./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrnlen-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrnlen-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba --witnessprinter.witness.filename witness.graphml --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 b06b08d501323de811576605780ed72bdf24037e477195316df25396abb6c35b --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 02:26:39,255 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:26:39,258 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:26:39,300 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:26:39,300 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:26:39,302 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:26:39,305 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:26:39,312 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:26:39,314 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:26:39,322 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:26:39,324 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:26:39,326 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:26:39,326 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:26:39,330 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:26:39,332 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:26:39,333 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:26:39,334 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:26:39,335 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:26:39,337 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:26:39,338 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:26:39,340 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:26:39,346 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:26:39,348 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:26:39,350 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:26:39,362 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:26:39,363 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:26:39,363 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:26:39,366 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:26:39,366 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:26:39,367 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:26:39,368 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:26:39,369 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:26:39,370 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:26:39,372 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:26:39,373 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:26:39,373 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:26:39,374 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:26:39,374 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:26:39,374 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:26:39,375 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:26:39,375 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:26:39,376 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-22 02:26:39,420 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:26:39,420 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:26:39,421 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:26:39,421 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:26:39,422 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:26:39,423 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:26:39,423 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:26:39,423 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:26:39,423 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:26:39,423 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 02:26:39,424 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:26:39,425 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:26:39,425 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 02:26:39,425 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 02:26:39,425 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:26:39,426 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 02:26:39,426 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 02:26:39,426 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 02:26:39,427 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-22 02:26:39,427 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-22 02:26:39,427 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:26:39,427 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 02:26:39,428 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-22 02:26:39,428 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:26:39,428 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 02:26:39,428 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:26:39,428 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-22 02:26:39,429 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-22 02:26:39,429 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-22 02:26:39,429 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:26:39,430 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-22 02:26:39,430 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 02:26:39,430 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:26:39,430 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:26:39,430 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:26:39,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:26:39,431 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:26:39,431 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 02:26:39,431 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:26:39,431 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 02:26:39,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 02:26:39,432 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:26:39,432 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b06b08d501323de811576605780ed72bdf24037e477195316df25396abb6c35b [2022-11-22 02:26:39,729 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:26:39,766 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:26:39,769 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:26:39,770 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:26:39,770 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:26:39,772 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/array-memsafety/openbsd_cstrnlen-alloca-1.i [2022-11-22 02:26:42,876 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:26:43,183 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:26:43,184 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/sv-benchmarks/c/array-memsafety/openbsd_cstrnlen-alloca-1.i [2022-11-22 02:26:43,194 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/data/f8bf60183/07c442c827674dda91c893d6b4339615/FLAG309b8d367 [2022-11-22 02:26:43,208 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/data/f8bf60183/07c442c827674dda91c893d6b4339615 [2022-11-22 02:26:43,211 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:26:43,213 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:26:43,214 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:26:43,214 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:26:43,222 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:26:43,224 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:26:43" (1/1) ... [2022-11-22 02:26:43,225 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@366974f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:26:43, skipping insertion in model container [2022-11-22 02:26:43,225 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:26:43" (1/1) ... [2022-11-22 02:26:43,233 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:26:43,273 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:26:43,569 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:26:43,579 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:26:43,615 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:26:43,639 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:26:43,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:26:43 WrapperNode [2022-11-22 02:26:43,640 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:26:43,641 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:26:43,642 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:26:43,642 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:26:43,649 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:26:43" (1/1) ... [2022-11-22 02:26:43,662 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:26:43" (1/1) ... [2022-11-22 02:26:43,682 INFO L138 Inliner]: procedures = 117, calls = 9, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 61 [2022-11-22 02:26:43,682 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:26:43,683 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:26:43,683 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:26:43,683 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:26:43,691 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:26:43" (1/1) ... [2022-11-22 02:26:43,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:26:43" (1/1) ... [2022-11-22 02:26:43,695 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:26:43" (1/1) ... [2022-11-22 02:26:43,696 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:26:43" (1/1) ... [2022-11-22 02:26:43,701 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:26:43" (1/1) ... [2022-11-22 02:26:43,705 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:26:43" (1/1) ... [2022-11-22 02:26:43,707 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:26:43" (1/1) ... [2022-11-22 02:26:43,708 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:26:43" (1/1) ... [2022-11-22 02:26:43,709 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:26:43,710 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:26:43,711 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:26:43,711 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:26:43,711 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:26:43" (1/1) ... [2022-11-22 02:26:43,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:26:43,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:26:43,748 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:26:43,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:26:43,785 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 02:26:43,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 02:26:43,786 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 02:26:43,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 02:26:43,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:26:43,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:26:43,901 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:26:43,906 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:26:44,206 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:26:44,268 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:26:44,268 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-22 02:26:44,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:26:44 BoogieIcfgContainer [2022-11-22 02:26:44,271 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:26:44,273 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:26:44,274 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:26:44,277 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:26:44,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:26:43" (1/3) ... [2022-11-22 02:26:44,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55217a34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:26:44, skipping insertion in model container [2022-11-22 02:26:44,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:26:43" (2/3) ... [2022-11-22 02:26:44,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55217a34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:26:44, skipping insertion in model container [2022-11-22 02:26:44,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:26:44" (3/3) ... [2022-11-22 02:26:44,280 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrnlen-alloca-1.i [2022-11-22 02:26:44,300 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:26:44,300 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2022-11-22 02:26:44,366 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:26:44,374 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@3ace5b81, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:26:44,375 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-22 02:26:44,381 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 10 states have (on average 2.1) internal successors, (21), 17 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) [2022-11-22 02:26:44,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-22 02:26:44,388 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:26:44,388 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-22 02:26:44,389 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-22 02:26:44,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:26:44,396 INFO L85 PathProgramCache]: Analyzing trace with hash 108370, now seen corresponding path program 1 times [2022-11-22 02:26:44,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:26:44,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081715407] [2022-11-22 02:26:44,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:26:44,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:26:44,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:26:44,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:26:44,754 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:26:44,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081715407] [2022-11-22 02:26:44,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081715407] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:26:44,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:26:44,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 02:26:44,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312664093] [2022-11-22 02:26:44,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:26:44,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:26:44,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:26:44,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:26:44,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:26:44,808 INFO L87 Difference]: Start difference. First operand has 18 states, 10 states have (on average 2.1) internal successors, (21), 17 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) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:26:44,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:26:44,883 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2022-11-22 02:26:44,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:26:44,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-22 02:26:44,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:26:44,904 INFO L225 Difference]: With dead ends: 16 [2022-11-22 02:26:44,906 INFO L226 Difference]: Without dead ends: 15 [2022-11-22 02:26:44,908 INFO L412 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 [2022-11-22 02:26:44,913 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 13 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:26:44,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 7 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:26:44,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-22 02:26:44,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-22 02:26:44,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.7) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:26:44,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-11-22 02:26:44,950 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 3 [2022-11-22 02:26:44,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:26:44,950 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-11-22 02:26:44,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:26:44,952 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-11-22 02:26:44,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-22 02:26:44,953 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:26:44,953 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-22 02:26:44,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 02:26:44,955 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-22 02:26:44,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:26:44,956 INFO L85 PathProgramCache]: Analyzing trace with hash 108371, now seen corresponding path program 1 times [2022-11-22 02:26:44,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:26:44,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077072958] [2022-11-22 02:26:44,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:26:44,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:26:45,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:26:45,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:26:45,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:26:45,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077072958] [2022-11-22 02:26:45,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077072958] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:26:45,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:26:45,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 02:26:45,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007832128] [2022-11-22 02:26:45,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:26:45,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:26:45,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:26:45,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:26:45,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:26:45,260 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:26:45,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:26:45,343 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2022-11-22 02:26:45,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:26:45,344 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-22 02:26:45,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:26:45,345 INFO L225 Difference]: With dead ends: 14 [2022-11-22 02:26:45,345 INFO L226 Difference]: Without dead ends: 14 [2022-11-22 02:26:45,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:26:45,347 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 14 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:26:45,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 12 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:26:45,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-22 02:26:45,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-22 02:26:45,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 10 states have (on average 1.6) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:26:45,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-11-22 02:26:45,351 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 3 [2022-11-22 02:26:45,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:26:45,351 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-11-22 02:26:45,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:26:45,352 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-11-22 02:26:45,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-22 02:26:45,352 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:26:45,353 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-22 02:26:45,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 02:26:45,353 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-22 02:26:45,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:26:45,354 INFO L85 PathProgramCache]: Analyzing trace with hash 110085, now seen corresponding path program 1 times [2022-11-22 02:26:45,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:26:45,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348720153] [2022-11-22 02:26:45,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:26:45,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:26:45,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:26:45,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:26:45,550 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:26:45,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348720153] [2022-11-22 02:26:45,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348720153] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:26:45,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:26:45,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 02:26:45,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826434631] [2022-11-22 02:26:45,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:26:45,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:26:45,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:26:45,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:26:45,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:26:45,554 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:26:45,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:26:45,593 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2022-11-22 02:26:45,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:26:45,594 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-22 02:26:45,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:26:45,595 INFO L225 Difference]: With dead ends: 13 [2022-11-22 02:26:45,596 INFO L226 Difference]: Without dead ends: 13 [2022-11-22 02:26:45,596 INFO L412 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 [2022-11-22 02:26:45,601 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:26:45,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 6 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:26:45,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-22 02:26:45,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-22 02:26:45,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 10 states have (on average 1.5) internal successors, (15), 12 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) [2022-11-22 02:26:45,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-11-22 02:26:45,606 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 3 [2022-11-22 02:26:45,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:26:45,606 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-11-22 02:26:45,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:26:45,606 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-11-22 02:26:45,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-22 02:26:45,607 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:26:45,607 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-22 02:26:45,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 02:26:45,607 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-22 02:26:45,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:26:45,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1014253185, now seen corresponding path program 1 times [2022-11-22 02:26:45,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:26:45,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52179944] [2022-11-22 02:26:45,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:26:45,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:26:45,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:26:45,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:26:45,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:26:45,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52179944] [2022-11-22 02:26:45,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52179944] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:26:45,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:26:45,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 02:26:45,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515931314] [2022-11-22 02:26:45,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:26:45,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:26:45,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:26:45,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:26:45,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:26:45,711 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 3 states, 2 states have (on average 3.0) 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) [2022-11-22 02:26:45,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:26:45,736 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2022-11-22 02:26:45,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:26:45,736 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) 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 [2022-11-22 02:26:45,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:26:45,737 INFO L225 Difference]: With dead ends: 12 [2022-11-22 02:26:45,737 INFO L226 Difference]: Without dead ends: 12 [2022-11-22 02:26:45,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:26:45,747 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:26:45,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 7 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:26:45,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-22 02:26:45,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-22 02:26:45,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 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) [2022-11-22 02:26:45,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2022-11-22 02:26:45,750 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 6 [2022-11-22 02:26:45,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:26:45,750 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2022-11-22 02:26:45,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) 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) [2022-11-22 02:26:45,751 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2022-11-22 02:26:45,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-22 02:26:45,751 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:26:45,751 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-22 02:26:45,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 02:26:45,754 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-22 02:26:45,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:26:45,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1014253184, now seen corresponding path program 1 times [2022-11-22 02:26:45,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:26:45,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239249074] [2022-11-22 02:26:45,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:26:45,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:26:45,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:26:45,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:26:45,874 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:26:45,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239249074] [2022-11-22 02:26:45,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239249074] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:26:45,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:26:45,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 02:26:45,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357111556] [2022-11-22 02:26:45,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:26:45,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:26:45,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:26:45,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:26:45,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:26:45,877 INFO L87 Difference]: Start difference. First operand 12 states and 14 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) [2022-11-22 02:26:45,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:26:45,909 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2022-11-22 02:26:45,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:26:45,910 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 [2022-11-22 02:26:45,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:26:45,912 INFO L225 Difference]: With dead ends: 19 [2022-11-22 02:26:45,912 INFO L226 Difference]: Without dead ends: 19 [2022-11-22 02:26:45,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:26:45,915 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 25 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:26:45,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 13 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:26:45,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-22 02:26:45,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2022-11-22 02:26:45,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:26:45,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2022-11-22 02:26:45,926 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 6 [2022-11-22 02:26:45,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:26:45,926 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2022-11-22 02:26:45,926 INFO L496 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) [2022-11-22 02:26:45,932 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2022-11-22 02:26:45,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-22 02:26:45,933 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:26:45,933 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:26:45,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 02:26:45,934 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-22 02:26:45,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:26:45,935 INFO L85 PathProgramCache]: Analyzing trace with hash 260454200, now seen corresponding path program 1 times [2022-11-22 02:26:45,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:26:45,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880316253] [2022-11-22 02:26:45,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:26:45,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:26:45,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:26:46,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:26:46,102 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:26:46,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880316253] [2022-11-22 02:26:46,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880316253] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:26:46,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:26:46,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:26:46,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845762109] [2022-11-22 02:26:46,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:26:46,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:26:46,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:26:46,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:26:46,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:26:46,104 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:26:46,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:26:46,166 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2022-11-22 02:26:46,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:26:46,167 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2022-11-22 02:26:46,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:26:46,167 INFO L225 Difference]: With dead ends: 19 [2022-11-22 02:26:46,168 INFO L226 Difference]: Without dead ends: 19 [2022-11-22 02:26:46,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-22 02:26:46,169 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 27 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:26:46,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 13 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:26:46,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-22 02:26:46,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2022-11-22 02:26:46,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:26:46,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-11-22 02:26:46,172 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 8 [2022-11-22 02:26:46,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:26:46,173 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-11-22 02:26:46,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:26:46,173 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-11-22 02:26:46,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-22 02:26:46,174 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:26:46,174 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:26:46,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 02:26:46,174 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-22 02:26:46,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:26:46,175 INFO L85 PathProgramCache]: Analyzing trace with hash -520849326, now seen corresponding path program 1 times [2022-11-22 02:26:46,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:26:46,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132317485] [2022-11-22 02:26:46,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:26:46,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:26:46,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:26:46,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:26:46,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:26:46,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132317485] [2022-11-22 02:26:46,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132317485] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:26:46,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:26:46,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 02:26:46,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484002209] [2022-11-22 02:26:46,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:26:46,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:26:46,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:26:46,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:26:46,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:26:46,284 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2022-11-22 02:26:46,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:26:46,301 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2022-11-22 02:26:46,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:26:46,302 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 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 [2022-11-22 02:26:46,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:26:46,303 INFO L225 Difference]: With dead ends: 14 [2022-11-22 02:26:46,303 INFO L226 Difference]: Without dead ends: 12 [2022-11-22 02:26:46,303 INFO L412 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 [2022-11-22 02:26:46,304 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:26:46,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 12 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:26:46,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-22 02:26:46,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-22 02:26:46,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 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) [2022-11-22 02:26:46,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2022-11-22 02:26:46,307 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2022-11-22 02:26:46,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:26:46,307 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2022-11-22 02:26:46,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2022-11-22 02:26:46,308 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2022-11-22 02:26:46,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-22 02:26:46,308 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:26:46,308 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2022-11-22 02:26:46,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 02:26:46,309 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-22 02:26:46,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:26:46,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1033953633, now seen corresponding path program 1 times [2022-11-22 02:26:46,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:26:46,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65281951] [2022-11-22 02:26:46,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:26:46,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:26:46,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:26:46,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:26:46,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:26:46,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65281951] [2022-11-22 02:26:46,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65281951] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:26:46,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:26:46,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:26:46,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854869178] [2022-11-22 02:26:46,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:26:46,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:26:46,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:26:46,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:26:46,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:26:46,477 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:26:46,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:26:46,528 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2022-11-22 02:26:46,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 02:26:46,529 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2022-11-22 02:26:46,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:26:46,530 INFO L225 Difference]: With dead ends: 20 [2022-11-22 02:26:46,530 INFO L226 Difference]: Without dead ends: 14 [2022-11-22 02:26:46,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-22 02:26:46,531 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 11 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:26:46,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 12 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:26:46,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-22 02:26:46,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2022-11-22 02:26:46,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 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) [2022-11-22 02:26:46,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-11-22 02:26:46,534 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2022-11-22 02:26:46,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:26:46,534 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-11-22 02:26:46,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:26:46,535 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-11-22 02:26:46,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 02:26:46,535 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:26:46,535 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:26:46,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-22 02:26:46,536 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-22 02:26:46,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:26:46,536 INFO L85 PathProgramCache]: Analyzing trace with hash -405226702, now seen corresponding path program 1 times [2022-11-22 02:26:46,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:26:46,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870610709] [2022-11-22 02:26:46,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:26:46,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:26:46,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:26:46,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:26:46,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:26:46,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870610709] [2022-11-22 02:26:46,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870610709] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:26:46,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928269181] [2022-11-22 02:26:46,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:26:46,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:26:46,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:26:46,735 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:26:46,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 02:26:46,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:26:46,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 02:26:46,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:26:46,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:26:46,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:26:47,124 INFO L350 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 [2022-11-22 02:26:47,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:26:47,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928269181] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:26:47,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [485063325] [2022-11-22 02:26:47,166 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 02:26:47,166 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:26:47,170 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:26:47,176 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:26:47,176 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:26:47,290 INFO L350 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 8 treesize of output 7 [2022-11-22 02:26:47,338 INFO L350 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 [2022-11-22 02:26:47,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 02:26:47,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 02:26:47,750 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:26:49,514 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '383#(and (not (= (mod |ULTIMATE.start_cstrnlen_~maxlen#1| 4294967296) 0)) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.offset|) (<= 0 |#NULL.base|) (<= 1 |ULTIMATE.start_cstrnlen_~cp~0#1.offset|) (<= |ULTIMATE.start_cstrnlen_~maxlen#1| 2147483646) |ULTIMATE.start_cstrnlen_#t~short5#1| (<= 1 |ULTIMATE.start_cstrnlen_#in~maxlen#1|) (<= 0 |ULTIMATE.start_cstrnlen_#in~str#1.base|) (not (<= (+ |ULTIMATE.start_cstrnlen_~cp~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrnlen_~cp~0#1.base|))) (<= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= |ULTIMATE.start_cstrnlen_#in~maxlen#1| 2147483647) (<= |ULTIMATE.start_cstrnlen_#in~str#1.offset| 0) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrnlen_~str#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrnlen_~cp~0#1.base|) (<= 0 |ULTIMATE.start_cstrnlen_#in~str#1.offset|) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrnlen_~str#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrnlen_~str#1.base|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-22 02:26:49,514 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:26:49,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:26:49,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2022-11-22 02:26:49,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59590668] [2022-11-22 02:26:49,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:26:49,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-22 02:26:49,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:26:49,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-22 02:26:49,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-11-22 02:26:49,520 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 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) [2022-11-22 02:26:49,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:26:49,674 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2022-11-22 02:26:49,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 02:26:49,675 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 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) Word has length 12 [2022-11-22 02:26:49,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:26:49,676 INFO L225 Difference]: With dead ends: 18 [2022-11-22 02:26:49,676 INFO L226 Difference]: Without dead ends: 18 [2022-11-22 02:26:49,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2022-11-22 02:26:49,677 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 66 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:26:49,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 16 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:26:49,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-22 02:26:49,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2022-11-22 02:26:49,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:26:49,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-11-22 02:26:49,679 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 12 [2022-11-22 02:26:49,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:26:49,679 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-11-22 02:26:49,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 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) [2022-11-22 02:26:49,680 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-11-22 02:26:49,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-22 02:26:49,680 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:26:49,680 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-22 02:26:49,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-22 02:26:49,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:26:49,881 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-22 02:26:49,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:26:49,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1957578221, now seen corresponding path program 2 times [2022-11-22 02:26:49,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:26:49,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103429743] [2022-11-22 02:26:49,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:26:49,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:26:49,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:26:50,240 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:26:50,241 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:26:50,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103429743] [2022-11-22 02:26:50,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103429743] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:26:50,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69243791] [2022-11-22 02:26:50,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:26:50,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:26:50,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:26:50,243 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:26:50,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 02:26:50,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 02:26:50,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:26:50,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-22 02:26:50,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:26:50,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 02:26:50,573 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-22 02:26:50,573 INFO L350 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 32 treesize of output 20 [2022-11-22 02:26:50,589 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:26:50,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:26:50,651 INFO L350 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 [2022-11-22 02:26:50,654 INFO L350 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 [2022-11-22 02:26:50,755 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:26:50,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69243791] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:26:50,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [759570639] [2022-11-22 02:26:50,757 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 02:26:50,758 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:26:50,758 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:26:50,758 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:26:50,758 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:26:50,789 INFO L350 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 8 treesize of output 7 [2022-11-22 02:26:50,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 02:26:50,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 02:26:50,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 02:26:51,136 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:26:52,848 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '543#(and (not (= (mod |ULTIMATE.start_cstrnlen_~maxlen#1| 4294967296) 0)) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.offset|) (<= 0 |#NULL.base|) (<= 1 |ULTIMATE.start_cstrnlen_~cp~0#1.offset|) (<= |ULTIMATE.start_cstrnlen_~maxlen#1| 2147483646) |ULTIMATE.start_cstrnlen_#t~short5#1| (<= 1 |ULTIMATE.start_cstrnlen_#in~maxlen#1|) (<= 0 |ULTIMATE.start_cstrnlen_#in~str#1.base|) (not (<= (+ |ULTIMATE.start_cstrnlen_~cp~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrnlen_~cp~0#1.base|))) (<= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= |ULTIMATE.start_cstrnlen_#in~maxlen#1| 2147483647) (<= |ULTIMATE.start_cstrnlen_#in~str#1.offset| 0) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrnlen_~str#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrnlen_~cp~0#1.base|) (<= 0 |ULTIMATE.start_cstrnlen_#in~str#1.offset|) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrnlen_~str#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrnlen_~str#1.base|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-22 02:26:52,849 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:26:52,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:26:52,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-11-22 02:26:52,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717390963] [2022-11-22 02:26:52,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:26:52,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-22 02:26:52,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:26:52,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-22 02:26:52,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2022-11-22 02:26:52,851 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 20 states, 20 states have (on average 2.0) 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) [2022-11-22 02:26:53,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:26:53,162 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2022-11-22 02:26:53,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 02:26:53,163 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) 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 16 [2022-11-22 02:26:53,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:26:53,163 INFO L225 Difference]: With dead ends: 29 [2022-11-22 02:26:53,163 INFO L226 Difference]: Without dead ends: 20 [2022-11-22 02:26:53,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2022-11-22 02:26:53,164 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 47 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:26:53,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 35 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:26:53,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-22 02:26:53,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2022-11-22 02:26:53,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:26:53,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-11-22 02:26:53,168 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2022-11-22 02:26:53,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:26:53,168 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-11-22 02:26:53,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) 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) [2022-11-22 02:26:53,168 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-11-22 02:26:53,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-22 02:26:53,169 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:26:53,169 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2022-11-22 02:26:53,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 02:26:53,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-22 02:26:53,375 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-22 02:26:53,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:26:53,376 INFO L85 PathProgramCache]: Analyzing trace with hash -931581148, now seen corresponding path program 3 times [2022-11-22 02:26:53,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:26:53,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367719611] [2022-11-22 02:26:53,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:26:53,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:26:53,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:26:53,688 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:26:53,688 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:26:53,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367719611] [2022-11-22 02:26:53,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367719611] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:26:53,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134286050] [2022-11-22 02:26:53,689 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:26:53,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:26:53,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:26:53,690 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:26:53,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 02:26:53,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:26:53,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:26:53,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-22 02:26:53,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:26:53,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:26:53,900 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:26:53,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:26:54,100 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:26:54,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134286050] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:26:54,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [573721294] [2022-11-22 02:26:54,102 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 02:26:54,103 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:26:54,103 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:26:54,103 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:26:54,103 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:26:54,127 INFO L350 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 8 treesize of output 7 [2022-11-22 02:26:54,165 INFO L350 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 [2022-11-22 02:26:54,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 02:26:54,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 02:26:54,441 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:26:56,106 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '734#(and (not (= (mod |ULTIMATE.start_cstrnlen_~maxlen#1| 4294967296) 0)) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.offset|) (<= 0 |#NULL.base|) (<= 1 |ULTIMATE.start_cstrnlen_~cp~0#1.offset|) (<= |ULTIMATE.start_cstrnlen_~maxlen#1| 2147483646) |ULTIMATE.start_cstrnlen_#t~short5#1| (<= 1 |ULTIMATE.start_cstrnlen_#in~maxlen#1|) (<= 0 |ULTIMATE.start_cstrnlen_#in~str#1.base|) (not (<= (+ |ULTIMATE.start_cstrnlen_~cp~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrnlen_~cp~0#1.base|))) (<= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= |ULTIMATE.start_cstrnlen_#in~maxlen#1| 2147483647) (<= |ULTIMATE.start_cstrnlen_#in~str#1.offset| 0) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrnlen_~str#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrnlen_~cp~0#1.base|) (<= 0 |ULTIMATE.start_cstrnlen_#in~str#1.offset|) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrnlen_~str#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrnlen_~str#1.base|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-22 02:26:56,106 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:26:56,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:26:56,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2022-11-22 02:26:56,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987780167] [2022-11-22 02:26:56,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:26:56,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-22 02:26:56,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:26:56,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-22 02:26:56,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2022-11-22 02:26:56,108 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 20 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:26:56,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:26:56,261 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2022-11-22 02:26:56,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 02:26:56,262 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 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 [2022-11-22 02:26:56,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:26:56,262 INFO L225 Difference]: With dead ends: 24 [2022-11-22 02:26:56,262 INFO L226 Difference]: Without dead ends: 24 [2022-11-22 02:26:56,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=191, Invalid=801, Unknown=0, NotChecked=0, Total=992 [2022-11-22 02:26:56,263 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 102 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:26:56,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 27 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:26:56,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-22 02:26:56,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-11-22 02:26:56,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:26:56,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2022-11-22 02:26:56,266 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 18 [2022-11-22 02:26:56,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:26:56,267 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2022-11-22 02:26:56,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:26:56,267 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2022-11-22 02:26:56,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-22 02:26:56,267 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:26:56,267 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1] [2022-11-22 02:26:56,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 02:26:56,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-22 02:26:56,473 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-22 02:26:56,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:26:56,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1238308603, now seen corresponding path program 4 times [2022-11-22 02:26:56,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:26:56,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55043352] [2022-11-22 02:26:56,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:26:56,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:26:56,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:26:56,954 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:26:56,954 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:26:56,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55043352] [2022-11-22 02:26:56,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55043352] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:26:56,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394059124] [2022-11-22 02:26:56,954 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 02:26:56,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:26:56,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:26:56,956 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:26:56,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 02:26:57,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:26:57,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-22 02:26:57,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:26:57,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 02:26:57,288 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:26:57,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:26:57,346 INFO L350 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 [2022-11-22 02:26:57,350 INFO L350 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 [2022-11-22 02:26:57,441 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:26:57,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394059124] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:26:57,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [160540045] [2022-11-22 02:26:57,445 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 02:26:57,445 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:26:57,445 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:26:57,445 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:26:57,446 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:26:57,481 INFO L350 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 8 treesize of output 7 [2022-11-22 02:26:57,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 02:26:57,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 02:26:57,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 02:26:57,773 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:26:59,640 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '944#(and (not (= (mod |ULTIMATE.start_cstrnlen_~maxlen#1| 4294967296) 0)) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.offset|) (<= 0 |#NULL.base|) (<= 1 |ULTIMATE.start_cstrnlen_~cp~0#1.offset|) (<= |ULTIMATE.start_cstrnlen_~maxlen#1| 2147483646) |ULTIMATE.start_cstrnlen_#t~short5#1| (<= 1 |ULTIMATE.start_cstrnlen_#in~maxlen#1|) (<= 0 |ULTIMATE.start_cstrnlen_#in~str#1.base|) (not (<= (+ |ULTIMATE.start_cstrnlen_~cp~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrnlen_~cp~0#1.base|))) (<= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= |ULTIMATE.start_cstrnlen_#in~maxlen#1| 2147483647) (<= |ULTIMATE.start_cstrnlen_#in~str#1.offset| 0) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrnlen_~str#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrnlen_~cp~0#1.base|) (<= 0 |ULTIMATE.start_cstrnlen_#in~str#1.offset|) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrnlen_~str#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrnlen_~str#1.base|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-22 02:26:59,641 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:26:59,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:26:59,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-11-22 02:26:59,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888674440] [2022-11-22 02:26:59,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:26:59,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-22 02:26:59,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:26:59,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-22 02:26:59,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2022-11-22 02:26:59,643 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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) [2022-11-22 02:26:59,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:26:59,909 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2022-11-22 02:26:59,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 02:26:59,909 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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 22 [2022-11-22 02:26:59,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:26:59,910 INFO L225 Difference]: With dead ends: 39 [2022-11-22 02:26:59,910 INFO L226 Difference]: Without dead ends: 26 [2022-11-22 02:26:59,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=154, Invalid=968, Unknown=0, NotChecked=0, Total=1122 [2022-11-22 02:26:59,912 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 43 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:26:59,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 48 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:26:59,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-22 02:26:59,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-11-22 02:26:59,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 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) [2022-11-22 02:26:59,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-11-22 02:26:59,915 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2022-11-22 02:26:59,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:26:59,915 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-11-22 02:26:59,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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) [2022-11-22 02:26:59,916 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-11-22 02:26:59,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-22 02:26:59,916 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:26:59,917 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1] [2022-11-22 02:26:59,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 02:27:00,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-22 02:27:00,122 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-22 02:27:00,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:00,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1889300138, now seen corresponding path program 5 times [2022-11-22 02:27:00,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:27:00,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919477905] [2022-11-22 02:27:00,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:00,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:27:00,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:00,458 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:00,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:27:00,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919477905] [2022-11-22 02:27:00,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919477905] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:27:00,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148670045] [2022-11-22 02:27:00,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:27:00,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:27:00,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:27:00,461 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:27:00,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 02:27:00,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-22 02:27:00,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:27:00,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-22 02:27:00,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:27:00,729 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:00,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:27:00,931 INFO L350 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 [2022-11-22 02:27:00,983 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:00,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148670045] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:27:00,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1508860368] [2022-11-22 02:27:00,985 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 02:27:00,985 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:27:00,986 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:27:00,986 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:27:00,986 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:27:01,005 INFO L350 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 8 treesize of output 7 [2022-11-22 02:27:01,032 INFO L350 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 [2022-11-22 02:27:01,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 02:27:01,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 02:27:01,284 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:27:02,869 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1191#(and (not (= (mod |ULTIMATE.start_cstrnlen_~maxlen#1| 4294967296) 0)) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.offset|) (<= 0 |#NULL.base|) (<= 1 |ULTIMATE.start_cstrnlen_~cp~0#1.offset|) (<= |ULTIMATE.start_cstrnlen_~maxlen#1| 2147483646) |ULTIMATE.start_cstrnlen_#t~short5#1| (<= 1 |ULTIMATE.start_cstrnlen_#in~maxlen#1|) (<= 0 |ULTIMATE.start_cstrnlen_#in~str#1.base|) (not (<= (+ |ULTIMATE.start_cstrnlen_~cp~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrnlen_~cp~0#1.base|))) (<= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= |ULTIMATE.start_cstrnlen_#in~maxlen#1| 2147483647) (<= |ULTIMATE.start_cstrnlen_#in~str#1.offset| 0) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrnlen_~str#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrnlen_~cp~0#1.base|) (<= 0 |ULTIMATE.start_cstrnlen_#in~str#1.offset|) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrnlen_~str#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrnlen_~str#1.base|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-22 02:27:02,870 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:27:02,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:27:02,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 22 [2022-11-22 02:27:02,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672782959] [2022-11-22 02:27:02,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:27:02,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-22 02:27:02,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:27:02,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-22 02:27:02,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2022-11-22 02:27:02,872 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:27:03,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:27:03,105 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2022-11-22 02:27:03,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-22 02:27:03,106 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 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 [2022-11-22 02:27:03,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:27:03,106 INFO L225 Difference]: With dead ends: 30 [2022-11-22 02:27:03,106 INFO L226 Difference]: Without dead ends: 30 [2022-11-22 02:27:03,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=241, Invalid=1091, Unknown=0, NotChecked=0, Total=1332 [2022-11-22 02:27:03,108 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 115 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:27:03,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 33 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:27:03,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-22 02:27:03,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-11-22 02:27:03,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:27:03,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2022-11-22 02:27:03,111 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 24 [2022-11-22 02:27:03,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:27:03,112 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2022-11-22 02:27:03,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:27:03,112 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-11-22 02:27:03,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-22 02:27:03,113 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:03,113 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 1, 1, 1, 1] [2022-11-22 02:27:03,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 02:27:03,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-22 02:27:03,318 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-22 02:27:03,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:03,319 INFO L85 PathProgramCache]: Analyzing trace with hash 662494775, now seen corresponding path program 6 times [2022-11-22 02:27:03,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:27:03,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179554998] [2022-11-22 02:27:03,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:03,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:27:03,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:03,791 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 12 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:03,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:27:03,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179554998] [2022-11-22 02:27:03,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179554998] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:27:03,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618452219] [2022-11-22 02:27:03,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:27:03,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:27:03,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:27:03,793 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:27:03,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 02:27:03,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:27:03,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:27:03,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-22 02:27:03,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:27:04,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 02:27:04,130 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 12 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:04,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:27:04,180 INFO L350 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 [2022-11-22 02:27:04,182 INFO L350 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 [2022-11-22 02:27:04,299 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 12 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:04,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618452219] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:27:04,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1328012270] [2022-11-22 02:27:04,301 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 02:27:04,301 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:27:04,301 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:27:04,302 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:27:04,302 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:27:04,320 INFO L350 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 8 treesize of output 7 [2022-11-22 02:27:04,349 INFO L350 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 [2022-11-22 02:27:04,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 02:27:04,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 02:27:04,577 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:27:06,461 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1454#(and (not (= (mod |ULTIMATE.start_cstrnlen_~maxlen#1| 4294967296) 0)) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.offset|) (<= 0 |#NULL.base|) (<= 1 |ULTIMATE.start_cstrnlen_~cp~0#1.offset|) (<= |ULTIMATE.start_cstrnlen_~maxlen#1| 2147483646) |ULTIMATE.start_cstrnlen_#t~short5#1| (<= 1 |ULTIMATE.start_cstrnlen_#in~maxlen#1|) (<= 0 |ULTIMATE.start_cstrnlen_#in~str#1.base|) (not (<= (+ |ULTIMATE.start_cstrnlen_~cp~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrnlen_~cp~0#1.base|))) (<= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= |ULTIMATE.start_cstrnlen_#in~maxlen#1| 2147483647) (<= |ULTIMATE.start_cstrnlen_#in~str#1.offset| 0) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrnlen_~str#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrnlen_~cp~0#1.base|) (<= 0 |ULTIMATE.start_cstrnlen_#in~str#1.offset|) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrnlen_~str#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrnlen_~str#1.base|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-22 02:27:06,461 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:27:06,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:27:06,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2022-11-22 02:27:06,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597975955] [2022-11-22 02:27:06,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:27:06,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-22 02:27:06,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:27:06,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-22 02:27:06,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2022-11-22 02:27:06,463 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:27:06,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:27:06,862 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2022-11-22 02:27:06,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-22 02:27:06,862 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-22 02:27:06,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:27:06,863 INFO L225 Difference]: With dead ends: 49 [2022-11-22 02:27:06,863 INFO L226 Difference]: Without dead ends: 32 [2022-11-22 02:27:06,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 59 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=176, Invalid=1306, Unknown=0, NotChecked=0, Total=1482 [2022-11-22 02:27:06,864 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 71 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:27:06,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 92 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:27:06,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-22 02:27:06,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2022-11-22 02:27:06,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:27:06,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2022-11-22 02:27:06,867 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2022-11-22 02:27:06,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:27:06,867 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2022-11-22 02:27:06,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:27:06,867 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2022-11-22 02:27:06,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-22 02:27:06,868 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:06,868 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1] [2022-11-22 02:27:06,896 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-22 02:27:07,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-22 02:27:07,078 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-22 02:27:07,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:07,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1494596152, now seen corresponding path program 7 times [2022-11-22 02:27:07,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:27:07,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920422038] [2022-11-22 02:27:07,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:07,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:27:07,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:07,603 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 9 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:07,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:27:07,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920422038] [2022-11-22 02:27:07,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920422038] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:27:07,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784648494] [2022-11-22 02:27:07,603 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 02:27:07,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:27:07,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:27:07,605 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:27:07,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 02:27:07,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:07,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-22 02:27:07,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:27:07,911 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 9 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:07,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:27:08,129 INFO L350 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 [2022-11-22 02:27:08,208 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 9 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:08,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784648494] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:27:08,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1791465212] [2022-11-22 02:27:08,210 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 02:27:08,210 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:27:08,210 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:27:08,211 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:27:08,211 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:27:08,230 INFO L350 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 8 treesize of output 7 [2022-11-22 02:27:08,259 INFO L350 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 [2022-11-22 02:27:08,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 02:27:08,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 02:27:08,501 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:27:10,368 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1758#(and (not (= (mod |ULTIMATE.start_cstrnlen_~maxlen#1| 4294967296) 0)) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.offset|) (<= 0 |#NULL.base|) (<= 1 |ULTIMATE.start_cstrnlen_~cp~0#1.offset|) (<= |ULTIMATE.start_cstrnlen_~maxlen#1| 2147483646) |ULTIMATE.start_cstrnlen_#t~short5#1| (<= 1 |ULTIMATE.start_cstrnlen_#in~maxlen#1|) (<= 0 |ULTIMATE.start_cstrnlen_#in~str#1.base|) (not (<= (+ |ULTIMATE.start_cstrnlen_~cp~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrnlen_~cp~0#1.base|))) (<= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= |ULTIMATE.start_cstrnlen_#in~maxlen#1| 2147483647) (<= |ULTIMATE.start_cstrnlen_#in~str#1.offset| 0) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrnlen_~str#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrnlen_~cp~0#1.base|) (<= 0 |ULTIMATE.start_cstrnlen_#in~str#1.offset|) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrnlen_~str#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrnlen_~str#1.base|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-22 02:27:10,368 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:27:10,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:27:10,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 23 [2022-11-22 02:27:10,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512253139] [2022-11-22 02:27:10,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:27:10,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-22 02:27:10,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:27:10,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-22 02:27:10,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2022-11-22 02:27:10,370 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:27:10,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:27:10,726 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2022-11-22 02:27:10,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 02:27:10,726 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-22 02:27:10,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:27:10,727 INFO L225 Difference]: With dead ends: 36 [2022-11-22 02:27:10,727 INFO L226 Difference]: Without dead ends: 36 [2022-11-22 02:27:10,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 59 SyntacticMatches, 9 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=250, Invalid=1232, Unknown=0, NotChecked=0, Total=1482 [2022-11-22 02:27:10,729 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 119 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:27:10,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 66 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:27:10,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-22 02:27:10,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-11-22 02:27:10,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:27:10,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2022-11-22 02:27:10,732 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 30 [2022-11-22 02:27:10,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:27:10,732 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2022-11-22 02:27:10,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:27:10,733 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2022-11-22 02:27:10,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-22 02:27:10,733 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:10,733 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 1, 1, 1, 1] [2022-11-22 02:27:10,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 02:27:10,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:27:10,934 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-22 02:27:10,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:10,935 INFO L85 PathProgramCache]: Analyzing trace with hash -87029335, now seen corresponding path program 8 times [2022-11-22 02:27:10,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:27:10,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383847997] [2022-11-22 02:27:10,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:10,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:27:10,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:11,531 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 15 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:11,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:27:11,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383847997] [2022-11-22 02:27:11,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383847997] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:27:11,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131796357] [2022-11-22 02:27:11,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:27:11,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:27:11,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:27:11,535 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:27:11,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 02:27:11,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-22 02:27:11,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:27:11,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-22 02:27:11,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:27:11,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 02:27:12,052 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 15 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:12,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:27:12,116 INFO L350 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 [2022-11-22 02:27:12,119 INFO L350 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 [2022-11-22 02:27:12,238 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 15 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:12,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131796357] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:27:12,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1153611642] [2022-11-22 02:27:12,240 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 02:27:12,240 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:27:12,241 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:27:12,241 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:27:12,241 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:27:12,274 INFO L350 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 8 treesize of output 7 [2022-11-22 02:27:12,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 02:27:12,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 02:27:12,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 02:27:12,549 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:27:14,285 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2074#(and (not (= (mod |ULTIMATE.start_cstrnlen_~maxlen#1| 4294967296) 0)) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.offset|) (<= 0 |#NULL.base|) (<= 1 |ULTIMATE.start_cstrnlen_~cp~0#1.offset|) (<= |ULTIMATE.start_cstrnlen_~maxlen#1| 2147483646) |ULTIMATE.start_cstrnlen_#t~short5#1| (<= 1 |ULTIMATE.start_cstrnlen_#in~maxlen#1|) (<= 0 |ULTIMATE.start_cstrnlen_#in~str#1.base|) (not (<= (+ |ULTIMATE.start_cstrnlen_~cp~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrnlen_~cp~0#1.base|))) (<= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= |ULTIMATE.start_cstrnlen_#in~maxlen#1| 2147483647) (<= |ULTIMATE.start_cstrnlen_#in~str#1.offset| 0) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrnlen_~str#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrnlen_~cp~0#1.base|) (<= 0 |ULTIMATE.start_cstrnlen_#in~str#1.offset|) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrnlen_~str#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrnlen_~str#1.base|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-22 02:27:14,286 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:27:14,286 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:27:14,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 25 [2022-11-22 02:27:14,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852513269] [2022-11-22 02:27:14,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:27:14,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-22 02:27:14,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:27:14,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-22 02:27:14,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2022-11-22 02:27:14,289 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:27:14,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:27:14,843 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2022-11-22 02:27:14,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-22 02:27:14,844 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-22 02:27:14,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:27:14,845 INFO L225 Difference]: With dead ends: 59 [2022-11-22 02:27:14,845 INFO L226 Difference]: Without dead ends: 38 [2022-11-22 02:27:14,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 80 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=198, Invalid=1694, Unknown=0, NotChecked=0, Total=1892 [2022-11-22 02:27:14,846 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:27:14,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 150 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:27:14,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-22 02:27:14,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-11-22 02:27:14,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:27:14,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-11-22 02:27:14,851 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2022-11-22 02:27:14,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:27:14,851 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-11-22 02:27:14,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:27:14,852 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-11-22 02:27:14,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-22 02:27:14,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:14,853 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1] [2022-11-22 02:27:14,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 02:27:15,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-22 02:27:15,062 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-22 02:27:15,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:15,063 INFO L85 PathProgramCache]: Analyzing trace with hash 213631098, now seen corresponding path program 9 times [2022-11-22 02:27:15,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:27:15,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634114927] [2022-11-22 02:27:15,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:15,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:27:15,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:15,570 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 16 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:15,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:27:15,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634114927] [2022-11-22 02:27:15,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634114927] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:27:15,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566910348] [2022-11-22 02:27:15,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:27:15,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:27:15,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:27:15,572 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:27:15,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 02:27:15,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:27:15,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:27:15,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-22 02:27:15,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:27:15,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:27:15,930 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 16 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:15,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:27:16,395 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 16 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:16,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566910348] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:27:16,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [917194401] [2022-11-22 02:27:16,397 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 02:27:16,397 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:27:16,397 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:27:16,397 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:27:16,397 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:27:16,419 INFO L350 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 8 treesize of output 7 [2022-11-22 02:27:16,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 02:27:16,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 02:27:16,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 02:27:16,702 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:27:18,754 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2444#(and (not (= (mod |ULTIMATE.start_cstrnlen_~maxlen#1| 4294967296) 0)) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.offset|) (<= 0 |#NULL.base|) (<= 1 |ULTIMATE.start_cstrnlen_~cp~0#1.offset|) (<= |ULTIMATE.start_cstrnlen_~maxlen#1| 2147483646) |ULTIMATE.start_cstrnlen_#t~short5#1| (<= 1 |ULTIMATE.start_cstrnlen_#in~maxlen#1|) (<= 0 |ULTIMATE.start_cstrnlen_#in~str#1.base|) (not (<= (+ |ULTIMATE.start_cstrnlen_~cp~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrnlen_~cp~0#1.base|))) (<= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= |ULTIMATE.start_cstrnlen_#in~maxlen#1| 2147483647) (<= |ULTIMATE.start_cstrnlen_#in~str#1.offset| 0) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrnlen_~str#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrnlen_~cp~0#1.base|) (<= 0 |ULTIMATE.start_cstrnlen_#in~str#1.offset|) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrnlen_~str#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrnlen_~str#1.base|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-22 02:27:18,754 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:27:18,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:27:18,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 33 [2022-11-22 02:27:18,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347857381] [2022-11-22 02:27:18,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:27:18,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-22 02:27:18,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:27:18,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-22 02:27:18,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1502, Unknown=0, NotChecked=0, Total=1722 [2022-11-22 02:27:18,756 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 35 states, 34 states have (on average 2.6176470588235294) internal successors, (89), 34 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:27:19,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:27:19,186 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2022-11-22 02:27:19,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-22 02:27:19,187 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.6176470588235294) internal successors, (89), 34 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-22 02:27:19,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:27:19,188 INFO L225 Difference]: With dead ends: 42 [2022-11-22 02:27:19,188 INFO L226 Difference]: Without dead ends: 42 [2022-11-22 02:27:19,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 73 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=424, Invalid=2026, Unknown=0, NotChecked=0, Total=2450 [2022-11-22 02:27:19,189 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 226 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:27:19,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 106 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:27:19,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-22 02:27:19,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-11-22 02:27:19,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:27:19,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2022-11-22 02:27:19,193 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 36 [2022-11-22 02:27:19,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:27:19,194 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2022-11-22 02:27:19,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.6176470588235294) internal successors, (89), 34 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:27:19,194 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2022-11-22 02:27:19,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-22 02:27:19,195 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:19,195 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 1, 1, 1, 1] [2022-11-22 02:27:19,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-22 02:27:19,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-22 02:27:19,401 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-22 02:27:19,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:19,402 INFO L85 PathProgramCache]: Analyzing trace with hash -786375845, now seen corresponding path program 10 times [2022-11-22 02:27:19,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:27:19,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713372769] [2022-11-22 02:27:19,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:19,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:27:19,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:20,055 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 18 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:20,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:27:20,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713372769] [2022-11-22 02:27:20,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713372769] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:27:20,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360495141] [2022-11-22 02:27:20,055 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 02:27:20,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:27:20,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:27:20,057 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:27:20,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 02:27:20,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:20,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-22 02:27:20,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:27:20,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 02:27:20,502 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 18 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:20,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:27:20,575 INFO L350 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 [2022-11-22 02:27:20,577 INFO L350 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 [2022-11-22 02:27:20,712 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 18 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:20,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360495141] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:27:20,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [435572868] [2022-11-22 02:27:20,714 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 02:27:20,714 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:27:20,714 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:27:20,714 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:27:20,714 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:27:20,733 INFO L350 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 8 treesize of output 7 [2022-11-22 02:27:20,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 02:27:20,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 02:27:20,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 02:27:20,993 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:27:22,752 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2813#(and (not (= (mod |ULTIMATE.start_cstrnlen_~maxlen#1| 4294967296) 0)) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.offset|) (<= 0 |#NULL.base|) (<= 1 |ULTIMATE.start_cstrnlen_~cp~0#1.offset|) (<= |ULTIMATE.start_cstrnlen_~maxlen#1| 2147483646) |ULTIMATE.start_cstrnlen_#t~short5#1| (<= 1 |ULTIMATE.start_cstrnlen_#in~maxlen#1|) (<= 0 |ULTIMATE.start_cstrnlen_#in~str#1.base|) (not (<= (+ |ULTIMATE.start_cstrnlen_~cp~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrnlen_~cp~0#1.base|))) (<= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= |ULTIMATE.start_cstrnlen_#in~maxlen#1| 2147483647) (<= |ULTIMATE.start_cstrnlen_#in~str#1.offset| 0) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrnlen_~str#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrnlen_~cp~0#1.base|) (<= 0 |ULTIMATE.start_cstrnlen_#in~str#1.offset|) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrnlen_~str#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrnlen_~str#1.base|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-22 02:27:22,753 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:27:22,753 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:27:22,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 28 [2022-11-22 02:27:22,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750227212] [2022-11-22 02:27:22,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:27:22,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-22 02:27:22,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:27:22,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-22 02:27:22,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1152, Unknown=0, NotChecked=0, Total=1260 [2022-11-22 02:27:22,755 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:27:23,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:27:23,367 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2022-11-22 02:27:23,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-22 02:27:23,367 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-22 02:27:23,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:27:23,368 INFO L225 Difference]: With dead ends: 69 [2022-11-22 02:27:23,368 INFO L226 Difference]: Without dead ends: 44 [2022-11-22 02:27:23,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 97 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=220, Invalid=2132, Unknown=0, NotChecked=0, Total=2352 [2022-11-22 02:27:23,369 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 103 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:27:23,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 182 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:27:23,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-22 02:27:23,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-11-22 02:27:23,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 42 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) [2022-11-22 02:27:23,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2022-11-22 02:27:23,373 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2022-11-22 02:27:23,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:27:23,373 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2022-11-22 02:27:23,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:27:23,373 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2022-11-22 02:27:23,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-22 02:27:23,374 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:23,374 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1] [2022-11-22 02:27:23,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-22 02:27:23,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-22 02:27:23,575 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-22 02:27:23,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:23,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1692561772, now seen corresponding path program 11 times [2022-11-22 02:27:23,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:27:23,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539367432] [2022-11-22 02:27:23,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:23,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:27:23,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:24,200 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 25 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:24,200 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:27:24,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539367432] [2022-11-22 02:27:24,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539367432] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:27:24,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401551710] [2022-11-22 02:27:24,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:27:24,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:27:24,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:27:24,202 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:27:24,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-22 02:27:24,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-22 02:27:24,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:27:24,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-22 02:27:24,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:27:24,855 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 25 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:24,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:27:25,206 INFO L350 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 [2022-11-22 02:27:25,330 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 25 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:25,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401551710] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:27:25,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [944883055] [2022-11-22 02:27:25,332 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 02:27:25,332 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:27:25,332 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:27:25,332 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:27:25,332 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:27:25,355 INFO L350 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 8 treesize of output 7 [2022-11-22 02:27:25,389 INFO L350 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 [2022-11-22 02:27:25,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 02:27:25,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 02:27:25,611 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:27:27,324 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3243#(and (not (= (mod |ULTIMATE.start_cstrnlen_~maxlen#1| 4294967296) 0)) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.offset|) (<= 0 |#NULL.base|) (<= 1 |ULTIMATE.start_cstrnlen_~cp~0#1.offset|) (<= |ULTIMATE.start_cstrnlen_~maxlen#1| 2147483646) |ULTIMATE.start_cstrnlen_#t~short5#1| (<= 1 |ULTIMATE.start_cstrnlen_#in~maxlen#1|) (<= 0 |ULTIMATE.start_cstrnlen_#in~str#1.base|) (not (<= (+ |ULTIMATE.start_cstrnlen_~cp~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrnlen_~cp~0#1.base|))) (<= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= |ULTIMATE.start_cstrnlen_#in~maxlen#1| 2147483647) (<= |ULTIMATE.start_cstrnlen_#in~str#1.offset| 0) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrnlen_~str#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrnlen_~cp~0#1.base|) (<= 0 |ULTIMATE.start_cstrnlen_#in~str#1.offset|) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrnlen_~str#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrnlen_~str#1.base|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-22 02:27:27,324 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:27:27,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:27:27,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 37 [2022-11-22 02:27:27,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899006928] [2022-11-22 02:27:27,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:27:27,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-22 02:27:27,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:27:27,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-22 02:27:27,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1785, Unknown=0, NotChecked=0, Total=2070 [2022-11-22 02:27:27,326 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 39 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 38 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:27:27,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:27:27,805 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2022-11-22 02:27:27,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-22 02:27:27,807 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 38 states have internal predecessors, (112), 0 states have call successors, (0), 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 [2022-11-22 02:27:27,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:27:27,808 INFO L225 Difference]: With dead ends: 48 [2022-11-22 02:27:27,808 INFO L226 Difference]: Without dead ends: 48 [2022-11-22 02:27:27,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 87 SyntacticMatches, 7 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=519, Invalid=2451, Unknown=0, NotChecked=0, Total=2970 [2022-11-22 02:27:27,810 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 102 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:27:27,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 94 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:27:27,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-22 02:27:27,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-11-22 02:27:27,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 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) [2022-11-22 02:27:27,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2022-11-22 02:27:27,813 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 42 [2022-11-22 02:27:27,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:27:27,814 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2022-11-22 02:27:27,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 38 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:27:27,814 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2022-11-22 02:27:27,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-22 02:27:27,815 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:27,815 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 1, 1, 1, 1] [2022-11-22 02:27:27,827 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-22 02:27:28,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:27:28,021 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-22 02:27:28,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:28,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1673642829, now seen corresponding path program 12 times [2022-11-22 02:27:28,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:27:28,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057095620] [2022-11-22 02:27:28,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:28,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:27:28,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:28,707 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:28,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:27:28,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057095620] [2022-11-22 02:27:28,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057095620] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:27:28,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851117023] [2022-11-22 02:27:28,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:27:28,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:27:28,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:27:28,711 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:27:28,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-22 02:27:28,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:27:28,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:27:28,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-22 02:27:28,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:27:29,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 02:27:29,226 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:29,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:27:29,309 INFO L350 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 [2022-11-22 02:27:29,311 INFO L350 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 [2022-11-22 02:27:29,477 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:29,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851117023] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:27:29,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [733109001] [2022-11-22 02:27:29,479 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 02:27:29,479 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:27:29,479 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:27:29,480 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:27:29,480 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:27:29,505 INFO L350 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 8 treesize of output 7 [2022-11-22 02:27:29,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 02:27:29,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 02:27:29,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 02:27:29,749 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:27:31,556 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3665#(and (not (= (mod |ULTIMATE.start_cstrnlen_~maxlen#1| 4294967296) 0)) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.offset|) (<= 0 |#NULL.base|) (<= 1 |ULTIMATE.start_cstrnlen_~cp~0#1.offset|) (<= |ULTIMATE.start_cstrnlen_~maxlen#1| 2147483646) |ULTIMATE.start_cstrnlen_#t~short5#1| (<= 1 |ULTIMATE.start_cstrnlen_#in~maxlen#1|) (<= 0 |ULTIMATE.start_cstrnlen_#in~str#1.base|) (not (<= (+ |ULTIMATE.start_cstrnlen_~cp~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrnlen_~cp~0#1.base|))) (<= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= |ULTIMATE.start_cstrnlen_#in~maxlen#1| 2147483647) (<= |ULTIMATE.start_cstrnlen_#in~str#1.offset| 0) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrnlen_~str#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrnlen_~cp~0#1.base|) (<= 0 |ULTIMATE.start_cstrnlen_#in~str#1.offset|) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrnlen_~str#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrnlen_~str#1.base|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-22 02:27:31,556 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:27:31,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:27:31,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 31 [2022-11-22 02:27:31,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527323527] [2022-11-22 02:27:31,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:27:31,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-22 02:27:31,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:27:31,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-22 02:27:31,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1367, Unknown=0, NotChecked=0, Total=1482 [2022-11-22 02:27:31,559 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:27:32,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:27:32,336 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2022-11-22 02:27:32,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-22 02:27:32,337 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-11-22 02:27:32,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:27:32,338 INFO L225 Difference]: With dead ends: 79 [2022-11-22 02:27:32,338 INFO L226 Difference]: Without dead ends: 50 [2022-11-22 02:27:32,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 114 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=242, Invalid=2620, Unknown=0, NotChecked=0, Total=2862 [2022-11-22 02:27:32,340 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 117 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:27:32,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 274 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:27:32,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-22 02:27:32,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-11-22 02:27:32,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 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) [2022-11-22 02:27:32,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2022-11-22 02:27:32,343 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2022-11-22 02:27:32,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:27:32,344 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2022-11-22 02:27:32,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:27:32,344 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2022-11-22 02:27:32,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-22 02:27:32,345 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:32,345 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1] [2022-11-22 02:27:32,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-22 02:27:32,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:27:32,551 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-22 02:27:32,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:32,551 INFO L85 PathProgramCache]: Analyzing trace with hash -859518818, now seen corresponding path program 13 times [2022-11-22 02:27:32,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:27:32,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871818644] [2022-11-22 02:27:32,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:32,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:27:32,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:33,187 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 36 proven. 118 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:33,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:27:33,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871818644] [2022-11-22 02:27:33,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871818644] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:27:33,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456965293] [2022-11-22 02:27:33,188 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 02:27:33,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:27:33,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:27:33,191 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:27:33,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-22 02:27:33,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:33,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-22 02:27:33,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:27:33,616 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 36 proven. 118 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:33,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:27:33,981 INFO L350 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 [2022-11-22 02:27:34,130 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 36 proven. 118 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:34,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456965293] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:27:34,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [605830152] [2022-11-22 02:27:34,132 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 02:27:34,132 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:27:34,132 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:27:34,132 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:27:34,132 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:27:34,150 INFO L350 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 8 treesize of output 7 [2022-11-22 02:27:34,177 INFO L350 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 [2022-11-22 02:27:34,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 02:27:34,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 02:27:34,404 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:27:36,138 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4149#(and (not (= (mod |ULTIMATE.start_cstrnlen_~maxlen#1| 4294967296) 0)) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.offset|) (<= 0 |#NULL.base|) (<= 1 |ULTIMATE.start_cstrnlen_~cp~0#1.offset|) (<= |ULTIMATE.start_cstrnlen_~maxlen#1| 2147483646) |ULTIMATE.start_cstrnlen_#t~short5#1| (<= 1 |ULTIMATE.start_cstrnlen_#in~maxlen#1|) (<= 0 |ULTIMATE.start_cstrnlen_#in~str#1.base|) (not (<= (+ |ULTIMATE.start_cstrnlen_~cp~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrnlen_~cp~0#1.base|))) (<= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= |ULTIMATE.start_cstrnlen_#in~maxlen#1| 2147483647) (<= |ULTIMATE.start_cstrnlen_#in~str#1.offset| 0) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrnlen_~str#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrnlen_~cp~0#1.base|) (<= 0 |ULTIMATE.start_cstrnlen_#in~str#1.offset|) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrnlen_~str#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrnlen_~str#1.base|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-22 02:27:36,138 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:27:36,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:27:36,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 35 [2022-11-22 02:27:36,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224003557] [2022-11-22 02:27:36,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:27:36,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-22 02:27:36,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:27:36,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-22 02:27:36,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1658, Unknown=0, NotChecked=0, Total=1892 [2022-11-22 02:27:36,140 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 37 states, 36 states have (on average 2.8055555555555554) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:27:36,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:27:36,603 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2022-11-22 02:27:36,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-22 02:27:36,604 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.8055555555555554) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 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 48 [2022-11-22 02:27:36,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:27:36,604 INFO L225 Difference]: With dead ends: 54 [2022-11-22 02:27:36,605 INFO L226 Difference]: Without dead ends: 54 [2022-11-22 02:27:36,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 108 SyntacticMatches, 8 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=479, Invalid=2383, Unknown=0, NotChecked=0, Total=2862 [2022-11-22 02:27:36,606 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 207 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:27:36,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 165 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:27:36,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-22 02:27:36,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2022-11-22 02:27:36,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:27:36,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2022-11-22 02:27:36,610 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 48 [2022-11-22 02:27:36,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:27:36,611 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2022-11-22 02:27:36,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.8055555555555554) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:27:36,611 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2022-11-22 02:27:36,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-22 02:27:36,612 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:36,612 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 7, 7, 1, 1, 1, 1] [2022-11-22 02:27:36,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-22 02:27:36,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-22 02:27:36,820 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-22 02:27:36,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:36,820 INFO L85 PathProgramCache]: Analyzing trace with hash -681496193, now seen corresponding path program 14 times [2022-11-22 02:27:36,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:27:36,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010633909] [2022-11-22 02:27:36,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:36,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:27:36,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:37,617 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 24 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:37,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:27:37,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010633909] [2022-11-22 02:27:37,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010633909] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:27:37,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165625835] [2022-11-22 02:27:37,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:27:37,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:27:37,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:27:37,619 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:27:37,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-22 02:27:37,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-22 02:27:37,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:27:37,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-22 02:27:37,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:27:38,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 02:27:38,402 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 24 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:38,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:27:38,497 INFO L350 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 [2022-11-22 02:27:38,499 INFO L350 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 [2022-11-22 02:27:38,665 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 24 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:38,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165625835] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:27:38,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [952759304] [2022-11-22 02:27:38,667 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 02:27:38,667 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:27:38,667 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:27:38,667 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:27:38,668 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:27:38,685 INFO L350 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 8 treesize of output 7 [2022-11-22 02:27:38,712 INFO L350 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 [2022-11-22 02:27:38,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 02:27:38,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 02:27:38,946 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:27:40,787 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4624#(and (not (= (mod |ULTIMATE.start_cstrnlen_~maxlen#1| 4294967296) 0)) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.offset|) (<= 0 |#NULL.base|) (<= 1 |ULTIMATE.start_cstrnlen_~cp~0#1.offset|) (<= |ULTIMATE.start_cstrnlen_~maxlen#1| 2147483646) |ULTIMATE.start_cstrnlen_#t~short5#1| (<= 1 |ULTIMATE.start_cstrnlen_#in~maxlen#1|) (<= 0 |ULTIMATE.start_cstrnlen_#in~str#1.base|) (not (<= (+ |ULTIMATE.start_cstrnlen_~cp~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrnlen_~cp~0#1.base|))) (<= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= |ULTIMATE.start_cstrnlen_#in~maxlen#1| 2147483647) (<= |ULTIMATE.start_cstrnlen_#in~str#1.offset| 0) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrnlen_~str#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrnlen_~cp~0#1.base|) (<= 0 |ULTIMATE.start_cstrnlen_#in~str#1.offset|) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrnlen_~str#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrnlen_~str#1.base|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-22 02:27:40,788 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:27:40,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:27:40,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 34 [2022-11-22 02:27:40,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410364520] [2022-11-22 02:27:40,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:27:40,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-22 02:27:40,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:27:40,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-22 02:27:40,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1600, Unknown=0, NotChecked=0, Total=1722 [2022-11-22 02:27:40,790 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 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) [2022-11-22 02:27:41,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:27:41,705 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2022-11-22 02:27:41,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-22 02:27:41,707 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 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 52 [2022-11-22 02:27:41,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:27:41,708 INFO L225 Difference]: With dead ends: 89 [2022-11-22 02:27:41,708 INFO L226 Difference]: Without dead ends: 56 [2022-11-22 02:27:41,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 131 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=264, Invalid=3158, Unknown=0, NotChecked=0, Total=3422 [2022-11-22 02:27:41,710 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 101 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:27:41,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 360 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:27:41,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-22 02:27:41,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-11-22 02:27:41,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:27:41,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2022-11-22 02:27:41,713 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2022-11-22 02:27:41,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:27:41,714 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2022-11-22 02:27:41,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 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) [2022-11-22 02:27:41,714 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2022-11-22 02:27:41,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-22 02:27:41,715 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:41,715 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1] [2022-11-22 02:27:41,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-22 02:27:41,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:27:41,921 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-22 02:27:41,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:41,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1847932432, now seen corresponding path program 15 times [2022-11-22 02:27:41,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:27:41,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129960250] [2022-11-22 02:27:41,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:41,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:27:41,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:42,727 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 49 proven. 151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:42,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:27:42,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129960250] [2022-11-22 02:27:42,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129960250] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:27:42,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269563076] [2022-11-22 02:27:42,728 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:27:42,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:27:42,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:27:42,731 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:27:42,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-22 02:27:42,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:27:42,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:27:42,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-22 02:27:42,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:27:42,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:27:43,267 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 49 proven. 151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:43,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:27:44,085 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 49 proven. 151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:44,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269563076] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:27:44,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [802080602] [2022-11-22 02:27:44,087 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 02:27:44,087 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:27:44,087 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:27:44,088 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:27:44,088 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:27:44,115 INFO L350 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 8 treesize of output 7 [2022-11-22 02:27:44,138 INFO L350 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 [2022-11-22 02:27:44,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 02:27:44,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 02:27:44,398 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:27:46,292 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5177#(and (not (= (mod |ULTIMATE.start_cstrnlen_~maxlen#1| 4294967296) 0)) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.offset|) (<= 0 |#NULL.base|) (<= 1 |ULTIMATE.start_cstrnlen_~cp~0#1.offset|) (<= |ULTIMATE.start_cstrnlen_~maxlen#1| 2147483646) |ULTIMATE.start_cstrnlen_#t~short5#1| (<= 1 |ULTIMATE.start_cstrnlen_#in~maxlen#1|) (<= 0 |ULTIMATE.start_cstrnlen_#in~str#1.base|) (not (<= (+ |ULTIMATE.start_cstrnlen_~cp~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrnlen_~cp~0#1.base|))) (<= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= |ULTIMATE.start_cstrnlen_#in~maxlen#1| 2147483647) (<= |ULTIMATE.start_cstrnlen_#in~str#1.offset| 0) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrnlen_~str#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrnlen_~cp~0#1.base|) (<= 0 |ULTIMATE.start_cstrnlen_#in~str#1.offset|) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrnlen_~str#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrnlen_~str#1.base|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-22 02:27:46,292 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:27:46,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:27:46,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 48 [2022-11-22 02:27:46,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939743922] [2022-11-22 02:27:46,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:27:46,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-22 02:27:46,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:27:46,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-22 02:27:46,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=2798, Unknown=0, NotChecked=0, Total=3192 [2022-11-22 02:27:46,295 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 50 states, 49 states have (on average 2.673469387755102) internal successors, (131), 49 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:27:46,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:27:46,973 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2022-11-22 02:27:46,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-22 02:27:46,973 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 2.673469387755102) internal successors, (131), 49 states have internal predecessors, (131), 0 states have call successors, (0), 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 [2022-11-22 02:27:46,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:27:46,974 INFO L225 Difference]: With dead ends: 60 [2022-11-22 02:27:46,974 INFO L226 Difference]: Without dead ends: 60 [2022-11-22 02:27:46,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1342 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=790, Invalid=3766, Unknown=0, NotChecked=0, Total=4556 [2022-11-22 02:27:46,975 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 274 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:27:46,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 198 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:27:46,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-22 02:27:46,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-11-22 02:27:46,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 58 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) [2022-11-22 02:27:46,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2022-11-22 02:27:46,978 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 54 [2022-11-22 02:27:46,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:27:46,979 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2022-11-22 02:27:46,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 2.673469387755102) internal successors, (131), 49 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:27:46,979 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2022-11-22 02:27:46,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-22 02:27:46,980 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:46,980 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 8, 8, 1, 1, 1, 1] [2022-11-22 02:27:46,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-22 02:27:47,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-22 02:27:47,180 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-22 02:27:47,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:47,181 INFO L85 PathProgramCache]: Analyzing trace with hash -821455375, now seen corresponding path program 16 times [2022-11-22 02:27:47,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:27:47,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601080046] [2022-11-22 02:27:47,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:47,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:27:47,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:48,073 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 27 proven. 208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:48,073 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:27:48,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601080046] [2022-11-22 02:27:48,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601080046] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:27:48,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626369994] [2022-11-22 02:27:48,073 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 02:27:48,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:27:48,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:27:48,074 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:27:48,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-22 02:27:48,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:48,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-22 02:27:48,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:27:48,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 02:27:49,111 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 27 proven. 208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:49,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:27:49,279 INFO L350 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 [2022-11-22 02:27:49,283 INFO L350 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 24 treesize of output 20 [2022-11-22 02:27:50,024 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 27 proven. 208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:50,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626369994] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:27:50,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1017460713] [2022-11-22 02:27:50,026 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 02:27:50,026 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:27:50,026 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:27:50,026 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:27:50,027 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:27:50,044 INFO L350 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 8 treesize of output 7 [2022-11-22 02:27:50,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 02:27:50,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 02:27:50,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 02:27:50,293 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:27:52,394 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5723#(and (not (= (mod |ULTIMATE.start_cstrnlen_~maxlen#1| 4294967296) 0)) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.offset|) (<= 0 |#NULL.base|) (<= 1 |ULTIMATE.start_cstrnlen_~cp~0#1.offset|) (<= |ULTIMATE.start_cstrnlen_~maxlen#1| 2147483646) |ULTIMATE.start_cstrnlen_#t~short5#1| (<= 1 |ULTIMATE.start_cstrnlen_#in~maxlen#1|) (<= 0 |ULTIMATE.start_cstrnlen_#in~str#1.base|) (not (<= (+ |ULTIMATE.start_cstrnlen_~cp~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrnlen_~cp~0#1.base|))) (<= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= |ULTIMATE.start_cstrnlen_#in~maxlen#1| 2147483647) (<= |ULTIMATE.start_cstrnlen_#in~str#1.offset| 0) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrnlen_~str#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrnlen_~cp~0#1.base|) (<= 0 |ULTIMATE.start_cstrnlen_#in~str#1.offset|) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrnlen_~str#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrnlen_~str#1.base|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-22 02:27:52,395 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:27:52,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:27:52,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 55 [2022-11-22 02:27:52,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259010042] [2022-11-22 02:27:52,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:27:52,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-22 02:27:52,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:27:52,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-22 02:27:52,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=3711, Unknown=0, NotChecked=0, Total=3906 [2022-11-22 02:27:52,397 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 56 states, 56 states have (on average 2.4107142857142856) internal successors, (135), 55 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) [2022-11-22 02:27:53,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:27:53,757 INFO L93 Difference]: Finished difference Result 99 states and 100 transitions. [2022-11-22 02:27:53,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-22 02:27:53,758 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.4107142857142856) internal successors, (135), 55 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 58 [2022-11-22 02:27:53,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:27:53,758 INFO L225 Difference]: With dead ends: 99 [2022-11-22 02:27:53,758 INFO L226 Difference]: Without dead ends: 62 [2022-11-22 02:27:53,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1241 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=381, Invalid=6261, Unknown=0, NotChecked=0, Total=6642 [2022-11-22 02:27:53,762 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 119 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 1159 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 1170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:27:53,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 531 Invalid, 1170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1159 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 02:27:53,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-22 02:27:53,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2022-11-22 02:27:53,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:27:53,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2022-11-22 02:27:53,779 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2022-11-22 02:27:53,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:27:53,779 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2022-11-22 02:27:53,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.4107142857142856) internal successors, (135), 55 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) [2022-11-22 02:27:53,780 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2022-11-22 02:27:53,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-22 02:27:53,780 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:53,781 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1] [2022-11-22 02:27:53,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-22 02:27:53,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:27:53,986 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-22 02:27:53,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:53,987 INFO L85 PathProgramCache]: Analyzing trace with hash -769513022, now seen corresponding path program 17 times [2022-11-22 02:27:53,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:27:53,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945720327] [2022-11-22 02:27:53,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:53,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:27:54,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:54,917 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 64 proven. 188 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:54,917 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:27:54,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945720327] [2022-11-22 02:27:54,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945720327] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:27:54,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21845435] [2022-11-22 02:27:54,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:27:54,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:27:54,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:27:54,919 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:27:54,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-22 02:27:55,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-11-22 02:27:55,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:27:55,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-22 02:27:55,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:27:55,398 INFO L350 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 [2022-11-22 02:27:55,670 INFO L350 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 18 treesize of output 14 [2022-11-22 02:27:56,306 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:27:56,307 INFO L350 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 36 treesize of output 33 [2022-11-22 02:27:56,505 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2022-11-22 02:27:56,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:27:57,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-11-22 02:27:57,057 INFO L350 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 [2022-11-22 02:27:57,367 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 9 proven. 35 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2022-11-22 02:27:57,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21845435] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:27:57,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1248246306] [2022-11-22 02:27:57,368 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 02:27:57,368 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:27:57,369 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:27:57,369 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:27:57,369 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:27:57,392 INFO L350 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 8 treesize of output 7 [2022-11-22 02:27:57,414 INFO L350 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 [2022-11-22 02:27:57,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 02:27:57,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 02:27:57,618 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:27:59,468 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6314#(and (not (= (mod |ULTIMATE.start_cstrnlen_~maxlen#1| 4294967296) 0)) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.offset|) (<= 0 |#NULL.base|) (<= 1 |ULTIMATE.start_cstrnlen_~cp~0#1.offset|) (<= |ULTIMATE.start_cstrnlen_~maxlen#1| 2147483646) |ULTIMATE.start_cstrnlen_#t~short5#1| (<= 1 |ULTIMATE.start_cstrnlen_#in~maxlen#1|) (<= 0 |ULTIMATE.start_cstrnlen_#in~str#1.base|) (not (<= (+ |ULTIMATE.start_cstrnlen_~cp~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrnlen_~cp~0#1.base|))) (<= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= |ULTIMATE.start_cstrnlen_#in~maxlen#1| 2147483647) (<= |ULTIMATE.start_cstrnlen_#in~str#1.offset| 0) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrnlen_~str#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrnlen_~cp~0#1.base|) (<= 0 |ULTIMATE.start_cstrnlen_#in~str#1.offset|) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrnlen_~str#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrnlen_~str#1.base|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-22 02:27:59,468 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:27:59,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:27:59,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 5, 5] total 30 [2022-11-22 02:27:59,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442560871] [2022-11-22 02:27:59,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:27:59,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-22 02:27:59,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:27:59,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-22 02:27:59,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1329, Unknown=0, NotChecked=0, Total=1482 [2022-11-22 02:27:59,470 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 32 states, 31 states have (on average 2.903225806451613) internal successors, (90), 31 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) [2022-11-22 02:28:01,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:28:01,625 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2022-11-22 02:28:01,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-22 02:28:01,626 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.903225806451613) internal successors, (90), 31 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 [2022-11-22 02:28:01,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:28:01,626 INFO L225 Difference]: With dead ends: 61 [2022-11-22 02:28:01,626 INFO L226 Difference]: Without dead ends: 0 [2022-11-22 02:28:01,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=674, Invalid=2866, Unknown=0, NotChecked=0, Total=3540 [2022-11-22 02:28:01,627 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 281 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:28:01,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 194 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:28:01,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-22 02:28:01,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-22 02:28:01,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:28:01,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-22 02:28:01,628 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 60 [2022-11-22 02:28:01,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:28:01,628 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-22 02:28:01,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.903225806451613) internal successors, (90), 31 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) [2022-11-22 02:28:01,629 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-22 02:28:01,629 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-22 02:28:01,631 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 7 remaining) [2022-11-22 02:28:01,632 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2022-11-22 02:28:01,632 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2022-11-22 02:28:01,632 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-11-22 02:28:01,632 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2022-11-22 02:28:01,632 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 7 remaining) [2022-11-22 02:28:01,633 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-11-22 02:28:01,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-22 02:28:01,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:28:01,846 INFO L444 BasicCegarLoop]: Path program histogram: [17, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:28:01,848 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-22 02:28:01,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 02:28:01 BoogieIcfgContainer [2022-11-22 02:28:01,851 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-22 02:28:01,852 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-22 02:28:01,852 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-22 02:28:01,852 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-22 02:28:01,852 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:26:44" (3/4) ... [2022-11-22 02:28:01,855 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-22 02:28:01,868 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2022-11-22 02:28:01,869 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2022-11-22 02:28:01,869 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-11-22 02:28:01,870 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-22 02:28:01,915 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/witness.graphml [2022-11-22 02:28:01,915 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-22 02:28:01,916 INFO L158 Benchmark]: Toolchain (without parser) took 78703.53ms. Allocated memory was 119.5MB in the beginning and 318.8MB in the end (delta: 199.2MB). Free memory was 85.4MB in the beginning and 169.4MB in the end (delta: -84.0MB). Peak memory consumption was 116.2MB. Max. memory is 16.1GB. [2022-11-22 02:28:01,917 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 119.5MB. Free memory was 83.8MB in the beginning and 83.8MB in the end (delta: 27.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-22 02:28:01,917 INFO L158 Benchmark]: CACSL2BoogieTranslator took 426.63ms. Allocated memory is still 119.5MB. Free memory was 85.4MB in the beginning and 69.2MB in the end (delta: 16.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-22 02:28:01,918 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.02ms. Allocated memory is still 119.5MB. Free memory was 69.2MB in the beginning and 67.5MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-22 02:28:01,918 INFO L158 Benchmark]: Boogie Preprocessor took 26.84ms. Allocated memory is still 119.5MB. Free memory was 67.5MB in the beginning and 66.2MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-22 02:28:01,918 INFO L158 Benchmark]: RCFGBuilder took 560.57ms. Allocated memory is still 119.5MB. Free memory was 66.2MB in the beginning and 50.7MB in the end (delta: 15.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-22 02:28:01,918 INFO L158 Benchmark]: TraceAbstraction took 77577.65ms. Allocated memory was 119.5MB in the beginning and 318.8MB in the end (delta: 199.2MB). Free memory was 49.9MB in the beginning and 171.8MB in the end (delta: -121.9MB). Peak memory consumption was 78.4MB. Max. memory is 16.1GB. [2022-11-22 02:28:01,919 INFO L158 Benchmark]: Witness Printer took 63.98ms. Allocated memory is still 318.8MB. Free memory was 171.8MB in the beginning and 169.4MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-22 02:28:01,926 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 119.5MB. Free memory was 83.8MB in the beginning and 83.8MB in the end (delta: 27.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 426.63ms. Allocated memory is still 119.5MB. Free memory was 85.4MB in the beginning and 69.2MB in the end (delta: 16.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.02ms. Allocated memory is still 119.5MB. Free memory was 69.2MB in the beginning and 67.5MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 26.84ms. Allocated memory is still 119.5MB. Free memory was 67.5MB in the beginning and 66.2MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 560.57ms. Allocated memory is still 119.5MB. Free memory was 66.2MB in the beginning and 50.7MB in the end (delta: 15.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 77577.65ms. Allocated memory was 119.5MB in the beginning and 318.8MB in the end (delta: 199.2MB). Free memory was 49.9MB in the beginning and 171.8MB in the end (delta: -121.9MB). Peak memory consumption was 78.4MB. Max. memory is 16.1GB. * Witness Printer took 63.98ms. Allocated memory is still 318.8MB. Free memory was 171.8MB in the beginning and 169.4MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 521]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 77.5s, OverallIterations: 25, TraceHistogramMax: 10, PathProgramHistogramMax: 17, EmptinessCheckTime: 0.0s, AutomataDifference: 10.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2306 SdHoareTripleChecker+Valid, 4.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2306 mSDsluCounter, 2653 SdHoareTripleChecker+Invalid, 3.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2399 mSDsCounter, 132 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6416 IncrementalHoareTripleChecker+Invalid, 6548 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 132 mSolverCounterUnsat, 254 mSDtfsCounter, 6416 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2260 GetRequests, 1393 SyntacticMatches, 63 SemanticMatches, 804 ConstructedPredicates, 0 IntricatePredicates, 8 DeprecatedPredicates, 9864 ImplicationChecksByTransitivity, 46.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred in iteration=24, InterpolantAutomatonStates: 334, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 25 MinimizatonAttempts, 25 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 2.0s SatisfiabilityAnalysisTime, 22.9s InterpolantComputationTime, 1288 NumberOfCodeBlocks, 1288 NumberOfCodeBlocksAsserted, 80 NumberOfCheckSat, 1849 ConstructedInterpolants, 104 QuantifiedInterpolants, 19512 SizeOfPredicates, 233 NumberOfNonLiveVariables, 3531 ConjunctsInSsa, 758 ConjunctsInUnsatCore, 59 InterpolantComputations, 8 PerfectInterpolantSequences, 1308/5151 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-11-22 02:28:01,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99923319-46be-4a58-b24a-0da6ecd22353/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE