIMATE.start_dll_create_~head~0#1.base_28|) (= (store |v_#memory_$Pointer$.base_50| |ULTIMATE.start_dll_create_#res#1.base| (store (select |v_#memory_$Pointer$.base_50| |ULTIMATE.start_dll_create_#res#1.base|) 4 0)) |v_old(#memory_$Pointer$.base)_AFTER_CALL_10|) (= |v_old(#memory_int)_AFTER_CALL_10| |v_#memory_int_51|) (= |v_old(#memory_$Pointer$.offset)_AFTER_CALL_10| (store |v_#memory_$Pointer$.offset_50| |ULTIMATE.start_dll_create_#res#1.base| (store (select |v_#memory_$Pointer$.offset_50| |ULTIMATE.start_dll_create_#res#1.base|) 4 0))))) (= (store |v_#memory_$Pointer$.offset_71| |ULTIMATE.start_dll_create_#res#1.base| (store (select |v_#memory_$Pointer$.offset_71| |ULTIMATE.start_dll_create_#res#1.base|) 0 (select (select |v_#memory_$Pointer$.offset_50| |ULTIMATE.start_dll_create_#res#1.base|) 0))) |v_#memory_$Pointer$.offset_50|) (= |ULTIMATE.start_dll_create_#res#1.base| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_10| |ULTIMATE.start_main_~#s~0#1.base|) 0)) (= (store |v_#memory_int_80| |ULTIMATE.start_dll_create_#res#1.base| (store (store (select |v_#memory_int_80| |ULTIMATE.start_dll_create_#res#1.base|) 0 1) 4 (select (select |v_#memory_int_51| |ULTIMATE.start_dll_create_#res#1.base|) 4))) |v_#memory_int_51|))) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_~head#1.base_13|) 0) 0)) (exists ((|v_#memory_int_77| (Array Int (Array Int Int))) (|v_#memory_int_37| (Array Int (Array Int Int))) (|v_#memory_int_38| (Array Int (Array Int Int)))) (and (= |v_#memory_int_81| (store |v_#memory_int_37| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_~head#1.base_13|) 0) (store (select |v_#memory_int_37| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_~head#1.base_13|) 0)) 0 5))) (= (store |v_#memory_int_77| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_~head#1.base_13|) 0) (store (select |v_#memory_int_77| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_~head#1.base_13|) 0)) 4 (select (select |v_#memory_int_38| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_~head#1.base_13|) 0)) 4))) |v_#memory_int_38|) (= (store |v_#memory_int_38| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_~head#1.base_13|) 0) (store (select |v_#memory_int_38| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_~head#1.base_13|) 0)) 8 (select (select |v_#memory_int_37| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_~head#1.base_13|) 0)) 8))) |v_#memory_int_37|))))) (= (select (select |v_#memory_$Pointer$.base_72| |v_ULTIMATE.start_dll_append_~head#1.base_13|) 0) 0) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_72| |v_ULTIMATE.start_dll_append_~head#1.base_13| (store (select |v_#memory_$Pointer$.offset_72| |v_ULTIMATE.start_dll_append_~head#1.base_13|) 0 0))) (= (store |v_#memory_$Pointer$.base_72| |v_ULTIMATE.start_dll_append_~head#1.base_13| (store (select |v_#memory_$Pointer$.base_72| |v_ULTIMATE.start_dll_append_~head#1.base_13|) 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_~head#1.base_13|) 0))) |#memory_$Pointer$.base|))) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_dll_create_#res#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) 0) |ULTIMATE.start_main_~ptr~0#1.base|) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4)) 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4)) 0))' at error location [2023-11-12 00:59:12,268 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:59:12,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:59:12,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-11-12 00:59:12,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738989372] [2023-11-12 00:59:12,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:59:12,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:59:12,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:12,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:59:12,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=231, Unknown=5, NotChecked=0, Total=272 [2023-11-12 00:59:12,273 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-12 00:59:12,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:12,328 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2023-11-12 00:59:12,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:59:12,329 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 18 [2023-11-12 00:59:12,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:12,330 INFO L225 Difference]: With dead ends: 46 [2023-11-12 00:59:12,330 INFO L226 Difference]: Without dead ends: 27 [2023-11-12 00:59:12,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 43.3s TimeCoverageRelationStatistics Valid=36, Invalid=231, Unknown=5, NotChecked=0, Total=272 [2023-11-12 00:59:12,333 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:12,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 73 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:59:12,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-12 00:59:12,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-11-12 00:59:12,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 00:59:12,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2023-11-12 00:59:12,340 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 18 [2023-11-12 00:59:12,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:12,341 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2023-11-12 00:59:12,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-12 00:59:12,343 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2023-11-12 00:59:12,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-12 00:59:12,344 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:12,344 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:12,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd06d92-6c47-47da-9d60-41a86740bf4b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:59:12,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd06d92-6c47-47da-9d60-41a86740bf4b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:12,550 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:12,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:12,550 INFO L85 PathProgramCache]: Analyzing trace with hash 418919197, now seen corresponding path program 2 times [2023-11-12 00:59:12,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:12,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795352775] [2023-11-12 00:59:12,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:12,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:12,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:13,189 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 00:59:13,189 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:13,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795352775] [2023-11-12 00:59:13,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795352775] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:59:13,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135443510] [2023-11-12 00:59:13,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:59:13,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:13,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd06d92-6c47-47da-9d60-41a86740bf4b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:13,193 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd06d92-6c47-47da-9d60-41a86740bf4b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:59:13,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd06d92-6c47-47da-9d60-41a86740bf4b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:59:13,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 00:59:13,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:59:13,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-12 00:59:13,385 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:59:13,604 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 00:59:13,636 WARN L876 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$.base| |node_create_~temp~0#1.base|))))) is different from true [2023-11-12 00:59:13,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:59:13,653 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 00:59:13,684 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 00:59:13,706 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-11-12 00:59:13,707 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:59:13,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135443510] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:59:13,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1695681759] [2023-11-12 00:59:13,827 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-12 00:59:13,827 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:59:13,827 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:59:13,827 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:59:13,828 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:59:17,326 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 183 for LOIs [2023-11-12 00:59:17,605 INFO L180 IcfgInterpreter]: Interpretation finished