./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-memory-alloca/openbsd_cstrlcpy-alloca-2.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a0165632 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_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-memory-alloca/openbsd_cstrlcpy-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash f1ad2d5826e88851ec05294e79547a11a54665f4a2cf6f0e66f9eabed656148f --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 01:09:46,577 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 01:09:46,689 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2024-11-09 01:09:46,696 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 01:09:46,697 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 01:09:46,732 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 01:09:46,732 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 01:09:46,733 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 01:09:46,734 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 01:09:46,735 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 01:09:46,737 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 01:09:46,737 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 01:09:46,738 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 01:09:46,738 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 01:09:46,738 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 01:09:46,739 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 01:09:46,739 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 01:09:46,743 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 01:09:46,743 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 01:09:46,744 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 01:09:46,744 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 01:09:46,745 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 01:09:46,745 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 01:09:46,746 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 01:09:46,746 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 01:09:46,746 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 01:09:46,747 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 01:09:46,747 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 01:09:46,747 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 01:09:46,747 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 01:09:46,748 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 01:09:46,748 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 01:09:46,748 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 01:09:46,750 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 01:09:46,750 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 01:09:46,751 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 01:09:46,751 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 01:09:46,751 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 01:09:46,752 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 01:09:46,752 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 01:09:46,752 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 01:09:46,753 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 01:09:46,753 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 01:09:46,753 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 01:09:46,754 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 01:09:46,755 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 01:09:46,755 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1ad2d5826e88851ec05294e79547a11a54665f4a2cf6f0e66f9eabed656148f [2024-11-09 01:09:47,068 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 01:09:47,097 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 01:09:47,102 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 01:09:47,103 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 01:09:47,105 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 01:09:47,107 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/termination-memory-alloca/openbsd_cstrlcpy-alloca-2.i Unable to find full path for "g++" [2024-11-09 01:09:49,125 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 01:09:49,366 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 01:09:49,367 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/sv-benchmarks/c/termination-memory-alloca/openbsd_cstrlcpy-alloca-2.i [2024-11-09 01:09:49,380 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/data/1c1ffe0d7/2a2fd0c0bdcc4df49adf066d42a6f95c/FLAGdd0f7ad41 [2024-11-09 01:09:49,705 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/data/1c1ffe0d7/2a2fd0c0bdcc4df49adf066d42a6f95c [2024-11-09 01:09:49,708 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 01:09:49,709 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 01:09:49,711 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 01:09:49,711 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 01:09:49,720 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 01:09:49,721 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:09:49" (1/1) ... [2024-11-09 01:09:49,722 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73cc9fa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:09:49, skipping insertion in model container [2024-11-09 01:09:49,722 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:09:49" (1/1) ... [2024-11-09 01:09:49,774 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 01:09:50,139 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-09 01:09:50,140 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-09 01:09:50,144 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 01:09:50,158 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 01:09:50,211 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 01:09:50,241 INFO L204 MainTranslator]: Completed translation [2024-11-09 01:09:50,241 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:09:50 WrapperNode [2024-11-09 01:09:50,241 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 01:09:50,242 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 01:09:50,243 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 01:09:50,243 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 01:09:50,251 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:09:50" (1/1) ... [2024-11-09 01:09:50,265 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:09:50" (1/1) ... [2024-11-09 01:09:50,284 INFO L138 Inliner]: procedures = 111, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 77 [2024-11-09 01:09:50,286 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 01:09:50,286 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 01:09:50,288 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 01:09:50,289 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 01:09:50,298 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:09:50" (1/1) ... [2024-11-09 01:09:50,298 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:09:50" (1/1) ... [2024-11-09 01:09:50,302 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:09:50" (1/1) ... [2024-11-09 01:09:50,302 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:09:50" (1/1) ... [2024-11-09 01:09:50,308 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:09:50" (1/1) ... [2024-11-09 01:09:50,312 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:09:50" (1/1) ... [2024-11-09 01:09:50,313 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:09:50" (1/1) ... [2024-11-09 01:09:50,314 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:09:50" (1/1) ... [2024-11-09 01:09:50,316 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 01:09:50,317 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 01:09:50,317 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 01:09:50,318 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 01:09:50,318 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:09:50" (1/1) ... [2024-11-09 01:09:50,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 01:09:50,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:09:50,367 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 01:09:50,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 01:09:50,425 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 01:09:50,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 01:09:50,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 01:09:50,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 01:09:50,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 01:09:50,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 01:09:50,546 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 01:09:50,548 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 01:09:50,776 INFO L? ?]: Removed 55 outVars from TransFormulas that were not future-live. [2024-11-09 01:09:50,776 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 01:09:50,833 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 01:09:50,833 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-09 01:09:50,833 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:09:50 BoogieIcfgContainer [2024-11-09 01:09:50,834 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 01:09:50,836 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 01:09:50,836 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 01:09:50,839 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 01:09:50,839 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 01:09:49" (1/3) ... [2024-11-09 01:09:50,840 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ed4fb86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 01:09:50, skipping insertion in model container [2024-11-09 01:09:50,840 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:09:50" (2/3) ... [2024-11-09 01:09:50,844 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ed4fb86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 01:09:50, skipping insertion in model container [2024-11-09 01:09:50,844 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:09:50" (3/3) ... [2024-11-09 01:09:50,845 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrlcpy-alloca-2.i [2024-11-09 01:09:50,863 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 01:09:50,863 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2024-11-09 01:09:50,916 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 01:09:50,922 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1e0c7f1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 01:09:50,922 INFO L334 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2024-11-09 01:09:50,925 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 17 states have (on average 2.235294117647059) internal successors, (38), 30 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) [2024-11-09 01:09:50,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2024-11-09 01:09:50,931 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:09:50,931 INFO L215 NwaCegarLoop]: trace histogram [1, 1] [2024-11-09 01:09:50,931 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:09:50,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:09:50,936 INFO L85 PathProgramCache]: Analyzing trace with hash 3954, now seen corresponding path program 1 times [2024-11-09 01:09:50,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:09:50,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996744347] [2024-11-09 01:09:50,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:50,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:09:51,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:51,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:09:51,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:09:51,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996744347] [2024-11-09 01:09:51,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996744347] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:09:51,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:09:51,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 01:09:51,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478134506] [2024-11-09 01:09:51,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:09:51,267 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:09:51,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:09:51,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:09:51,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:09:51,299 INFO L87 Difference]: Start difference. First operand has 31 states, 17 states have (on average 2.235294117647059) internal successors, (38), 30 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) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:51,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:09:51,356 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2024-11-09 01:09:51,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:09:51,358 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2024-11-09 01:09:51,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:09:51,366 INFO L225 Difference]: With dead ends: 30 [2024-11-09 01:09:51,366 INFO L226 Difference]: Without dead ends: 29 [2024-11-09 01:09:51,368 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:09:51,374 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 3 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 01:09:51,375 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 46 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 01:09:51,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-09 01:09:51,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-11-09 01:09:51,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 2.0) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:51,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2024-11-09 01:09:51,411 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 2 [2024-11-09 01:09:51,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:09:51,411 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2024-11-09 01:09:51,411 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:51,412 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2024-11-09 01:09:51,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2024-11-09 01:09:51,412 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:09:51,412 INFO L215 NwaCegarLoop]: trace histogram [1, 1] [2024-11-09 01:09:51,413 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 01:09:51,414 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:09:51,415 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:09:51,415 INFO L85 PathProgramCache]: Analyzing trace with hash 3955, now seen corresponding path program 1 times [2024-11-09 01:09:51,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:09:51,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91940140] [2024-11-09 01:09:51,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:51,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:09:51,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:51,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:09:51,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:09:51,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91940140] [2024-11-09 01:09:51,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91940140] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:09:51,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:09:51,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 01:09:51,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32543527] [2024-11-09 01:09:51,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:09:51,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:09:51,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:09:51,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:09:51,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:09:51,845 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:51,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:09:51,880 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2024-11-09 01:09:51,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:09:51,881 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2024-11-09 01:09:51,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:09:51,882 INFO L225 Difference]: With dead ends: 28 [2024-11-09 01:09:51,882 INFO L226 Difference]: Without dead ends: 28 [2024-11-09 01:09:51,883 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:09:51,884 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 3 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 01:09:51,885 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 47 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 01:09:51,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-09 01:09:51,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-09 01:09:51,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:51,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2024-11-09 01:09:51,890 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 2 [2024-11-09 01:09:51,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:09:51,890 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2024-11-09 01:09:51,890 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:51,891 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2024-11-09 01:09:51,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-09 01:09:51,891 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:09:51,891 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-09 01:09:51,892 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 01:09:51,892 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:09:51,893 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:09:51,893 INFO L85 PathProgramCache]: Analyzing trace with hash 122563, now seen corresponding path program 1 times [2024-11-09 01:09:51,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:09:51,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694460987] [2024-11-09 01:09:51,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:51,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:09:51,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:51,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:09:51,963 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:09:51,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694460987] [2024-11-09 01:09:51,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694460987] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:09:51,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:09:51,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 01:09:51,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772915147] [2024-11-09 01:09:51,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:09:51,965 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:09:51,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:09:51,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:09:51,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:09:51,966 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:51,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:09:51,998 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2024-11-09 01:09:51,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:09:51,999 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2024-11-09 01:09:51,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:09:52,000 INFO L225 Difference]: With dead ends: 27 [2024-11-09 01:09:52,000 INFO L226 Difference]: Without dead ends: 27 [2024-11-09 01:09:52,001 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:09:52,002 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 01:09:52,003 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 01:09:52,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-09 01:09:52,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-09 01:09:52,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 26 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) [2024-11-09 01:09:52,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2024-11-09 01:09:52,007 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 3 [2024-11-09 01:09:52,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:09:52,007 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2024-11-09 01:09:52,008 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:52,008 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2024-11-09 01:09:52,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-09 01:09:52,008 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:09:52,008 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-09 01:09:52,009 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 01:09:52,009 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:09:52,010 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:09:52,010 INFO L85 PathProgramCache]: Analyzing trace with hash 122564, now seen corresponding path program 1 times [2024-11-09 01:09:52,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:09:52,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651751306] [2024-11-09 01:09:52,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:52,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:09:52,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:52,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:09:52,167 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:09:52,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651751306] [2024-11-09 01:09:52,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651751306] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:09:52,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:09:52,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 01:09:52,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318804589] [2024-11-09 01:09:52,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:09:52,169 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:09:52,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:09:52,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:09:52,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:09:52,170 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:52,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:09:52,204 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2024-11-09 01:09:52,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:09:52,205 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2024-11-09 01:09:52,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:09:52,205 INFO L225 Difference]: With dead ends: 26 [2024-11-09 01:09:52,205 INFO L226 Difference]: Without dead ends: 26 [2024-11-09 01:09:52,206 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:09:52,207 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 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 [2024-11-09 01:09:52,207 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 01:09:52,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-09 01:09:52,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-11-09 01:09:52,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:52,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2024-11-09 01:09:52,211 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 3 [2024-11-09 01:09:52,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:09:52,211 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2024-11-09 01:09:52,211 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:52,211 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2024-11-09 01:09:52,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 01:09:52,212 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:09:52,212 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:09:52,212 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 01:09:52,212 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:09:52,213 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:09:52,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1586544367, now seen corresponding path program 1 times [2024-11-09 01:09:52,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:09:52,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522998081] [2024-11-09 01:09:52,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:52,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:09:52,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:52,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:09:52,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:09:52,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522998081] [2024-11-09 01:09:52,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522998081] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:09:52,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:09:52,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 01:09:52,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916140712] [2024-11-09 01:09:52,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:09:52,292 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 01:09:52,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:09:52,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 01:09:52,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 01:09:52,293 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:52,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:09:52,353 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2024-11-09 01:09:52,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 01:09:52,354 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-09 01:09:52,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:09:52,355 INFO L225 Difference]: With dead ends: 31 [2024-11-09 01:09:52,356 INFO L226 Difference]: Without dead ends: 31 [2024-11-09 01:09:52,356 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 01:09:52,357 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 19 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:09:52,362 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 37 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:09:52,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-09 01:09:52,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2024-11-09 01:09:52,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 24 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) [2024-11-09 01:09:52,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2024-11-09 01:09:52,368 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 7 [2024-11-09 01:09:52,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:09:52,369 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2024-11-09 01:09:52,369 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:52,369 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2024-11-09 01:09:52,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 01:09:52,369 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:09:52,370 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:09:52,370 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 01:09:52,370 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:09:52,370 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:09:52,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1586544368, now seen corresponding path program 1 times [2024-11-09 01:09:52,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:09:52,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991419713] [2024-11-09 01:09:52,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:52,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:09:52,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:52,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:09:52,527 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:09:52,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991419713] [2024-11-09 01:09:52,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991419713] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:09:52,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:09:52,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 01:09:52,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153906359] [2024-11-09 01:09:52,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:09:52,529 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 01:09:52,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:09:52,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 01:09:52,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 01:09:52,530 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:52,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:09:52,593 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2024-11-09 01:09:52,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 01:09:52,594 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-09 01:09:52,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:09:52,595 INFO L225 Difference]: With dead ends: 36 [2024-11-09 01:09:52,596 INFO L226 Difference]: Without dead ends: 36 [2024-11-09 01:09:52,598 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 01:09:52,600 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:09:52,603 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 59 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:09:52,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-09 01:09:52,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2024-11-09 01:09:52,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 29 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) [2024-11-09 01:09:52,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2024-11-09 01:09:52,615 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 7 [2024-11-09 01:09:52,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:09:52,620 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2024-11-09 01:09:52,624 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:52,636 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2024-11-09 01:09:52,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 01:09:52,641 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:09:52,646 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:09:52,647 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 01:09:52,647 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:09:52,648 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:09:52,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1586569472, now seen corresponding path program 1 times [2024-11-09 01:09:52,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:09:52,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524949555] [2024-11-09 01:09:52,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:52,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:09:52,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:52,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:09:52,739 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:09:52,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524949555] [2024-11-09 01:09:52,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524949555] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:09:52,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:09:52,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 01:09:52,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043080477] [2024-11-09 01:09:52,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:09:52,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:09:52,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:09:52,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:09:52,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:09:52,742 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:52,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:09:52,769 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2024-11-09 01:09:52,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:09:52,770 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-09 01:09:52,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:09:52,771 INFO L225 Difference]: With dead ends: 31 [2024-11-09 01:09:52,771 INFO L226 Difference]: Without dead ends: 31 [2024-11-09 01:09:52,771 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:09:52,772 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 01:09:52,775 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 01:09:52,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-09 01:09:52,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-11-09 01:09:52,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:52,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2024-11-09 01:09:52,782 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 7 [2024-11-09 01:09:52,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:09:52,783 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2024-11-09 01:09:52,783 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:52,783 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2024-11-09 01:09:52,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 01:09:52,783 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:09:52,784 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:09:52,784 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 01:09:52,784 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:09:52,787 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:09:52,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1585774831, now seen corresponding path program 1 times [2024-11-09 01:09:52,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:09:52,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456263712] [2024-11-09 01:09:52,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:52,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:09:52,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:52,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:09:52,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:09:52,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456263712] [2024-11-09 01:09:52,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456263712] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:09:52,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:09:52,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 01:09:52,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63036911] [2024-11-09 01:09:52,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:09:52,948 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 01:09:52,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:09:52,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 01:09:52,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 01:09:52,949 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:53,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:09:53,009 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2024-11-09 01:09:53,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 01:09:53,010 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-09 01:09:53,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:09:53,010 INFO L225 Difference]: With dead ends: 30 [2024-11-09 01:09:53,010 INFO L226 Difference]: Without dead ends: 30 [2024-11-09 01:09:53,011 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 01:09:53,013 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 20 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 01:09:53,013 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 30 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 01:09:53,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-09 01:09:53,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-11-09 01:09:53,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 29 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) [2024-11-09 01:09:53,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2024-11-09 01:09:53,019 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 7 [2024-11-09 01:09:53,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:09:53,020 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2024-11-09 01:09:53,020 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:53,020 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2024-11-09 01:09:53,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 01:09:53,020 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:09:53,021 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:09:53,021 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-09 01:09:53,021 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:09:53,021 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:09:53,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1585774832, now seen corresponding path program 1 times [2024-11-09 01:09:53,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:09:53,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243917232] [2024-11-09 01:09:53,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:53,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:09:53,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:53,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:09:53,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:09:53,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243917232] [2024-11-09 01:09:53,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243917232] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:09:53,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:09:53,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 01:09:53,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192173506] [2024-11-09 01:09:53,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:09:53,242 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 01:09:53,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:09:53,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 01:09:53,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 01:09:53,247 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:53,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:09:53,316 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2024-11-09 01:09:53,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 01:09:53,318 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-09 01:09:53,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:09:53,319 INFO L225 Difference]: With dead ends: 33 [2024-11-09 01:09:53,319 INFO L226 Difference]: Without dead ends: 33 [2024-11-09 01:09:53,320 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 01:09:53,320 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 7 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:09:53,323 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 62 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:09:53,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-09 01:09:53,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2024-11-09 01:09:53,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 24 states have (on average 1.625) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:53,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2024-11-09 01:09:53,329 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 7 [2024-11-09 01:09:53,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:09:53,329 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2024-11-09 01:09:53,329 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:53,329 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2024-11-09 01:09:53,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-09 01:09:53,333 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:09:53,334 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:09:53,334 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-09 01:09:53,334 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:09:53,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:09:53,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1938240211, now seen corresponding path program 1 times [2024-11-09 01:09:53,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:09:53,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616151846] [2024-11-09 01:09:53,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:53,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:09:53,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:53,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:09:53,399 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:09:53,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616151846] [2024-11-09 01:09:53,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616151846] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:09:53,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:09:53,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 01:09:53,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322562942] [2024-11-09 01:09:53,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:09:53,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 01:09:53,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:09:53,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 01:09:53,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 01:09:53,402 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) 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) [2024-11-09 01:09:53,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:09:53,452 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2024-11-09 01:09:53,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 01:09:53,452 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) 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 [2024-11-09 01:09:53,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:09:53,453 INFO L225 Difference]: With dead ends: 30 [2024-11-09 01:09:53,453 INFO L226 Difference]: Without dead ends: 30 [2024-11-09 01:09:53,453 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 01:09:53,454 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 18 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 01:09:53,454 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 30 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 01:09:53,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-09 01:09:53,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-11-09 01:09:53,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 29 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) [2024-11-09 01:09:53,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2024-11-09 01:09:53,458 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 8 [2024-11-09 01:09:53,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:09:53,458 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2024-11-09 01:09:53,458 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) 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) [2024-11-09 01:09:53,458 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2024-11-09 01:09:53,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-09 01:09:53,459 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:09:53,459 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:09:53,459 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-09 01:09:53,459 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:09:53,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:09:53,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1938240212, now seen corresponding path program 1 times [2024-11-09 01:09:53,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:09:53,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2220086] [2024-11-09 01:09:53,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:53,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:09:53,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:53,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:09:53,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:09:53,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2220086] [2024-11-09 01:09:53,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2220086] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:09:53,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:09:53,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 01:09:53,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401530531] [2024-11-09 01:09:53,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:09:53,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 01:09:53,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:09:53,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 01:09:53,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 01:09:53,649 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 5 states, 4 states have (on average 2.0) 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) [2024-11-09 01:09:53,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:09:53,712 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2024-11-09 01:09:53,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 01:09:53,712 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) 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 [2024-11-09 01:09:53,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:09:53,713 INFO L225 Difference]: With dead ends: 33 [2024-11-09 01:09:53,713 INFO L226 Difference]: Without dead ends: 33 [2024-11-09 01:09:53,713 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 01:09:53,714 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 6 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:09:53,714 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 58 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:09:53,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-09 01:09:53,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2024-11-09 01:09:53,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:53,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2024-11-09 01:09:53,719 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 8 [2024-11-09 01:09:53,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:09:53,720 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2024-11-09 01:09:53,720 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) 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) [2024-11-09 01:09:53,720 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2024-11-09 01:09:53,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-09 01:09:53,720 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:09:53,721 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:09:53,721 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-09 01:09:53,721 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:09:53,721 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:09:53,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1914379513, now seen corresponding path program 1 times [2024-11-09 01:09:53,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:09:53,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916725989] [2024-11-09 01:09:53,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:53,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:09:53,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:53,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:09:53,812 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:09:53,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916725989] [2024-11-09 01:09:53,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916725989] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:09:53,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:09:53,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 01:09:53,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578073566] [2024-11-09 01:09:53,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:09:53,813 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 01:09:53,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:09:53,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 01:09:53,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 01:09:53,814 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 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) [2024-11-09 01:09:53,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:09:53,872 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2024-11-09 01:09:53,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 01:09:53,873 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 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 [2024-11-09 01:09:53,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:09:53,873 INFO L225 Difference]: With dead ends: 38 [2024-11-09 01:09:53,874 INFO L226 Difference]: Without dead ends: 38 [2024-11-09 01:09:53,874 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 01:09:53,875 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 18 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 01:09:53,875 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 47 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 01:09:53,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-09 01:09:53,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2024-11-09 01:09:53,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.5) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:53,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2024-11-09 01:09:53,878 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 8 [2024-11-09 01:09:53,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:09:53,878 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2024-11-09 01:09:53,878 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 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) [2024-11-09 01:09:53,878 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2024-11-09 01:09:53,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-09 01:09:53,879 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:09:53,879 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:09:53,879 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-09 01:09:53,880 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:09:53,880 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:09:53,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1914379514, now seen corresponding path program 1 times [2024-11-09 01:09:53,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:09:53,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775298424] [2024-11-09 01:09:53,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:53,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:09:53,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:54,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:09:54,002 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:09:54,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775298424] [2024-11-09 01:09:54,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775298424] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:09:54,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:09:54,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 01:09:54,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842252460] [2024-11-09 01:09:54,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:09:54,003 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 01:09:54,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:09:54,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 01:09:54,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 01:09:54,004 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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) [2024-11-09 01:09:54,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:09:54,075 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2024-11-09 01:09:54,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 01:09:54,076 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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 [2024-11-09 01:09:54,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:09:54,076 INFO L225 Difference]: With dead ends: 39 [2024-11-09 01:09:54,076 INFO L226 Difference]: Without dead ends: 39 [2024-11-09 01:09:54,077 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 01:09:54,077 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 11 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:09:54,078 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 72 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:09:54,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-09 01:09:54,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2024-11-09 01:09:54,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:54,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2024-11-09 01:09:54,081 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 8 [2024-11-09 01:09:54,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:09:54,081 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2024-11-09 01:09:54,081 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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) [2024-11-09 01:09:54,081 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2024-11-09 01:09:54,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-09 01:09:54,082 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:09:54,082 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:09:54,082 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-09 01:09:54,082 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:09:54,083 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:09:54,083 INFO L85 PathProgramCache]: Analyzing trace with hash -783792842, now seen corresponding path program 1 times [2024-11-09 01:09:54,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:09:54,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426775145] [2024-11-09 01:09:54,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:54,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:09:54,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:54,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:09:54,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:09:54,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426775145] [2024-11-09 01:09:54,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426775145] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:09:54,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:09:54,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 01:09:54,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98337537] [2024-11-09 01:09:54,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:09:54,242 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 01:09:54,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:09:54,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 01:09:54,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 01:09:54,242 INFO L87 Difference]: Start difference. First operand 32 states and 40 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) [2024-11-09 01:09:54,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:09:54,270 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2024-11-09 01:09:54,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 01:09:54,270 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 [2024-11-09 01:09:54,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:09:54,271 INFO L225 Difference]: With dead ends: 31 [2024-11-09 01:09:54,271 INFO L226 Difference]: Without dead ends: 29 [2024-11-09 01:09:54,271 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 01:09:54,272 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 01:09:54,272 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 36 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 01:09:54,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-09 01:09:54,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2024-11-09 01:09:54,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 27 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:54,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2024-11-09 01:09:54,277 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 9 [2024-11-09 01:09:54,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:09:54,278 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2024-11-09 01:09:54,278 INFO L472 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) [2024-11-09 01:09:54,278 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2024-11-09 01:09:54,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-09 01:09:54,278 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:09:54,278 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:09:54,279 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-09 01:09:54,279 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:09:54,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:09:54,279 INFO L85 PathProgramCache]: Analyzing trace with hash 573841915, now seen corresponding path program 1 times [2024-11-09 01:09:54,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:09:54,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349591517] [2024-11-09 01:09:54,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:54,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:09:54,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:54,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 01:09:54,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:09:54,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349591517] [2024-11-09 01:09:54,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349591517] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:09:54,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:09:54,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 01:09:54,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563248161] [2024-11-09 01:09:54,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:09:54,519 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 01:09:54,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:09:54,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 01:09:54,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 01:09:54,520 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 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) [2024-11-09 01:09:54,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:09:54,569 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2024-11-09 01:09:54,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 01:09:54,569 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 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 11 [2024-11-09 01:09:54,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:09:54,579 INFO L225 Difference]: With dead ends: 28 [2024-11-09 01:09:54,579 INFO L226 Difference]: Without dead ends: 28 [2024-11-09 01:09:54,580 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 01:09:54,580 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 2 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 01:09:54,581 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 57 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 01:09:54,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-09 01:09:54,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-09 01:09:54,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.375) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:54,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2024-11-09 01:09:54,587 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 11 [2024-11-09 01:09:54,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:09:54,587 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2024-11-09 01:09:54,587 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 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) [2024-11-09 01:09:54,587 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2024-11-09 01:09:54,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-09 01:09:54,588 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:09:54,588 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:09:54,588 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-09 01:09:54,588 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:09:54,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:09:54,589 INFO L85 PathProgramCache]: Analyzing trace with hash -2065154362, now seen corresponding path program 1 times [2024-11-09 01:09:54,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:09:54,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196596830] [2024-11-09 01:09:54,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:54,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:09:54,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:54,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:09:54,941 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:09:54,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196596830] [2024-11-09 01:09:54,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196596830] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:09:54,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:09:54,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 01:09:54,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838419749] [2024-11-09 01:09:54,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:09:54,943 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 01:09:54,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:09:54,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 01:09:54,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-09 01:09:54,944 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:55,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:09:55,041 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2024-11-09 01:09:55,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 01:09:55,042 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-09 01:09:55,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:09:55,043 INFO L225 Difference]: With dead ends: 38 [2024-11-09 01:09:55,043 INFO L226 Difference]: Without dead ends: 38 [2024-11-09 01:09:55,043 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-09 01:09:55,044 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 8 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:09:55,044 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 77 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:09:55,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-09 01:09:55,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2024-11-09 01:09:55,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 30 states have (on average 1.4) internal successors, (42), 33 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) [2024-11-09 01:09:55,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2024-11-09 01:09:55,048 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 12 [2024-11-09 01:09:55,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:09:55,048 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2024-11-09 01:09:55,048 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:55,048 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2024-11-09 01:09:55,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-09 01:09:55,049 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:09:55,049 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:09:55,049 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-09 01:09:55,049 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:09:55,049 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:09:55,050 INFO L85 PathProgramCache]: Analyzing trace with hash -2065119541, now seen corresponding path program 1 times [2024-11-09 01:09:55,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:09:55,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178521808] [2024-11-09 01:09:55,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:55,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:09:55,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:55,575 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:09:55,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:09:55,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178521808] [2024-11-09 01:09:55,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178521808] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:09:55,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294518854] [2024-11-09 01:09:55,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:55,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:09:55,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:09:55,579 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:09:55,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 01:09:55,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:55,678 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-09 01:09:55,683 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:09:55,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-09 01:09:56,011 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:09:56,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 17 [2024-11-09 01:09:56,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:09:56,148 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:09:56,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-09 01:09:56,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-11-09 01:09:56,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 01:09:56,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:09:56,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294518854] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:09:56,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1953214960] [2024-11-09 01:09:56,492 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 01:09:56,492 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:09:56,497 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:09:56,502 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:09:56,502 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:09:59,224 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:10:02,158 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1178#(and (= |ULTIMATE.start_cstrlcpy_~d~0#1.offset| (+ |ULTIMATE.start_cstrlcpy_#t~post3#1.offset| 1)) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_19| Int)) (and (not (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_19| 18446744073709551616) 0)) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_19| Int) (|v_#memory_int_24| (Array Int (Array Int Int))) (|v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_20| Int)) (and (= |#memory_int| (store |v_#memory_int_24| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_20| (store (select |v_#memory_int_24| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_20|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_19| (select (select |#memory_int| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_20|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_19|)))) (<= 1 |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) (<= 1 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_19|) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_20|) 1) (<= 2 |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_20|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_20|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_19|) 0)) (<= 2 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 2 |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (<= (+ |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_19| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_20|)) (<= 2 |ULTIMATE.start_cstrlcpy_~s~0#1.base|))) (= |ULTIMATE.start_cstrlcpy_~n~0#1| |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_19|))) (= |ULTIMATE.start_cstrlcpy_~d~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (<= (+ (select |#length| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|))' at error location [2024-11-09 01:10:02,159 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:10:02,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:10:02,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2024-11-09 01:10:02,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846917997] [2024-11-09 01:10:02,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:10:02,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 01:10:02,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:10:02,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 01:10:02,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=657, Unknown=7, NotChecked=0, Total=756 [2024-11-09 01:10:02,162 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:10:02,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:10:02,516 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2024-11-09 01:10:02,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 01:10:02,517 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-09 01:10:02,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:10:02,518 INFO L225 Difference]: With dead ends: 39 [2024-11-09 01:10:02,518 INFO L226 Difference]: Without dead ends: 39 [2024-11-09 01:10:02,518 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=107, Invalid=756, Unknown=7, NotChecked=0, Total=870 [2024-11-09 01:10:02,519 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 36 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 01:10:02,519 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 144 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 01:10:02,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-09 01:10:02,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2024-11-09 01:10:02,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 34 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:10:02,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2024-11-09 01:10:02,526 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 12 [2024-11-09 01:10:02,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:10:02,526 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2024-11-09 01:10:02,527 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:10:02,527 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2024-11-09 01:10:02,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 01:10:02,528 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:10:02,528 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:10:02,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 01:10:02,733 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 01:10:02,734 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:10:02,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:10:02,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1605516081, now seen corresponding path program 1 times [2024-11-09 01:10:02,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:10:02,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437925951] [2024-11-09 01:10:02,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:02,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:10:02,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:02,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 01:10:02,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:10:02,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437925951] [2024-11-09 01:10:02,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437925951] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:10:02,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:10:02,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 01:10:02,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489704686] [2024-11-09 01:10:02,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:10:02,873 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 01:10:02,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:10:02,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 01:10:02,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 01:10:02,874 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:10:02,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:10:02,905 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2024-11-09 01:10:02,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 01:10:02,906 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-09 01:10:02,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:10:02,906 INFO L225 Difference]: With dead ends: 35 [2024-11-09 01:10:02,906 INFO L226 Difference]: Without dead ends: 35 [2024-11-09 01:10:02,906 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 01:10:02,907 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 8 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 46 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 [2024-11-09 01:10:02,907 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 46 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 01:10:02,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-09 01:10:02,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-11-09 01:10:02,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:10:02,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2024-11-09 01:10:02,913 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 13 [2024-11-09 01:10:02,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:10:02,914 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2024-11-09 01:10:02,914 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:10:02,914 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2024-11-09 01:10:02,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 01:10:02,914 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:10:02,914 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:10:02,915 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-09 01:10:02,915 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:10:02,915 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:10:02,915 INFO L85 PathProgramCache]: Analyzing trace with hash 405803647, now seen corresponding path program 1 times [2024-11-09 01:10:02,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:10:02,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628866024] [2024-11-09 01:10:02,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:02,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:10:02,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:03,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:10:03,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:10:03,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628866024] [2024-11-09 01:10:03,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628866024] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:10:03,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266329992] [2024-11-09 01:10:03,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:03,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:10:03,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:10:03,304 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:10:03,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 01:10:03,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:03,393 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-09 01:10:03,395 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:10:03,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:10:03,653 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:10:03,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 45 [2024-11-09 01:10:03,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:10:03,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266329992] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:10:03,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1810137497] [2024-11-09 01:10:03,974 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 01:10:03,974 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:10:03,976 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:10:03,977 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:10:03,977 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:10:06,120 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:10:08,541 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1434#(and (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_29| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_29| Int)) (and (<= 2 |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_29|) (<= 1 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 1 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_29|) (<= 2 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_29|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_29|) (<= 2 |ULTIMATE.start_cstrlcpy_~s~0#1.base|))))' at error location [2024-11-09 01:10:08,541 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:10:08,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:10:08,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2024-11-09 01:10:08,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809954009] [2024-11-09 01:10:08,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:10:08,542 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-09 01:10:08,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:10:08,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-09 01:10:08,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=822, Unknown=5, NotChecked=0, Total=930 [2024-11-09 01:10:08,546 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 22 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 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) [2024-11-09 01:10:08,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:10:08,829 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2024-11-09 01:10:08,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 01:10:08,830 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 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) Word has length 13 [2024-11-09 01:10:08,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:10:08,830 INFO L225 Difference]: With dead ends: 36 [2024-11-09 01:10:08,830 INFO L226 Difference]: Without dead ends: 36 [2024-11-09 01:10:08,831 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=136, Invalid=1049, Unknown=5, NotChecked=0, Total=1190 [2024-11-09 01:10:08,832 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 9 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 01:10:08,832 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 108 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 01:10:08,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-09 01:10:08,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-11-09 01:10:08,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 32 states have (on average 1.28125) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:10:08,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2024-11-09 01:10:08,834 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 13 [2024-11-09 01:10:08,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:10:08,834 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2024-11-09 01:10:08,835 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 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) [2024-11-09 01:10:08,835 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2024-11-09 01:10:08,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-09 01:10:08,835 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:10:08,835 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:10:08,856 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 01:10:09,039 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:10:09,040 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:10:09,043 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:10:09,043 INFO L85 PathProgramCache]: Analyzing trace with hash -2141317752, now seen corresponding path program 1 times [2024-11-09 01:10:09,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:10:09,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894271624] [2024-11-09 01:10:09,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:09,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:10:09,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:09,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:10:09,473 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:10:09,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894271624] [2024-11-09 01:10:09,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894271624] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:10:09,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553355442] [2024-11-09 01:10:09,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:09,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:10:09,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:10:09,475 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:10:09,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 01:10:09,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:09,550 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-09 01:10:09,552 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:10:09,559 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 01:10:09,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-09 01:10:09,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 14 [2024-11-09 01:10:09,927 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:10:09,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 17 [2024-11-09 01:10:10,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:10:10,014 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:10:10,318 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:10:10,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2024-11-09 01:10:10,332 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:10:10,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 34 [2024-11-09 01:10:10,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 01:10:10,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 01:10:10,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:10:10,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553355442] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:10:10,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [780541188] [2024-11-09 01:10:10,410 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-09 01:10:10,410 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:10:10,410 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:10:10,410 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:10:10,410 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:10:11,088 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:10:13,442 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1624#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= (+ (select |#length| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 2 |ULTIMATE.start_cstrlcpy_~s~0#1.base|))' at error location [2024-11-09 01:10:13,442 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:10:13,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:10:13,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2024-11-09 01:10:13,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705482584] [2024-11-09 01:10:13,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:10:13,443 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-09 01:10:13,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:10:13,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-09 01:10:13,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1009, Unknown=11, NotChecked=0, Total=1190 [2024-11-09 01:10:13,444 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 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) [2024-11-09 01:10:13,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:10:13,775 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2024-11-09 01:10:13,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 01:10:13,775 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 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) Word has length 14 [2024-11-09 01:10:13,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:10:13,776 INFO L225 Difference]: With dead ends: 39 [2024-11-09 01:10:13,776 INFO L226 Difference]: Without dead ends: 39 [2024-11-09 01:10:13,777 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=215, Invalid=1256, Unknown=11, NotChecked=0, Total=1482 [2024-11-09 01:10:13,777 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:10:13,777 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 111 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:10:13,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-09 01:10:13,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-11-09 01:10:13,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:10:13,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2024-11-09 01:10:13,780 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 14 [2024-11-09 01:10:13,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:10:13,780 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2024-11-09 01:10:13,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 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) [2024-11-09 01:10:13,780 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2024-11-09 01:10:13,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-09 01:10:13,781 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:10:13,781 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:10:13,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 01:10:13,987 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:10:13,988 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:10:13,988 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:10:13,988 INFO L85 PathProgramCache]: Analyzing trace with hash -338450937, now seen corresponding path program 1 times [2024-11-09 01:10:13,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:10:13,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680787310] [2024-11-09 01:10:13,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:13,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:10:14,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:14,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:10:14,273 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:10:14,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680787310] [2024-11-09 01:10:14,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680787310] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:10:14,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:10:14,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 01:10:14,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925689075] [2024-11-09 01:10:14,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:10:14,274 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 01:10:14,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:10:14,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 01:10:14,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-09 01:10:14,275 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:10:14,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:10:14,303 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2024-11-09 01:10:14,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 01:10:14,303 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-09 01:10:14,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:10:14,304 INFO L225 Difference]: With dead ends: 41 [2024-11-09 01:10:14,304 INFO L226 Difference]: Without dead ends: 39 [2024-11-09 01:10:14,304 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-09 01:10:14,305 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 3 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 01:10:14,305 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 48 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 01:10:14,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-09 01:10:14,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-11-09 01:10:14,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.2) internal successors, (42), 38 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) [2024-11-09 01:10:14,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2024-11-09 01:10:14,307 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 14 [2024-11-09 01:10:14,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:10:14,308 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2024-11-09 01:10:14,308 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:10:14,308 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2024-11-09 01:10:14,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-09 01:10:14,308 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:10:14,308 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:10:14,309 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-09 01:10:14,309 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:10:14,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:10:14,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1075637566, now seen corresponding path program 1 times [2024-11-09 01:10:14,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:10:14,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789980171] [2024-11-09 01:10:14,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:14,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:10:14,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:14,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:10:14,638 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:10:14,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789980171] [2024-11-09 01:10:14,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789980171] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:10:14,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963186710] [2024-11-09 01:10:14,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:14,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:10:14,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:10:14,641 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:10:14,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 01:10:14,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:14,736 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-09 01:10:14,737 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:10:14,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-09 01:10:14,903 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:10:14,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 17 [2024-11-09 01:10:15,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:10:15,032 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:10:15,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-09 01:10:15,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-11-09 01:10:15,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 01:10:15,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:10:15,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963186710] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:10:15,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1163508931] [2024-11-09 01:10:15,303 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-09 01:10:15,303 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:10:15,303 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:10:15,304 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:10:15,304 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:10:16,710 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:10:21,079 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1918#(and (exists ((|v_ULTIMATE.start_cstrlcpy_~siz#1_15| Int)) (not (= (mod |v_ULTIMATE.start_cstrlcpy_~siz#1_15| 18446744073709551616) 0))) (exists ((|v_#memory_int_53| (Array Int (Array Int Int))) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.base_39| Int) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_37| Int)) (and (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_39|) 1) (<= 0 |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_37|) (<= (+ |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_37| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_39|)) (= |#memory_int| (store |v_#memory_int_53| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_39| (store (select |v_#memory_int_53| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_39|) |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_37| 0))))) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrlcpy_~n~0#1_42| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_~n~0#1_42| 18446744073709551616) 0)) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_39| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_39| 18446744073709551616) 0)) (or (< (select |#length| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (< |ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)))' at error location [2024-11-09 01:10:21,079 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:10:21,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:10:21,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2024-11-09 01:10:21,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020861541] [2024-11-09 01:10:21,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:10:21,080 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 01:10:21,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:10:21,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 01:10:21,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=817, Unknown=4, NotChecked=0, Total=930 [2024-11-09 01:10:21,081 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 19 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:10:21,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:10:21,299 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2024-11-09 01:10:21,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 01:10:21,300 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 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 [2024-11-09 01:10:21,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:10:21,301 INFO L225 Difference]: With dead ends: 41 [2024-11-09 01:10:21,301 INFO L226 Difference]: Without dead ends: 41 [2024-11-09 01:10:21,301 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=118, Invalid=870, Unknown=4, NotChecked=0, Total=992 [2024-11-09 01:10:21,302 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 01:10:21,302 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 106 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 01:10:21,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-09 01:10:21,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2024-11-09 01:10:21,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.2) internal successors, (42), 38 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) [2024-11-09 01:10:21,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2024-11-09 01:10:21,304 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 16 [2024-11-09 01:10:21,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:10:21,305 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2024-11-09 01:10:21,305 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:10:21,305 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2024-11-09 01:10:21,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-09 01:10:21,305 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:10:21,305 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:10:21,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 01:10:21,506 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:10:21,506 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:10:21,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:10:21,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1152111303, now seen corresponding path program 2 times [2024-11-09 01:10:21,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:10:21,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970185995] [2024-11-09 01:10:21,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:21,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:10:21,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:22,259 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:10:22,259 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:10:22,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970185995] [2024-11-09 01:10:22,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970185995] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:10:22,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746859772] [2024-11-09 01:10:22,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 01:10:22,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:10:22,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:10:22,262 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:10:22,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 01:10:22,375 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 01:10:22,375 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:10:22,377 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-09 01:10:22,380 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:10:22,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 01:10:22,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-09 01:10:22,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 01:10:22,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-11-09 01:10:22,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2024-11-09 01:10:23,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 01:10:23,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 01:10:23,243 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:10:23,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 24 [2024-11-09 01:10:23,445 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:10:23,446 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:10:24,247 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:10:24,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2024-11-09 01:10:24,251 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 01:10:24,268 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:10:24,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 63 [2024-11-09 01:10:24,274 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 01:10:24,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-11-09 01:10:24,305 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:10:24,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 34 [2024-11-09 01:10:24,310 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 01:10:24,314 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 01:10:24,331 INFO L349 Elim1Store]: treesize reduction 10, result has 47.4 percent of original size [2024-11-09 01:10:24,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 19 [2024-11-09 01:10:24,446 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:10:24,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746859772] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:10:24,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1724590054] [2024-11-09 01:10:24,448 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-09 01:10:24,448 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:10:24,448 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:10:24,449 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:10:24,449 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:10:25,149 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:10:27,831 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2140#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= (+ (select |#length| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 2 |ULTIMATE.start_cstrlcpy_~s~0#1.base|))' at error location [2024-11-09 01:10:27,831 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:10:27,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:10:27,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2024-11-09 01:10:27,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820669011] [2024-11-09 01:10:27,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:10:27,832 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-09 01:10:27,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:10:27,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-09 01:10:27,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1623, Unknown=9, NotChecked=0, Total=1892 [2024-11-09 01:10:27,833 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 32 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 31 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:10:28,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:10:28,741 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2024-11-09 01:10:28,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 01:10:28,742 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 31 states have internal predecessors, (51), 0 states have call successors, (0), 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 17 [2024-11-09 01:10:28,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:10:28,742 INFO L225 Difference]: With dead ends: 44 [2024-11-09 01:10:28,742 INFO L226 Difference]: Without dead ends: 33 [2024-11-09 01:10:28,743 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=375, Invalid=2372, Unknown=9, NotChecked=0, Total=2756 [2024-11-09 01:10:28,743 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 01:10:28,743 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 105 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 01:10:28,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-09 01:10:28,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-11-09 01:10:28,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 29 states have (on average 1.206896551724138) internal successors, (35), 32 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:10:28,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2024-11-09 01:10:28,745 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 17 [2024-11-09 01:10:28,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:10:28,745 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2024-11-09 01:10:28,745 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 31 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:10:28,745 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2024-11-09 01:10:28,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-09 01:10:28,746 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:10:28,746 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-09 01:10:28,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 01:10:28,946 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:10:28,947 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:10:28,947 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:10:28,947 INFO L85 PathProgramCache]: Analyzing trace with hash -2066910768, now seen corresponding path program 2 times [2024-11-09 01:10:28,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:10:28,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380386956] [2024-11-09 01:10:28,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:28,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:10:28,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:29,608 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:10:29,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:10:29,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380386956] [2024-11-09 01:10:29,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380386956] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:10:29,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036860443] [2024-11-09 01:10:29,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 01:10:29,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:10:29,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:10:29,611 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:10:29,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 01:10:29,718 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 01:10:29,718 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:10:29,720 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-09 01:10:29,722 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:10:29,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 01:10:29,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-09 01:10:29,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 19 [2024-11-09 01:10:32,249 INFO L349 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2024-11-09 01:10:32,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 35 [2024-11-09 01:10:32,425 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:10:32,426 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:10:33,158 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:10:33,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 36 [2024-11-09 01:10:33,185 INFO L349 Elim1Store]: treesize reduction 17, result has 54.1 percent of original size [2024-11-09 01:10:33,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 31 [2024-11-09 01:10:33,203 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 01:10:33,218 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:10:33,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 47 [2024-11-09 01:10:33,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 01:10:33,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 01:10:33,327 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:10:33,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036860443] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:10:33,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [909730980] [2024-11-09 01:10:33,329 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 01:10:33,329 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:10:33,329 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:10:33,329 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:10:33,329 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:10:34,792 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:10:37,635 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2374#(and (= |ULTIMATE.start_cstrlcpy_~d~0#1.offset| (+ |ULTIMATE.start_cstrlcpy_#t~post3#1.offset| 1)) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_52| Int)) (and (= |ULTIMATE.start_cstrlcpy_~n~0#1| |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_52|) (exists ((|v_#memory_int_73| (Array Int (Array Int Int))) (|v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_49| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_48| Int)) (and (<= 1 |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) (<= 1 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= (+ |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_48| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_49|)) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_49|) 1) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_49|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_48|) 0)) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_49|) (<= 2 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 2 |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (<= 0 |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_48|) (<= 2 |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (= |#memory_int| (store |v_#memory_int_73| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_49| (store (select |v_#memory_int_73| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_49|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_48| (select (select |#memory_int| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_49|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_48|)))))) (not (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_52| 18446744073709551616) 0)))) (= |ULTIMATE.start_cstrlcpy_~d~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (<= (+ (select |#length| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|))' at error location [2024-11-09 01:10:37,636 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:10:37,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:10:37,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2024-11-09 01:10:37,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979889286] [2024-11-09 01:10:37,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:10:37,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-09 01:10:37,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:10:37,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-09 01:10:37,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1429, Unknown=6, NotChecked=0, Total=1560 [2024-11-09 01:10:37,638 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 31 states, 30 states have (on average 1.7) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:10:38,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:10:39,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:10:39,904 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2024-11-09 01:10:39,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 01:10:39,905 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.7) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 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 17 [2024-11-09 01:10:39,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:10:39,905 INFO L225 Difference]: With dead ends: 42 [2024-11-09 01:10:39,905 INFO L226 Difference]: Without dead ends: 42 [2024-11-09 01:10:39,906 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=221, Invalid=2425, Unknown=6, NotChecked=0, Total=2652 [2024-11-09 01:10:39,906 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 26 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-09 01:10:39,907 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 213 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 436 Invalid, 1 Unknown, 0 Unchecked, 1.4s Time] [2024-11-09 01:10:39,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-09 01:10:39,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2024-11-09 01:10:39,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 36 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:10:39,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2024-11-09 01:10:39,908 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 17 [2024-11-09 01:10:39,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:10:39,913 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2024-11-09 01:10:39,913 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.7) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:10:39,913 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2024-11-09 01:10:39,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-09 01:10:39,913 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:10:39,913 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2024-11-09 01:10:39,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 01:10:40,114 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:10:40,114 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:10:40,114 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:10:40,114 INFO L85 PathProgramCache]: Analyzing trace with hash 350275610, now seen corresponding path program 2 times [2024-11-09 01:10:40,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:10:40,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551817381] [2024-11-09 01:10:40,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:40,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:10:40,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:40,833 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:10:40,834 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:10:40,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551817381] [2024-11-09 01:10:40,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551817381] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:10:40,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880376225] [2024-11-09 01:10:40,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 01:10:40,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:10:40,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:10:40,836 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:10:40,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 01:10:40,961 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 01:10:40,961 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:10:40,963 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-11-09 01:10:40,965 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:10:40,987 INFO L349 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2024-11-09 01:10:40,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 11 [2024-11-09 01:10:41,768 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:10:41,768 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:10:42,455 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:10:42,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880376225] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:10:42,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2126979778] [2024-11-09 01:10:42,457 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 01:10:42,457 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:10:42,457 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:10:42,458 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:10:42,459 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:10:43,672 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:10:45,698 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2486#true' at error location [2024-11-09 01:10:45,699 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:10:45,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:10:45,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 31 [2024-11-09 01:10:45,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454221263] [2024-11-09 01:10:45,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:10:45,699 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-09 01:10:45,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:10:45,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-09 01:10:45,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1404, Unknown=17, NotChecked=0, Total=1560 [2024-11-09 01:10:45,701 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 33 states, 32 states have (on average 1.6875) internal successors, (54), 32 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) [2024-11-09 01:10:49,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-09 01:10:50,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:10:50,251 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2024-11-09 01:10:50,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-09 01:10:50,252 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.6875) internal successors, (54), 32 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) Word has length 18 [2024-11-09 01:10:50,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:10:50,253 INFO L225 Difference]: With dead ends: 56 [2024-11-09 01:10:50,253 INFO L226 Difference]: Without dead ends: 56 [2024-11-09 01:10:50,254 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=290, Invalid=2763, Unknown=27, NotChecked=0, Total=3080 [2024-11-09 01:10:50,254 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 39 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 27 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-09 01:10:50,254 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 109 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 505 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2024-11-09 01:10:50,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-09 01:10:50,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 48. [2024-11-09 01:10:50,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 44 states have (on average 1.25) internal successors, (55), 47 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:10:50,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2024-11-09 01:10:50,257 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 18 [2024-11-09 01:10:50,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:10:50,257 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2024-11-09 01:10:50,257 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.6875) internal successors, (54), 32 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) [2024-11-09 01:10:50,257 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2024-11-09 01:10:50,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-09 01:10:50,258 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:10:50,258 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:10:50,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 01:10:50,461 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-09 01:10:50,462 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:10:50,462 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:10:50,462 INFO L85 PathProgramCache]: Analyzing trace with hash 432280397, now seen corresponding path program 1 times [2024-11-09 01:10:50,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:10:50,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655933215] [2024-11-09 01:10:50,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:50,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:10:50,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:51,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:10:51,145 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:10:51,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655933215] [2024-11-09 01:10:51,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655933215] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:10:51,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194835600] [2024-11-09 01:10:51,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:51,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:10:51,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:10:51,147 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:10:51,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 01:10:51,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:51,256 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-11-09 01:10:51,258 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:10:51,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 01:10:51,520 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 01:10:51,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 22 [2024-11-09 01:10:51,534 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:10:51,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 15 [2024-11-09 01:10:51,866 INFO L349 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2024-11-09 01:10:51,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 58 [2024-11-09 01:10:52,095 INFO L349 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2024-11-09 01:10:52,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 57 [2024-11-09 01:10:52,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:10:52,265 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:10:52,801 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:10:52,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2024-11-09 01:10:52,923 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:10:52,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 36 [2024-11-09 01:10:52,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2024-11-09 01:10:52,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2024-11-09 01:10:52,953 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:10:52,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2024-11-09 01:10:52,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-09 01:10:53,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:10:53,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194835600] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:10:53,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [808786633] [2024-11-09 01:10:53,044 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 01:10:53,045 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:10:53,045 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:10:53,045 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:10:53,045 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:10:57,212 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:11:09,246 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2906#(and (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (or (< (select |#length| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (< |ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)))' at error location [2024-11-09 01:11:09,246 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:11:09,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:11:09,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 32 [2024-11-09 01:11:09,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444122033] [2024-11-09 01:11:09,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:11:09,247 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-09 01:11:09,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:11:09,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-09 01:11:09,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=2152, Unknown=21, NotChecked=0, Total=2352 [2024-11-09 01:11:09,248 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 34 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 33 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:11:10,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:11:10,848 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2024-11-09 01:11:10,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-09 01:11:10,849 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 33 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 19 [2024-11-09 01:11:10,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:11:10,849 INFO L225 Difference]: With dead ends: 59 [2024-11-09 01:11:10,850 INFO L226 Difference]: Without dead ends: 59 [2024-11-09 01:11:10,850 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=233, Invalid=2716, Unknown=21, NotChecked=0, Total=2970 [2024-11-09 01:11:10,851 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 4 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 01:11:10,851 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 125 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 310 Invalid, 1 Unknown, 0 Unchecked, 1.0s Time] [2024-11-09 01:11:10,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-09 01:11:10,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2024-11-09 01:11:10,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 52 states have (on average 1.25) internal successors, (65), 55 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:11:10,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2024-11-09 01:11:10,854 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 19 [2024-11-09 01:11:10,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:11:10,854 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2024-11-09 01:11:10,854 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 33 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:11:10,855 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2024-11-09 01:11:10,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-09 01:11:10,855 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:11:10,855 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:11:10,870 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 01:11:11,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-09 01:11:11,056 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:11:11,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:11:11,057 INFO L85 PathProgramCache]: Analyzing trace with hash -2026398714, now seen corresponding path program 1 times [2024-11-09 01:11:11,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:11:11,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640576866] [2024-11-09 01:11:11,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:11:11,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:11:11,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:11:11,580 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:11:11,580 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:11:11,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640576866] [2024-11-09 01:11:11,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640576866] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:11:11,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80903634] [2024-11-09 01:11:11,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:11:11,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:11:11,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:11:11,582 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:11:11,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 01:11:11,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:11:11,679 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-09 01:11:11,681 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:11:12,156 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:11:12,156 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:11:12,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-09 01:11:12,796 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:11:12,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80903634] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:11:12,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1591914845] [2024-11-09 01:11:12,797 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-09 01:11:12,798 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:11:12,798 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:11:12,798 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:11:12,798 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:11:14,400 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:11:30,376 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3188#(and (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrlcpy_~d~0#1.base_81| Int) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_79| Int) (|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_79| Int) (|v_ULTIMATE.start_cstrlcpy_~n~0#1_87| Int) (|v_ULTIMATE.start_cstrlcpy_~siz#1_23| Int)) (and (exists ((|v_#memory_int_106| (Array Int (Array Int Int))) (|v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_76| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_77| Int)) (and (<= 1 |#StackHeapBarrier|) (= |#memory_int| (store |v_#memory_int_106| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_77| (store (select |v_#memory_int_106| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_77|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_76| (select (select |#memory_int| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_77|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_76|)))) (<= 1 |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_79|) (<= 1 |v_ULTIMATE.start_cstrlcpy_~siz#1_23|) (<= 2 |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_77|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_76|) (<= (+ |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_76| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_77|)) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_77|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_76|) 0)) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (= 1 (select |#valid| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_77|)) (<= 2 |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_81|) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 2 |ULTIMATE.start_cstrlcpy_~s~0#1.base|))) (not (= (mod |v_ULTIMATE.start_cstrlcpy_~siz#1_23| 18446744073709551616) 0)) (= |v_ULTIMATE.start_cstrlcpy_~n~0#1_87| |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_79|) (= (mod |v_ULTIMATE.start_cstrlcpy_~n~0#1_87| 18446744073709551616) 0) (<= (select |#length| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_81|) |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_79|))))' at error location [2024-11-09 01:11:30,376 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:11:30,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:11:30,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2024-11-09 01:11:30,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105078073] [2024-11-09 01:11:30,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:11:30,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-09 01:11:30,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:11:30,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-09 01:11:30,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1685, Unknown=19, NotChecked=0, Total=1892 [2024-11-09 01:11:30,378 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand has 32 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:11:31,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:11:31,717 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2024-11-09 01:11:31,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 01:11:31,718 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 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 19 [2024-11-09 01:11:31,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:11:31,718 INFO L225 Difference]: With dead ends: 66 [2024-11-09 01:11:31,718 INFO L226 Difference]: Without dead ends: 66 [2024-11-09 01:11:31,719 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=340, Invalid=2611, Unknown=19, NotChecked=0, Total=2970 [2024-11-09 01:11:31,720 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 14 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 01:11:31,720 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 146 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 01:11:31,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-09 01:11:31,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2024-11-09 01:11:31,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 61 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:11:31,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2024-11-09 01:11:31,723 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 19 [2024-11-09 01:11:31,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:11:31,723 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2024-11-09 01:11:31,723 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:11:31,723 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2024-11-09 01:11:31,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-09 01:11:31,724 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:11:31,724 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:11:31,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 01:11:31,924 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-09 01:11:31,925 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:11:31,925 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:11:31,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1748978873, now seen corresponding path program 2 times [2024-11-09 01:11:31,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:11:31,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987927817] [2024-11-09 01:11:31,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:11:31,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:11:31,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:11:32,776 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:11:32,777 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:11:32,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987927817] [2024-11-09 01:11:32,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987927817] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:11:32,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120404612] [2024-11-09 01:11:32,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 01:11:32,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:11:32,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:11:32,780 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:11:32,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 01:11:32,892 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 01:11:32,892 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:11:32,894 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-11-09 01:11:32,897 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:11:32,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 01:11:33,226 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 01:11:33,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 22 [2024-11-09 01:11:33,255 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:11:33,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 15 [2024-11-09 01:11:33,681 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:11:33,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 46 [2024-11-09 01:11:34,048 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:11:34,048 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:11:34,852 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:11:34,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 36 [2024-11-09 01:11:34,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2024-11-09 01:11:34,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2024-11-09 01:11:34,889 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:11:34,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2024-11-09 01:11:34,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 01:11:34,998 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:11:34,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120404612] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:11:34,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1722576354] [2024-11-09 01:11:35,000 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-09 01:11:35,000 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:11:35,000 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:11:35,000 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:11:35,000 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:11:36,853 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:11:49,434 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3503#(and (exists ((|v_ULTIMATE.start_cstrlcpy_~d~0#1.base_92| Int) (|v_ULTIMATE.start_cstrlcpy_~n~0#1_97| Int) (|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_89| Int) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_91| Int) (|v_ULTIMATE.start_cstrlcpy_~siz#1_25| Int) (|v_#memory_int_120| (Array Int (Array Int Int)))) (and (= |v_ULTIMATE.start_cstrlcpy_~n~0#1_97| |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_89|) (<= (+ |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_91| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_92|)) (= (mod |v_ULTIMATE.start_cstrlcpy_~n~0#1_97| 18446744073709551616) 0) (exists ((|v_#memory_int_119| (Array Int (Array Int Int))) (|v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_85| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_87| Int)) (and (<= 1 |#StackHeapBarrier|) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_87|) 1) (not (= (select (select |v_#memory_int_120| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_87|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_85|) 0)) (<= 2 |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_87|) (<= 0 |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_85|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 1 |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_91|) (= (store |v_#memory_int_119| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_87| (store (select |v_#memory_int_119| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_87|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_85| (select (select |v_#memory_int_120| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_87|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_85|))) |v_#memory_int_120|) (<= 1 |v_ULTIMATE.start_cstrlcpy_~siz#1_25|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= (+ |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_85| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_87|)) (<= 2 |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_92|) (<= 2 |ULTIMATE.start_cstrlcpy_~s~0#1.base|))) (= |#memory_int| (store |v_#memory_int_120| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_92| (store (select |v_#memory_int_120| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_92|) |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_91| 0))) (not (= (mod |v_ULTIMATE.start_cstrlcpy_~siz#1_25| 18446744073709551616) 0)) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_92|) 1))) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= (+ (select |#length| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|))' at error location [2024-11-09 01:11:49,434 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:11:49,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:11:49,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 31 [2024-11-09 01:11:49,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062413325] [2024-11-09 01:11:49,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:11:49,435 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-09 01:11:49,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:11:49,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-09 01:11:49,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1977, Unknown=21, NotChecked=0, Total=2162 [2024-11-09 01:11:49,436 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 33 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:11:50,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:11:50,990 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2024-11-09 01:11:50,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 01:11:50,991 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-11-09 01:11:50,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:11:50,991 INFO L225 Difference]: With dead ends: 67 [2024-11-09 01:11:50,991 INFO L226 Difference]: Without dead ends: 67 [2024-11-09 01:11:50,992 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=262, Invalid=3023, Unknown=21, NotChecked=0, Total=3306 [2024-11-09 01:11:50,993 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 16 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 01:11:50,993 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 213 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 418 Invalid, 1 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 01:11:50,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-09 01:11:50,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2024-11-09 01:11:50,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 56 states have (on average 1.2142857142857142) internal successors, (68), 59 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:11:50,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2024-11-09 01:11:50,996 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 21 [2024-11-09 01:11:50,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:11:50,996 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2024-11-09 01:11:50,996 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:11:50,996 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2024-11-09 01:11:50,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-09 01:11:50,997 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:11:50,997 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:11:51,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 01:11:51,200 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-09 01:11:51,201 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:11:51,201 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:11:51,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1753367266, now seen corresponding path program 2 times [2024-11-09 01:11:51,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:11:51,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313002989] [2024-11-09 01:11:51,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:11:51,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:11:51,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:11:52,967 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:11:52,967 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:11:52,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313002989] [2024-11-09 01:11:52,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313002989] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:11:52,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680870424] [2024-11-09 01:11:52,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 01:11:52,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:11:52,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:11:52,970 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:11:52,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 01:11:53,108 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 01:11:53,108 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:11:53,110 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-11-09 01:11:53,114 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:11:53,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 01:11:53,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 01:11:53,454 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 01:11:53,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 22 [2024-11-09 01:11:53,472 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:11:53,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 15 [2024-11-09 01:11:53,821 INFO L349 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2024-11-09 01:11:53,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 58 [2024-11-09 01:11:54,435 INFO L349 Elim1Store]: treesize reduction 24, result has 46.7 percent of original size [2024-11-09 01:11:54,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 40 treesize of output 38 [2024-11-09 01:11:54,628 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:11:54,628 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:11:55,827 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:11:55,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 33 [2024-11-09 01:11:56,085 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:11:56,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 60 treesize of output 48 [2024-11-09 01:11:56,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 57 [2024-11-09 01:11:56,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 46 [2024-11-09 01:11:56,126 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:11:56,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 37 [2024-11-09 01:11:56,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:11:56,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680870424] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:11:56,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [574679955] [2024-11-09 01:11:56,358 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 01:11:56,358 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:11:56,358 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:11:56,358 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:11:56,358 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:12:02,054 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:12:13,286 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3838#(and (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (or (< (select |#length| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (< |ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)))' at error location [2024-11-09 01:12:13,286 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:12:13,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:12:13,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 44 [2024-11-09 01:12:13,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074532432] [2024-11-09 01:12:13,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:12:13,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-09 01:12:13,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:12:13,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-09 01:12:13,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=3377, Unknown=42, NotChecked=0, Total=3660 [2024-11-09 01:12:13,289 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 46 states, 45 states have (on average 1.4666666666666666) internal successors, (66), 45 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:12:15,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:12:15,698 INFO L93 Difference]: Finished difference Result 79 states and 87 transitions. [2024-11-09 01:12:15,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-09 01:12:15,699 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 1.4666666666666666) internal successors, (66), 45 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-09 01:12:15,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:12:15,699 INFO L225 Difference]: With dead ends: 79 [2024-11-09 01:12:15,699 INFO L226 Difference]: Without dead ends: 79 [2024-11-09 01:12:15,701 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1181 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=384, Invalid=5124, Unknown=42, NotChecked=0, Total=5550 [2024-11-09 01:12:15,701 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-09 01:12:15,701 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 96 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 731 Invalid, 1 Unknown, 0 Unchecked, 0.9s Time] [2024-11-09 01:12:15,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-11-09 01:12:15,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2024-11-09 01:12:15,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 68 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:12:15,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2024-11-09 01:12:15,704 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 22 [2024-11-09 01:12:15,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:12:15,705 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2024-11-09 01:12:15,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 1.4666666666666666) internal successors, (66), 45 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:12:15,705 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2024-11-09 01:12:15,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-09 01:12:15,706 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:12:15,706 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2024-11-09 01:12:15,726 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 01:12:15,909 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-09 01:12:15,910 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:12:15,910 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:12:15,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1465654805, now seen corresponding path program 3 times [2024-11-09 01:12:15,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:12:15,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187699096] [2024-11-09 01:12:15,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:12:15,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:12:15,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:12:16,699 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:12:16,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:12:16,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187699096] [2024-11-09 01:12:16,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187699096] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:12:16,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782479273] [2024-11-09 01:12:16,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 01:12:16,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:12:16,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:12:16,700 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:12:16,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 01:12:16,810 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 01:12:16,810 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:12:16,812 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-11-09 01:12:16,815 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:12:16,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-09 01:12:16,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 01:12:16,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 01:12:16,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 01:12:17,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2024-11-09 01:12:17,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 24 [2024-11-09 01:12:17,759 INFO L349 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2024-11-09 01:12:17,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2024-11-09 01:12:17,936 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:12:17,936 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:12:19,117 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:12:19,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 60 treesize of output 48 [2024-11-09 01:12:19,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 57 [2024-11-09 01:12:19,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-09 01:12:19,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-09 01:12:19,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 46 [2024-11-09 01:12:19,339 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:12:19,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782479273] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:12:19,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2126428103] [2024-11-09 01:12:19,341 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 01:12:19,341 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:12:19,341 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:12:19,341 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:12:19,341 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:12:20,498 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:12:24,375 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4197#(and (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_109| Int)) (and (= |ULTIMATE.start_cstrlcpy_~n~0#1| |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_109|) (not (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_109| 18446744073709551616) 0)) (exists ((|v_#memory_int_148| (Array Int (Array Int Int))) (|v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_109| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_104| Int)) (and (<= 1 |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) (<= 1 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 2 |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_109|) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_109|) 1) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_104|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (= |#memory_int| (store |v_#memory_int_148| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_109| (store (select |v_#memory_int_148| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_109|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_104| (select (select |#memory_int| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_109|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_104|)))) (<= 2 |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (<= (+ |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_104| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_109|)) (<= 2 |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_109|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_104|) 0)))))) (= |ULTIMATE.start_cstrlcpy_~d~0#1.offset| (+ |ULTIMATE.start_cstrlcpy_#t~post3#1.offset| 1)) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (= |ULTIMATE.start_cstrlcpy_~d~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (<= (+ (select |#length| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|))' at error location [2024-11-09 01:12:24,375 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:12:24,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:12:24,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 40 [2024-11-09 01:12:24,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991177890] [2024-11-09 01:12:24,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:12:24,376 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-09 01:12:24,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:12:24,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-09 01:12:24,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=2335, Unknown=23, NotChecked=0, Total=2550 [2024-11-09 01:12:24,378 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand has 42 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 41 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:12:26,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:12:26,739 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2024-11-09 01:12:26,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-09 01:12:26,740 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 41 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-09 01:12:26,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:12:26,740 INFO L225 Difference]: With dead ends: 75 [2024-11-09 01:12:26,741 INFO L226 Difference]: Without dead ends: 75 [2024-11-09 01:12:26,742 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=357, Invalid=4172, Unknown=27, NotChecked=0, Total=4556 [2024-11-09 01:12:26,743 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 80 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 12 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 01:12:26,743 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 322 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 596 Invalid, 6 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 01:12:26,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-09 01:12:26,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 69. [2024-11-09 01:12:26,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 68 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:12:26,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2024-11-09 01:12:26,746 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 22 [2024-11-09 01:12:26,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:12:26,746 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2024-11-09 01:12:26,746 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 41 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:12:26,746 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2024-11-09 01:12:26,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-09 01:12:26,747 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:12:26,747 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:12:26,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-09 01:12:26,947 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:12:26,948 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:12:26,948 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:12:26,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1513825534, now seen corresponding path program 3 times [2024-11-09 01:12:26,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:12:26,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023535009] [2024-11-09 01:12:26,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:12:26,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:12:26,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:12:27,905 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:12:27,906 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:12:27,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023535009] [2024-11-09 01:12:27,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023535009] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:12:27,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124406177] [2024-11-09 01:12:27,906 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 01:12:27,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:12:27,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:12:27,908 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:12:27,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 01:12:28,019 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 01:12:28,019 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:12:28,021 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 89 conjuncts are in the unsatisfiable core [2024-11-09 01:12:28,027 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:12:28,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 01:12:28,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-09 01:12:28,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 01:12:28,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2024-11-09 01:12:28,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 19 [2024-11-09 01:12:29,707 INFO L349 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2024-11-09 01:12:29,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 47 [2024-11-09 01:12:29,929 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:12:29,929 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:12:32,490 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:12:32,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 106 treesize of output 72 [2024-11-09 01:12:32,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 103 [2024-11-09 01:12:32,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 80 [2024-11-09 01:12:32,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2024-11-09 01:12:32,921 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:12:32,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124406177] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:12:32,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1355158290] [2024-11-09 01:12:32,922 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 01:12:32,923 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:12:32,923 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:12:32,923 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:12:32,923 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:12:34,063 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:12:35,371 WARN L873 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_116| Int) (|v_#memory_int_160| (Array Int (Array Int Int))) (|v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_110| Int)) (let ((.cse0 (select (select |c_#memory_int| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_116|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_110|))) (and (= |c_#memory_int| (store |v_#memory_int_160| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_116| (store (select |v_#memory_int_160| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_116|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_110| .cse0))) (<= (+ |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_110| 1) (select |c_#length| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_116|)) (not (= .cse0 0)) (= (select |c_#valid| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_116|) 1) (<= 0 |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_110|)))) (let ((.cse1 (store |c_ULTIMATE.start_main_old_#valid#1| |c_ULTIMATE.start_main_#t~malloc10#1.base| 1)) (.cse2 (+ |c_#StackHeapBarrier| 1))) (and (= (select |c_#valid| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) 1) (= |c_#valid| (store .cse1 |c_ULTIMATE.start_main_#t~malloc11#1.base| 1)) (<= .cse2 |c_ULTIMATE.start_main_#t~malloc11#1.base|) (= |c_ULTIMATE.start_cstrlcpy_~d~0#1.offset| 0) (= (select |c_ULTIMATE.start_main_old_#valid#1| 0) 0) (exists ((|v_#length_39| (Array Int Int)) (|v_ULTIMATE.start_main_~length~0#1_27| Int) (|v_#memory_int_156| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~length~0#1_97| Int)) (and (or (and (<= 1 |v_ULTIMATE.start_main_~length~0#1_27|) (= |v_ULTIMATE.start_main_~length~0#1_97| |v_ULTIMATE.start_main_~length~0#1_27|)) (and (= |v_ULTIMATE.start_main_~length~0#1_97| 1) (<= |v_ULTIMATE.start_main_~length~0#1_27| 0))) (<= 0 (+ |v_ULTIMATE.start_main_~length~0#1_27| 2147483648)) (= (store (store |v_#length_39| |c_ULTIMATE.start_main_#t~malloc10#1.base| (mod |c_ULTIMATE.start_cstrlcpy_~siz#1| 18446744073709551616)) |c_ULTIMATE.start_main_#t~malloc11#1.base| (mod |v_ULTIMATE.start_main_~length~0#1_97| 18446744073709551616)) |c_#length|) (<= |v_ULTIMATE.start_main_~length~0#1_97| (select |c_#length| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|)) (= (let ((.cse3 (store |v_#memory_int_156| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| (store (select |v_#memory_int_156| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base|) (+ |c_ULTIMATE.start_cstrlcpy_~siz#1| (- 1)) 0)))) (store .cse3 |c_ULTIMATE.start_cstrlcpy_~s~0#1.base| (store (select .cse3 |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ (- 1) |v_ULTIMATE.start_main_~length~0#1_97|) 0))) |c_#memory_int|) (<= |v_ULTIMATE.start_main_~length~0#1_27| 2147483647) (<= 1 |v_ULTIMATE.start_main_~length~0#1_97|))) (<= 1 |c_#StackHeapBarrier|) (<= |c_ULTIMATE.start_cstrlcpy_~siz#1| (select |c_#length| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base|)) (= |c_ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (= |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 0) (= |c_ULTIMATE.start_main_#t~malloc10#1.base| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base|) (exists ((|v_ULTIMATE.start_main_~n~1#1_26| Int)) (and (<= 0 (+ |v_ULTIMATE.start_main_~n~1#1_26| 2147483648)) (or (and (= |c_ULTIMATE.start_cstrlcpy_~siz#1| 1) (<= |v_ULTIMATE.start_main_~n~1#1_26| 0)) (and (= |c_ULTIMATE.start_cstrlcpy_~siz#1| |v_ULTIMATE.start_main_~n~1#1_26|) (<= 1 |v_ULTIMATE.start_main_~n~1#1_26|))) (<= |v_ULTIMATE.start_main_~n~1#1_26| 2147483647))) (= (select .cse1 |c_ULTIMATE.start_main_#t~malloc11#1.base|) 0) (<= .cse2 |c_ULTIMATE.start_main_#t~malloc10#1.base|) (= |c_ULTIMATE.start_cstrlcpy_~siz#1| |c_ULTIMATE.start_cstrlcpy_~n~0#1|) (= (select |c_#valid| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base|) 1) (not (= (mod |c_ULTIMATE.start_cstrlcpy_~n~0#1| 18446744073709551616) 0)) (not (= |c_ULTIMATE.start_main_#t~malloc11#1.base| 0)) (= |c_ULTIMATE.start_cstrlcpy_~s~0#1.base| |c_ULTIMATE.start_main_#t~malloc11#1.base|) (= (select |c_ULTIMATE.start_main_old_#valid#1| |c_ULTIMATE.start_main_#t~malloc10#1.base|) 0) (not (= |c_ULTIMATE.start_main_#t~malloc10#1.base| 0)) (<= 1 |c_ULTIMATE.start_cstrlcpy_~siz#1|)))) is different from true [2024-11-09 01:12:37,424 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4602#(and (exists ((|v_ULTIMATE.start_cstrlcpy_~d~0#1.base_121| Int) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_118| Int) (|v_#memory_int_161| (Array Int (Array Int Int)))) (and (= |#memory_int| (store |v_#memory_int_161| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_121| (store (select |v_#memory_int_161| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_121|) |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_118| 0))) (= 1 (select |#valid| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_121|)) (<= 0 |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_118|) (<= (+ |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_118| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_121|)))) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_116| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_116| 18446744073709551616) 0)) (exists ((|v_ULTIMATE.start_cstrlcpy_~siz#1_30| Int)) (not (= (mod |v_ULTIMATE.start_cstrlcpy_~siz#1_30| 18446744073709551616) 0))) (or (< (select |#length| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (< |ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) (exists ((|v_ULTIMATE.start_cstrlcpy_~n~0#1_124| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_~n~0#1_124| 18446744073709551616) 0)))' at error location [2024-11-09 01:12:37,424 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:12:37,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:12:37,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20, 20] total 54 [2024-11-09 01:12:37,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348931443] [2024-11-09 01:12:37,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:12:37,425 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-11-09 01:12:37,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:12:37,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-11-09 01:12:37,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=3942, Unknown=35, NotChecked=128, Total=4422 [2024-11-09 01:12:37,427 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand has 56 states, 55 states have (on average 1.5272727272727273) internal successors, (84), 55 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:12:41,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:12:41,655 INFO L93 Difference]: Finished difference Result 97 states and 104 transitions. [2024-11-09 01:12:41,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-09 01:12:41,655 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.5272727272727273) internal successors, (84), 55 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2024-11-09 01:12:41,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:12:41,656 INFO L225 Difference]: With dead ends: 97 [2024-11-09 01:12:41,656 INFO L226 Difference]: Without dead ends: 97 [2024-11-09 01:12:41,658 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 92 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1432 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=620, Invalid=7895, Unknown=45, NotChecked=182, Total=8742 [2024-11-09 01:12:41,659 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 1138 mSolverCounterSat, 6 mSolverCounterUnsat, 25 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 1169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1138 IncrementalHoareTripleChecker+Invalid, 25 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-09 01:12:41,659 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 281 Invalid, 1169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1138 Invalid, 25 Unknown, 0 Unchecked, 1.4s Time] [2024-11-09 01:12:41,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-11-09 01:12:41,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 92. [2024-11-09 01:12:41,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 88 states have (on average 1.125) internal successors, (99), 91 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:12:41,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2024-11-09 01:12:41,661 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 28 [2024-11-09 01:12:41,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:12:41,662 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2024-11-09 01:12:41,662 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.5272727272727273) internal successors, (84), 55 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:12:41,662 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2024-11-09 01:12:41,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-09 01:12:41,662 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:12:41,662 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:12:41,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-09 01:12:41,863 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:12:41,863 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:12:41,863 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:12:41,863 INFO L85 PathProgramCache]: Analyzing trace with hash 428487725, now seen corresponding path program 4 times [2024-11-09 01:12:41,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:12:41,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362508066] [2024-11-09 01:12:41,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:12:41,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:12:41,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:12:45,749 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:12:45,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:12:45,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362508066] [2024-11-09 01:12:45,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362508066] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:12:45,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976146125] [2024-11-09 01:12:45,750 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 01:12:45,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:12:45,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:12:45,753 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:12:45,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 01:12:45,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:12:45,863 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-11-09 01:12:45,865 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:12:45,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 01:12:45,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-09 01:12:46,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 21 [2024-11-09 01:12:47,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2024-11-09 01:12:47,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 37 [2024-11-09 01:12:48,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 38 [2024-11-09 01:12:48,717 INFO L349 Elim1Store]: treesize reduction 12, result has 72.7 percent of original size [2024-11-09 01:12:48,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 50 [2024-11-09 01:12:49,039 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:12:49,039 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:12:51,988 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:12:51,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 60 [2024-11-09 01:12:52,021 INFO L349 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2024-11-09 01:12:52,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 39 [2024-11-09 01:12:52,054 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:12:52,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 101 [2024-11-09 01:12:52,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-09 01:12:52,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 01:12:52,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 01:12:52,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 01:12:52,321 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:12:52,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976146125] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:12:52,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1063473518] [2024-11-09 01:12:52,323 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 01:12:52,323 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:12:52,323 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:12:52,323 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:12:52,324 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:12:53,577 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:12:59,269 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5087#(and (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrlcpy_~siz#1_32| Int)) (not (= (mod |v_ULTIMATE.start_cstrlcpy_~siz#1_32| 18446744073709551616) 0))) (exists ((|v_ULTIMATE.start_cstrlcpy_~n~0#1_135| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_~n~0#1_135| 18446744073709551616) 0)) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_127| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_127| 18446744073709551616) 0)) (or (< (select |#length| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (< |ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) (exists ((|v_#memory_int_179| (Array Int (Array Int Int))) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.base_135| Int) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_128| Int)) (and (<= (+ |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_128| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_135|)) (= |#memory_int| (store |v_#memory_int_179| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_135| (store (select |v_#memory_int_179| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_135|) |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_128| 0))) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_135|) 1) (<= 0 |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_128|))))' at error location [2024-11-09 01:12:59,269 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:12:59,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:12:59,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19, 19] total 61 [2024-11-09 01:12:59,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377117372] [2024-11-09 01:12:59,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:12:59,269 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-11-09 01:12:59,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:12:59,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-11-09 01:12:59,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=5336, Unknown=59, NotChecked=0, Total=5700 [2024-11-09 01:12:59,271 INFO L87 Difference]: Start difference. First operand 92 states and 99 transitions. Second operand has 63 states, 62 states have (on average 1.403225806451613) internal successors, (87), 62 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:13:05,392 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse3 (+ 3 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) (.cse5 (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) (.cse4 (select |c_#length| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|)) (.cse1 (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) (.cse2 (= |c_ULTIMATE.start_cstrlcpy_#t~mem5#1| 0))) (and (or (forall ((v_ArrVal_525 (Array Int Int)) (v_ArrVal_527 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_525))) (or (= (select (select .cse0 |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0) (= (select (select (store .cse0 |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_527) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse1) 0)))) .cse2 (and (<= .cse3 .cse4) (<= 0 .cse5))) (or (forall ((v_ArrVal_524 (Array Int Int)) (v_ArrVal_525 (Array Int Int)) (v_ArrVal_527 (Array Int Int))) (let ((.cse6 (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_524))) (or (= (select (select .cse6 |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0) (= (select (select (store .cse6 |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_527) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse5) 0) (= (select (select (store .cse6 |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_525) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse1) 0)))) (and (<= (+ 4 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) .cse4) (<= 0 .cse3)) .cse2) (or (forall ((v_ArrVal_526 (Array Int Int)) (v_ArrVal_527 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_526) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_527) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0)) (and (<= .cse5 .cse4) (<= 0 .cse1)) .cse2))) is different from false [2024-11-09 01:13:05,678 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse2 (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) (.cse4 (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0)) (.cse1 (+ 3 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) (.cse0 (select |c_#length| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|)) (.cse3 (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|))) (and (or (and (<= (+ 4 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) .cse0) (<= 0 .cse1)) (forall ((v_ArrVal_525 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_525) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse2) 0)) (forall ((v_ArrVal_527 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_527) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse3) 0)) .cse4) (or (and (<= .cse3 .cse0) (<= 0 .cse2)) (forall ((v_ArrVal_527 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_527) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0))) (or (forall ((v_ArrVal_527 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_527) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse2) 0)) .cse4 (and (<= .cse1 .cse0) (<= 0 .cse3))))) is different from false [2024-11-09 01:13:07,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:13:07,055 INFO L93 Difference]: Finished difference Result 113 states and 125 transitions. [2024-11-09 01:13:07,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-09 01:13:07,055 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 1.403225806451613) internal successors, (87), 62 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2024-11-09 01:13:07,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:13:07,056 INFO L225 Difference]: With dead ends: 113 [2024-11-09 01:13:07,056 INFO L226 Difference]: Without dead ends: 113 [2024-11-09 01:13:07,057 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 103 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2297 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=686, Invalid=9703, Unknown=125, NotChecked=406, Total=10920 [2024-11-09 01:13:07,058 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 42 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 1549 mSolverCounterSat, 13 mSolverCounterUnsat, 50 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 1851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1549 IncrementalHoareTripleChecker+Invalid, 50 IncrementalHoareTripleChecker+Unknown, 239 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-09 01:13:07,058 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 241 Invalid, 1851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1549 Invalid, 50 Unknown, 239 Unchecked, 2.5s Time] [2024-11-09 01:13:07,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-11-09 01:13:07,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 100. [2024-11-09 01:13:07,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 96 states have (on average 1.15625) internal successors, (111), 99 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:13:07,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 111 transitions. [2024-11-09 01:13:07,061 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 111 transitions. Word has length 29 [2024-11-09 01:13:07,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:13:07,061 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 111 transitions. [2024-11-09 01:13:07,062 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 1.403225806451613) internal successors, (87), 62 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:13:07,062 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 111 transitions. [2024-11-09 01:13:07,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-09 01:13:07,062 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:13:07,063 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:13:07,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-09 01:13:07,263 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:13:07,263 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:13:07,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:13:07,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1346606152, now seen corresponding path program 5 times [2024-11-09 01:13:07,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:13:07,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161621458] [2024-11-09 01:13:07,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:13:07,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:13:07,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:13:08,600 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:13:08,600 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:13:08,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161621458] [2024-11-09 01:13:08,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161621458] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:13:08,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506413430] [2024-11-09 01:13:08,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 01:13:08,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:13:08,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:13:08,603 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:13:08,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 01:13:08,764 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-09 01:13:08,767 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:13:08,770 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-11-09 01:13:08,773 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:13:08,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 01:13:09,265 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 01:13:09,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 22 [2024-11-09 01:13:09,301 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:13:09,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 15 [2024-11-09 01:13:09,933 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 01:13:09,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 47 [2024-11-09 01:13:09,978 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:13:09,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 42 [2024-11-09 01:13:10,431 INFO L349 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2024-11-09 01:13:10,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 56 treesize of output 69 [2024-11-09 01:13:12,025 INFO L349 Elim1Store]: treesize reduction 56, result has 61.4 percent of original size [2024-11-09 01:13:12,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 58 treesize of output 114 [2024-11-09 01:13:12,717 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:13:12,717 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:13:15,907 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:13:15,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2024-11-09 01:13:18,672 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:13:18,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 102 treesize of output 68 [2024-11-09 01:13:18,715 INFO L349 Elim1Store]: treesize reduction 17, result has 54.1 percent of original size [2024-11-09 01:13:18,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 31 [2024-11-09 01:13:18,739 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 01:13:18,838 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:13:18,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 111 treesize of output 184 [2024-11-09 01:13:18,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-09 01:13:18,952 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:13:18,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 82 [2024-11-09 01:13:18,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 01:13:20,147 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:13:20,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506413430] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:13:20,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2039542177] [2024-11-09 01:13:20,149 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 01:13:20,149 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:13:20,149 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:13:20,149 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:13:20,149 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:13:24,027 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:13:35,081 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5606#(and (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (or (< (select |#length| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (< |ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)))' at error location [2024-11-09 01:13:35,082 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:13:35,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:13:35,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21, 21] total 58 [2024-11-09 01:13:35,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453106597] [2024-11-09 01:13:35,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:13:35,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-11-09 01:13:35,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:13:35,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-11-09 01:13:35,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=5198, Unknown=54, NotChecked=0, Total=5550 [2024-11-09 01:13:35,084 INFO L87 Difference]: Start difference. First operand 100 states and 111 transitions. Second operand has 60 states, 59 states have (on average 1.5254237288135593) internal successors, (90), 59 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:13:46,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:13:46,858 INFO L93 Difference]: Finished difference Result 124 states and 136 transitions. [2024-11-09 01:13:46,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-09 01:13:46,859 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 1.5254237288135593) internal successors, (90), 59 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 30 [2024-11-09 01:13:46,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:13:46,859 INFO L225 Difference]: With dead ends: 124 [2024-11-09 01:13:46,860 INFO L226 Difference]: Without dead ends: 124 [2024-11-09 01:13:46,861 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2128 ImplicationChecksByTransitivity, 28.4s TimeCoverageRelationStatistics Valid=769, Invalid=11595, Unknown=68, NotChecked=0, Total=12432 [2024-11-09 01:13:46,861 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 48 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 1197 mSolverCounterSat, 21 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 1229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1197 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-09 01:13:46,861 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 373 Invalid, 1229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1197 Invalid, 11 Unknown, 0 Unchecked, 2.6s Time] [2024-11-09 01:13:46,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2024-11-09 01:13:46,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 96. [2024-11-09 01:13:46,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 92 states have (on average 1.173913043478261) internal successors, (108), 95 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:13:46,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 108 transitions. [2024-11-09 01:13:46,866 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 108 transitions. Word has length 30 [2024-11-09 01:13:46,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:13:46,866 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 108 transitions. [2024-11-09 01:13:46,867 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 1.5254237288135593) internal successors, (90), 59 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:13:46,867 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 108 transitions. [2024-11-09 01:13:46,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-09 01:13:46,867 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:13:46,867 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:13:46,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-09 01:13:47,068 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:13:47,068 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:13:47,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:13:47,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1098769369, now seen corresponding path program 3 times [2024-11-09 01:13:47,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:13:47,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390772108] [2024-11-09 01:13:47,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:13:47,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:13:47,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:13:48,382 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:13:48,382 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:13:48,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390772108] [2024-11-09 01:13:48,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390772108] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:13:48,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592214670] [2024-11-09 01:13:48,383 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 01:13:48,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:13:48,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:13:48,384 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:13:48,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 01:13:48,526 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 01:13:48,526 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:13:48,529 INFO L255 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-11-09 01:13:48,532 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:13:48,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-09 01:13:48,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 01:13:48,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 01:13:48,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 01:13:48,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2024-11-09 01:13:49,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 24 [2024-11-09 01:13:50,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 30 [2024-11-09 01:13:50,493 INFO L349 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2024-11-09 01:13:50,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 39 [2024-11-09 01:13:50,789 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:13:50,789 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:13:53,474 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:13:53,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 60 [2024-11-09 01:13:53,534 INFO L349 Elim1Store]: treesize reduction 17, result has 54.1 percent of original size [2024-11-09 01:13:53,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 31 [2024-11-09 01:13:53,550 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 01:13:53,589 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:13:53,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 89 [2024-11-09 01:13:53,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-09 01:13:53,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-09 01:13:53,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-09 01:13:53,998 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:13:53,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592214670] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:13:53,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1251613713] [2024-11-09 01:13:54,000 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-09 01:13:54,001 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:13:54,001 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:13:54,001 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:13:54,001 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:13:55,187 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:13:59,641 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6148#(and (exists ((|v_ULTIMATE.start_cstrlcpy_~siz#1_36| Int)) (not (= (mod |v_ULTIMATE.start_cstrlcpy_~siz#1_36| 18446744073709551616) 0))) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_148| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_148| 18446744073709551616) 0)) (exists ((|v_ULTIMATE.start_cstrlcpy_~n~0#1_156| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_~n~0#1_156| 18446744073709551616) 0)) (or (< (select |#length| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (< |ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) (exists ((|v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_151| Int) (|v_#memory_int_212| (Array Int (Array Int Int))) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.base_158| Int)) (and (= |#memory_int| (store |v_#memory_int_212| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_158| (store (select |v_#memory_int_212| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_158|) |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_151| 0))) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_158|) 1) (<= (+ |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_151| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_158|)) (<= 0 |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_151|))))' at error location [2024-11-09 01:13:59,641 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:13:59,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:13:59,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 18] total 51 [2024-11-09 01:13:59,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984326473] [2024-11-09 01:13:59,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:13:59,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-09 01:13:59,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:13:59,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-09 01:13:59,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=3592, Unknown=56, NotChecked=0, Total=3906 [2024-11-09 01:13:59,644 INFO L87 Difference]: Start difference. First operand 96 states and 108 transitions. Second operand has 53 states, 52 states have (on average 1.7884615384615385) internal successors, (93), 52 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:14:03,139 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse5 (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) (.cse2 (select |c_#length| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|)) (.cse4 (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1))) (let ((.cse0 (and (<= .cse5 .cse2) (<= 0 .cse4))) (.cse1 (= |c_ULTIMATE.start_cstrlcpy_#t~mem5#1| 0))) (and (or .cse0 (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0) .cse1) (or (< 4 .cse2) (and .cse1 (= .cse2 4))) (or (forall ((v_ArrVal_603 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_603) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|))) .cse0 .cse1) (or (forall ((v_ArrVal_603 (Array Int Int)) (v_ArrVal_602 (Array Int Int))) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_602))) (or (= 0 (select (select .cse3 |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) (= (select (select (store .cse3 |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_603) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse4) 0)))) .cse1 (and (<= (+ 3 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) .cse2) (<= 0 .cse5))) (= 4 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)))) is different from false [2024-11-09 01:14:04,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:14:04,614 INFO L93 Difference]: Finished difference Result 103 states and 111 transitions. [2024-11-09 01:14:04,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-09 01:14:04,614 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.7884615384615385) internal successors, (93), 52 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2024-11-09 01:14:04,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:14:04,615 INFO L225 Difference]: With dead ends: 103 [2024-11-09 01:14:04,615 INFO L226 Difference]: Without dead ends: 103 [2024-11-09 01:14:04,616 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 87 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1447 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=531, Invalid=7055, Unknown=74, NotChecked=172, Total=7832 [2024-11-09 01:14:04,616 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 69 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 14 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-09 01:14:04,617 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 554 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 961 Invalid, 12 Unknown, 47 Unchecked, 1.5s Time] [2024-11-09 01:14:04,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-11-09 01:14:04,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 89. [2024-11-09 01:14:04,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 85 states have (on average 1.1647058823529413) internal successors, (99), 88 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:14:04,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2024-11-09 01:14:04,621 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 31 [2024-11-09 01:14:04,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:14:04,623 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2024-11-09 01:14:04,623 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.7884615384615385) internal successors, (93), 52 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:14:04,623 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2024-11-09 01:14:04,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-09 01:14:04,624 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:14:04,624 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1] [2024-11-09 01:14:04,645 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-09 01:14:04,824 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:14:04,825 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:14:04,825 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:14:04,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1510970635, now seen corresponding path program 4 times [2024-11-09 01:14:04,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:14:04,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824210964] [2024-11-09 01:14:04,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:14:04,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:14:04,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:06,319 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:14:06,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:14:06,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824210964] [2024-11-09 01:14:06,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824210964] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:14:06,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644539204] [2024-11-09 01:14:06,320 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 01:14:06,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:14:06,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:14:06,321 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:14:06,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 01:14:06,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:06,447 INFO L255 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-11-09 01:14:06,449 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:14:06,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 01:14:06,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-09 01:14:06,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 21 [2024-11-09 01:14:07,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2024-11-09 01:14:08,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 37 [2024-11-09 01:14:09,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 45 [2024-11-09 01:14:09,831 INFO L349 Elim1Store]: treesize reduction 16, result has 70.9 percent of original size [2024-11-09 01:14:09,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 61 [2024-11-09 01:14:10,205 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:14:10,205 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:14:14,449 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:14:14,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 106 treesize of output 72 [2024-11-09 01:14:14,505 INFO L349 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2024-11-09 01:14:14,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 39 [2024-11-09 01:14:14,574 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:14:14,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 119 treesize of output 132 [2024-11-09 01:14:14,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 01:14:14,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-09 01:14:14,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 01:14:14,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 01:14:14,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 01:14:14,931 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:14:14,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644539204] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:14:14,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1234286010] [2024-11-09 01:14:14,933 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 01:14:14,933 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:14:14,933 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:14:14,934 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:14:14,934 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:14:16,188 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:14:21,742 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6652#(and (= |ULTIMATE.start_cstrlcpy_~d~0#1.offset| (+ |ULTIMATE.start_cstrlcpy_#t~post3#1.offset| 1)) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_161| Int)) (and (exists ((|v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_158| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_176| Int) (|v_#memory_int_230| (Array Int (Array Int Int)))) (and (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_176|) 1) (<= 1 |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) (<= 1 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 2 |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_176|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (= |#memory_int| (store |v_#memory_int_230| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_176| (store (select |v_#memory_int_230| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_176|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_158| (select (select |#memory_int| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_176|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_158|)))) (<= 0 |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_158|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 2 |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_176|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_158|) 0)) (<= (+ |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_158| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_176|)) (<= 2 |ULTIMATE.start_cstrlcpy_~s~0#1.base|))) (= |ULTIMATE.start_cstrlcpy_~n~0#1| |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_161|) (not (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_161| 18446744073709551616) 0)))) (= |ULTIMATE.start_cstrlcpy_~d~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (<= (+ (select |#length| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|))' at error location [2024-11-09 01:14:21,742 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:14:21,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:14:21,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 22] total 62 [2024-11-09 01:14:21,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507699801] [2024-11-09 01:14:21,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:14:21,743 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-11-09 01:14:21,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:14:21,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-11-09 01:14:21,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=4893, Unknown=49, NotChecked=0, Total=5256 [2024-11-09 01:14:21,745 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand has 64 states, 63 states have (on average 1.5238095238095237) internal successors, (96), 63 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:14:31,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:14:31,789 INFO L93 Difference]: Finished difference Result 119 states and 131 transitions. [2024-11-09 01:14:31,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-09 01:14:31,790 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 1.5238095238095237) internal successors, (96), 63 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-11-09 01:14:31,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:14:31,790 INFO L225 Difference]: With dead ends: 119 [2024-11-09 01:14:31,790 INFO L226 Difference]: Without dead ends: 119 [2024-11-09 01:14:31,791 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2000 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=718, Invalid=10544, Unknown=80, NotChecked=0, Total=11342 [2024-11-09 01:14:31,791 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 179 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 1382 mSolverCounterSat, 28 mSolverCounterUnsat, 57 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 1467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1382 IncrementalHoareTripleChecker+Invalid, 57 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-11-09 01:14:31,792 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 834 Invalid, 1467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1382 Invalid, 57 Unknown, 0 Unchecked, 2.9s Time] [2024-11-09 01:14:31,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-11-09 01:14:31,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 100. [2024-11-09 01:14:31,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 99 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:14:31,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 113 transitions. [2024-11-09 01:14:31,795 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 113 transitions. Word has length 32 [2024-11-09 01:14:31,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:14:31,796 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 113 transitions. [2024-11-09 01:14:31,796 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 1.5238095238095237) internal successors, (96), 63 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:14:31,796 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 113 transitions. [2024-11-09 01:14:31,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-09 01:14:31,796 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:14:31,796 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 1, 1, 1, 1, 1] [2024-11-09 01:14:31,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-09 01:14:31,997 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:14:31,998 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:14:31,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:14:31,999 INFO L85 PathProgramCache]: Analyzing trace with hash -404550593, now seen corresponding path program 3 times [2024-11-09 01:14:31,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:14:31,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242847426] [2024-11-09 01:14:31,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:14:32,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:14:32,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:33,263 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 21 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:14:33,263 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:14:33,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242847426] [2024-11-09 01:14:33,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242847426] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:14:33,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073624878] [2024-11-09 01:14:33,264 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 01:14:33,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:14:33,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:14:33,266 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:14:33,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-09 01:14:33,430 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 01:14:33,430 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:14:33,433 INFO L255 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-11-09 01:14:33,434 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:14:33,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 01:14:33,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-11-09 01:14:33,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 01:14:35,128 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:14:35,128 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:14:37,146 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:14:37,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073624878] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:14:37,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [760060733] [2024-11-09 01:14:37,148 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 01:14:37,148 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:14:37,149 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:14:37,149 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:14:37,149 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:14:38,434 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:14:42,847 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7188#(and (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_176| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_194| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 1 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_194|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_176|) (<= 0 |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_176|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (<= 2 |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_194|) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 2 |ULTIMATE.start_cstrlcpy_~s~0#1.base|))))' at error location [2024-11-09 01:14:42,847 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:14:42,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:14:42,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 46 [2024-11-09 01:14:42,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980781735] [2024-11-09 01:14:42,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:14:42,848 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-09 01:14:42,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:14:42,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-09 01:14:42,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=2941, Unknown=5, NotChecked=0, Total=3192 [2024-11-09 01:14:42,849 INFO L87 Difference]: Start difference. First operand 100 states and 113 transitions. Second operand has 48 states, 47 states have (on average 2.106382978723404) internal successors, (99), 47 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:14:48,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:14:48,731 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2024-11-09 01:14:48,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-09 01:14:48,732 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 2.106382978723404) internal successors, (99), 47 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2024-11-09 01:14:48,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:14:48,733 INFO L225 Difference]: With dead ends: 105 [2024-11-09 01:14:48,733 INFO L226 Difference]: Without dead ends: 105 [2024-11-09 01:14:48,733 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2086 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=761, Invalid=7976, Unknown=5, NotChecked=0, Total=8742 [2024-11-09 01:14:48,734 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 118 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 1113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-09 01:14:48,734 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 214 Invalid, 1113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1048 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-09 01:14:48,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-11-09 01:14:48,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 95. [2024-11-09 01:14:48,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 93 states have (on average 1.118279569892473) internal successors, (104), 94 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:14:48,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 104 transitions. [2024-11-09 01:14:48,739 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 104 transitions. Word has length 33 [2024-11-09 01:14:48,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:14:48,739 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 104 transitions. [2024-11-09 01:14:48,739 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 2.106382978723404) internal successors, (99), 47 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:14:48,739 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 104 transitions. [2024-11-09 01:14:48,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-09 01:14:48,740 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:14:48,740 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:14:48,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-09 01:14:48,942 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-09 01:14:48,942 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:14:48,942 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:14:48,943 INFO L85 PathProgramCache]: Analyzing trace with hash -215632350, now seen corresponding path program 6 times [2024-11-09 01:14:48,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:14:48,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958489721] [2024-11-09 01:14:48,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:14:48,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:14:48,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:50,687 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:14:50,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:14:50,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958489721] [2024-11-09 01:14:50,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958489721] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:14:50,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856451611] [2024-11-09 01:14:50,688 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 01:14:50,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:14:50,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:14:50,689 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:14:50,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-09 01:14:50,842 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 01:14:50,842 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:14:50,845 INFO L255 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 121 conjuncts are in the unsatisfiable core [2024-11-09 01:14:50,848 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:14:50,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-09 01:14:50,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 01:14:50,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-11-09 01:14:50,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 01:14:51,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2024-11-09 01:14:51,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 24 [2024-11-09 01:14:52,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 30 [2024-11-09 01:14:52,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 31 [2024-11-09 01:14:55,036 INFO L349 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2024-11-09 01:14:55,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 7 case distinctions, treesize of input 65 treesize of output 63 [2024-11-09 01:14:55,041 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-11-09 01:14:55,058 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-09 01:14:55,428 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:14:55,428 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:15:01,860 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:15:01,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 152 treesize of output 96 [2024-11-09 01:15:01,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 163 treesize of output 149 [2024-11-09 01:15:01,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2024-11-09 01:15:01,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-09 01:15:01,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-09 01:15:01,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 114 [2024-11-09 01:15:02,075 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-11-09 01:15:02,097 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-09 01:15:02,374 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 45 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:15:02,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856451611] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:15:02,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1104269490] [2024-11-09 01:15:02,376 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 01:15:02,376 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:15:02,377 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:15:02,377 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:15:02,377 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:15:03,742 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:15:11,422 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7771#(and (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_185| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_185| 18446744073709551616) 0)) (exists ((|v_ULTIMATE.start_cstrlcpy_~siz#1_40| Int)) (not (= 0 (mod |v_ULTIMATE.start_cstrlcpy_~siz#1_40| 18446744073709551616)))) (exists ((|v_ULTIMATE.start_cstrlcpy_~d~0#1.base_204| Int) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_190| Int) (|v_#memory_int_261| (Array Int (Array Int Int)))) (and (<= 0 |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_190|) (<= (+ |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_190| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_204|)) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_204|) 1) (= |#memory_int| (store |v_#memory_int_261| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_204| (store (select |v_#memory_int_261| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_204|) |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_190| 0))))) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrlcpy_~n~0#1_195| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_~n~0#1_195| 18446744073709551616) 0)) (or (< (select |#length| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (< |ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)))' at error location [2024-11-09 01:15:11,422 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:15:11,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:15:11,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 28, 28] total 76 [2024-11-09 01:15:11,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429824200] [2024-11-09 01:15:11,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:15:11,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2024-11-09 01:15:11,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:15:11,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2024-11-09 01:15:11,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=7574, Unknown=146, NotChecked=0, Total=8190 [2024-11-09 01:15:11,425 INFO L87 Difference]: Start difference. First operand 95 states and 104 transitions. Second operand has 78 states, 77 states have (on average 1.4805194805194806) internal successors, (114), 77 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:15:19,044 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 6 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) (.cse1 (select |c_#length| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|)) (.cse8 (+ 5 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) (.cse5 (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) (.cse6 (+ 3 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) (.cse2 (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) (.cse7 (+ 4 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) (.cse3 (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0))) (and (or (and (<= 0 .cse0) (<= (+ 7 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) .cse1)) (forall ((v_ArrVal_723 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_723) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse2) 0)) .cse3 (forall ((v_ArrVal_726 (Array Int Int))) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_726) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|))) (or (= (select .cse4 .cse5) 0) (= (select .cse4 .cse6) 0) (= (select .cse4 .cse7) 0) (= (select .cse4 .cse8) 0))))) (or (and (<= .cse8 .cse1) (<= 0 .cse7)) (forall ((v_ArrVal_726 (Array Int Int))) (let ((.cse9 (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_726) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|))) (or (= (select .cse9 .cse5) 0) (= (select .cse9 .cse6) 0) (= (select .cse9 .cse2) 0) (= (select .cse9 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0))))) (or (and (<= .cse0 .cse1) (<= 0 .cse8)) (forall ((v_ArrVal_726 (Array Int Int))) (let ((.cse10 (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_726) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|))) (or (= (select .cse10 .cse5) 0) (= (select .cse10 .cse6) 0) (= (select .cse10 .cse2) 0) (= (select .cse10 .cse7) 0)))) .cse3))) is different from false [2024-11-09 01:15:25,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:15:25,069 INFO L93 Difference]: Finished difference Result 163 states and 174 transitions. [2024-11-09 01:15:25,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2024-11-09 01:15:25,070 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 77 states have (on average 1.4805194805194806) internal successors, (114), 77 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2024-11-09 01:15:25,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:15:25,071 INFO L225 Difference]: With dead ends: 163 [2024-11-09 01:15:25,071 INFO L226 Difference]: Without dead ends: 163 [2024-11-09 01:15:25,072 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 141 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3710 ImplicationChecksByTransitivity, 28.1s TimeCoverageRelationStatistics Valid=1287, Invalid=18500, Unknown=239, NotChecked=280, Total=20306 [2024-11-09 01:15:25,072 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 39 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 1739 mSolverCounterSat, 13 mSolverCounterUnsat, 83 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 2060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1739 IncrementalHoareTripleChecker+Invalid, 83 IncrementalHoareTripleChecker+Unknown, 225 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-11-09 01:15:25,072 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 579 Invalid, 2060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1739 Invalid, 83 Unknown, 225 Unchecked, 3.0s Time] [2024-11-09 01:15:25,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-11-09 01:15:25,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 106. [2024-11-09 01:15:25,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 104 states have (on average 1.125) internal successors, (117), 105 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:15:25,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 117 transitions. [2024-11-09 01:15:25,080 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 117 transitions. Word has length 38 [2024-11-09 01:15:25,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:15:25,080 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 117 transitions. [2024-11-09 01:15:25,080 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 77 states have (on average 1.4805194805194806) internal successors, (114), 77 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:15:25,080 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 117 transitions. [2024-11-09 01:15:25,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-09 01:15:25,081 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:15:25,081 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:15:25,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-09 01:15:25,281 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-09 01:15:25,281 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:15:25,281 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:15:25,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1967700889, now seen corresponding path program 7 times [2024-11-09 01:15:25,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:15:25,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805582302] [2024-11-09 01:15:25,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:15:25,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:15:25,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:15:26,773 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:15:26,774 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:15:26,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805582302] [2024-11-09 01:15:26,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805582302] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:15:26,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028448818] [2024-11-09 01:15:26,774 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 01:15:26,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:15:26,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:15:26,775 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:15:26,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-09 01:15:26,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:15:26,920 WARN L253 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 132 conjuncts are in the unsatisfiable core [2024-11-09 01:15:26,922 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:15:26,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 01:15:27,355 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 01:15:27,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 22 [2024-11-09 01:15:27,382 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:15:27,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 15 [2024-11-09 01:15:28,045 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 01:15:28,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 47 [2024-11-09 01:15:28,094 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:15:28,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 42 [2024-11-09 01:15:28,603 INFO L349 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2024-11-09 01:15:28,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 56 treesize of output 69 [2024-11-09 01:15:32,251 INFO L349 Elim1Store]: treesize reduction 44, result has 48.2 percent of original size [2024-11-09 01:15:32,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 17 case distinctions, treesize of input 80 treesize of output 78 [2024-11-09 01:15:32,255 WARN L672 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2024-11-09 01:15:32,273 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-11-09 01:15:32,702 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:15:32,703 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:15:38,611 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:15:38,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 81 [2024-11-09 01:15:40,634 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:15:40,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 175 treesize of output 108 [2024-11-09 01:15:40,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 172 [2024-11-09 01:15:40,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 131 [2024-11-09 01:15:40,755 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:15:40,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 105 [2024-11-09 01:15:40,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-09 01:15:40,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 01:15:41,191 WARN L672 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2024-11-09 01:15:41,438 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:15:41,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028448818] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:15:41,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [102918043] [2024-11-09 01:15:41,439 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 01:15:41,440 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:15:41,440 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:15:41,440 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:15:41,440 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:15:42,853 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:15:50,990 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8467#(and (exists ((|v_ULTIMATE.start_cstrlcpy_~n~0#1_205| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_~n~0#1_205| 18446744073709551616) 0)) (exists ((|v_ULTIMATE.start_cstrlcpy_~d~0#1.base_215| Int) (|v_#memory_int_277| (Array Int (Array Int Int))) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_202| Int)) (and (<= 0 |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_202|) (<= (+ |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_202| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_215|)) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_215|) 1) (= (store |v_#memory_int_277| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_215| (store (select |v_#memory_int_277| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_215|) |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_202| 0)) |#memory_int|))) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_195| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_195| 18446744073709551616) 0)) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (or (< (select |#length| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (< |ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) (exists ((|v_ULTIMATE.start_cstrlcpy_~siz#1_42| Int)) (not (= (mod |v_ULTIMATE.start_cstrlcpy_~siz#1_42| 18446744073709551616) 0))))' at error location [2024-11-09 01:15:50,990 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:15:50,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:15:50,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 30, 30] total 79 [2024-11-09 01:15:50,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340930471] [2024-11-09 01:15:50,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:15:50,991 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2024-11-09 01:15:50,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:15:50,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2024-11-09 01:15:50,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=525, Invalid=8187, Unknown=30, NotChecked=0, Total=8742 [2024-11-09 01:15:50,993 INFO L87 Difference]: Start difference. First operand 106 states and 117 transitions. Second operand has 81 states, 80 states have (on average 1.4625) internal successors, (117), 80 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:16:09,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:16:09,443 INFO L93 Difference]: Finished difference Result 181 states and 193 transitions. [2024-11-09 01:16:09,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2024-11-09 01:16:09,444 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 80 states have (on average 1.4625) internal successors, (117), 80 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2024-11-09 01:16:09,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:16:09,445 INFO L225 Difference]: With dead ends: 181 [2024-11-09 01:16:09,445 INFO L226 Difference]: Without dead ends: 181 [2024-11-09 01:16:09,446 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4272 ImplicationChecksByTransitivity, 34.7s TimeCoverageRelationStatistics Valid=1747, Invalid=22393, Unknown=40, NotChecked=0, Total=24180 [2024-11-09 01:16:09,446 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 130 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 2122 mSolverCounterSat, 51 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 2183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2122 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2024-11-09 01:16:09,447 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 522 Invalid, 2183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2122 Invalid, 10 Unknown, 0 Unchecked, 3.5s Time] [2024-11-09 01:16:09,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2024-11-09 01:16:09,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 132. [2024-11-09 01:16:09,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 130 states have (on average 1.1) internal successors, (143), 131 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:16:09,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 143 transitions. [2024-11-09 01:16:09,451 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 143 transitions. Word has length 39 [2024-11-09 01:16:09,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:16:09,452 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 143 transitions. [2024-11-09 01:16:09,452 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 80 states have (on average 1.4625) internal successors, (117), 80 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:16:09,452 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 143 transitions. [2024-11-09 01:16:09,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-09 01:16:09,453 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:16:09,453 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:16:09,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-09 01:16:09,654 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-09 01:16:09,654 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-09 01:16:09,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:16:09,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1073986750, now seen corresponding path program 8 times [2024-11-09 01:16:09,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:16:09,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924266653] [2024-11-09 01:16:09,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:16:09,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:16:09,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:16:11,073 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:16:11,073 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:16:11,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924266653] [2024-11-09 01:16:11,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924266653] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:16:11,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115496299] [2024-11-09 01:16:11,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 01:16:11,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:16:11,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:16:11,075 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:16:11,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94826105-9645-4fb4-be75-0f8b2919b220/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-09 01:16:11,260 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-09 01:16:11,260 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:16:11,263 INFO L255 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 119 conjuncts are in the unsatisfiable core [2024-11-09 01:16:11,265 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:16:11,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 01:16:11,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-09 01:16:11,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-09 01:16:11,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 19 [2024-11-09 01:16:18,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 20 [2024-11-09 01:20:58,636 INFO L349 Elim1Store]: treesize reduction 32, result has 92.1 percent of original size [2024-11-09 01:20:58,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 84 treesize of output 413 [2024-11-09 01:21:05,249 WARN L672 sPolynomialRelations]: Constructing 512(two to the power of 9 dual juncts. [2024-11-09 01:21:28,509 WARN L286 SmtUtils]: Spent 23.19s on a formula simplification. DAG size of input: 636 DAG size of output: 34 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-09 01:21:28,595 WARN L672 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2024-11-09 01:21:35,213 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 85 refuted. 17 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:21:35,214 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:22:31,512 WARN L851 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_788 (Array Int Int)) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_170| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_172| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_174| Int) (v_ArrVal_790 (Array Int Int)) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_162| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_164| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_166| Int) (|v_ULTIMATE.start_cstrlcpy_~s~0#1.offset_298| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_168| Int)) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_788) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_790) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|))) (or (< (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_172| 1) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_170|) (< |v_ULTIMATE.start_cstrlcpy_~s~0#1.offset_298| (select |c_#length| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|)) (< |v_ULTIMATE.start_cstrlcpy_~s~0#1.offset_298| 1) (= (select .cse0 (+ (- 1) |v_ULTIMATE.start_cstrlcpy_~s~0#1.offset_298|)) 0) (= (select .cse0 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_170|) 0) (< (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_166| 1) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_164|) (= (select .cse0 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_162|) 0) (= (select .cse0 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_172|) 0) (< (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_170| 1) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_168|) (= (select .cse0 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_166|) 0) (< (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_164| 1) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_162|) (< (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_174| 1) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_172|) (< (+ 2 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_162|) |v_ULTIMATE.start_cstrlcpy_~s~0#1.offset_298|) (= (select .cse0 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_174|) 0) (= (select .cse0 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_164|) 0) (< |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_174|) (= (select .cse0 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_168|) 0) (< (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_168| 1) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_166|)))) (= |c_ULTIMATE.start_cstrlcpy_#t~mem5#1| 0)) is different from false [2024-11-09 01:22:41,185 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:22:41,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 184 treesize of output 106 [2024-11-09 01:22:41,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 185 treesize of output 167 [2024-11-09 01:22:41,860 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:22:41,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 228 treesize of output 512 [2024-11-09 01:22:42,115 INFO L224 Elim1Store]: Index analysis took 154 ms [2024-11-09 01:22:42,600 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:22:42,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 75 treesize of output 295 [2024-11-09 01:23:37,251 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 98 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:23:37,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115496299] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:23:37,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [448998609] [2024-11-09 01:23:37,253 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 01:23:37,255 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:23:37,255 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:23:37,256 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:23:37,256 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:23:39,187 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:23:48,109 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9235#(and (exists ((|v_ULTIMATE.start_cstrlcpy_~siz#1_44| Int)) (not (= (mod |v_ULTIMATE.start_cstrlcpy_~siz#1_44| 18446744073709551616) 0))) (exists ((|v_ULTIMATE.start_cstrlcpy_~n~0#1_214| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_~n~0#1_214| 18446744073709551616) 0)) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (or (< (select |#length| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (< |ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) (exists ((|v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_210| Int) (|v_#memory_int_291| (Array Int (Array Int Int))) (|v_ULTIMATE.start_cstrlcpy_~d~0#1.base_225| Int)) (and (<= (+ |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_210| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_225|)) (= 1 (select |#valid| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_225|)) (<= 0 |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_210|) (= |#memory_int| (store |v_#memory_int_291| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_225| (store (select |v_#memory_int_291| |v_ULTIMATE.start_cstrlcpy_~d~0#1.base_225|) |v_ULTIMATE.start_cstrlcpy_~d~0#1.offset_210| 0))))) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_204| Int)) (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_204| 18446744073709551616) 0)))' at error location [2024-11-09 01:23:48,109 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:23:48,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:23:48,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 32, 32] total 82 [2024-11-09 01:23:48,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082430320] [2024-11-09 01:23:48,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:23:48,110 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2024-11-09 01:23:48,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:23:48,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2024-11-09 01:23:48,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=796, Invalid=8186, Unknown=142, NotChecked=188, Total=9312 [2024-11-09 01:23:48,111 INFO L87 Difference]: Start difference. First operand 132 states and 143 transitions. Second operand has 84 states, 83 states have (on average 1.4457831325301205) internal successors, (120), 83 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:23:50,581 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:24:05,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:24:07,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:24:08,925 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:24:11,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:24:19,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 01:24:23,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]