./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcspn-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcspn-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E --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 86c4ccee9690ccdd33683565314ba095e56520aa142914bd8063fc7c4c92940d --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 05:16:25,181 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 05:16:25,266 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-14 05:16:25,274 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 05:16:25,274 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 05:16:25,305 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 05:16:25,305 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 05:16:25,306 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 05:16:25,306 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 05:16:25,306 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 05:16:25,306 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 05:16:25,306 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 05:16:25,306 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 05:16:25,307 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 05:16:25,307 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 05:16:25,307 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 05:16:25,307 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 05:16:25,307 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 05:16:25,307 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 05:16:25,307 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 05:16:25,307 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 05:16:25,307 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 05:16:25,308 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-14 05:16:25,308 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-14 05:16:25,308 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 05:16:25,308 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 05:16:25,308 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 05:16:25,308 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 05:16:25,309 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 05:16:25,309 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-14 05:16:25,309 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-14 05:16:25,309 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-14 05:16:25,309 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 05:16:25,309 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-14 05:16:25,309 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 05:16:25,309 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-14 05:16:25,309 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 05:16:25,309 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 05:16:25,310 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 05:16:25,310 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 05:16:25,310 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 05:16:25,310 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 05:16:25,310 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 05:16:25,310 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 05:16:25,310 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 05:16:25,311 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 05:16:25,311 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 05:16:25,311 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 05:16:25,311 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 05:16:25,311 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E 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 -> 86c4ccee9690ccdd33683565314ba095e56520aa142914bd8063fc7c4c92940d [2024-11-14 05:16:25,678 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 05:16:25,692 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 05:16:25,698 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 05:16:25,700 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 05:16:25,701 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 05:16:25,703 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/array-memsafety/openbsd_cstrcspn-alloca-2.i Unable to find full path for "g++" [2024-11-14 05:16:27,659 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 05:16:27,673 ERROR L? ?]: Error during toolchain job processing: java.lang.NullPointerException: Cannot invoke "String.equalsIgnoreCase(String)" because "kindStr" is null at org.eclipse.cdt.internal.core.model.PathEntry.kindFromString(PathEntry.java:80) at org.eclipse.cdt.internal.core.model.DefaultPathEntryStore.decodePathEntry(DefaultPathEntryStore.java:127) at org.eclipse.cdt.internal.core.model.DefaultPathEntryStore.getRawPathEntries(DefaultPathEntryStore.java:97) at org.eclipse.cdt.internal.core.model.PathEntryStoreProxy.getRawPathEntries(PathEntryStoreProxy.java:102) at org.eclipse.cdt.internal.core.model.PathEntryManager.getRawPathEntries(PathEntryManager.java:666) at org.eclipse.cdt.core.model.CoreModel.getRawPathEntries(CoreModel.java:937) at org.eclipse.cdt.core.model.CoreModel.oldIsScannerInformationEmpty(CoreModel.java:1307) at org.eclipse.cdt.core.model.CoreModel.isScannerInformationEmpty(CoreModel.java:1252) at org.eclipse.cdt.internal.core.pdom.indexer.ProjectIndexerInputAdapter.isFileBuildConfigured(ProjectIndexerInputAdapter.java:267) at org.eclipse.cdt.internal.core.pdom.AbstractIndexerTask.isRequiredInIndex(AbstractIndexerTask.java:748) at org.eclipse.cdt.internal.core.pdom.AbstractIndexerTask.extractFiles(AbstractIndexerTask.java:667) at org.eclipse.cdt.internal.core.pdom.AbstractIndexerTask.runTask(AbstractIndexerTask.java:558) at org.eclipse.cdt.internal.core.pdom.indexer.PDOMIndexerTask.run(PDOMIndexerTask.java:164) at org.eclipse.cdt.internal.core.pdom.PDOMIndexerJob.run(PDOMIndexerJob.java:160) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-14 05:16:27,988 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 05:16:27,988 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/sv-benchmarks/c/array-memsafety/openbsd_cstrcspn-alloca-2.i [2024-11-14 05:16:28,002 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/data/b4b126768/289f2909de4e4dd2b2d08ae286afd86d/FLAGf4587e124 [2024-11-14 05:16:28,017 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/data/b4b126768/289f2909de4e4dd2b2d08ae286afd86d [2024-11-14 05:16:28,020 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 05:16:28,022 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 05:16:28,023 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 05:16:28,023 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 05:16:28,028 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 05:16:28,029 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 05:16:28" (1/1) ... [2024-11-14 05:16:28,030 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f2e62d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:16:28, skipping insertion in model container [2024-11-14 05:16:28,030 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 05:16:28" (1/1) ... [2024-11-14 05:16:28,064 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 05:16:28,430 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-14 05:16:28,431 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-14 05:16:28,437 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 05:16:28,451 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 05:16:28,494 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 05:16:28,521 INFO L204 MainTranslator]: Completed translation [2024-11-14 05:16:28,522 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:16:28 WrapperNode [2024-11-14 05:16:28,522 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 05:16:28,523 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 05:16:28,523 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 05:16:28,523 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 05:16:28,530 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:16:28" (1/1) ... [2024-11-14 05:16:28,539 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:16:28" (1/1) ... [2024-11-14 05:16:28,558 INFO L138 Inliner]: procedures = 117, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 88 [2024-11-14 05:16:28,558 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 05:16:28,559 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 05:16:28,559 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 05:16:28,559 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 05:16:28,565 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:16:28" (1/1) ... [2024-11-14 05:16:28,565 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:16:28" (1/1) ... [2024-11-14 05:16:28,568 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:16:28" (1/1) ... [2024-11-14 05:16:28,570 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:16:28" (1/1) ... [2024-11-14 05:16:28,583 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:16:28" (1/1) ... [2024-11-14 05:16:28,586 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:16:28" (1/1) ... [2024-11-14 05:16:28,587 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:16:28" (1/1) ... [2024-11-14 05:16:28,588 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:16:28" (1/1) ... [2024-11-14 05:16:28,593 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 05:16:28,594 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 05:16:28,594 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 05:16:28,594 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 05:16:28,595 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:16:28" (1/1) ... [2024-11-14 05:16:28,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 05:16:28,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:16:28,630 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 05:16:28,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 05:16:28,656 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-14 05:16:28,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-14 05:16:28,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-14 05:16:28,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 05:16:28,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 05:16:28,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 05:16:28,783 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 05:16:28,786 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 05:16:29,033 INFO L? ?]: Removed 55 outVars from TransFormulas that were not future-live. [2024-11-14 05:16:29,033 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 05:16:29,120 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 05:16:29,120 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-14 05:16:29,121 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 05:16:29 BoogieIcfgContainer [2024-11-14 05:16:29,121 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 05:16:29,124 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 05:16:29,124 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 05:16:29,129 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 05:16:29,129 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 05:16:28" (1/3) ... [2024-11-14 05:16:29,130 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@611e0a3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 05:16:29, skipping insertion in model container [2024-11-14 05:16:29,130 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:16:28" (2/3) ... [2024-11-14 05:16:29,130 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@611e0a3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 05:16:29, skipping insertion in model container [2024-11-14 05:16:29,130 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 05:16:29" (3/3) ... [2024-11-14 05:16:29,135 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcspn-alloca-2.i [2024-11-14 05:16:29,152 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 05:16:29,154 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG openbsd_cstrcspn-alloca-2.i that has 1 procedures, 29 locations, 1 initial locations, 4 loop locations, and 13 error locations. [2024-11-14 05:16:29,199 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 05:16:29,214 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;@7adff9fe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 05:16:29,214 INFO L334 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2024-11-14 05:16:29,220 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:29,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-14 05:16:29,228 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:16:29,228 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-14 05:16:29,229 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:16:29,234 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:16:29,234 INFO L85 PathProgramCache]: Analyzing trace with hash 133356, now seen corresponding path program 1 times [2024-11-14 05:16:29,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:16:29,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077298002] [2024-11-14 05:16:29,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:16:29,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:16:29,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:16:29,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:16:29,594 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:16:29,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077298002] [2024-11-14 05:16:29,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077298002] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:16:29,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:16:29,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-14 05:16:29,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164179464] [2024-11-14 05:16:29,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:16:29,602 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:16:29,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:16:29,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:16:29,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:16:29,630 INFO L87 Difference]: Start difference. First operand has 29 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:29,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:16:29,716 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2024-11-14 05:16:29,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:16:29,719 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2024-11-14 05:16:29,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:16:29,732 INFO L225 Difference]: With dead ends: 27 [2024-11-14 05:16:29,732 INFO L226 Difference]: Without dead ends: 26 [2024-11-14 05:16:29,735 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:16:29,740 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 10 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:16:29,741 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 24 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:16:29,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-14 05:16:29,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-11-14 05:16:29,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:29,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2024-11-14 05:16:29,779 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 3 [2024-11-14 05:16:29,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:16:29,780 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2024-11-14 05:16:29,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:29,781 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2024-11-14 05:16:29,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-14 05:16:29,782 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:16:29,782 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-14 05:16:29,784 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 05:16:29,784 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:16:29,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:16:29,785 INFO L85 PathProgramCache]: Analyzing trace with hash 133357, now seen corresponding path program 1 times [2024-11-14 05:16:29,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:16:29,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528431241] [2024-11-14 05:16:29,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:16:29,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:16:29,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:16:30,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:16:30,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:16:30,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528431241] [2024-11-14 05:16:30,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528431241] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:16:30,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:16:30,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 05:16:30,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773935528] [2024-11-14 05:16:30,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:16:30,245 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 05:16:30,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:16:30,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 05:16:30,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 05:16:30,246 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:30,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:16:30,376 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2024-11-14 05:16:30,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 05:16:30,376 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2024-11-14 05:16:30,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:16:30,377 INFO L225 Difference]: With dead ends: 25 [2024-11-14 05:16:30,377 INFO L226 Difference]: Without dead ends: 25 [2024-11-14 05:16:30,378 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:16:30,379 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:16:30,381 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 45 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:16:30,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-14 05:16:30,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-11-14 05:16:30,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:30,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2024-11-14 05:16:30,388 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 3 [2024-11-14 05:16:30,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:16:30,389 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2024-11-14 05:16:30,389 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:30,389 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2024-11-14 05:16:30,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-14 05:16:30,389 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:16:30,390 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-14 05:16:30,390 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 05:16:30,390 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:16:30,390 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:16:30,391 INFO L85 PathProgramCache]: Analyzing trace with hash 4214252, now seen corresponding path program 1 times [2024-11-14 05:16:30,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:16:30,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742356220] [2024-11-14 05:16:30,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:16:30,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:16:30,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:16:30,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:16:30,719 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:16:30,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742356220] [2024-11-14 05:16:30,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742356220] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:16:30,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:16:30,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 05:16:30,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197304949] [2024-11-14 05:16:30,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:16:30,719 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 05:16:30,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:16:30,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 05:16:30,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 05:16:30,720 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:30,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:16:30,769 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2024-11-14 05:16:30,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:16:30,770 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-14 05:16:30,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:16:30,770 INFO L225 Difference]: With dead ends: 24 [2024-11-14 05:16:30,770 INFO L226 Difference]: Without dead ends: 24 [2024-11-14 05:16:30,771 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 05:16:30,771 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 12 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:16:30,772 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 27 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 05:16:30,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-14 05:16:30,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-14 05:16:30,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.8) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:30,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2024-11-14 05:16:30,777 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 4 [2024-11-14 05:16:30,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:16:30,778 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2024-11-14 05:16:30,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:30,778 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2024-11-14 05:16:30,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-14 05:16:30,778 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:16:30,778 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-14 05:16:30,778 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 05:16:30,779 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:16:30,779 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:16:30,779 INFO L85 PathProgramCache]: Analyzing trace with hash 4212352, now seen corresponding path program 1 times [2024-11-14 05:16:30,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:16:30,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284692250] [2024-11-14 05:16:30,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:16:30,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:16:30,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:16:30,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:16:30,819 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:16:30,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284692250] [2024-11-14 05:16:30,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284692250] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:16:30,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:16:30,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-14 05:16:30,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102646457] [2024-11-14 05:16:30,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:16:30,820 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:16:30,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:16:30,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:16:30,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:16:30,821 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:30,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:16:30,857 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2024-11-14 05:16:30,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:16:30,857 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-14 05:16:30,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:16:30,858 INFO L225 Difference]: With dead ends: 22 [2024-11-14 05:16:30,858 INFO L226 Difference]: Without dead ends: 22 [2024-11-14 05:16:30,858 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:16:30,859 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:16:30,859 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 22 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 05:16:30,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-14 05:16:30,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-11-14 05:16:30,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:30,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2024-11-14 05:16:30,862 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 4 [2024-11-14 05:16:30,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:16:30,862 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2024-11-14 05:16:30,862 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:30,862 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2024-11-14 05:16:30,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-14 05:16:30,863 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:16:30,863 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-14 05:16:30,863 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-14 05:16:30,863 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:16:30,863 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:16:30,864 INFO L85 PathProgramCache]: Analyzing trace with hash 4212353, now seen corresponding path program 1 times [2024-11-14 05:16:30,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:16:30,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395643308] [2024-11-14 05:16:30,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:16:30,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:16:30,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:16:31,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:16:31,075 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:16:31,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395643308] [2024-11-14 05:16:31,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395643308] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:16:31,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:16:31,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 05:16:31,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233782710] [2024-11-14 05:16:31,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:16:31,077 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 05:16:31,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:16:31,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 05:16:31,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:16:31,078 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:31,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:16:31,169 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2024-11-14 05:16:31,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 05:16:31,170 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-14 05:16:31,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:16:31,170 INFO L225 Difference]: With dead ends: 24 [2024-11-14 05:16:31,170 INFO L226 Difference]: Without dead ends: 24 [2024-11-14 05:16:31,171 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:16:31,171 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 10 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:16:31,171 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 35 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:16:31,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-14 05:16:31,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-14 05:16:31,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:31,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2024-11-14 05:16:31,181 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 4 [2024-11-14 05:16:31,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:16:31,181 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2024-11-14 05:16:31,182 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:31,182 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2024-11-14 05:16:31,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-14 05:16:31,182 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:16:31,182 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-14 05:16:31,183 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-14 05:16:31,184 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:16:31,184 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:16:31,184 INFO L85 PathProgramCache]: Analyzing trace with hash 130641803, now seen corresponding path program 1 times [2024-11-14 05:16:31,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:16:31,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199687765] [2024-11-14 05:16:31,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:16:31,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:16:31,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:16:31,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:16:31,449 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:16:31,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199687765] [2024-11-14 05:16:31,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199687765] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:16:31,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:16:31,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 05:16:31,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502961229] [2024-11-14 05:16:31,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:16:31,450 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 05:16:31,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:16:31,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 05:16:31,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:16:31,451 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:31,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:16:31,499 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2024-11-14 05:16:31,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:16:31,499 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-11-14 05:16:31,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:16:31,500 INFO L225 Difference]: With dead ends: 23 [2024-11-14 05:16:31,500 INFO L226 Difference]: Without dead ends: 23 [2024-11-14 05:16:31,500 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:16:31,501 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 5 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:16:31,501 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 43 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 05:16:31,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-11-14 05:16:31,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-11-14 05:16:31,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.588235294117647) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:31,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2024-11-14 05:16:31,504 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 5 [2024-11-14 05:16:31,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:16:31,505 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2024-11-14 05:16:31,505 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:31,505 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2024-11-14 05:16:31,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-14 05:16:31,505 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:16:31,505 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2024-11-14 05:16:31,506 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-14 05:16:31,506 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:16:31,506 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:16:31,507 INFO L85 PathProgramCache]: Analyzing trace with hash -246841957, now seen corresponding path program 1 times [2024-11-14 05:16:31,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:16:31,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802801767] [2024-11-14 05:16:31,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:16:31,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:16:31,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:16:31,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:16:31,803 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:16:31,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802801767] [2024-11-14 05:16:31,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802801767] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:16:31,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206288744] [2024-11-14 05:16:31,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:16:31,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:16:31,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:16:31,806 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:16:31,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 05:16:31,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:16:31,886 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-14 05:16:31,893 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:16:31,999 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 7 [2024-11-14 05:16:32,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:16:32,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-14 05:16:32,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:16:32,228 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:16:32,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:16:32,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206288744] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:16:32,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1043131432] [2024-11-14 05:16:32,513 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2024-11-14 05:16:32,514 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:16:32,518 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:16:32,523 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:16:32,524 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:16:33,465 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:16:34,045 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '393#(and (exists ((|v_ULTIMATE.start_main_~i~1#1_35| Int) (|v_ULTIMATE.start_main_~nondetString2~0#1.base_29| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet12#1|)) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 2 |v_ULTIMATE.start_main_~nondetString2~0#1.base_29|) (<= |ULTIMATE.start_main_#t~nondet12#1| 127) (<= (select |#length| |v_ULTIMATE.start_main_~nondetString2~0#1.base_29|) |v_ULTIMATE.start_main_~i~1#1_35|) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 2 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |v_ULTIMATE.start_main_~i~1#1_35|) (<= 2 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647))) (= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0))' at error location [2024-11-14 05:16:34,045 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:16:34,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:16:34,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-11-14 05:16:34,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682442826] [2024-11-14 05:16:34,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:16:34,047 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-14 05:16:34,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:16:34,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-14 05:16:34,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2024-11-14 05:16:34,049 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:34,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:16:34,305 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2024-11-14 05:16:34,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 05:16:34,307 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-14 05:16:34,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:16:34,308 INFO L225 Difference]: With dead ends: 23 [2024-11-14 05:16:34,308 INFO L226 Difference]: Without dead ends: 23 [2024-11-14 05:16:34,308 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2024-11-14 05:16:34,309 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 11 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:16:34,309 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 77 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:16:34,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-11-14 05:16:34,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2024-11-14 05:16:34,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:34,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2024-11-14 05:16:34,315 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 6 [2024-11-14 05:16:34,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:16:34,315 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2024-11-14 05:16:34,316 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:34,316 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2024-11-14 05:16:34,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-14 05:16:34,316 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:16:34,316 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:16:34,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 05:16:34,517 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:16:34,518 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:16:34,518 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:16:34,518 INFO L85 PathProgramCache]: Analyzing trace with hash 992764280, now seen corresponding path program 1 times [2024-11-14 05:16:34,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:16:34,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506301684] [2024-11-14 05:16:34,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:16:34,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:16:34,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:16:34,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:16:34,614 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:16:34,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506301684] [2024-11-14 05:16:34,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506301684] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:16:34,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:16:34,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 05:16:34,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497416704] [2024-11-14 05:16:34,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:16:34,615 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 05:16:34,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:16:34,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 05:16:34,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:16:34,616 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:34,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:16:34,690 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2024-11-14 05:16:34,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 05:16:34,703 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-14 05:16:34,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:16:34,703 INFO L225 Difference]: With dead ends: 19 [2024-11-14 05:16:34,703 INFO L226 Difference]: Without dead ends: 19 [2024-11-14 05:16:34,704 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:16:34,704 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:16:34,706 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 25 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:16:34,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-11-14 05:16:34,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-11-14 05:16:34,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:34,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2024-11-14 05:16:34,708 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 7 [2024-11-14 05:16:34,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:16:34,708 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2024-11-14 05:16:34,709 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:34,709 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2024-11-14 05:16:34,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-14 05:16:34,709 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:16:34,709 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:16:34,709 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-14 05:16:34,710 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:16:34,710 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:16:34,710 INFO L85 PathProgramCache]: Analyzing trace with hash 992764281, now seen corresponding path program 1 times [2024-11-14 05:16:34,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:16:34,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14665888] [2024-11-14 05:16:34,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:16:34,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:16:34,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:16:34,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:16:34,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:16:34,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14665888] [2024-11-14 05:16:34,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14665888] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:16:34,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:16:34,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 05:16:34,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063568758] [2024-11-14 05:16:34,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:16:34,870 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 05:16:34,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:16:34,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 05:16:34,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:16:34,871 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:34,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:16:34,941 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2024-11-14 05:16:34,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 05:16:34,941 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-14 05:16:34,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:16:34,942 INFO L225 Difference]: With dead ends: 21 [2024-11-14 05:16:34,942 INFO L226 Difference]: Without dead ends: 21 [2024-11-14 05:16:34,942 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:16:34,943 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:16:34,943 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 39 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:16:34,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-14 05:16:34,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-11-14 05:16:34,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.411764705882353) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:34,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2024-11-14 05:16:34,946 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 7 [2024-11-14 05:16:34,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:16:34,947 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2024-11-14 05:16:34,947 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:34,947 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2024-11-14 05:16:34,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-14 05:16:34,948 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:16:34,948 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:16:34,948 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-14 05:16:34,948 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:16:34,949 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:16:34,949 INFO L85 PathProgramCache]: Analyzing trace with hash 563766234, now seen corresponding path program 1 times [2024-11-14 05:16:34,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:16:34,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484523988] [2024-11-14 05:16:34,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:16:34,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:16:34,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:16:35,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:16:35,029 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:16:35,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484523988] [2024-11-14 05:16:35,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484523988] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:16:35,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:16:35,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 05:16:35,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925102774] [2024-11-14 05:16:35,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:16:35,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 05:16:35,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:16:35,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 05:16:35,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:16:35,031 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:35,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:16:35,118 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2024-11-14 05:16:35,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 05:16:35,119 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-14 05:16:35,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:16:35,120 INFO L225 Difference]: With dead ends: 20 [2024-11-14 05:16:35,120 INFO L226 Difference]: Without dead ends: 20 [2024-11-14 05:16:35,120 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-14 05:16:35,121 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 17 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:16:35,121 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 23 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:16:35,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-14 05:16:35,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-11-14 05:16:35,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:35,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2024-11-14 05:16:35,124 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 9 [2024-11-14 05:16:35,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:16:35,124 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2024-11-14 05:16:35,124 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:35,125 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2024-11-14 05:16:35,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-14 05:16:35,125 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:16:35,125 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:16:35,125 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-14 05:16:35,126 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:16:35,126 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:16:35,126 INFO L85 PathProgramCache]: Analyzing trace with hash 563766235, now seen corresponding path program 1 times [2024-11-14 05:16:35,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:16:35,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078435807] [2024-11-14 05:16:35,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:16:35,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:16:35,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:16:35,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:16:35,332 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:16:35,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078435807] [2024-11-14 05:16:35,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078435807] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:16:35,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:16:35,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 05:16:35,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979013380] [2024-11-14 05:16:35,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:16:35,333 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 05:16:35,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:16:35,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 05:16:35,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:16:35,334 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:35,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:16:35,436 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2024-11-14 05:16:35,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 05:16:35,437 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-14 05:16:35,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:16:35,437 INFO L225 Difference]: With dead ends: 22 [2024-11-14 05:16:35,437 INFO L226 Difference]: Without dead ends: 22 [2024-11-14 05:16:35,438 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-14 05:16:35,438 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:16:35,439 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 34 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:16:35,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-14 05:16:35,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-11-14 05:16:35,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:35,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2024-11-14 05:16:35,443 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 9 [2024-11-14 05:16:35,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:16:35,444 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2024-11-14 05:16:35,444 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:35,444 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2024-11-14 05:16:35,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-14 05:16:35,444 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:16:35,444 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:16:35,445 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-14 05:16:35,445 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:16:35,445 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:16:35,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1838716403, now seen corresponding path program 1 times [2024-11-14 05:16:35,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:16:35,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568960910] [2024-11-14 05:16:35,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:16:35,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:16:35,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:16:35,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:16:35,664 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:16:35,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568960910] [2024-11-14 05:16:35,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568960910] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:16:35,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:16:35,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 05:16:35,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496020435] [2024-11-14 05:16:35,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:16:35,665 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 05:16:35,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:16:35,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 05:16:35,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 05:16:35,666 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:35,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:16:35,713 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2024-11-14 05:16:35,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 05:16:35,715 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-14 05:16:35,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:16:35,716 INFO L225 Difference]: With dead ends: 21 [2024-11-14 05:16:35,716 INFO L226 Difference]: Without dead ends: 19 [2024-11-14 05:16:35,716 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 05:16:35,717 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 9 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:16:35,717 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 20 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 05:16:35,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-11-14 05:16:35,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-11-14 05:16:35,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:35,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2024-11-14 05:16:35,723 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 12 [2024-11-14 05:16:35,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:16:35,723 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2024-11-14 05:16:35,724 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:35,724 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2024-11-14 05:16:35,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-14 05:16:35,725 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:16:35,725 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:16:35,725 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-14 05:16:35,725 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:16:35,726 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:16:35,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1165685856, now seen corresponding path program 1 times [2024-11-14 05:16:35,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:16:35,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603043343] [2024-11-14 05:16:35,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:16:35,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:16:35,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:16:35,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:16:35,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:16:35,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603043343] [2024-11-14 05:16:35,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603043343] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:16:35,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:16:35,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-14 05:16:35,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274107264] [2024-11-14 05:16:35,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:16:35,993 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-14 05:16:35,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:16:35,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-14 05:16:35,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-14 05:16:35,994 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:36,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:16:36,137 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2024-11-14 05:16:36,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 05:16:36,137 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-14 05:16:36,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:16:36,138 INFO L225 Difference]: With dead ends: 32 [2024-11-14 05:16:36,138 INFO L226 Difference]: Without dead ends: 32 [2024-11-14 05:16:36,139 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-14 05:16:36,139 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 14 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:16:36,140 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 44 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:16:36,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-14 05:16:36,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2024-11-14 05:16:36,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 28 states have (on average 1.25) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:36,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2024-11-14 05:16:36,145 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 13 [2024-11-14 05:16:36,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:16:36,145 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2024-11-14 05:16:36,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:36,145 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2024-11-14 05:16:36,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-14 05:16:36,146 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:16:36,146 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:16:36,146 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-14 05:16:36,149 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:16:36,149 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:16:36,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1165683678, now seen corresponding path program 1 times [2024-11-14 05:16:36,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:16:36,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382542618] [2024-11-14 05:16:36,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:16:36,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:16:36,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:16:36,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:16:36,572 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:16:36,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382542618] [2024-11-14 05:16:36,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382542618] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:16:36,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:16:36,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-14 05:16:36,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337225737] [2024-11-14 05:16:36,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:16:36,573 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-14 05:16:36,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:16:36,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-14 05:16:36,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-14 05:16:36,574 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:36,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:16:36,716 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2024-11-14 05:16:36,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 05:16:36,717 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-14 05:16:36,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:16:36,718 INFO L225 Difference]: With dead ends: 54 [2024-11-14 05:16:36,718 INFO L226 Difference]: Without dead ends: 46 [2024-11-14 05:16:36,718 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-14 05:16:36,719 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:16:36,719 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 39 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:16:36,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-14 05:16:36,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2024-11-14 05:16:36,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 43 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:36,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2024-11-14 05:16:36,726 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 13 [2024-11-14 05:16:36,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:16:36,726 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2024-11-14 05:16:36,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:36,726 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2024-11-14 05:16:36,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-14 05:16:36,726 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:16:36,727 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:16:36,727 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-14 05:16:36,727 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:16:36,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:16:36,731 INFO L85 PathProgramCache]: Analyzing trace with hash -257083258, now seen corresponding path program 1 times [2024-11-14 05:16:36,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:16:36,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352109362] [2024-11-14 05:16:36,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:16:36,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:16:36,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:16:37,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:16:37,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:16:37,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352109362] [2024-11-14 05:16:37,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352109362] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:16:37,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537354274] [2024-11-14 05:16:37,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:16:37,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:16:37,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:16:37,053 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:16:37,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 05:16:37,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:16:37,151 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-14 05:16:37,152 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:16:37,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:16:37,320 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:16:37,569 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 [2024-11-14 05:16:37,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:16:37,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537354274] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:16:37,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1487921648] [2024-11-14 05:16:37,611 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:16:37,613 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:16:37,613 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:16:37,613 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:16:37,613 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:16:39,374 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:16:40,974 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '975#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_21| Int) (|v_ULTIMATE.start_cstrcspn_#t~post2#1.base_21| Int)) (and (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_21|) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post2#1.base_21|) |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_21|) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (or (and (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (= |ULTIMATE.start_cstrcspn_~spanp~0#1.offset| 1) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0)) (and (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (= |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_21| 0)))))' at error location [2024-11-14 05:16:40,975 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:16:40,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:16:40,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-11-14 05:16:40,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229994248] [2024-11-14 05:16:40,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:16:40,975 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-14 05:16:40,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:16:40,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-14 05:16:40,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2024-11-14 05:16:40,977 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:41,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:16:41,192 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2024-11-14 05:16:41,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 05:16:41,192 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-14 05:16:41,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:16:41,193 INFO L225 Difference]: With dead ends: 59 [2024-11-14 05:16:41,193 INFO L226 Difference]: Without dead ends: 59 [2024-11-14 05:16:41,195 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2024-11-14 05:16:41,195 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 8 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:16:41,195 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 73 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:16:41,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-14 05:16:41,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2024-11-14 05:16:41,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 56 states have (on average 1.2142857142857142) internal successors, (68), 57 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:41,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2024-11-14 05:16:41,200 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 15 [2024-11-14 05:16:41,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:16:41,200 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2024-11-14 05:16:41,200 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:41,203 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2024-11-14 05:16:41,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-14 05:16:41,204 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:16:41,204 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:16:41,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-14 05:16:41,404 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:16:41,404 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:16:41,405 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:16:41,405 INFO L85 PathProgramCache]: Analyzing trace with hash 89463430, now seen corresponding path program 1 times [2024-11-14 05:16:41,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:16:41,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913059439] [2024-11-14 05:16:41,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:16:41,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:16:41,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:16:41,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:16:41,812 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:16:41,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913059439] [2024-11-14 05:16:41,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913059439] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:16:41,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180585648] [2024-11-14 05:16:41,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:16:41,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:16:41,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:16:41,814 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:16:41,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 05:16:41,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:16:41,898 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-14 05:16:41,900 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:16:42,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:16:42,031 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:16:42,204 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 [2024-11-14 05:16:42,237 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:16:42,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180585648] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:16:42,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1035405765] [2024-11-14 05:16:42,240 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:16:42,240 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:16:42,240 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:16:42,240 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:16:42,240 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:16:43,074 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:16:44,581 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1213#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_30| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_30| Int)) (and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_30|) (= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_30|) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_30|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_30|) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|)))' at error location [2024-11-14 05:16:44,581 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:16:44,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:16:44,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2024-11-14 05:16:44,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693684450] [2024-11-14 05:16:44,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:16:44,582 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-14 05:16:44,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:16:44,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-14 05:16:44,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=956, Unknown=1, NotChecked=0, Total=1056 [2024-11-14 05:16:44,583 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand has 21 states, 20 states have (on average 1.75) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:44,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:16:44,947 INFO L93 Difference]: Finished difference Result 78 states and 89 transitions. [2024-11-14 05:16:44,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-14 05:16:44,947 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.75) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-14 05:16:44,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:16:44,949 INFO L225 Difference]: With dead ends: 78 [2024-11-14 05:16:44,949 INFO L226 Difference]: Without dead ends: 78 [2024-11-14 05:16:44,949 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=143, Invalid=1262, Unknown=1, NotChecked=0, Total=1406 [2024-11-14 05:16:44,950 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 29 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:16:44,951 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 123 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:16:44,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-14 05:16:44,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 70. [2024-11-14 05:16:44,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 68 states have (on average 1.2058823529411764) internal successors, (82), 69 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:44,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2024-11-14 05:16:44,960 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 15 [2024-11-14 05:16:44,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:16:44,960 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2024-11-14 05:16:44,960 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.75) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:44,961 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2024-11-14 05:16:44,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-14 05:16:44,961 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:16:44,961 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:16:44,981 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 05:16:45,162 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-14 05:16:45,162 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:16:45,162 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:16:45,162 INFO L85 PathProgramCache]: Analyzing trace with hash -900440693, now seen corresponding path program 2 times [2024-11-14 05:16:45,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:16:45,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774474596] [2024-11-14 05:16:45,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:16:45,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:16:45,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:16:45,537 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:16:45,537 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:16:45,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774474596] [2024-11-14 05:16:45,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774474596] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:16:45,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864769760] [2024-11-14 05:16:45,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:16:45,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:16:45,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:16:45,541 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:16:45,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 05:16:45,629 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 05:16:45,629 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:16:45,631 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-14 05:16:45,632 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:16:45,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 9 [2024-11-14 05:16:45,785 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:16:45,786 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:16:45,813 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 15 treesize of output 13 [2024-11-14 05:16:45,817 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 16 treesize of output 12 [2024-11-14 05:16:45,883 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:16:45,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864769760] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:16:45,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2118403661] [2024-11-14 05:16:45,885 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:16:45,885 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:16:45,885 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:16:45,885 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:16:45,885 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:16:46,655 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:16:48,037 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1514#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_42| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_42| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_42|) (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_42|) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_42|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_42|) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|)))' at error location [2024-11-14 05:16:48,040 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:16:48,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:16:48,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 23 [2024-11-14 05:16:48,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199798276] [2024-11-14 05:16:48,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:16:48,041 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-14 05:16:48,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:16:48,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-14 05:16:48,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1081, Unknown=1, NotChecked=0, Total=1190 [2024-11-14 05:16:48,042 INFO L87 Difference]: Start difference. First operand 70 states and 82 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:48,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:16:48,423 INFO L93 Difference]: Finished difference Result 118 states and 133 transitions. [2024-11-14 05:16:48,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-14 05:16:48,424 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-11-14 05:16:48,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:16:48,425 INFO L225 Difference]: With dead ends: 118 [2024-11-14 05:16:48,425 INFO L226 Difference]: Without dead ends: 106 [2024-11-14 05:16:48,426 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=172, Invalid=1719, Unknown=1, NotChecked=0, Total=1892 [2024-11-14 05:16:48,427 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 29 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:16:48,427 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 159 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:16:48,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-11-14 05:16:48,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 98. [2024-11-14 05:16:48,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 96 states have (on average 1.1875) internal successors, (114), 97 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:48,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 114 transitions. [2024-11-14 05:16:48,433 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 114 transitions. Word has length 19 [2024-11-14 05:16:48,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:16:48,434 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 114 transitions. [2024-11-14 05:16:48,434 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:48,434 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 114 transitions. [2024-11-14 05:16:48,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-14 05:16:48,435 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:16:48,435 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:16:48,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 05:16:48,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-14 05:16:48,639 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:16:48,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:16:48,639 INFO L85 PathProgramCache]: Analyzing trace with hash -428899029, now seen corresponding path program 2 times [2024-11-14 05:16:48,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:16:48,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697893363] [2024-11-14 05:16:48,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:16:48,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:16:48,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:16:49,111 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:16:49,111 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:16:49,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697893363] [2024-11-14 05:16:49,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697893363] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:16:49,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224078617] [2024-11-14 05:16:49,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:16:49,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:16:49,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:16:49,114 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:16:49,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 05:16:49,211 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 05:16:49,211 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:16:49,213 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-14 05:16:49,216 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:16:49,222 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 10 treesize of output 8 [2024-11-14 05:16:49,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 05:16:49,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 05:16:49,462 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:16:49,462 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:16:49,552 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:16:49,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 23 treesize of output 24 [2024-11-14 05:16:49,561 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:16:49,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2024-11-14 05:16:49,675 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:16:49,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224078617] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:16:49,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [255709054] [2024-11-14 05:16:49,677 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:16:49,677 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:16:49,677 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:16:49,677 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:16:49,677 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:16:50,797 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:16:51,952 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1904#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post2#1.base_37| Int) (|v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_37| Int)) (and (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_37|) (or (and (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (= |ULTIMATE.start_cstrcspn_~spanp~0#1.offset| 1) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0)) (and (= |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_37| 0) (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0))) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post2#1.base_37|) |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_37|) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|)))' at error location [2024-11-14 05:16:51,952 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:16:51,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:16:51,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 23 [2024-11-14 05:16:51,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814671154] [2024-11-14 05:16:51,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:16:51,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-14 05:16:51,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:16:51,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-14 05:16:51,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1150, Unknown=7, NotChecked=0, Total=1260 [2024-11-14 05:16:51,954 INFO L87 Difference]: Start difference. First operand 98 states and 114 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:52,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:16:52,239 INFO L93 Difference]: Finished difference Result 170 states and 191 transitions. [2024-11-14 05:16:52,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-14 05:16:52,240 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-11-14 05:16:52,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:16:52,241 INFO L225 Difference]: With dead ends: 170 [2024-11-14 05:16:52,241 INFO L226 Difference]: Without dead ends: 134 [2024-11-14 05:16:52,241 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=128, Invalid=1425, Unknown=7, NotChecked=0, Total=1560 [2024-11-14 05:16:52,242 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:16:52,242 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 157 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:16:52,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-11-14 05:16:52,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 119. [2024-11-14 05:16:52,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 117 states have (on average 1.1965811965811965) internal successors, (140), 118 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:52,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 140 transitions. [2024-11-14 05:16:52,253 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 140 transitions. Word has length 21 [2024-11-14 05:16:52,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:16:52,254 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 140 transitions. [2024-11-14 05:16:52,254 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:52,254 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 140 transitions. [2024-11-14 05:16:52,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-14 05:16:52,258 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:16:52,258 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:16:52,277 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 05:16:52,458 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-14 05:16:52,459 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:16:52,459 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:16:52,459 INFO L85 PathProgramCache]: Analyzing trace with hash -978923727, now seen corresponding path program 3 times [2024-11-14 05:16:52,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:16:52,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577836294] [2024-11-14 05:16:52,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:16:52,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:16:52,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:16:52,818 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:16:52,818 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:16:52,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577836294] [2024-11-14 05:16:52,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577836294] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:16:52,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197399167] [2024-11-14 05:16:52,819 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:16:52,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:16:52,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:16:52,821 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:16:52,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 05:16:52,917 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:16:52,917 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:16:52,919 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-14 05:16:52,920 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:16:53,100 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:16:53,100 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:16:53,271 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 21 treesize of output 17 [2024-11-14 05:16:53,382 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:16:53,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197399167] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:16:53,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [512614273] [2024-11-14 05:16:53,384 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:16:53,384 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:16:53,385 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:16:53,385 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:16:53,385 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:16:54,000 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:16:55,353 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2360#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_62| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_62| Int)) (and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_62|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_62|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_62|) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_62|) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|)))' at error location [2024-11-14 05:16:55,354 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:16:55,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:16:55,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 25 [2024-11-14 05:16:55,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196193695] [2024-11-14 05:16:55,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:16:55,354 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-14 05:16:55,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:16:55,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-14 05:16:55,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1332, Unknown=1, NotChecked=0, Total=1482 [2024-11-14 05:16:55,356 INFO L87 Difference]: Start difference. First operand 119 states and 140 transitions. Second operand has 27 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:55,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:16:55,852 INFO L93 Difference]: Finished difference Result 150 states and 173 transitions. [2024-11-14 05:16:55,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-14 05:16:55,853 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-11-14 05:16:55,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:16:55,854 INFO L225 Difference]: With dead ends: 150 [2024-11-14 05:16:55,854 INFO L226 Difference]: Without dead ends: 150 [2024-11-14 05:16:55,854 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=214, Invalid=1855, Unknown=1, NotChecked=0, Total=2070 [2024-11-14 05:16:55,855 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 64 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:16:55,855 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 138 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 05:16:55,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-11-14 05:16:55,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 135. [2024-11-14 05:16:55,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 133 states have (on average 1.1954887218045114) internal successors, (159), 134 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:55,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 159 transitions. [2024-11-14 05:16:55,861 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 159 transitions. Word has length 21 [2024-11-14 05:16:55,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:16:55,862 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 159 transitions. [2024-11-14 05:16:55,862 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:55,862 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 159 transitions. [2024-11-14 05:16:55,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-14 05:16:55,863 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:16:55,863 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-14 05:16:55,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 05:16:56,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:16:56,068 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:16:56,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:16:56,068 INFO L85 PathProgramCache]: Analyzing trace with hash -578901549, now seen corresponding path program 3 times [2024-11-14 05:16:56,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:16:56,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019238183] [2024-11-14 05:16:56,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:16:56,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:16:56,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:16:56,343 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:16:56,343 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:16:56,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019238183] [2024-11-14 05:16:56,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019238183] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:16:56,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105614999] [2024-11-14 05:16:56,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:16:56,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:16:56,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:16:56,346 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:16:56,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 05:16:56,447 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:16:56,447 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:16:56,449 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-14 05:16:56,451 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:16:56,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-14 05:16:56,463 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 [2024-11-14 05:16:56,635 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:16:56,635 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:16:56,943 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:16:56,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105614999] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:16:56,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1805384518] [2024-11-14 05:16:56,944 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:16:56,944 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:16:56,945 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:16:56,945 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:16:56,945 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:16:57,693 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:16:58,500 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2671#true' at error location [2024-11-14 05:16:58,500 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:16:58,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:16:58,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2024-11-14 05:16:58,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600378177] [2024-11-14 05:16:58,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:16:58,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-14 05:16:58,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:16:58,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-14 05:16:58,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2024-11-14 05:16:58,502 INFO L87 Difference]: Start difference. First operand 135 states and 159 transitions. Second operand has 24 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:58,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:16:58,739 INFO L93 Difference]: Finished difference Result 169 states and 196 transitions. [2024-11-14 05:16:58,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 05:16:58,740 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-11-14 05:16:58,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:16:58,741 INFO L225 Difference]: With dead ends: 169 [2024-11-14 05:16:58,741 INFO L226 Difference]: Without dead ends: 169 [2024-11-14 05:16:58,741 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=132, Invalid=1128, Unknown=0, NotChecked=0, Total=1260 [2024-11-14 05:16:58,741 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 14 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:16:58,742 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 142 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:16:58,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-11-14 05:16:58,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 167. [2024-11-14 05:16:58,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 165 states have (on average 1.187878787878788) internal successors, (196), 166 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:58,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 196 transitions. [2024-11-14 05:16:58,756 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 196 transitions. Word has length 23 [2024-11-14 05:16:58,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:16:58,756 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 196 transitions. [2024-11-14 05:16:58,756 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:16:58,756 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 196 transitions. [2024-11-14 05:16:58,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-14 05:16:58,757 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:16:58,757 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:16:58,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 05:16:58,957 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:16:58,958 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:16:58,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:16:58,958 INFO L85 PathProgramCache]: Analyzing trace with hash -334117706, now seen corresponding path program 4 times [2024-11-14 05:16:58,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:16:58,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589815564] [2024-11-14 05:16:58,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:16:58,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:16:58,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:16:59,343 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:16:59,344 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:16:59,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589815564] [2024-11-14 05:16:59,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589815564] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:16:59,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800644393] [2024-11-14 05:16:59,344 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:16:59,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:16:59,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:16:59,346 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:16:59,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 05:16:59,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:16:59,449 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-14 05:16:59,451 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:16:59,458 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 10 treesize of output 8 [2024-11-14 05:16:59,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-14 05:16:59,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2024-11-14 05:17:00,394 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 05:17:00,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 10 [2024-11-14 05:17:00,431 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:17:00,431 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:17:02,703 WARN L851 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~nondetString2~0#1.offset| Int)) (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |ULTIMATE.start_main_~nondetString2~0#1.offset| |c_ULTIMATE.start_main_~length2~0#1|) 0))) (= (select .cse0 (+ |ULTIMATE.start_main_~nondetString2~0#1.offset| 2)) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| .cse0) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)))) is different from false [2024-11-14 05:17:02,751 INFO L349 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2024-11-14 05:17:02,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 170 treesize of output 146 [2024-11-14 05:17:02,767 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:17:02,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 146 treesize of output 142 [2024-11-14 05:17:02,875 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:17:02,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2024-11-14 05:17:02,914 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:17:02,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 134 treesize of output 139 [2024-11-14 05:17:03,487 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:17:03,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800644393] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:17:03,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1041946675] [2024-11-14 05:17:03,489 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:17:03,489 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:17:03,489 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:17:03,489 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:17:03,489 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:17:03,992 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:17:06,188 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3364#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_84| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_84| Int)) (and (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_84|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_84|) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_84|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_84|) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|)))' at error location [2024-11-14 05:17:06,188 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:17:06,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:17:06,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 42 [2024-11-14 05:17:06,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723256351] [2024-11-14 05:17:06,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:17:06,189 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-14 05:17:06,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:17:06,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-14 05:17:06,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2709, Unknown=2, NotChecked=104, Total=2970 [2024-11-14 05:17:06,190 INFO L87 Difference]: Start difference. First operand 167 states and 196 transitions. Second operand has 43 states, 43 states have (on average 1.627906976744186) internal successors, (70), 42 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:17:08,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:17:08,504 INFO L93 Difference]: Finished difference Result 286 states and 324 transitions. [2024-11-14 05:17:08,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-14 05:17:08,505 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.627906976744186) internal successors, (70), 42 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-11-14 05:17:08,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:17:08,506 INFO L225 Difference]: With dead ends: 286 [2024-11-14 05:17:08,506 INFO L226 Difference]: Without dead ends: 237 [2024-11-14 05:17:08,508 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1462 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=330, Invalid=5992, Unknown=2, NotChecked=156, Total=6480 [2024-11-14 05:17:08,509 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 57 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 05:17:08,509 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 341 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 893 Invalid, 0 Unknown, 68 Unchecked, 0.8s Time] [2024-11-14 05:17:08,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2024-11-14 05:17:08,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 219. [2024-11-14 05:17:08,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 217 states have (on average 1.1797235023041475) internal successors, (256), 218 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:17:08,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 256 transitions. [2024-11-14 05:17:08,519 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 256 transitions. Word has length 25 [2024-11-14 05:17:08,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:17:08,519 INFO L471 AbstractCegarLoop]: Abstraction has 219 states and 256 transitions. [2024-11-14 05:17:08,520 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.627906976744186) internal successors, (70), 42 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:17:08,520 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 256 transitions. [2024-11-14 05:17:08,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-14 05:17:08,521 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:17:08,521 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:17:08,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-14 05:17:08,725 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:17:08,726 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:17:08,726 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:17:08,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1889934884, now seen corresponding path program 5 times [2024-11-14 05:17:08,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:17:08,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281511956] [2024-11-14 05:17:08,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:17:08,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:17:08,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:17:09,245 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:17:09,245 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:17:09,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281511956] [2024-11-14 05:17:09,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281511956] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:17:09,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276188050] [2024-11-14 05:17:09,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:17:09,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:17:09,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:17:09,248 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:17:09,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 05:17:09,367 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-14 05:17:09,367 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:17:09,369 INFO L255 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-14 05:17:09,371 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:17:09,810 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:17:09,810 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:17:10,113 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 7 treesize of output 5 [2024-11-14 05:17:10,195 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:17:10,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276188050] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:17:10,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2100612455] [2024-11-14 05:17:10,196 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:17:10,197 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:17:10,197 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:17:10,197 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:17:10,197 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:17:10,658 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:17:12,273 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4121#(and (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_97| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_98| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_97|) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_97|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_98|) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_98|) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))) (= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0))' at error location [2024-11-14 05:17:12,273 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:17:12,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:17:12,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2024-11-14 05:17:12,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523591901] [2024-11-14 05:17:12,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:17:12,274 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-14 05:17:12,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:17:12,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-14 05:17:12,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1728, Unknown=1, NotChecked=0, Total=1892 [2024-11-14 05:17:12,275 INFO L87 Difference]: Start difference. First operand 219 states and 256 transitions. Second operand has 32 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:17:13,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:17:13,053 INFO L93 Difference]: Finished difference Result 267 states and 307 transitions. [2024-11-14 05:17:13,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-14 05:17:13,054 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-11-14 05:17:13,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:17:13,055 INFO L225 Difference]: With dead ends: 267 [2024-11-14 05:17:13,055 INFO L226 Difference]: Without dead ends: 267 [2024-11-14 05:17:13,056 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=273, Invalid=2482, Unknown=1, NotChecked=0, Total=2756 [2024-11-14 05:17:13,057 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 76 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:17:13,058 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 273 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 05:17:13,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2024-11-14 05:17:13,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 239. [2024-11-14 05:17:13,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 237 states have (on average 1.1814345991561181) internal successors, (280), 238 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:17:13,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 280 transitions. [2024-11-14 05:17:13,066 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 280 transitions. Word has length 27 [2024-11-14 05:17:13,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:17:13,067 INFO L471 AbstractCegarLoop]: Abstraction has 239 states and 280 transitions. [2024-11-14 05:17:13,067 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:17:13,067 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 280 transitions. [2024-11-14 05:17:13,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-14 05:17:13,068 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:17:13,068 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-14 05:17:13,088 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-14 05:17:13,273 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:17:13,273 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:17:13,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:17:13,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1142421320, now seen corresponding path program 4 times [2024-11-14 05:17:13,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:17:13,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23711381] [2024-11-14 05:17:13,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:17:13,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:17:13,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:17:13,817 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:17:13,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:17:13,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23711381] [2024-11-14 05:17:13,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23711381] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:17:13,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341690768] [2024-11-14 05:17:13,817 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:17:13,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:17:13,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:17:13,819 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:17:13,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 05:17:13,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:17:13,912 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-14 05:17:13,915 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:17:13,920 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 18 treesize of output 16 [2024-11-14 05:17:14,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 05:17:14,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 05:17:14,157 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:17:14,158 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:17:14,197 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_314 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_314) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2024-11-14 05:17:14,204 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:17:14,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 23 treesize of output 24 [2024-11-14 05:17:14,212 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:17:14,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2024-11-14 05:17:14,314 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:17:14,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341690768] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:17:14,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [752535653] [2024-11-14 05:17:14,315 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:17:14,315 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:17:14,316 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:17:14,316 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:17:14,316 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:17:15,539 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:17:16,595 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4657#true' at error location [2024-11-14 05:17:16,595 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:17:16,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:17:16,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 24 [2024-11-14 05:17:16,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955822171] [2024-11-14 05:17:16,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:17:16,596 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-14 05:17:16,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:17:16,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-14 05:17:16,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1032, Unknown=1, NotChecked=64, Total=1190 [2024-11-14 05:17:16,597 INFO L87 Difference]: Start difference. First operand 239 states and 280 transitions. Second operand has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:17:16,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:17:16,904 INFO L93 Difference]: Finished difference Result 410 states and 467 transitions. [2024-11-14 05:17:16,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-14 05:17:16,907 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2024-11-14 05:17:16,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:17:16,909 INFO L225 Difference]: With dead ends: 410 [2024-11-14 05:17:16,909 INFO L226 Difference]: Without dead ends: 314 [2024-11-14 05:17:16,909 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=112, Invalid=1223, Unknown=1, NotChecked=70, Total=1406 [2024-11-14 05:17:16,910 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 14 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:17:16,910 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 251 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 389 Invalid, 0 Unknown, 45 Unchecked, 0.2s Time] [2024-11-14 05:17:16,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2024-11-14 05:17:16,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 270. [2024-11-14 05:17:16,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 268 states have (on average 1.1865671641791045) internal successors, (318), 269 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:17:16,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 318 transitions. [2024-11-14 05:17:16,925 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 318 transitions. Word has length 29 [2024-11-14 05:17:16,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:17:16,925 INFO L471 AbstractCegarLoop]: Abstraction has 270 states and 318 transitions. [2024-11-14 05:17:16,925 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:17:16,925 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 318 transitions. [2024-11-14 05:17:16,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-14 05:17:16,926 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:17:16,926 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2024-11-14 05:17:16,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-14 05:17:17,126 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-14 05:17:17,127 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:17:17,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:17:17,127 INFO L85 PathProgramCache]: Analyzing trace with hash 544998752, now seen corresponding path program 5 times [2024-11-14 05:17:17,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:17:17,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599563948] [2024-11-14 05:17:17,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:17:17,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:17:17,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:17:17,553 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:17:17,553 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:17:17,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599563948] [2024-11-14 05:17:17,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599563948] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:17:17,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90054374] [2024-11-14 05:17:17,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:17:17,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:17:17,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:17:17,556 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:17:17,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 05:17:17,686 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-14 05:17:17,687 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:17:17,689 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-14 05:17:17,691 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:17:18,131 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:17:18,132 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:17:18,466 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 7 treesize of output 5 [2024-11-14 05:17:18,563 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:17:18,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90054374] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:17:18,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1596767768] [2024-11-14 05:17:18,565 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:17:18,565 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:17:18,565 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:17:18,565 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:17:18,565 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:17:19,687 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:17:20,819 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5547#true' at error location [2024-11-14 05:17:20,819 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:17:20,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:17:20,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2024-11-14 05:17:20,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27212441] [2024-11-14 05:17:20,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:17:20,820 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-14 05:17:20,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:17:20,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-14 05:17:20,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1487, Unknown=0, NotChecked=0, Total=1640 [2024-11-14 05:17:20,821 INFO L87 Difference]: Start difference. First operand 270 states and 318 transitions. Second operand has 31 states, 30 states have (on average 2.8) internal successors, (84), 30 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:17:21,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:17:21,294 INFO L93 Difference]: Finished difference Result 323 states and 376 transitions. [2024-11-14 05:17:21,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-14 05:17:21,295 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.8) internal successors, (84), 30 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2024-11-14 05:17:21,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:17:21,296 INFO L225 Difference]: With dead ends: 323 [2024-11-14 05:17:21,296 INFO L226 Difference]: Without dead ends: 323 [2024-11-14 05:17:21,297 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=196, Invalid=1784, Unknown=0, NotChecked=0, Total=1980 [2024-11-14 05:17:21,297 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 21 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:17:21,298 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 218 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 05:17:21,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2024-11-14 05:17:21,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 320. [2024-11-14 05:17:21,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 318 states have (on average 1.1823899371069182) internal successors, (376), 319 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:17:21,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 376 transitions. [2024-11-14 05:17:21,308 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 376 transitions. Word has length 31 [2024-11-14 05:17:21,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:17:21,308 INFO L471 AbstractCegarLoop]: Abstraction has 320 states and 376 transitions. [2024-11-14 05:17:21,309 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.8) internal successors, (84), 30 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:17:21,309 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 376 transitions. [2024-11-14 05:17:21,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-14 05:17:21,310 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:17:21,310 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:17:21,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-14 05:17:21,513 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-14 05:17:21,514 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:17:21,514 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:17:21,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1420195359, now seen corresponding path program 6 times [2024-11-14 05:17:21,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:17:21,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022594965] [2024-11-14 05:17:21,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:17:21,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:17:21,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:17:22,003 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:17:22,003 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:17:22,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022594965] [2024-11-14 05:17:22,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022594965] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:17:22,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118983818] [2024-11-14 05:17:22,003 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:17:22,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:17:22,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:17:22,006 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:17:22,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 05:17:22,131 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:17:22,131 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:17:22,133 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-14 05:17:22,135 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:17:22,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 9 [2024-11-14 05:17:22,433 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:17:22,433 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:17:22,482 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 15 treesize of output 13 [2024-11-14 05:17:22,485 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 16 treesize of output 12 [2024-11-14 05:17:22,587 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:17:22,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118983818] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:17:22,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [253375100] [2024-11-14 05:17:22,588 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:17:22,588 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:17:22,588 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:17:22,588 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:17:22,588 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:17:23,222 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:17:24,982 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6626#(and (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_134| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_133| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_133|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_134|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_134|) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_133|) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0))' at error location [2024-11-14 05:17:24,982 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:17:24,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:17:24,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 27 [2024-11-14 05:17:24,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419010152] [2024-11-14 05:17:24,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:17:24,983 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-14 05:17:24,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:17:24,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-14 05:17:24,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1365, Unknown=1, NotChecked=0, Total=1482 [2024-11-14 05:17:24,984 INFO L87 Difference]: Start difference. First operand 320 states and 376 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:17:25,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:17:25,730 INFO L93 Difference]: Finished difference Result 508 states and 585 transitions. [2024-11-14 05:17:25,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-14 05:17:25,730 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2024-11-14 05:17:25,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:17:25,732 INFO L225 Difference]: With dead ends: 508 [2024-11-14 05:17:25,732 INFO L226 Difference]: Without dead ends: 436 [2024-11-14 05:17:25,733 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=187, Invalid=2262, Unknown=1, NotChecked=0, Total=2450 [2024-11-14 05:17:25,733 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 68 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:17:25,734 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 412 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 05:17:25,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2024-11-14 05:17:25,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 404. [2024-11-14 05:17:25,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 402 states have (on average 1.1791044776119404) internal successors, (474), 403 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:17:25,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 474 transitions. [2024-11-14 05:17:25,755 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 474 transitions. Word has length 31 [2024-11-14 05:17:25,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:17:25,756 INFO L471 AbstractCegarLoop]: Abstraction has 404 states and 474 transitions. [2024-11-14 05:17:25,756 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:17:25,756 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 474 transitions. [2024-11-14 05:17:25,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-14 05:17:25,757 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:17:25,757 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:17:25,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-14 05:17:25,958 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-14 05:17:25,958 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:17:25,959 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:17:25,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1165970809, now seen corresponding path program 7 times [2024-11-14 05:17:25,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:17:25,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744568295] [2024-11-14 05:17:25,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:17:25,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:17:25,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:17:26,601 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:17:26,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:17:26,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744568295] [2024-11-14 05:17:26,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744568295] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:17:26,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475924922] [2024-11-14 05:17:26,601 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:17:26,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:17:26,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:17:26,604 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:17:26,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 05:17:26,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:17:26,723 INFO L255 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-14 05:17:26,724 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:17:27,108 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:17:27,108 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:17:27,591 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 [2024-11-14 05:17:27,744 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:17:27,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475924922] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:17:27,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1595422447] [2024-11-14 05:17:27,745 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:17:27,746 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:17:27,746 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:17:27,746 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:17:27,746 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:17:28,441 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:17:30,170 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7796#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_148| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_150| Int)) (and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_148|) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_148|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_150|) (= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_150|) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|)))' at error location [2024-11-14 05:17:30,171 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:17:30,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:17:30,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2024-11-14 05:17:30,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940651618] [2024-11-14 05:17:30,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:17:30,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-14 05:17:30,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:17:30,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-14 05:17:30,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1740, Unknown=1, NotChecked=0, Total=1892 [2024-11-14 05:17:30,173 INFO L87 Difference]: Start difference. First operand 404 states and 474 transitions. Second operand has 32 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:17:31,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:17:31,322 INFO L93 Difference]: Finished difference Result 485 states and 560 transitions. [2024-11-14 05:17:31,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-14 05:17:31,322 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2024-11-14 05:17:31,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:17:31,325 INFO L225 Difference]: With dead ends: 485 [2024-11-14 05:17:31,325 INFO L226 Difference]: Without dead ends: 485 [2024-11-14 05:17:31,326 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=263, Invalid=2706, Unknown=1, NotChecked=0, Total=2970 [2024-11-14 05:17:31,327 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 98 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 05:17:31,327 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 396 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 05:17:31,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2024-11-14 05:17:31,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 432. [2024-11-14 05:17:31,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 430 states have (on average 1.1813953488372093) internal successors, (508), 431 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:17:31,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 508 transitions. [2024-11-14 05:17:31,342 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 508 transitions. Word has length 33 [2024-11-14 05:17:31,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:17:31,342 INFO L471 AbstractCegarLoop]: Abstraction has 432 states and 508 transitions. [2024-11-14 05:17:31,343 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:17:31,343 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 508 transitions. [2024-11-14 05:17:31,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-14 05:17:31,344 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:17:31,344 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2024-11-14 05:17:31,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-14 05:17:31,547 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-14 05:17:31,548 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:17:31,548 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:17:31,548 INFO L85 PathProgramCache]: Analyzing trace with hash 117687941, now seen corresponding path program 6 times [2024-11-14 05:17:31,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:17:31,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531923099] [2024-11-14 05:17:31,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:17:31,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:17:31,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:17:32,327 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:17:32,327 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:17:32,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531923099] [2024-11-14 05:17:32,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531923099] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:17:32,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730881657] [2024-11-14 05:17:32,328 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:17:32,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:17:32,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:17:32,331 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:17:32,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-14 05:17:32,489 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:17:32,489 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:17:32,492 INFO L255 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-11-14 05:17:32,495 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:17:32,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2024-11-14 05:17:32,947 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-11-14 05:17:32,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2024-11-14 05:17:33,856 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:17:33,856 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:17:34,416 INFO L349 Elim1Store]: treesize reduction 36, result has 45.5 percent of original size [2024-11-14 05:17:34,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 110 treesize of output 118 [2024-11-14 05:17:34,431 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:17:34,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 42 [2024-11-14 05:17:34,442 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 05:17:34,442 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 05:17:34,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 11 [2024-11-14 05:17:34,472 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 05:17:34,476 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 05:17:34,498 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:17:34,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 59 [2024-11-14 05:17:34,972 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 14 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:17:34,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730881657] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:17:34,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [104979459] [2024-11-14 05:17:34,974 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:17:34,974 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:17:34,974 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:17:34,974 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:17:34,974 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:17:35,816 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:17:38,052 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9010#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post2#1.base_93| Int) (|v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_94| Int)) (and (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_94|) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (or (and (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (= |ULTIMATE.start_cstrcspn_~spanp~0#1.offset| 1) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0)) (and (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (= |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_94| 0))) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post2#1.base_93|) |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_94|)))' at error location [2024-11-14 05:17:38,052 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:17:38,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:17:38,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20, 20] total 46 [2024-11-14 05:17:38,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410039288] [2024-11-14 05:17:38,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:17:38,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-14 05:17:38,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:17:38,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-14 05:17:38,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=3209, Unknown=0, NotChecked=0, Total=3422 [2024-11-14 05:17:38,055 INFO L87 Difference]: Start difference. First operand 432 states and 508 transitions. Second operand has 47 states, 47 states have (on average 1.8085106382978724) internal successors, (85), 46 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:17:39,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:17:39,540 INFO L93 Difference]: Finished difference Result 894 states and 1027 transitions. [2024-11-14 05:17:39,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-14 05:17:39,541 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.8085106382978724) internal successors, (85), 46 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2024-11-14 05:17:39,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:17:39,543 INFO L225 Difference]: With dead ends: 894 [2024-11-14 05:17:39,544 INFO L226 Difference]: Without dead ends: 604 [2024-11-14 05:17:39,545 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=284, Invalid=4408, Unknown=0, NotChecked=0, Total=4692 [2024-11-14 05:17:39,545 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 29 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 05:17:39,546 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 340 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 841 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 05:17:39,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2024-11-14 05:17:39,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 469. [2024-11-14 05:17:39,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 467 states have (on average 1.1841541755888652) internal successors, (553), 468 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:17:39,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 553 transitions. [2024-11-14 05:17:39,563 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 553 transitions. Word has length 37 [2024-11-14 05:17:39,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:17:39,563 INFO L471 AbstractCegarLoop]: Abstraction has 469 states and 553 transitions. [2024-11-14 05:17:39,563 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.8085106382978724) internal successors, (85), 46 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:17:39,563 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 553 transitions. [2024-11-14 05:17:39,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-14 05:17:39,564 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:17:39,564 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:17:39,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-14 05:17:39,767 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-14 05:17:39,768 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:17:39,769 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:17:39,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1342311692, now seen corresponding path program 8 times [2024-11-14 05:17:39,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:17:39,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891757041] [2024-11-14 05:17:39,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:17:39,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:17:39,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:17:40,437 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:17:40,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:17:40,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891757041] [2024-11-14 05:17:40,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891757041] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:17:40,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152420675] [2024-11-14 05:17:40,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:17:40,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:17:40,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:17:40,441 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:17:40,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-14 05:17:40,584 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-14 05:17:40,584 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:17:40,592 INFO L255 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-11-14 05:17:40,594 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:17:40,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 9 [2024-11-14 05:17:40,952 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:17:40,952 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:17:41,007 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 15 treesize of output 13 [2024-11-14 05:17:41,010 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 16 treesize of output 12 [2024-11-14 05:17:41,115 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:17:41,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152420675] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:17:41,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2002488285] [2024-11-14 05:17:41,117 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:17:41,117 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:17:41,117 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:17:41,117 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:17:41,117 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:17:41,730 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:17:43,511 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10651#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_180| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_182| Int)) (and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_180|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_182|) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_182|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_180|) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|)))' at error location [2024-11-14 05:17:43,511 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:17:43,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:17:43,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 30 [2024-11-14 05:17:43,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113356598] [2024-11-14 05:17:43,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:17:43,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-14 05:17:43,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:17:43,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-14 05:17:43,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1597, Unknown=1, NotChecked=0, Total=1722 [2024-11-14 05:17:43,513 INFO L87 Difference]: Start difference. First operand 469 states and 553 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:17:44,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:17:44,429 INFO L93 Difference]: Finished difference Result 733 states and 849 transitions. [2024-11-14 05:17:44,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-14 05:17:44,430 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2024-11-14 05:17:44,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:17:44,432 INFO L225 Difference]: With dead ends: 733 [2024-11-14 05:17:44,432 INFO L226 Difference]: Without dead ends: 613 [2024-11-14 05:17:44,433 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=207, Invalid=2762, Unknown=1, NotChecked=0, Total=2970 [2024-11-14 05:17:44,434 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 85 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:17:44,435 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 460 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 05:17:44,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2024-11-14 05:17:44,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 571. [2024-11-14 05:17:44,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 569 states have (on average 1.1827768014059754) internal successors, (673), 570 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:17:44,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 673 transitions. [2024-11-14 05:17:44,452 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 673 transitions. Word has length 37 [2024-11-14 05:17:44,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:17:44,452 INFO L471 AbstractCegarLoop]: Abstraction has 571 states and 673 transitions. [2024-11-14 05:17:44,452 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:17:44,453 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 673 transitions. [2024-11-14 05:17:44,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-14 05:17:44,454 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:17:44,454 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2024-11-14 05:17:44,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-14 05:17:44,655 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-14 05:17:44,655 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:17:44,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:17:44,655 INFO L85 PathProgramCache]: Analyzing trace with hash -758867155, now seen corresponding path program 7 times [2024-11-14 05:17:44,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:17:44,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923854205] [2024-11-14 05:17:44,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:17:44,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:17:44,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:17:45,186 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:17:45,186 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:17:45,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923854205] [2024-11-14 05:17:45,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923854205] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:17:45,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336485575] [2024-11-14 05:17:45,186 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:17:45,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:17:45,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:17:45,188 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:17:45,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-14 05:17:45,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:17:45,299 INFO L255 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-14 05:17:45,301 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:17:45,686 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:17:45,686 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:17:46,088 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 [2024-11-14 05:17:46,189 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:17:46,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336485575] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:17:46,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [611495741] [2024-11-14 05:17:46,191 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:17:46,191 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:17:46,191 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:17:46,191 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:17:46,191 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:17:47,005 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:17:48,633 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12252#(and (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrcspn_#t~post2#1.base_107| Int) (|v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_109| Int)) (and (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_109|) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post2#1.base_107|) |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_109|))))' at error location [2024-11-14 05:17:48,633 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:17:48,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:17:48,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2024-11-14 05:17:48,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421562171] [2024-11-14 05:17:48,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:17:48,634 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-14 05:17:48,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:17:48,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-14 05:17:48,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1656, Unknown=0, NotChecked=0, Total=1806 [2024-11-14 05:17:48,635 INFO L87 Difference]: Start difference. First operand 571 states and 673 transitions. Second operand has 31 states, 30 states have (on average 2.7333333333333334) internal successors, (82), 30 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:17:49,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:17:49,458 INFO L93 Difference]: Finished difference Result 669 states and 783 transitions. [2024-11-14 05:17:49,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-14 05:17:49,459 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.7333333333333334) internal successors, (82), 30 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2024-11-14 05:17:49,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:17:49,462 INFO L225 Difference]: With dead ends: 669 [2024-11-14 05:17:49,462 INFO L226 Difference]: Without dead ends: 669 [2024-11-14 05:17:49,465 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 82 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=191, Invalid=2065, Unknown=0, NotChecked=0, Total=2256 [2024-11-14 05:17:49,469 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 25 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 05:17:49,470 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 346 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 05:17:49,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2024-11-14 05:17:49,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 665. [2024-11-14 05:17:49,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 663 states have (on average 1.1809954751131222) internal successors, (783), 664 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:17:49,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 783 transitions. [2024-11-14 05:17:49,497 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 783 transitions. Word has length 39 [2024-11-14 05:17:49,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:17:49,498 INFO L471 AbstractCegarLoop]: Abstraction has 665 states and 783 transitions. [2024-11-14 05:17:49,498 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.7333333333333334) internal successors, (82), 30 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:17:49,498 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 783 transitions. [2024-11-14 05:17:49,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-14 05:17:49,499 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:17:49,499 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:17:49,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-14 05:17:49,700 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-14 05:17:49,700 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:17:49,700 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:17:49,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1819648306, now seen corresponding path program 9 times [2024-11-14 05:17:49,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:17:49,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119827837] [2024-11-14 05:17:49,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:17:49,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:17:49,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:17:50,359 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 9 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:17:50,359 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:17:50,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119827837] [2024-11-14 05:17:50,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119827837] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:17:50,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307752111] [2024-11-14 05:17:50,359 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:17:50,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:17:50,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:17:50,363 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:17:50,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-14 05:17:50,483 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:17:50,483 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:17:50,485 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-11-14 05:17:50,487 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:17:50,856 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 16 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:17:50,856 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:17:51,234 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 21 treesize of output 17 [2024-11-14 05:17:51,601 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 16 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:17:51,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307752111] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:17:51,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1624367732] [2024-11-14 05:17:51,602 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:17:51,602 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:17:51,603 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:17:51,603 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:17:51,603 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:17:52,104 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:17:54,200 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13878#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_212| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_210| Int)) (and (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_210|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_212|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_210|) (= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_212|) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|)))' at error location [2024-11-14 05:17:54,200 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:17:54,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:17:54,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2024-11-14 05:17:54,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443014027] [2024-11-14 05:17:54,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:17:54,201 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-14 05:17:54,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:17:54,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-14 05:17:54,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=2579, Unknown=1, NotChecked=0, Total=2862 [2024-11-14 05:17:54,203 INFO L87 Difference]: Start difference. First operand 665 states and 783 transitions. Second operand has 42 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 41 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:17:55,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:17:55,401 INFO L93 Difference]: Finished difference Result 787 states and 912 transitions. [2024-11-14 05:17:55,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-14 05:17:55,401 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 41 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2024-11-14 05:17:55,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:17:55,404 INFO L225 Difference]: With dead ends: 787 [2024-11-14 05:17:55,404 INFO L226 Difference]: Without dead ends: 787 [2024-11-14 05:17:55,405 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1400 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=425, Invalid=3996, Unknown=1, NotChecked=0, Total=4422 [2024-11-14 05:17:55,406 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 117 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 05:17:55,406 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 421 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 05:17:55,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2024-11-14 05:17:55,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 701. [2024-11-14 05:17:55,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 699 states have (on average 1.1831187410586552) internal successors, (827), 700 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:17:55,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 827 transitions. [2024-11-14 05:17:55,429 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 827 transitions. Word has length 39 [2024-11-14 05:17:55,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:17:55,430 INFO L471 AbstractCegarLoop]: Abstraction has 701 states and 827 transitions. [2024-11-14 05:17:55,430 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 41 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:17:55,430 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 827 transitions. [2024-11-14 05:17:55,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-14 05:17:55,431 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:17:55,432 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:17:55,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-14 05:17:55,632 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:17:55,632 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:17:55,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:17:55,633 INFO L85 PathProgramCache]: Analyzing trace with hash 188329527, now seen corresponding path program 10 times [2024-11-14 05:17:55,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:17:55,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434980741] [2024-11-14 05:17:55,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:17:55,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:17:55,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:17:56,212 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:17:56,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:17:56,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434980741] [2024-11-14 05:17:56,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434980741] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:17:56,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611036488] [2024-11-14 05:17:56,213 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:17:56,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:17:56,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:17:56,214 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:17:56,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-14 05:17:56,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:17:56,328 INFO L255 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-11-14 05:17:56,329 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:17:56,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 9 [2024-11-14 05:17:56,613 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:17:56,613 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:17:56,669 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 15 treesize of output 13 [2024-11-14 05:17:56,671 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 16 treesize of output 12 [2024-11-14 05:17:56,752 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:17:56,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611036488] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:17:56,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [635012464] [2024-11-14 05:17:56,753 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:17:56,753 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:17:56,753 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:17:56,754 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:17:56,754 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:17:57,270 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:17:59,459 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15689#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_232| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_230| Int)) (and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_232|) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_230|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_232|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_230|) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|)))' at error location [2024-11-14 05:17:59,459 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:17:59,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:17:59,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 33 [2024-11-14 05:17:59,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166056764] [2024-11-14 05:17:59,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:17:59,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-14 05:17:59,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:17:59,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-14 05:17:59,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1847, Unknown=1, NotChecked=0, Total=1980 [2024-11-14 05:17:59,461 INFO L87 Difference]: Start difference. First operand 701 states and 827 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:18:00,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:18:00,848 INFO L93 Difference]: Finished difference Result 1048 states and 1218 transitions. [2024-11-14 05:18:00,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-14 05:18:00,849 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2024-11-14 05:18:00,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:18:00,852 INFO L225 Difference]: With dead ends: 1048 [2024-11-14 05:18:00,852 INFO L226 Difference]: Without dead ends: 906 [2024-11-14 05:18:00,853 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=227, Invalid=3312, Unknown=1, NotChecked=0, Total=3540 [2024-11-14 05:18:00,853 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 64 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 05:18:00,853 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 650 Invalid, 932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 927 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 05:18:00,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2024-11-14 05:18:00,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 845. [2024-11-14 05:18:00,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 843 states have (on average 1.1838671411625148) internal successors, (998), 844 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:18:00,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 998 transitions. [2024-11-14 05:18:00,876 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 998 transitions. Word has length 43 [2024-11-14 05:18:00,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:18:00,876 INFO L471 AbstractCegarLoop]: Abstraction has 845 states and 998 transitions. [2024-11-14 05:18:00,876 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:18:00,876 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 998 transitions. [2024-11-14 05:18:00,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-14 05:18:00,878 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:18:00,878 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2024-11-14 05:18:00,904 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-14 05:18:01,079 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:18:01,079 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:18:01,080 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:18:01,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1076235922, now seen corresponding path program 8 times [2024-11-14 05:18:01,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:18:01,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067424129] [2024-11-14 05:18:01,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:18:01,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:18:01,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:18:01,838 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 10 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:18:01,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:18:01,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067424129] [2024-11-14 05:18:01,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067424129] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:18:01,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128955645] [2024-11-14 05:18:01,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:18:01,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:18:01,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:18:01,841 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:18:01,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-14 05:18:02,017 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-14 05:18:02,017 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:18:02,020 INFO L255 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-11-14 05:18:02,022 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:18:02,028 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 10 treesize of output 8 [2024-11-14 05:18:02,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 05:18:02,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 05:18:02,476 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 10 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:18:02,477 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:18:02,550 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_606 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_606) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2024-11-14 05:18:02,558 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:18:02,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 23 treesize of output 24 [2024-11-14 05:18:02,566 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:18:02,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2024-11-14 05:18:02,713 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 10 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:18:02,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128955645] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:18:02,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [897502497] [2024-11-14 05:18:02,715 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:18:02,715 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:18:02,715 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:18:02,715 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:18:02,716 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:18:03,801 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:18:05,098 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17624#true' at error location [2024-11-14 05:18:05,098 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:18:05,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:18:05,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 30 [2024-11-14 05:18:05,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11613196] [2024-11-14 05:18:05,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:18:05,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-14 05:18:05,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:18:05,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-14 05:18:05,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1456, Unknown=1, NotChecked=76, Total=1640 [2024-11-14 05:18:05,100 INFO L87 Difference]: Start difference. First operand 845 states and 998 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:18:05,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:18:05,793 INFO L93 Difference]: Finished difference Result 1500 states and 1739 transitions. [2024-11-14 05:18:05,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-14 05:18:05,793 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2024-11-14 05:18:05,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:18:05,795 INFO L225 Difference]: With dead ends: 1500 [2024-11-14 05:18:05,796 INFO L226 Difference]: Without dead ends: 1008 [2024-11-14 05:18:05,796 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=136, Invalid=1847, Unknown=1, NotChecked=86, Total=2070 [2024-11-14 05:18:05,797 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 15 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:18:05,798 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 601 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 869 Invalid, 0 Unknown, 67 Unchecked, 0.5s Time] [2024-11-14 05:18:05,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2024-11-14 05:18:05,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 890. [2024-11-14 05:18:05,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 888 states have (on average 1.1846846846846846) internal successors, (1052), 889 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:18:05,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1052 transitions. [2024-11-14 05:18:05,819 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1052 transitions. Word has length 45 [2024-11-14 05:18:05,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:18:05,819 INFO L471 AbstractCegarLoop]: Abstraction has 890 states and 1052 transitions. [2024-11-14 05:18:05,819 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:18:05,820 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1052 transitions. [2024-11-14 05:18:05,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-14 05:18:05,821 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:18:05,821 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:18:05,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-14 05:18:06,022 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:18:06,022 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:18:06,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:18:06,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1176826403, now seen corresponding path program 11 times [2024-11-14 05:18:06,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:18:06,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607464138] [2024-11-14 05:18:06,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:18:06,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:18:06,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:18:06,896 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 16 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:18:06,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:18:06,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607464138] [2024-11-14 05:18:06,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607464138] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:18:06,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501977907] [2024-11-14 05:18:06,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:18:06,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:18:06,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:18:06,899 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:18:06,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-14 05:18:07,079 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-14 05:18:07,079 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:18:07,082 INFO L255 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-14 05:18:07,085 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:18:07,710 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 25 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:18:07,710 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:18:08,350 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 7 treesize of output 5 [2024-11-14 05:18:08,560 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 25 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:18:08,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501977907] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:18:08,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1743837301] [2024-11-14 05:18:08,562 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:18:08,562 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:18:08,563 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:18:08,563 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:18:08,563 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:18:09,030 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:18:11,182 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20641#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_267| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_264| Int)) (and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_264|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_267|) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_264|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_267|) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|)))' at error location [2024-11-14 05:18:11,182 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:18:11,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:18:11,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2024-11-14 05:18:11,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232743312] [2024-11-14 05:18:11,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:18:11,182 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-14 05:18:11,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:18:11,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-14 05:18:11,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=3105, Unknown=1, NotChecked=0, Total=3422 [2024-11-14 05:18:11,183 INFO L87 Difference]: Start difference. First operand 890 states and 1052 transitions. Second operand has 47 states, 46 states have (on average 2.5869565217391304) internal successors, (119), 47 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:18:12,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:18:12,348 INFO L93 Difference]: Finished difference Result 1045 states and 1215 transitions. [2024-11-14 05:18:12,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-14 05:18:12,348 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 2.5869565217391304) internal successors, (119), 47 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2024-11-14 05:18:12,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:18:12,350 INFO L225 Difference]: With dead ends: 1045 [2024-11-14 05:18:12,350 INFO L226 Difference]: Without dead ends: 1045 [2024-11-14 05:18:12,351 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 87 SyntacticMatches, 7 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1911 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=552, Invalid=4849, Unknown=1, NotChecked=0, Total=5402 [2024-11-14 05:18:12,351 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 137 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:18:12,351 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 431 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 05:18:12,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2024-11-14 05:18:12,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 930. [2024-11-14 05:18:12,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 930 states, 928 states have (on average 1.1864224137931034) internal successors, (1101), 929 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:18:12,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 1101 transitions. [2024-11-14 05:18:12,370 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 1101 transitions. Word has length 45 [2024-11-14 05:18:12,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:18:12,371 INFO L471 AbstractCegarLoop]: Abstraction has 930 states and 1101 transitions. [2024-11-14 05:18:12,371 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 2.5869565217391304) internal successors, (119), 47 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:18:12,371 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 1101 transitions. [2024-11-14 05:18:12,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-14 05:18:12,372 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:18:12,372 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2024-11-14 05:18:12,390 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-14 05:18:12,576 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:18:12,577 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:18:12,577 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:18:12,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1153153850, now seen corresponding path program 9 times [2024-11-14 05:18:12,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:18:12,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665770379] [2024-11-14 05:18:12,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:18:12,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:18:12,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:18:13,145 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 16 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:18:13,145 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:18:13,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665770379] [2024-11-14 05:18:13,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665770379] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:18:13,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288307047] [2024-11-14 05:18:13,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:18:13,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:18:13,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:18:13,148 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:18:13,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-14 05:18:13,300 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:18:13,300 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:18:13,302 INFO L255 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-11-14 05:18:13,304 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:18:13,311 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 [2024-11-14 05:18:13,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-14 05:18:13,631 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 16 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:18:13,631 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:18:14,290 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 16 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:18:14,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288307047] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:18:14,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1390144575] [2024-11-14 05:18:14,291 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:18:14,291 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:18:14,291 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:18:14,292 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:18:14,292 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:18:15,131 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:18:16,419 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22658#true' at error location [2024-11-14 05:18:16,419 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:18:16,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:18:16,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 37 [2024-11-14 05:18:16,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452778991] [2024-11-14 05:18:16,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:18:16,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-14 05:18:16,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:18:16,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-14 05:18:16,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=2113, Unknown=0, NotChecked=0, Total=2352 [2024-11-14 05:18:16,421 INFO L87 Difference]: Start difference. First operand 930 states and 1101 transitions. Second operand has 39 states, 38 states have (on average 2.9210526315789473) internal successors, (111), 38 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:18:17,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:18:17,330 INFO L93 Difference]: Finished difference Result 1063 states and 1252 transitions. [2024-11-14 05:18:17,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-14 05:18:17,331 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.9210526315789473) internal successors, (111), 38 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2024-11-14 05:18:17,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:18:17,333 INFO L225 Difference]: With dead ends: 1063 [2024-11-14 05:18:17,333 INFO L226 Difference]: Without dead ends: 1063 [2024-11-14 05:18:17,333 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 825 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=285, Invalid=2577, Unknown=0, NotChecked=0, Total=2862 [2024-11-14 05:18:17,334 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 21 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 05:18:17,334 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 434 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 05:18:17,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2024-11-14 05:18:17,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 1058. [2024-11-14 05:18:17,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 1056 states have (on average 1.1856060606060606) internal successors, (1252), 1057 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:18:17,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 1252 transitions. [2024-11-14 05:18:17,356 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 1252 transitions. Word has length 47 [2024-11-14 05:18:17,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:18:17,357 INFO L471 AbstractCegarLoop]: Abstraction has 1058 states and 1252 transitions. [2024-11-14 05:18:17,357 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.9210526315789473) internal successors, (111), 38 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:18:17,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 1252 transitions. [2024-11-14 05:18:17,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-14 05:18:17,359 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:18:17,359 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:18:17,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-14 05:18:17,559 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:18:17,559 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:18:17,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:18:17,560 INFO L85 PathProgramCache]: Analyzing trace with hash 426954082, now seen corresponding path program 12 times [2024-11-14 05:18:17,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:18:17,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20631104] [2024-11-14 05:18:17,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:18:17,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:18:17,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:18:18,584 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:18:18,584 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:18:18,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20631104] [2024-11-14 05:18:18,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20631104] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:18:18,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078234406] [2024-11-14 05:18:18,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:18:18,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:18:18,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:18:18,588 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:18:18,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-14 05:18:18,778 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:18:18,778 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:18:18,781 INFO L255 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-11-14 05:18:18,784 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:18:19,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 9 [2024-11-14 05:18:19,176 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:18:19,176 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:18:19,262 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 15 treesize of output 13 [2024-11-14 05:18:19,265 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 16 treesize of output 12 [2024-11-14 05:18:19,402 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:18:19,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078234406] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:18:19,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [277613969] [2024-11-14 05:18:19,404 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:18:19,404 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:18:19,404 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:18:19,404 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:18:19,404 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:18:20,121 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:18:22,245 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25438#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_301| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_304| Int)) (and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_301|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_304|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_304|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_301|) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|)))' at error location [2024-11-14 05:18:22,245 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:18:22,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:18:22,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 36 [2024-11-14 05:18:22,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906533711] [2024-11-14 05:18:22,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:18:22,246 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-14 05:18:22,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:18:22,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-14 05:18:22,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2115, Unknown=1, NotChecked=0, Total=2256 [2024-11-14 05:18:22,247 INFO L87 Difference]: Start difference. First operand 1058 states and 1252 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:18:23,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:18:23,919 INFO L93 Difference]: Finished difference Result 1547 states and 1806 transitions. [2024-11-14 05:18:23,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-14 05:18:23,920 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2024-11-14 05:18:23,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:18:23,924 INFO L225 Difference]: With dead ends: 1547 [2024-11-14 05:18:23,924 INFO L226 Difference]: Without dead ends: 1339 [2024-11-14 05:18:23,925 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=247, Invalid=3912, Unknown=1, NotChecked=0, Total=4160 [2024-11-14 05:18:23,926 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 117 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 1317 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 973 SdHoareTripleChecker+Invalid, 1323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 05:18:23,926 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 973 Invalid, 1323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1317 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 05:18:23,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1339 states. [2024-11-14 05:18:23,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1339 to 1254. [2024-11-14 05:18:23,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 1252 states have (on average 1.1869009584664536) internal successors, (1486), 1253 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:18:23,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 1486 transitions. [2024-11-14 05:18:23,951 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 1486 transitions. Word has length 49 [2024-11-14 05:18:23,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:18:23,951 INFO L471 AbstractCegarLoop]: Abstraction has 1254 states and 1486 transitions. [2024-11-14 05:18:23,951 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:18:23,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 1486 transitions. [2024-11-14 05:18:23,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-14 05:18:23,953 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:18:23,953 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:18:23,977 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-14 05:18:24,154 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-14 05:18:24,154 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:18:24,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:18:24,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1218140296, now seen corresponding path program 13 times [2024-11-14 05:18:24,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:18:24,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951020244] [2024-11-14 05:18:24,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:18:24,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:18:24,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:18:25,206 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 25 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:18:25,208 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:18:25,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951020244] [2024-11-14 05:18:25,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951020244] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:18:25,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718568702] [2024-11-14 05:18:25,208 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:18:25,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:18:25,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:18:25,212 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:18:25,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-14 05:18:25,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:18:25,398 INFO L255 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 78 conjuncts are in the unsatisfiable core [2024-11-14 05:18:25,401 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:18:25,942 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 36 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:18:25,942 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:18:26,572 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 [2024-11-14 05:18:26,806 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 36 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:18:26,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718568702] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:18:26,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1369740567] [2024-11-14 05:18:26,808 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:18:26,808 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:18:26,808 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:18:26,808 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:18:26,808 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:18:27,338 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:18:29,093 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '28629#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_322| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_326| Int)) (and (<= 1 |#StackHeapBarrier|) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_322|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_326|) (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_326|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_322|) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|)))' at error location [2024-11-14 05:18:29,093 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:18:29,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:18:29,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 43 [2024-11-14 05:18:29,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634590328] [2024-11-14 05:18:29,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:18:29,094 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-14 05:18:29,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:18:29,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-14 05:18:29,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=2832, Unknown=1, NotChecked=0, Total=3080 [2024-11-14 05:18:29,095 INFO L87 Difference]: Start difference. First operand 1254 states and 1486 transitions. Second operand has 44 states, 43 states have (on average 2.488372093023256) internal successors, (107), 44 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:18:31,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:18:31,112 INFO L93 Difference]: Finished difference Result 1446 states and 1687 transitions. [2024-11-14 05:18:31,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-14 05:18:31,113 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.488372093023256) internal successors, (107), 44 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2024-11-14 05:18:31,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:18:31,116 INFO L225 Difference]: With dead ends: 1446 [2024-11-14 05:18:31,116 INFO L226 Difference]: Without dead ends: 1446 [2024-11-14 05:18:31,117 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 109 SyntacticMatches, 8 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1788 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=446, Invalid=4809, Unknown=1, NotChecked=0, Total=5256 [2024-11-14 05:18:31,117 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 119 mSDsluCounter, 783 mSDsCounter, 0 mSdLazyCounter, 1508 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 1508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:18:31,118 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 819 Invalid, 1508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1508 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-14 05:18:31,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1446 states. [2024-11-14 05:18:31,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1446 to 1298. [2024-11-14 05:18:31,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 1296 states have (on average 1.1882716049382716) internal successors, (1540), 1297 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:18:31,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 1540 transitions. [2024-11-14 05:18:31,142 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 1540 transitions. Word has length 51 [2024-11-14 05:18:31,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:18:31,142 INFO L471 AbstractCegarLoop]: Abstraction has 1298 states and 1540 transitions. [2024-11-14 05:18:31,142 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.488372093023256) internal successors, (107), 44 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:18:31,142 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 1540 transitions. [2024-11-14 05:18:31,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-14 05:18:31,144 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:18:31,144 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2024-11-14 05:18:31,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-14 05:18:31,348 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-14 05:18:31,349 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:18:31,349 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:18:31,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1812582177, now seen corresponding path program 10 times [2024-11-14 05:18:31,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:18:31,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536355646] [2024-11-14 05:18:31,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:18:31,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:18:31,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:18:32,044 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 12 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:18:32,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:18:32,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536355646] [2024-11-14 05:18:32,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536355646] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:18:32,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352116632] [2024-11-14 05:18:32,044 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:18:32,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:18:32,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:18:32,046 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:18:32,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-14 05:18:32,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:18:32,198 INFO L255 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-11-14 05:18:32,200 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:18:32,205 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 18 treesize of output 16 [2024-11-14 05:18:32,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 05:18:32,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 05:18:32,622 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 12 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:18:32,623 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:18:32,686 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_808 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_808) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 5 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2024-11-14 05:18:32,692 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:18:32,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 23 treesize of output 24 [2024-11-14 05:18:32,698 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:18:32,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2024-11-14 05:18:32,821 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 12 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:18:32,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352116632] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:18:32,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1540865083] [2024-11-14 05:18:32,822 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:18:32,822 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:18:32,822 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:18:32,822 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:18:32,822 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:18:33,762 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:18:34,952 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '31419#true' at error location [2024-11-14 05:18:34,952 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:18:34,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:18:34,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 33 [2024-11-14 05:18:34,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809570302] [2024-11-14 05:18:34,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:18:34,952 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-14 05:18:34,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:18:34,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-14 05:18:34,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1695, Unknown=1, NotChecked=82, Total=1892 [2024-11-14 05:18:34,953 INFO L87 Difference]: Start difference. First operand 1298 states and 1540 transitions. Second operand has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:18:35,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:18:35,763 INFO L93 Difference]: Finished difference Result 2310 states and 2699 transitions. [2024-11-14 05:18:35,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-14 05:18:35,763 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2024-11-14 05:18:35,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:18:35,769 INFO L225 Difference]: With dead ends: 2310 [2024-11-14 05:18:35,769 INFO L226 Difference]: Without dead ends: 1540 [2024-11-14 05:18:35,769 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=148, Invalid=2207, Unknown=1, NotChecked=94, Total=2450 [2024-11-14 05:18:35,770 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 18 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 1095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 05:18:35,770 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 705 Invalid, 1095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1012 Invalid, 0 Unknown, 78 Unchecked, 0.6s Time] [2024-11-14 05:18:35,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1540 states. [2024-11-14 05:18:35,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1540 to 1353. [2024-11-14 05:18:35,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1353 states, 1351 states have (on average 1.1887490747594374) internal successors, (1606), 1352 states have internal predecessors, (1606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:18:35,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1353 states to 1353 states and 1606 transitions. [2024-11-14 05:18:35,795 INFO L78 Accepts]: Start accepts. Automaton has 1353 states and 1606 transitions. Word has length 53 [2024-11-14 05:18:35,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:18:35,795 INFO L471 AbstractCegarLoop]: Abstraction has 1353 states and 1606 transitions. [2024-11-14 05:18:35,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:18:35,795 INFO L276 IsEmpty]: Start isEmpty. Operand 1353 states and 1606 transitions. [2024-11-14 05:18:35,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-14 05:18:35,797 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:18:35,797 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2024-11-14 05:18:35,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-14 05:18:35,997 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-14 05:18:35,998 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:18:35,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:18:35,999 INFO L85 PathProgramCache]: Analyzing trace with hash 2064168327, now seen corresponding path program 11 times [2024-11-14 05:18:35,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:18:35,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166396696] [2024-11-14 05:18:35,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:18:35,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:18:36,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:18:36,487 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 25 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:18:36,487 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:18:36,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166396696] [2024-11-14 05:18:36,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166396696] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:18:36,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278558744] [2024-11-14 05:18:36,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:18:36,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:18:36,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:18:36,489 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:18:36,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-14 05:18:36,719 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-14 05:18:36,719 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:18:36,722 INFO L255 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-14 05:18:36,723 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:18:37,225 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 25 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:18:37,225 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:18:37,772 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 7 treesize of output 5 [2024-11-14 05:18:37,944 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 25 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:18:37,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278558744] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:18:37,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [743051848] [2024-11-14 05:18:37,945 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:18:37,946 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:18:37,946 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:18:37,946 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:18:37,946 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:18:38,885 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:18:40,295 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '35451#true' at error location [2024-11-14 05:18:40,295 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:18:40,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:18:40,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 44 [2024-11-14 05:18:40,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775008997] [2024-11-14 05:18:40,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:18:40,296 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-14 05:18:40,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:18:40,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-14 05:18:40,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=2774, Unknown=0, NotChecked=0, Total=3080 [2024-11-14 05:18:40,297 INFO L87 Difference]: Start difference. First operand 1353 states and 1606 transitions. Second operand has 46 states, 45 states have (on average 3.3333333333333335) internal successors, (150), 45 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:18:41,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:18:41,093 INFO L93 Difference]: Finished difference Result 1521 states and 1798 transitions. [2024-11-14 05:18:41,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-14 05:18:41,093 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 3.3333333333333335) internal successors, (150), 45 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2024-11-14 05:18:41,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:18:41,097 INFO L225 Difference]: With dead ends: 1521 [2024-11-14 05:18:41,097 INFO L226 Difference]: Without dead ends: 1521 [2024-11-14 05:18:41,097 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 119 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1434 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=406, Invalid=3500, Unknown=0, NotChecked=0, Total=3906 [2024-11-14 05:18:41,097 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 43 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:18:41,098 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 433 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 766 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 05:18:41,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1521 states. [2024-11-14 05:18:41,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1521 to 1515. [2024-11-14 05:18:41,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1515 states, 1513 states have (on average 1.1883674818241903) internal successors, (1798), 1514 states have internal predecessors, (1798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:18:41,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1515 states to 1515 states and 1798 transitions. [2024-11-14 05:18:41,115 INFO L78 Accepts]: Start accepts. Automaton has 1515 states and 1798 transitions. Word has length 55 [2024-11-14 05:18:41,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:18:41,116 INFO L471 AbstractCegarLoop]: Abstraction has 1515 states and 1798 transitions. [2024-11-14 05:18:41,116 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 3.3333333333333335) internal successors, (150), 45 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:18:41,116 INFO L276 IsEmpty]: Start isEmpty. Operand 1515 states and 1798 transitions. [2024-11-14 05:18:41,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-14 05:18:41,118 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:18:41,118 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:18:41,144 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-14 05:18:41,318 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-14 05:18:41,319 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:18:41,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:18:41,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1684523661, now seen corresponding path program 14 times [2024-11-14 05:18:41,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:18:41,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14454635] [2024-11-14 05:18:41,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:18:41,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:18:41,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:18:42,007 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:18:42,007 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:18:42,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14454635] [2024-11-14 05:18:42,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14454635] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:18:42,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609797672] [2024-11-14 05:18:42,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:18:42,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:18:42,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:18:42,009 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:18:42,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-14 05:18:42,212 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-14 05:18:42,213 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:18:42,215 INFO L255 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 90 conjuncts are in the unsatisfiable core [2024-11-14 05:18:42,217 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:18:42,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 9 [2024-11-14 05:18:42,610 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:18:42,611 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:18:42,677 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 15 treesize of output 13 [2024-11-14 05:18:42,679 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 16 treesize of output 12 [2024-11-14 05:18:42,773 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:18:42,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609797672] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:18:42,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1325247998] [2024-11-14 05:18:42,774 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:18:42,775 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:18:42,775 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:18:42,775 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:18:42,775 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:18:43,221 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:18:45,091 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '39244#(and (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_380| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_384| Int)) (and (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_384|) (<= 1 |#StackHeapBarrier|) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_380|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_384|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_380|) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))) (= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0))' at error location [2024-11-14 05:18:45,091 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:18:45,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:18:45,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 39 [2024-11-14 05:18:45,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847628312] [2024-11-14 05:18:45,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:18:45,092 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-14 05:18:45,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:18:45,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-14 05:18:45,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2401, Unknown=1, NotChecked=0, Total=2550 [2024-11-14 05:18:45,093 INFO L87 Difference]: Start difference. First operand 1515 states and 1798 transitions. Second operand has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 39 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:18:46,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:18:46,599 INFO L93 Difference]: Finished difference Result 2170 states and 2543 transitions. [2024-11-14 05:18:46,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-14 05:18:46,600 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 39 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2024-11-14 05:18:46,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:18:46,603 INFO L225 Difference]: With dead ends: 2170 [2024-11-14 05:18:46,603 INFO L226 Difference]: Without dead ends: 1884 [2024-11-14 05:18:46,603 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=267, Invalid=4562, Unknown=1, NotChecked=0, Total=4830 [2024-11-14 05:18:46,604 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 131 mSDsluCounter, 1006 mSDsCounter, 0 mSdLazyCounter, 1478 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 1052 SdHoareTripleChecker+Invalid, 1485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 05:18:46,604 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 1052 Invalid, 1485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1478 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 05:18:46,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2024-11-14 05:18:46,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1771. [2024-11-14 05:18:46,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1771 states, 1769 states have (on average 1.1899378179762579) internal successors, (2105), 1770 states have internal predecessors, (2105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:18:46,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1771 states to 1771 states and 2105 transitions. [2024-11-14 05:18:46,626 INFO L78 Accepts]: Start accepts. Automaton has 1771 states and 2105 transitions. Word has length 55 [2024-11-14 05:18:46,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:18:46,626 INFO L471 AbstractCegarLoop]: Abstraction has 1771 states and 2105 transitions. [2024-11-14 05:18:46,626 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 39 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:18:46,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1771 states and 2105 transitions. [2024-11-14 05:18:46,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-14 05:18:46,629 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:18:46,629 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:18:46,654 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-14 05:18:46,830 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-14 05:18:46,830 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:18:46,830 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:18:46,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1911087411, now seen corresponding path program 15 times [2024-11-14 05:18:46,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:18:46,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79060343] [2024-11-14 05:18:46,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:18:46,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:18:46,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:18:47,572 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 36 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:18:47,572 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:18:47,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79060343] [2024-11-14 05:18:47,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79060343] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:18:47,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541294645] [2024-11-14 05:18:47,572 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:18:47,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:18:47,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:18:47,574 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:18:47,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-14 05:18:47,763 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:18:47,763 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:18:47,766 INFO L255 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 90 conjuncts are in the unsatisfiable core [2024-11-14 05:18:47,767 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:18:48,262 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 49 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:18:48,262 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:18:48,834 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 21 treesize of output 17 [2024-11-14 05:18:49,288 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 49 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:18:49,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541294645] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:18:49,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1307542469] [2024-11-14 05:18:49,289 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:18:49,289 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:18:49,289 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:18:49,289 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:18:49,289 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:18:49,845 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:18:51,849 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '43628#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_403| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_407| Int)) (and (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_403|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_407|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_403|) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_407|) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|)))' at error location [2024-11-14 05:18:51,849 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:18:51,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:18:51,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 55 [2024-11-14 05:18:51,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070557777] [2024-11-14 05:18:51,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:18:51,850 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-11-14 05:18:51,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:18:51,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-11-14 05:18:51,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=474, Invalid=4217, Unknown=1, NotChecked=0, Total=4692 [2024-11-14 05:18:51,851 INFO L87 Difference]: Start difference. First operand 1771 states and 2105 transitions. Second operand has 57 states, 56 states have (on average 2.482142857142857) internal successors, (139), 56 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:18:53,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:18:53,561 INFO L93 Difference]: Finished difference Result 2024 states and 2369 transitions. [2024-11-14 05:18:53,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-14 05:18:53,562 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 2.482142857142857) internal successors, (139), 56 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2024-11-14 05:18:53,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:18:53,565 INFO L225 Difference]: With dead ends: 2024 [2024-11-14 05:18:53,565 INFO L226 Difference]: Without dead ends: 2024 [2024-11-14 05:18:53,566 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2495 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=713, Invalid=6942, Unknown=1, NotChecked=0, Total=7656 [2024-11-14 05:18:53,566 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 192 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 1267 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 1267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 05:18:53,566 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 753 Invalid, 1267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1267 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 05:18:53,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2024 states. [2024-11-14 05:18:53,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2024 to 1823. [2024-11-14 05:18:53,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1823 states, 1821 states have (on average 1.1911037891268534) internal successors, (2169), 1822 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:18:53,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1823 states to 1823 states and 2169 transitions. [2024-11-14 05:18:53,590 INFO L78 Accepts]: Start accepts. Automaton has 1823 states and 2169 transitions. Word has length 57 [2024-11-14 05:18:53,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:18:53,590 INFO L471 AbstractCegarLoop]: Abstraction has 1823 states and 2169 transitions. [2024-11-14 05:18:53,590 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 2.482142857142857) internal successors, (139), 56 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:18:53,590 INFO L276 IsEmpty]: Start isEmpty. Operand 1823 states and 2169 transitions. [2024-11-14 05:18:53,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-14 05:18:53,593 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:18:53,593 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2024-11-14 05:18:53,618 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-14 05:18:53,793 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-14 05:18:53,793 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:18:53,794 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:18:53,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1604354708, now seen corresponding path program 12 times [2024-11-14 05:18:53,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:18:53,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350749272] [2024-11-14 05:18:53,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:18:53,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:18:53,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:18:55,113 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 14 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:18:55,113 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:18:55,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350749272] [2024-11-14 05:18:55,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350749272] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:18:55,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057587464] [2024-11-14 05:18:55,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:18:55,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:18:55,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:18:55,115 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:18:55,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-14 05:18:55,339 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:18:55,339 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:18:55,343 INFO L255 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 108 conjuncts are in the unsatisfiable core [2024-11-14 05:18:55,345 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:18:55,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2024-11-14 05:18:55,871 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-14 05:18:55,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-11-14 05:18:57,333 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 14 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:18:57,333 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:18:58,063 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:18:58,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 45 treesize of output 34 [2024-11-14 05:18:58,078 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:18:58,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 57 [2024-11-14 05:18:58,100 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:18:58,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 37 [2024-11-14 05:18:59,019 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 20 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:18:59,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057587464] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:18:59,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1893106456] [2024-11-14 05:18:59,021 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:18:59,021 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:18:59,021 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:18:59,021 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:18:59,021 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:19:00,049 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:19:01,782 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '47525#true' at error location [2024-11-14 05:19:01,782 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:19:01,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:19:01,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 28, 26] total 66 [2024-11-14 05:19:01,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603634779] [2024-11-14 05:19:01,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:19:01,783 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-11-14 05:19:01,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:19:01,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-11-14 05:19:01,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=5572, Unknown=31, NotChecked=0, Total=5852 [2024-11-14 05:19:01,784 INFO L87 Difference]: Start difference. First operand 1823 states and 2169 transitions. Second operand has 67 states, 67 states have (on average 2.074626865671642) internal successors, (139), 66 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:03,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:19:03,501 INFO L93 Difference]: Finished difference Result 4265 states and 5020 transitions. [2024-11-14 05:19:03,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-14 05:19:03,502 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.074626865671642) internal successors, (139), 66 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2024-11-14 05:19:03,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:19:03,506 INFO L225 Difference]: With dead ends: 4265 [2024-11-14 05:19:03,506 INFO L226 Difference]: Without dead ends: 2345 [2024-11-14 05:19:03,507 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1694 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=306, Invalid=6803, Unknown=31, NotChecked=0, Total=7140 [2024-11-14 05:19:03,507 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 65 mSDsluCounter, 1079 mSDsCounter, 0 mSdLazyCounter, 2054 mSolverCounterSat, 7 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 1112 SdHoareTripleChecker+Invalid, 2063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 2054 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:19:03,507 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 1112 Invalid, 2063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 2054 Invalid, 2 Unknown, 0 Unchecked, 1.3s Time] [2024-11-14 05:19:03,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2345 states. [2024-11-14 05:19:03,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2345 to 1884. [2024-11-14 05:19:03,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1884 states, 1882 states have (on average 1.1912858660998937) internal successors, (2242), 1883 states have internal predecessors, (2242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:03,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 2242 transitions. [2024-11-14 05:19:03,527 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 2242 transitions. Word has length 61 [2024-11-14 05:19:03,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:19:03,527 INFO L471 AbstractCegarLoop]: Abstraction has 1884 states and 2242 transitions. [2024-11-14 05:19:03,527 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.074626865671642) internal successors, (139), 66 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:03,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 2242 transitions. [2024-11-14 05:19:03,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-14 05:19:03,529 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:19:03,530 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:19:03,550 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-14 05:19:03,730 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2024-11-14 05:19:03,731 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:19:03,731 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:19:03,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1524955720, now seen corresponding path program 16 times [2024-11-14 05:19:03,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:19:03,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735593051] [2024-11-14 05:19:03,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:19:03,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:19:03,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:19:04,622 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:19:04,622 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:19:04,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735593051] [2024-11-14 05:19:04,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735593051] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:19:04,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838576320] [2024-11-14 05:19:04,622 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:19:04,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:19:04,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:19:04,624 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:19:04,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-14 05:19:04,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:19:04,777 INFO L255 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 102 conjuncts are in the unsatisfiable core [2024-11-14 05:19:04,779 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:19:05,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 9 [2024-11-14 05:19:05,179 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:19:05,180 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:19:05,243 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 15 treesize of output 13 [2024-11-14 05:19:05,245 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 16 treesize of output 12 [2024-11-14 05:19:05,339 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:19:05,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838576320] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:19:05,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1594950651] [2024-11-14 05:19:05,340 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:19:05,341 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:19:05,341 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:19:05,341 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:19:05,341 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:19:05,724 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:19:07,480 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '54529#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_453| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_449| Int)) (and (<= 1 |#StackHeapBarrier|) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_449|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_453|) (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_453|) (= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_449|) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|)))' at error location [2024-11-14 05:19:07,480 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:19:07,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:19:07,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 42 [2024-11-14 05:19:07,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529866632] [2024-11-14 05:19:07,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:19:07,481 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-14 05:19:07,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:19:07,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-14 05:19:07,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2705, Unknown=1, NotChecked=0, Total=2862 [2024-11-14 05:19:07,481 INFO L87 Difference]: Start difference. First operand 1884 states and 2242 transitions. Second operand has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:09,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:19:09,585 INFO L93 Difference]: Finished difference Result 2675 states and 3144 transitions. [2024-11-14 05:19:09,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-14 05:19:09,586 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2024-11-14 05:19:09,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:19:09,594 INFO L225 Difference]: With dead ends: 2675 [2024-11-14 05:19:09,594 INFO L226 Difference]: Without dead ends: 2299 [2024-11-14 05:19:09,594 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1300 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=287, Invalid=5262, Unknown=1, NotChecked=0, Total=5550 [2024-11-14 05:19:09,595 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 92 mSDsluCounter, 1234 mSDsCounter, 0 mSdLazyCounter, 1763 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 1285 SdHoareTripleChecker+Invalid, 1771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:19:09,595 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 1285 Invalid, 1771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1763 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-14 05:19:09,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2299 states. [2024-11-14 05:19:09,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2299 to 2170. [2024-11-14 05:19:09,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2170 states, 2168 states have (on average 1.1928044280442804) internal successors, (2586), 2169 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:09,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2170 states to 2170 states and 2586 transitions. [2024-11-14 05:19:09,631 INFO L78 Accepts]: Start accepts. Automaton has 2170 states and 2586 transitions. Word has length 61 [2024-11-14 05:19:09,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:19:09,631 INFO L471 AbstractCegarLoop]: Abstraction has 2170 states and 2586 transitions. [2024-11-14 05:19:09,631 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:09,631 INFO L276 IsEmpty]: Start isEmpty. Operand 2170 states and 2586 transitions. [2024-11-14 05:19:09,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-14 05:19:09,633 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:19:09,633 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2024-11-14 05:19:09,655 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-14 05:19:09,833 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:19:09,834 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:19:09,834 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:19:09,834 INFO L85 PathProgramCache]: Analyzing trace with hash -342435308, now seen corresponding path program 13 times [2024-11-14 05:19:09,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:19:09,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486373431] [2024-11-14 05:19:09,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:19:09,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:19:09,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:19:10,735 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 36 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:19:10,735 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:19:10,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486373431] [2024-11-14 05:19:10,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486373431] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:19:10,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534592191] [2024-11-14 05:19:10,736 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:19:10,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:19:10,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:19:10,738 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:19:10,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-14 05:19:10,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:19:10,936 INFO L255 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-11-14 05:19:10,938 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:19:11,454 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 36 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:19:11,454 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:19:12,056 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 [2024-11-14 05:19:12,251 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 36 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:19:12,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534592191] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:19:12,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [154311977] [2024-11-14 05:19:12,252 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:19:12,253 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:19:12,253 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:19:12,253 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:19:12,253 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:19:13,066 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:19:14,505 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '59428#true' at error location [2024-11-14 05:19:14,506 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:19:14,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:19:14,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 41 [2024-11-14 05:19:14,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962414118] [2024-11-14 05:19:14,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:19:14,506 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-14 05:19:14,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:19:14,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-14 05:19:14,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=2519, Unknown=0, NotChecked=0, Total=2756 [2024-11-14 05:19:14,507 INFO L87 Difference]: Start difference. First operand 2170 states and 2586 transitions. Second operand has 43 states, 42 states have (on average 3.0952380952380953) internal successors, (130), 42 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:15,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:19:15,684 INFO L93 Difference]: Finished difference Result 2415 states and 2870 transitions. [2024-11-14 05:19:15,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-14 05:19:15,685 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 3.0952380952380953) internal successors, (130), 42 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2024-11-14 05:19:15,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:19:15,691 INFO L225 Difference]: With dead ends: 2415 [2024-11-14 05:19:15,691 INFO L226 Difference]: Without dead ends: 2415 [2024-11-14 05:19:15,692 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 147 SyntacticMatches, 8 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=314, Invalid=3346, Unknown=0, NotChecked=0, Total=3660 [2024-11-14 05:19:15,692 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 39 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 05:19:15,692 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 553 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1115 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 05:19:15,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2024-11-14 05:19:15,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 2408. [2024-11-14 05:19:15,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2408 states, 2406 states have (on average 1.1928512053200333) internal successors, (2870), 2407 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:15,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2408 states to 2408 states and 2870 transitions. [2024-11-14 05:19:15,746 INFO L78 Accepts]: Start accepts. Automaton has 2408 states and 2870 transitions. Word has length 63 [2024-11-14 05:19:15,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:19:15,747 INFO L471 AbstractCegarLoop]: Abstraction has 2408 states and 2870 transitions. [2024-11-14 05:19:15,747 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 3.0952380952380953) internal successors, (130), 42 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:15,747 INFO L276 IsEmpty]: Start isEmpty. Operand 2408 states and 2870 transitions. [2024-11-14 05:19:15,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-14 05:19:15,750 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:19:15,750 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:19:15,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-14 05:19:15,951 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-11-14 05:19:15,951 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:19:15,952 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:19:15,952 INFO L85 PathProgramCache]: Analyzing trace with hash -465696802, now seen corresponding path program 17 times [2024-11-14 05:19:15,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:19:15,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742565595] [2024-11-14 05:19:15,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:19:15,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:19:15,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:19:16,904 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 49 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:19:16,905 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:19:16,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742565595] [2024-11-14 05:19:16,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742565595] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:19:16,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083140760] [2024-11-14 05:19:16,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:19:16,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:19:16,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:19:16,907 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:19:16,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-14 05:19:17,184 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-14 05:19:17,184 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:19:17,187 INFO L255 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-11-14 05:19:17,190 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:19:18,005 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 64 proven. 179 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:19:18,006 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:19:18,800 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 7 treesize of output 5 [2024-11-14 05:19:19,189 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 64 proven. 179 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:19:19,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083140760] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:19:19,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1617569553] [2024-11-14 05:19:19,191 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:19:19,191 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:19:19,191 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:19:19,191 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:19:19,191 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:19:19,831 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:19:21,922 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '65126#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_498| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_493| Int)) (and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_498|) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_493|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_498|) (= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_493|) (<= 2 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|)))' at error location [2024-11-14 05:19:21,923 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:19:21,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:19:21,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 61 [2024-11-14 05:19:21,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665816245] [2024-11-14 05:19:21,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:19:21,923 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-11-14 05:19:21,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:19:21,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-11-14 05:19:21,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=545, Invalid=4856, Unknown=1, NotChecked=0, Total=5402 [2024-11-14 05:19:21,925 INFO L87 Difference]: Start difference. First operand 2408 states and 2870 transitions. Second operand has 62 states, 61 states have (on average 2.737704918032787) internal successors, (167), 62 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:23,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:19:23,473 INFO L93 Difference]: Finished difference Result 2730 states and 3205 transitions. [2024-11-14 05:19:23,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-14 05:19:23,473 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 2.737704918032787) internal successors, (167), 62 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2024-11-14 05:19:23,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:19:23,480 INFO L225 Difference]: With dead ends: 2730 [2024-11-14 05:19:23,481 INFO L226 Difference]: Without dead ends: 2730 [2024-11-14 05:19:23,481 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 129 SyntacticMatches, 10 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3393 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=943, Invalid=7986, Unknown=1, NotChecked=0, Total=8930 [2024-11-14 05:19:23,483 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 155 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 1056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 05:19:23,484 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 659 Invalid, 1056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1056 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 05:19:23,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2730 states. [2024-11-14 05:19:23,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2730 to 2468. [2024-11-14 05:19:23,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2468 states, 2466 states have (on average 1.1938361719383617) internal successors, (2944), 2467 states have internal predecessors, (2944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:23,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2468 states to 2468 states and 2944 transitions. [2024-11-14 05:19:23,515 INFO L78 Accepts]: Start accepts. Automaton has 2468 states and 2944 transitions. Word has length 63 [2024-11-14 05:19:23,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:19:23,516 INFO L471 AbstractCegarLoop]: Abstraction has 2468 states and 2944 transitions. [2024-11-14 05:19:23,516 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 2.737704918032787) internal successors, (167), 62 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:23,516 INFO L276 IsEmpty]: Start isEmpty. Operand 2468 states and 2944 transitions. [2024-11-14 05:19:23,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-14 05:19:23,518 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:19:23,518 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:19:23,541 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-14 05:19:23,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-11-14 05:19:23,721 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:19:23,722 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:19:23,722 INFO L85 PathProgramCache]: Analyzing trace with hash 97967843, now seen corresponding path program 18 times [2024-11-14 05:19:23,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:19:23,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483458281] [2024-11-14 05:19:23,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:19:23,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:19:23,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:19:24,742 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 20 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:19:24,742 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:19:24,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483458281] [2024-11-14 05:19:24,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483458281] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:19:24,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205312770] [2024-11-14 05:19:24,742 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:19:24,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:19:24,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:19:24,744 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:19:24,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-14 05:19:24,996 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:19:24,996 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:19:25,000 INFO L255 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 110 conjuncts are in the unsatisfiable core [2024-11-14 05:19:25,002 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:19:25,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 9 [2024-11-14 05:19:25,514 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 20 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:19:25,514 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:19:25,596 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 15 treesize of output 13 [2024-11-14 05:19:25,598 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 16 treesize of output 12 [2024-11-14 05:19:25,713 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 20 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:19:25,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205312770] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:19:25,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [528772688] [2024-11-14 05:19:25,714 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:19:25,714 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:19:25,714 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:19:25,715 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:19:25,715 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:19:26,099 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:19:27,978 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '70819#(and (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_526| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_521| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_521|) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_521|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_526|) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_526|) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0))' at error location [2024-11-14 05:19:27,978 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:19:27,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:19:27,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 45 [2024-11-14 05:19:27,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715037825] [2024-11-14 05:19:27,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:19:27,978 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-14 05:19:27,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:19:27,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-14 05:19:27,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=3027, Unknown=1, NotChecked=0, Total=3192 [2024-11-14 05:19:27,979 INFO L87 Difference]: Start difference. First operand 2468 states and 2944 transitions. Second operand has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:29,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:19:29,860 INFO L93 Difference]: Finished difference Result 3402 states and 4011 transitions. [2024-11-14 05:19:29,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-14 05:19:29,860 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2024-11-14 05:19:29,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:19:29,867 INFO L225 Difference]: With dead ends: 3402 [2024-11-14 05:19:29,867 INFO L226 Difference]: Without dead ends: 2986 [2024-11-14 05:19:29,868 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1472 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=307, Invalid=6012, Unknown=1, NotChecked=0, Total=6320 [2024-11-14 05:19:29,868 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 161 mSDsluCounter, 1249 mSDsCounter, 0 mSdLazyCounter, 1901 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 1305 SdHoareTripleChecker+Invalid, 1910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:19:29,869 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 1305 Invalid, 1910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1901 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 05:19:29,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2986 states. [2024-11-14 05:19:29,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2986 to 2824. [2024-11-14 05:19:29,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2824 states, 2822 states have (on average 1.1956059532246635) internal successors, (3374), 2823 states have internal predecessors, (3374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:29,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2824 states to 2824 states and 3374 transitions. [2024-11-14 05:19:29,902 INFO L78 Accepts]: Start accepts. Automaton has 2824 states and 3374 transitions. Word has length 67 [2024-11-14 05:19:29,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:19:29,902 INFO L471 AbstractCegarLoop]: Abstraction has 2824 states and 3374 transitions. [2024-11-14 05:19:29,903 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:29,903 INFO L276 IsEmpty]: Start isEmpty. Operand 2824 states and 3374 transitions. [2024-11-14 05:19:29,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-14 05:19:29,905 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:19:29,905 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1] [2024-11-14 05:19:29,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-11-14 05:19:30,105 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-11-14 05:19:30,105 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:19:30,105 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:19:30,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1905345593, now seen corresponding path program 14 times [2024-11-14 05:19:30,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:19:30,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939036636] [2024-11-14 05:19:30,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:19:30,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:19:30,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:19:31,084 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 16 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:19:31,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:19:31,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939036636] [2024-11-14 05:19:31,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939036636] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:19:31,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122435668] [2024-11-14 05:19:31,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:19:31,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:19:31,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:19:31,086 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:19:31,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-14 05:19:31,322 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-14 05:19:31,322 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:19:31,325 INFO L255 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 99 conjuncts are in the unsatisfiable core [2024-11-14 05:19:31,328 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:19:31,333 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 10 treesize of output 8 [2024-11-14 05:19:31,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 05:19:31,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 05:19:31,889 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 16 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:19:31,889 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:19:31,988 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1228 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1228) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 7 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2024-11-14 05:19:31,996 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:19:31,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 23 treesize of output 24 [2024-11-14 05:19:32,007 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:19:32,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2024-11-14 05:19:32,189 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 16 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:19:32,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122435668] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:19:32,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1759033816] [2024-11-14 05:19:32,190 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:19:32,190 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:19:32,191 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:19:32,191 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:19:32,191 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:19:32,896 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:19:34,495 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '77551#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post2#1.base_235| Int) (|v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_239| Int)) (and (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post2#1.base_235|) |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_239|) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_239|)))' at error location [2024-11-14 05:19:34,495 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:19:34,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:19:34,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 39 [2024-11-14 05:19:34,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085153698] [2024-11-14 05:19:34,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:19:34,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-14 05:19:34,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:19:34,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-14 05:19:34,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2416, Unknown=1, NotChecked=98, Total=2652 [2024-11-14 05:19:34,497 INFO L87 Difference]: Start difference. First operand 2824 states and 3374 transitions. Second operand has 40 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:35,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:19:35,552 INFO L93 Difference]: Finished difference Result 5150 states and 6087 transitions. [2024-11-14 05:19:35,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-14 05:19:35,552 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2024-11-14 05:19:35,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:19:35,559 INFO L225 Difference]: With dead ends: 5150 [2024-11-14 05:19:35,559 INFO L226 Difference]: Without dead ends: 3210 [2024-11-14 05:19:35,559 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=181, Invalid=3244, Unknown=1, NotChecked=114, Total=3540 [2024-11-14 05:19:35,559 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 27 mSDsluCounter, 977 mSDsCounter, 0 mSdLazyCounter, 1418 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 1018 SdHoareTripleChecker+Invalid, 1525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 05:19:35,559 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 1018 Invalid, 1525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1418 Invalid, 0 Unknown, 100 Unchecked, 0.7s Time] [2024-11-14 05:19:35,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3210 states. [2024-11-14 05:19:35,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3210 to 2893. [2024-11-14 05:19:35,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2893 states, 2891 states have (on average 1.195434105845728) internal successors, (3456), 2892 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:35,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2893 states to 2893 states and 3456 transitions. [2024-11-14 05:19:35,581 INFO L78 Accepts]: Start accepts. Automaton has 2893 states and 3456 transitions. Word has length 69 [2024-11-14 05:19:35,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:19:35,581 INFO L471 AbstractCegarLoop]: Abstraction has 2893 states and 3456 transitions. [2024-11-14 05:19:35,581 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:35,581 INFO L276 IsEmpty]: Start isEmpty. Operand 2893 states and 3456 transitions. [2024-11-14 05:19:35,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-14 05:19:35,582 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:19:35,582 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:19:35,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-14 05:19:35,782 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-11-14 05:19:35,783 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:19:35,783 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:19:35,783 INFO L85 PathProgramCache]: Analyzing trace with hash -983749495, now seen corresponding path program 19 times [2024-11-14 05:19:35,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:19:35,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249730847] [2024-11-14 05:19:35,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:19:35,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:19:35,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:19:36,657 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 64 proven. 236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:19:36,657 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:19:36,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249730847] [2024-11-14 05:19:36,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249730847] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:19:36,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497477298] [2024-11-14 05:19:36,657 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:19:36,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:19:36,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:19:36,659 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:19:36,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-14 05:19:36,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:19:36,825 INFO L255 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 105 conjuncts are in the unsatisfiable core [2024-11-14 05:19:36,826 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:19:37,338 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 81 proven. 219 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:19:37,339 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:19:38,014 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 [2024-11-14 05:19:38,290 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 81 proven. 219 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:19:38,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497477298] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:19:38,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [407123542] [2024-11-14 05:19:38,291 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:19:38,291 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:19:38,291 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:19:38,291 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:19:38,291 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:19:38,730 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:19:40,797 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '86087#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_575| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_569| Int)) (and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_569|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_575|) (= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_569|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_575|) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|)))' at error location [2024-11-14 05:19:40,797 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:19:40,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:19:40,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 55 [2024-11-14 05:19:40,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059408342] [2024-11-14 05:19:40,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:19:40,798 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-11-14 05:19:40,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:19:40,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-11-14 05:19:40,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=4172, Unknown=1, NotChecked=0, Total=4556 [2024-11-14 05:19:40,799 INFO L87 Difference]: Start difference. First operand 2893 states and 3456 transitions. Second operand has 56 states, 55 states have (on average 2.6) internal successors, (143), 56 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:42,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:19:42,790 INFO L93 Difference]: Finished difference Result 3268 states and 3845 transitions. [2024-11-14 05:19:42,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-14 05:19:42,790 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 2.6) internal successors, (143), 56 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2024-11-14 05:19:42,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:19:42,796 INFO L225 Difference]: With dead ends: 3268 [2024-11-14 05:19:42,796 INFO L226 Difference]: Without dead ends: 3268 [2024-11-14 05:19:42,796 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 154 SyntacticMatches, 11 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2998 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=687, Invalid=7502, Unknown=1, NotChecked=0, Total=8190 [2024-11-14 05:19:42,796 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 309 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 1721 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 901 SdHoareTripleChecker+Invalid, 1721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:19:42,797 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 901 Invalid, 1721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1721 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 05:19:42,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3268 states. [2024-11-14 05:19:42,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3268 to 2957. [2024-11-14 05:19:42,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2957 states, 2955 states have (on average 1.1962774957698816) internal successors, (3535), 2956 states have internal predecessors, (3535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:42,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2957 states to 2957 states and 3535 transitions. [2024-11-14 05:19:42,826 INFO L78 Accepts]: Start accepts. Automaton has 2957 states and 3535 transitions. Word has length 69 [2024-11-14 05:19:42,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:19:42,826 INFO L471 AbstractCegarLoop]: Abstraction has 2957 states and 3535 transitions. [2024-11-14 05:19:42,826 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 2.6) internal successors, (143), 56 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:42,826 INFO L276 IsEmpty]: Start isEmpty. Operand 2957 states and 3535 transitions. [2024-11-14 05:19:42,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-14 05:19:42,827 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:19:42,827 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2024-11-14 05:19:42,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-11-14 05:19:43,028 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-11-14 05:19:43,028 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:19:43,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:19:43,028 INFO L85 PathProgramCache]: Analyzing trace with hash 2056616161, now seen corresponding path program 15 times [2024-11-14 05:19:43,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:19:43,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516326877] [2024-11-14 05:19:43,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:19:43,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:19:43,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:19:43,830 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 49 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:19:43,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:19:43,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516326877] [2024-11-14 05:19:43,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516326877] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:19:43,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032526422] [2024-11-14 05:19:43,831 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:19:43,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:19:43,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:19:43,832 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:19:43,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-14 05:19:44,057 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:19:44,057 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:19:44,060 INFO L255 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 88 conjuncts are in the unsatisfiable core [2024-11-14 05:19:44,061 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:19:44,651 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 49 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:19:44,651 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:19:45,222 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 21 treesize of output 17 [2024-11-14 05:19:45,599 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 49 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:19:45,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032526422] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:19:45,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [173355904] [2024-11-14 05:19:45,600 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:19:45,600 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:19:45,600 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:19:45,600 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:19:45,600 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:19:46,440 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:19:47,876 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '92370#true' at error location [2024-11-14 05:19:47,876 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:19:47,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:19:47,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 52 [2024-11-14 05:19:47,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239581398] [2024-11-14 05:19:47,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:19:47,877 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-11-14 05:19:47,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:19:47,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-11-14 05:19:47,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=3634, Unknown=0, NotChecked=0, Total=4032 [2024-11-14 05:19:47,878 INFO L87 Difference]: Start difference. First operand 2957 states and 3535 transitions. Second operand has 54 states, 53 states have (on average 3.1132075471698113) internal successors, (165), 53 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:49,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:19:49,366 INFO L93 Difference]: Finished difference Result 3253 states and 3880 transitions. [2024-11-14 05:19:49,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-14 05:19:49,366 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 3.1132075471698113) internal successors, (165), 53 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2024-11-14 05:19:49,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:19:49,371 INFO L225 Difference]: With dead ends: 3253 [2024-11-14 05:19:49,371 INFO L226 Difference]: Without dead ends: 3253 [2024-11-14 05:19:49,371 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1611 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=483, Invalid=4629, Unknown=0, NotChecked=0, Total=5112 [2024-11-14 05:19:49,372 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 33 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 1530 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 1530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:19:49,372 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 792 Invalid, 1530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1530 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-14 05:19:49,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3253 states. [2024-11-14 05:19:49,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3253 to 3245. [2024-11-14 05:19:49,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3245 states, 3243 states have (on average 1.196423065063213) internal successors, (3880), 3244 states have internal predecessors, (3880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:49,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3245 states to 3245 states and 3880 transitions. [2024-11-14 05:19:49,399 INFO L78 Accepts]: Start accepts. Automaton has 3245 states and 3880 transitions. Word has length 71 [2024-11-14 05:19:49,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:19:49,399 INFO L471 AbstractCegarLoop]: Abstraction has 3245 states and 3880 transitions. [2024-11-14 05:19:49,400 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 3.1132075471698113) internal successors, (165), 53 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:49,400 INFO L276 IsEmpty]: Start isEmpty. Operand 3245 states and 3880 transitions. [2024-11-14 05:19:49,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-14 05:19:49,401 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:19:49,401 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:19:49,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-11-14 05:19:49,601 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:19:49,602 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:19:49,602 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:19:49,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1143846414, now seen corresponding path program 20 times [2024-11-14 05:19:49,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:19:49,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501201435] [2024-11-14 05:19:49,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:19:49,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:19:49,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:19:50,523 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 22 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:19:50,524 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:19:50,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501201435] [2024-11-14 05:19:50,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501201435] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:19:50,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725326099] [2024-11-14 05:19:50,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:19:50,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:19:50,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:19:50,525 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:19:50,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-14 05:19:50,844 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-11-14 05:19:50,844 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:19:50,848 INFO L255 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 122 conjuncts are in the unsatisfiable core [2024-11-14 05:19:50,850 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:19:51,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 9 [2024-11-14 05:19:51,437 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 22 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:19:51,437 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:19:51,526 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 15 treesize of output 13 [2024-11-14 05:19:51,528 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 16 treesize of output 12 [2024-11-14 05:19:51,658 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 22 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:19:51,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725326099] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:19:51,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [147618909] [2024-11-14 05:19:51,659 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:19:51,659 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:19:51,659 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:19:51,660 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:19:51,660 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:19:52,046 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:19:53,939 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '99848#(and (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_620| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_626| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_626|) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_620|) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_620|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_626|) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0))' at error location [2024-11-14 05:19:53,939 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:19:53,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:19:53,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 48 [2024-11-14 05:19:53,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477736504] [2024-11-14 05:19:53,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:19:53,940 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-14 05:19:53,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:19:53,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-14 05:19:53,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=3367, Unknown=1, NotChecked=0, Total=3540 [2024-11-14 05:19:53,940 INFO L87 Difference]: Start difference. First operand 3245 states and 3880 transitions. Second operand has 48 states, 48 states have (on average 2.1875) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:56,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:19:56,229 INFO L93 Difference]: Finished difference Result 4405 states and 5208 transitions. [2024-11-14 05:19:56,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-14 05:19:56,229 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1875) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2024-11-14 05:19:56,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:19:56,234 INFO L225 Difference]: With dead ends: 4405 [2024-11-14 05:19:56,234 INFO L226 Difference]: Without dead ends: 3881 [2024-11-14 05:19:56,235 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1655 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=327, Invalid=6812, Unknown=1, NotChecked=0, Total=7140 [2024-11-14 05:19:56,236 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 110 mSDsluCounter, 1757 mSDsCounter, 0 mSdLazyCounter, 2493 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1818 SdHoareTripleChecker+Invalid, 2503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:19:56,236 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 1818 Invalid, 2503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2493 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-14 05:19:56,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3881 states. [2024-11-14 05:19:56,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3881 to 3681. [2024-11-14 05:19:56,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3681 states, 3679 states have (on average 1.1981516716499048) internal successors, (4408), 3680 states have internal predecessors, (4408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:56,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3681 states to 3681 states and 4408 transitions. [2024-11-14 05:19:56,279 INFO L78 Accepts]: Start accepts. Automaton has 3681 states and 4408 transitions. Word has length 73 [2024-11-14 05:19:56,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:19:56,280 INFO L471 AbstractCegarLoop]: Abstraction has 3681 states and 4408 transitions. [2024-11-14 05:19:56,280 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1875) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:19:56,280 INFO L276 IsEmpty]: Start isEmpty. Operand 3681 states and 4408 transitions. [2024-11-14 05:19:56,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-14 05:19:56,283 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:19:56,283 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:19:56,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-11-14 05:19:56,483 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-11-14 05:19:56,483 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:19:56,483 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:19:56,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1414573876, now seen corresponding path program 21 times [2024-11-14 05:19:56,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:19:56,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757708190] [2024-11-14 05:19:56,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:19:56,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:19:56,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:19:57,466 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 81 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:19:57,466 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:19:57,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757708190] [2024-11-14 05:19:57,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757708190] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:19:57,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785079563] [2024-11-14 05:19:57,466 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:19:57,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:19:57,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:19:57,468 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:19:57,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-14 05:19:57,698 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:19:57,698 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:19:57,702 INFO L255 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 117 conjuncts are in the unsatisfiable core [2024-11-14 05:19:57,703 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:19:58,408 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 100 proven. 263 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:19:58,409 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:19:59,116 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 21 treesize of output 17 [2024-11-14 05:19:59,802 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 100 proven. 263 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:19:59,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785079563] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:19:59,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [695066286] [2024-11-14 05:19:59,803 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:19:59,803 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:19:59,803 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:19:59,803 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:19:59,803 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:20:00,313 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:20:02,722 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '108512#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_649| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_655| Int)) (and (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_649|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_649|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_655|) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_655|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|)))' at error location [2024-11-14 05:20:02,722 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:20:02,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:20:02,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 70 [2024-11-14 05:20:02,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374683053] [2024-11-14 05:20:02,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:20:02,723 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2024-11-14 05:20:02,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:20:02,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2024-11-14 05:20:02,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=729, Invalid=6242, Unknown=1, NotChecked=0, Total=6972 [2024-11-14 05:20:02,724 INFO L87 Difference]: Start difference. First operand 3681 states and 4408 transitions. Second operand has 72 states, 71 states have (on average 2.5492957746478875) internal successors, (181), 71 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:20:05,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:20:05,306 INFO L93 Difference]: Finished difference Result 4113 states and 4855 transitions. [2024-11-14 05:20:05,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-14 05:20:05,306 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 2.5492957746478875) internal successors, (181), 71 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2024-11-14 05:20:05,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:20:05,314 INFO L225 Difference]: With dead ends: 4113 [2024-11-14 05:20:05,314 INFO L226 Difference]: Without dead ends: 4113 [2024-11-14 05:20:05,315 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3896 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1082, Invalid=10689, Unknown=1, NotChecked=0, Total=11772 [2024-11-14 05:20:05,315 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 289 mSDsluCounter, 1159 mSDsCounter, 0 mSdLazyCounter, 2151 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 1213 SdHoareTripleChecker+Invalid, 2151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:20:05,315 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 1213 Invalid, 2151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2151 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-14 05:20:05,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4113 states. [2024-11-14 05:20:05,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4113 to 3749. [2024-11-14 05:20:05,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3749 states, 3747 states have (on average 1.1988257272484655) internal successors, (4492), 3748 states have internal predecessors, (4492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:20:05,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3749 states to 3749 states and 4492 transitions. [2024-11-14 05:20:05,367 INFO L78 Accepts]: Start accepts. Automaton has 3749 states and 4492 transitions. Word has length 75 [2024-11-14 05:20:05,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:20:05,367 INFO L471 AbstractCegarLoop]: Abstraction has 3749 states and 4492 transitions. [2024-11-14 05:20:05,367 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 2.5492957746478875) internal successors, (181), 71 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:20:05,367 INFO L276 IsEmpty]: Start isEmpty. Operand 3749 states and 4492 transitions. [2024-11-14 05:20:05,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-14 05:20:05,370 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:20:05,370 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1] [2024-11-14 05:20:05,393 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-11-14 05:20:05,570 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-11-14 05:20:05,572 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:20:05,573 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:20:05,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1090595514, now seen corresponding path program 16 times [2024-11-14 05:20:05,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:20:05,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980626268] [2024-11-14 05:20:05,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:20:05,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:20:05,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:20:06,908 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 18 proven. 280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:20:06,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:20:06,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980626268] [2024-11-14 05:20:06,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980626268] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:20:06,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868994334] [2024-11-14 05:20:06,908 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:20:06,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:20:06,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:20:06,910 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:20:06,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-14 05:20:07,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:20:07,136 INFO L255 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 107 conjuncts are in the unsatisfiable core [2024-11-14 05:20:07,138 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:20:07,143 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 18 treesize of output 16 [2024-11-14 05:20:07,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 05:20:07,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 05:20:07,940 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 18 proven. 280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:20:07,940 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:20:08,156 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:20:08,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 23 treesize of output 24 [2024-11-14 05:20:08,164 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:20:08,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2024-11-14 05:20:08,381 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 18 proven. 280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:20:08,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868994334] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:20:08,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1888917165] [2024-11-14 05:20:08,382 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:20:08,382 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:20:08,382 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:20:08,382 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:20:08,382 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:20:09,149 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:20:10,959 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '116436#true' at error location [2024-11-14 05:20:10,959 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:20:10,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:20:10,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 25, 25] total 45 [2024-11-14 05:20:10,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072478213] [2024-11-14 05:20:10,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:20:10,960 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-14 05:20:10,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:20:10,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-14 05:20:10,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=2939, Unknown=15, NotChecked=0, Total=3080 [2024-11-14 05:20:10,961 INFO L87 Difference]: Start difference. First operand 3749 states and 4492 transitions. Second operand has 46 states, 46 states have (on average 2.347826086956522) internal successors, (108), 45 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:20:13,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:20:13,903 INFO L93 Difference]: Finished difference Result 6850 states and 8131 transitions. [2024-11-14 05:20:13,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-14 05:20:13,904 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.347826086956522) internal successors, (108), 45 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2024-11-14 05:20:13,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:20:13,912 INFO L225 Difference]: With dead ends: 6850 [2024-11-14 05:20:13,912 INFO L226 Difference]: Without dead ends: 4254 [2024-11-14 05:20:13,912 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=243, Invalid=5747, Unknown=16, NotChecked=0, Total=6006 [2024-11-14 05:20:13,913 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 35 mSDsluCounter, 1651 mSDsCounter, 0 mSdLazyCounter, 2474 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 1697 SdHoareTripleChecker+Invalid, 2482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 2474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-14 05:20:13,913 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 1697 Invalid, 2482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 2474 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-14 05:20:13,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4254 states. [2024-11-14 05:20:13,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4254 to 3828. [2024-11-14 05:20:13,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3828 states, 3826 states have (on average 1.1986408782017772) internal successors, (4586), 3827 states have internal predecessors, (4586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:20:13,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3828 states to 3828 states and 4586 transitions. [2024-11-14 05:20:13,961 INFO L78 Accepts]: Start accepts. Automaton has 3828 states and 4586 transitions. Word has length 77 [2024-11-14 05:20:13,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:20:13,961 INFO L471 AbstractCegarLoop]: Abstraction has 3828 states and 4586 transitions. [2024-11-14 05:20:13,961 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.347826086956522) internal successors, (108), 45 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:20:13,961 INFO L276 IsEmpty]: Start isEmpty. Operand 3828 states and 4586 transitions. [2024-11-14 05:20:13,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-14 05:20:13,964 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:20:13,964 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2024-11-14 05:20:13,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-14 05:20:14,164 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:20:14,165 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:20:14,165 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:20:14,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1216880146, now seen corresponding path program 17 times [2024-11-14 05:20:14,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:20:14,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670299108] [2024-11-14 05:20:14,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:20:14,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:20:14,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:20:14,970 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 64 proven. 251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:20:14,970 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:20:14,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670299108] [2024-11-14 05:20:14,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670299108] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:20:14,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319187494] [2024-11-14 05:20:14,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:20:14,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:20:14,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:20:14,972 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:20:14,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-14 05:20:15,323 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-14 05:20:15,323 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:20:15,326 INFO L255 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-11-14 05:20:15,329 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:20:16,192 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 64 proven. 251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:20:16,192 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:20:17,076 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 7 treesize of output 5 [2024-11-14 05:20:17,350 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 64 proven. 251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:20:17,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319187494] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:20:17,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [626197699] [2024-11-14 05:20:17,352 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:20:17,352 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:20:17,352 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:20:17,352 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:20:17,352 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:20:18,130 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:20:19,423 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '127670#true' at error location [2024-11-14 05:20:19,423 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:20:19,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:20:19,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 59 [2024-11-14 05:20:19,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260800895] [2024-11-14 05:20:19,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:20:19,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-11-14 05:20:19,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:20:19,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-11-14 05:20:19,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=531, Invalid=4439, Unknown=0, NotChecked=0, Total=4970 [2024-11-14 05:20:19,429 INFO L87 Difference]: Start difference. First operand 3828 states and 4586 transitions. Second operand has 61 states, 60 states have (on average 3.6) internal successors, (216), 60 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:20:20,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:20:20,956 INFO L93 Difference]: Finished difference Result 4175 states and 4992 transitions. [2024-11-14 05:20:20,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-14 05:20:20,957 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 3.6) internal successors, (216), 60 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2024-11-14 05:20:20,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:20:20,960 INFO L225 Difference]: With dead ends: 4175 [2024-11-14 05:20:20,960 INFO L226 Difference]: Without dead ends: 4175 [2024-11-14 05:20:20,960 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 179 SyntacticMatches, 10 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2577 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=706, Invalid=5774, Unknown=0, NotChecked=0, Total=6480 [2024-11-14 05:20:20,961 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 71 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 1370 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 1370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:20:20,961 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 742 Invalid, 1370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1370 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 05:20:20,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4175 states. [2024-11-14 05:20:20,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4175 to 4166. [2024-11-14 05:20:20,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4166 states, 4164 states have (on average 1.1988472622478386) internal successors, (4992), 4165 states have internal predecessors, (4992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:20:20,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4166 states to 4166 states and 4992 transitions. [2024-11-14 05:20:20,992 INFO L78 Accepts]: Start accepts. Automaton has 4166 states and 4992 transitions. Word has length 79 [2024-11-14 05:20:20,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:20:20,993 INFO L471 AbstractCegarLoop]: Abstraction has 4166 states and 4992 transitions. [2024-11-14 05:20:20,993 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 3.6) internal successors, (216), 60 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:20:20,993 INFO L276 IsEmpty]: Start isEmpty. Operand 4166 states and 4992 transitions. [2024-11-14 05:20:20,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-14 05:20:20,994 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:20:20,995 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:20:21,014 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-11-14 05:20:21,195 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:20:21,195 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:20:21,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:20:21,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1392110393, now seen corresponding path program 22 times [2024-11-14 05:20:21,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:20:21,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039263516] [2024-11-14 05:20:21,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:20:21,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:20:21,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:20:22,226 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 24 proven. 385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:20:22,226 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:20:22,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039263516] [2024-11-14 05:20:22,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039263516] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:20:22,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352397241] [2024-11-14 05:20:22,226 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:20:22,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:20:22,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:20:22,228 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:20:22,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-14 05:20:22,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:20:22,432 INFO L255 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 132 conjuncts are in the unsatisfiable core [2024-11-14 05:20:22,434 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:20:22,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 9 [2024-11-14 05:20:23,048 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 24 proven. 385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:20:23,048 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:20:23,144 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 15 treesize of output 13 [2024-11-14 05:20:23,146 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 16 treesize of output 12 [2024-11-14 05:20:23,277 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 24 proven. 385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:20:23,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352397241] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:20:23,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2029362693] [2024-11-14 05:20:23,278 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:20:23,278 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:20:23,278 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:20:23,279 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:20:23,279 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:20:23,697 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:20:25,876 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '137089#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_726| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_732| Int)) (and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_732|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_726|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_732|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_726|) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|)))' at error location [2024-11-14 05:20:25,876 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:20:25,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:20:25,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 51 [2024-11-14 05:20:25,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987557729] [2024-11-14 05:20:25,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:20:25,876 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-14 05:20:25,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:20:25,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-14 05:20:25,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=3725, Unknown=1, NotChecked=0, Total=3906 [2024-11-14 05:20:25,877 INFO L87 Difference]: Start difference. First operand 4166 states and 4992 transitions. Second operand has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 51 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:20:28,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:20:28,536 INFO L93 Difference]: Finished difference Result 5576 states and 6609 transitions. [2024-11-14 05:20:28,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-14 05:20:28,537 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 51 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2024-11-14 05:20:28,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:20:28,542 INFO L225 Difference]: With dead ends: 5576 [2024-11-14 05:20:28,542 INFO L226 Difference]: Without dead ends: 4932 [2024-11-14 05:20:28,542 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1849 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=347, Invalid=7662, Unknown=1, NotChecked=0, Total=8010 [2024-11-14 05:20:28,543 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 120 mSDsluCounter, 2250 mSDsCounter, 0 mSdLazyCounter, 3074 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 2316 SdHoareTripleChecker+Invalid, 3085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 3074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-14 05:20:28,543 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 2316 Invalid, 3085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 3074 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-14 05:20:28,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4932 states. [2024-11-14 05:20:28,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4932 to 4690. [2024-11-14 05:20:28,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4690 states, 4688 states have (on average 1.2005119453924915) internal successors, (5628), 4689 states have internal predecessors, (5628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:20:28,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4690 states to 4690 states and 5628 transitions. [2024-11-14 05:20:28,584 INFO L78 Accepts]: Start accepts. Automaton has 4690 states and 5628 transitions. Word has length 79 [2024-11-14 05:20:28,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:20:28,584 INFO L471 AbstractCegarLoop]: Abstraction has 4690 states and 5628 transitions. [2024-11-14 05:20:28,585 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 51 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:20:28,585 INFO L276 IsEmpty]: Start isEmpty. Operand 4690 states and 5628 transitions. [2024-11-14 05:20:28,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-14 05:20:28,588 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:20:28,588 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:20:28,603 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-11-14 05:20:28,788 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:20:28,788 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:20:28,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:20:28,789 INFO L85 PathProgramCache]: Analyzing trace with hash 191557599, now seen corresponding path program 23 times [2024-11-14 05:20:28,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:20:28,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649118428] [2024-11-14 05:20:28,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:20:28,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:20:28,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:20:30,359 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 100 proven. 332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:20:30,359 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:20:30,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649118428] [2024-11-14 05:20:30,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649118428] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:20:30,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063857512] [2024-11-14 05:20:30,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:20:30,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:20:30,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:20:30,362 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:20:30,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-14 05:20:30,821 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-11-14 05:20:30,821 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:20:30,825 INFO L255 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 101 conjuncts are in the unsatisfiable core [2024-11-14 05:20:30,827 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:20:32,427 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 121 proven. 311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:20:32,427 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:20:33,688 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 7 treesize of output 5 [2024-11-14 05:20:34,193 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 121 proven. 311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:20:34,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063857512] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:20:34,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1547751679] [2024-11-14 05:20:34,195 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:20:34,195 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:20:34,195 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:20:34,195 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:20:34,195 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:20:34,660 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:20:36,801 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '147978#(and (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_757| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_764| Int)) (and (<= 1 |#StackHeapBarrier|) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_757|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_764|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_757|) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_764|) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))))' at error location [2024-11-14 05:20:36,801 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:20:36,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:20:36,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 76 [2024-11-14 05:20:36,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072349569] [2024-11-14 05:20:36,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:20:36,801 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2024-11-14 05:20:36,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:20:36,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2024-11-14 05:20:36,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=838, Invalid=6993, Unknown=1, NotChecked=0, Total=7832 [2024-11-14 05:20:36,802 INFO L87 Difference]: Start difference. First operand 4690 states and 5628 transitions. Second operand has 77 states, 76 states have (on average 2.8289473684210527) internal successors, (215), 77 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:20:39,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:20:39,708 INFO L93 Difference]: Finished difference Result 5211 states and 6166 transitions. [2024-11-14 05:20:39,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-14 05:20:39,709 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 2.8289473684210527) internal successors, (215), 77 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2024-11-14 05:20:39,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:20:39,713 INFO L225 Difference]: With dead ends: 5211 [2024-11-14 05:20:39,713 INFO L226 Difference]: Without dead ends: 5211 [2024-11-14 05:20:39,713 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 171 SyntacticMatches, 13 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5190 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=1434, Invalid=11905, Unknown=1, NotChecked=0, Total=13340 [2024-11-14 05:20:39,714 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 323 mSDsluCounter, 1238 mSDsCounter, 0 mSdLazyCounter, 2075 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 1294 SdHoareTripleChecker+Invalid, 2075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:20:39,714 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 1294 Invalid, 2075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2075 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-14 05:20:39,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5211 states. [2024-11-14 05:20:39,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5211 to 4766. [2024-11-14 05:20:39,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4766 states, 4764 states have (on average 1.2010915197313181) internal successors, (5722), 4765 states have internal predecessors, (5722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:20:39,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4766 states to 4766 states and 5722 transitions. [2024-11-14 05:20:39,764 INFO L78 Accepts]: Start accepts. Automaton has 4766 states and 5722 transitions. Word has length 81 [2024-11-14 05:20:39,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:20:39,764 INFO L471 AbstractCegarLoop]: Abstraction has 4766 states and 5722 transitions. [2024-11-14 05:20:39,764 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 2.8289473684210527) internal successors, (215), 77 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:20:39,765 INFO L276 IsEmpty]: Start isEmpty. Operand 4766 states and 5722 transitions. [2024-11-14 05:20:39,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-11-14 05:20:39,767 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:20:39,767 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1] [2024-11-14 05:20:39,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-11-14 05:20:39,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:20:39,968 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:20:39,968 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:20:39,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1751089299, now seen corresponding path program 18 times [2024-11-14 05:20:39,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:20:39,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947675463] [2024-11-14 05:20:39,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:20:39,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:20:39,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:20:41,391 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 20 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:20:41,391 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:20:41,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947675463] [2024-11-14 05:20:41,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947675463] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:20:41,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010380436] [2024-11-14 05:20:41,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:20:41,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:20:41,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:20:41,393 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:20:41,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-14 05:20:41,861 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:20:41,861 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:20:41,865 INFO L255 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 134 conjuncts are in the unsatisfiable core [2024-11-14 05:20:41,868 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:20:42,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2024-11-14 05:20:42,669 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-14 05:20:42,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-11-14 05:20:44,766 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 20 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:20:44,766 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:20:45,616 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:20:45,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 45 treesize of output 34 [2024-11-14 05:20:45,629 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:20:45,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 57 [2024-11-14 05:20:45,647 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:20:45,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 37 [2024-11-14 05:20:47,152 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 26 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:20:47,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010380436] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:20:47,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2036429306] [2024-11-14 05:20:47,153 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:20:47,153 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:20:47,154 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:20:47,154 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:20:47,154 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:20:48,048 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:20:50,920 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '158021#true' at error location [2024-11-14 05:20:50,920 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:20:50,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:20:50,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 32, 32] total 76 [2024-11-14 05:20:50,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740941693] [2024-11-14 05:20:50,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:20:50,921 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2024-11-14 05:20:50,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:20:50,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2024-11-14 05:20:50,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=7192, Unknown=43, NotChecked=0, Total=7482 [2024-11-14 05:20:50,922 INFO L87 Difference]: Start difference. First operand 4766 states and 5722 transitions. Second operand has 77 states, 77 states have (on average 2.5064935064935066) internal successors, (193), 76 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:20:56,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:20:56,075 INFO L93 Difference]: Finished difference Result 11876 states and 14177 transitions. [2024-11-14 05:20:56,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-11-14 05:20:56,075 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.5064935064935066) internal successors, (193), 76 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2024-11-14 05:20:56,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:20:56,078 INFO L225 Difference]: With dead ends: 11876 [2024-11-14 05:20:56,078 INFO L226 Difference]: Without dead ends: 5830 [2024-11-14 05:20:56,079 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1750 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=433, Invalid=12402, Unknown=47, NotChecked=0, Total=12882 [2024-11-14 05:20:56,079 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 59 mSDsluCounter, 2405 mSDsCounter, 0 mSdLazyCounter, 4018 mSolverCounterSat, 9 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 2452 SdHoareTripleChecker+Invalid, 4029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 4018 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:20:56,080 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 2452 Invalid, 4029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 4018 Invalid, 2 Unknown, 0 Unchecked, 3.0s Time] [2024-11-14 05:20:56,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5830 states. [2024-11-14 05:20:56,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5830 to 4851. [2024-11-14 05:20:56,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4851 states, 4849 states have (on average 1.2008661579707156) internal successors, (5823), 4850 states have internal predecessors, (5823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:20:56,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4851 states to 4851 states and 5823 transitions. [2024-11-14 05:20:56,121 INFO L78 Accepts]: Start accepts. Automaton has 4851 states and 5823 transitions. Word has length 85 [2024-11-14 05:20:56,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:20:56,121 INFO L471 AbstractCegarLoop]: Abstraction has 4851 states and 5823 transitions. [2024-11-14 05:20:56,121 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.5064935064935066) internal successors, (193), 76 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:20:56,121 INFO L276 IsEmpty]: Start isEmpty. Operand 4851 states and 5823 transitions. [2024-11-14 05:20:56,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-11-14 05:20:56,125 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:20:56,125 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:20:56,140 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-11-14 05:20:56,325 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:20:56,325 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:20:56,326 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:20:56,326 INFO L85 PathProgramCache]: Analyzing trace with hash 2086526564, now seen corresponding path program 24 times [2024-11-14 05:20:56,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:20:56,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944731664] [2024-11-14 05:20:56,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:20:56,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:20:56,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:20:57,555 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 26 proven. 456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:20:57,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:20:57,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944731664] [2024-11-14 05:20:57,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944731664] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:20:57,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124569756] [2024-11-14 05:20:57,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:20:57,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:20:57,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:20:57,558 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:20:57,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-14 05:20:57,990 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:20:57,991 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:20:57,995 INFO L255 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 142 conjuncts are in the unsatisfiable core [2024-11-14 05:20:57,998 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:20:58,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 9 [2024-11-14 05:20:58,887 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 26 proven. 456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:20:58,887 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:20:59,027 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 15 treesize of output 13 [2024-11-14 05:20:59,030 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 16 treesize of output 12 [2024-11-14 05:20:59,210 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 26 proven. 456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:20:59,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124569756] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:20:59,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1324217831] [2024-11-14 05:20:59,211 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:20:59,211 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:20:59,212 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:20:59,212 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:20:59,212 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:20:59,686 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:21:02,388 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '175951#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_817| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_824| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_817|) (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_824|) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_817|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_824|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|)))' at error location [2024-11-14 05:21:02,388 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:21:02,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:21:02,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 54 [2024-11-14 05:21:02,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448097147] [2024-11-14 05:21:02,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:21:02,389 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-11-14 05:21:02,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:21:02,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-11-14 05:21:02,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=4101, Unknown=1, NotChecked=0, Total=4290 [2024-11-14 05:21:02,390 INFO L87 Difference]: Start difference. First operand 4851 states and 5823 transitions. Second operand has 54 states, 54 states have (on average 2.240740740740741) internal successors, (121), 54 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:21:05,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:21:05,805 INFO L93 Difference]: Finished difference Result 6457 states and 7667 transitions. [2024-11-14 05:21:05,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-14 05:21:05,806 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.240740740740741) internal successors, (121), 54 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2024-11-14 05:21:05,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:21:05,809 INFO L225 Difference]: With dead ends: 6457 [2024-11-14 05:21:05,809 INFO L226 Difference]: Without dead ends: 5681 [2024-11-14 05:21:05,810 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2054 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=367, Invalid=8562, Unknown=1, NotChecked=0, Total=8930 [2024-11-14 05:21:05,810 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 206 mSDsluCounter, 2338 mSDsCounter, 0 mSdLazyCounter, 3152 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 2409 SdHoareTripleChecker+Invalid, 3164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 3152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-14 05:21:05,810 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 2409 Invalid, 3164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 3152 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-14 05:21:05,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5681 states. [2024-11-14 05:21:05,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5681 to 5417. [2024-11-14 05:21:05,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5417 states, 5415 states have (on average 1.2024007386888274) internal successors, (6511), 5416 states have internal predecessors, (6511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:21:05,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5417 states to 5417 states and 6511 transitions. [2024-11-14 05:21:05,846 INFO L78 Accepts]: Start accepts. Automaton has 5417 states and 6511 transitions. Word has length 85 [2024-11-14 05:21:05,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:21:05,846 INFO L471 AbstractCegarLoop]: Abstraction has 5417 states and 6511 transitions. [2024-11-14 05:21:05,846 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.240740740740741) internal successors, (121), 54 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:21:05,846 INFO L276 IsEmpty]: Start isEmpty. Operand 5417 states and 6511 transitions. [2024-11-14 05:21:05,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-14 05:21:05,849 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:21:05,850 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2024-11-14 05:21:05,872 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-11-14 05:21:06,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2024-11-14 05:21:06,050 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:21:06,050 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:21:06,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1509254459, now seen corresponding path program 19 times [2024-11-14 05:21:06,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:21:06,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492014921] [2024-11-14 05:21:06,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:21:06,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:21:06,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:21:07,121 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 81 proven. 309 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:21:07,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:21:07,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492014921] [2024-11-14 05:21:07,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492014921] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:21:07,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875322351] [2024-11-14 05:21:07,122 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:21:07,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:21:07,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:21:07,124 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:21:07,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-14 05:21:07,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:21:07,423 INFO L255 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 103 conjuncts are in the unsatisfiable core [2024-11-14 05:21:07,427 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:21:08,184 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 81 proven. 309 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:21:08,184 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:21:08,968 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 [2024-11-14 05:21:09,317 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 81 proven. 309 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:21:09,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875322351] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:21:09,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1210031507] [2024-11-14 05:21:09,318 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:21:09,318 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:21:09,318 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:21:09,318 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:21:09,318 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:21:10,047 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:21:11,567 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '187895#true' at error location [2024-11-14 05:21:11,567 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:21:11,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:21:11,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 53 [2024-11-14 05:21:11,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900972305] [2024-11-14 05:21:11,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:21:11,568 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-11-14 05:21:11,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:21:11,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-11-14 05:21:11,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=3791, Unknown=0, NotChecked=0, Total=4160 [2024-11-14 05:21:11,569 INFO L87 Difference]: Start difference. First operand 5417 states and 6511 transitions. Second operand has 55 states, 54 states have (on average 3.2962962962962963) internal successors, (178), 54 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:21:13,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:21:13,339 INFO L93 Difference]: Finished difference Result 5873 states and 7049 transitions. [2024-11-14 05:21:13,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-14 05:21:13,340 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 3.2962962962962963) internal successors, (178), 54 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2024-11-14 05:21:13,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:21:13,344 INFO L225 Difference]: With dead ends: 5873 [2024-11-14 05:21:13,344 INFO L226 Difference]: Without dead ends: 5873 [2024-11-14 05:21:13,344 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 210 SyntacticMatches, 11 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2177 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=491, Invalid=5209, Unknown=0, NotChecked=0, Total=5700 [2024-11-14 05:21:13,345 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 75 mSDsluCounter, 915 mSDsCounter, 0 mSdLazyCounter, 1813 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 1813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:21:13,345 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 959 Invalid, 1813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1813 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-14 05:21:13,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5873 states. [2024-11-14 05:21:13,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5873 to 5863. [2024-11-14 05:21:13,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5863 states, 5861 states have (on average 1.2026957857020986) internal successors, (7049), 5862 states have internal predecessors, (7049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:21:13,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5863 states to 5863 states and 7049 transitions. [2024-11-14 05:21:13,399 INFO L78 Accepts]: Start accepts. Automaton has 5863 states and 7049 transitions. Word has length 87 [2024-11-14 05:21:13,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:21:13,399 INFO L471 AbstractCegarLoop]: Abstraction has 5863 states and 7049 transitions. [2024-11-14 05:21:13,399 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 3.2962962962962963) internal successors, (178), 54 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:21:13,399 INFO L276 IsEmpty]: Start isEmpty. Operand 5863 states and 7049 transitions. [2024-11-14 05:21:13,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-14 05:21:13,401 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:21:13,402 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:21:13,417 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-11-14 05:21:13,602 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:21:13,602 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:21:13,602 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:21:13,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1111903882, now seen corresponding path program 25 times [2024-11-14 05:21:13,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:21:13,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033459751] [2024-11-14 05:21:13,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:21:13,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:21:13,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:21:14,956 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 121 proven. 386 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:21:14,956 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:21:14,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033459751] [2024-11-14 05:21:14,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033459751] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:21:14,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689600709] [2024-11-14 05:21:14,957 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:21:14,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:21:14,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:21:14,959 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:21:14,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-14 05:21:15,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:21:15,185 INFO L255 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 132 conjuncts are in the unsatisfiable core [2024-11-14 05:21:15,186 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:21:15,998 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 144 proven. 363 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:21:15,998 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:21:17,034 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 [2024-11-14 05:21:17,440 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 144 proven. 363 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:21:17,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689600709] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:21:17,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [386306115] [2024-11-14 05:21:17,441 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:21:17,441 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:21:17,441 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:21:17,441 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:21:17,441 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:21:17,863 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:21:20,098 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '200818#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_882| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_874| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_882|) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_874|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_882|) (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_874|) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|)))' at error location [2024-11-14 05:21:20,099 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:21:20,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:21:20,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 67 [2024-11-14 05:21:20,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750039] [2024-11-14 05:21:20,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:21:20,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-11-14 05:21:20,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:21:20,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-11-14 05:21:20,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=551, Invalid=5768, Unknown=1, NotChecked=0, Total=6320 [2024-11-14 05:21:20,100 INFO L87 Difference]: Start difference. First operand 5863 states and 7049 transitions. Second operand has 68 states, 67 states have (on average 2.671641791044776) internal successors, (179), 68 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:21:23,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:21:23,194 INFO L93 Difference]: Finished difference Result 6481 states and 7686 transitions. [2024-11-14 05:21:23,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-14 05:21:23,194 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 2.671641791044776) internal successors, (179), 68 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2024-11-14 05:21:23,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:21:23,199 INFO L225 Difference]: With dead ends: 6481 [2024-11-14 05:21:23,199 INFO L226 Difference]: Without dead ends: 6481 [2024-11-14 05:21:23,199 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 199 SyntacticMatches, 14 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4468 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=978, Invalid=10793, Unknown=1, NotChecked=0, Total=11772 [2024-11-14 05:21:23,200 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 414 mSDsluCounter, 1472 mSDsCounter, 0 mSdLazyCounter, 2673 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 1534 SdHoareTripleChecker+Invalid, 2673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-14 05:21:23,200 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 1534 Invalid, 2673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2673 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-14 05:21:23,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6481 states. [2024-11-14 05:21:23,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6481 to 5947. [2024-11-14 05:21:23,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5947 states, 5945 states have (on average 1.2031959629941127) internal successors, (7153), 5946 states have internal predecessors, (7153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:21:23,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5947 states to 5947 states and 7153 transitions. [2024-11-14 05:21:23,270 INFO L78 Accepts]: Start accepts. Automaton has 5947 states and 7153 transitions. Word has length 87 [2024-11-14 05:21:23,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:21:23,270 INFO L471 AbstractCegarLoop]: Abstraction has 5947 states and 7153 transitions. [2024-11-14 05:21:23,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 2.671641791044776) internal successors, (179), 68 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:21:23,270 INFO L276 IsEmpty]: Start isEmpty. Operand 5947 states and 7153 transitions. [2024-11-14 05:21:23,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-11-14 05:21:23,274 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:21:23,274 INFO L215 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:21:23,292 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-11-14 05:21:23,475 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2024-11-14 05:21:23,475 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:21:23,475 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:21:23,476 INFO L85 PathProgramCache]: Analyzing trace with hash 63172495, now seen corresponding path program 26 times [2024-11-14 05:21:23,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:21:23,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913966496] [2024-11-14 05:21:23,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:21:23,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:21:23,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:21:24,837 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 28 proven. 533 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:21:24,837 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:21:24,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913966496] [2024-11-14 05:21:24,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913966496] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:21:24,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564190886] [2024-11-14 05:21:24,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:21:24,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:21:24,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:21:24,839 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:21:24,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-11-14 05:21:25,470 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-11-14 05:21:25,471 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:21:25,475 INFO L255 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 119 conjuncts are in the unsatisfiable core [2024-11-14 05:21:25,477 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:21:25,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 14 treesize of output 10 [2024-11-14 05:21:29,716 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:21:29,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 17 [2024-11-14 05:21:29,967 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 144 proven. 417 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:21:29,967 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:21:33,349 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 13 treesize of output 11 [2024-11-14 05:21:33,355 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 22 treesize of output 20 [2024-11-14 05:21:33,360 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 7 treesize of output 5 [2024-11-14 05:21:33,849 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 144 proven. 417 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:21:33,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564190886] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:21:33,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2082346296] [2024-11-14 05:21:33,850 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:21:33,850 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:21:33,850 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:21:33,850 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:21:33,850 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:21:34,290 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:21:36,703 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '213945#(and (exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_910| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_918| Int)) (and (<= 1 |#StackHeapBarrier|) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_910|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_918|) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_910|) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_918|) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))) (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0))' at error location [2024-11-14 05:21:36,703 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:21:36,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:21:36,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 34, 34] total 89 [2024-11-14 05:21:36,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819193310] [2024-11-14 05:21:36,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:21:36,704 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2024-11-14 05:21:36,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:21:36,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2024-11-14 05:21:36,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=702, Invalid=9397, Unknown=1, NotChecked=0, Total=10100 [2024-11-14 05:21:36,705 INFO L87 Difference]: Start difference. First operand 5947 states and 7153 transitions. Second operand has 89 states, 89 states have (on average 2.730337078651685) internal successors, (243), 89 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:21:41,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 05:25:28,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:25:28,151 INFO L93 Difference]: Finished difference Result 8374 states and 9869 transitions. [2024-11-14 05:25:28,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2024-11-14 05:25:28,151 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.730337078651685) internal successors, (243), 89 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2024-11-14 05:25:28,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:25:28,156 INFO L225 Difference]: With dead ends: 8374 [2024-11-14 05:25:28,156 INFO L226 Difference]: Without dead ends: 7540 [2024-11-14 05:25:28,157 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 194 SyntacticMatches, 14 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9085 ImplicationChecksByTransitivity, 235.6s TimeCoverageRelationStatistics Valid=2886, Invalid=24497, Unknown=7, NotChecked=0, Total=27390 [2024-11-14 05:25:28,157 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 901 mSDsluCounter, 1975 mSDsCounter, 0 mSdLazyCounter, 4106 mSolverCounterSat, 78 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 901 SdHoareTripleChecker+Valid, 2037 SdHoareTripleChecker+Invalid, 4185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 4106 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:25:28,158 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [901 Valid, 2037 Invalid, 4185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 4106 Invalid, 1 Unknown, 0 Unchecked, 5.5s Time] [2024-11-14 05:25:28,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7540 states. [2024-11-14 05:25:28,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7540 to 6695. [2024-11-14 05:25:28,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6695 states, 6693 states have (on average 1.205139698192141) internal successors, (8066), 6694 states have internal predecessors, (8066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:25:28,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6695 states to 6695 states and 8066 transitions. [2024-11-14 05:25:28,224 INFO L78 Accepts]: Start accepts. Automaton has 6695 states and 8066 transitions. Word has length 91 [2024-11-14 05:25:28,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:25:28,224 INFO L471 AbstractCegarLoop]: Abstraction has 6695 states and 8066 transitions. [2024-11-14 05:25:28,224 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.730337078651685) internal successors, (243), 89 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:25:28,224 INFO L276 IsEmpty]: Start isEmpty. Operand 6695 states and 8066 transitions. [2024-11-14 05:25:28,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-11-14 05:25:28,227 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:25:28,227 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2024-11-14 05:25:28,249 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2024-11-14 05:25:28,428 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-11-14 05:25:28,428 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:25:28,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:25:28,428 INFO L85 PathProgramCache]: Analyzing trace with hash 850302496, now seen corresponding path program 20 times [2024-11-14 05:25:28,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:25:28,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804335214] [2024-11-14 05:25:28,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:25:28,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:25:28,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:25:30,298 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 22 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:25:30,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:25:30,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804335214] [2024-11-14 05:25:30,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804335214] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:25:30,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806965007] [2024-11-14 05:25:30,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:25:30,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:25:30,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:25:30,301 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:25:30,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-11-14 05:25:30,757 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-11-14 05:25:30,757 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:25:30,762 INFO L255 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 127 conjuncts are in the unsatisfiable core [2024-11-14 05:25:30,765 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:25:30,774 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 18 treesize of output 16 [2024-11-14 05:25:31,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 05:25:31,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 05:25:31,813 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 22 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:25:31,813 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:25:32,072 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:25:32,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 23 treesize of output 24 [2024-11-14 05:25:32,082 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:25:32,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2024-11-14 05:25:32,318 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 22 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:25:32,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806965007] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:25:32,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [446475137] [2024-11-14 05:25:32,319 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:25:32,319 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:25:32,320 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:25:32,320 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:25:32,320 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:25:33,183 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:25:34,987 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '229156#true' at error location [2024-11-14 05:25:34,987 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:25:34,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:25:34,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 48 [2024-11-14 05:25:34,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902534385] [2024-11-14 05:25:34,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:25:34,988 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-14 05:25:34,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:25:34,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-14 05:25:34,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=3266, Unknown=5, NotChecked=0, Total=3422 [2024-11-14 05:25:34,989 INFO L87 Difference]: Start difference. First operand 6695 states and 8066 transitions. Second operand has 49 states, 49 states have (on average 2.5510204081632653) internal successors, (125), 48 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:25:37,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:25:37,582 INFO L93 Difference]: Finished difference Result 12400 states and 14833 transitions. [2024-11-14 05:25:37,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-14 05:25:37,583 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.5510204081632653) internal successors, (125), 48 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2024-11-14 05:25:37,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:25:37,588 INFO L225 Difference]: With dead ends: 12400 [2024-11-14 05:25:37,588 INFO L226 Difference]: Without dead ends: 7444 [2024-11-14 05:25:37,588 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=210, Invalid=4615, Unknown=5, NotChecked=0, Total=4830 [2024-11-14 05:25:37,589 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 30 mSDsluCounter, 2099 mSDsCounter, 0 mSdLazyCounter, 2898 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 2155 SdHoareTripleChecker+Invalid, 2908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-14 05:25:37,589 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 2155 Invalid, 2908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2898 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-14 05:25:37,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7444 states. [2024-11-14 05:25:37,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7444 to 6792. [2024-11-14 05:25:37,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6792 states, 6790 states have (on average 1.204860088365243) internal successors, (8181), 6791 states have internal predecessors, (8181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:25:37,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6792 states to 6792 states and 8181 transitions. [2024-11-14 05:25:37,679 INFO L78 Accepts]: Start accepts. Automaton has 6792 states and 8181 transitions. Word has length 93 [2024-11-14 05:25:37,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:25:37,679 INFO L471 AbstractCegarLoop]: Abstraction has 6792 states and 8181 transitions. [2024-11-14 05:25:37,679 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.5510204081632653) internal successors, (125), 48 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:25:37,679 INFO L276 IsEmpty]: Start isEmpty. Operand 6792 states and 8181 transitions. [2024-11-14 05:25:37,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-11-14 05:25:37,684 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:25:37,684 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2024-11-14 05:25:37,709 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2024-11-14 05:25:37,884 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-11-14 05:25:37,884 INFO L396 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:25:37,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:25:37,885 INFO L85 PathProgramCache]: Analyzing trace with hash -16166200, now seen corresponding path program 21 times [2024-11-14 05:25:37,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:25:37,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035479132] [2024-11-14 05:25:37,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:25:37,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:25:37,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:25:39,001 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 100 proven. 373 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:25:39,001 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:25:39,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035479132] [2024-11-14 05:25:39,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035479132] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:25:39,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4837477] [2024-11-14 05:25:39,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:25:39,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:25:39,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:25:39,003 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:25:39,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-11-14 05:25:39,573 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:25:39,574 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:25:39,578 INFO L255 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 115 conjuncts are in the unsatisfiable core [2024-11-14 05:25:39,581 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:25:40,549 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 100 proven. 373 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:25:40,549 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:25:41,643 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 21 treesize of output 17 [2024-11-14 05:25:42,503 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 100 proven. 373 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:25:42,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4837477] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:25:42,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [711404268] [2024-11-14 05:25:42,504 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:25:42,505 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:25:42,505 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:25:42,505 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:25:42,505 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:25:43,341 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:25:45,142 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '248981#true' at error location [2024-11-14 05:25:45,143 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:25:45,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:25:45,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 67 [2024-11-14 05:25:45,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197884011] [2024-11-14 05:25:45,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:25:45,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-11-14 05:25:45,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:25:45,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-11-14 05:25:45,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=638, Invalid=5524, Unknown=0, NotChecked=0, Total=6162 [2024-11-14 05:25:45,144 INFO L87 Difference]: Start difference. First operand 6792 states and 8181 transitions. Second operand has 69 states, 68 states have (on average 3.2205882352941178) internal successors, (219), 68 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:25:47,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:25:47,220 INFO L93 Difference]: Finished difference Result 7315 states and 8800 transitions. [2024-11-14 05:25:47,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-14 05:25:47,220 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 3.2205882352941178) internal successors, (219), 68 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2024-11-14 05:25:47,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:25:47,225 INFO L225 Difference]: With dead ends: 7315 [2024-11-14 05:25:47,225 INFO L226 Difference]: Without dead ends: 7315 [2024-11-14 05:25:47,225 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2628 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=771, Invalid=7239, Unknown=0, NotChecked=0, Total=8010 [2024-11-14 05:25:47,225 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 96 mSDsluCounter, 959 mSDsCounter, 0 mSdLazyCounter, 1996 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 1996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:25:47,226 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 1007 Invalid, 1996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1996 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-14 05:25:47,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7315 states. [2024-11-14 05:25:47,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7315 to 7304. [2024-11-14 05:25:47,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7304 states, 7302 states have (on average 1.2051492741714598) internal successors, (8800), 7303 states have internal predecessors, (8800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:25:47,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 8800 transitions. [2024-11-14 05:25:47,312 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 8800 transitions. Word has length 95 [2024-11-14 05:25:47,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:25:47,312 INFO L471 AbstractCegarLoop]: Abstraction has 7304 states and 8800 transitions. [2024-11-14 05:25:47,312 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 3.2205882352941178) internal successors, (219), 68 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:25:47,313 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 8800 transitions. [2024-11-14 05:25:47,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-11-14 05:25:47,317 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:25:47,318 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:25:47,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-11-14 05:25:47,518 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:25:47,518 INFO L396 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:25:47,518 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:25:47,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1205763770, now seen corresponding path program 27 times [2024-11-14 05:25:47,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:25:47,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486939105] [2024-11-14 05:25:47,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:25:47,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:25:47,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:25:49,165 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 30 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:25:49,165 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:25:49,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486939105] [2024-11-14 05:25:49,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486939105] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:25:49,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917272279] [2024-11-14 05:25:49,165 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:25:49,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:25:49,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:25:49,167 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:25:49,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-11-14 05:25:49,691 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:25:49,691 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:25:49,695 INFO L255 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 162 conjuncts are in the unsatisfiable core [2024-11-14 05:25:49,697 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:25:50,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 9 [2024-11-14 05:25:50,723 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 30 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:25:50,723 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:25:50,859 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 15 treesize of output 13 [2024-11-14 05:25:50,864 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 16 treesize of output 12 [2024-11-14 05:25:51,051 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 30 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:25:51,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917272279] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:25:51,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1469089545] [2024-11-14 05:25:51,052 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:25:51,052 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:25:51,053 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:25:51,053 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:25:51,053 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:25:51,479 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:25:54,368 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '264901#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_1000| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_1008| Int)) (and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_1008|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_1000|) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_1000|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_1008|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|)))' at error location [2024-11-14 05:25:54,369 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:25:54,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:25:54,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 60 [2024-11-14 05:25:54,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338732985] [2024-11-14 05:25:54,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:25:54,369 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-11-14 05:25:54,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:25:54,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-11-14 05:25:54,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=4907, Unknown=1, NotChecked=0, Total=5112 [2024-11-14 05:25:54,370 INFO L87 Difference]: Start difference. First operand 7304 states and 8800 transitions. Second operand has 60 states, 60 states have (on average 2.283333333333333) internal successors, (137), 60 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:25:58,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:25:58,066 INFO L93 Difference]: Finished difference Result 9423 states and 11238 transitions. [2024-11-14 05:25:58,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-11-14 05:25:58,066 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.283333333333333) internal successors, (137), 60 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2024-11-14 05:25:58,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:25:58,072 INFO L225 Difference]: With dead ends: 9423 [2024-11-14 05:25:58,072 INFO L226 Difference]: Without dead ends: 8439 [2024-11-14 05:25:58,072 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2497 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=407, Invalid=10512, Unknown=1, NotChecked=0, Total=10920 [2024-11-14 05:25:58,073 INFO L432 NwaCegarLoop]: 81 mSDtfsCounter, 239 mSDsluCounter, 2681 mSDsCounter, 0 mSdLazyCounter, 3836 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 2762 SdHoareTripleChecker+Invalid, 3850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 3836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:25:58,073 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 2762 Invalid, 3850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 3836 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-14 05:25:58,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8439 states. [2024-11-14 05:25:58,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8439 to 8076. [2024-11-14 05:25:58,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8076 states, 8074 states have (on average 1.2065890512756998) internal successors, (9742), 8075 states have internal predecessors, (9742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:25:58,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8076 states to 8076 states and 9742 transitions. [2024-11-14 05:25:58,151 INFO L78 Accepts]: Start accepts. Automaton has 8076 states and 9742 transitions. Word has length 97 [2024-11-14 05:25:58,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:25:58,151 INFO L471 AbstractCegarLoop]: Abstraction has 8076 states and 9742 transitions. [2024-11-14 05:25:58,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.283333333333333) internal successors, (137), 60 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:25:58,151 INFO L276 IsEmpty]: Start isEmpty. Operand 8076 states and 9742 transitions. [2024-11-14 05:25:58,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-11-14 05:25:58,156 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:25:58,156 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:25:58,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2024-11-14 05:25:58,356 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:25:58,357 INFO L396 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:25:58,357 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:25:58,357 INFO L85 PathProgramCache]: Analyzing trace with hash 739370464, now seen corresponding path program 28 times [2024-11-14 05:25:58,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:25:58,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573159546] [2024-11-14 05:25:58,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:25:58,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:25:58,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:26:00,312 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 169 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:26:00,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:26:00,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573159546] [2024-11-14 05:26:00,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573159546] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:26:00,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197233964] [2024-11-14 05:26:00,313 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:26:00,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:26:00,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:26:00,315 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:26:00,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-11-14 05:26:00,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:26:00,588 INFO L255 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 150 conjuncts are in the unsatisfiable core [2024-11-14 05:26:00,590 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:26:01,740 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 196 proven. 479 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:26:01,741 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:26:03,199 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 [2024-11-14 05:26:03,934 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 196 proven. 479 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:26:03,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197233964] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:26:03,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1760779654] [2024-11-14 05:26:03,936 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:26:03,936 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:26:03,936 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:26:03,936 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:26:03,936 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:26:04,332 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:26:07,107 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '283142#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_1046| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_1037| Int)) (and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_1046|) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_1037|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_1046|) (= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_1037|) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|)))' at error location [2024-11-14 05:26:07,108 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:26:07,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:26:07,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 75 [2024-11-14 05:26:07,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481957529] [2024-11-14 05:26:07,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:26:07,108 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2024-11-14 05:26:07,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:26:07,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2024-11-14 05:26:07,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=683, Invalid=6972, Unknown=1, NotChecked=0, Total=7656 [2024-11-14 05:26:07,109 INFO L87 Difference]: Start difference. First operand 8076 states and 9742 transitions. Second operand has 76 states, 75 states have (on average 2.7066666666666666) internal successors, (203), 76 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:26:11,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:26:11,344 INFO L93 Difference]: Finished difference Result 8844 states and 10531 transitions. [2024-11-14 05:26:11,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-11-14 05:26:11,345 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 2.7066666666666666) internal successors, (203), 76 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2024-11-14 05:26:11,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:26:11,350 INFO L225 Difference]: With dead ends: 8844 [2024-11-14 05:26:11,350 INFO L226 Difference]: Without dead ends: 8844 [2024-11-14 05:26:11,351 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 229 SyntacticMatches, 16 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5608 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=1202, Invalid=13317, Unknown=1, NotChecked=0, Total=14520 [2024-11-14 05:26:11,351 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 494 mSDsluCounter, 1807 mSDsCounter, 0 mSdLazyCounter, 3317 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 1877 SdHoareTripleChecker+Invalid, 3317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:26:11,352 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [494 Valid, 1877 Invalid, 3317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3317 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-14 05:26:11,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8844 states. [2024-11-14 05:26:11,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8844 to 8168. [2024-11-14 05:26:11,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8168 states, 8166 states have (on average 1.2069556698506) internal successors, (9856), 8167 states have internal predecessors, (9856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:26:11,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8168 states to 8168 states and 9856 transitions. [2024-11-14 05:26:11,438 INFO L78 Accepts]: Start accepts. Automaton has 8168 states and 9856 transitions. Word has length 99 [2024-11-14 05:26:11,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:26:11,439 INFO L471 AbstractCegarLoop]: Abstraction has 8168 states and 9856 transitions. [2024-11-14 05:26:11,439 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 75 states have (on average 2.7066666666666666) internal successors, (203), 76 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:26:11,439 INFO L276 IsEmpty]: Start isEmpty. Operand 8168 states and 9856 transitions. [2024-11-14 05:26:11,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-11-14 05:26:11,444 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:26:11,444 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1] [2024-11-14 05:26:11,467 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2024-11-14 05:26:11,644 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:26:11,644 INFO L396 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:26:11,645 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:26:11,645 INFO L85 PathProgramCache]: Analyzing trace with hash -987011603, now seen corresponding path program 22 times [2024-11-14 05:26:11,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:26:11,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243258873] [2024-11-14 05:26:11,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:26:11,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:26:11,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:26:14,049 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 24 proven. 517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:26:14,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:26:14,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243258873] [2024-11-14 05:26:14,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243258873] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:26:14,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684423735] [2024-11-14 05:26:14,050 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:26:14,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:26:14,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:26:14,052 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:26:14,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-11-14 05:26:14,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:26:14,384 INFO L255 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 139 conjuncts are in the unsatisfiable core [2024-11-14 05:26:14,387 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:26:14,392 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 10 treesize of output 8 [2024-11-14 05:26:15,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 05:26:15,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 05:26:15,771 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 24 proven. 517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:26:15,771 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:26:16,099 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:26:16,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 23 treesize of output 24 [2024-11-14 05:26:16,108 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:26:16,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2024-11-14 05:26:16,434 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 24 proven. 517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:26:16,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684423735] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:26:16,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [918147861] [2024-11-14 05:26:16,435 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:26:16,435 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:26:16,436 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:26:16,436 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:26:16,436 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:26:17,241 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:26:20,315 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '300887#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_408| Int) (|v_ULTIMATE.start_cstrcspn_#t~post2#1.base_402| Int)) (and (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_408|) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post2#1.base_402|) |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_408|)))' at error location [2024-11-14 05:26:20,316 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:26:20,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:26:20,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 31, 31] total 54 [2024-11-14 05:26:20,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599217455] [2024-11-14 05:26:20,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:26:20,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-11-14 05:26:20,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:26:20,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-11-14 05:26:20,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=4254, Unknown=15, NotChecked=0, Total=4422 [2024-11-14 05:26:20,318 INFO L87 Difference]: Start difference. First operand 8168 states and 9856 transitions. Second operand has 55 states, 55 states have (on average 2.5090909090909093) internal successors, (138), 54 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:26:25,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:26:25,304 INFO L93 Difference]: Finished difference Result 15182 states and 18203 transitions. [2024-11-14 05:26:25,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-14 05:26:25,305 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.5090909090909093) internal successors, (138), 54 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2024-11-14 05:26:25,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:26:25,310 INFO L225 Difference]: With dead ends: 15182 [2024-11-14 05:26:25,311 INFO L226 Difference]: Without dead ends: 9032 [2024-11-14 05:26:25,311 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=300, Invalid=8614, Unknown=16, NotChecked=0, Total=8930 [2024-11-14 05:26:25,311 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 37 mSDsluCounter, 2675 mSDsCounter, 0 mSdLazyCounter, 3886 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2736 SdHoareTripleChecker+Invalid, 3897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 3886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:26:25,311 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 2736 Invalid, 3897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 3886 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-11-14 05:26:25,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9032 states. [2024-11-14 05:26:25,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9032 to 8271. [2024-11-14 05:26:25,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8271 states, 8269 states have (on average 1.206675535131213) internal successors, (9978), 8270 states have internal predecessors, (9978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:26:25,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8271 states to 8271 states and 9978 transitions. [2024-11-14 05:26:25,385 INFO L78 Accepts]: Start accepts. Automaton has 8271 states and 9978 transitions. Word has length 101 [2024-11-14 05:26:25,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:26:25,386 INFO L471 AbstractCegarLoop]: Abstraction has 8271 states and 9978 transitions. [2024-11-14 05:26:25,386 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.5090909090909093) internal successors, (138), 54 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:26:25,386 INFO L276 IsEmpty]: Start isEmpty. Operand 8271 states and 9978 transitions. [2024-11-14 05:26:25,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-14 05:26:25,389 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:26:25,389 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2024-11-14 05:26:25,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2024-11-14 05:26:25,590 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2024-11-14 05:26:25,590 INFO L396 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:26:25,590 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:26:25,590 INFO L85 PathProgramCache]: Analyzing trace with hash 636680853, now seen corresponding path program 23 times [2024-11-14 05:26:25,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:26:25,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110309922] [2024-11-14 05:26:25,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:26:25,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:26:25,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:26:26,994 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 121 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:26:26,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:26:26,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110309922] [2024-11-14 05:26:26,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110309922] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:26:26,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630019055] [2024-11-14 05:26:26,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:26:26,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:26:26,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:26:26,996 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:26:26,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-11-14 05:26:27,528 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-11-14 05:26:27,528 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:26:27,533 INFO L255 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 99 conjuncts are in the unsatisfiable core [2024-11-14 05:26:27,536 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:26:29,045 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 121 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:26:29,046 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:26:30,631 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 7 treesize of output 5 [2024-11-14 05:26:31,166 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 121 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:26:31,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630019055] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:26:31,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [168239481] [2024-11-14 05:26:31,168 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:26:31,168 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:26:31,168 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:26:31,168 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:26:31,168 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:26:31,959 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:26:34,483 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '325096#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post2#1.base_421| Int) (|v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_428| Int)) (and (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post2#1.base_421|) |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_428|) (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_428|) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|)))' at error location [2024-11-14 05:26:34,483 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:26:34,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:26:34,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 74 [2024-11-14 05:26:34,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875214053] [2024-11-14 05:26:34,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:26:34,483 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2024-11-14 05:26:34,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:26:34,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2024-11-14 05:26:34,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=837, Invalid=6819, Unknown=0, NotChecked=0, Total=7656 [2024-11-14 05:26:34,485 INFO L87 Difference]: Start difference. First operand 8271 states and 9978 transitions. Second operand has 76 states, 75 states have (on average 3.76) internal successors, (282), 75 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:26:36,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:26:36,762 INFO L93 Difference]: Finished difference Result 8861 states and 10678 transitions. [2024-11-14 05:26:36,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-14 05:26:36,763 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 3.76) internal successors, (282), 75 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2024-11-14 05:26:36,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:26:36,769 INFO L225 Difference]: With dead ends: 8861 [2024-11-14 05:26:36,769 INFO L226 Difference]: Without dead ends: 8861 [2024-11-14 05:26:36,769 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 237 SyntacticMatches, 13 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4246 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1105, Invalid=8995, Unknown=0, NotChecked=0, Total=10100 [2024-11-14 05:26:36,770 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 101 mSDsluCounter, 1208 mSDsCounter, 0 mSdLazyCounter, 1971 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 1260 SdHoareTripleChecker+Invalid, 1971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:26:36,770 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 1260 Invalid, 1971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1971 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-14 05:26:36,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8861 states. [2024-11-14 05:26:36,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8861 to 8849. [2024-11-14 05:26:36,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8849 states, 8847 states have (on average 1.206962812252741) internal successors, (10678), 8848 states have internal predecessors, (10678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:26:36,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8849 states to 8849 states and 10678 transitions. [2024-11-14 05:26:36,840 INFO L78 Accepts]: Start accepts. Automaton has 8849 states and 10678 transitions. Word has length 103 [2024-11-14 05:26:36,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:26:36,841 INFO L471 AbstractCegarLoop]: Abstraction has 8849 states and 10678 transitions. [2024-11-14 05:26:36,841 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 75 states have (on average 3.76) internal successors, (282), 75 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:26:36,841 INFO L276 IsEmpty]: Start isEmpty. Operand 8849 states and 10678 transitions. [2024-11-14 05:26:36,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-14 05:26:36,844 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:26:36,844 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:26:36,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2024-11-14 05:26:37,044 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:26:37,045 INFO L396 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:26:37,045 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:26:37,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1688726501, now seen corresponding path program 29 times [2024-11-14 05:26:37,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:26:37,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499669682] [2024-11-14 05:26:37,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:26:37,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:26:37,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:26:39,102 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 32 proven. 705 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:26:39,102 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:26:39,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499669682] [2024-11-14 05:26:39,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499669682] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:26:39,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276310868] [2024-11-14 05:26:39,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:26:39,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:26:39,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:26:39,105 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:26:39,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-11-14 05:26:40,156 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2024-11-14 05:26:40,156 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:26:40,164 INFO L255 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 194 conjuncts are in the unsatisfiable core [2024-11-14 05:26:40,167 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:26:40,177 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 18 treesize of output 16 [2024-11-14 05:26:42,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-14 05:26:42,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2024-11-14 05:26:47,696 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 32 proven. 705 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:26:47,696 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:26:50,117 WARN L851 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~nondetString2~0#1.offset| Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |ULTIMATE.start_main_~nondetString2~0#1.offset| |c_ULTIMATE.start_main_~length2~0#1|) 0) (+ |ULTIMATE.start_main_~nondetString2~0#1.offset| 15)) 0)) is different from false [2024-11-14 05:26:50,128 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:26:50,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 26 treesize of output 27 [2024-11-14 05:26:50,139 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:26:50,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2024-11-14 05:26:50,147 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 16 treesize of output 12 [2024-11-14 05:26:50,167 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:26:50,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 37 [2024-11-14 05:26:52,700 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 32 proven. 705 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:26:52,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276310868] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:26:52,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1715704951] [2024-11-14 05:26:52,701 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:26:52,701 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:26:52,702 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:26:52,702 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:26:52,702 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:26:53,190 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:26:57,776 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '343557#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_1144| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_1135| Int)) (and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_1135|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_1144|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_1144|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_1135|) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|)))' at error location [2024-11-14 05:26:57,777 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:26:57,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:26:57,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 41, 40] total 101 [2024-11-14 05:26:57,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903610915] [2024-11-14 05:26:57,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:26:57,777 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2024-11-14 05:26:57,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:26:57,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2024-11-14 05:26:57,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=12106, Unknown=2, NotChecked=220, Total=12656 [2024-11-14 05:26:57,778 INFO L87 Difference]: Start difference. First operand 8849 states and 10678 transitions. Second operand has 101 states, 101 states have (on average 2.386138613861386) internal successors, (241), 101 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:27:13,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:27:13,487 INFO L93 Difference]: Finished difference Result 11366 states and 13567 transitions. [2024-11-14 05:27:13,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2024-11-14 05:27:13,487 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.386138613861386) internal successors, (241), 101 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2024-11-14 05:27:13,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:27:13,493 INFO L225 Difference]: With dead ends: 11366 [2024-11-14 05:27:13,493 INFO L226 Difference]: Without dead ends: 10156 [2024-11-14 05:27:13,494 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 237 SyntacticMatches, 1 SemanticMatches, 200 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 9710 ImplicationChecksByTransitivity, 25.0s TimeCoverageRelationStatistics Valid=957, Invalid=39245, Unknown=2, NotChecked=398, Total=40602 [2024-11-14 05:27:13,494 INFO L432 NwaCegarLoop]: 83 mSDtfsCounter, 228 mSDsluCounter, 4419 mSDsCounter, 0 mSdLazyCounter, 6726 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 4502 SdHoareTripleChecker+Invalid, 7043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 6726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 288 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:27:13,494 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 4502 Invalid, 7043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 6726 Invalid, 0 Unknown, 288 Unchecked, 6.3s Time] [2024-11-14 05:27:13,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10156 states. [2024-11-14 05:27:13,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10156 to 9737. [2024-11-14 05:27:13,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9737 states, 9735 states have (on average 1.2083204930662559) internal successors, (11763), 9736 states have internal predecessors, (11763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:27:13,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9737 states to 9737 states and 11763 transitions. [2024-11-14 05:27:13,560 INFO L78 Accepts]: Start accepts. Automaton has 9737 states and 11763 transitions. Word has length 103 [2024-11-14 05:27:13,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:27:13,560 INFO L471 AbstractCegarLoop]: Abstraction has 9737 states and 11763 transitions. [2024-11-14 05:27:13,560 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.386138613861386) internal successors, (241), 101 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:27:13,560 INFO L276 IsEmpty]: Start isEmpty. Operand 9737 states and 11763 transitions. [2024-11-14 05:27:13,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-11-14 05:27:13,563 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:27:13,563 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:27:13,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2024-11-14 05:27:13,763 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:27:13,763 INFO L396 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:27:13,764 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:27:13,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1835082101, now seen corresponding path program 30 times [2024-11-14 05:27:13,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:27:13,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935664498] [2024-11-14 05:27:13,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:27:13,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:27:13,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:27:15,795 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 196 proven. 572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:27:15,795 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:27:15,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935664498] [2024-11-14 05:27:15,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935664498] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:27:15,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231944868] [2024-11-14 05:27:15,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:27:15,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:27:15,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:27:15,797 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:27:15,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-11-14 05:27:17,219 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:27:17,220 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:27:17,225 INFO L255 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 162 conjuncts are in the unsatisfiable core [2024-11-14 05:27:17,228 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:27:18,827 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 225 proven. 543 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:27:18,827 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:27:20,626 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 21 treesize of output 17 [2024-11-14 05:27:22,240 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 225 proven. 543 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:27:22,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231944868] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:27:22,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [554196712] [2024-11-14 05:27:22,241 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:27:22,241 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:27:22,241 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:27:22,241 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:27:22,242 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:27:22,675 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:27:26,005 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '365573#(and (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_1174| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_1183| Int)) (and (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_1174|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_1183|) (<= 1 |#StackHeapBarrier|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_1174|) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_1183|) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))))' at error location [2024-11-14 05:27:26,005 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:27:26,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:27:26,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 95 [2024-11-14 05:27:26,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653336643] [2024-11-14 05:27:26,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:27:26,006 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2024-11-14 05:27:26,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:27:26,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2024-11-14 05:27:26,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1290, Invalid=10481, Unknown=1, NotChecked=0, Total=11772 [2024-11-14 05:27:26,007 INFO L87 Difference]: Start difference. First operand 9737 states and 11763 transitions. Second operand has 97 states, 96 states have (on average 2.6145833333333335) internal successors, (251), 96 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:27:31,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:27:31,647 INFO L93 Difference]: Finished difference Result 10622 states and 12671 transitions. [2024-11-14 05:27:31,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-11-14 05:27:31,648 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 96 states have (on average 2.6145833333333335) internal successors, (251), 96 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2024-11-14 05:27:31,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:27:31,655 INFO L225 Difference]: With dead ends: 10622 [2024-11-14 05:27:31,655 INFO L226 Difference]: Without dead ends: 10622 [2024-11-14 05:27:31,656 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6923 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=1873, Invalid=18718, Unknown=1, NotChecked=0, Total=20592 [2024-11-14 05:27:31,656 INFO L432 NwaCegarLoop]: 72 mSDtfsCounter, 363 mSDsluCounter, 1990 mSDsCounter, 0 mSdLazyCounter, 3706 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 2062 SdHoareTripleChecker+Invalid, 3706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-11-14 05:27:31,656 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [363 Valid, 2062 Invalid, 3706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3706 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-11-14 05:27:31,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10622 states. [2024-11-14 05:27:31,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10622 to 9837. [2024-11-14 05:27:31,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9837 states, 9835 states have (on average 1.2086426029486528) internal successors, (11887), 9836 states have internal predecessors, (11887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:27:31,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9837 states to 9837 states and 11887 transitions. [2024-11-14 05:27:31,749 INFO L78 Accepts]: Start accepts. Automaton has 9837 states and 11887 transitions. Word has length 105 [2024-11-14 05:27:31,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:27:31,749 INFO L471 AbstractCegarLoop]: Abstraction has 9837 states and 11887 transitions. [2024-11-14 05:27:31,750 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 96 states have (on average 2.6145833333333335) internal successors, (251), 96 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:27:31,750 INFO L276 IsEmpty]: Start isEmpty. Operand 9837 states and 11887 transitions. [2024-11-14 05:27:31,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-11-14 05:27:31,753 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:27:31,753 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1] [2024-11-14 05:27:31,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2024-11-14 05:27:31,953 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2024-11-14 05:27:31,953 INFO L396 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:27:31,954 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:27:31,954 INFO L85 PathProgramCache]: Analyzing trace with hash -430358534, now seen corresponding path program 24 times [2024-11-14 05:27:31,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:27:31,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456903458] [2024-11-14 05:27:31,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:27:31,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:27:31,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:27:34,619 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 26 proven. 612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:27:34,619 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:27:34,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456903458] [2024-11-14 05:27:34,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456903458] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:27:34,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550961089] [2024-11-14 05:27:34,619 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:27:34,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:27:34,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:27:34,621 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:27:34,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-11-14 05:27:35,157 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:27:35,158 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:27:35,163 INFO L255 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 164 conjuncts are in the unsatisfiable core [2024-11-14 05:27:35,166 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:27:36,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2024-11-14 05:27:36,407 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-14 05:27:36,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-11-14 05:27:39,719 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 26 proven. 612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:27:39,719 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:27:40,653 WARN L851 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int) (v_ArrVal_2609 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2609) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (not (= (select v_ArrVal_2609 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) 0)) (= 0 (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) (= (select .cse0 (+ 12 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)))) is different from false [2024-11-14 05:27:40,663 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:27:40,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 45 treesize of output 34 [2024-11-14 05:27:40,681 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:27:40,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 57 [2024-11-14 05:27:40,710 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:27:40,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 37 [2024-11-14 05:27:43,326 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 32 proven. 606 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:27:43,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550961089] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:27:43,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1199327761] [2024-11-14 05:27:43,327 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:27:43,327 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:27:43,327 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:27:43,328 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:27:43,328 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:27:44,040 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:27:47,070 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '386114#true' at error location [2024-11-14 05:27:47,070 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:27:47,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:27:47,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 38, 38] total 94 [2024-11-14 05:27:47,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789359101] [2024-11-14 05:27:47,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:27:47,071 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2024-11-14 05:27:47,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:27:47,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2024-11-14 05:27:47,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=10397, Unknown=1, NotChecked=204, Total=10920 [2024-11-14 05:27:47,073 INFO L87 Difference]: Start difference. First operand 9837 states and 11887 transitions. Second operand has 95 states, 95 states have (on average 2.6) internal successors, (247), 94 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:27:54,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:27:54,050 INFO L93 Difference]: Finished difference Result 25455 states and 30658 transitions. [2024-11-14 05:27:54,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2024-11-14 05:27:54,051 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.6) internal successors, (247), 94 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2024-11-14 05:27:54,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:27:54,059 INFO L225 Difference]: With dead ends: 25455 [2024-11-14 05:27:54,059 INFO L226 Difference]: Without dead ends: 11635 [2024-11-14 05:27:54,060 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 259 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2976 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=405, Invalid=13170, Unknown=1, NotChecked=230, Total=13806 [2024-11-14 05:27:54,060 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 100 mSDsluCounter, 3850 mSDsCounter, 0 mSdLazyCounter, 6154 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 3914 SdHoareTripleChecker+Invalid, 6521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 6154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 352 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:27:54,060 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 3914 Invalid, 6521 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [15 Valid, 6154 Invalid, 0 Unknown, 352 Unchecked, 5.5s Time] [2024-11-14 05:27:54,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11635 states. [2024-11-14 05:27:54,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11635 to 9946. [2024-11-14 05:27:54,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9946 states, 9944 states have (on average 1.2083668543845536) internal successors, (12016), 9945 states have internal predecessors, (12016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:27:54,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9946 states to 9946 states and 12016 transitions. [2024-11-14 05:27:54,207 INFO L78 Accepts]: Start accepts. Automaton has 9946 states and 12016 transitions. Word has length 109 [2024-11-14 05:27:54,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:27:54,207 INFO L471 AbstractCegarLoop]: Abstraction has 9946 states and 12016 transitions. [2024-11-14 05:27:54,207 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.6) internal successors, (247), 94 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:27:54,207 INFO L276 IsEmpty]: Start isEmpty. Operand 9946 states and 12016 transitions. [2024-11-14 05:27:54,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-11-14 05:27:54,212 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:27:54,212 INFO L215 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:27:54,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2024-11-14 05:27:54,412 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2024-11-14 05:27:54,412 INFO L396 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:27:54,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:27:54,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1432524560, now seen corresponding path program 31 times [2024-11-14 05:27:54,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:27:54,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114503799] [2024-11-14 05:27:54,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:27:54,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:27:54,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:27:56,503 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 34 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:27:56,503 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:27:56,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114503799] [2024-11-14 05:27:56,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114503799] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:27:56,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198402515] [2024-11-14 05:27:56,504 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:27:56,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:27:56,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:27:56,507 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:27:56,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2024-11-14 05:27:56,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:27:56,892 INFO L255 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 182 conjuncts are in the unsatisfiable core [2024-11-14 05:27:56,895 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:27:57,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 9 [2024-11-14 05:27:58,298 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 34 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:27:58,299 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:27:58,471 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 15 treesize of output 13 [2024-11-14 05:27:58,473 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 16 treesize of output 12 [2024-11-14 05:27:58,717 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 34 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:27:58,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198402515] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:27:58,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1103510147] [2024-11-14 05:27:58,719 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:27:58,719 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:27:58,719 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:27:58,719 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:27:58,719 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:27:59,354 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:28:02,798 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '423009#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_1256| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_1247| Int)) (and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_1247|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_1256|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_1256|) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_1247|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|)))' at error location [2024-11-14 05:28:02,798 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:28:02,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:28:02,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 66 [2024-11-14 05:28:02,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250580461] [2024-11-14 05:28:02,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:28:02,799 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-11-14 05:28:02,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:28:02,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-11-14 05:28:02,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=5785, Unknown=1, NotChecked=0, Total=6006 [2024-11-14 05:28:02,800 INFO L87 Difference]: Start difference. First operand 9946 states and 12016 transitions. Second operand has 66 states, 66 states have (on average 2.3181818181818183) internal successors, (153), 66 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:28:08,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:28:08,834 INFO L93 Difference]: Finished difference Result 12655 states and 15138 transitions. [2024-11-14 05:28:08,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-11-14 05:28:08,835 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.3181818181818183) internal successors, (153), 66 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2024-11-14 05:28:08,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:28:08,843 INFO L225 Difference]: With dead ends: 12655 [2024-11-14 05:28:08,843 INFO L226 Difference]: Without dead ends: 11335 [2024-11-14 05:28:08,843 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2984 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=447, Invalid=12662, Unknown=1, NotChecked=0, Total=13110 [2024-11-14 05:28:08,844 INFO L432 NwaCegarLoop]: 91 mSDtfsCounter, 268 mSDsluCounter, 3733 mSDsCounter, 0 mSdLazyCounter, 5165 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 3824 SdHoareTripleChecker+Invalid, 5181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 5165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2024-11-14 05:28:08,844 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 3824 Invalid, 5181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 5165 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2024-11-14 05:28:08,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11335 states. [2024-11-14 05:28:08,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11335 to 10888. [2024-11-14 05:28:08,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10888 states, 10886 states have (on average 1.2096270439096086) internal successors, (13168), 10887 states have internal predecessors, (13168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:28:08,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10888 states to 10888 states and 13168 transitions. [2024-11-14 05:28:08,936 INFO L78 Accepts]: Start accepts. Automaton has 10888 states and 13168 transitions. Word has length 109 [2024-11-14 05:28:08,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:28:08,936 INFO L471 AbstractCegarLoop]: Abstraction has 10888 states and 13168 transitions. [2024-11-14 05:28:08,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.3181818181818183) internal successors, (153), 66 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:28:08,937 INFO L276 IsEmpty]: Start isEmpty. Operand 10888 states and 13168 transitions. [2024-11-14 05:28:08,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-11-14 05:28:08,941 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:28:08,941 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2024-11-14 05:28:08,957 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2024-11-14 05:28:09,141 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2024-11-14 05:28:09,141 INFO L396 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:28:09,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:28:09,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1832234146, now seen corresponding path program 25 times [2024-11-14 05:28:09,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:28:09,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271095917] [2024-11-14 05:28:09,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:28:09,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:28:09,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:28:10,934 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 144 proven. 519 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:28:10,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:28:10,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271095917] [2024-11-14 05:28:10,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271095917] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:28:10,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489184110] [2024-11-14 05:28:10,934 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:28:10,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:28:10,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:28:10,937 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:28:10,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2024-11-14 05:28:11,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:28:11,302 INFO L255 TraceCheckSpWp]: Trace formula consists of 703 conjuncts, 130 conjuncts are in the unsatisfiable core [2024-11-14 05:28:11,304 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:28:12,539 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 144 proven. 519 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:28:12,540 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:28:14,012 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 [2024-11-14 05:28:14,629 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 144 proven. 519 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:28:14,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489184110] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:28:14,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [122297379] [2024-11-14 05:28:14,630 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:28:14,630 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:28:14,630 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:28:14,630 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:28:14,630 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:28:15,598 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:28:17,652 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '446638#true' at error location [2024-11-14 05:28:17,652 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:28:17,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:28:17,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 65 [2024-11-14 05:28:17,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804450194] [2024-11-14 05:28:17,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:28:17,653 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-11-14 05:28:17,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:28:17,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-11-14 05:28:17,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=537, Invalid=5315, Unknown=0, NotChecked=0, Total=5852 [2024-11-14 05:28:17,654 INFO L87 Difference]: Start difference. First operand 10888 states and 13168 transitions. Second operand has 67 states, 66 states have (on average 3.4242424242424243) internal successors, (226), 66 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:28:20,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:28:20,472 INFO L93 Difference]: Finished difference Result 11619 states and 14040 transitions. [2024-11-14 05:28:20,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-14 05:28:20,473 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 3.4242424242424243) internal successors, (226), 66 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2024-11-14 05:28:20,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:28:20,480 INFO L225 Difference]: With dead ends: 11619 [2024-11-14 05:28:20,481 INFO L226 Difference]: Without dead ends: 11619 [2024-11-14 05:28:20,481 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 273 SyntacticMatches, 14 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3290 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=713, Invalid=7477, Unknown=0, NotChecked=0, Total=8190 [2024-11-14 05:28:20,481 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 154 mSDsluCounter, 1124 mSDsCounter, 0 mSdLazyCounter, 2384 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 2384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-14 05:28:20,481 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 1180 Invalid, 2384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2384 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-14 05:28:20,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11619 states. [2024-11-14 05:28:20,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11619 to 11606. [2024-11-14 05:28:20,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11606 states, 11604 states have (on average 1.2099276111685626) internal successors, (14040), 11605 states have internal predecessors, (14040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:28:20,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11606 states to 11606 states and 14040 transitions. [2024-11-14 05:28:20,582 INFO L78 Accepts]: Start accepts. Automaton has 11606 states and 14040 transitions. Word has length 111 [2024-11-14 05:28:20,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:28:20,583 INFO L471 AbstractCegarLoop]: Abstraction has 11606 states and 14040 transitions. [2024-11-14 05:28:20,583 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 3.4242424242424243) internal successors, (226), 66 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:28:20,583 INFO L276 IsEmpty]: Start isEmpty. Operand 11606 states and 14040 transitions. [2024-11-14 05:28:20,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-11-14 05:28:20,588 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:28:20,589 INFO L215 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:28:20,616 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2024-11-14 05:28:20,789 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2024-11-14 05:28:20,789 INFO L396 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:28:20,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:28:20,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1540983498, now seen corresponding path program 32 times [2024-11-14 05:28:20,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:28:20,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764546062] [2024-11-14 05:28:20,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:28:20,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:28:20,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:28:23,028 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 225 proven. 642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:28:23,029 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:28:23,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764546062] [2024-11-14 05:28:23,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764546062] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:28:23,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908154986] [2024-11-14 05:28:23,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:28:23,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:28:23,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:28:23,032 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:28:23,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2024-11-14 05:28:23,799 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2024-11-14 05:28:23,799 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:28:23,806 INFO L255 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 137 conjuncts are in the unsatisfiable core [2024-11-14 05:28:23,809 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:28:23,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-14 05:28:26,193 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 256 proven. 611 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:28:26,194 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:28:30,529 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 256 proven. 611 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:28:30,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908154986] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:28:30,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [837705895] [2024-11-14 05:28:30,530 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:28:30,530 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:28:30,530 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:28:30,530 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:28:30,530 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:28:30,987 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:28:34,681 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '471408#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_1318| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_1328| Int)) (and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_1318|) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_1318|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_1328|) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_1328|) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|)))' at error location [2024-11-14 05:28:34,681 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:28:34,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:28:34,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 119 [2024-11-14 05:28:34,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336960951] [2024-11-14 05:28:34,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:28:34,681 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2024-11-14 05:28:34,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:28:34,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2024-11-14 05:28:34,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1979, Invalid=15312, Unknown=1, NotChecked=0, Total=17292 [2024-11-14 05:28:34,683 INFO L87 Difference]: Start difference. First operand 11606 states and 14040 transitions. Second operand has 120 states, 119 states have (on average 2.7899159663865545) internal successors, (332), 120 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:28:40,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:28:40,045 INFO L93 Difference]: Finished difference Result 12616 states and 15075 transitions. [2024-11-14 05:28:40,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-11-14 05:28:40,045 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 119 states have (on average 2.7899159663865545) internal successors, (332), 120 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2024-11-14 05:28:40,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:28:40,054 INFO L225 Difference]: With dead ends: 12616 [2024-11-14 05:28:40,054 INFO L226 Difference]: Without dead ends: 12616 [2024-11-14 05:28:40,056 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9968 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=3003, Invalid=25388, Unknown=1, NotChecked=0, Total=28392 [2024-11-14 05:28:40,056 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 540 mSDsluCounter, 1627 mSDsCounter, 0 mSdLazyCounter, 2572 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 1705 SdHoareTripleChecker+Invalid, 2572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:28:40,056 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [540 Valid, 1705 Invalid, 2572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2572 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-14 05:28:40,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12616 states. [2024-11-14 05:28:40,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12616 to 11714. [2024-11-14 05:28:40,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11714 states, 11712 states have (on average 1.2102117486338797) internal successors, (14174), 11713 states have internal predecessors, (14174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:28:40,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11714 states to 11714 states and 14174 transitions. [2024-11-14 05:28:40,177 INFO L78 Accepts]: Start accepts. Automaton has 11714 states and 14174 transitions. Word has length 111 [2024-11-14 05:28:40,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:28:40,177 INFO L471 AbstractCegarLoop]: Abstraction has 11714 states and 14174 transitions. [2024-11-14 05:28:40,177 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 119 states have (on average 2.7899159663865545) internal successors, (332), 120 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:28:40,178 INFO L276 IsEmpty]: Start isEmpty. Operand 11714 states and 14174 transitions. [2024-11-14 05:28:40,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-11-14 05:28:40,184 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:28:40,185 INFO L215 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:28:40,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2024-11-14 05:28:40,385 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:28:40,385 INFO L396 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:28:40,385 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:28:40,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1768366021, now seen corresponding path program 33 times [2024-11-14 05:28:40,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:28:40,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190661507] [2024-11-14 05:28:40,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:28:40,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:28:40,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:28:42,664 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 36 proven. 901 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:28:42,664 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:28:42,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190661507] [2024-11-14 05:28:42,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190661507] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:28:42,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303707713] [2024-11-14 05:28:42,664 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:28:42,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:28:42,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:28:42,667 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:28:42,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2024-11-14 05:28:43,293 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:28:43,293 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:28:43,299 INFO L255 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 190 conjuncts are in the unsatisfiable core [2024-11-14 05:28:43,302 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:28:44,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 9 [2024-11-14 05:28:44,760 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 36 proven. 901 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:28:44,760 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:28:44,902 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 15 treesize of output 13 [2024-11-14 05:28:44,904 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 16 treesize of output 12 [2024-11-14 05:28:45,090 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 36 proven. 901 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:28:45,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303707713] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:28:45,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [346846339] [2024-11-14 05:28:45,092 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:28:45,092 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:28:45,092 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:28:45,092 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:28:45,092 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:28:45,498 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:28:48,597 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '496577#(and (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_1362| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_1372| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_1372|) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_1362|) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_1362|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_1372|) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))) (= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0))' at error location [2024-11-14 05:28:48,598 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:28:48,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:28:48,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 69 [2024-11-14 05:28:48,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437883354] [2024-11-14 05:28:48,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:28:48,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-11-14 05:28:48,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:28:48,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-11-14 05:28:48,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=6251, Unknown=1, NotChecked=0, Total=6480 [2024-11-14 05:28:48,600 INFO L87 Difference]: Start difference. First operand 11714 states and 14174 transitions. Second operand has 69 states, 69 states have (on average 2.3333333333333335) internal successors, (161), 69 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:28:55,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:28:55,445 INFO L93 Difference]: Finished difference Result 14686 states and 17601 transitions. [2024-11-14 05:28:55,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-11-14 05:28:55,446 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.3333333333333335) internal successors, (161), 69 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2024-11-14 05:28:55,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:28:55,456 INFO L225 Difference]: With dead ends: 14686 [2024-11-14 05:28:55,456 INFO L226 Difference]: Without dead ends: 13290 [2024-11-14 05:28:55,456 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3244 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=467, Invalid=13812, Unknown=1, NotChecked=0, Total=14280 [2024-11-14 05:28:55,457 INFO L432 NwaCegarLoop]: 96 mSDtfsCounter, 174 mSDsluCounter, 4485 mSDsCounter, 0 mSdLazyCounter, 6017 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 4581 SdHoareTripleChecker+Invalid, 6034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 6017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:28:55,457 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 4581 Invalid, 6034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 6017 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2024-11-14 05:28:55,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13290 states. [2024-11-14 05:28:55,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13290 to 12782. [2024-11-14 05:28:55,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12782 states, 12780 states have (on average 1.2114241001564945) internal successors, (15482), 12781 states have internal predecessors, (15482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:28:55,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12782 states to 12782 states and 15482 transitions. [2024-11-14 05:28:55,620 INFO L78 Accepts]: Start accepts. Automaton has 12782 states and 15482 transitions. Word has length 115 [2024-11-14 05:28:55,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:28:55,620 INFO L471 AbstractCegarLoop]: Abstraction has 12782 states and 15482 transitions. [2024-11-14 05:28:55,620 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.3333333333333335) internal successors, (161), 69 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:28:55,620 INFO L276 IsEmpty]: Start isEmpty. Operand 12782 states and 15482 transitions. [2024-11-14 05:28:55,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-11-14 05:28:55,624 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:28:55,624 INFO L215 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1] [2024-11-14 05:28:55,643 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2024-11-14 05:28:55,825 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2024-11-14 05:28:55,825 INFO L396 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:28:55,826 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:28:55,826 INFO L85 PathProgramCache]: Analyzing trace with hash -117476281, now seen corresponding path program 26 times [2024-11-14 05:28:55,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:28:55,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510878055] [2024-11-14 05:28:55,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:28:55,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:28:55,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:28:58,625 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 28 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:28:58,625 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:28:58,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510878055] [2024-11-14 05:28:58,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510878055] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:28:58,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219426379] [2024-11-14 05:28:58,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:28:58,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:28:58,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:28:58,627 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:28:58,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2024-11-14 05:28:59,479 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-11-14 05:28:59,479 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:28:59,489 INFO L255 TraceCheckSpWp]: Trace formula consists of 738 conjuncts, 159 conjuncts are in the unsatisfiable core [2024-11-14 05:28:59,493 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:28:59,501 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 10 treesize of output 8 [2024-11-14 05:29:00,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 05:29:01,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 05:29:01,291 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 28 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:29:01,291 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:29:01,483 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3000 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_3000) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 13 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2024-11-14 05:29:01,491 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:29:01,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 23 treesize of output 24 [2024-11-14 05:29:01,500 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:29:01,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2024-11-14 05:29:01,859 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 28 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:29:01,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219426379] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:29:01,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2005284403] [2024-11-14 05:29:01,860 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:29:01,860 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:29:01,860 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:29:01,861 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:29:01,861 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:29:02,601 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:29:05,737 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '524892#(and (exists ((|v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_507| Int) (|v_ULTIMATE.start_cstrcspn_#t~post2#1.base_499| Int)) (and (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_507|) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post2#1.base_499|) |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_507|) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|))) (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0))' at error location [2024-11-14 05:29:05,737 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:29:05,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:29:05,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 35, 35] total 60 [2024-11-14 05:29:05,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011304977] [2024-11-14 05:29:05,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:29:05,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-11-14 05:29:05,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:29:05,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-11-14 05:29:05,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=4950, Unknown=1, NotChecked=140, Total=5256 [2024-11-14 05:29:05,738 INFO L87 Difference]: Start difference. First operand 12782 states and 15482 transitions. Second operand has 61 states, 61 states have (on average 2.5901639344262297) internal successors, (158), 60 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:29:11,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:29:11,929 INFO L93 Difference]: Finished difference Result 24018 states and 28943 transitions. [2024-11-14 05:29:11,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-14 05:29:11,929 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.5901639344262297) internal successors, (158), 60 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2024-11-14 05:29:11,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:29:11,939 INFO L225 Difference]: With dead ends: 24018 [2024-11-14 05:29:11,939 INFO L226 Difference]: Without dead ends: 13902 [2024-11-14 05:29:11,940 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=331, Invalid=10384, Unknown=1, NotChecked=204, Total=10920 [2024-11-14 05:29:11,940 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 44 mSDsluCounter, 3614 mSDsCounter, 0 mSdLazyCounter, 5050 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 3685 SdHoareTripleChecker+Invalid, 5229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 5050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2024-11-14 05:29:11,941 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 3685 Invalid, 5229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 5050 Invalid, 0 Unknown, 166 Unchecked, 3.8s Time] [2024-11-14 05:29:11,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13902 states. [2024-11-14 05:29:12,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13902 to 12899. [2024-11-14 05:29:12,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12899 states, 12897 states have (on average 1.2111343723346515) internal successors, (15620), 12898 states have internal predecessors, (15620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:29:12,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12899 states to 12899 states and 15620 transitions. [2024-11-14 05:29:12,065 INFO L78 Accepts]: Start accepts. Automaton has 12899 states and 15620 transitions. Word has length 117 [2024-11-14 05:29:12,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:29:12,065 INFO L471 AbstractCegarLoop]: Abstraction has 12899 states and 15620 transitions. [2024-11-14 05:29:12,065 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.5901639344262297) internal successors, (158), 60 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:29:12,065 INFO L276 IsEmpty]: Start isEmpty. Operand 12899 states and 15620 transitions. [2024-11-14 05:29:12,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-11-14 05:29:12,069 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:29:12,069 INFO L215 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:29:12,088 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2024-11-14 05:29:12,270 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2024-11-14 05:29:12,270 INFO L396 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:29:12,270 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:29:12,270 INFO L85 PathProgramCache]: Analyzing trace with hash 145426913, now seen corresponding path program 34 times [2024-11-14 05:29:12,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:29:12,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946234789] [2024-11-14 05:29:12,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:29:12,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:29:12,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:29:15,125 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 256 proven. 716 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:29:15,125 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:29:15,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946234789] [2024-11-14 05:29:15,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946234789] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:29:15,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618618950] [2024-11-14 05:29:15,126 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:29:15,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:29:15,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:29:15,128 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:29:15,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2024-11-14 05:29:15,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:29:15,498 INFO L255 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 177 conjuncts are in the unsatisfiable core [2024-11-14 05:29:15,501 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:29:17,176 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 289 proven. 683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:29:17,176 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:29:19,377 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 [2024-11-14 05:29:20,624 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 289 proven. 683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:29:20,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618618950] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:29:20,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [688822779] [2024-11-14 05:29:20,625 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:29:20,625 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:29:20,625 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:29:20,625 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:29:20,625 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:29:21,112 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:29:24,305 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '562669#(and (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_1449| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_1438| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_1438|) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_1438|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_1449|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_1449|) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))))' at error location [2024-11-14 05:29:24,305 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:29:24,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:29:24,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 87 [2024-11-14 05:29:24,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337707544] [2024-11-14 05:29:24,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:29:24,306 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2024-11-14 05:29:24,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:29:24,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2024-11-14 05:29:24,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=907, Invalid=8992, Unknown=1, NotChecked=0, Total=9900 [2024-11-14 05:29:24,307 INFO L87 Difference]: Start difference. First operand 12899 states and 15620 transitions. Second operand has 88 states, 87 states have (on average 2.7471264367816093) internal successors, (239), 88 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:29:30,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:29:30,724 INFO L93 Difference]: Finished difference Result 14002 states and 16749 transitions. [2024-11-14 05:29:30,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-11-14 05:29:30,725 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 87 states have (on average 2.7471264367816093) internal successors, (239), 88 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2024-11-14 05:29:30,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:29:30,733 INFO L225 Difference]: With dead ends: 14002 [2024-11-14 05:29:30,733 INFO L226 Difference]: Without dead ends: 14002 [2024-11-14 05:29:30,734 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 274 SyntacticMatches, 19 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7486 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=1579, Invalid=17602, Unknown=1, NotChecked=0, Total=19182 [2024-11-14 05:29:30,734 INFO L432 NwaCegarLoop]: 80 mSDtfsCounter, 694 mSDsluCounter, 2666 mSDsCounter, 0 mSdLazyCounter, 4736 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 694 SdHoareTripleChecker+Valid, 2746 SdHoareTripleChecker+Invalid, 4736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2024-11-14 05:29:30,734 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [694 Valid, 2746 Invalid, 4736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4736 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2024-11-14 05:29:30,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14002 states. [2024-11-14 05:29:30,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14002 to 13011. [2024-11-14 05:29:30,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13011 states, 13009 states have (on average 1.211392113152433) internal successors, (15759), 13010 states have internal predecessors, (15759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:29:30,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13011 states to 13011 states and 15759 transitions. [2024-11-14 05:29:30,863 INFO L78 Accepts]: Start accepts. Automaton has 13011 states and 15759 transitions. Word has length 117 [2024-11-14 05:29:30,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:29:30,863 INFO L471 AbstractCegarLoop]: Abstraction has 13011 states and 15759 transitions. [2024-11-14 05:29:30,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 87 states have (on average 2.7471264367816093) internal successors, (239), 88 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:29:30,863 INFO L276 IsEmpty]: Start isEmpty. Operand 13011 states and 15759 transitions. [2024-11-14 05:29:30,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2024-11-14 05:29:30,867 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:29:30,867 INFO L215 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2024-11-14 05:29:30,889 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2024-11-14 05:29:31,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:29:31,068 INFO L396 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:29:31,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:29:31,068 INFO L85 PathProgramCache]: Analyzing trace with hash 261667055, now seen corresponding path program 27 times [2024-11-14 05:29:31,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:29:31,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140608357] [2024-11-14 05:29:31,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:29:31,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:29:31,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:29:32,783 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 169 proven. 601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:29:32,783 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:29:32,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140608357] [2024-11-14 05:29:32,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140608357] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:29:32,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992391132] [2024-11-14 05:29:32,783 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:29:32,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:29:32,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:29:32,786 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:29:32,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2024-11-14 05:29:33,666 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:29:33,666 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:29:33,673 INFO L255 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 142 conjuncts are in the unsatisfiable core [2024-11-14 05:29:33,676 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:29:35,072 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 169 proven. 601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:29:35,072 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:29:36,554 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 21 treesize of output 17 [2024-11-14 05:29:37,794 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 169 proven. 601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:29:37,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992391132] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:29:37,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1878197646] [2024-11-14 05:29:37,795 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:29:37,795 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:29:37,795 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:29:37,795 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:29:37,795 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:29:38,601 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:29:41,454 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '590564#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post2#1.base_523| Int) (|v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_531| Int)) (and (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post2#1.base_523|) |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_531|) (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_531|) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|)))' at error location [2024-11-14 05:29:41,454 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:29:41,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:29:41,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 82 [2024-11-14 05:29:41,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470635250] [2024-11-14 05:29:41,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:29:41,455 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2024-11-14 05:29:41,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:29:41,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2024-11-14 05:29:41,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=950, Invalid=8170, Unknown=0, NotChecked=0, Total=9120 [2024-11-14 05:29:41,457 INFO L87 Difference]: Start difference. First operand 13011 states and 15759 transitions. Second operand has 84 states, 83 states have (on average 3.289156626506024) internal successors, (273), 83 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:29:44,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:29:44,997 INFO L93 Difference]: Finished difference Result 13825 states and 16732 transitions. [2024-11-14 05:29:44,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-14 05:29:44,998 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 83 states have (on average 3.289156626506024) internal successors, (273), 83 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2024-11-14 05:29:44,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:29:45,008 INFO L225 Difference]: With dead ends: 13825 [2024-11-14 05:29:45,008 INFO L226 Difference]: Without dead ends: 13825 [2024-11-14 05:29:45,009 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4099 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=1140, Invalid=10850, Unknown=0, NotChecked=0, Total=11990 [2024-11-14 05:29:45,009 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 101 mSDsluCounter, 1789 mSDsCounter, 0 mSdLazyCounter, 3310 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 1849 SdHoareTripleChecker+Invalid, 3310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:29:45,009 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 1849 Invalid, 3310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3310 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-14 05:29:45,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13825 states. [2024-11-14 05:29:45,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13825 to 13811. [2024-11-14 05:29:45,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13811 states, 13809 states have (on average 1.2116735462379606) internal successors, (16732), 13810 states have internal predecessors, (16732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:29:45,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13811 states to 13811 states and 16732 transitions. [2024-11-14 05:29:45,196 INFO L78 Accepts]: Start accepts. Automaton has 13811 states and 16732 transitions. Word has length 119 [2024-11-14 05:29:45,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:29:45,196 INFO L471 AbstractCegarLoop]: Abstraction has 13811 states and 16732 transitions. [2024-11-14 05:29:45,197 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 83 states have (on average 3.289156626506024) internal successors, (273), 83 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:29:45,197 INFO L276 IsEmpty]: Start isEmpty. Operand 13811 states and 16732 transitions. [2024-11-14 05:29:45,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-11-14 05:29:45,204 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:29:45,204 INFO L215 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:29:45,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2024-11-14 05:29:45,404 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:29:45,404 INFO L396 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:29:45,405 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:29:45,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1209870182, now seen corresponding path program 35 times [2024-11-14 05:29:45,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:29:45,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505194852] [2024-11-14 05:29:45,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:29:45,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:29:45,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:29:47,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 38 proven. 1008 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:29:47,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:29:47,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505194852] [2024-11-14 05:29:47,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505194852] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:29:47,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650467489] [2024-11-14 05:29:47,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:29:47,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:29:47,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:29:47,899 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:29:47,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2024-11-14 05:29:49,967 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2024-11-14 05:29:49,967 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:29:49,974 INFO L255 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 200 conjuncts are in the unsatisfiable core [2024-11-14 05:29:49,979 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:29:51,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 9 [2024-11-14 05:29:51,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 38 proven. 1008 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:29:51,700 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:29:51,877 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 15 treesize of output 13 [2024-11-14 05:29:51,880 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 16 treesize of output 12 [2024-11-14 05:29:52,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 38 proven. 1008 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:29:52,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650467489] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:29:52,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [327368710] [2024-11-14 05:29:52,120 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:29:52,120 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:29:52,120 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:29:52,120 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:29:52,120 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:29:52,622 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:29:56,073 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '619032#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_1517| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_1528| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_1528|) (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_1517|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_1528|) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_1517|) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|)))' at error location [2024-11-14 05:29:56,074 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:29:56,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:29:56,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 72 [2024-11-14 05:29:56,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12549099] [2024-11-14 05:29:56,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:29:56,074 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2024-11-14 05:29:56,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:29:56,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2024-11-14 05:29:56,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=6735, Unknown=1, NotChecked=0, Total=6972 [2024-11-14 05:29:56,075 INFO L87 Difference]: Start difference. First operand 13811 states and 16732 transitions. Second operand has 72 states, 72 states have (on average 2.3472222222222223) internal successors, (169), 72 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:30:04,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:30:04,398 INFO L93 Difference]: Finished difference Result 17177 states and 20616 transitions. [2024-11-14 05:30:04,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-11-14 05:30:04,398 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.3472222222222223) internal successors, (169), 72 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2024-11-14 05:30:04,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:30:04,409 INFO L225 Difference]: With dead ends: 17177 [2024-11-14 05:30:04,409 INFO L226 Difference]: Without dead ends: 15589 [2024-11-14 05:30:04,410 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3515 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=487, Invalid=15012, Unknown=1, NotChecked=0, Total=15500 [2024-11-14 05:30:04,410 INFO L432 NwaCegarLoop]: 101 mSDtfsCounter, 298 mSDsluCounter, 5105 mSDsCounter, 0 mSdLazyCounter, 6660 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 5206 SdHoareTripleChecker+Invalid, 6678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 6660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:30:04,410 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 5206 Invalid, 6678 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [18 Valid, 6660 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2024-11-14 05:30:04,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15589 states. [2024-11-14 05:30:04,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15589 to 15015. [2024-11-14 05:30:04,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15015 states, 15013 states have (on average 1.2128155598481316) internal successors, (18208), 15014 states have internal predecessors, (18208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:30:04,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15015 states to 15015 states and 18208 transitions. [2024-11-14 05:30:04,538 INFO L78 Accepts]: Start accepts. Automaton has 15015 states and 18208 transitions. Word has length 121 [2024-11-14 05:30:04,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:30:04,539 INFO L471 AbstractCegarLoop]: Abstraction has 15015 states and 18208 transitions. [2024-11-14 05:30:04,539 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.3472222222222223) internal successors, (169), 72 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:30:04,539 INFO L276 IsEmpty]: Start isEmpty. Operand 15015 states and 18208 transitions. [2024-11-14 05:30:04,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-14 05:30:04,543 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:30:04,544 INFO L215 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:30:04,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2024-11-14 05:30:04,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2024-11-14 05:30:04,744 INFO L396 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 05:30:04,744 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:30:04,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1854473076, now seen corresponding path program 36 times [2024-11-14 05:30:04,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:30:04,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600500073] [2024-11-14 05:30:04,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:30:04,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:30:04,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:30:08,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 289 proven. 794 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:30:08,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:30:08,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600500073] [2024-11-14 05:30:08,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600500073] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:30:08,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304663059] [2024-11-14 05:30:08,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:30:08,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:30:08,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:30:08,135 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:30:08,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_723cfb8d-09c8-4b54-a2a7-387304e98357/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2024-11-14 05:30:09,278 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:30:09,278 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:30:09,285 INFO L255 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 189 conjuncts are in the unsatisfiable core [2024-11-14 05:30:09,288 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:30:11,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 324 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:30:11,413 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:30:13,833 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 21 treesize of output 17 [2024-11-14 05:30:16,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 324 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:30:16,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304663059] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:30:16,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1131765604] [2024-11-14 05:30:16,107 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:30:16,107 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:30:16,107 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:30:16,107 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:30:16,107 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:30:16,582 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:30:20,129 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '652162#(and (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_1573| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_1562| Int)) (and (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_1562|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_1573|) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_1562|) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_1573|) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))) (= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0))' at error location [2024-11-14 05:30:20,129 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:30:20,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:30:20,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 110 [2024-11-14 05:30:20,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505202640] [2024-11-14 05:30:20,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:30:20,130 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2024-11-14 05:30:20,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:30:20,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2024-11-14 05:30:20,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=13538, Unknown=1, NotChecked=0, Total=15252 [2024-11-14 05:30:20,132 INFO L87 Difference]: Start difference. First operand 15015 states and 18208 transitions. Second operand has 112 states, 111 states have (on average 2.6396396396396398) internal successors, (293), 111 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)