./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2n_append_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adfe3e54-d845-4eca-a870-ef5dadabf808/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adfe3e54-d845-4eca-a870-ef5dadabf808/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adfe3e54-d845-4eca-a870-ef5dadabf808/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adfe3e54-d845-4eca-a870-ef5dadabf808/bin/utaipan-verify-DbMuA5NWw2/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2n_append_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adfe3e54-d845-4eca-a870-ef5dadabf808/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adfe3e54-d845-4eca-a870-ef5dadabf808/bin/utaipan-verify-DbMuA5NWw2 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 742ffe63db70127807dbc7584eb0c51633a9ed1be5f19fa1a247e43392d52dab --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 11:24:07,148 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 11:24:07,246 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adfe3e54-d845-4eca-a870-ef5dadabf808/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-02 11:24:07,253 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 11:24:07,256 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 11:24:07,294 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 11:24:07,295 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 11:24:07,295 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 11:24:07,296 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 11:24:07,298 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 11:24:07,298 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 11:24:07,299 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 11:24:07,299 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 11:24:07,300 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 11:24:07,300 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 11:24:07,300 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 11:24:07,301 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 11:24:07,301 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 11:24:07,304 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 11:24:07,305 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 11:24:07,308 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 11:24:07,309 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 11:24:07,309 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-02 11:24:07,310 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-02 11:24:07,310 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 11:24:07,310 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 11:24:07,311 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 11:24:07,311 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 11:24:07,311 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 11:24:07,312 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-02 11:24:07,326 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-02 11:24:07,327 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-02 11:24:07,328 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 11:24:07,328 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-02 11:24:07,329 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 11:24:07,329 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-02 11:24:07,330 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 11:24:07,330 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 11:24:07,330 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 11:24:07,331 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 11:24:07,331 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 11:24:07,331 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 11:24:07,332 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 11:24:07,332 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 11:24:07,333 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 11:24:07,333 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 11:24:07,333 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 11:24:07,334 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 11:24:07,335 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 11:24:07,335 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_adfe3e54-d845-4eca-a870-ef5dadabf808/bin/utaipan-verify-DbMuA5NWw2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adfe3e54-d845-4eca-a870-ef5dadabf808/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 742ffe63db70127807dbc7584eb0c51633a9ed1be5f19fa1a247e43392d52dab [2024-11-02 11:24:07,654 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 11:24:07,687 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 11:24:07,691 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 11:24:07,692 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 11:24:07,693 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 11:24:07,695 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adfe3e54-d845-4eca-a870-ef5dadabf808/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/list-simple/sll2n_append_unequal.i Unable to find full path for "g++" [2024-11-02 11:24:09,856 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 11:24:10,115 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 11:24:10,118 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adfe3e54-d845-4eca-a870-ef5dadabf808/sv-benchmarks/c/list-simple/sll2n_append_unequal.i [2024-11-02 11:24:10,133 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adfe3e54-d845-4eca-a870-ef5dadabf808/bin/utaipan-verify-DbMuA5NWw2/data/ffc845cdc/93317a3dc4da41f5b5127fa573ad4a17/FLAGabc723cf3 [2024-11-02 11:24:10,439 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adfe3e54-d845-4eca-a870-ef5dadabf808/bin/utaipan-verify-DbMuA5NWw2/data/ffc845cdc/93317a3dc4da41f5b5127fa573ad4a17 [2024-11-02 11:24:10,442 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 11:24:10,446 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 11:24:10,447 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 11:24:10,447 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 11:24:10,454 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 11:24:10,456 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:24:10" (1/1) ... [2024-11-02 11:24:10,457 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c0ef2c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:24:10, skipping insertion in model container [2024-11-02 11:24:10,457 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:24:10" (1/1) ... [2024-11-02 11:24:10,504 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 11:24:10,916 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 11:24:10,930 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 11:24:11,005 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 11:24:11,045 INFO L204 MainTranslator]: Completed translation [2024-11-02 11:24:11,046 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:24:11 WrapperNode [2024-11-02 11:24:11,046 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 11:24:11,048 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 11:24:11,048 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 11:24:11,048 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 11:24:11,057 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:24:11" (1/1) ... [2024-11-02 11:24:11,080 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:24:11" (1/1) ... [2024-11-02 11:24:11,120 INFO L138 Inliner]: procedures = 127, calls = 37, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 142 [2024-11-02 11:24:11,123 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 11:24:11,123 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 11:24:11,124 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 11:24:11,124 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 11:24:11,136 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:24:11" (1/1) ... [2024-11-02 11:24:11,136 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:24:11" (1/1) ... [2024-11-02 11:24:11,143 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:24:11" (1/1) ... [2024-11-02 11:24:11,143 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:24:11" (1/1) ... [2024-11-02 11:24:11,156 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:24:11" (1/1) ... [2024-11-02 11:24:11,164 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:24:11" (1/1) ... [2024-11-02 11:24:11,167 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:24:11" (1/1) ... [2024-11-02 11:24:11,169 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:24:11" (1/1) ... [2024-11-02 11:24:11,176 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 11:24:11,177 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 11:24:11,177 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 11:24:11,178 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 11:24:11,179 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:24:11" (1/1) ... [2024-11-02 11:24:11,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 11:24:11,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adfe3e54-d845-4eca-a870-ef5dadabf808/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:24:11,215 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adfe3e54-d845-4eca-a870-ef5dadabf808/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 11:24:11,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adfe3e54-d845-4eca-a870-ef5dadabf808/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 11:24:11,254 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-02 11:24:11,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-02 11:24:11,255 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2024-11-02 11:24:11,255 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2024-11-02 11:24:11,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-02 11:24:11,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 11:24:11,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-02 11:24:11,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-02 11:24:11,257 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-02 11:24:11,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-02 11:24:11,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2024-11-02 11:24:11,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 11:24:11,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 11:24:11,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 11:24:11,378 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 11:24:11,381 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 11:24:11,883 INFO L? ?]: Removed 108 outVars from TransFormulas that were not future-live. [2024-11-02 11:24:11,883 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 11:24:11,978 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 11:24:11,978 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-02 11:24:11,982 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:24:11 BoogieIcfgContainer [2024-11-02 11:24:11,983 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 11:24:11,985 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 11:24:11,986 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 11:24:11,989 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 11:24:11,993 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:24:10" (1/3) ... [2024-11-02 11:24:11,994 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34c73808 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:24:11, skipping insertion in model container [2024-11-02 11:24:11,994 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:24:11" (2/3) ... [2024-11-02 11:24:11,994 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34c73808 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:24:11, skipping insertion in model container [2024-11-02 11:24:11,995 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:24:11" (3/3) ... [2024-11-02 11:24:11,997 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2n_append_unequal.i [2024-11-02 11:24:12,017 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 11:24:12,017 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 39 error locations. [2024-11-02 11:24:12,063 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 11:24:12,069 INFO L333 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, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@5e08c89d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 11:24:12,070 INFO L334 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2024-11-02 11:24:12,073 INFO L276 IsEmpty]: Start isEmpty. Operand has 84 states, 41 states have (on average 2.268292682926829) internal successors, (93), 80 states have internal predecessors, (93), 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) [2024-11-02 11:24:12,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-02 11:24:12,081 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:24:12,081 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-02 11:24:12,082 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-02 11:24:12,087 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:24:12,087 INFO L85 PathProgramCache]: Analyzing trace with hash -2129893091, now seen corresponding path program 1 times [2024-11-02 11:24:12,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:24:12,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226264657] [2024-11-02 11:24:12,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:24:12,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:24:12,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:24:12,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:24:12,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:24:12,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226264657] [2024-11-02 11:24:12,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226264657] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:24:12,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:24:12,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 11:24:12,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570723040] [2024-11-02 11:24:12,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:24:12,426 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:24:12,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:24:12,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:24:12,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:24:12,473 INFO L87 Difference]: Start difference. First operand has 84 states, 41 states have (on average 2.268292682926829) internal successors, (93), 80 states have internal predecessors, (93), 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 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:24:12,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:24:12,577 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2024-11-02 11:24:12,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:24:12,580 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-02 11:24:12,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:24:12,589 INFO L225 Difference]: With dead ends: 89 [2024-11-02 11:24:12,589 INFO L226 Difference]: Without dead ends: 87 [2024-11-02 11:24:12,591 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:24:12,597 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 4 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:24:12,598 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 156 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:24:12,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-02 11:24:12,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 82. [2024-11-02 11:24:12,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 40 states have (on average 2.15) internal successors, (86), 78 states have internal predecessors, (86), 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) [2024-11-02 11:24:12,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2024-11-02 11:24:12,649 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 6 [2024-11-02 11:24:12,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:24:12,650 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2024-11-02 11:24:12,650 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:24:12,650 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2024-11-02 11:24:12,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-02 11:24:12,651 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:24:12,651 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-02 11:24:12,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 11:24:12,651 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-02 11:24:12,652 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:24:12,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1989545633, now seen corresponding path program 1 times [2024-11-02 11:24:12,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:24:12,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790370818] [2024-11-02 11:24:12,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:24:12,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:24:12,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:24:12,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:24:12,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:24:12,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790370818] [2024-11-02 11:24:12,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790370818] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:24:12,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:24:12,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 11:24:12,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309233388] [2024-11-02 11:24:12,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:24:12,828 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:24:12,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:24:12,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:24:12,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:24:12,832 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:24:12,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:24:12,987 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2024-11-02 11:24:12,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:24:12,988 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-02 11:24:12,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:24:12,989 INFO L225 Difference]: With dead ends: 80 [2024-11-02 11:24:12,990 INFO L226 Difference]: Without dead ends: 80 [2024-11-02 11:24:12,990 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:24:12,991 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 1 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:24:12,994 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 116 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:24:12,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-11-02 11:24:13,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2024-11-02 11:24:13,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 40 states have (on average 2.1) internal successors, (84), 76 states have internal predecessors, (84), 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) [2024-11-02 11:24:13,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2024-11-02 11:24:13,009 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 6 [2024-11-02 11:24:13,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:24:13,010 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2024-11-02 11:24:13,010 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:24:13,010 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2024-11-02 11:24:13,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-02 11:24:13,011 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:24:13,011 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-02 11:24:13,011 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 11:24:13,012 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-02 11:24:13,012 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:24:13,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1989545634, now seen corresponding path program 1 times [2024-11-02 11:24:13,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:24:13,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507254547] [2024-11-02 11:24:13,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:24:13,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:24:13,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:24:13,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:24:13,241 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:24:13,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507254547] [2024-11-02 11:24:13,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507254547] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:24:13,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:24:13,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 11:24:13,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357528002] [2024-11-02 11:24:13,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:24:13,243 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:24:13,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:24:13,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:24:13,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:24:13,244 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:24:13,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:24:13,366 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2024-11-02 11:24:13,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:24:13,368 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-02 11:24:13,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:24:13,369 INFO L225 Difference]: With dead ends: 78 [2024-11-02 11:24:13,369 INFO L226 Difference]: Without dead ends: 78 [2024-11-02 11:24:13,369 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:24:13,371 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 1 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:24:13,371 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 119 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:24:13,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-02 11:24:13,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-11-02 11:24:13,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 40 states have (on average 2.05) internal successors, (82), 74 states have internal predecessors, (82), 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) [2024-11-02 11:24:13,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2024-11-02 11:24:13,385 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 6 [2024-11-02 11:24:13,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:24:13,385 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2024-11-02 11:24:13,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:24:13,386 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2024-11-02 11:24:13,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-02 11:24:13,386 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:24:13,387 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:24:13,387 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 11:24:13,388 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-02 11:24:13,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:24:13,389 INFO L85 PathProgramCache]: Analyzing trace with hash 168393874, now seen corresponding path program 1 times [2024-11-02 11:24:13,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:24:13,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096100207] [2024-11-02 11:24:13,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:24:13,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:24:13,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:24:13,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:24:13,565 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:24:13,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096100207] [2024-11-02 11:24:13,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096100207] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:24:13,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:24:13,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-02 11:24:13,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435802988] [2024-11-02 11:24:13,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:24:13,567 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-02 11:24:13,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:24:13,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-02 11:24:13,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-02 11:24:13,569 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand has 6 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 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) [2024-11-02 11:24:13,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:24:13,795 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2024-11-02 11:24:13,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-02 11:24:13,796 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 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 10 [2024-11-02 11:24:13,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:24:13,797 INFO L225 Difference]: With dead ends: 77 [2024-11-02 11:24:13,798 INFO L226 Difference]: Without dead ends: 77 [2024-11-02 11:24:13,798 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-02 11:24:13,800 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 1 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 11:24:13,801 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 232 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 11:24:13,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-02 11:24:13,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2024-11-02 11:24:13,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 40 states have (on average 2.025) internal successors, (81), 73 states have internal predecessors, (81), 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) [2024-11-02 11:24:13,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2024-11-02 11:24:13,808 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 10 [2024-11-02 11:24:13,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:24:13,808 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2024-11-02 11:24:13,809 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 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) [2024-11-02 11:24:13,809 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2024-11-02 11:24:13,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-02 11:24:13,810 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:24:13,810 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:24:13,810 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-02 11:24:13,810 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-02 11:24:13,811 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:24:13,811 INFO L85 PathProgramCache]: Analyzing trace with hash 168393875, now seen corresponding path program 1 times [2024-11-02 11:24:13,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:24:13,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308285948] [2024-11-02 11:24:13,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:24:13,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:24:13,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:24:14,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:24:14,053 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:24:14,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308285948] [2024-11-02 11:24:14,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308285948] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:24:14,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:24:14,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-02 11:24:14,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122232195] [2024-11-02 11:24:14,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:24:14,055 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-02 11:24:14,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:24:14,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-02 11:24:14,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-02 11:24:14,058 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 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) [2024-11-02 11:24:14,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:24:14,270 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2024-11-02 11:24:14,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-02 11:24:14,271 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 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 10 [2024-11-02 11:24:14,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:24:14,273 INFO L225 Difference]: With dead ends: 76 [2024-11-02 11:24:14,275 INFO L226 Difference]: Without dead ends: 76 [2024-11-02 11:24:14,275 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-02 11:24:14,276 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 1 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 11:24:14,277 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 311 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 11:24:14,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-02 11:24:14,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2024-11-02 11:24:14,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 40 states have (on average 2.0) internal successors, (80), 72 states have internal predecessors, (80), 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) [2024-11-02 11:24:14,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 84 transitions. [2024-11-02 11:24:14,289 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 84 transitions. Word has length 10 [2024-11-02 11:24:14,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:24:14,289 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 84 transitions. [2024-11-02 11:24:14,289 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 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) [2024-11-02 11:24:14,290 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 84 transitions. [2024-11-02 11:24:14,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-02 11:24:14,290 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:24:14,293 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:24:14,293 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-02 11:24:14,293 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-02 11:24:14,294 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:24:14,294 INFO L85 PathProgramCache]: Analyzing trace with hash -644371449, now seen corresponding path program 1 times [2024-11-02 11:24:14,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:24:14,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149057482] [2024-11-02 11:24:14,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:24:14,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:24:14,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:24:14,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-02 11:24:14,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:24:14,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149057482] [2024-11-02 11:24:14,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149057482] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:24:14,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163790487] [2024-11-02 11:24:14,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:24:14,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:24:14,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adfe3e54-d845-4eca-a870-ef5dadabf808/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:24:14,410 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adfe3e54-d845-4eca-a870-ef5dadabf808/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:24:14,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adfe3e54-d845-4eca-a870-ef5dadabf808/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 11:24:14,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:24:14,537 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-02 11:24:14,542 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:24:14,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:24:14,587 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 11:24:14,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-02 11:24:14,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163790487] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 11:24:14,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1559100451] [2024-11-02 11:24:14,648 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-02 11:24:14,648 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 11:24:14,655 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 11:24:14,661 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 11:24:14,662 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 11:24:16,644 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 138 for LOIs [2024-11-02 11:24:17,142 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 11:24:26,013 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1014#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~uneq~0#1| 5) (= |ULTIMATE.start_sll_append_~head#1.offset| 0) (= |ULTIMATE.start_sll_append_~data#1| 5) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_sll_append_~new_last~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|) (exists ((|v_ULTIMATE.start_sll_append_~head#1.base_22| Int)) (and (not (= (select |#valid| |v_ULTIMATE.start_sll_append_~head#1.base_22|) 1)) (or (and (exists ((|v_#memory_int_43| (Array Int (Array Int Int))) (|v_#memory_int_44| (Array Int (Array Int Int)))) (and (= (store |v_#memory_int_43| |ULTIMATE.start_sll_append_~new_last~0#1.base| (store (select |v_#memory_int_43| |ULTIMATE.start_sll_append_~new_last~0#1.base|) 4 (select (select |v_#memory_int_44| |ULTIMATE.start_sll_append_~new_last~0#1.base|) 4))) |v_#memory_int_44|) (= |#memory_int| (store |v_#memory_int_44| |ULTIMATE.start_sll_append_~new_last~0#1.base| (store (select |v_#memory_int_44| |ULTIMATE.start_sll_append_~new_last~0#1.base|) 0 5))))) (exists ((|v_#length_BEFORE_CALL_17| (Array Int Int)) (|v_old(#memory_$Pointer$.base)_AFTER_CALL_10| (Array Int (Array Int Int))) (|v_old(#valid)_AFTER_CALL_10| (Array Int Int)) (|v_#memory_int_47| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_69| (Array Int (Array Int Int))) (|v_old(#memory_int)_AFTER_CALL_10| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_69| (Array Int (Array Int Int)))) (and (= (select (select |v_#memory_$Pointer$.offset_69| |ULTIMATE.start_main_~#s~0#1.base|) 0) 0) (= |v_old(#memory_int)_AFTER_CALL_10| (store |v_#memory_int_47| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_10| |ULTIMATE.start_main_~#s~0#1.base|) 0) (store (select |v_#memory_int_47| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_10| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4 (select (select |v_old(#memory_int)_AFTER_CALL_10| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_10| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4)))) (= |v_old(#memory_$Pointer$.base)_AFTER_CALL_10| (store |v_#memory_$Pointer$.base_69| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_10| |ULTIMATE.start_main_~#s~0#1.base|) 0) (store (select |v_#memory_$Pointer$.base_69| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_10| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4 (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_10| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_10| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4)))) (<= 8 (select |v_#length_BEFORE_CALL_17| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_10| |ULTIMATE.start_main_~#s~0#1.base|) 0))) (= (select |v_old(#valid)_AFTER_CALL_10| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_10| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 1))) (<= (+ |ULTIMATE.start_sll_append_~new_last~0#1.base| 1) |#StackHeapBarrier|) (not (= |ULTIMATE.start_sll_append_~new_last~0#1.base| 0)) (= |v_ULTIMATE.start_sll_append_~head#1.base_22| |ULTIMATE.start_main_~#s~0#1.base|) (exists ((|v_#length_75| (Array Int Int))) (= |#length| (store |v_#length_75| |ULTIMATE.start_sll_append_~new_last~0#1.base| 8))) (exists ((|v_#memory_$Pointer$.offset_65| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_65| |ULTIMATE.start_sll_append_~new_last~0#1.base| (store (store (select |v_#memory_$Pointer$.offset_65| |ULTIMATE.start_sll_append_~new_last~0#1.base|) 4 0) 0 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_append_~new_last~0#1.base|) 0))))) (exists ((|v_#valid_90| (Array Int Int))) (and (= (select |v_#valid_90| |ULTIMATE.start_sll_append_~new_last~0#1.base|) 0) (= (store |v_#valid_90| |ULTIMATE.start_sll_append_~new_last~0#1.base| 1) |#valid|))) (exists ((|v_#memory_$Pointer$.base_65| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_65| |ULTIMATE.start_sll_append_~new_last~0#1.base| (store (store (select |v_#memory_$Pointer$.base_65| |ULTIMATE.start_sll_append_~new_last~0#1.base|) 4 0) 0 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_append_~new_last~0#1.base|) 0)))))) (and (exists ((|v_#memory_int_43| (Array Int (Array Int Int))) (|v_#memory_int_44| (Array Int (Array Int Int)))) (and (= (store |v_#memory_int_43| |ULTIMATE.start_sll_append_~new_last~0#1.base| (store (select |v_#memory_int_43| |ULTIMATE.start_sll_append_~new_last~0#1.base|) 4 (select (select |v_#memory_int_44| |ULTIMATE.start_sll_append_~new_last~0#1.base|) 4))) |v_#memory_int_44|) (= |#memory_int| (store |v_#memory_int_44| |ULTIMATE.start_sll_append_~new_last~0#1.base| (store (select |v_#memory_int_44| |ULTIMATE.start_sll_append_~new_last~0#1.base|) 0 5))))) (exists ((|v_#memory_int_47| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_69| (Array Int (Array Int Int))) (|v_old(#memory_int)_AFTER_CALL_9| (Array Int (Array Int Int))) (|v_old(#valid)_AFTER_CALL_9| (Array Int Int)) (|v_old(#memory_$Pointer$.base)_AFTER_CALL_9| (Array Int (Array Int Int))) (|v_old(#length)_AFTER_CALL_9| (Array Int Int)) (|v_#memory_$Pointer$.base_69| (Array Int (Array Int Int)))) (and (= (select |v_old(#valid)_AFTER_CALL_9| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_9| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 1) (= |v_old(#memory_$Pointer$.base)_AFTER_CALL_9| (store |v_#memory_$Pointer$.base_69| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_9| |ULTIMATE.start_main_~#s~0#1.base|) 0) (store (select |v_#memory_$Pointer$.base_69| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_9| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4 (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_9| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_9| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4)))) (= (select (select |v_#memory_$Pointer$.offset_69| |ULTIMATE.start_main_~#s~0#1.base|) 0) 0) (= (store |v_#memory_int_47| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_9| |ULTIMATE.start_main_~#s~0#1.base|) 0) (store (select |v_#memory_int_47| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_9| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4 (select (select |v_old(#memory_int)_AFTER_CALL_9| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_9| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4))) |v_old(#memory_int)_AFTER_CALL_9|) (<= 8 (select |v_old(#length)_AFTER_CALL_9| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_9| |ULTIMATE.start_main_~#s~0#1.base|) 0))))) (<= (+ |ULTIMATE.start_sll_append_~new_last~0#1.base| 1) |#StackHeapBarrier|) (not (= |ULTIMATE.start_sll_append_~new_last~0#1.base| 0)) (= |v_ULTIMATE.start_sll_append_~head#1.base_22| |ULTIMATE.start_main_~#s~0#1.base|) (exists ((|v_#length_75| (Array Int Int))) (= |#length| (store |v_#length_75| |ULTIMATE.start_sll_append_~new_last~0#1.base| 8))) (exists ((|v_#memory_$Pointer$.offset_65| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_65| |ULTIMATE.start_sll_append_~new_last~0#1.base| (store (store (select |v_#memory_$Pointer$.offset_65| |ULTIMATE.start_sll_append_~new_last~0#1.base|) 4 0) 0 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_append_~new_last~0#1.base|) 0))))) (exists ((|v_#valid_90| (Array Int Int))) (and (= (select |v_#valid_90| |ULTIMATE.start_sll_append_~new_last~0#1.base|) 0) (= (store |v_#valid_90| |ULTIMATE.start_sll_append_~new_last~0#1.base| 1) |#valid|))) (exists ((|v_#memory_$Pointer$.base_65| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_65| |ULTIMATE.start_sll_append_~new_last~0#1.base| (store (store (select |v_#memory_$Pointer$.base_65| |ULTIMATE.start_sll_append_~new_last~0#1.base|) 4 0) 0 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_append_~new_last~0#1.base|) 0))))))))))' at error location [2024-11-02 11:24:26,013 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 11:24:26,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 11:24:26,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2024-11-02 11:24:26,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53641227] [2024-11-02 11:24:26,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 11:24:26,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 11:24:26,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:24:26,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 11:24:26,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=207, Unknown=1, NotChecked=0, Total=240 [2024-11-02 11:24:26,016 INFO L87 Difference]: Start difference. First operand 76 states and 84 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-02 11:24:26,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:24:26,070 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2024-11-02 11:24:26,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 11:24:26,071 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2024-11-02 11:24:26,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:24:26,072 INFO L225 Difference]: With dead ends: 80 [2024-11-02 11:24:26,072 INFO L226 Difference]: Without dead ends: 80 [2024-11-02 11:24:26,072 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=32, Invalid=207, Unknown=1, NotChecked=0, Total=240 [2024-11-02 11:24:26,073 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 2 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 11:24:26,074 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 207 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 11:24:26,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-11-02 11:24:26,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2024-11-02 11:24:26,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 43 states have (on average 1.930232558139535) internal successors, (83), 75 states have internal predecessors, (83), 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) [2024-11-02 11:24:26,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2024-11-02 11:24:26,079 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 19 [2024-11-02 11:24:26,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:24:26,079 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2024-11-02 11:24:26,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-02 11:24:26,079 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2024-11-02 11:24:26,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-02 11:24:26,080 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:24:26,080 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-02 11:24:26,101 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adfe3e54-d845-4eca-a870-ef5dadabf808/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-02 11:24:26,281 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adfe3e54-d845-4eca-a870-ef5dadabf808/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:24:26,281 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-02 11:24:26,282 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:24:26,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1248051152, now seen corresponding path program 2 times [2024-11-02 11:24:26,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:24:26,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716052719] [2024-11-02 11:24:26,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:24:26,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:24:26,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:24:26,879 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-02 11:24:26,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:24:26,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716052719] [2024-11-02 11:24:26,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716052719] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:24:26,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125353072] [2024-11-02 11:24:26,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-02 11:24:26,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:24:26,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adfe3e54-d845-4eca-a870-ef5dadabf808/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:24:26,882 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adfe3e54-d845-4eca-a870-ef5dadabf808/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:24:26,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adfe3e54-d845-4eca-a870-ef5dadabf808/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 11:24:27,061 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-02 11:24:27,062 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 11:24:27,064 INFO L255 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-02 11:24:27,067 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:24:27,107 INFO L378 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 [2024-11-02 11:24:27,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2024-11-02 11:24:27,143 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1))) is different from true [2024-11-02 11:24:27,174 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-02 11:24:27,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-02 11:24:27,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2024-11-02 11:24:27,255 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-02 11:24:27,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-02 11:24:27,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2024-11-02 11:24:27,329 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))))) is different from true [2024-11-02 11:24:27,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 11:24:27,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 14 treesize of output 9 [2024-11-02 11:24:27,362 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 8 not checked. [2024-11-02 11:24:27,362 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 11:24:27,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125353072] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:24:27,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1537441615] [2024-11-02 11:24:27,437 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-02 11:24:27,437 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 11:24:27,438 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 11:24:27,438 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 11:24:27,438 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 11:24:28,433 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 117 for LOIs [2024-11-02 11:24:28,847 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 11:24:34,489 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1291#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~uneq~0#1| 5) (= |ULTIMATE.start_sll_append_~head#1.offset| 0) (= |ULTIMATE.start_sll_append_~data#1| 5) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_sll_append_~new_last~0#1.offset| 0) (exists ((|v_ULTIMATE.start_sll_append_~head#1.base_23| Int)) (and (or (and (exists ((|v_#memory_$Pointer$.base_77| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_77| |ULTIMATE.start_sll_append_~new_last~0#1.base| (store (store (select |v_#memory_$Pointer$.base_77| |ULTIMATE.start_sll_append_~new_last~0#1.base|) 4 0) 0 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_append_~new_last~0#1.base|) 0))) |#memory_$Pointer$.base|)) (<= (+ |ULTIMATE.start_sll_append_~new_last~0#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#memory_$Pointer$.offset_BEFORE_CALL_33| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.offset_BEFORE_CALL_33| |ULTIMATE.start_main_~#s~0#1.base|) 0) 0)) (exists ((|v_#memory_$Pointer$.offset_77| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_77| |ULTIMATE.start_sll_append_~new_last~0#1.base| (store (store (select |v_#memory_$Pointer$.offset_77| |ULTIMATE.start_sll_append_~new_last~0#1.base|) 4 0) 0 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_append_~new_last~0#1.base|) 0))))) (not (= |ULTIMATE.start_sll_append_~new_last~0#1.base| 0)) (exists ((|v_#memory_int_55| (Array Int (Array Int Int))) (|v_#memory_int_56| (Array Int (Array Int Int)))) (and (= |#memory_int| (store |v_#memory_int_56| |ULTIMATE.start_sll_append_~new_last~0#1.base| (store (select |v_#memory_int_56| |ULTIMATE.start_sll_append_~new_last~0#1.base|) 0 5))) (= |v_#memory_int_56| (store |v_#memory_int_55| |ULTIMATE.start_sll_append_~new_last~0#1.base| (store (select |v_#memory_int_55| |ULTIMATE.start_sll_append_~new_last~0#1.base|) 4 (select (select |v_#memory_int_56| |ULTIMATE.start_sll_append_~new_last~0#1.base|) 4)))))) (= |v_ULTIMATE.start_sll_append_~head#1.base_23| |ULTIMATE.start_main_~#s~0#1.base|) (exists ((|v_#length_82| (Array Int Int))) (= (store |v_#length_82| |ULTIMATE.start_sll_append_~new_last~0#1.base| 8) |#length|)) (exists ((|v_#valid_103| (Array Int Int))) (and (= (select |v_#valid_103| |ULTIMATE.start_sll_append_~new_last~0#1.base|) 0) (= (store |v_#valid_103| |ULTIMATE.start_sll_append_~new_last~0#1.base| 1) |#valid|)))) (and (exists ((|v_#memory_$Pointer$.base_77| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_77| |ULTIMATE.start_sll_append_~new_last~0#1.base| (store (store (select |v_#memory_$Pointer$.base_77| |ULTIMATE.start_sll_append_~new_last~0#1.base|) 4 0) 0 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_append_~new_last~0#1.base|) 0))) |#memory_$Pointer$.base|)) (<= (+ |ULTIMATE.start_sll_append_~new_last~0#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#memory_$Pointer$.offset_77| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_77| |ULTIMATE.start_sll_append_~new_last~0#1.base| (store (store (select |v_#memory_$Pointer$.offset_77| |ULTIMATE.start_sll_append_~new_last~0#1.base|) 4 0) 0 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_append_~new_last~0#1.base|) 0))))) (not (= |ULTIMATE.start_sll_append_~new_last~0#1.base| 0)) (exists ((|v_#memory_int_55| (Array Int (Array Int Int))) (|v_#memory_int_56| (Array Int (Array Int Int)))) (and (= |#memory_int| (store |v_#memory_int_56| |ULTIMATE.start_sll_append_~new_last~0#1.base| (store (select |v_#memory_int_56| |ULTIMATE.start_sll_append_~new_last~0#1.base|) 0 5))) (= |v_#memory_int_56| (store |v_#memory_int_55| |ULTIMATE.start_sll_append_~new_last~0#1.base| (store (select |v_#memory_int_55| |ULTIMATE.start_sll_append_~new_last~0#1.base|) 4 (select (select |v_#memory_int_56| |ULTIMATE.start_sll_append_~new_last~0#1.base|) 4)))))) (= |v_ULTIMATE.start_sll_append_~head#1.base_23| |ULTIMATE.start_main_~#s~0#1.base|) (exists ((|v_#memory_$Pointer$.offset_BEFORE_CALL_35| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.offset_BEFORE_CALL_35| |ULTIMATE.start_main_~#s~0#1.base|) 0) 0)) (exists ((|v_#length_82| (Array Int Int))) (= (store |v_#length_82| |ULTIMATE.start_sll_append_~new_last~0#1.base| 8) |#length|)) (exists ((|v_#valid_103| (Array Int Int))) (and (= (select |v_#valid_103| |ULTIMATE.start_sll_append_~new_last~0#1.base|) 0) (= (store |v_#valid_103| |ULTIMATE.start_sll_append_~new_last~0#1.base| 1) |#valid|))))) (not (= (select |#valid| |v_ULTIMATE.start_sll_append_~head#1.base_23|) 1)))) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|))' at error location [2024-11-02 11:24:34,489 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 11:24:34,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 11:24:34,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2024-11-02 11:24:34,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303128547] [2024-11-02 11:24:34,489 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 11:24:34,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-02 11:24:34,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:24:34,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-02 11:24:34,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=524, Unknown=3, NotChecked=94, Total=702 [2024-11-02 11:24:34,492 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand has 14 states, 10 states have (on average 3.1) internal successors, (31), 12 states have internal predecessors, (31), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-02 11:24:34,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:24:34,979 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2024-11-02 11:24:34,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-02 11:24:34,980 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 3.1) internal successors, (31), 12 states have internal predecessors, (31), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 28 [2024-11-02 11:24:34,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:24:34,981 INFO L225 Difference]: With dead ends: 85 [2024-11-02 11:24:34,981 INFO L226 Difference]: Without dead ends: 85 [2024-11-02 11:24:34,982 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=105, Invalid=656, Unknown=3, NotChecked=106, Total=870 [2024-11-02 11:24:34,982 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 68 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 11:24:34,983 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 240 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 321 Invalid, 0 Unknown, 170 Unchecked, 0.3s Time] [2024-11-02 11:24:34,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-02 11:24:34,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 75. [2024-11-02 11:24:34,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 43 states have (on average 1.813953488372093) internal successors, (78), 70 states have internal predecessors, (78), 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) [2024-11-02 11:24:34,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2024-11-02 11:24:34,990 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 28 [2024-11-02 11:24:34,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:24:34,990 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2024-11-02 11:24:34,991 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 3.1) internal successors, (31), 12 states have internal predecessors, (31), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-02 11:24:34,991 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2024-11-02 11:24:34,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-02 11:24:34,994 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:24:34,994 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-02 11:24:35,017 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adfe3e54-d845-4eca-a870-ef5dadabf808/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-02 11:24:35,195 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adfe3e54-d845-4eca-a870-ef5dadabf808/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:24:35,195 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-02 11:24:35,196 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:24:35,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1248051151, now seen corresponding path program 1 times [2024-11-02 11:24:35,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:24:35,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913131808] [2024-11-02 11:24:35,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:24:35,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:24:35,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:24:35,962 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-02 11:24:35,962 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:24:35,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913131808] [2024-11-02 11:24:35,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913131808] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:24:35,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112617871] [2024-11-02 11:24:35,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:24:35,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:24:35,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adfe3e54-d845-4eca-a870-ef5dadabf808/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:24:35,965 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adfe3e54-d845-4eca-a870-ef5dadabf808/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:24:35,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adfe3e54-d845-4eca-a870-ef5dadabf808/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 11:24:36,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:24:36,100 INFO L255 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-02 11:24:36,103 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:24:36,118 INFO L378 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 8 treesize of output 1 [2024-11-02 11:24:36,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2024-11-02 11:24:36,199 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|))) is different from true [2024-11-02 11:24:36,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 11:24:36,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 14 treesize of output 9 [2024-11-02 11:24:36,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2024-11-02 11:24:36,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 11:24:36,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 14 treesize of output 9 [2024-11-02 11:24:36,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2024-11-02 11:24:36,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 11:24:36,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 14 treesize of output 9 [2024-11-02 11:24:36,476 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-02 11:24:36,476 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 11:24:36,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112617871] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:24:36,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 11:24:36,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 16 [2024-11-02 11:24:36,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645163324] [2024-11-02 11:24:36,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:24:36,478 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-02 11:24:36,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:24:36,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-02 11:24:36,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=222, Unknown=1, NotChecked=30, Total=306 [2024-11-02 11:24:36,479 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand has 7 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 11:24:36,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:24:36,644 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2024-11-02 11:24:36,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-02 11:24:36,645 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2024-11-02 11:24:36,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:24:36,646 INFO L225 Difference]: With dead ends: 72 [2024-11-02 11:24:36,647 INFO L226 Difference]: Without dead ends: 72 [2024-11-02 11:24:36,647 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=251, Unknown=1, NotChecked=32, Total=342 [2024-11-02 11:24:36,648 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 4 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:24:36,648 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 166 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 93 Unchecked, 0.1s Time] [2024-11-02 11:24:36,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-02 11:24:36,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2024-11-02 11:24:36,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 43 states have (on average 1.744186046511628) internal successors, (75), 67 states have internal predecessors, (75), 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) [2024-11-02 11:24:36,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2024-11-02 11:24:36,663 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 28 [2024-11-02 11:24:36,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:24:36,664 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2024-11-02 11:24:36,664 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 11:24:36,664 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2024-11-02 11:24:36,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-02 11:24:36,665 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:24:36,665 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:24:36,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adfe3e54-d845-4eca-a870-ef5dadabf808/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-02 11:24:36,865 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adfe3e54-d845-4eca-a870-ef5dadabf808/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:24:36,866 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-02 11:24:36,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:24:36,866 INFO L85 PathProgramCache]: Analyzing trace with hash 840024037, now seen corresponding path program 1 times [2024-11-02 11:24:36,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:24:36,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283607043] [2024-11-02 11:24:36,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:24:36,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:24:36,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:24:38,229 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-02 11:24:38,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:24:38,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283607043] [2024-11-02 11:24:38,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283607043] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:24:38,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788520644] [2024-11-02 11:24:38,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:24:38,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:24:38,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adfe3e54-d845-4eca-a870-ef5dadabf808/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:24:38,231 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adfe3e54-d845-4eca-a870-ef5dadabf808/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:24:38,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adfe3e54-d845-4eca-a870-ef5dadabf808/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-02 11:24:38,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:24:38,539 INFO L255 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-02 11:24:38,544 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:24:38,603 INFO L378 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 8 treesize of output 1 [2024-11-02 11:24:39,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2024-11-02 11:24:39,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3