./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 a0165632 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/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_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje --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 0.2.5-dev-a016563 [2024-11-09 06:05:12,977 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 06:05:13,081 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-09 06:05:13,092 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 06:05:13,093 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 06:05:13,146 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 06:05:13,147 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 06:05:13,147 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 06:05:13,148 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 06:05:13,149 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 06:05:13,150 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 06:05:13,151 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 06:05:13,152 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 06:05:13,154 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 06:05:13,155 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 06:05:13,156 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 06:05:13,156 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 06:05:13,156 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 06:05:13,157 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 06:05:13,157 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 06:05:13,158 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 06:05:13,162 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 06:05:13,163 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 06:05:13,163 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 06:05:13,164 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 06:05:13,164 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 06:05:13,165 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 06:05:13,165 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 06:05:13,165 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 06:05:13,166 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 06:05:13,166 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 06:05:13,166 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 06:05:13,167 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 06:05:13,167 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 06:05:13,167 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 06:05:13,168 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 06:05:13,170 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 06:05:13,170 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 06:05:13,171 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 06:05:13,171 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 06:05:13,171 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 06:05:13,172 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 06:05:13,172 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 06:05:13,172 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 06:05:13,173 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 06:05:13,173 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 06:05:13,173 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 06:05:13,173 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 06:05:13,174 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 06:05:13,174 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 86c4ccee9690ccdd33683565314ba095e56520aa142914bd8063fc7c4c92940d [2024-11-09 06:05:13,488 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 06:05:13,521 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 06:05:13,525 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 06:05:13,526 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 06:05:13,527 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 06:05:13,529 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/array-memsafety/openbsd_cstrcspn-alloca-2.i Unable to find full path for "g++" [2024-11-09 06:05:15,685 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 06:05:16,026 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 06:05:16,027 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/sv-benchmarks/c/array-memsafety/openbsd_cstrcspn-alloca-2.i [2024-11-09 06:05:16,044 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/data/718a95301/e0fbe402ab424606a7b47c644873e214/FLAG225867c4e [2024-11-09 06:05:16,064 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/data/718a95301/e0fbe402ab424606a7b47c644873e214 [2024-11-09 06:05:16,071 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 06:05:16,073 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 06:05:16,074 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 06:05:16,078 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 06:05:16,085 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 06:05:16,086 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:05:16" (1/1) ... [2024-11-09 06:05:16,087 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5725fb1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:05:16, skipping insertion in model container [2024-11-09 06:05:16,087 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:05:16" (1/1) ... [2024-11-09 06:05:16,150 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 06:05:16,616 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-09 06:05:16,618 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-09 06:05:16,625 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 06:05:16,650 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 06:05:16,728 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 06:05:16,773 INFO L204 MainTranslator]: Completed translation [2024-11-09 06:05:16,774 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:05:16 WrapperNode [2024-11-09 06:05:16,774 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 06:05:16,776 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 06:05:16,776 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 06:05:16,776 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 06:05:16,785 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:05:16" (1/1) ... [2024-11-09 06:05:16,802 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:05:16" (1/1) ... [2024-11-09 06:05:16,830 INFO L138 Inliner]: procedures = 117, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 90 [2024-11-09 06:05:16,830 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 06:05:16,831 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 06:05:16,832 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 06:05:16,832 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 06:05:16,842 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:05:16" (1/1) ... [2024-11-09 06:05:16,843 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:05:16" (1/1) ... [2024-11-09 06:05:16,846 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:05:16" (1/1) ... [2024-11-09 06:05:16,847 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:05:16" (1/1) ... [2024-11-09 06:05:16,855 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:05:16" (1/1) ... [2024-11-09 06:05:16,863 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:05:16" (1/1) ... [2024-11-09 06:05:16,867 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:05:16" (1/1) ... [2024-11-09 06:05:16,870 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:05:16" (1/1) ... [2024-11-09 06:05:16,876 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 06:05:16,878 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 06:05:16,879 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 06:05:16,882 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 06:05:16,883 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:05:16" (1/1) ... [2024-11-09 06:05:16,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 06:05:16,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:05:16,925 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 06:05:16,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 06:05:16,969 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 06:05:16,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 06:05:16,972 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 06:05:16,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 06:05:16,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 06:05:16,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 06:05:17,115 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 06:05:17,117 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 06:05:17,408 INFO L? ?]: Removed 57 outVars from TransFormulas that were not future-live. [2024-11-09 06:05:17,409 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 06:05:17,500 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 06:05:17,500 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-09 06:05:17,501 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:05:17 BoogieIcfgContainer [2024-11-09 06:05:17,501 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 06:05:17,504 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 06:05:17,504 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 06:05:17,508 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 06:05:17,509 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 06:05:16" (1/3) ... [2024-11-09 06:05:17,510 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a4053c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:05:17, skipping insertion in model container [2024-11-09 06:05:17,510 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:05:16" (2/3) ... [2024-11-09 06:05:17,510 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a4053c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:05:17, skipping insertion in model container [2024-11-09 06:05:17,511 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:05:17" (3/3) ... [2024-11-09 06:05:17,512 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcspn-alloca-2.i [2024-11-09 06:05:17,533 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 06:05:17,533 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2024-11-09 06:05:17,583 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 06:05:17,592 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;@5ab21160, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 06:05:17,592 INFO L334 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2024-11-09 06:05:17,598 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 32 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:05:17,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-09 06:05:17,606 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:05:17,606 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-09 06:05:17,607 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)] === [2024-11-09 06:05:17,614 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:05:17,614 INFO L85 PathProgramCache]: Analyzing trace with hash 4219560, now seen corresponding path program 1 times [2024-11-09 06:05:17,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:05:17,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628871795] [2024-11-09 06:05:17,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:05:17,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:05:17,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:05:18,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:05:18,172 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:05:18,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628871795] [2024-11-09 06:05:18,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628871795] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:05:18,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:05:18,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 06:05:18,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385603277] [2024-11-09 06:05:18,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:05:18,186 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:05:18,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:05:18,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:05:18,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:05:18,235 INFO L87 Difference]: Start difference. First operand has 33 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 32 states have internal predecessors, (40), 0 states have call successors, (0), 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 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) [2024-11-09 06:05:18,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:05:18,321 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2024-11-09 06:05:18,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:05:18,326 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 [2024-11-09 06:05:18,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:05:18,334 INFO L225 Difference]: With dead ends: 31 [2024-11-09 06:05:18,334 INFO L226 Difference]: Without dead ends: 30 [2024-11-09 06:05:18,336 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 [2024-11-09 06:05:18,340 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 15 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:05:18,342 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 32 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:05:18,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-09 06:05:18,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-11-09 06:05:18,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.8421052631578947) 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) [2024-11-09 06:05:18,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2024-11-09 06:05:18,379 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 4 [2024-11-09 06:05:18,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:05:18,380 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2024-11-09 06:05:18,380 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) [2024-11-09 06:05:18,381 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2024-11-09 06:05:18,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-09 06:05:18,381 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:05:18,381 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-09 06:05:18,382 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 06:05:18,382 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)] === [2024-11-09 06:05:18,383 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:05:18,383 INFO L85 PathProgramCache]: Analyzing trace with hash 4219561, now seen corresponding path program 1 times [2024-11-09 06:05:18,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:05:18,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901220782] [2024-11-09 06:05:18,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:05:18,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:05:18,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:05:18,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:05:18,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:05:18,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901220782] [2024-11-09 06:05:18,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901220782] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:05:18,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:05:18,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:05:18,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392632147] [2024-11-09 06:05:18,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:05:18,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 06:05:18,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:05:18,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 06:05:18,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:05:18,961 INFO L87 Difference]: Start difference. First operand 30 states and 35 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) [2024-11-09 06:05:19,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:05:19,069 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2024-11-09 06:05:19,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 06:05:19,072 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 [2024-11-09 06:05:19,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:05:19,073 INFO L225 Difference]: With dead ends: 33 [2024-11-09 06:05:19,073 INFO L226 Difference]: Without dead ends: 33 [2024-11-09 06:05:19,074 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:05:19,076 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 2 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 60 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 [2024-11-09 06:05:19,077 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 60 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:05:19,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-09 06:05:19,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-11-09 06:05:19,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:05:19,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2024-11-09 06:05:19,087 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 4 [2024-11-09 06:05:19,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:05:19,088 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2024-11-09 06:05:19,088 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) [2024-11-09 06:05:19,088 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2024-11-09 06:05:19,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-09 06:05:19,090 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:05:19,090 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 06:05:19,091 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 06:05:19,091 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 06:05:19,092 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:05:19,092 INFO L85 PathProgramCache]: Analyzing trace with hash -229562153, now seen corresponding path program 1 times [2024-11-09 06:05:19,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:05:19,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378490436] [2024-11-09 06:05:19,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:05:19,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:05:19,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:05:19,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:05:19,193 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:05:19,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378490436] [2024-11-09 06:05:19,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378490436] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:05:19,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:05:19,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 06:05:19,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937352653] [2024-11-09 06:05:19,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:05:19,195 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:05:19,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:05:19,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:05:19,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:05:19,196 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:05:19,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:05:19,251 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2024-11-09 06:05:19,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:05:19,252 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 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 [2024-11-09 06:05:19,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:05:19,254 INFO L225 Difference]: With dead ends: 31 [2024-11-09 06:05:19,255 INFO L226 Difference]: Without dead ends: 31 [2024-11-09 06:05:19,255 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 [2024-11-09 06:05:19,260 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 11 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 32 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 [2024-11-09 06:05:19,261 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 32 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 06:05:19,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-09 06:05:19,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-11-09 06:05:19,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 30 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) [2024-11-09 06:05:19,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2024-11-09 06:05:19,267 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 6 [2024-11-09 06:05:19,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:05:19,268 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2024-11-09 06:05:19,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:05:19,268 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2024-11-09 06:05:19,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-09 06:05:19,269 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:05:19,269 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 06:05:19,269 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 06:05:19,270 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 06:05:19,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:05:19,274 INFO L85 PathProgramCache]: Analyzing trace with hash -229562152, now seen corresponding path program 1 times [2024-11-09 06:05:19,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:05:19,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251447930] [2024-11-09 06:05:19,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:05:19,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:05:19,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:05:19,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:05:19,677 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:05:19,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251447930] [2024-11-09 06:05:19,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251447930] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:05:19,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:05:19,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 06:05:19,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454293603] [2024-11-09 06:05:19,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:05:19,680 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 06:05:19,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:05:19,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 06:05:19,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:05:19,682 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:05:19,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:05:19,809 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2024-11-09 06:05:19,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 06:05:19,810 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 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 [2024-11-09 06:05:19,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:05:19,810 INFO L225 Difference]: With dead ends: 34 [2024-11-09 06:05:19,811 INFO L226 Difference]: Without dead ends: 34 [2024-11-09 06:05:19,811 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:05:19,813 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 16 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:05:19,815 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 60 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:05:19,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-09 06:05:19,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-11-09 06:05:19,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 25 states have (on average 1.64) internal successors, (41), 33 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) [2024-11-09 06:05:19,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2024-11-09 06:05:19,825 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 6 [2024-11-09 06:05:19,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:05:19,825 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2024-11-09 06:05:19,826 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:05:19,826 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2024-11-09 06:05:19,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-09 06:05:19,826 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:05:19,826 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 06:05:19,827 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 06:05:19,827 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 06:05:19,827 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:05:19,828 INFO L85 PathProgramCache]: Analyzing trace with hash -229551325, now seen corresponding path program 1 times [2024-11-09 06:05:19,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:05:19,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864139670] [2024-11-09 06:05:19,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:05:19,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:05:19,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:05:20,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:05:20,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:05:20,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864139670] [2024-11-09 06:05:20,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864139670] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:05:20,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:05:20,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 06:05:20,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846921667] [2024-11-09 06:05:20,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:05:20,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 06:05:20,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:05:20,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 06:05:20,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 06:05:20,109 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:05:20,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:05:20,161 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2024-11-09 06:05:20,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:05:20,162 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 [2024-11-09 06:05:20,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:05:20,163 INFO L225 Difference]: With dead ends: 33 [2024-11-09 06:05:20,163 INFO L226 Difference]: Without dead ends: 33 [2024-11-09 06:05:20,163 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 06:05:20,165 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 18 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:05:20,165 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 29 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 06:05:20,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-09 06:05:20,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-11-09 06:05:20,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.6) internal successors, (40), 32 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:05:20,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2024-11-09 06:05:20,173 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 6 [2024-11-09 06:05:20,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:05:20,174 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2024-11-09 06:05:20,174 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:05:20,174 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2024-11-09 06:05:20,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 06:05:20,175 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:05:20,175 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2024-11-09 06:05:20,175 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 06:05:20,176 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 06:05:20,176 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:05:20,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1153113731, now seen corresponding path program 1 times [2024-11-09 06:05:20,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:05:20,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069913905] [2024-11-09 06:05:20,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:05:20,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:05:20,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:05:20,550 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:05:20,550 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:05:20,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069913905] [2024-11-09 06:05:20,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069913905] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:05:20,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749630303] [2024-11-09 06:05:20,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:05:20,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:05:20,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:05:20,554 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:05:20,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 06:05:20,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:05:20,651 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 06:05:20,668 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:05:20,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 06:05:20,800 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 7 [2024-11-09 06:05:20,815 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 [2024-11-09 06:05:21,078 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:05:21,078 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:05:21,293 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:05:21,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749630303] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:05:21,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1197095388] [2024-11-09 06:05:21,316 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2024-11-09 06:05:21,316 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:05:21,322 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:05:21,328 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:05:21,329 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:05:22,490 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:05:22,898 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '428#(exists ((|v_ULTIMATE.start_main_~i~0#1_35| Int) (|v_ULTIMATE.start_main_~nondetString1~0#1.offset_27| Int) (|v_ULTIMATE.start_main_~nondetString1~0#1.base_29| Int)) (and (<= 2 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 1 |#StackHeapBarrier|) (= |v_ULTIMATE.start_main_~nondetString1~0#1.offset_27| 0) (<= |ULTIMATE.start_main_#t~nondet10#1| 127) (= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |v_ULTIMATE.start_main_~i~0#1_35|) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= (select |#length| |v_ULTIMATE.start_main_~nondetString1~0#1.base_29|) |v_ULTIMATE.start_main_~i~0#1_35|) (<= 2 |v_ULTIMATE.start_main_~nondetString1~0#1.base_29|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet10#1|)) (<= 2 |ULTIMATE.start_main_~length1~0#1|)))' at error location [2024-11-09 06:05:22,899 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:05:22,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:05:22,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2024-11-09 06:05:22,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137451901] [2024-11-09 06:05:22,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:05:22,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 06:05:22,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:05:22,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 06:05:22,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2024-11-09 06:05:22,901 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:05:23,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:05:23,141 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2024-11-09 06:05:23,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 06:05:23,142 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 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 [2024-11-09 06:05:23,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:05:23,143 INFO L225 Difference]: With dead ends: 33 [2024-11-09 06:05:23,143 INFO L226 Difference]: Without dead ends: 33 [2024-11-09 06:05:23,143 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2024-11-09 06:05:23,144 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 3 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:05:23,145 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 66 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:05:23,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-09 06:05:23,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2024-11-09 06:05:23,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.5454545454545454) 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) [2024-11-09 06:05:23,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2024-11-09 06:05:23,149 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 7 [2024-11-09 06:05:23,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:05:23,149 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2024-11-09 06:05:23,149 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:05:23,149 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2024-11-09 06:05:23,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 06:05:23,150 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:05:23,150 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:05:23,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 06:05:23,354 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-09 06:05:23,355 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 06:05:23,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:05:23,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1473843510, now seen corresponding path program 1 times [2024-11-09 06:05:23,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:05:23,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404692094] [2024-11-09 06:05:23,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:05:23,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:05:23,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:05:23,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:05:23,602 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:05:23,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404692094] [2024-11-09 06:05:23,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404692094] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:05:23,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:05:23,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:05:23,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137582753] [2024-11-09 06:05:23,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:05:23,603 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 06:05:23,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:05:23,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 06:05:23,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:05:23,605 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 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) [2024-11-09 06:05:23,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:05:23,654 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2024-11-09 06:05:23,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:05:23,656 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 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 [2024-11-09 06:05:23,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:05:23,657 INFO L225 Difference]: With dead ends: 28 [2024-11-09 06:05:23,657 INFO L226 Difference]: Without dead ends: 28 [2024-11-09 06:05:23,657 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 [2024-11-09 06:05:23,658 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 17 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:05:23,661 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 37 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 06:05:23,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-09 06:05:23,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-09 06:05:23,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.5) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:05:23,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2024-11-09 06:05:23,667 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 7 [2024-11-09 06:05:23,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:05:23,668 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2024-11-09 06:05:23,668 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 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) [2024-11-09 06:05:23,668 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2024-11-09 06:05:23,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-09 06:05:23,668 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:05:23,669 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-11-09 06:05:23,669 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 06:05:23,669 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 06:05:23,669 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:05:23,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1296341420, now seen corresponding path program 1 times [2024-11-09 06:05:23,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:05:23,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615080509] [2024-11-09 06:05:23,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:05:23,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:05:23,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:05:24,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:05:24,000 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:05:24,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615080509] [2024-11-09 06:05:24,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615080509] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:05:24,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987581317] [2024-11-09 06:05:24,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:05:24,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:05:24,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:05:24,003 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:05:24,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 06:05:24,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:05:24,084 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 06:05:24,086 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:05:24,119 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 [2024-11-09 06:05:24,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 06:05:24,135 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 [2024-11-09 06:05:24,361 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:05:24,361 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:05:24,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:05:24,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987581317] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:05:24,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [574266355] [2024-11-09 06:05:24,645 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-09 06:05:24,646 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:05:24,646 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:05:24,647 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:05:24,647 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:05:25,333 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:05:26,216 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '624#(and (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet12#1|)) (exists ((|v_ULTIMATE.start_main_~nondetString2~0#1.offset_27| Int) (|v_ULTIMATE.start_main_~nondetString2~0#1.base_29| Int) (|v_ULTIMATE.start_main_~i~1#1_31| Int)) (and (<= 1 |#StackHeapBarrier|) (<= (+ |v_ULTIMATE.start_main_~i~1#1_31| 2) |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= (select |#length| |v_ULTIMATE.start_main_~nondetString2~0#1.base_29|) |v_ULTIMATE.start_main_~i~1#1_31|) (<= 2 |v_ULTIMATE.start_main_~nondetString2~0#1.base_29|) (= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |v_ULTIMATE.start_main_~i~1#1_31|) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |v_ULTIMATE.start_main_~nondetString2~0#1.offset_27| 0) (<= 2 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647))) (<= |ULTIMATE.start_main_#t~nondet12#1| 127))' at error location [2024-11-09 06:05:26,216 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:05:26,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:05:26,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2024-11-09 06:05:26,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438073580] [2024-11-09 06:05:26,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:05:26,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 06:05:26,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:05:26,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 06:05:26,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2024-11-09 06:05:26,225 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 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) [2024-11-09 06:05:26,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:05:26,464 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2024-11-09 06:05:26,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 06:05:26,465 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 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) Word has length 9 [2024-11-09 06:05:26,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:05:26,465 INFO L225 Difference]: With dead ends: 28 [2024-11-09 06:05:26,465 INFO L226 Difference]: Without dead ends: 28 [2024-11-09 06:05:26,466 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2024-11-09 06:05:26,466 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 18 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:05:26,467 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 79 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:05:26,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-09 06:05:26,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2024-11-09 06:05:26,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.4210526315789473) 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) [2024-11-09 06:05:26,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2024-11-09 06:05:26,476 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 9 [2024-11-09 06:05:26,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:05:26,476 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2024-11-09 06:05:26,477 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 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) [2024-11-09 06:05:26,477 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2024-11-09 06:05:26,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-09 06:05:26,477 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:05:26,477 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:05:26,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 06:05:26,683 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:05:26,684 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 06:05:26,684 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:05:26,684 INFO L85 PathProgramCache]: Analyzing trace with hash -975547353, now seen corresponding path program 1 times [2024-11-09 06:05:26,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:05:26,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260886264] [2024-11-09 06:05:26,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:05:26,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:05:26,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:05:26,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:05:26,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:05:26,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260886264] [2024-11-09 06:05:26,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260886264] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:05:26,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:05:26,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 06:05:26,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353803337] [2024-11-09 06:05:26,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:05:26,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 06:05:26,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:05:26,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 06:05:26,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:05:26,758 INFO L87 Difference]: Start difference. First operand 24 states and 27 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) [2024-11-09 06:05:26,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:05:26,823 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2024-11-09 06:05:26,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 06:05:26,823 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 [2024-11-09 06:05:26,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:05:26,824 INFO L225 Difference]: With dead ends: 23 [2024-11-09 06:05:26,824 INFO L226 Difference]: Without dead ends: 23 [2024-11-09 06:05:26,824 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 [2024-11-09 06:05:26,825 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 20 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:05:26,826 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 43 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:05:26,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-11-09 06:05:26,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-11-09 06:05:26,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.368421052631579) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:05:26,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2024-11-09 06:05:26,829 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 9 [2024-11-09 06:05:26,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:05:26,829 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2024-11-09 06:05:26,830 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) [2024-11-09 06:05:26,830 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2024-11-09 06:05:26,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-09 06:05:26,830 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:05:26,830 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:05:26,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-09 06:05:26,831 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 06:05:26,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:05:26,832 INFO L85 PathProgramCache]: Analyzing trace with hash -975547352, now seen corresponding path program 1 times [2024-11-09 06:05:26,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:05:26,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375269774] [2024-11-09 06:05:26,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:05:26,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:05:26,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:05:27,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:05:27,001 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:05:27,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375269774] [2024-11-09 06:05:27,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375269774] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:05:27,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:05:27,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 06:05:27,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361423982] [2024-11-09 06:05:27,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:05:27,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 06:05:27,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:05:27,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 06:05:27,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:05:27,003 INFO L87 Difference]: Start difference. First operand 23 states and 26 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) [2024-11-09 06:05:27,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:05:27,056 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2024-11-09 06:05:27,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 06:05:27,057 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 [2024-11-09 06:05:27,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:05:27,058 INFO L225 Difference]: With dead ends: 25 [2024-11-09 06:05:27,058 INFO L226 Difference]: Without dead ends: 25 [2024-11-09 06:05:27,058 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 [2024-11-09 06:05:27,059 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 10 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:05:27,060 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 65 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 06:05:27,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-09 06:05:27,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-11-09 06:05:27,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.3333333333333333) 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) [2024-11-09 06:05:27,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2024-11-09 06:05:27,063 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 9 [2024-11-09 06:05:27,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:05:27,063 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2024-11-09 06:05:27,063 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) [2024-11-09 06:05:27,064 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2024-11-09 06:05:27,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-09 06:05:27,064 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:05:27,064 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:05:27,065 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-09 06:05:27,065 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 06:05:27,065 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:05:27,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1198102647, now seen corresponding path program 1 times [2024-11-09 06:05:27,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:05:27,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536504655] [2024-11-09 06:05:27,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:05:27,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:05:27,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:05:27,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:05:27,140 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:05:27,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536504655] [2024-11-09 06:05:27,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536504655] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:05:27,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:05:27,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 06:05:27,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327926760] [2024-11-09 06:05:27,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:05:27,142 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 06:05:27,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:05:27,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 06:05:27,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:05:27,143 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:05:27,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:05:27,200 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2024-11-09 06:05:27,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 06:05:27,201 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2024-11-09 06:05:27,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:05:27,201 INFO L225 Difference]: With dead ends: 24 [2024-11-09 06:05:27,201 INFO L226 Difference]: Without dead ends: 24 [2024-11-09 06:05:27,202 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 [2024-11-09 06:05:27,202 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 17 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:05:27,203 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 47 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 06:05:27,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-09 06:05:27,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-09 06:05:27,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 21 states have (on average 1.2857142857142858) 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) [2024-11-09 06:05:27,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2024-11-09 06:05:27,206 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 11 [2024-11-09 06:05:27,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:05:27,206 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2024-11-09 06:05:27,206 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:05:27,206 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2024-11-09 06:05:27,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-09 06:05:27,207 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:05:27,207 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:05:27,207 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-09 06:05:27,208 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 06:05:27,208 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:05:27,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1198102646, now seen corresponding path program 1 times [2024-11-09 06:05:27,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:05:27,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901844492] [2024-11-09 06:05:27,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:05:27,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:05:27,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:05:27,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:05:27,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:05:27,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901844492] [2024-11-09 06:05:27,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901844492] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:05:27,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:05:27,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 06:05:27,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14739420] [2024-11-09 06:05:27,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:05:27,367 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 06:05:27,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:05:27,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 06:05:27,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:05:27,368 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:05:27,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:05:27,453 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2024-11-09 06:05:27,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 06:05:27,454 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2024-11-09 06:05:27,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:05:27,458 INFO L225 Difference]: With dead ends: 26 [2024-11-09 06:05:27,458 INFO L226 Difference]: Without dead ends: 26 [2024-11-09 06:05:27,459 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 [2024-11-09 06:05:27,459 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:05:27,460 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 58 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:05:27,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-09 06:05:27,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-11-09 06:05:27,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 23 states have (on average 1.2608695652173914) 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) [2024-11-09 06:05:27,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2024-11-09 06:05:27,462 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 11 [2024-11-09 06:05:27,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:05:27,463 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2024-11-09 06:05:27,463 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:05:27,463 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2024-11-09 06:05:27,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-09 06:05:27,464 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:05:27,464 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:05:27,464 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-09 06:05:27,465 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 06:05:27,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:05:27,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1496754390, now seen corresponding path program 1 times [2024-11-09 06:05:27,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:05:27,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99702455] [2024-11-09 06:05:27,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:05:27,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:05:27,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:05:27,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:05:27,642 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:05:27,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99702455] [2024-11-09 06:05:27,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99702455] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:05:27,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:05:27,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 06:05:27,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449123205] [2024-11-09 06:05:27,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:05:27,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 06:05:27,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:05:27,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 06:05:27,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 06:05:27,644 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:05:27,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:05:27,672 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2024-11-09 06:05:27,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 06:05:27,673 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2024-11-09 06:05:27,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:05:27,673 INFO L225 Difference]: With dead ends: 25 [2024-11-09 06:05:27,673 INFO L226 Difference]: Without dead ends: 23 [2024-11-09 06:05:27,674 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 [2024-11-09 06:05:27,674 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 11 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:05:27,675 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 32 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 06:05:27,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-11-09 06:05:27,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-11-09 06:05:27,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:05:27,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2024-11-09 06:05:27,678 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2024-11-09 06:05:27,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:05:27,678 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2024-11-09 06:05:27,678 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:05:27,678 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2024-11-09 06:05:27,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-09 06:05:27,679 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:05:27,679 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:05:27,679 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-09 06:05:27,680 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)] === [2024-11-09 06:05:27,680 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:05:27,680 INFO L85 PathProgramCache]: Analyzing trace with hash 845304205, now seen corresponding path program 1 times [2024-11-09 06:05:27,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:05:27,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328872608] [2024-11-09 06:05:27,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:05:27,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:05:27,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:05:28,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:05:28,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:05:28,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328872608] [2024-11-09 06:05:28,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328872608] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:05:28,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:05:28,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-09 06:05:28,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225392128] [2024-11-09 06:05:28,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:05:28,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 06:05:28,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:05:28,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 06:05:28,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2024-11-09 06:05:28,220 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:05:28,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:05:28,458 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2024-11-09 06:05:28,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 06:05:28,459 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 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 [2024-11-09 06:05:28,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:05:28,460 INFO L225 Difference]: With dead ends: 41 [2024-11-09 06:05:28,460 INFO L226 Difference]: Without dead ends: 41 [2024-11-09 06:05:28,460 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-11-09 06:05:28,461 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 8 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:05:28,461 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 68 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:05:28,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-09 06:05:28,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2024-11-09 06:05:28,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 38 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) [2024-11-09 06:05:28,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2024-11-09 06:05:28,465 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 15 [2024-11-09 06:05:28,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:05:28,466 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2024-11-09 06:05:28,466 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:05:28,466 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2024-11-09 06:05:28,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-09 06:05:28,467 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:05:28,467 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:05:28,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-09 06:05:28,468 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 06:05:28,468 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:05:28,469 INFO L85 PathProgramCache]: Analyzing trace with hash 845306383, now seen corresponding path program 1 times [2024-11-09 06:05:28,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:05:28,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802778739] [2024-11-09 06:05:28,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:05:28,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:05:28,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:05:28,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:05:28,743 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:05:28,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802778739] [2024-11-09 06:05:28,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802778739] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:05:28,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:05:28,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-09 06:05:28,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038182546] [2024-11-09 06:05:28,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:05:28,746 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 06:05:28,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:05:28,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 06:05:28,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-09 06:05:28,747 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:05:28,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:05:28,872 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2024-11-09 06:05:28,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 06:05:28,872 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 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 [2024-11-09 06:05:28,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:05:28,873 INFO L225 Difference]: With dead ends: 66 [2024-11-09 06:05:28,874 INFO L226 Difference]: Without dead ends: 57 [2024-11-09 06:05:28,874 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 [2024-11-09 06:05:28,877 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 18 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:05:28,877 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 66 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:05:28,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-09 06:05:28,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2024-11-09 06:05:28,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 50 states have (on average 1.2) internal successors, (60), 51 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:05:28,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2024-11-09 06:05:28,881 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 15 [2024-11-09 06:05:28,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:05:28,881 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2024-11-09 06:05:28,882 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:05:28,882 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2024-11-09 06:05:28,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-09 06:05:28,883 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:05:28,883 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:05:28,883 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-09 06:05:28,883 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 06:05:28,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:05:28,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1900312205, now seen corresponding path program 1 times [2024-11-09 06:05:28,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:05:28,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401010011] [2024-11-09 06:05:28,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:05:28,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:05:28,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:05:29,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:05:29,194 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:05:29,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401010011] [2024-11-09 06:05:29,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401010011] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:05:29,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785717915] [2024-11-09 06:05:29,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:05:29,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:05:29,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:05:29,198 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:05:29,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 06:05:29,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:05:29,297 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-09 06:05:29,299 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:05:29,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:05:29,452 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:05:29,662 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 [2024-11-09 06:05:29,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:05:29,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785717915] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:05:29,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [645074335] [2024-11-09 06:05:29,710 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 06:05:29,710 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:05:29,711 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:05:29,711 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:05:29,712 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:05:31,193 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:05:33,072 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1318#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_21| Int) (|v_ULTIMATE.start_cstrcspn_#t~post2#1.base_21| Int)) (and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_21|) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post2#1.base_21|) |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_21|) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post2#1.base_21|) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|)))' at error location [2024-11-09 06:05:33,072 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:05:33,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:05:33,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2024-11-09 06:05:33,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189999320] [2024-11-09 06:05:33,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:05:33,073 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 06:05:33,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:05:33,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 06:05:33,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1012, Unknown=0, NotChecked=0, Total=1122 [2024-11-09 06:05:33,075 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:05:33,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:05:33,339 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2024-11-09 06:05:33,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 06:05:33,340 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 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 18 [2024-11-09 06:05:33,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:05:33,340 INFO L225 Difference]: With dead ends: 69 [2024-11-09 06:05:33,340 INFO L226 Difference]: Without dead ends: 69 [2024-11-09 06:05:33,341 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=126, Invalid=1134, Unknown=0, NotChecked=0, Total=1260 [2024-11-09 06:05:33,343 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:05:33,345 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 184 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:05:33,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-09 06:05:33,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2024-11-09 06:05:33,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 64 states have (on average 1.1875) internal successors, (76), 65 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:05:33,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2024-11-09 06:05:33,349 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 18 [2024-11-09 06:05:33,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:05:33,350 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2024-11-09 06:05:33,350 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:05:33,350 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2024-11-09 06:05:33,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-09 06:05:33,351 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:05:33,351 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:05:33,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 06:05:33,552 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:05:33,553 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)] === [2024-11-09 06:05:33,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:05:33,553 INFO L85 PathProgramCache]: Analyzing trace with hash 482314259, now seen corresponding path program 1 times [2024-11-09 06:05:33,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:05:33,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689688173] [2024-11-09 06:05:33,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:05:33,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:05:33,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:05:33,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:05:33,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:05:33,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689688173] [2024-11-09 06:05:33,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689688173] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:05:33,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933517774] [2024-11-09 06:05:33,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:05:33,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:05:33,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:05:33,948 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:05:33,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 06:05:34,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:05:34,046 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-09 06:05:34,048 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:05:34,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:05:34,202 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:05:34,399 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 [2024-11-09 06:05:34,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:05:34,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933517774] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:05:34,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [870599933] [2024-11-09 06:05:34,445 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 06:05:34,445 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:05:34,446 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:05:34,446 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:05:34,446 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:05:35,498 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:05:37,219 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1594#(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 [2024-11-09 06:05:37,220 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:05:37,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:05:37,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2024-11-09 06:05:37,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638634101] [2024-11-09 06:05:37,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:05:37,221 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 06:05:37,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:05:37,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 06:05:37,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1080, Unknown=2, NotChecked=0, Total=1190 [2024-11-09 06:05:37,222 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand has 21 states, 20 states have (on average 2.05) internal successors, (41), 21 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) [2024-11-09 06:05:37,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:05:37,630 INFO L93 Difference]: Finished difference Result 88 states and 99 transitions. [2024-11-09 06:05:37,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 06:05:37,630 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.05) internal successors, (41), 21 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 18 [2024-11-09 06:05:37,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:05:37,632 INFO L225 Difference]: With dead ends: 88 [2024-11-09 06:05:37,633 INFO L226 Difference]: Without dead ends: 88 [2024-11-09 06:05:37,634 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=152, Invalid=1406, Unknown=2, NotChecked=0, Total=1560 [2024-11-09 06:05:37,634 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 46 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:05:37,635 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 200 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:05:37,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-09 06:05:37,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 78. [2024-11-09 06:05:37,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 76 states have (on average 1.1842105263157894) internal successors, (90), 77 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:05:37,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 90 transitions. [2024-11-09 06:05:37,640 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 90 transitions. Word has length 18 [2024-11-09 06:05:37,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:05:37,640 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 90 transitions. [2024-11-09 06:05:37,641 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.05) internal successors, (41), 21 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) [2024-11-09 06:05:37,641 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 90 transitions. [2024-11-09 06:05:37,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-09 06:05:37,642 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:05:37,642 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:05:37,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 06:05:37,846 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 06:05:37,847 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 06:05:37,847 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:05:37,847 INFO L85 PathProgramCache]: Analyzing trace with hash 612765208, now seen corresponding path program 2 times [2024-11-09 06:05:37,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:05:37,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743991862] [2024-11-09 06:05:37,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:05:37,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:05:37,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:05:38,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:05:38,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:05:38,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743991862] [2024-11-09 06:05:38,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743991862] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:05:38,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222706257] [2024-11-09 06:05:38,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:05:38,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:05:38,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:05:38,292 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:05:38,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 06:05:38,404 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 06:05:38,404 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:05:38,406 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-09 06:05:38,409 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:05:38,498 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 [2024-11-09 06:05:38,596 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:05:38,596 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:05:38,623 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 [2024-11-09 06:05:38,628 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 [2024-11-09 06:05:38,702 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:05:38,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222706257] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:05:38,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1026638864] [2024-11-09 06:05:38,705 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 06:05:38,705 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:05:38,705 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:05:38,706 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:05:38,707 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:05:39,731 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:05:41,538 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1933#(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 [2024-11-09 06:05:41,538 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:05:41,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:05:41,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 23 [2024-11-09 06:05:41,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453493110] [2024-11-09 06:05:41,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:05:41,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-09 06:05:41,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:05:41,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-09 06:05:41,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1211, Unknown=2, NotChecked=0, Total=1332 [2024-11-09 06:05:41,541 INFO L87 Difference]: Start difference. First operand 78 states and 90 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:05:41,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:05:41,948 INFO L93 Difference]: Finished difference Result 132 states and 147 transitions. [2024-11-09 06:05:41,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 06:05:41,949 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 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 22 [2024-11-09 06:05:41,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:05:41,949 INFO L225 Difference]: With dead ends: 132 [2024-11-09 06:05:41,949 INFO L226 Difference]: Without dead ends: 119 [2024-11-09 06:05:41,950 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=166, Invalid=1724, Unknown=2, NotChecked=0, Total=1892 [2024-11-09 06:05:41,951 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 43 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:05:41,951 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 281 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:05:41,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-11-09 06:05:41,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 109. [2024-11-09 06:05:41,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 108 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) [2024-11-09 06:05:41,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 125 transitions. [2024-11-09 06:05:41,956 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 125 transitions. Word has length 22 [2024-11-09 06:05:41,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:05:41,957 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 125 transitions. [2024-11-09 06:05:41,957 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:05:41,957 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 125 transitions. [2024-11-09 06:05:41,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-09 06:05:41,958 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:05:41,958 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:05:41,981 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 06:05:42,159 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-09 06:05:42,159 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 06:05:42,160 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:05:42,160 INFO L85 PathProgramCache]: Analyzing trace with hash 943399576, now seen corresponding path program 2 times [2024-11-09 06:05:42,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:05:42,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766482919] [2024-11-09 06:05:42,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:05:42,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:05:42,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:05:42,656 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:05:42,657 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:05:42,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766482919] [2024-11-09 06:05:42,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766482919] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:05:42,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443357860] [2024-11-09 06:05:42,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:05:42,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:05:42,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:05:42,660 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:05:42,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 06:05:42,779 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 06:05:42,780 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:05:42,782 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-09 06:05:42,786 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:05:42,794 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 [2024-11-09 06:05:42,933 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 [2024-11-09 06:05:42,961 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 [2024-11-09 06:05:43,036 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:05:43,036 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:05:43,130 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:05:43,131 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 [2024-11-09 06:05:43,139 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:05:43,140 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 [2024-11-09 06:05:43,253 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:05:43,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443357860] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:05:43,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [894345250] [2024-11-09 06:05:43,256 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 06:05:43,256 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:05:43,256 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:05:43,256 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:05:43,256 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:05:44,464 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:05:45,957 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2364#(and (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrcspn_#t~post2#1.base_37| Int) (|v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_37| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_37|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post2#1.base_37|) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post2#1.base_37|) |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_37|) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|))))' at error location [2024-11-09 06:05:45,957 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:05:45,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:05:45,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 23 [2024-11-09 06:05:45,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767160316] [2024-11-09 06:05:45,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:05:45,958 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-09 06:05:45,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:05:45,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-09 06:05:45,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1287, Unknown=3, NotChecked=0, Total=1406 [2024-11-09 06:05:45,959 INFO L87 Difference]: Start difference. First operand 109 states and 125 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:05:46,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:05:46,274 INFO L93 Difference]: Finished difference Result 189 states and 210 transitions. [2024-11-09 06:05:46,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 06:05:46,275 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 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 24 [2024-11-09 06:05:46,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:05:46,276 INFO L225 Difference]: With dead ends: 189 [2024-11-09 06:05:46,276 INFO L226 Difference]: Without dead ends: 151 [2024-11-09 06:05:46,277 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=141, Invalid=1578, Unknown=3, NotChecked=0, Total=1722 [2024-11-09 06:05:46,277 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 13 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:05:46,278 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 259 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:05:46,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-11-09 06:05:46,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 135. [2024-11-09 06:05:46,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 133 states have (on average 1.1729323308270676) internal successors, (156), 134 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:05:46,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 156 transitions. [2024-11-09 06:05:46,283 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 156 transitions. Word has length 24 [2024-11-09 06:05:46,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:05:46,283 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 156 transitions. [2024-11-09 06:05:46,283 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:05:46,283 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 156 transitions. [2024-11-09 06:05:46,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-09 06:05:46,284 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:05:46,285 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:05:46,304 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 06:05:46,489 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:05:46,489 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 06:05:46,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:05:46,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1562235796, now seen corresponding path program 3 times [2024-11-09 06:05:46,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:05:46,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075562975] [2024-11-09 06:05:46,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:05:46,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:05:46,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:05:46,899 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:05:46,899 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:05:46,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075562975] [2024-11-09 06:05:46,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075562975] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:05:46,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898301464] [2024-11-09 06:05:46,900 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:05:46,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:05:46,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:05:46,902 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:05:46,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 06:05:46,992 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:05:46,993 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:05:46,996 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-09 06:05:46,998 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:05:47,154 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:05:47,154 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:05:47,345 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 [2024-11-09 06:05:47,391 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:05:47,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898301464] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:05:47,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [534382027] [2024-11-09 06:05:47,393 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 06:05:47,393 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:05:47,394 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:05:47,394 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:05:47,394 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:05:48,214 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:05:50,068 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2878#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_62| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_63| 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 |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_62|) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_62|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_63|) (<= 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_63|) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|)))' at error location [2024-11-09 06:05:50,069 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:05:50,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:05:50,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2024-11-09 06:05:50,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583398023] [2024-11-09 06:05:50,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:05:50,069 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-09 06:05:50,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:05:50,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-09 06:05:50,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1289, Unknown=2, NotChecked=0, Total=1406 [2024-11-09 06:05:50,071 INFO L87 Difference]: Start difference. First operand 135 states and 156 transitions. Second operand has 24 states, 23 states have (on average 2.391304347826087) internal successors, (55), 24 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) [2024-11-09 06:05:50,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:05:50,583 INFO L93 Difference]: Finished difference Result 166 states and 189 transitions. [2024-11-09 06:05:50,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 06:05:50,584 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.391304347826087) internal successors, (55), 24 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 25 [2024-11-09 06:05:50,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:05:50,585 INFO L225 Difference]: With dead ends: 166 [2024-11-09 06:05:50,585 INFO L226 Difference]: Without dead ends: 166 [2024-11-09 06:05:50,585 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=179, Invalid=1799, Unknown=2, NotChecked=0, Total=1980 [2024-11-09 06:05:50,586 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 71 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:05:50,586 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 206 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 06:05:50,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-11-09 06:05:50,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 151. [2024-11-09 06:05:50,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 149 states have (on average 1.174496644295302) internal successors, (175), 150 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:05:50,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 175 transitions. [2024-11-09 06:05:50,597 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 175 transitions. Word has length 25 [2024-11-09 06:05:50,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:05:50,597 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 175 transitions. [2024-11-09 06:05:50,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.391304347826087) internal successors, (55), 24 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) [2024-11-09 06:05:50,597 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 175 transitions. [2024-11-09 06:05:50,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-09 06:05:50,603 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:05:50,603 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:05:50,628 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 06:05:50,803 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:05:50,804 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 06:05:50,804 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:05:50,805 INFO L85 PathProgramCache]: Analyzing trace with hash -246715022, now seen corresponding path program 3 times [2024-11-09 06:05:50,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:05:50,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782049757] [2024-11-09 06:05:50,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:05:50,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:05:50,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:05:51,189 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:05:51,189 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:05:51,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782049757] [2024-11-09 06:05:51,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782049757] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:05:51,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979175578] [2024-11-09 06:05:51,190 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:05:51,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:05:51,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:05:51,193 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:05:51,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 06:05:51,319 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:05:51,319 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:05:51,321 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-09 06:05:51,324 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:05:51,571 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:05:51,571 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:05:51,804 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 [2024-11-09 06:05:51,954 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:05:51,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979175578] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:05:51,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [342957376] [2024-11-09 06:05:51,958 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 06:05:51,958 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:05:51,959 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:05:51,959 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:05:51,959 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:05:52,933 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:05:54,693 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3403#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post2#1.base_49| Int) (|v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_49| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_49|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post2#1.base_49|) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post2#1.base_49|) |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_49|) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (or (and (= |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_49| 0) (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0)) (and (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (= |ULTIMATE.start_cstrcspn_~spanp~0#1.offset| 1) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0)))))' at error location [2024-11-09 06:05:54,693 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:05:54,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:05:54,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2024-11-09 06:05:54,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780095422] [2024-11-09 06:05:54,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:05:54,694 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-09 06:05:54,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:05:54,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-09 06:05:54,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1282, Unknown=0, NotChecked=0, Total=1406 [2024-11-09 06:05:54,695 INFO L87 Difference]: Start difference. First operand 151 states and 175 transitions. Second operand has 24 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:05:54,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:05:54,982 INFO L93 Difference]: Finished difference Result 185 states and 212 transitions. [2024-11-09 06:05:54,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 06:05:54,982 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 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 [2024-11-09 06:05:54,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:05:54,983 INFO L225 Difference]: With dead ends: 185 [2024-11-09 06:05:54,983 INFO L226 Difference]: Without dead ends: 185 [2024-11-09 06:05:54,984 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=139, Invalid=1421, Unknown=0, NotChecked=0, Total=1560 [2024-11-09 06:05:54,985 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:05:54,985 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 218 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:05:54,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2024-11-09 06:05:54,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 183. [2024-11-09 06:05:54,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 181 states have (on average 1.171270718232044) internal successors, (212), 182 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:05:54,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 212 transitions. [2024-11-09 06:05:54,996 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 212 transitions. Word has length 27 [2024-11-09 06:05:54,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:05:54,997 INFO L471 AbstractCegarLoop]: Abstraction has 183 states and 212 transitions. [2024-11-09 06:05:54,997 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:05:54,997 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 212 transitions. [2024-11-09 06:05:54,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-09 06:05:54,998 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:05:54,998 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:05:55,025 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 06:05:55,202 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-09 06:05:55,202 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)] === [2024-11-09 06:05:55,203 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:05:55,203 INFO L85 PathProgramCache]: Analyzing trace with hash 769700121, now seen corresponding path program 4 times [2024-11-09 06:05:55,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:05:55,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591820797] [2024-11-09 06:05:55,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:05:55,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:05:55,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:05:55,618 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:05:55,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:05:55,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591820797] [2024-11-09 06:05:55,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591820797] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:05:55,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620098650] [2024-11-09 06:05:55,618 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:05:55,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:05:55,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:05:55,620 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:05:55,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 06:05:55,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:05:55,716 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-09 06:05:55,720 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:05:55,816 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 [2024-11-09 06:05:55,878 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:05:55,879 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:05:55,912 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 [2024-11-09 06:05:55,914 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 [2024-11-09 06:05:55,980 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:05:55,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620098650] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:05:55,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2126797059] [2024-11-09 06:05:55,982 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 06:05:55,982 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:05:55,983 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:05:55,983 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:05:55,983 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:05:56,871 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:05:58,562 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3981#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_85| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_86| Int)) (and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_86|) (<= 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 |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_85|) (<= 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_85|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_86|) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|)))' at error location [2024-11-09 06:05:58,563 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:05:58,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:05:58,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 24 [2024-11-09 06:05:58,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030203735] [2024-11-09 06:05:58,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:05:58,563 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-09 06:05:58,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:05:58,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-09 06:05:58,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1287, Unknown=2, NotChecked=0, Total=1406 [2024-11-09 06:05:58,565 INFO L87 Difference]: Start difference. First operand 183 states and 212 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:05:59,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:05:59,003 INFO L93 Difference]: Finished difference Result 298 states and 337 transitions. [2024-11-09 06:05:59,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-09 06:05:59,004 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 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 [2024-11-09 06:05:59,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:05:59,005 INFO L225 Difference]: With dead ends: 298 [2024-11-09 06:05:59,006 INFO L226 Difference]: Without dead ends: 260 [2024-11-09 06:05:59,006 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=177, Invalid=1983, Unknown=2, NotChecked=0, Total=2162 [2024-11-09 06:05:59,007 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 66 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:05:59,007 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 276 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:05:59,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2024-11-09 06:05:59,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 239. [2024-11-09 06:05:59,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 237 states have (on average 1.1645569620253164) internal successors, (276), 238 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:05:59,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 276 transitions. [2024-11-09 06:05:59,015 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 276 transitions. Word has length 29 [2024-11-09 06:05:59,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:05:59,016 INFO L471 AbstractCegarLoop]: Abstraction has 239 states and 276 transitions. [2024-11-09 06:05:59,016 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:05:59,016 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 276 transitions. [2024-11-09 06:05:59,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-09 06:05:59,018 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:05:59,018 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:05:59,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 06:05:59,219 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:05:59,219 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 06:05:59,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:05:59,219 INFO L85 PathProgramCache]: Analyzing trace with hash 100861981, now seen corresponding path program 5 times [2024-11-09 06:05:59,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:05:59,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116382778] [2024-11-09 06:05:59,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:05:59,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:05:59,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:05:59,709 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:05:59,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:05:59,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116382778] [2024-11-09 06:05:59,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116382778] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:05:59,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775661733] [2024-11-09 06:05:59,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:05:59,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:05:59,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:05:59,712 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:05:59,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 06:05:59,833 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-09 06:05:59,834 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:05:59,836 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-09 06:05:59,838 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:06:00,114 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:06:00,114 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:06:00,404 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 [2024-11-09 06:06:00,485 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:06:00,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775661733] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:06:00,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [680113951] [2024-11-09 06:06:00,488 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 06:06:00,488 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:06:00,488 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:06:00,488 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:06:00,488 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:06:01,195 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:06:03,106 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4768#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_100| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_98| Int)) (and (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_100|) (<= 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_98|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_100|) (<= 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_98|) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|)))' at error location [2024-11-09 06:06:03,107 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:06:03,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:06:03,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2024-11-09 06:06:03,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906733141] [2024-11-09 06:06:03,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:06:03,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-09 06:06:03,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:06:03,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-09 06:06:03,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1897, Unknown=2, NotChecked=0, Total=2070 [2024-11-09 06:06:03,109 INFO L87 Difference]: Start difference. First operand 239 states and 276 transitions. Second operand has 32 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 32 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) [2024-11-09 06:06:03,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:06:03,784 INFO L93 Difference]: Finished difference Result 287 states and 327 transitions. [2024-11-09 06:06:03,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-09 06:06:03,785 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 32 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 32 [2024-11-09 06:06:03,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:06:03,786 INFO L225 Difference]: With dead ends: 287 [2024-11-09 06:06:03,786 INFO L226 Difference]: Without dead ends: 287 [2024-11-09 06:06:03,787 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 58 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=281, Invalid=2687, Unknown=2, NotChecked=0, Total=2970 [2024-11-09 06:06:03,788 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 56 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:06:03,788 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 374 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 06:06:03,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2024-11-09 06:06:03,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 259. [2024-11-09 06:06:03,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 257 states have (on average 1.1673151750972763) internal successors, (300), 258 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:06:03,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 300 transitions. [2024-11-09 06:06:03,797 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 300 transitions. Word has length 32 [2024-11-09 06:06:03,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:06:03,797 INFO L471 AbstractCegarLoop]: Abstraction has 259 states and 300 transitions. [2024-11-09 06:06:03,798 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 32 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) [2024-11-09 06:06:03,798 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 300 transitions. [2024-11-09 06:06:03,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-09 06:06:03,799 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:06:03,799 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:06:03,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 06:06:04,002 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:06:04,002 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)] === [2024-11-09 06:06:04,003 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:06:04,003 INFO L85 PathProgramCache]: Analyzing trace with hash 191482711, now seen corresponding path program 4 times [2024-11-09 06:06:04,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:06:04,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149891676] [2024-11-09 06:06:04,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:06:04,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:06:04,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:06:04,899 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:06:04,900 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:06:04,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149891676] [2024-11-09 06:06:04,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149891676] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:06:04,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113572884] [2024-11-09 06:06:04,900 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:06:04,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:06:04,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:06:04,903 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:06:04,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 06:06:05,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:06:05,024 INFO L255 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-09 06:06:05,027 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:06:05,040 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 [2024-11-09 06:06:05,261 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 [2024-11-09 06:06:05,315 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 [2024-11-09 06:06:05,551 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:06:05,552 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:06:05,684 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:06:05,685 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 [2024-11-09 06:06:05,697 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:06:05,698 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 [2024-11-09 06:06:05,879 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:06:05,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113572884] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:06:05,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [129603700] [2024-11-09 06:06:05,881 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 06:06:05,881 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:06:05,882 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:06:05,882 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:06:05,882 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:06:06,769 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:06:08,644 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5572#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_66| Int) (|v_ULTIMATE.start_cstrcspn_#t~post2#1.base_66| Int)) (and (<= 1 |#StackHeapBarrier|) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post2#1.base_66|) |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_66|) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_66|) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post2#1.base_66|) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (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) (= |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_66| 0) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0)))))' at error location [2024-11-09 06:06:08,644 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:06:08,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:06:08,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 13] total 33 [2024-11-09 06:06:08,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831056206] [2024-11-09 06:06:08,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:06:08,645 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-09 06:06:08,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:06:08,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-09 06:06:08,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2114, Unknown=8, NotChecked=0, Total=2256 [2024-11-09 06:06:08,646 INFO L87 Difference]: Start difference. First operand 259 states and 300 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 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) [2024-11-09 06:06:09,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:06:09,428 INFO L93 Difference]: Finished difference Result 499 states and 560 transitions. [2024-11-09 06:06:09,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-09 06:06:09,428 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 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 33 [2024-11-09 06:06:09,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:06:09,430 INFO L225 Difference]: With dead ends: 499 [2024-11-09 06:06:09,430 INFO L226 Difference]: Without dead ends: 362 [2024-11-09 06:06:09,431 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=177, Invalid=3006, Unknown=9, NotChecked=0, Total=3192 [2024-11-09 06:06:09,432 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 21 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 06:06:09,432 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 385 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 06:06:09,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2024-11-09 06:06:09,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 296. [2024-11-09 06:06:09,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 294 states have (on average 1.1700680272108843) internal successors, (344), 295 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:06:09,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 344 transitions. [2024-11-09 06:06:09,445 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 344 transitions. Word has length 33 [2024-11-09 06:06:09,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:06:09,445 INFO L471 AbstractCegarLoop]: Abstraction has 296 states and 344 transitions. [2024-11-09 06:06:09,446 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 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) [2024-11-09 06:06:09,446 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 344 transitions. [2024-11-09 06:06:09,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-09 06:06:09,449 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:06:09,449 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:06:09,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-09 06:06:09,653 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-09 06:06:09,653 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 06:06:09,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:06:09,654 INFO L85 PathProgramCache]: Analyzing trace with hash -979954243, now seen corresponding path program 5 times [2024-11-09 06:06:09,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:06:09,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629511721] [2024-11-09 06:06:09,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:06:09,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:06:09,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:06:10,106 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:06:10,106 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:06:10,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629511721] [2024-11-09 06:06:10,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629511721] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:06:10,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866489941] [2024-11-09 06:06:10,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:06:10,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:06:10,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:06:10,109 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:06:10,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 06:06:10,250 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-09 06:06:10,250 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:06:10,251 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-09 06:06:10,253 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:06:10,537 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:06:10,538 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:06:10,838 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 [2024-11-09 06:06:10,917 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:06:10,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866489941] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:06:10,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [697721684] [2024-11-09 06:06:10,918 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 06:06:10,918 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:06:10,919 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:06:10,919 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:06:10,919 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:06:11,848 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:06:13,422 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6640#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_77| Int) (|v_ULTIMATE.start_cstrcspn_#t~post2#1.base_76| Int)) (and (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post2#1.base_76|) |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_77|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post2#1.base_76|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_77|) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|)))' at error location [2024-11-09 06:06:13,423 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:06:13,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:06:13,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2024-11-09 06:06:13,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845227080] [2024-11-09 06:06:13,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:06:13,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-09 06:06:13,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:06:13,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-09 06:06:13,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1810, Unknown=0, NotChecked=0, Total=1980 [2024-11-09 06:06:13,425 INFO L87 Difference]: Start difference. First operand 296 states and 344 transitions. Second operand has 31 states, 30 states have (on average 3.1333333333333333) internal successors, (94), 30 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:06:13,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:06:13,840 INFO L93 Difference]: Finished difference Result 349 states and 402 transitions. [2024-11-09 06:06:13,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-09 06:06:13,841 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.1333333333333333) internal successors, (94), 30 states have internal predecessors, (94), 0 states have call successors, (0), 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 36 [2024-11-09 06:06:13,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:06:13,843 INFO L225 Difference]: With dead ends: 349 [2024-11-09 06:06:13,843 INFO L226 Difference]: Without dead ends: 349 [2024-11-09 06:06:13,843 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 70 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=212, Invalid=2140, Unknown=0, NotChecked=0, Total=2352 [2024-11-09 06:06:13,844 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 17 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:06:13,844 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 298 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 06:06:13,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2024-11-09 06:06:13,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 346. [2024-11-09 06:06:13,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 344 states have (on average 1.1686046511627908) internal successors, (402), 345 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:06:13,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 402 transitions. [2024-11-09 06:06:13,854 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 402 transitions. Word has length 36 [2024-11-09 06:06:13,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:06:13,855 INFO L471 AbstractCegarLoop]: Abstraction has 346 states and 402 transitions. [2024-11-09 06:06:13,855 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.1333333333333333) internal successors, (94), 30 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:06:13,855 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 402 transitions. [2024-11-09 06:06:13,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-09 06:06:13,856 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:06:13,856 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:06:13,877 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-09 06:06:14,057 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-09 06:06:14,057 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)] === [2024-11-09 06:06:14,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:06:14,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1063880414, now seen corresponding path program 6 times [2024-11-09 06:06:14,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:06:14,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356332524] [2024-11-09 06:06:14,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:06:14,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:06:14,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:06:14,539 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:06:14,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:06:14,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356332524] [2024-11-09 06:06:14,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356332524] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:06:14,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415357686] [2024-11-09 06:06:14,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:06:14,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:06:14,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:06:14,541 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:06:14,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 06:06:14,643 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:06:14,643 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:06:14,645 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-09 06:06:14,647 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:06:14,776 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 [2024-11-09 06:06:14,853 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:06:14,854 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:06:14,888 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 [2024-11-09 06:06:14,891 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 [2024-11-09 06:06:14,967 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:06:14,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415357686] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:06:14,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [840896319] [2024-11-09 06:06:14,970 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 06:06:14,970 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:06:14,971 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:06:14,972 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:06:14,972 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:06:15,738 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:06:17,565 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7594#(and (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_136| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_138| Int)) (and (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_136|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_138|) (<= 1 |#StackHeapBarrier|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_136|) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_138|) (<= 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 [2024-11-09 06:06:17,565 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:06:17,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:06:17,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 27 [2024-11-09 06:06:17,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211893482] [2024-11-09 06:06:17,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:06:17,566 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-09 06:06:17,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:06:17,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-09 06:06:17,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1513, Unknown=2, NotChecked=0, Total=1640 [2024-11-09 06:06:17,567 INFO L87 Difference]: Start difference. First operand 346 states and 402 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:06:18,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:06:18,189 INFO L93 Difference]: Finished difference Result 544 states and 621 transitions. [2024-11-09 06:06:18,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 06:06:18,190 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 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 36 [2024-11-09 06:06:18,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:06:18,192 INFO L225 Difference]: With dead ends: 544 [2024-11-09 06:06:18,192 INFO L226 Difference]: Without dead ends: 471 [2024-11-09 06:06:18,193 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=197, Invalid=2453, Unknown=2, NotChecked=0, Total=2652 [2024-11-09 06:06:18,194 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 78 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:06:18,195 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 385 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 06:06:18,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2024-11-09 06:06:18,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 435. [2024-11-09 06:06:18,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 433 states have (on average 1.166281755196305) internal successors, (505), 434 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:06:18,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 505 transitions. [2024-11-09 06:06:18,207 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 505 transitions. Word has length 36 [2024-11-09 06:06:18,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:06:18,208 INFO L471 AbstractCegarLoop]: Abstraction has 435 states and 505 transitions. [2024-11-09 06:06:18,208 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:06:18,208 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 505 transitions. [2024-11-09 06:06:18,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-09 06:06:18,209 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:06:18,209 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:06:18,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-09 06:06:18,413 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-09 06:06:18,413 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 06:06:18,414 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:06:18,414 INFO L85 PathProgramCache]: Analyzing trace with hash 66647454, now seen corresponding path program 7 times [2024-11-09 06:06:18,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:06:18,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990089734] [2024-11-09 06:06:18,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:06:18,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:06:18,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:06:18,917 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:06:18,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:06:18,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990089734] [2024-11-09 06:06:18,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990089734] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:06:18,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722248976] [2024-11-09 06:06:18,918 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:06:18,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:06:18,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:06:18,920 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:06:18,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 06:06:19,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:06:19,042 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-09 06:06:19,044 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:06:19,323 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:06:19,323 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:06:19,660 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 [2024-11-09 06:06:19,779 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:06:19,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722248976] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:06:19,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [559167060] [2024-11-09 06:06:19,781 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 06:06:19,782 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:06:19,782 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:06:19,782 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:06:19,782 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:06:20,512 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:06:22,377 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8869#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_151| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_154| Int)) (and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_151|) (<= 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_154|) (= |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_151|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_154|) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|)))' at error location [2024-11-09 06:06:22,377 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:06:22,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:06:22,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2024-11-09 06:06:22,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421277465] [2024-11-09 06:06:22,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:06:22,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-09 06:06:22,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:06:22,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-09 06:06:22,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1904, Unknown=2, NotChecked=0, Total=2070 [2024-11-09 06:06:22,380 INFO L87 Difference]: Start difference. First operand 435 states and 505 transitions. Second operand has 32 states, 31 states have (on average 2.6774193548387095) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:06:23,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:06:23,217 INFO L93 Difference]: Finished difference Result 514 states and 589 transitions. [2024-11-09 06:06:23,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 06:06:23,218 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.6774193548387095) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 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 [2024-11-09 06:06:23,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:06:23,220 INFO L225 Difference]: With dead ends: 514 [2024-11-09 06:06:23,220 INFO L226 Difference]: Without dead ends: 514 [2024-11-09 06:06:23,222 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 80 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=276, Invalid=2914, Unknown=2, NotChecked=0, Total=3192 [2024-11-09 06:06:23,222 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 137 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:06:23,223 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 428 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 06:06:23,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2024-11-09 06:06:23,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 463. [2024-11-09 06:06:23,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 461 states have (on average 1.1691973969631237) internal successors, (539), 462 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:06:23,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 539 transitions. [2024-11-09 06:06:23,237 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 539 transitions. Word has length 39 [2024-11-09 06:06:23,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:06:23,238 INFO L471 AbstractCegarLoop]: Abstraction has 463 states and 539 transitions. [2024-11-09 06:06:23,238 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.6774193548387095) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:06:23,238 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 539 transitions. [2024-11-09 06:06:23,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-09 06:06:23,239 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:06:23,239 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:06:23,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-09 06:06:23,443 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-09 06:06:23,443 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 06:06:23,444 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:06:23,444 INFO L85 PathProgramCache]: Analyzing trace with hash -775237790, now seen corresponding path program 6 times [2024-11-09 06:06:23,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:06:23,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584306772] [2024-11-09 06:06:23,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:06:23,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:06:23,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:06:24,414 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:06:24,414 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:06:24,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584306772] [2024-11-09 06:06:24,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584306772] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:06:24,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498422580] [2024-11-09 06:06:24,414 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:06:24,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:06:24,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:06:24,416 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:06:24,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 06:06:24,537 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:06:24,537 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:06:24,539 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-11-09 06:06:24,542 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:06:24,792 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 [2024-11-09 06:06:24,845 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-11-09 06:06:24,845 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 [2024-11-09 06:06:25,652 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:06:25,652 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:06:26,108 INFO L349 Elim1Store]: treesize reduction 36, result has 45.5 percent of original size [2024-11-09 06:06:26,109 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 [2024-11-09 06:06:26,138 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:06:26,139 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 42 treesize of output 42 [2024-11-09 06:06:26,157 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 06:06:26,161 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 6 treesize of output 4 [2024-11-09 06:06:26,174 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 06:06:26,178 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 06:06:26,199 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:06:26,200 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 40 treesize of output 57 [2024-11-09 06:06:26,602 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:06:26,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498422580] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:06:26,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1111225950] [2024-11-09 06:06:26,604 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 06:06:26,605 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:06:26,605 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:06:26,605 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:06:26,605 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:06:27,544 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:06:29,654 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10178#(and (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_96| Int) (|v_ULTIMATE.start_cstrcspn_#t~post2#1.base_95| Int)) (and (<= 1 |#StackHeapBarrier|) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post2#1.base_95|) |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_96|) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_96|) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post2#1.base_95|))) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0))' at error location [2024-11-09 06:06:29,655 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:06:29,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:06:29,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 49 [2024-11-09 06:06:29,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647928371] [2024-11-09 06:06:29,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:06:29,656 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-09 06:06:29,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:06:29,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-09 06:06:29,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=3781, Unknown=0, NotChecked=0, Total=4032 [2024-11-09 06:06:29,657 INFO L87 Difference]: Start difference. First operand 463 states and 539 transitions. Second operand has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:06:30,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:06:30,717 INFO L93 Difference]: Finished difference Result 937 states and 1070 transitions. [2024-11-09 06:06:30,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-09 06:06:30,717 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 0 states have call successors, (0), 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 42 [2024-11-09 06:06:30,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:06:30,719 INFO L225 Difference]: With dead ends: 937 [2024-11-09 06:06:30,719 INFO L226 Difference]: Without dead ends: 643 [2024-11-09 06:06:30,721 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1194 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=284, Invalid=4272, Unknown=0, NotChecked=0, Total=4556 [2024-11-09 06:06:30,721 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 61 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 1123 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 1127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-09 06:06:30,722 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 589 Invalid, 1127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1123 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-09 06:06:30,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2024-11-09 06:06:30,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 513. [2024-11-09 06:06:30,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 511 states have (on average 1.1702544031311155) internal successors, (598), 512 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:06:30,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 598 transitions. [2024-11-09 06:06:30,743 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 598 transitions. Word has length 42 [2024-11-09 06:06:30,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:06:30,744 INFO L471 AbstractCegarLoop]: Abstraction has 513 states and 598 transitions. [2024-11-09 06:06:30,744 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:06:30,744 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 598 transitions. [2024-11-09 06:06:30,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-09 06:06:30,745 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:06:30,745 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:06:30,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-09 06:06:30,946 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-09 06:06:30,946 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 06:06:30,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:06:30,946 INFO L85 PathProgramCache]: Analyzing trace with hash -823673309, now seen corresponding path program 8 times [2024-11-09 06:06:30,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:06:30,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729803177] [2024-11-09 06:06:30,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:06:30,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:06:30,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:06:31,543 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:06:31,544 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:06:31,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729803177] [2024-11-09 06:06:31,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729803177] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:06:31,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303264736] [2024-11-09 06:06:31,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:06:31,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:06:31,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:06:31,546 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:06:31,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 06:06:31,729 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-09 06:06:31,730 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:06:31,732 INFO L255 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-11-09 06:06:31,735 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:06:31,907 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 [2024-11-09 06:06:31,989 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:06:31,990 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:06:32,033 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 [2024-11-09 06:06:32,036 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 [2024-11-09 06:06:32,112 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:06:32,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303264736] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:06:32,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [654809927] [2024-11-09 06:06:32,113 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 06:06:32,114 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:06:32,114 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:06:32,115 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:06:32,115 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:06:32,857 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:06:34,782 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11932#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_183| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_186| 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) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_183|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_186|) (<= 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_183|) (<= 2 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_186|) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|)))' at error location [2024-11-09 06:06:34,782 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:06:34,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:06:34,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 30 [2024-11-09 06:06:34,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050899591] [2024-11-09 06:06:34,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:06:34,783 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-09 06:06:34,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:06:34,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-09 06:06:34,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1757, Unknown=2, NotChecked=0, Total=1892 [2024-11-09 06:06:34,785 INFO L87 Difference]: Start difference. First operand 513 states and 598 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:06:35,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:06:35,511 INFO L93 Difference]: Finished difference Result 798 states and 916 transitions. [2024-11-09 06:06:35,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-09 06:06:35,512 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 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 [2024-11-09 06:06:35,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:06:35,514 INFO L225 Difference]: With dead ends: 798 [2024-11-09 06:06:35,514 INFO L226 Difference]: Without dead ends: 668 [2024-11-09 06:06:35,515 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=217, Invalid=2973, Unknown=2, NotChecked=0, Total=3192 [2024-11-09 06:06:35,516 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 94 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:06:35,516 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 515 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 06:06:35,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2024-11-09 06:06:35,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 621. [2024-11-09 06:06:35,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 619 states have (on average 1.1696284329563813) internal successors, (724), 620 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:06:35,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 724 transitions. [2024-11-09 06:06:35,533 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 724 transitions. Word has length 43 [2024-11-09 06:06:35,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:06:35,533 INFO L471 AbstractCegarLoop]: Abstraction has 621 states and 724 transitions. [2024-11-09 06:06:35,533 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:06:35,534 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 724 transitions. [2024-11-09 06:06:35,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-09 06:06:35,535 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:06:35,535 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:06:35,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-09 06:06:35,739 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-09 06:06:35,739 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 06:06:35,740 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:06:35,740 INFO L85 PathProgramCache]: Analyzing trace with hash -902572100, now seen corresponding path program 7 times [2024-11-09 06:06:35,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:06:35,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867440037] [2024-11-09 06:06:35,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:06:35,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:06:35,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:06:36,236 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:06:36,237 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:06:36,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867440037] [2024-11-09 06:06:36,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867440037] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:06:36,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629729377] [2024-11-09 06:06:36,238 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:06:36,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:06:36,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:06:36,240 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:06:36,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 06:06:36,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:06:36,369 INFO L255 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-09 06:06:36,370 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:06:36,621 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:06:36,622 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:06:36,992 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 [2024-11-09 06:06:37,081 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:06:37,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629729377] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:06:37,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [605498004] [2024-11-09 06:06:37,083 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 06:06:37,083 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:06:37,083 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:06:37,084 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:06:37,084 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:06:37,875 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:06:39,591 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13686#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_111| Int) (|v_ULTIMATE.start_cstrcspn_#t~post2#1.base_109| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post2#1.base_109|) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post2#1.base_109|) |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_111|) (or (and (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (= 0 |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_111|)) (and (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (= |ULTIMATE.start_cstrcspn_~spanp~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|) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_111|)))' at error location [2024-11-09 06:06:39,591 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:06:39,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:06:39,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2024-11-09 06:06:39,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116197986] [2024-11-09 06:06:39,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:06:39,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-09 06:06:39,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:06:39,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-09 06:06:39,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1825, Unknown=0, NotChecked=0, Total=1980 [2024-11-09 06:06:39,594 INFO L87 Difference]: Start difference. First operand 621 states and 724 transitions. Second operand has 31 states, 30 states have (on average 3.1333333333333333) internal successors, (94), 30 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:06:40,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:06:40,129 INFO L93 Difference]: Finished difference Result 719 states and 834 transitions. [2024-11-09 06:06:40,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 06:06:40,129 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.1333333333333333) internal successors, (94), 30 states have internal predecessors, (94), 0 states have call successors, (0), 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 [2024-11-09 06:06:40,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:06:40,132 INFO L225 Difference]: With dead ends: 719 [2024-11-09 06:06:40,132 INFO L226 Difference]: Without dead ends: 719 [2024-11-09 06:06:40,133 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 98 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=195, Invalid=2255, Unknown=0, NotChecked=0, Total=2450 [2024-11-09 06:06:40,134 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 29 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:06:40,134 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 375 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 06:06:40,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2024-11-09 06:06:40,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 715. [2024-11-09 06:06:40,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 713 states have (on average 1.1697054698457223) internal successors, (834), 714 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:06:40,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 834 transitions. [2024-11-09 06:06:40,152 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 834 transitions. Word has length 45 [2024-11-09 06:06:40,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:06:40,153 INFO L471 AbstractCegarLoop]: Abstraction has 715 states and 834 transitions. [2024-11-09 06:06:40,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.1333333333333333) internal successors, (94), 30 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:06:40,153 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 834 transitions. [2024-11-09 06:06:40,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-09 06:06:40,154 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:06:40,154 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:06:40,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-09 06:06:40,355 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:06:40,355 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)] === [2024-11-09 06:06:40,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:06:40,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1139573209, now seen corresponding path program 9 times [2024-11-09 06:06:40,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:06:40,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122832467] [2024-11-09 06:06:40,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:06:40,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:06:40,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:06:41,018 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:06:41,018 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:06:41,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122832467] [2024-11-09 06:06:41,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122832467] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:06:41,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166458374] [2024-11-09 06:06:41,019 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:06:41,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:06:41,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:06:41,020 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:06:41,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-09 06:06:41,132 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:06:41,133 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:06:41,140 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-11-09 06:06:41,142 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:06:41,442 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 22 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:06:41,442 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:06:41,880 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 5 treesize of output 3 [2024-11-09 06:06:42,039 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 22 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:06:42,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166458374] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:06:42,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1110683712] [2024-11-09 06:06:42,041 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 06:06:42,042 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:06:42,043 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:06:42,043 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:06:42,047 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:06:42,782 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:06:44,846 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15450#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_213| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_217| Int)) (and (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_213|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_217|) (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_217|) (= |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_213|) (= |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 [2024-11-09 06:06:44,846 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:06:44,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:06:44,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2024-11-09 06:06:44,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523741523] [2024-11-09 06:06:44,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:06:44,847 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-09 06:06:44,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:06:44,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-09 06:06:44,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=2261, Unknown=2, NotChecked=0, Total=2450 [2024-11-09 06:06:44,849 INFO L87 Difference]: Start difference. First operand 715 states and 834 transitions. Second operand has 36 states, 35 states have (on average 2.7714285714285714) internal successors, (97), 36 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) [2024-11-09 06:06:45,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:06:45,845 INFO L93 Difference]: Finished difference Result 837 states and 963 transitions. [2024-11-09 06:06:45,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-09 06:06:45,845 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.7714285714285714) internal successors, (97), 36 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 46 [2024-11-09 06:06:45,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:06:45,847 INFO L225 Difference]: With dead ends: 837 [2024-11-09 06:06:45,847 INFO L226 Difference]: Without dead ends: 837 [2024-11-09 06:06:45,848 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 98 SyntacticMatches, 6 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1264 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=326, Invalid=3578, Unknown=2, NotChecked=0, Total=3906 [2024-11-09 06:06:45,848 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 115 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 968 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 06:06:45,849 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 557 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 968 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 06:06:45,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2024-11-09 06:06:45,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 751. [2024-11-09 06:06:45,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 749 states have (on average 1.1722296395193592) internal successors, (878), 750 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:06:45,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 878 transitions. [2024-11-09 06:06:45,869 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 878 transitions. Word has length 46 [2024-11-09 06:06:45,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:06:45,870 INFO L471 AbstractCegarLoop]: Abstraction has 751 states and 878 transitions. [2024-11-09 06:06:45,870 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.7714285714285714) internal successors, (97), 36 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) [2024-11-09 06:06:45,870 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 878 transitions. [2024-11-09 06:06:45,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-09 06:06:45,871 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:06:45,871 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:06:45,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-09 06:06:46,075 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:06:46,075 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 06:06:46,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:06:46,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1846073900, now seen corresponding path program 10 times [2024-11-09 06:06:46,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:06:46,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315252598] [2024-11-09 06:06:46,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:06:46,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:06:46,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:06:46,737 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 12 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:06:46,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:06:46,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315252598] [2024-11-09 06:06:46,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315252598] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:06:46,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888379080] [2024-11-09 06:06:46,737 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:06:46,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:06:46,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:06:46,739 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:06:46,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-09 06:06:46,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:06:46,870 INFO L255 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-11-09 06:06:46,872 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:06:47,057 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 [2024-11-09 06:06:47,146 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 12 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:06:47,146 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:06:47,194 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 [2024-11-09 06:06:47,196 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 [2024-11-09 06:06:47,281 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 12 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:06:47,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888379080] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:06:47,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1883931028] [2024-11-09 06:06:47,283 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 06:06:47,283 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:06:47,283 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:06:47,283 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:06:47,283 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:06:47,824 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:06:49,748 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17405#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_237| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_233| Int)) (and (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_237|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_233|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_237|) (<= 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|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_233|) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|)))' at error location [2024-11-09 06:06:49,748 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:06:49,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:06:49,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 33 [2024-11-09 06:06:49,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623063030] [2024-11-09 06:06:49,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:06:49,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-09 06:06:49,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:06:49,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-09 06:06:49,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2019, Unknown=2, NotChecked=0, Total=2162 [2024-11-09 06:06:49,751 INFO L87 Difference]: Start difference. First operand 751 states and 878 transitions. Second operand has 33 states, 33 states have (on average 2.4242424242424243) internal successors, (80), 33 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:06:50,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:06:50,809 INFO L93 Difference]: Finished difference Result 1119 states and 1291 transitions. [2024-11-09 06:06:50,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-09 06:06:50,810 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.4242424242424243) internal successors, (80), 33 states have internal predecessors, (80), 0 states have call successors, (0), 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 50 [2024-11-09 06:06:50,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:06:50,813 INFO L225 Difference]: With dead ends: 1119 [2024-11-09 06:06:50,813 INFO L226 Difference]: Without dead ends: 967 [2024-11-09 06:06:50,814 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=237, Invalid=3543, Unknown=2, NotChecked=0, Total=3782 [2024-11-09 06:06:50,815 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 75 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 1121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 06:06:50,815 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 769 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1116 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 06:06:50,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2024-11-09 06:06:50,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 901. [2024-11-09 06:06:50,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 899 states have (on average 1.1735261401557286) internal successors, (1055), 900 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:06:50,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1055 transitions. [2024-11-09 06:06:50,835 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1055 transitions. Word has length 50 [2024-11-09 06:06:50,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:06:50,835 INFO L471 AbstractCegarLoop]: Abstraction has 901 states and 1055 transitions. [2024-11-09 06:06:50,835 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.4242424242424243) internal successors, (80), 33 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:06:50,836 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1055 transitions. [2024-11-09 06:06:50,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-09 06:06:50,837 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:06:50,837 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:06:50,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-09 06:06:51,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:06:51,038 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 06:06:51,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:06:51,039 INFO L85 PathProgramCache]: Analyzing trace with hash 895997473, now seen corresponding path program 8 times [2024-11-09 06:06:51,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:06:51,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689579767] [2024-11-09 06:06:51,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:06:51,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:06:51,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:06:52,026 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 10 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:06:52,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:06:52,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689579767] [2024-11-09 06:06:52,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689579767] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:06:52,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48080860] [2024-11-09 06:06:52,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:06:52,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:06:52,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:06:52,028 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:06:52,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-09 06:06:52,193 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-09 06:06:52,193 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:06:52,196 INFO L255 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-11-09 06:06:52,199 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:06:52,205 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 [2024-11-09 06:06:52,467 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 [2024-11-09 06:06:52,508 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 [2024-11-09 06:06:52,696 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 10 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:06:52,696 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:06:52,852 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:06:52,853 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 [2024-11-09 06:06:52,870 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:06:52,870 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 [2024-11-09 06:06:53,044 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 10 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:06:53,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48080860] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:06:53,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [360728770] [2024-11-09 06:06:53,045 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 06:06:53,046 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:06:53,046 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:06:53,046 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:06:53,046 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:06:53,758 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:06:55,702 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19803#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_130| Int) (|v_ULTIMATE.start_cstrcspn_#t~post2#1.base_128| Int)) (and (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_130|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post2#1.base_128|) |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_130|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post2#1.base_128|) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|)))' at error location [2024-11-09 06:06:55,702 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:06:55,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:06:55,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 17] total 33 [2024-11-09 06:06:55,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680004621] [2024-11-09 06:06:55,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:06:55,703 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-09 06:06:55,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:06:55,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-09 06:06:55,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=2117, Unknown=16, NotChecked=0, Total=2256 [2024-11-09 06:06:55,705 INFO L87 Difference]: Start difference. First operand 901 states and 1055 transitions. Second operand has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:06:56,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:06:56,828 INFO L93 Difference]: Finished difference Result 1572 states and 1812 transitions. [2024-11-09 06:06:56,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-09 06:06:56,828 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 states have internal predecessors, (80), 0 states have call successors, (0), 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 [2024-11-09 06:06:56,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:06:56,831 INFO L225 Difference]: With dead ends: 1572 [2024-11-09 06:06:56,832 INFO L226 Difference]: Without dead ends: 1074 [2024-11-09 06:06:56,833 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=200, Invalid=3565, Unknown=17, NotChecked=0, Total=3782 [2024-11-09 06:06:56,833 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 38 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 1130 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 770 SdHoareTripleChecker+Invalid, 1135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 06:06:56,833 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 770 Invalid, 1135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1130 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 06:06:56,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2024-11-09 06:06:56,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 955. [2024-11-09 06:06:56,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 953 states have (on average 1.1731374606505771) internal successors, (1118), 954 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:06:56,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 1118 transitions. [2024-11-09 06:06:56,855 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 1118 transitions. Word has length 51 [2024-11-09 06:06:56,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:06:56,856 INFO L471 AbstractCegarLoop]: Abstraction has 955 states and 1118 transitions. [2024-11-09 06:06:56,856 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:06:56,856 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 1118 transitions. [2024-11-09 06:06:56,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-09 06:06:56,858 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:06:56,858 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:06:56,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-09 06:06:57,058 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:06:57,059 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 06:06:57,059 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:06:57,059 INFO L85 PathProgramCache]: Analyzing trace with hash -341193304, now seen corresponding path program 11 times [2024-11-09 06:06:57,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:06:57,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009023637] [2024-11-09 06:06:57,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:06:57,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:06:57,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:06:57,871 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 22 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:06:57,871 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:06:57,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009023637] [2024-11-09 06:06:57,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009023637] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:06:57,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906316919] [2024-11-09 06:06:57,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:06:57,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:06:57,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:06:57,873 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:06:57,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-09 06:06:58,045 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-09 06:06:58,045 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:06:58,048 INFO L255 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-09 06:06:58,049 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:06:58,472 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 40 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:06:58,472 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:06:58,900 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 [2024-11-09 06:06:59,035 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 40 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:06:59,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906316919] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:06:59,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1101685066] [2024-11-09 06:06:59,036 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 06:06:59,036 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:06:59,036 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:06:59,036 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:06:59,037 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:06:59,567 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:07:01,364 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22731#(and (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_272| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_267| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_272|) (<= 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_267|) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_267|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_272|) (<= 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 [2024-11-09 06:07:01,365 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:07:01,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:07:01,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2024-11-09 06:07:01,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002809426] [2024-11-09 06:07:01,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:07:01,365 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-09 06:07:01,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:07:01,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-09 06:07:01,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=3334, Unknown=2, NotChecked=0, Total=3660 [2024-11-09 06:07:01,367 INFO L87 Difference]: Start difference. First operand 955 states and 1118 transitions. Second operand has 47 states, 46 states have (on average 2.9347826086956523) internal successors, (135), 47 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:07:02,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:07:02,340 INFO L93 Difference]: Finished difference Result 1110 states and 1281 transitions. [2024-11-09 06:07:02,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-09 06:07:02,340 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 2.9347826086956523) internal successors, (135), 47 states have internal predecessors, (135), 0 states have call successors, (0), 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 [2024-11-09 06:07:02,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:07:02,342 INFO L225 Difference]: With dead ends: 1110 [2024-11-09 06:07:02,342 INFO L226 Difference]: Without dead ends: 1110 [2024-11-09 06:07:02,343 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 109 SyntacticMatches, 7 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2043 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=560, Invalid=5138, Unknown=2, NotChecked=0, Total=5700 [2024-11-09 06:07:02,343 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 121 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 971 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 06:07:02,344 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 530 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 971 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 06:07:02,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2024-11-09 06:07:02,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 995. [2024-11-09 06:07:02,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 993 states have (on average 1.1752265861027191) internal successors, (1167), 994 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:07:02,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 1167 transitions. [2024-11-09 06:07:02,363 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 1167 transitions. Word has length 53 [2024-11-09 06:07:02,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:07:02,363 INFO L471 AbstractCegarLoop]: Abstraction has 995 states and 1167 transitions. [2024-11-09 06:07:02,364 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 2.9347826086956523) internal successors, (135), 47 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:07:02,364 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 1167 transitions. [2024-11-09 06:07:02,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-09 06:07:02,365 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:07:02,365 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:07:02,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-09 06:07:02,566 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:07:02,566 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 06:07:02,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:07:02,567 INFO L85 PathProgramCache]: Analyzing trace with hash -797338873, now seen corresponding path program 9 times [2024-11-09 06:07:02,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:07:02,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704112487] [2024-11-09 06:07:02,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:07:02,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:07:02,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:07:03,126 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 12 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:07:03,126 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:07:03,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704112487] [2024-11-09 06:07:03,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704112487] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:07:03,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212551055] [2024-11-09 06:07:03,127 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:07:03,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:07:03,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:07:03,128 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:07:03,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-09 06:07:03,304 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:07:03,304 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:07:03,307 INFO L255 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-11-09 06:07:03,310 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:07:03,322 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 [2024-11-09 06:07:03,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 06:07:03,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2024-11-09 06:07:03,696 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 22 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:07:03,697 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:07:04,319 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 22 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:07:04,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212551055] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:07:04,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1734864510] [2024-11-09 06:07:04,321 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 06:07:04,321 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:07:04,321 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:07:04,321 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:07:04,321 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:07:04,912 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:07:06,433 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25237#(and (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrcspn_#t~post2#1.base_143| Int) (|v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_145| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post2#1.base_143|) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post2#1.base_143|) |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_145|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_145|))) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0))' at error location [2024-11-09 06:07:06,433 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:07:06,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:07:06,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 37 [2024-11-09 06:07:06,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807322995] [2024-11-09 06:07:06,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:07:06,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-09 06:07:06,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:07:06,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-09 06:07:06,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=2501, Unknown=0, NotChecked=0, Total=2756 [2024-11-09 06:07:06,435 INFO L87 Difference]: Start difference. First operand 995 states and 1167 transitions. Second operand has 39 states, 38 states have (on average 3.473684210526316) internal successors, (132), 38 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:07:07,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:07:07,027 INFO L93 Difference]: Finished difference Result 1128 states and 1318 transitions. [2024-11-09 06:07:07,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-09 06:07:07,027 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 3.473684210526316) internal successors, (132), 38 states have internal predecessors, (132), 0 states have call successors, (0), 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 54 [2024-11-09 06:07:07,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:07:07,029 INFO L225 Difference]: With dead ends: 1128 [2024-11-09 06:07:07,029 INFO L226 Difference]: Without dead ends: 1128 [2024-11-09 06:07:07,030 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=300, Invalid=3006, Unknown=0, NotChecked=0, Total=3306 [2024-11-09 06:07:07,030 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 36 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:07:07,030 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 503 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 894 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 06:07:07,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2024-11-09 06:07:07,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 1123. [2024-11-09 06:07:07,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1123 states, 1121 states have (on average 1.175735950044603) internal successors, (1318), 1122 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:07:07,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1123 states to 1123 states and 1318 transitions. [2024-11-09 06:07:07,048 INFO L78 Accepts]: Start accepts. Automaton has 1123 states and 1318 transitions. Word has length 54 [2024-11-09 06:07:07,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:07:07,048 INFO L471 AbstractCegarLoop]: Abstraction has 1123 states and 1318 transitions. [2024-11-09 06:07:07,049 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 3.473684210526316) internal successors, (132), 38 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:07:07,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states and 1318 transitions. [2024-11-09 06:07:07,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-09 06:07:07,050 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:07:07,051 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:07:07,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-09 06:07:07,254 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-09 06:07:07,254 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)] === [2024-11-09 06:07:07,254 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:07:07,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1123647789, now seen corresponding path program 12 times [2024-11-09 06:07:07,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:07:07,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96635326] [2024-11-09 06:07:07,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:07:07,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:07:07,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:07:08,015 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 14 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:07:08,015 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:07:08,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96635326] [2024-11-09 06:07:08,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96635326] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:07:08,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011429811] [2024-11-09 06:07:08,016 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:07:08,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:07:08,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:07:08,019 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:07:08,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-09 06:07:08,160 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:07:08,160 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:07:08,162 INFO L255 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-11-09 06:07:08,164 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:07:08,404 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 [2024-11-09 06:07:08,514 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 14 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:07:08,514 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:07:08,565 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 [2024-11-09 06:07:08,567 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 [2024-11-09 06:07:08,652 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 14 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:07:08,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011429811] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:07:08,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [548596404] [2024-11-09 06:07:08,653 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 06:07:08,653 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:07:08,653 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:07:08,654 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:07:08,654 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:07:09,151 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:07:11,070 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27884#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_304| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_309| Int)) (and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_304|) (<= 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_309|) (= |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_304|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_309|) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|)))' at error location [2024-11-09 06:07:11,070 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:07:11,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:07:11,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 36 [2024-11-09 06:07:11,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74820116] [2024-11-09 06:07:11,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:07:11,071 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-09 06:07:11,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:07:11,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-09 06:07:11,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2299, Unknown=2, NotChecked=0, Total=2450 [2024-11-09 06:07:11,072 INFO L87 Difference]: Start difference. First operand 1123 states and 1318 transitions. Second operand has 36 states, 36 states have (on average 2.5) internal successors, (90), 36 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:07:12,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:07:12,351 INFO L93 Difference]: Finished difference Result 1636 states and 1897 transitions. [2024-11-09 06:07:12,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-09 06:07:12,352 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 36 states have internal predecessors, (90), 0 states have call successors, (0), 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 [2024-11-09 06:07:12,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:07:12,356 INFO L225 Difference]: With dead ends: 1636 [2024-11-09 06:07:12,356 INFO L226 Difference]: Without dead ends: 1417 [2024-11-09 06:07:12,357 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=257, Invalid=4163, Unknown=2, NotChecked=0, Total=4422 [2024-11-09 06:07:12,357 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 83 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 1384 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 1002 SdHoareTripleChecker+Invalid, 1390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 06:07:12,357 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 1002 Invalid, 1390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1384 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 06:07:12,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1417 states. [2024-11-09 06:07:12,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1417 to 1326. [2024-11-09 06:07:12,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1326 states, 1324 states have (on average 1.1774924471299093) internal successors, (1559), 1325 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:07:12,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 1559 transitions. [2024-11-09 06:07:12,382 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 1559 transitions. Word has length 57 [2024-11-09 06:07:12,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:07:12,382 INFO L471 AbstractCegarLoop]: Abstraction has 1326 states and 1559 transitions. [2024-11-09 06:07:12,382 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 36 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:07:12,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 1559 transitions. [2024-11-09 06:07:12,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-09 06:07:12,384 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:07:12,384 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:07:12,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-09 06:07:12,586 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-09 06:07:12,586 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)] === [2024-11-09 06:07:12,586 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:07:12,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1621667116, now seen corresponding path program 10 times [2024-11-09 06:07:12,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:07:12,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819858650] [2024-11-09 06:07:12,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:07:12,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:07:12,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:07:13,408 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 12 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:07:13,409 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:07:13,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819858650] [2024-11-09 06:07:13,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819858650] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:07:13,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595300587] [2024-11-09 06:07:13,409 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:07:13,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:07:13,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:07:13,411 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:07:13,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-09 06:07:13,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:07:13,587 INFO L255 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-11-09 06:07:13,589 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:07:13,599 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 [2024-11-09 06:07:13,889 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 [2024-11-09 06:07:13,924 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 [2024-11-09 06:07:14,010 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 12 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:07:14,010 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:07:14,124 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:07:14,124 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 [2024-11-09 06:07:14,131 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:07:14,131 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 [2024-11-09 06:07:14,301 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 12 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:07:14,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595300587] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:07:14,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [124784048] [2024-11-09 06:07:14,303 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 06:07:14,303 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:07:14,303 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:07:14,303 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:07:14,304 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:07:14,948 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:07:16,543 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '31282#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_162| Int) (|v_ULTIMATE.start_cstrcspn_#t~post2#1.base_160| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (or (and (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (= 0 |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_162|)) (and (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (= |ULTIMATE.start_cstrcspn_~spanp~0#1.offset| 1) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0))) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_162|) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post2#1.base_160|) |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_162|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post2#1.base_160|)))' at error location [2024-11-09 06:07:16,543 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:07:16,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:07:16,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 33 [2024-11-09 06:07:16,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756146687] [2024-11-09 06:07:16,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:07:16,544 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-09 06:07:16,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:07:16,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-09 06:07:16,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2114, Unknown=8, NotChecked=0, Total=2256 [2024-11-09 06:07:16,545 INFO L87 Difference]: Start difference. First operand 1326 states and 1559 transitions. Second operand has 34 states, 34 states have (on average 2.6470588235294117) internal successors, (90), 33 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:07:17,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:07:17,231 INFO L93 Difference]: Finished difference Result 2332 states and 2707 transitions. [2024-11-09 06:07:17,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-09 06:07:17,232 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.6470588235294117) internal successors, (90), 33 states have internal predecessors, (90), 0 states have call successors, (0), 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 60 [2024-11-09 06:07:17,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:07:17,235 INFO L225 Difference]: With dead ends: 2332 [2024-11-09 06:07:17,235 INFO L226 Difference]: Without dead ends: 1555 [2024-11-09 06:07:17,235 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=168, Invalid=2686, Unknown=8, NotChecked=0, Total=2862 [2024-11-09 06:07:17,236 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 25 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 1045 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 06:07:17,236 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 752 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1045 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 06:07:17,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2024-11-09 06:07:17,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 1387. [2024-11-09 06:07:17,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1387 states, 1385 states have (on average 1.1768953068592058) internal successors, (1630), 1386 states have internal predecessors, (1630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:07:17,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1387 states to 1387 states and 1630 transitions. [2024-11-09 06:07:17,260 INFO L78 Accepts]: Start accepts. Automaton has 1387 states and 1630 transitions. Word has length 60 [2024-11-09 06:07:17,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:07:17,260 INFO L471 AbstractCegarLoop]: Abstraction has 1387 states and 1630 transitions. [2024-11-09 06:07:17,261 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.6470588235294117) internal successors, (90), 33 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:07:17,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1387 states and 1630 transitions. [2024-11-09 06:07:17,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-09 06:07:17,263 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:07:17,263 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:07:17,284 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-09 06:07:17,467 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-09 06:07:17,467 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 06:07:17,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:07:17,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1073932849, now seen corresponding path program 13 times [2024-11-09 06:07:17,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:07:17,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312432848] [2024-11-09 06:07:17,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:07:17,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:07:17,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:07:18,315 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 35 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:07:18,315 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:07:18,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312432848] [2024-11-09 06:07:18,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312432848] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:07:18,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857124373] [2024-11-09 06:07:18,316 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:07:18,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:07:18,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:07:18,318 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:07:18,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-09 06:07:18,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:07:18,456 INFO L255 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 78 conjuncts are in the unsatisfiable core [2024-11-09 06:07:18,458 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:07:18,894 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 51 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:07:18,895 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:07:19,420 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 [2024-11-09 06:07:19,593 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 51 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:07:19,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857124373] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:07:19,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1075496964] [2024-11-09 06:07:19,594 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 06:07:19,594 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:07:19,595 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:07:19,595 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:07:19,595 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:07:20,107 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:07:22,152 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '35425#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_348| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_342| Int)) (and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_348|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_342|) (<= 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_342|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_348|) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|)))' at error location [2024-11-09 06:07:22,152 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:07:22,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:07:22,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 43 [2024-11-09 06:07:22,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071155137] [2024-11-09 06:07:22,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:07:22,153 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-09 06:07:22,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:07:22,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-09 06:07:22,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=3049, Unknown=2, NotChecked=0, Total=3306 [2024-11-09 06:07:22,155 INFO L87 Difference]: Start difference. First operand 1387 states and 1630 transitions. Second operand has 44 states, 43 states have (on average 2.9069767441860463) internal successors, (125), 44 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) [2024-11-09 06:07:23,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:07:23,453 INFO L93 Difference]: Finished difference Result 1597 states and 1850 transitions. [2024-11-09 06:07:23,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-09 06:07:23,454 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.9069767441860463) internal successors, (125), 44 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 60 [2024-11-09 06:07:23,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:07:23,457 INFO L225 Difference]: With dead ends: 1597 [2024-11-09 06:07:23,457 INFO L226 Difference]: Without dead ends: 1597 [2024-11-09 06:07:23,458 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 134 SyntacticMatches, 8 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1908 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=454, Invalid=5094, Unknown=2, NotChecked=0, Total=5550 [2024-11-09 06:07:23,458 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 225 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 1389 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 1389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 06:07:23,458 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 776 Invalid, 1389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1389 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 06:07:23,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1597 states. [2024-11-09 06:07:23,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1597 to 1435. [2024-11-09 06:07:23,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1435 states, 1433 states have (on average 1.178646196789951) internal successors, (1689), 1434 states have internal predecessors, (1689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:07:23,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1435 states to 1435 states and 1689 transitions. [2024-11-09 06:07:23,477 INFO L78 Accepts]: Start accepts. Automaton has 1435 states and 1689 transitions. Word has length 60 [2024-11-09 06:07:23,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:07:23,477 INFO L471 AbstractCegarLoop]: Abstraction has 1435 states and 1689 transitions. [2024-11-09 06:07:23,477 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.9069767441860463) internal successors, (125), 44 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) [2024-11-09 06:07:23,478 INFO L276 IsEmpty]: Start isEmpty. Operand 1435 states and 1689 transitions. [2024-11-09 06:07:23,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-09 06:07:23,479 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:07:23,479 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:07:23,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-09 06:07:23,681 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-09 06:07:23,681 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 06:07:23,681 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:07:23,681 INFO L85 PathProgramCache]: Analyzing trace with hash 298193670, now seen corresponding path program 11 times [2024-11-09 06:07:23,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:07:23,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5265577] [2024-11-09 06:07:23,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:07:23,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:07:23,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:07:24,330 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 22 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:07:24,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:07:24,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5265577] [2024-11-09 06:07:24,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5265577] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:07:24,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133035543] [2024-11-09 06:07:24,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:07:24,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:07:24,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:07:24,333 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:07:24,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-09 06:07:24,729 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-09 06:07:24,729 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:07:24,732 INFO L255 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-11-09 06:07:24,733 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:07:25,164 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 40 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:07:25,164 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:07:25,618 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 [2024-11-09 06:07:25,752 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 40 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:07:25,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133035543] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:07:25,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [75275320] [2024-11-09 06:07:25,753 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 06:07:25,753 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:07:25,753 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:07:25,754 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:07:25,754 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:07:26,330 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:07:27,934 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '38923#(and (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrcspn_#t~post2#1.base_176| Int) (|v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_179| Int)) (and (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post2#1.base_176|) (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_179|) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post2#1.base_176|) |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_179|) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|))) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0))' at error location [2024-11-09 06:07:27,934 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:07:27,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:07:27,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 44 [2024-11-09 06:07:27,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070683633] [2024-11-09 06:07:27,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:07:27,935 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-09 06:07:27,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:07:27,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-09 06:07:27,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=3220, Unknown=0, NotChecked=0, Total=3540 [2024-11-09 06:07:27,936 INFO L87 Difference]: Start difference. First operand 1435 states and 1689 transitions. Second operand has 46 states, 45 states have (on average 3.688888888888889) internal successors, (166), 45 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:07:28,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:07:28,651 INFO L93 Difference]: Finished difference Result 1603 states and 1881 transitions. [2024-11-09 06:07:28,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-09 06:07:28,651 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 3.688888888888889) internal successors, (166), 45 states have internal predecessors, (166), 0 states have call successors, (0), 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 [2024-11-09 06:07:28,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:07:28,653 INFO L225 Difference]: With dead ends: 1603 [2024-11-09 06:07:28,653 INFO L226 Difference]: Without dead ends: 1603 [2024-11-09 06:07:28,654 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 139 SyntacticMatches, 7 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1621 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=419, Invalid=4003, Unknown=0, NotChecked=0, Total=4422 [2024-11-09 06:07:28,654 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 35 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 06:07:28,654 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 546 Invalid, 1016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1016 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 06:07:28,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1603 states. [2024-11-09 06:07:28,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1603 to 1597. [2024-11-09 06:07:28,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1597 states, 1595 states have (on average 1.1793103448275861) internal successors, (1881), 1596 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:07:28,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1597 states to 1597 states and 1881 transitions. [2024-11-09 06:07:28,670 INFO L78 Accepts]: Start accepts. Automaton has 1597 states and 1881 transitions. Word has length 63 [2024-11-09 06:07:28,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:07:28,670 INFO L471 AbstractCegarLoop]: Abstraction has 1597 states and 1881 transitions. [2024-11-09 06:07:28,671 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 3.688888888888889) internal successors, (166), 45 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:07:28,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1597 states and 1881 transitions. [2024-11-09 06:07:28,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-09 06:07:28,673 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:07:28,673 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:07:28,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-11-09 06:07:28,873 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-09 06:07:28,873 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)] === [2024-11-09 06:07:28,874 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:07:28,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1424961846, now seen corresponding path program 14 times [2024-11-09 06:07:28,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:07:28,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979308103] [2024-11-09 06:07:28,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:07:28,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:07:28,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:07:29,605 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 16 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:07:29,606 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:07:29,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979308103] [2024-11-09 06:07:29,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979308103] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:07:29,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376335936] [2024-11-09 06:07:29,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:07:29,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:07:29,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:07:29,607 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:07:29,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-09 06:07:29,815 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-09 06:07:29,816 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:07:29,818 INFO L255 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 92 conjuncts are in the unsatisfiable core [2024-11-09 06:07:29,821 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:07:30,047 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 [2024-11-09 06:07:30,148 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 16 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:07:30,148 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:07:30,203 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 [2024-11-09 06:07:30,208 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 [2024-11-09 06:07:30,328 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 16 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:07:30,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376335936] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:07:30,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1137612285] [2024-11-09 06:07:30,330 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 06:07:30,330 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:07:30,330 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:07:30,330 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:07:30,330 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:07:30,886 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:07:32,861 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '42568#(and (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_383| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_389| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_383|) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_383|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_389|) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_389|) (<= 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 [2024-11-09 06:07:32,861 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:07:32,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:07:32,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 39 [2024-11-09 06:07:32,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580918867] [2024-11-09 06:07:32,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:07:32,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-09 06:07:32,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:07:32,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-09 06:07:32,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2597, Unknown=2, NotChecked=0, Total=2756 [2024-11-09 06:07:32,863 INFO L87 Difference]: Start difference. First operand 1597 states and 1881 transitions. Second operand has 39 states, 39 states have (on average 2.5384615384615383) internal successors, (99), 39 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:07:34,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:07:34,129 INFO L93 Difference]: Finished difference Result 2279 states and 2654 transitions. [2024-11-09 06:07:34,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-09 06:07:34,130 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.5384615384615383) internal successors, (99), 39 states have internal predecessors, (99), 0 states have call successors, (0), 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 64 [2024-11-09 06:07:34,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:07:34,134 INFO L225 Difference]: With dead ends: 2279 [2024-11-09 06:07:34,134 INFO L226 Difference]: Without dead ends: 1981 [2024-11-09 06:07:34,134 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=277, Invalid=4833, Unknown=2, NotChecked=0, Total=5112 [2024-11-09 06:07:34,135 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 145 mSDsluCounter, 1023 mSDsCounter, 0 mSdLazyCounter, 1586 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 1594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 06:07:34,135 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 1074 Invalid, 1594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1586 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 06:07:34,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1981 states. [2024-11-09 06:07:34,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1981 to 1861. [2024-11-09 06:07:34,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1861 states, 1859 states have (on average 1.181280258203335) internal successors, (2196), 1860 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:07:34,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1861 states to 1861 states and 2196 transitions. [2024-11-09 06:07:34,156 INFO L78 Accepts]: Start accepts. Automaton has 1861 states and 2196 transitions. Word has length 64 [2024-11-09 06:07:34,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:07:34,157 INFO L471 AbstractCegarLoop]: Abstraction has 1861 states and 2196 transitions. [2024-11-09 06:07:34,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.5384615384615383) internal successors, (99), 39 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:07:34,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1861 states and 2196 transitions. [2024-11-09 06:07:34,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-09 06:07:34,159 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:07:34,159 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:07:34,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-09 06:07:34,360 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-09 06:07:34,360 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 06:07:34,360 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:07:34,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1186094002, now seen corresponding path program 15 times [2024-11-09 06:07:34,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:07:34,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824206348] [2024-11-09 06:07:34,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:07:34,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:07:34,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:07:35,137 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 51 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:07:35,138 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:07:35,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824206348] [2024-11-09 06:07:35,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824206348] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:07:35,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198684691] [2024-11-09 06:07:35,138 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:07:35,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:07:35,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:07:35,139 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:07:35,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-09 06:07:35,280 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:07:35,280 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:07:35,282 INFO L255 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-11-09 06:07:35,284 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:07:35,659 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 70 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:07:35,659 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:07:36,169 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 [2024-11-09 06:07:36,360 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 70 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:07:36,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198684691] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:07:36,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [543602784] [2024-11-09 06:07:36,361 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 06:07:36,361 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:07:36,361 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:07:36,361 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:07:36,362 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:07:36,896 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:07:38,844 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '47204#(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_406| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_413| Int)) (and (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_406|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_413|) (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_413|) (<= 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_406|) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))))' at error location [2024-11-09 06:07:38,845 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:07:38,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:07:38,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 47 [2024-11-09 06:07:38,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316855172] [2024-11-09 06:07:38,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:07:38,845 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-09 06:07:38,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:07:38,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-09 06:07:38,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=3480, Unknown=2, NotChecked=0, Total=3782 [2024-11-09 06:07:38,846 INFO L87 Difference]: Start difference. First operand 1861 states and 2196 transitions. Second operand has 48 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 48 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) [2024-11-09 06:07:40,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:07:40,104 INFO L93 Difference]: Finished difference Result 2114 states and 2460 transitions. [2024-11-09 06:07:40,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-09 06:07:40,105 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 48 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 67 [2024-11-09 06:07:40,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:07:40,108 INFO L225 Difference]: With dead ends: 2114 [2024-11-09 06:07:40,108 INFO L226 Difference]: Without dead ends: 2114 [2024-11-09 06:07:40,108 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 152 SyntacticMatches, 9 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2301 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=532, Invalid=5946, Unknown=2, NotChecked=0, Total=6480 [2024-11-09 06:07:40,109 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 243 mSDsluCounter, 784 mSDsCounter, 0 mSdLazyCounter, 1466 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 1466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 06:07:40,109 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 831 Invalid, 1466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1466 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 06:07:40,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2114 states. [2024-11-09 06:07:40,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2114 to 1913. [2024-11-09 06:07:40,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1913 states, 1911 states have (on average 1.1826268969126112) internal successors, (2260), 1912 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:07:40,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1913 states to 1913 states and 2260 transitions. [2024-11-09 06:07:40,137 INFO L78 Accepts]: Start accepts. Automaton has 1913 states and 2260 transitions. Word has length 67 [2024-11-09 06:07:40,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:07:40,138 INFO L471 AbstractCegarLoop]: Abstraction has 1913 states and 2260 transitions. [2024-11-09 06:07:40,138 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 48 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) [2024-11-09 06:07:40,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1913 states and 2260 transitions. [2024-11-09 06:07:40,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-09 06:07:40,141 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:07:40,141 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:07:40,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-11-09 06:07:40,341 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:07:40,341 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 06:07:40,342 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:07:40,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1638855147, now seen corresponding path program 12 times [2024-11-09 06:07:40,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:07:40,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803900246] [2024-11-09 06:07:40,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:07:40,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:07:40,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:07:41,550 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 14 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:07:41,551 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:07:41,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803900246] [2024-11-09 06:07:41,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803900246] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:07:41,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20342950] [2024-11-09 06:07:41,551 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:07:41,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:07:41,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:07:41,552 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:07:41,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-09 06:07:41,753 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:07:41,753 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:07:41,756 INFO L255 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 94 conjuncts are in the unsatisfiable core [2024-11-09 06:07:41,758 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:07:42,263 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 [2024-11-09 06:07:42,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 06:07:42,321 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 [2024-11-09 06:07:45,689 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 14 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:07:45,690 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:07:45,930 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 44 treesize of output 38 [2024-11-09 06:07:46,395 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 14 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:07:46,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20342950] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:07:46,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [442382394] [2024-11-09 06:07:46,396 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 06:07:46,396 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:07:46,396 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:07:46,396 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:07:46,397 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:07:47,023 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:07:49,556 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '51750#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post2#1.base_197| Int) (|v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_200| Int)) (and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_200|) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post2#1.base_197|) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post2#1.base_197|) |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_200|)))' at error location [2024-11-09 06:07:49,556 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:07:49,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:07:49,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 21] total 58 [2024-11-09 06:07:49,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599193786] [2024-11-09 06:07:49,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:07:49,557 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-11-09 06:07:49,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:07:49,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-11-09 06:07:49,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=5033, Unknown=1, NotChecked=0, Total=5256 [2024-11-09 06:07:49,558 INFO L87 Difference]: Start difference. First operand 1913 states and 2260 transitions. Second operand has 59 states, 59 states have (on average 2.7457627118644066) internal successors, (162), 58 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:07:53,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 06:07:55,345 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] [2024-11-09 06:07:58,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:07:58,117 INFO L93 Difference]: Finished difference Result 3378 states and 3949 transitions. [2024-11-09 06:07:58,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-09 06:07:58,118 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.7457627118644066) internal successors, (162), 58 states have internal predecessors, (162), 0 states have call successors, (0), 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 [2024-11-09 06:07:58,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:07:58,123 INFO L225 Difference]: With dead ends: 3378 [2024-11-09 06:07:58,124 INFO L226 Difference]: Without dead ends: 2234 [2024-11-09 06:07:58,125 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1691 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=389, Invalid=9115, Unknown=2, NotChecked=0, Total=9506 [2024-11-09 06:07:58,125 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 52 mSDsluCounter, 1332 mSDsCounter, 0 mSdLazyCounter, 2300 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 1370 SdHoareTripleChecker+Invalid, 2308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 2300 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:07:58,125 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 1370 Invalid, 2308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 2300 Invalid, 2 Unknown, 0 Unchecked, 5.4s Time] [2024-11-09 06:07:58,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2024-11-09 06:07:58,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 1985. [2024-11-09 06:07:58,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1985 states, 1983 states have (on average 1.1820474029248613) internal successors, (2344), 1984 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:07:58,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1985 states to 1985 states and 2344 transitions. [2024-11-09 06:07:58,152 INFO L78 Accepts]: Start accepts. Automaton has 1985 states and 2344 transitions. Word has length 69 [2024-11-09 06:07:58,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:07:58,152 INFO L471 AbstractCegarLoop]: Abstraction has 1985 states and 2344 transitions. [2024-11-09 06:07:58,152 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.7457627118644066) internal successors, (162), 58 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:07:58,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1985 states and 2344 transitions. [2024-11-09 06:07:58,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-09 06:07:58,155 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:07:58,155 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:07:58,176 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-09 06:07:58,355 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:07:58,355 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 06:07:58,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:07:58,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1416103369, now seen corresponding path program 16 times [2024-11-09 06:07:58,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:07:58,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195076536] [2024-11-09 06:07:58,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:07:58,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:07:58,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:07:59,201 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 18 proven. 236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:07:59,201 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:07:59,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195076536] [2024-11-09 06:07:59,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195076536] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:07:59,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74195635] [2024-11-09 06:07:59,201 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:07:59,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:07:59,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:07:59,203 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:07:59,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-09 06:07:59,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:07:59,377 INFO L255 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 128 conjuncts are in the unsatisfiable core [2024-11-09 06:07:59,380 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:07:59,384 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 [2024-11-09 06:08:00,099 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 [2024-11-09 06:08:00,183 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 [2024-11-09 06:08:01,900 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 06:08:01,901 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 [2024-11-09 06:08:01,956 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 26 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:08:01,956 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:08:42,028 INFO L349 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2024-11-09 06:08:42,029 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 [2024-11-09 06:08:42,040 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:08:42,040 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 [2024-11-09 06:08:42,086 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:08:42,086 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 [2024-11-09 06:08:42,145 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:08:42,146 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 [2024-11-09 06:08:43,664 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 26 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:08:43,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74195635] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:08:43,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1234105461] [2024-11-09 06:08:43,665 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 06:08:43,665 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:08:43,666 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:08:43,666 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:08:43,666 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:08:44,191 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:08:48,018 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '57678#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_451| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_458| Int)) (and (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_458|) (<= 1 |#StackHeapBarrier|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_451|) (= |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|) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_451|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_458|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|)))' at error location [2024-11-09 06:08:48,018 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:08:48,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:08:48,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28, 28] total 80 [2024-11-09 06:08:48,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533093939] [2024-11-09 06:08:48,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:08:48,019 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2024-11-09 06:08:48,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:08:48,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2024-11-09 06:08:48,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=8609, Unknown=18, NotChecked=0, Total=8930 [2024-11-09 06:08:48,021 INFO L87 Difference]: Start difference. First operand 1985 states and 2344 transitions. Second operand has 81 states, 81 states have (on average 2.567901234567901) internal successors, (208), 80 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:08:56,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:08:56,191 INFO L93 Difference]: Finished difference Result 2843 states and 3313 transitions. [2024-11-09 06:08:56,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-11-09 06:08:56,192 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.567901234567901) internal successors, (208), 80 states have internal predecessors, (208), 0 states have call successors, (0), 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 [2024-11-09 06:08:56,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:08:56,196 INFO L225 Difference]: With dead ends: 2843 [2024-11-09 06:08:56,196 INFO L226 Difference]: Without dead ends: 2417 [2024-11-09 06:08:56,197 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6298 ImplicationChecksByTransitivity, 51.3s TimeCoverageRelationStatistics Valid=756, Invalid=22482, Unknown=18, NotChecked=0, Total=23256 [2024-11-09 06:08:56,197 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 170 mSDsluCounter, 2040 mSDsCounter, 0 mSdLazyCounter, 4911 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 2083 SdHoareTripleChecker+Invalid, 4928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 4911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2024-11-09 06:08:56,197 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 2083 Invalid, 4928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 4911 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2024-11-09 06:08:56,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2024-11-09 06:08:56,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 2280. [2024-11-09 06:08:56,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2280 states, 2278 states have (on average 1.1839332748024582) internal successors, (2697), 2279 states have internal predecessors, (2697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:08:56,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2280 states to 2280 states and 2697 transitions. [2024-11-09 06:08:56,217 INFO L78 Accepts]: Start accepts. Automaton has 2280 states and 2697 transitions. Word has length 71 [2024-11-09 06:08:56,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:08:56,218 INFO L471 AbstractCegarLoop]: Abstraction has 2280 states and 2697 transitions. [2024-11-09 06:08:56,218 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.567901234567901) internal successors, (208), 80 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:08:56,218 INFO L276 IsEmpty]: Start isEmpty. Operand 2280 states and 2697 transitions. [2024-11-09 06:08:56,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-09 06:08:56,220 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:08:56,220 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:08:56,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-09 06:08:56,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-11-09 06:08:56,424 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 06:08:56,424 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:08:56,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1587707567, now seen corresponding path program 13 times [2024-11-09 06:08:56,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:08:56,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109958732] [2024-11-09 06:08:56,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:08:56,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:08:56,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:08:57,285 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 35 proven. 175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:08:57,285 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:08:57,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109958732] [2024-11-09 06:08:57,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109958732] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:08:57,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633501374] [2024-11-09 06:08:57,286 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:08:57,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:08:57,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:08:57,288 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:08:57,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-09 06:08:57,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:08:57,481 INFO L255 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-11-09 06:08:57,484 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:08:58,030 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 51 proven. 159 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:08:58,030 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:08:58,666 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 [2024-11-09 06:08:58,888 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 51 proven. 159 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:08:58,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633501374] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:08:58,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2048285576] [2024-11-09 06:08:58,889 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 06:08:58,889 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:08:58,889 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:08:58,889 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:08:58,890 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:08:59,487 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:09:01,414 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '63400#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post2#1.base_215| Int) (|v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_219| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post2#1.base_215|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_219|) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (or (and (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (= 0 |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_219|)) (and (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (= |ULTIMATE.start_cstrcspn_~spanp~0#1.offset| 1) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0))) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post2#1.base_215|) |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_219|)))' at error location [2024-11-09 06:09:01,414 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:09:01,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:09:01,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 41 [2024-11-09 06:09:01,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061171080] [2024-11-09 06:09:01,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:09:01,415 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-09 06:09:01,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:09:01,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-09 06:09:01,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=2944, Unknown=0, NotChecked=0, Total=3192 [2024-11-09 06:09:01,416 INFO L87 Difference]: Start difference. First operand 2280 states and 2697 transitions. Second operand has 43 states, 42 states have (on average 3.5238095238095237) internal successors, (148), 42 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:09:02,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:09:02,541 INFO L93 Difference]: Finished difference Result 2525 states and 2981 transitions. [2024-11-09 06:09:02,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-09 06:09:02,541 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 3.5238095238095237) internal successors, (148), 42 states have internal predecessors, (148), 0 states have call successors, (0), 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 72 [2024-11-09 06:09:02,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:09:02,547 INFO L225 Difference]: With dead ends: 2525 [2024-11-09 06:09:02,547 INFO L226 Difference]: Without dead ends: 2525 [2024-11-09 06:09:02,547 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 170 SyntacticMatches, 8 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1437 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=324, Invalid=3836, Unknown=0, NotChecked=0, Total=4160 [2024-11-09 06:09:02,548 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 46 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 1316 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 770 SdHoareTripleChecker+Invalid, 1316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 06:09:02,548 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 770 Invalid, 1316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1316 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 06:09:02,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2525 states. [2024-11-09 06:09:02,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2525 to 2518. [2024-11-09 06:09:02,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2518 states, 2516 states have (on average 1.1848171701112877) internal successors, (2981), 2517 states have internal predecessors, (2981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:09:02,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2518 states to 2518 states and 2981 transitions. [2024-11-09 06:09:02,580 INFO L78 Accepts]: Start accepts. Automaton has 2518 states and 2981 transitions. Word has length 72 [2024-11-09 06:09:02,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:09:02,581 INFO L471 AbstractCegarLoop]: Abstraction has 2518 states and 2981 transitions. [2024-11-09 06:09:02,581 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 3.5238095238095237) internal successors, (148), 42 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:09:02,581 INFO L276 IsEmpty]: Start isEmpty. Operand 2518 states and 2981 transitions. [2024-11-09 06:09:02,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-09 06:09:02,583 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:09:02,583 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:09:02,606 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-09 06:09:02,787 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-11-09 06:09:02,787 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)] === [2024-11-09 06:09:02,787 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:09:02,788 INFO L85 PathProgramCache]: Analyzing trace with hash 182668347, now seen corresponding path program 17 times [2024-11-09 06:09:02,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:09:02,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015723629] [2024-11-09 06:09:02,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:09:02,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:09:02,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:09:04,050 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 70 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:09:04,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:09:04,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015723629] [2024-11-09 06:09:04,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015723629] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:09:04,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055651808] [2024-11-09 06:09:04,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:09:04,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:09:04,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:09:04,052 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:09:04,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-09 06:09:04,327 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-09 06:09:04,327 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:09:04,330 INFO L255 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-11-09 06:09:04,332 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:09:05,281 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 100 proven. 179 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:09:05,281 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:09:06,215 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 [2024-11-09 06:09:06,556 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 100 proven. 179 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:09:06,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055651808] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:09:06,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [600669517] [2024-11-09 06:09:06,558 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 06:09:06,558 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:09:06,558 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:09:06,559 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:09:06,559 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:09:07,052 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:09:09,795 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '68973#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_495| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_503| Int)) (and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_495|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_503|) (<= 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 |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_495|) (<= 2 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_503|) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|)))' at error location [2024-11-09 06:09:09,795 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:09:09,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:09:09,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 61 [2024-11-09 06:09:09,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663082793] [2024-11-09 06:09:09,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:09:09,796 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-11-09 06:09:09,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:09:09,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-11-09 06:09:09,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=549, Invalid=5149, Unknown=2, NotChecked=0, Total=5700 [2024-11-09 06:09:09,797 INFO L87 Difference]: Start difference. First operand 2518 states and 2981 transitions. Second operand has 62 states, 61 states have (on average 3.098360655737705) internal successors, (189), 62 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:09:11,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:09:11,762 INFO L93 Difference]: Finished difference Result 2840 states and 3316 transitions. [2024-11-09 06:09:11,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-09 06:09:11,763 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 3.098360655737705) internal successors, (189), 62 states have internal predecessors, (189), 0 states have call successors, (0), 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 74 [2024-11-09 06:09:11,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:09:11,769 INFO L225 Difference]: With dead ends: 2840 [2024-11-09 06:09:11,769 INFO L226 Difference]: Without dead ends: 2840 [2024-11-09 06:09:11,770 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 160 SyntacticMatches, 10 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3537 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=947, Invalid=8363, Unknown=2, NotChecked=0, Total=9312 [2024-11-09 06:09:11,770 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 239 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 1429 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 1429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-09 06:09:11,771 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 723 Invalid, 1429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1429 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-09 06:09:11,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2024-11-09 06:09:11,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2578. [2024-11-09 06:09:11,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2578 states, 2576 states have (on average 1.1859472049689441) internal successors, (3055), 2577 states have internal predecessors, (3055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:09:11,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2578 states to 2578 states and 3055 transitions. [2024-11-09 06:09:11,810 INFO L78 Accepts]: Start accepts. Automaton has 2578 states and 3055 transitions. Word has length 74 [2024-11-09 06:09:11,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:09:11,810 INFO L471 AbstractCegarLoop]: Abstraction has 2578 states and 3055 transitions. [2024-11-09 06:09:11,811 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 3.098360655737705) internal successors, (189), 62 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:09:11,811 INFO L276 IsEmpty]: Start isEmpty. Operand 2578 states and 3055 transitions. [2024-11-09 06:09:11,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-11-09 06:09:11,813 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:09:11,813 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:09:11,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-11-09 06:09:12,013 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-11-09 06:09:12,014 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)] === [2024-11-09 06:09:12,014 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:09:12,014 INFO L85 PathProgramCache]: Analyzing trace with hash 284113910, now seen corresponding path program 14 times [2024-11-09 06:09:12,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:09:12,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881097905] [2024-11-09 06:09:12,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:09:12,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:09:12,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:09:13,469 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 16 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:09:13,469 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:09:13,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881097905] [2024-11-09 06:09:13,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881097905] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:09:13,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530504555] [2024-11-09 06:09:13,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:09:13,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:09:13,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:09:13,470 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:09:13,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-09 06:09:13,729 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-09 06:09:13,729 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:09:13,732 INFO L255 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 99 conjuncts are in the unsatisfiable core [2024-11-09 06:09:13,735 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:09:13,747 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 [2024-11-09 06:09:14,271 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 [2024-11-09 06:09:14,333 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 [2024-11-09 06:09:14,487 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 16 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:09:14,487 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:09:14,587 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1197 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1197) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 7 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2024-11-09 06:09:14,593 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:09:14,594 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 [2024-11-09 06:09:14,602 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:09:14,603 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 [2024-11-09 06:09:14,843 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 16 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:09:14,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530504555] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:09:14,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [751193577] [2024-11-09 06:09:14,844 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 06:09:14,844 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:09:14,844 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:09:14,844 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:09:14,844 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:09:15,442 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:09:18,083 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '74952#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post2#1.base_234| Int) (|v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_238| Int)) (and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_238|) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post2#1.base_234|) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post2#1.base_234|) |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_238|)))' at error location [2024-11-09 06:09:18,083 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:09:18,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:09:18,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 23, 23] total 42 [2024-11-09 06:09:18,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040347194] [2024-11-09 06:09:18,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:09:18,084 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-09 06:09:18,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:09:18,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-09 06:09:18,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2943, Unknown=1, NotChecked=108, Total=3192 [2024-11-09 06:09:18,085 INFO L87 Difference]: Start difference. First operand 2578 states and 3055 transitions. Second operand has 43 states, 43 states have (on average 2.697674418604651) internal successors, (116), 42 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:09:20,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:09:20,588 INFO L93 Difference]: Finished difference Result 4586 states and 5387 transitions. [2024-11-09 06:09:20,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-09 06:09:20,588 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.697674418604651) internal successors, (116), 42 states have internal predecessors, (116), 0 states have call successors, (0), 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 78 [2024-11-09 06:09:20,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:09:20,593 INFO L225 Difference]: With dead ends: 4586 [2024-11-09 06:09:20,594 INFO L226 Difference]: Without dead ends: 2975 [2024-11-09 06:09:20,594 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=246, Invalid=5457, Unknown=1, NotChecked=148, Total=5852 [2024-11-09 06:09:20,595 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 38 mSDsluCounter, 1583 mSDsCounter, 0 mSdLazyCounter, 2350 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 1630 SdHoareTripleChecker+Invalid, 2470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-09 06:09:20,595 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 1630 Invalid, 2470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2350 Invalid, 0 Unknown, 110 Unchecked, 1.6s Time] [2024-11-09 06:09:20,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2975 states. [2024-11-09 06:09:20,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2975 to 2657. [2024-11-09 06:09:20,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2657 states, 2655 states have (on average 1.1853107344632767) internal successors, (3147), 2656 states have internal predecessors, (3147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:09:20,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2657 states to 2657 states and 3147 transitions. [2024-11-09 06:09:20,631 INFO L78 Accepts]: Start accepts. Automaton has 2657 states and 3147 transitions. Word has length 78 [2024-11-09 06:09:20,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:09:20,631 INFO L471 AbstractCegarLoop]: Abstraction has 2657 states and 3147 transitions. [2024-11-09 06:09:20,632 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.697674418604651) internal successors, (116), 42 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:09:20,632 INFO L276 IsEmpty]: Start isEmpty. Operand 2657 states and 3147 transitions. [2024-11-09 06:09:20,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-11-09 06:09:20,634 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:09:20,634 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:09:20,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-11-09 06:09:20,834 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-11-09 06:09:20,834 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)] === [2024-11-09 06:09:20,835 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:09:20,835 INFO L85 PathProgramCache]: Analyzing trace with hash 358317632, now seen corresponding path program 18 times [2024-11-09 06:09:20,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:09:20,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866511867] [2024-11-09 06:09:20,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:09:20,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:09:20,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:09:21,903 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 20 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:09:21,904 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:09:21,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866511867] [2024-11-09 06:09:21,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866511867] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:09:21,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333713605] [2024-11-09 06:09:21,904 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:09:21,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:09:21,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:09:21,906 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:09:21,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-09 06:09:22,079 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:09:22,079 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:09:22,082 INFO L255 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 110 conjuncts are in the unsatisfiable core [2024-11-09 06:09:22,085 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:09:22,498 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 [2024-11-09 06:09:22,687 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 20 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:09:22,687 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:09:22,819 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 [2024-11-09 06:09:22,825 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 [2024-11-09 06:09:23,017 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 20 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:09:23,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333713605] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:09:23,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [204550379] [2024-11-09 06:09:23,018 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 06:09:23,019 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:09:23,019 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:09:23,019 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:09:23,019 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:09:23,526 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:09:26,013 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '82756#(and (exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_552| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_544| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_552|) (<= 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_544|) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_544|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_552|) (<= 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 [2024-11-09 06:09:26,013 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:09:26,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:09:26,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 45 [2024-11-09 06:09:26,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421132722] [2024-11-09 06:09:26,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:09:26,014 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-09 06:09:26,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:09:26,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-09 06:09:26,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=3247, Unknown=2, NotChecked=0, Total=3422 [2024-11-09 06:09:26,015 INFO L87 Difference]: Start difference. First operand 2657 states and 3147 transitions. Second operand has 45 states, 45 states have (on average 2.6666666666666665) internal successors, (120), 45 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:09:28,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:09:28,515 INFO L93 Difference]: Finished difference Result 3689 states and 4323 transitions. [2024-11-09 06:09:28,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-09 06:09:28,516 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.6666666666666665) internal successors, (120), 45 states have internal predecessors, (120), 0 states have call successors, (0), 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 78 [2024-11-09 06:09:28,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:09:28,519 INFO L225 Difference]: With dead ends: 3689 [2024-11-09 06:09:28,519 INFO L226 Difference]: Without dead ends: 3197 [2024-11-09 06:09:28,520 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1547 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=317, Invalid=6323, Unknown=2, NotChecked=0, Total=6642 [2024-11-09 06:09:28,520 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 113 mSDsluCounter, 1581 mSDsCounter, 0 mSdLazyCounter, 2454 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 1642 SdHoareTripleChecker+Invalid, 2463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-09 06:09:28,520 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 1642 Invalid, 2463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2454 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-09 06:09:28,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3197 states. [2024-11-09 06:09:28,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3197 to 3025. [2024-11-09 06:09:28,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3025 states, 3023 states have (on average 1.187231227257691) internal successors, (3589), 3024 states have internal predecessors, (3589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:09:28,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3025 states to 3025 states and 3589 transitions. [2024-11-09 06:09:28,556 INFO L78 Accepts]: Start accepts. Automaton has 3025 states and 3589 transitions. Word has length 78 [2024-11-09 06:09:28,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:09:28,557 INFO L471 AbstractCegarLoop]: Abstraction has 3025 states and 3589 transitions. [2024-11-09 06:09:28,557 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.6666666666666665) internal successors, (120), 45 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:09:28,557 INFO L276 IsEmpty]: Start isEmpty. Operand 3025 states and 3589 transitions. [2024-11-09 06:09:28,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-09 06:09:28,559 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:09:28,559 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:09:28,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-11-09 06:09:28,760 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-11-09 06:09:28,760 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)] === [2024-11-09 06:09:28,760 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:09:28,760 INFO L85 PathProgramCache]: Analyzing trace with hash -260792496, now seen corresponding path program 15 times [2024-11-09 06:09:28,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:09:28,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257310014] [2024-11-09 06:09:28,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:09:28,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:09:28,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:09:29,607 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 51 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:09:29,607 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:09:29,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257310014] [2024-11-09 06:09:29,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257310014] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:09:29,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935424804] [2024-11-09 06:09:29,608 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:09:29,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:09:29,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:09:29,609 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:09:29,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-09 06:09:29,894 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:09:29,895 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:09:29,898 INFO L255 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 88 conjuncts are in the unsatisfiable core [2024-11-09 06:09:29,900 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:09:30,517 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 70 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:09:30,517 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:09:31,143 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 21 treesize of output 17 [2024-11-09 06:09:31,630 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 70 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:09:31,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935424804] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:09:31,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [470727225] [2024-11-09 06:09:31,631 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 06:09:31,631 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:09:31,631 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:09:31,631 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:09:31,631 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:09:32,353 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:09:34,752 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '90064#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post2#1.base_252| Int) (|v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_256| Int)) (and (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_256|) (<= 1 |#StackHeapBarrier|) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post2#1.base_252|) |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_256|) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post2#1.base_252|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (or (and (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (= 0 |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_256|)) (and (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (= |ULTIMATE.start_cstrcspn_~spanp~0#1.offset| 1) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0)))))' at error location [2024-11-09 06:09:34,753 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:09:34,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:09:34,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 52 [2024-11-09 06:09:34,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335288019] [2024-11-09 06:09:34,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:09:34,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-11-09 06:09:34,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:09:34,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-11-09 06:09:34,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=4147, Unknown=0, NotChecked=0, Total=4556 [2024-11-09 06:09:34,755 INFO L87 Difference]: Start difference. First operand 3025 states and 3589 transitions. Second operand has 54 states, 53 states have (on average 3.6792452830188678) internal successors, (195), 53 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:09:36,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:09:36,434 INFO L93 Difference]: Finished difference Result 3317 states and 3929 transitions. [2024-11-09 06:09:36,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-09 06:09:36,435 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 3.6792452830188678) internal successors, (195), 53 states have internal predecessors, (195), 0 states have call successors, (0), 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 [2024-11-09 06:09:36,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:09:36,439 INFO L225 Difference]: With dead ends: 3317 [2024-11-09 06:09:36,439 INFO L226 Difference]: Without dead ends: 3317 [2024-11-09 06:09:36,440 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1806 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=493, Invalid=5207, Unknown=0, NotChecked=0, Total=5700 [2024-11-09 06:09:36,440 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 44 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 1632 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 1632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:09:36,440 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 846 Invalid, 1632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1632 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-09 06:09:36,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3317 states. [2024-11-09 06:09:36,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3317 to 3309. [2024-11-09 06:09:36,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3309 states, 3307 states have (on average 1.1880858784396735) internal successors, (3929), 3308 states have internal predecessors, (3929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:09:36,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3309 states to 3309 states and 3929 transitions. [2024-11-09 06:09:36,472 INFO L78 Accepts]: Start accepts. Automaton has 3309 states and 3929 transitions. Word has length 81 [2024-11-09 06:09:36,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:09:36,472 INFO L471 AbstractCegarLoop]: Abstraction has 3309 states and 3929 transitions. [2024-11-09 06:09:36,473 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 3.6792452830188678) internal successors, (195), 53 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:09:36,473 INFO L276 IsEmpty]: Start isEmpty. Operand 3309 states and 3929 transitions. [2024-11-09 06:09:36,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-09 06:09:36,475 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:09:36,475 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:09:36,496 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-09 06:09:36,675 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:09:36,676 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)] === [2024-11-09 06:09:36,676 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:09:36,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1147887684, now seen corresponding path program 19 times [2024-11-09 06:09:36,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:09:36,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890096532] [2024-11-09 06:09:36,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:09:36,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:09:36,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:09:37,992 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 92 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:09:37,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:09:37,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890096532] [2024-11-09 06:09:37,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890096532] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:09:37,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680338220] [2024-11-09 06:09:37,993 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:09:37,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:09:37,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:09:37,994 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:09:37,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-09 06:09:38,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:09:38,180 INFO L255 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 105 conjuncts are in the unsatisfiable core [2024-11-09 06:09:38,182 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:09:38,945 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 117 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:09:38,946 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:09:40,038 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 [2024-11-09 06:09:40,436 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 117 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:09:40,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680338220] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:09:40,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [389843341] [2024-11-09 06:09:40,437 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 06:09:40,437 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:09:40,437 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:09:40,438 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:09:40,438 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:09:40,980 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:09:44,329 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '97256#(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_592| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_601| Int)) (and (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_592|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_601|) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_592|) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_601|) (<= 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 [2024-11-09 06:09:44,329 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:09:44,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:09:44,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 55 [2024-11-09 06:09:44,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24500776] [2024-11-09 06:09:44,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:09:44,330 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-11-09 06:09:44,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:09:44,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-11-09 06:09:44,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=4441, Unknown=2, NotChecked=0, Total=4830 [2024-11-09 06:09:44,331 INFO L87 Difference]: Start difference. First operand 3309 states and 3929 transitions. Second operand has 56 states, 55 states have (on average 3.036363636363636) internal successors, (167), 56 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) [2024-11-09 06:09:47,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:09:47,044 INFO L93 Difference]: Finished difference Result 3708 states and 4343 transitions. [2024-11-09 06:09:47,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-09 06:09:47,045 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 3.036363636363636) internal successors, (167), 56 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 81 [2024-11-09 06:09:47,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:09:47,048 INFO L225 Difference]: With dead ends: 3708 [2024-11-09 06:09:47,049 INFO L226 Difference]: Without dead ends: 3708 [2024-11-09 06:09:47,049 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 188 SyntacticMatches, 11 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3114 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=691, Invalid=7863, Unknown=2, NotChecked=0, Total=8556 [2024-11-09 06:09:47,050 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 299 mSDsluCounter, 1316 mSDsCounter, 0 mSdLazyCounter, 2503 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 1369 SdHoareTripleChecker+Invalid, 2503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-09 06:09:47,050 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 1369 Invalid, 2503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2503 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-09 06:09:47,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3708 states. [2024-11-09 06:09:47,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3708 to 3377. [2024-11-09 06:09:47,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3377 states, 3375 states have (on average 1.1890370370370371) internal successors, (4013), 3376 states have internal predecessors, (4013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:09:47,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3377 states to 3377 states and 4013 transitions. [2024-11-09 06:09:47,080 INFO L78 Accepts]: Start accepts. Automaton has 3377 states and 4013 transitions. Word has length 81 [2024-11-09 06:09:47,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:09:47,081 INFO L471 AbstractCegarLoop]: Abstraction has 3377 states and 4013 transitions. [2024-11-09 06:09:47,081 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 3.036363636363636) internal successors, (167), 56 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) [2024-11-09 06:09:47,081 INFO L276 IsEmpty]: Start isEmpty. Operand 3377 states and 4013 transitions. [2024-11-09 06:09:47,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-11-09 06:09:47,083 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:09:47,084 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:09:47,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-11-09 06:09:47,284 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:09:47,284 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)] === [2024-11-09 06:09:47,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:09:47,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1639634623, now seen corresponding path program 20 times [2024-11-09 06:09:47,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:09:47,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821239545] [2024-11-09 06:09:47,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:09:47,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:09:47,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:09:48,516 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 22 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:09:48,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:09:48,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821239545] [2024-11-09 06:09:48,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821239545] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:09:48,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478899861] [2024-11-09 06:09:48,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:09:48,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:09:48,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:09:48,518 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:09:48,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-09 06:09:48,846 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-11-09 06:09:48,846 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:09:48,850 INFO L255 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 122 conjuncts are in the unsatisfiable core [2024-11-09 06:09:48,852 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:09:49,306 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 [2024-11-09 06:09:49,531 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 22 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:09:49,531 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:09:49,648 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 [2024-11-09 06:09:49,650 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 [2024-11-09 06:09:49,795 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 22 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:09:49,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478899861] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:09:49,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1085688663] [2024-11-09 06:09:49,796 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 06:09:49,796 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:09:49,796 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:09:49,797 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:09:49,797 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:09:50,296 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:09:53,212 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '104953#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_631| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_622| 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_622|) (= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_622|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_631|) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_631|) (<= 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 [2024-11-09 06:09:53,212 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:09:53,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:09:53,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 48 [2024-11-09 06:09:53,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328762407] [2024-11-09 06:09:53,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:09:53,213 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-09 06:09:53,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:09:53,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-09 06:09:53,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=3599, Unknown=2, NotChecked=0, Total=3782 [2024-11-09 06:09:53,214 INFO L87 Difference]: Start difference. First operand 3377 states and 4013 transitions. Second operand has 48 states, 48 states have (on average 2.6875) internal successors, (129), 48 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:09:56,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:09:56,037 INFO L93 Difference]: Finished difference Result 4570 states and 5375 transitions. [2024-11-09 06:09:56,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-09 06:09:56,038 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.6875) internal successors, (129), 48 states have internal predecessors, (129), 0 states have call successors, (0), 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 [2024-11-09 06:09:56,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:09:56,043 INFO L225 Difference]: With dead ends: 4570 [2024-11-09 06:09:56,043 INFO L226 Difference]: Without dead ends: 4032 [2024-11-09 06:09:56,045 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1734 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=337, Invalid=7143, Unknown=2, NotChecked=0, Total=7482 [2024-11-09 06:09:56,045 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 128 mSDsluCounter, 2253 mSDsCounter, 0 mSdLazyCounter, 3290 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 2319 SdHoareTripleChecker+Invalid, 3301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 3290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-09 06:09:56,045 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 2319 Invalid, 3301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 3290 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-09 06:09:56,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4032 states. [2024-11-09 06:09:56,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4032 to 3823. [2024-11-09 06:09:56,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3823 states, 3821 states have (on average 1.1910494634912328) internal successors, (4551), 3822 states have internal predecessors, (4551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:09:56,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3823 states to 3823 states and 4551 transitions. [2024-11-09 06:09:56,093 INFO L78 Accepts]: Start accepts. Automaton has 3823 states and 4551 transitions. Word has length 85 [2024-11-09 06:09:56,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:09:56,094 INFO L471 AbstractCegarLoop]: Abstraction has 3823 states and 4551 transitions. [2024-11-09 06:09:56,094 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.6875) internal successors, (129), 48 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:09:56,094 INFO L276 IsEmpty]: Start isEmpty. Operand 3823 states and 4551 transitions. [2024-11-09 06:09:56,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-09 06:09:56,097 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:09:56,097 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:09:56,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-11-09 06:09:56,297 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-11-09 06:09:56,297 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)] === [2024-11-09 06:09:56,298 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:09:56,298 INFO L85 PathProgramCache]: Analyzing trace with hash 953261749, now seen corresponding path program 16 times [2024-11-09 06:09:56,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:09:56,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18965291] [2024-11-09 06:09:56,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:09:56,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:09:56,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:09:57,526 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 18 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:09:57,526 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:09:57,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18965291] [2024-11-09 06:09:57,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18965291] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:09:57,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862167389] [2024-11-09 06:09:57,526 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:09:57,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:09:57,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:09:57,527 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:09:57,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-09 06:09:57,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:09:57,743 INFO L255 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 109 conjuncts are in the unsatisfiable core [2024-11-09 06:09:57,746 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:09:57,750 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 [2024-11-09 06:09:58,272 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 [2024-11-09 06:09:58,325 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 [2024-11-09 06:09:58,471 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 18 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:09:58,471 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:09:58,575 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1463 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1463) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)))) is different from false [2024-11-09 06:09:58,582 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:09:58,583 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 [2024-11-09 06:09:58,591 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:09:58,591 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 [2024-11-09 06:09:58,821 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 18 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:09:58,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862167389] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:09:58,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [495199943] [2024-11-09 06:09:58,822 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 06:09:58,822 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:09:58,822 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:09:58,822 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:09:58,823 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:09:59,690 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:10:01,930 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '113969#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post2#1.base_275| Int) (|v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_279| Int)) (and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post2#1.base_275|) |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_279|) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post2#1.base_275|) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_279|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|)))' at error location [2024-11-09 06:10:01,930 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:10:01,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:10:01,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 42 [2024-11-09 06:10:01,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768078723] [2024-11-09 06:10:01,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:10:01,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-09 06:10:01,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:10:01,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-09 06:10:01,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2928, Unknown=1, NotChecked=108, Total=3192 [2024-11-09 06:10:01,932 INFO L87 Difference]: Start difference. First operand 3823 states and 4551 transitions. Second operand has 43 states, 43 states have (on average 2.9302325581395348) internal successors, (126), 42 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:10:03,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:10:03,698 INFO L93 Difference]: Finished difference Result 6914 states and 8172 transitions. [2024-11-09 06:10:03,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-09 06:10:03,699 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.9302325581395348) internal successors, (126), 42 states have internal predecessors, (126), 0 states have call successors, (0), 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 [2024-11-09 06:10:03,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:10:03,704 INFO L225 Difference]: With dead ends: 6914 [2024-11-09 06:10:03,704 INFO L226 Difference]: Without dead ends: 4307 [2024-11-09 06:10:03,705 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 230 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=204, Invalid=3959, Unknown=1, NotChecked=126, Total=4290 [2024-11-09 06:10:03,707 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 36 mSDsluCounter, 1526 mSDsCounter, 0 mSdLazyCounter, 2185 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 1578 SdHoareTripleChecker+Invalid, 2315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 2185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:10:03,707 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 1578 Invalid, 2315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 2185 Invalid, 0 Unknown, 122 Unchecked, 1.3s Time] [2024-11-09 06:10:03,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4307 states. [2024-11-09 06:10:03,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4307 to 3912. [2024-11-09 06:10:03,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3912 states, 3910 states have (on average 1.1902813299232737) internal successors, (4654), 3911 states have internal predecessors, (4654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:10:03,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3912 states to 3912 states and 4654 transitions. [2024-11-09 06:10:03,756 INFO L78 Accepts]: Start accepts. Automaton has 3912 states and 4654 transitions. Word has length 87 [2024-11-09 06:10:03,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:10:03,757 INFO L471 AbstractCegarLoop]: Abstraction has 3912 states and 4654 transitions. [2024-11-09 06:10:03,757 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.9302325581395348) internal successors, (126), 42 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:10:03,757 INFO L276 IsEmpty]: Start isEmpty. Operand 3912 states and 4654 transitions. [2024-11-09 06:10:03,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-09 06:10:03,760 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:10:03,760 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:10:03,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-09 06:10:03,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2024-11-09 06:10:03,960 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 06:10:03,961 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:10:03,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1916361659, now seen corresponding path program 21 times [2024-11-09 06:10:03,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:10:03,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272979450] [2024-11-09 06:10:03,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:10:03,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:10:03,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:10:05,003 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 117 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:10:05,003 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:10:05,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272979450] [2024-11-09 06:10:05,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272979450] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:10:05,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723368035] [2024-11-09 06:10:05,003 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:10:05,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:10:05,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:10:05,005 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:10:05,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-09 06:10:05,204 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:10:05,204 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:10:05,207 INFO L255 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 112 conjuncts are in the unsatisfiable core [2024-11-09 06:10:05,208 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:10:05,970 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 145 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:10:05,971 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:10:06,905 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 [2024-11-09 06:10:07,308 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 145 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:10:07,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723368035] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:10:07,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [941004372] [2024-11-09 06:10:07,310 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 06:10:07,310 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:10:07,310 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:10:07,310 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:10:07,310 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:10:07,830 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:10:10,928 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '125410#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_684| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_674| Int)) (and (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_684|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_674|) (<= 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_674|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_684|) (<= 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 [2024-11-09 06:10:10,928 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:10:10,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:10:10,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 59 [2024-11-09 06:10:10,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297094017] [2024-11-09 06:10:10,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:10:10,929 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-11-09 06:10:10,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:10:10,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-11-09 06:10:10,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=4956, Unknown=2, NotChecked=0, Total=5402 [2024-11-09 06:10:10,930 INFO L87 Difference]: Start difference. First operand 3912 states and 4654 transitions. Second operand has 60 states, 59 states have (on average 3.0677966101694913) internal successors, (181), 60 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) [2024-11-09 06:10:13,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:10:13,548 INFO L93 Difference]: Finished difference Result 4370 states and 5128 transitions. [2024-11-09 06:10:13,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-09 06:10:13,548 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 3.0677966101694913) internal successors, (181), 60 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 88 [2024-11-09 06:10:13,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:10:13,553 INFO L225 Difference]: With dead ends: 4370 [2024-11-09 06:10:13,553 INFO L226 Difference]: Without dead ends: 4370 [2024-11-09 06:10:13,554 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 206 SyntacticMatches, 12 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3615 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=787, Invalid=8913, Unknown=2, NotChecked=0, Total=9702 [2024-11-09 06:10:13,554 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 380 mSDsluCounter, 1273 mSDsCounter, 0 mSdLazyCounter, 2341 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 1332 SdHoareTripleChecker+Invalid, 2341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-09 06:10:13,554 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 1332 Invalid, 2341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2341 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-09 06:10:13,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4370 states. [2024-11-09 06:10:13,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4370 to 3984. [2024-11-09 06:10:13,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3984 states, 3982 states have (on average 1.1911099949773982) internal successors, (4743), 3983 states have internal predecessors, (4743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:10:13,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3984 states to 3984 states and 4743 transitions. [2024-11-09 06:10:13,611 INFO L78 Accepts]: Start accepts. Automaton has 3984 states and 4743 transitions. Word has length 88 [2024-11-09 06:10:13,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:10:13,612 INFO L471 AbstractCegarLoop]: Abstraction has 3984 states and 4743 transitions. [2024-11-09 06:10:13,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 3.0677966101694913) internal successors, (181), 60 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) [2024-11-09 06:10:13,612 INFO L276 IsEmpty]: Start isEmpty. Operand 3984 states and 4743 transitions. [2024-11-09 06:10:13,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-09 06:10:13,615 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:10:13,615 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:10:13,636 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-11-09 06:10:13,815 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:10:13,816 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 06:10:13,816 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:10:13,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1199399067, now seen corresponding path program 17 times [2024-11-09 06:10:13,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:10:13,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322366647] [2024-11-09 06:10:13,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:10:13,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:10:13,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:10:14,688 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 70 proven. 281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:10:14,688 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:10:14,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322366647] [2024-11-09 06:10:14,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322366647] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:10:14,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453381250] [2024-11-09 06:10:14,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:10:14,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:10:14,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:10:14,690 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:10:14,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-09 06:10:14,998 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-09 06:10:14,998 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:10:15,002 INFO L255 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 78 conjuncts are in the unsatisfiable core [2024-11-09 06:10:15,004 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:10:15,970 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 100 proven. 251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:10:15,970 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:10:16,878 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 [2024-11-09 06:10:17,179 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 100 proven. 251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:10:17,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453381250] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:10:17,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [398557961] [2024-11-09 06:10:17,180 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 06:10:17,180 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:10:17,180 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:10:17,180 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:10:17,180 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:10:17,843 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:10:20,308 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '134423#(and (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrcspn_#t~post2#1.base_294| Int) (|v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_299| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post2#1.base_294|) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post2#1.base_294|) |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_299|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_299|))))' at error location [2024-11-09 06:10:20,309 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:10:20,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:10:20,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 59 [2024-11-09 06:10:20,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603743260] [2024-11-09 06:10:20,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:10:20,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-11-09 06:10:20,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:10:20,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-11-09 06:10:20,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=542, Invalid=5008, Unknown=0, NotChecked=0, Total=5550 [2024-11-09 06:10:20,310 INFO L87 Difference]: Start difference. First operand 3984 states and 4743 transitions. Second operand has 61 states, 60 states have (on average 3.966666666666667) internal successors, (238), 60 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:10:22,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:10:22,024 INFO L93 Difference]: Finished difference Result 4331 states and 5149 transitions. [2024-11-09 06:10:22,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-09 06:10:22,025 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 3.966666666666667) internal successors, (238), 60 states have internal predecessors, (238), 0 states have call successors, (0), 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 90 [2024-11-09 06:10:22,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:10:22,028 INFO L225 Difference]: With dead ends: 4331 [2024-11-09 06:10:22,028 INFO L226 Difference]: Without dead ends: 4331 [2024-11-09 06:10:22,028 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 208 SyntacticMatches, 10 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2839 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=716, Invalid=6424, Unknown=0, NotChecked=0, Total=7140 [2024-11-09 06:10:22,029 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 57 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 1592 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 1592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:10:22,029 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 834 Invalid, 1592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1592 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-09 06:10:22,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4331 states. [2024-11-09 06:10:22,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4331 to 4322. [2024-11-09 06:10:22,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4322 states, 4320 states have (on average 1.191898148148148) internal successors, (5149), 4321 states have internal predecessors, (5149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:10:22,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4322 states to 4322 states and 5149 transitions. [2024-11-09 06:10:22,071 INFO L78 Accepts]: Start accepts. Automaton has 4322 states and 5149 transitions. Word has length 90 [2024-11-09 06:10:22,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:10:22,071 INFO L471 AbstractCegarLoop]: Abstraction has 4322 states and 5149 transitions. [2024-11-09 06:10:22,071 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 3.966666666666667) internal successors, (238), 60 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:10:22,072 INFO L276 IsEmpty]: Start isEmpty. Operand 4322 states and 5149 transitions. [2024-11-09 06:10:22,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-11-09 06:10:22,075 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:10:22,075 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:10:22,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-11-09 06:10:22,275 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:10:22,276 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)] === [2024-11-09 06:10:22,276 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:10:22,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1197457738, now seen corresponding path program 22 times [2024-11-09 06:10:22,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:10:22,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826670975] [2024-11-09 06:10:22,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:10:22,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:10:22,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:10:23,565 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 24 proven. 440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:10:23,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:10:23,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826670975] [2024-11-09 06:10:23,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826670975] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:10:23,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860968361] [2024-11-09 06:10:23,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:10:23,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:10:23,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:10:23,568 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:10:23,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-09 06:10:23,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:10:23,800 INFO L255 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 132 conjuncts are in the unsatisfiable core [2024-11-09 06:10:23,802 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:10:24,385 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 [2024-11-09 06:10:24,581 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 24 proven. 440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:10:24,582 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:10:24,689 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 [2024-11-09 06:10:24,693 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 [2024-11-09 06:10:24,869 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 24 proven. 440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:10:24,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860968361] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:10:24,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2087744504] [2024-11-09 06:10:24,870 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 06:10:24,870 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:10:24,871 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:10:24,871 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:10:24,871 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:10:25,490 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:10:28,652 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '143707#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_729| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_739| Int)) (and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_739|) (<= 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_729|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_739|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_729|) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|)))' at error location [2024-11-09 06:10:28,652 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:10:28,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:10:28,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 51 [2024-11-09 06:10:28,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057135385] [2024-11-09 06:10:28,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:10:28,653 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-09 06:10:28,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:10:28,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-09 06:10:28,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=3969, Unknown=2, NotChecked=0, Total=4160 [2024-11-09 06:10:28,654 INFO L87 Difference]: Start difference. First operand 4322 states and 5149 transitions. Second operand has 51 states, 51 states have (on average 2.7450980392156863) internal successors, (140), 51 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) [2024-11-09 06:10:32,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:10:32,188 INFO L93 Difference]: Finished difference Result 5768 states and 6803 transitions. [2024-11-09 06:10:32,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-09 06:10:32,189 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.7450980392156863) internal successors, (140), 51 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) Word has length 92 [2024-11-09 06:10:32,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:10:32,192 INFO L225 Difference]: With dead ends: 5768 [2024-11-09 06:10:32,192 INFO L226 Difference]: Without dead ends: 5109 [2024-11-09 06:10:32,193 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1932 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=357, Invalid=8013, Unknown=2, NotChecked=0, Total=8372 [2024-11-09 06:10:32,193 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 136 mSDsluCounter, 2354 mSDsCounter, 0 mSdLazyCounter, 3434 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 2425 SdHoareTripleChecker+Invalid, 3445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 3434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:10:32,193 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 2425 Invalid, 3445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 3434 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-09 06:10:32,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5109 states. [2024-11-09 06:10:32,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5109 to 4857. [2024-11-09 06:10:32,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4857 states, 4855 states have (on average 1.1938208032955715) internal successors, (5796), 4856 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:10:32,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4857 states to 4857 states and 5796 transitions. [2024-11-09 06:10:32,239 INFO L78 Accepts]: Start accepts. Automaton has 4857 states and 5796 transitions. Word has length 92 [2024-11-09 06:10:32,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:10:32,239 INFO L471 AbstractCegarLoop]: Abstraction has 4857 states and 5796 transitions. [2024-11-09 06:10:32,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.7450980392156863) internal successors, (140), 51 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) [2024-11-09 06:10:32,239 INFO L276 IsEmpty]: Start isEmpty. Operand 4857 states and 5796 transitions. [2024-11-09 06:10:32,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-11-09 06:10:32,241 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:10:32,241 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:10:32,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-11-09 06:10:32,442 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:10:32,442 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 06:10:32,442 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:10:32,442 INFO L85 PathProgramCache]: Analyzing trace with hash -455960122, now seen corresponding path program 23 times [2024-11-09 06:10:32,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:10:32,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391637412] [2024-11-09 06:10:32,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:10:32,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:10:32,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:10:33,988 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 145 proven. 353 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:10:33,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:10:33,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391637412] [2024-11-09 06:10:33,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391637412] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:10:33,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981562646] [2024-11-09 06:10:33,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:10:33,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:10:33,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:10:33,990 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:10:33,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-09 06:10:34,499 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-11-09 06:10:34,499 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:10:34,504 INFO L255 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 101 conjuncts are in the unsatisfiable core [2024-11-09 06:10:34,506 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:10:36,318 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 187 proven. 311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:10:36,318 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:10:37,804 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 [2024-11-09 06:10:38,370 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 187 proven. 311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:10:38,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981562646] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:10:38,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [546612802] [2024-11-09 06:10:38,371 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 06:10:38,371 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:10:38,371 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:10:38,372 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:10:38,372 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:10:38,855 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:10:41,956 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '155041#(and (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_771| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_760| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_760|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_771|) (<= 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|) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_760|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_771|) (<= 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 [2024-11-09 06:10:41,956 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:10:41,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:10:41,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 76 [2024-11-09 06:10:41,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272834546] [2024-11-09 06:10:41,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:10:41,957 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2024-11-09 06:10:41,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:10:41,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2024-11-09 06:10:41,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=851, Invalid=7337, Unknown=2, NotChecked=0, Total=8190 [2024-11-09 06:10:41,958 INFO L87 Difference]: Start difference. First operand 4857 states and 5796 transitions. Second operand has 77 states, 76 states have (on average 3.1973684210526314) internal successors, (243), 77 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) [2024-11-09 06:10:44,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:10:44,630 INFO L93 Difference]: Finished difference Result 5378 states and 6334 transitions. [2024-11-09 06:10:44,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-09 06:10:44,631 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 3.1973684210526314) internal successors, (243), 77 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 95 [2024-11-09 06:10:44,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:10:44,635 INFO L225 Difference]: With dead ends: 5378 [2024-11-09 06:10:44,635 INFO L226 Difference]: Without dead ends: 5378 [2024-11-09 06:10:44,636 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 211 SyntacticMatches, 13 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5457 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=1447, Invalid=12357, Unknown=2, NotChecked=0, Total=13806 [2024-11-09 06:10:44,636 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 232 mSDsluCounter, 1059 mSDsCounter, 0 mSdLazyCounter, 1793 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 1122 SdHoareTripleChecker+Invalid, 1793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:10:44,636 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 1122 Invalid, 1793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1793 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-09 06:10:44,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5378 states. [2024-11-09 06:10:44,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5378 to 4933. [2024-11-09 06:10:44,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4933 states, 4931 states have (on average 1.194483877509633) internal successors, (5890), 4932 states have internal predecessors, (5890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:10:44,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4933 states to 4933 states and 5890 transitions. [2024-11-09 06:10:44,691 INFO L78 Accepts]: Start accepts. Automaton has 4933 states and 5890 transitions. Word has length 95 [2024-11-09 06:10:44,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:10:44,691 INFO L471 AbstractCegarLoop]: Abstraction has 4933 states and 5890 transitions. [2024-11-09 06:10:44,692 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 3.1973684210526314) internal successors, (243), 77 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) [2024-11-09 06:10:44,692 INFO L276 IsEmpty]: Start isEmpty. Operand 4933 states and 5890 transitions. [2024-11-09 06:10:44,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-11-09 06:10:44,694 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:10:44,695 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:10:44,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2024-11-09 06:10:44,895 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:10:44,895 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 06:10:44,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:10:44,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1006173120, now seen corresponding path program 18 times [2024-11-09 06:10:44,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:10:44,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019819931] [2024-11-09 06:10:44,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:10:44,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:10:44,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:10:46,559 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 20 proven. 387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:10:46,559 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:10:46,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019819931] [2024-11-09 06:10:46,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019819931] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:10:46,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429578393] [2024-11-09 06:10:46,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:10:46,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:10:46,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:10:46,561 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:10:46,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-09 06:10:46,968 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:10:46,968 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:10:46,974 INFO L255 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 136 conjuncts are in the unsatisfiable core [2024-11-09 06:10:46,981 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:10:47,875 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 [2024-11-09 06:10:47,981 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 06:10:47,981 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 [2024-11-09 06:10:50,276 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 20 proven. 387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:10:50,276 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:10:51,055 WARN L851 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int) (v_ArrVal_1755 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1755) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 (+ 9 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (not (= 0 (select v_ArrVal_1755 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|)))))) is different from false [2024-11-09 06:10:51,065 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:10:51,065 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 [2024-11-09 06:10:51,085 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:10:51,086 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 [2024-11-09 06:10:51,113 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:10:51,114 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 [2024-11-09 06:10:52,967 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 26 proven. 381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:10:52,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429578393] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:10:52,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1889729255] [2024-11-09 06:10:52,968 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 06:10:52,968 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:10:52,968 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:10:52,969 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:10:52,969 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:10:53,781 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:10:57,821 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '166067#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_324| Int) (|v_ULTIMATE.start_cstrcspn_#t~post2#1.base_319| Int)) (and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_324|) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post2#1.base_319|) |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_324|) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post2#1.base_319|) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|)))' at error location [2024-11-09 06:10:57,821 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:10:57,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:10:57,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 32, 32] total 76 [2024-11-09 06:10:57,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469531244] [2024-11-09 06:10:57,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:10:57,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2024-11-09 06:10:57,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:10:57,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2024-11-09 06:10:57,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=7747, Unknown=1, NotChecked=176, Total=8190 [2024-11-09 06:10:57,824 INFO L87 Difference]: Start difference. First operand 4933 states and 5890 transitions. Second operand has 77 states, 77 states have (on average 2.935064935064935) internal successors, (226), 76 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) [2024-11-09 06:11:03,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:11:03,371 INFO L93 Difference]: Finished difference Result 12071 states and 14373 transitions. [2024-11-09 06:11:03,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-11-09 06:11:03,371 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.935064935064935) internal successors, (226), 76 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 96 [2024-11-09 06:11:03,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:11:03,375 INFO L225 Difference]: With dead ends: 12071 [2024-11-09 06:11:03,375 INFO L226 Difference]: Without dead ends: 6013 [2024-11-09 06:11:03,376 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2074 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=451, Invalid=13124, Unknown=1, NotChecked=230, Total=13806 [2024-11-09 06:11:03,376 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 85 mSDsluCounter, 2455 mSDsCounter, 0 mSdLazyCounter, 4121 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 2508 SdHoareTripleChecker+Invalid, 4424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 4121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 292 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:11:03,377 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 2508 Invalid, 4424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 4121 Invalid, 0 Unknown, 292 Unchecked, 3.3s Time] [2024-11-09 06:11:03,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6013 states. [2024-11-09 06:11:03,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6013 to 5033. [2024-11-09 06:11:03,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5033 states, 5031 states have (on average 1.193798449612403) internal successors, (6006), 5032 states have internal predecessors, (6006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:11:03,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5033 states to 5033 states and 6006 transitions. [2024-11-09 06:11:03,421 INFO L78 Accepts]: Start accepts. Automaton has 5033 states and 6006 transitions. Word has length 96 [2024-11-09 06:11:03,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:11:03,422 INFO L471 AbstractCegarLoop]: Abstraction has 5033 states and 6006 transitions. [2024-11-09 06:11:03,422 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.935064935064935) internal successors, (226), 76 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) [2024-11-09 06:11:03,422 INFO L276 IsEmpty]: Start isEmpty. Operand 5033 states and 6006 transitions. [2024-11-09 06:11:03,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-11-09 06:11:03,424 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:11:03,424 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:11:03,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2024-11-09 06:11:03,625 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2024-11-09 06:11:03,625 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)] === [2024-11-09 06:11:03,625 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:11:03,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1441922202, now seen corresponding path program 19 times [2024-11-09 06:11:03,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:11:03,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493740220] [2024-11-09 06:11:03,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:11:03,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:11:03,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:11:04,879 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 92 proven. 343 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:11:04,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:11:04,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493740220] [2024-11-09 06:11:04,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493740220] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:11:04,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157247358] [2024-11-09 06:11:04,880 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:11:04,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:11:04,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:11:04,881 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:11:04,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-09 06:11:05,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:11:05,147 INFO L255 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 103 conjuncts are in the unsatisfiable core [2024-11-09 06:11:05,149 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:11:06,012 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 117 proven. 318 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:11:06,012 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:11:06,963 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 [2024-11-09 06:11:07,375 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 117 proven. 318 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:11:07,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157247358] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:11:07,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1715230647] [2024-11-09 06:11:07,377 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 06:11:07,377 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:11:07,377 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:11:07,377 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:11:07,377 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:11:08,209 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:11:10,741 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '183882#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_342| Int) (|v_ULTIMATE.start_cstrcspn_#t~post2#1.base_336| Int)) (and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post2#1.base_336|) |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_342|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_342|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post2#1.base_336|)))' at error location [2024-11-09 06:11:10,741 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:11:10,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:11:10,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 53 [2024-11-09 06:11:10,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166544932] [2024-11-09 06:11:10,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:11:10,742 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-11-09 06:11:10,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:11:10,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-11-09 06:11:10,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=4313, Unknown=0, NotChecked=0, Total=4692 [2024-11-09 06:11:10,743 INFO L87 Difference]: Start difference. First operand 5033 states and 6006 transitions. Second operand has 55 states, 54 states have (on average 3.740740740740741) internal successors, (202), 54 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:11:12,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:11:12,938 INFO L93 Difference]: Finished difference Result 5435 states and 6478 transitions. [2024-11-09 06:11:12,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-09 06:11:12,939 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 3.740740740740741) internal successors, (202), 54 states have internal predecessors, (202), 0 states have call successors, (0), 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 [2024-11-09 06:11:12,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:11:12,943 INFO L225 Difference]: With dead ends: 5435 [2024-11-09 06:11:12,943 INFO L226 Difference]: Without dead ends: 5435 [2024-11-09 06:11:12,944 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 242 SyntacticMatches, 11 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2395 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=500, Invalid=5820, Unknown=0, NotChecked=0, Total=6320 [2024-11-09 06:11:12,944 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 80 mSDsluCounter, 1112 mSDsCounter, 0 mSdLazyCounter, 2223 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 1162 SdHoareTripleChecker+Invalid, 2223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-09 06:11:12,944 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 1162 Invalid, 2223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2223 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-09 06:11:12,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5435 states. [2024-11-09 06:11:13,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5435 to 5425. [2024-11-09 06:11:13,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5425 states, 5423 states have (on average 1.19454176654988) internal successors, (6478), 5424 states have internal predecessors, (6478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:11:13,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5425 states to 5425 states and 6478 transitions. [2024-11-09 06:11:13,014 INFO L78 Accepts]: Start accepts. Automaton has 5425 states and 6478 transitions. Word has length 99 [2024-11-09 06:11:13,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:11:13,014 INFO L471 AbstractCegarLoop]: Abstraction has 5425 states and 6478 transitions. [2024-11-09 06:11:13,014 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 3.740740740740741) internal successors, (202), 54 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:11:13,014 INFO L276 IsEmpty]: Start isEmpty. Operand 5425 states and 6478 transitions. [2024-11-09 06:11:13,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-11-09 06:11:13,017 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:11:13,017 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:11:13,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2024-11-09 06:11:13,217 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2024-11-09 06:11:13,218 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)] === [2024-11-09 06:11:13,218 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:11:13,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1534914997, now seen corresponding path program 24 times [2024-11-09 06:11:13,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:11:13,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738662966] [2024-11-09 06:11:13,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:11:13,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:11:13,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:11:14,684 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 26 proven. 522 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:11:14,684 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:11:14,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738662966] [2024-11-09 06:11:14,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738662966] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:11:14,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555566107] [2024-11-09 06:11:14,684 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:11:14,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:11:14,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:11:14,686 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:11:14,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-09 06:11:14,930 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:11:14,930 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:11:14,934 INFO L255 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 140 conjuncts are in the unsatisfiable core [2024-11-09 06:11:14,936 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:11:15,591 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 [2024-11-09 06:11:15,826 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 26 proven. 522 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:11:15,826 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:11:15,953 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 [2024-11-09 06:11:15,957 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 [2024-11-09 06:11:16,170 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 26 proven. 522 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:11:16,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555566107] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:11:16,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2095256681] [2024-11-09 06:11:16,171 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 06:11:16,171 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:11:16,172 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:11:16,172 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:11:16,172 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:11:16,744 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:11:20,056 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '195420#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post4#1.base_845| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_856| Int)) (and (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_845|) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_845|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_856|) (<= 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) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_856|) (<= 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 [2024-11-09 06:11:20,057 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:11:20,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:11:20,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 54 [2024-11-09 06:11:20,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959036150] [2024-11-09 06:11:20,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:11:20,058 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-11-09 06:11:20,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:11:20,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-11-09 06:11:20,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=4357, Unknown=2, NotChecked=0, Total=4556 [2024-11-09 06:11:20,059 INFO L87 Difference]: Start difference. First operand 5425 states and 6478 transitions. Second operand has 54 states, 54 states have (on average 2.7777777777777777) internal successors, (150), 54 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) [2024-11-09 06:11:24,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:11:24,165 INFO L93 Difference]: Finished difference Result 7148 states and 8452 transitions. [2024-11-09 06:11:24,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-09 06:11:24,166 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.7777777777777777) internal successors, (150), 54 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 99 [2024-11-09 06:11:24,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:11:24,170 INFO L225 Difference]: With dead ends: 7148 [2024-11-09 06:11:24,170 INFO L226 Difference]: Without dead ends: 6356 [2024-11-09 06:11:24,171 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2141 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=377, Invalid=8933, Unknown=2, NotChecked=0, Total=9312 [2024-11-09 06:11:24,171 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 150 mSDsluCounter, 2130 mSDsCounter, 0 mSdLazyCounter, 3445 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 2206 SdHoareTripleChecker+Invalid, 3457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 3445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:11:24,172 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 2206 Invalid, 3457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 3445 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-09 06:11:24,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6356 states. [2024-11-09 06:11:24,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6356 to 6057. [2024-11-09 06:11:24,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6057 states, 6055 states have (on average 1.1963666391412056) internal successors, (7244), 6056 states have internal predecessors, (7244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:11:24,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6057 states to 6057 states and 7244 transitions. [2024-11-09 06:11:24,223 INFO L78 Accepts]: Start accepts. Automaton has 6057 states and 7244 transitions. Word has length 99 [2024-11-09 06:11:24,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:11:24,223 INFO L471 AbstractCegarLoop]: Abstraction has 6057 states and 7244 transitions. [2024-11-09 06:11:24,223 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.7777777777777777) internal successors, (150), 54 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) [2024-11-09 06:11:24,223 INFO L276 IsEmpty]: Start isEmpty. Operand 6057 states and 7244 transitions. [2024-11-09 06:11:24,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-09 06:11:24,225 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:11:24,226 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:11:24,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2024-11-09 06:11:24,426 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2024-11-09 06:11:24,426 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)] === [2024-11-09 06:11:24,426 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:11:24,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1312886193, now seen corresponding path program 25 times [2024-11-09 06:11:24,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:11:24,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368583710] [2024-11-09 06:11:24,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:11:24,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:11:24,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:11:26,352 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 176 proven. 409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:11:26,353 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:11:26,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368583710] [2024-11-09 06:11:26,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368583710] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:11:26,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40935131] [2024-11-09 06:11:26,353 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:11:26,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:11:26,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:11:26,354 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:11:26,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-11-09 06:11:26,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:11:26,611 INFO L255 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 132 conjuncts are in the unsatisfiable core [2024-11-09 06:11:26,614 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:11:27,747 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 210 proven. 375 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:11:27,747 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:11:29,171 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 [2024-11-09 06:11:29,839 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 210 proven. 375 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:11:29,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40935131] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:11:29,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1147835139] [2024-11-09 06:11:29,840 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 06:11:29,840 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:11:29,840 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:11:29,840 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:11:29,841 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:11:30,440 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:11:33,995 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '209371#(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_878| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_890| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_890|) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_878|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_890|) (<= 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_878|) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))))' at error location [2024-11-09 06:11:33,995 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:11:33,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:11:33,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 67 [2024-11-09 06:11:33,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831771069] [2024-11-09 06:11:33,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:11:33,996 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-11-09 06:11:33,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:11:33,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-11-09 06:11:33,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=555, Invalid=6085, Unknown=2, NotChecked=0, Total=6642 [2024-11-09 06:11:33,997 INFO L87 Difference]: Start difference. First operand 6057 states and 7244 transitions. Second operand has 68 states, 67 states have (on average 3.1194029850746268) internal successors, (209), 68 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:11:37,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:11:37,909 INFO L93 Difference]: Finished difference Result 6675 states and 7881 transitions. [2024-11-09 06:11:37,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-09 06:11:37,909 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 3.1194029850746268) internal successors, (209), 68 states have internal predecessors, (209), 0 states have call successors, (0), 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 102 [2024-11-09 06:11:37,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:11:37,913 INFO L225 Difference]: With dead ends: 6675 [2024-11-09 06:11:37,913 INFO L226 Difference]: Without dead ends: 6675 [2024-11-09 06:11:37,914 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 242 SyntacticMatches, 14 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4608 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=982, Invalid=11226, Unknown=2, NotChecked=0, Total=12210 [2024-11-09 06:11:37,915 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 338 mSDsluCounter, 1379 mSDsCounter, 0 mSdLazyCounter, 2761 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 1444 SdHoareTripleChecker+Invalid, 2761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:11:37,915 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 1444 Invalid, 2761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2761 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-09 06:11:37,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6675 states. [2024-11-09 06:11:38,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6675 to 6141. [2024-11-09 06:11:38,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6141 states, 6139 states have (on average 1.1969376119889232) internal successors, (7348), 6140 states have internal predecessors, (7348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:11:38,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6141 states to 6141 states and 7348 transitions. [2024-11-09 06:11:38,013 INFO L78 Accepts]: Start accepts. Automaton has 6141 states and 7348 transitions. Word has length 102 [2024-11-09 06:11:38,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:11:38,013 INFO L471 AbstractCegarLoop]: Abstraction has 6141 states and 7348 transitions. [2024-11-09 06:11:38,013 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 3.1194029850746268) internal successors, (209), 68 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:11:38,013 INFO L276 IsEmpty]: Start isEmpty. Operand 6141 states and 7348 transitions. [2024-11-09 06:11:38,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-11-09 06:11:38,016 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:11:38,016 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:11:38,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2024-11-09 06:11:38,216 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-11-09 06:11:38,217 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)] === [2024-11-09 06:11:38,217 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:11:38,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1163764609, now seen corresponding path program 20 times [2024-11-09 06:11:38,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:11:38,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965886516] [2024-11-09 06:11:38,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:11:38,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:11:38,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:11:39,960 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 22 proven. 475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:11:39,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:11:39,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965886516] [2024-11-09 06:11:39,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965886516] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:11:39,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416548677] [2024-11-09 06:11:39,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:11:39,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:11:39,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:11:39,961 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:11:39,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-11-09 06:11:40,372 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-11-09 06:11:40,372 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:11:40,376 INFO L255 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 107 conjuncts are in the unsatisfiable core [2024-11-09 06:11:40,380 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:11:40,385 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 [2024-11-09 06:11:40,968 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 [2024-11-09 06:11:41,058 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 19 treesize of output 14 [2024-11-09 06:11:43,544 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:11:43,545 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 [2024-11-09 06:11:43,930 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 126 proven. 371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:11:43,930 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:11:47,915 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:11:47,915 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 [2024-11-09 06:11:47,930 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:11:47,930 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 34 [2024-11-09 06:11:47,938 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 11 treesize of output 7 [2024-11-09 06:11:47,944 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 13 treesize of output 9 [2024-11-09 06:11:49,306 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 126 proven. 371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:11:49,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416548677] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:11:49,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2050993570] [2024-11-09 06:11:49,307 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 06:11:49,307 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:11:49,307 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:11:49,308 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:11:49,308 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:11:50,067 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:11:54,036 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '222970#(exists ((|v_ULTIMATE.start_cstrcspn_#t~post2#1.base_361| Int) (|v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_367| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post2#1.base_361|) (<= (select |#length| |v_ULTIMATE.start_cstrcspn_#t~post2#1.base_361|) |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_367|) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_367|) (or (and (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (= 0 |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_367|) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0)) (and (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (= |ULTIMATE.start_cstrcspn_~spanp~0#1.offset| 1) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0)))))' at error location [2024-11-09 06:11:54,037 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:11:54,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:11:54,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 28, 28] total 86 [2024-11-09 06:11:54,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214860691] [2024-11-09 06:11:54,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:11:54,037 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2024-11-09 06:11:54,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:11:54,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2024-11-09 06:11:54,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=669, Invalid=9431, Unknown=0, NotChecked=0, Total=10100 [2024-11-09 06:11:54,039 INFO L87 Difference]: Start difference. First operand 6141 states and 7348 transitions. Second operand has 87 states, 87 states have (on average 3.6206896551724137) internal successors, (315), 86 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:13:45,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:13:45,618 INFO L93 Difference]: Finished difference Result 11651 states and 13862 transitions. [2024-11-09 06:13:45,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-11-09 06:13:45,619 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 3.6206896551724137) internal successors, (315), 86 states have internal predecessors, (315), 0 states have call successors, (0), 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 [2024-11-09 06:13:45,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:13:45,627 INFO L225 Difference]: With dead ends: 11651 [2024-11-09 06:13:45,627 INFO L226 Difference]: Without dead ends: 7322 [2024-11-09 06:13:45,629 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5283 ImplicationChecksByTransitivity, 119.2s TimeCoverageRelationStatistics Valid=2034, Invalid=20611, Unknown=5, NotChecked=0, Total=22650 [2024-11-09 06:13:45,630 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 675 mSDsluCounter, 1714 mSDsCounter, 0 mSdLazyCounter, 3551 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 675 SdHoareTripleChecker+Valid, 1765 SdHoareTripleChecker+Invalid, 3652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 3551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:13:45,630 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [675 Valid, 1765 Invalid, 3652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 3551 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-11-09 06:13:45,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7322 states. [2024-11-09 06:13:45,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7322 to 6698. [2024-11-09 06:13:45,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6698 states, 6696 states have (on average 1.1969832735961767) internal successors, (8015), 6697 states have internal predecessors, (8015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:13:45,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6698 states to 6698 states and 8015 transitions. [2024-11-09 06:13:45,726 INFO L78 Accepts]: Start accepts. Automaton has 6698 states and 8015 transitions. Word has length 105 [2024-11-09 06:13:45,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:13:45,726 INFO L471 AbstractCegarLoop]: Abstraction has 6698 states and 8015 transitions. [2024-11-09 06:13:45,727 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 3.6206896551724137) internal successors, (315), 86 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:13:45,727 INFO L276 IsEmpty]: Start isEmpty. Operand 6698 states and 8015 transitions. [2024-11-09 06:13:45,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-11-09 06:13:45,731 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:13:45,732 INFO L215 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:13:45,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2024-11-09 06:13:45,932 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-11-09 06:13:45,932 INFO L396 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 06:13:45,932 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:13:45,933 INFO L85 PathProgramCache]: Analyzing trace with hash -82970028, now seen corresponding path program 26 times [2024-11-09 06:13:45,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:13:45,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26285534] [2024-11-09 06:13:45,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:13:45,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:13:45,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:13:48,286 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 28 proven. 611 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:13:48,286 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:13:48,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26285534] [2024-11-09 06:13:48,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26285534] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:13:48,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3915231] [2024-11-09 06:13:48,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:13:48,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:13:48,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:13:48,288 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:13:48,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec8590a-4e9a-41d3-9115-d92c73b7fa58/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-11-09 06:13:49,100 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-11-09 06:13:49,100 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:13:49,106 INFO L255 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 141 conjuncts are in the unsatisfiable core [2024-11-09 06:13:49,110 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:13:49,119 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 [2024-11-09 06:13:50,706 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 [2024-11-09 06:13:50,847 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 25 treesize of output 24 [2024-11-09 06:14:01,576 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:14:01,576 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2024-11-09 06:14:01,990 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 222 proven. 417 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:14:01,990 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:14:07,174 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 15 treesize of output 11 [2024-11-09 06:14:09,555 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:14:09,556 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 24 treesize of output 25 [2024-11-09 06:14:09,574 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:14:09,574 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 25 treesize of output 29 [2024-11-09 06:14:09,588 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 [2024-11-09 06:14:09,633 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:14:09,633 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 44 treesize of output 49 [2024-11-09 06:14:13,999 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 222 proven. 417 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:14:14,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3915231] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:14:14,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2072214808] [2024-11-09 06:14:14,001 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 06:14:14,001 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:14:14,001 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:14:14,002 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:14:14,002 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:14:14,660 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:14:20,336 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '242171#(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_941| Int) (|v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_953| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_953|) (<= 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_941|) |v_ULTIMATE.start_cstrcspn_#t~post4#1.offset_953|) (<= 2 |v_ULTIMATE.start_cstrcspn_#t~post4#1.base_941|) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))))' at error location [2024-11-09 06:14:20,336 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:14:20,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:14:20,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 37, 35] total 108 [2024-11-09 06:14:20,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657072499] [2024-11-09 06:14:20,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:14:20,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2024-11-09 06:14:20,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:14:20,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2024-11-09 06:14:20,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=943, Invalid=13816, Unknown=3, NotChecked=0, Total=14762 [2024-11-09 06:14:20,341 INFO L87 Difference]: Start difference. First operand 6698 states and 8015 transitions. Second operand has 108 states, 108 states have (on average 2.9444444444444446) internal successors, (318), 108 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) [2024-11-09 06:14:42,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 06:15:08,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 06:15:10,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 06:15:12,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 06:15:26,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 06:15:28,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 06:15:43,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 06:15:46,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 06:15:54,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 06:15:57,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 06:16:00,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-09 06:16:11,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 06:16:12,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 06:16:14,316 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 06:16:32,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 06:16:34,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 06:16:58,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 06:17:00,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 06:17:02,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 06:17:15,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 06:17:25,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 06:17:27,903 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 06:17:47,274 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-09 06:17:49,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-09 06:17:50,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 06:18:05,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 06:18:28,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 06:18:30,455 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-09 06:18:31,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 06:19:08,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-09 06:19:15,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 06:19:16,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 06:19:18,343 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]