./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext/dll_extends_pointer.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version cf1a7837 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_c7cd9971-7846-4526-a3fa-101b37191469/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7cd9971-7846-4526-a3fa-101b37191469/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7cd9971-7846-4526-a3fa-101b37191469/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7cd9971-7846-4526-a3fa-101b37191469/bin/utaipan-verify-NcY6lQBIFX/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext/dll_extends_pointer.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7cd9971-7846-4526-a3fa-101b37191469/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7cd9971-7846-4526-a3fa-101b37191469/bin/utaipan-verify-NcY6lQBIFX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b19ed65fc9d9f8e19f4d644b05d37e3da28cb107a90eedb15c652c094a7f23f1 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 01:02:39,646 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 01:02:39,733 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7cd9971-7846-4526-a3fa-101b37191469/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-12 01:02:39,738 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 01:02:39,739 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 01:02:39,785 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 01:02:39,786 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 01:02:39,786 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 01:02:39,787 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 01:02:39,792 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 01:02:39,792 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 01:02:39,793 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 01:02:39,794 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 01:02:39,795 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 01:02:39,796 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 01:02:39,796 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 01:02:39,796 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 01:02:39,797 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 01:02:39,797 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 01:02:39,798 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 01:02:39,798 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 01:02:39,799 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 01:02:39,799 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 01:02:39,800 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 01:02:39,800 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 01:02:39,800 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 01:02:39,801 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 01:02:39,801 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 01:02:39,802 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 01:02:39,802 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-12 01:02:39,802 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-12 01:02:39,803 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-12 01:02:39,803 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 01:02:39,803 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 01:02:39,803 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 01:02:39,803 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 01:02:39,804 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 01:02:39,804 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 01:02:39,804 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 01:02:39,804 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:02:39,805 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 01:02:39,805 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 01:02:39,805 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 01:02:39,805 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 01:02:39,805 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 01:02:39,806 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 01:02:39,806 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_c7cd9971-7846-4526-a3fa-101b37191469/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7cd9971-7846-4526-a3fa-101b37191469/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b19ed65fc9d9f8e19f4d644b05d37e3da28cb107a90eedb15c652c094a7f23f1 [2023-11-12 01:02:40,073 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 01:02:40,093 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 01:02:40,096 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 01:02:40,097 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 01:02:40,098 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 01:02:40,099 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7cd9971-7846-4526-a3fa-101b37191469/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/memsafety-ext/dll_extends_pointer.i [2023-11-12 01:02:43,222 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 01:02:43,512 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 01:02:43,512 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7cd9971-7846-4526-a3fa-101b37191469/sv-benchmarks/c/memsafety-ext/dll_extends_pointer.i [2023-11-12 01:02:43,529 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7cd9971-7846-4526-a3fa-101b37191469/bin/utaipan-verify-NcY6lQBIFX/data/786481a62/8bab2eb4cba2443faf8a7916aa5c9a9d/FLAGcc32f690d [2023-11-12 01:02:43,815 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7cd9971-7846-4526-a3fa-101b37191469/bin/utaipan-verify-NcY6lQBIFX/data/786481a62/8bab2eb4cba2443faf8a7916aa5c9a9d [2023-11-12 01:02:43,817 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 01:02:43,819 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 01:02:43,820 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 01:02:43,820 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 01:02:43,826 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 01:02:43,827 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:02:43" (1/1) ... [2023-11-12 01:02:43,828 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1afaa005 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:43, skipping insertion in model container [2023-11-12 01:02:43,828 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:02:43" (1/1) ... [2023-11-12 01:02:43,876 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 01:02:44,168 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:02:44,178 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 01:02:44,219 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:02:44,251 INFO L206 MainTranslator]: Completed translation [2023-11-12 01:02:44,252 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:44 WrapperNode [2023-11-12 01:02:44,252 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 01:02:44,253 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 01:02:44,253 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 01:02:44,254 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 01:02:44,261 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:44" (1/1) ... [2023-11-12 01:02:44,275 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:44" (1/1) ... [2023-11-12 01:02:44,297 INFO L138 Inliner]: procedures = 123, calls = 21, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 64 [2023-11-12 01:02:44,298 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 01:02:44,298 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 01:02:44,299 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 01:02:44,299 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 01:02:44,309 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:44" (1/1) ... [2023-11-12 01:02:44,309 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:44" (1/1) ... [2023-11-12 01:02:44,312 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:44" (1/1) ... [2023-11-12 01:02:44,312 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:44" (1/1) ... [2023-11-12 01:02:44,320 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:44" (1/1) ... [2023-11-12 01:02:44,323 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:44" (1/1) ... [2023-11-12 01:02:44,329 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:44" (1/1) ... [2023-11-12 01:02:44,331 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:44" (1/1) ... [2023-11-12 01:02:44,334 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 01:02:44,335 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 01:02:44,335 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 01:02:44,335 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 01:02:44,336 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:44" (1/1) ... [2023-11-12 01:02:44,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:02:44,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7cd9971-7846-4526-a3fa-101b37191469/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:44,380 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7cd9971-7846-4526-a3fa-101b37191469/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 01:02:44,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7cd9971-7846-4526-a3fa-101b37191469/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 01:02:44,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 01:02:44,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 01:02:44,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 01:02:44,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 01:02:44,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 01:02:44,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 01:02:44,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 01:02:44,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 01:02:44,520 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 01:02:44,522 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 01:02:44,819 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 01:02:44,897 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 01:02:44,897 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 01:02:44,900 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:02:44 BoogieIcfgContainer [2023-11-12 01:02:44,900 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 01:02:44,903 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 01:02:44,903 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 01:02:44,928 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 01:02:44,929 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 01:02:43" (1/3) ... [2023-11-12 01:02:44,929 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3564a1ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:02:44, skipping insertion in model container [2023-11-12 01:02:44,930 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:44" (2/3) ... [2023-11-12 01:02:44,930 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3564a1ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:02:44, skipping insertion in model container [2023-11-12 01:02:44,930 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:02:44" (3/3) ... [2023-11-12 01:02:44,932 INFO L112 eAbstractionObserver]: Analyzing ICFG dll_extends_pointer.i [2023-11-12 01:02:44,952 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 01:02:44,952 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2023-11-12 01:02:45,004 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 01:02:45,011 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7444a0b2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 01:02:45,012 INFO L358 AbstractCegarLoop]: Starting to check reachability of 27 error locations. [2023-11-12 01:02:45,016 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 51 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:45,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-12 01:02:45,023 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:45,024 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-12 01:02:45,025 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-12 01:02:45,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:45,031 INFO L85 PathProgramCache]: Analyzing trace with hash 3879, now seen corresponding path program 1 times [2023-11-12 01:02:45,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:45,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952621561] [2023-11-12 01:02:45,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:45,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:45,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:45,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:45,311 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:45,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952621561] [2023-11-12 01:02:45,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952621561] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:45,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:02:45,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 01:02:45,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943240392] [2023-11-12 01:02:45,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:45,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:02:45,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:45,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:02:45,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:02:45,356 INFO L87 Difference]: Start difference. First operand has 52 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 51 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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) [2023-11-12 01:02:45,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:45,465 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2023-11-12 01:02:45,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:02:45,468 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 [2023-11-12 01:02:45,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:45,477 INFO L225 Difference]: With dead ends: 53 [2023-11-12 01:02:45,477 INFO L226 Difference]: Without dead ends: 52 [2023-11-12 01:02:45,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:02:45,483 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 34 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:45,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 20 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:02:45,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-12 01:02:45,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2023-11-12 01:02:45,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 46 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:45,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2023-11-12 01:02:45,548 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 2 [2023-11-12 01:02:45,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:45,549 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2023-11-12 01:02:45,549 INFO L496 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) [2023-11-12 01:02:45,552 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2023-11-12 01:02:45,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-12 01:02:45,552 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:45,553 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-12 01:02:45,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 01:02:45,554 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-12 01:02:45,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:45,555 INFO L85 PathProgramCache]: Analyzing trace with hash 3880, now seen corresponding path program 1 times [2023-11-12 01:02:45,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:45,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9466194] [2023-11-12 01:02:45,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:45,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:45,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:45,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:45,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:45,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9466194] [2023-11-12 01:02:45,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9466194] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:45,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:02:45,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 01:02:45,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511114144] [2023-11-12 01:02:45,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:45,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:02:45,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:45,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:02:45,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:02:45,715 INFO L87 Difference]: Start difference. First operand 47 states and 52 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) [2023-11-12 01:02:45,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:45,832 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2023-11-12 01:02:45,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:02:45,833 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 [2023-11-12 01:02:45,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:45,834 INFO L225 Difference]: With dead ends: 48 [2023-11-12 01:02:45,834 INFO L226 Difference]: Without dead ends: 48 [2023-11-12 01:02:45,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:02:45,836 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 14 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:45,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 39 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:02:45,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-12 01:02:45,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2023-11-12 01:02:45,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:45,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2023-11-12 01:02:45,844 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 2 [2023-11-12 01:02:45,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:45,845 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2023-11-12 01:02:45,845 INFO L496 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) [2023-11-12 01:02:45,845 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2023-11-12 01:02:45,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-12 01:02:45,846 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:45,846 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:45,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 01:02:45,847 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-12 01:02:45,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:45,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1730509016, now seen corresponding path program 1 times [2023-11-12 01:02:45,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:45,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852897169] [2023-11-12 01:02:45,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:45,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:45,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:45,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:45,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:45,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852897169] [2023-11-12 01:02:45,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852897169] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:45,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:02:45,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 01:02:45,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652863158] [2023-11-12 01:02:45,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:45,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 01:02:45,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:45,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 01:02:45,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 01:02:45,988 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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) [2023-11-12 01:02:46,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:46,121 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2023-11-12 01:02:46,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 01:02:46,122 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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 [2023-11-12 01:02:46,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:46,123 INFO L225 Difference]: With dead ends: 69 [2023-11-12 01:02:46,123 INFO L226 Difference]: Without dead ends: 69 [2023-11-12 01:02:46,123 INFO L412 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 [2023-11-12 01:02:46,125 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 50 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:46,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 34 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:02:46,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-11-12 01:02:46,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 43. [2023-11-12 01:02:46,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 42 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:46,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2023-11-12 01:02:46,139 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 8 [2023-11-12 01:02:46,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:46,140 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2023-11-12 01:02:46,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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) [2023-11-12 01:02:46,142 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2023-11-12 01:02:46,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-12 01:02:46,143 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:46,143 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:46,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 01:02:46,144 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-12 01:02:46,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:46,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1730507620, now seen corresponding path program 1 times [2023-11-12 01:02:46,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:46,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498178477] [2023-11-12 01:02:46,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:46,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:46,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:46,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:46,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:46,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498178477] [2023-11-12 01:02:46,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498178477] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:46,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:02:46,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 01:02:46,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428972149] [2023-11-12 01:02:46,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:46,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 01:02:46,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:46,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 01:02:46,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 01:02:46,278 INFO L87 Difference]: Start difference. First operand 43 states and 48 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) [2023-11-12 01:02:46,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:46,390 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2023-11-12 01:02:46,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 01:02:46,391 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 [2023-11-12 01:02:46,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:46,392 INFO L225 Difference]: With dead ends: 48 [2023-11-12 01:02:46,392 INFO L226 Difference]: Without dead ends: 48 [2023-11-12 01:02:46,393 INFO L412 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 [2023-11-12 01:02:46,394 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 36 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:46,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 22 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:02:46,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-12 01:02:46,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2023-11-12 01:02:46,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.7) internal successors, (51), 43 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) [2023-11-12 01:02:46,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2023-11-12 01:02:46,402 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 8 [2023-11-12 01:02:46,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:46,402 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2023-11-12 01:02:46,402 INFO L496 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) [2023-11-12 01:02:46,403 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2023-11-12 01:02:46,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-12 01:02:46,403 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:46,403 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:46,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 01:02:46,404 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-12 01:02:46,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:46,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1730507621, now seen corresponding path program 1 times [2023-11-12 01:02:46,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:46,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005366221] [2023-11-12 01:02:46,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:46,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:46,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:46,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:46,584 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:46,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005366221] [2023-11-12 01:02:46,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005366221] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:46,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:02:46,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 01:02:46,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678911117] [2023-11-12 01:02:46,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:46,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 01:02:46,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:46,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 01:02:46,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 01:02:46,590 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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) [2023-11-12 01:02:46,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:46,728 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2023-11-12 01:02:46,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 01:02:46,729 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 [2023-11-12 01:02:46,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:46,734 INFO L225 Difference]: With dead ends: 74 [2023-11-12 01:02:46,734 INFO L226 Difference]: Without dead ends: 74 [2023-11-12 01:02:46,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:02:46,742 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 36 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:46,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 40 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:02:46,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-12 01:02:46,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 59. [2023-11-12 01:02:46,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 45 states have (on average 1.5777777777777777) internal successors, (71), 58 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) [2023-11-12 01:02:46,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2023-11-12 01:02:46,750 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 8 [2023-11-12 01:02:46,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:46,750 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2023-11-12 01:02:46,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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) [2023-11-12 01:02:46,751 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2023-11-12 01:02:46,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-12 01:02:46,751 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:46,751 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:46,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 01:02:46,757 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-12 01:02:46,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:46,759 INFO L85 PathProgramCache]: Analyzing trace with hash 866437451, now seen corresponding path program 1 times [2023-11-12 01:02:46,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:46,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635843035] [2023-11-12 01:02:46,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:46,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:46,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:47,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:47,052 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:47,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635843035] [2023-11-12 01:02:47,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635843035] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:47,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:02:47,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 01:02:47,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099751639] [2023-11-12 01:02:47,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:47,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 01:02:47,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:47,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 01:02:47,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 01:02:47,056 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) 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) [2023-11-12 01:02:47,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:47,111 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2023-11-12 01:02:47,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:02:47,118 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) 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 10 [2023-11-12 01:02:47,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:47,119 INFO L225 Difference]: With dead ends: 58 [2023-11-12 01:02:47,119 INFO L226 Difference]: Without dead ends: 58 [2023-11-12 01:02:47,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 01:02:47,124 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 20 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:47,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 34 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 01:02:47,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-12 01:02:47,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2023-11-12 01:02:47,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 57 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:47,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2023-11-12 01:02:47,143 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 10 [2023-11-12 01:02:47,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:47,143 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2023-11-12 01:02:47,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) 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) [2023-11-12 01:02:47,144 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2023-11-12 01:02:47,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-12 01:02:47,144 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:47,144 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:47,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 01:02:47,145 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-12 01:02:47,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:47,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1463010864, now seen corresponding path program 1 times [2023-11-12 01:02:47,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:47,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825908261] [2023-11-12 01:02:47,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:47,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:47,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:47,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:47,473 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:47,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825908261] [2023-11-12 01:02:47,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825908261] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:47,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:02:47,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 01:02:47,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049372272] [2023-11-12 01:02:47,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:47,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 01:02:47,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:47,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 01:02:47,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-12 01:02:47,478 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 6 states, 6 states have (on average 2.0) 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) [2023-11-12 01:02:47,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:47,669 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2023-11-12 01:02:47,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 01:02:47,670 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) 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 12 [2023-11-12 01:02:47,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:47,671 INFO L225 Difference]: With dead ends: 63 [2023-11-12 01:02:47,671 INFO L226 Difference]: Without dead ends: 63 [2023-11-12 01:02:47,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-12 01:02:47,674 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 36 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:47,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 69 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:02:47,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-12 01:02:47,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 53. [2023-11-12 01:02:47,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 40 states have (on average 1.525) internal successors, (61), 52 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:47,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2023-11-12 01:02:47,688 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 12 [2023-11-12 01:02:47,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:47,688 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2023-11-12 01:02:47,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) 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) [2023-11-12 01:02:47,688 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2023-11-12 01:02:47,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-12 01:02:47,689 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:47,689 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:47,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 01:02:47,689 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-12 01:02:47,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:47,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1462999879, now seen corresponding path program 1 times [2023-11-12 01:02:47,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:47,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893455520] [2023-11-12 01:02:47,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:47,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:47,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:47,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:47,763 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:47,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893455520] [2023-11-12 01:02:47,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893455520] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:47,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:02:47,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 01:02:47,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46448470] [2023-11-12 01:02:47,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:47,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 01:02:47,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:47,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 01:02:47,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 01:02:47,765 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:47,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:47,839 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2023-11-12 01:02:47,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 01:02:47,840 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-12 01:02:47,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:47,840 INFO L225 Difference]: With dead ends: 69 [2023-11-12 01:02:47,840 INFO L226 Difference]: Without dead ends: 69 [2023-11-12 01:02:47,841 INFO L412 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 [2023-11-12 01:02:47,841 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 40 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:47,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 50 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:02:47,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-11-12 01:02:47,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2023-11-12 01:02:47,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 49 states have (on average 1.5714285714285714) internal successors, (77), 61 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) [2023-11-12 01:02:47,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 77 transitions. [2023-11-12 01:02:47,847 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 77 transitions. Word has length 12 [2023-11-12 01:02:47,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:47,848 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 77 transitions. [2023-11-12 01:02:47,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:47,848 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 77 transitions. [2023-11-12 01:02:47,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-12 01:02:47,849 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:47,849 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:47,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 01:02:47,849 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-12 01:02:47,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:47,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1098836238, now seen corresponding path program 1 times [2023-11-12 01:02:47,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:47,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112287251] [2023-11-12 01:02:47,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:47,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:47,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:47,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:47,957 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:47,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112287251] [2023-11-12 01:02:47,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112287251] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:02:47,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840328579] [2023-11-12 01:02:47,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:47,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:47,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7cd9971-7846-4526-a3fa-101b37191469/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:47,964 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7cd9971-7846-4526-a3fa-101b37191469/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:02:47,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7cd9971-7846-4526-a3fa-101b37191469/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 01:02:48,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:48,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 01:02:48,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:02:48,199 INFO L351 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 13 treesize of output 9 [2023-11-12 01:02:48,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:48,231 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:02:48,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:48,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840328579] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:02:48,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1456049522] [2023-11-12 01:02:48,293 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-12 01:02:48,293 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:02:48,298 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:02:48,304 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:02:48,305 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:02:49,125 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:02:51,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1456049522] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:51,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:02:51,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [3, 3, 3] total 13 [2023-11-12 01:02:51,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127438934] [2023-11-12 01:02:51,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:51,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 01:02:51,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:51,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 01:02:51,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=152, Unknown=3, NotChecked=0, Total=210 [2023-11-12 01:02:51,521 INFO L87 Difference]: Start difference. First operand 62 states and 77 transitions. Second operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:54,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:54,106 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2023-11-12 01:02:54,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 01:02:54,106 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-12 01:02:54,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:54,108 INFO L225 Difference]: With dead ends: 78 [2023-11-12 01:02:54,108 INFO L226 Difference]: Without dead ends: 64 [2023-11-12 01:02:54,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=55, Invalid=152, Unknown=3, NotChecked=0, Total=210 [2023-11-12 01:02:54,109 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 7 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:54,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 61 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 328 Invalid, 8 Unknown, 0 Unchecked, 2.6s Time] [2023-11-12 01:02:54,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-12 01:02:54,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2023-11-12 01:02:54,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 51 states have (on average 1.5490196078431373) internal successors, (79), 63 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:54,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 79 transitions. [2023-11-12 01:02:54,115 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 79 transitions. Word has length 15 [2023-11-12 01:02:54,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:54,115 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 79 transitions. [2023-11-12 01:02:54,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:54,115 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 79 transitions. [2023-11-12 01:02:54,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-12 01:02:54,116 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:54,116 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:54,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7cd9971-7846-4526-a3fa-101b37191469/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 01:02:54,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7cd9971-7846-4526-a3fa-101b37191469/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:54,327 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-12 01:02:54,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:54,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1447780460, now seen corresponding path program 1 times [2023-11-12 01:02:54,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:54,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82606672] [2023-11-12 01:02:54,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:54,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:54,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:54,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:54,473 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:54,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82606672] [2023-11-12 01:02:54,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82606672] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:54,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:02:54,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 01:02:54,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692140724] [2023-11-12 01:02:54,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:54,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 01:02:54,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:54,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 01:02:54,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:02:54,474 INFO L87 Difference]: Start difference. First operand 64 states and 79 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:54,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:54,567 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2023-11-12 01:02:54,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 01:02:54,567 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-12 01:02:54,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:54,568 INFO L225 Difference]: With dead ends: 72 [2023-11-12 01:02:54,568 INFO L226 Difference]: Without dead ends: 72 [2023-11-12 01:02:54,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-12 01:02:54,569 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 62 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:54,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 37 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:02:54,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-12 01:02:54,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 60. [2023-11-12 01:02:54,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 48 states have (on average 1.4583333333333333) internal successors, (70), 59 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:54,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2023-11-12 01:02:54,574 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 15 [2023-11-12 01:02:54,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:54,574 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2023-11-12 01:02:54,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:54,574 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2023-11-12 01:02:54,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-12 01:02:54,575 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:54,575 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:54,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-12 01:02:54,576 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-12 01:02:54,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:54,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1986639017, now seen corresponding path program 1 times [2023-11-12 01:02:54,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:54,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738930327] [2023-11-12 01:02:54,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:54,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:54,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:54,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:54,962 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:54,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738930327] [2023-11-12 01:02:54,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738930327] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:54,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:02:54,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 01:02:54,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417913969] [2023-11-12 01:02:54,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:54,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 01:02:54,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:54,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 01:02:54,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:02:54,968 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:55,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:55,141 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2023-11-12 01:02:55,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 01:02:55,142 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 [2023-11-12 01:02:55,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:55,142 INFO L225 Difference]: With dead ends: 76 [2023-11-12 01:02:55,143 INFO L226 Difference]: Without dead ends: 76 [2023-11-12 01:02:55,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-11-12 01:02:55,143 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 54 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:55,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 86 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:02:55,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-11-12 01:02:55,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 60. [2023-11-12 01:02:55,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 48 states have (on average 1.4375) internal successors, (69), 59 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:55,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2023-11-12 01:02:55,148 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 19 [2023-11-12 01:02:55,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:55,153 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2023-11-12 01:02:55,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:55,153 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2023-11-12 01:02:55,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 01:02:55,155 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:55,155 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:55,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-12 01:02:55,157 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-12 01:02:55,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:55,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1456267282, now seen corresponding path program 1 times [2023-11-12 01:02:55,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:55,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780372699] [2023-11-12 01:02:55,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:55,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:55,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:55,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:55,586 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:55,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780372699] [2023-11-12 01:02:55,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780372699] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:55,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:02:55,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 01:02:55,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469935061] [2023-11-12 01:02:55,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:55,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 01:02:55,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:55,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 01:02:55,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:02:55,588 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:55,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:55,796 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2023-11-12 01:02:55,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 01:02:55,797 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-12 01:02:55,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:55,797 INFO L225 Difference]: With dead ends: 75 [2023-11-12 01:02:55,798 INFO L226 Difference]: Without dead ends: 75 [2023-11-12 01:02:55,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-11-12 01:02:55,798 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 48 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:55,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 65 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:02:55,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-12 01:02:55,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 60. [2023-11-12 01:02:55,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 48 states have (on average 1.4166666666666667) 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) [2023-11-12 01:02:55,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2023-11-12 01:02:55,803 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 20 [2023-11-12 01:02:55,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:55,803 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2023-11-12 01:02:55,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:55,803 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2023-11-12 01:02:55,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-12 01:02:55,804 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:55,805 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:55,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-12 01:02:55,805 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-12 01:02:55,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:55,806 INFO L85 PathProgramCache]: Analyzing trace with hash 2100354617, now seen corresponding path program 1 times [2023-11-12 01:02:55,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:55,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687467866] [2023-11-12 01:02:55,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:55,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:55,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:56,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:56,120 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:56,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687467866] [2023-11-12 01:02:56,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687467866] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:56,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:02:56,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 01:02:56,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140416966] [2023-11-12 01:02:56,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:56,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 01:02:56,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:56,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 01:02:56,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:02:56,123 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:56,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:56,282 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2023-11-12 01:02:56,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 01:02:56,282 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-12 01:02:56,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:56,283 INFO L225 Difference]: With dead ends: 61 [2023-11-12 01:02:56,283 INFO L226 Difference]: Without dead ends: 61 [2023-11-12 01:02:56,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-11-12 01:02:56,284 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 32 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:56,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 48 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:02:56,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-12 01:02:56,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2023-11-12 01:02:56,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 59 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:56,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2023-11-12 01:02:56,288 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 21 [2023-11-12 01:02:56,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:56,288 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2023-11-12 01:02:56,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:56,289 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2023-11-12 01:02:56,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-12 01:02:56,289 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:56,290 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:56,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-12 01:02:56,290 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-12 01:02:56,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:56,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1013749287, now seen corresponding path program 1 times [2023-11-12 01:02:56,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:56,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009138690] [2023-11-12 01:02:56,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:56,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:56,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:56,559 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:56,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:56,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009138690] [2023-11-12 01:02:56,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009138690] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:02:56,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347607795] [2023-11-12 01:02:56,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:56,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:56,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7cd9971-7846-4526-a3fa-101b37191469/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:56,565 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7cd9971-7846-4526-a3fa-101b37191469/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:02:56,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7cd9971-7846-4526-a3fa-101b37191469/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 01:02:56,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:56,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-12 01:02:56,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:02:56,704 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-12 01:02:56,745 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-12 01:02:56,746 INFO L351 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 11 treesize of output 11 [2023-11-12 01:02:56,769 INFO L351 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 15 treesize of output 1 [2023-11-12 01:02:56,821 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 01:02:56,821 INFO L351 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 18 treesize of output 16 [2023-11-12 01:02:56,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:56,872 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:02:56,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347607795] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:56,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:02:56,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 16 [2023-11-12 01:02:56,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167810488] [2023-11-12 01:02:56,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:56,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 01:02:56,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:56,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 01:02:56,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2023-11-12 01:02:56,877 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:57,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:57,151 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2023-11-12 01:02:57,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 01:02:57,152 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-12 01:02:57,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:57,153 INFO L225 Difference]: With dead ends: 68 [2023-11-12 01:02:57,153 INFO L226 Difference]: Without dead ends: 67 [2023-11-12 01:02:57,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2023-11-12 01:02:57,154 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 29 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:57,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 90 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:02:57,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-12 01:02:57,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2023-11-12 01:02:57,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 48 states have (on average 1.375) internal successors, (66), 59 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) [2023-11-12 01:02:57,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2023-11-12 01:02:57,157 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 22 [2023-11-12 01:02:57,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:57,158 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2023-11-12 01:02:57,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:57,158 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2023-11-12 01:02:57,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-12 01:02:57,159 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:57,159 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:57,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7cd9971-7846-4526-a3fa-101b37191469/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 01:02:57,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7cd9971-7846-4526-a3fa-101b37191469/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-12 01:02:57,365 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-12 01:02:57,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:57,366 INFO L85 PathProgramCache]: Analyzing trace with hash 939258027, now seen corresponding path program 1 times [2023-11-12 01:02:57,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:57,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427150399] [2023-11-12 01:02:57,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:57,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:57,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:57,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:57,605 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:57,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427150399] [2023-11-12 01:02:57,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427150399] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:02:57,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8742144] [2023-11-12 01:02:57,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:57,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:57,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7cd9971-7846-4526-a3fa-101b37191469/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:57,607 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7cd9971-7846-4526-a3fa-101b37191469/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:02:57,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7cd9971-7846-4526-a3fa-101b37191469/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 01:02:57,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:57,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-12 01:02:57,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:02:57,739 INFO L351 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 6 treesize of output 5 [2023-11-12 01:02:57,770 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-12 01:02:57,771 INFO L351 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 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-12 01:02:57,798 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-12 01:02:57,850 INFO L322 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-12 01:02:57,851 INFO L351 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 1 case distinctions, treesize of input 33 treesize of output 32 [2023-11-12 01:02:57,887 INFO L351 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 23 [2023-11-12 01:02:57,980 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 01:02:57,980 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 31 treesize of output 15 [2023-11-12 01:02:57,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:57,991 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:02:58,165 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_526 (Array Int Int)) (|v_ULTIMATE.start_main_~list~0#1.offset_34| Int)) (or (< |c_ULTIMATE.start_main_~y~0#1.offset| |v_ULTIMATE.start_main_~list~0#1.offset_34|) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~list~0#1.base| v_ArrVal_526) |c_ULTIMATE.start_main_~y~0#1.base|) |v_ULTIMATE.start_main_~list~0#1.offset_34|) 0)) (< |v_ULTIMATE.start_main_~list~0#1.offset_34| 0))) is different from false [2023-11-12 01:02:58,180 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 01:02:58,181 INFO L351 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 19 treesize of output 20 [2023-11-12 01:02:58,195 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 01:02:58,196 INFO L351 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 33 treesize of output 33 [2023-11-12 01:02:58,203 INFO L351 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 18 [2023-11-12 01:02:58,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:58,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8742144] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:02:58,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [933641671] [2023-11-12 01:02:58,384 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-11-12 01:02:58,384 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:02:58,385 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:02:58,386 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:02:58,386 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:03:04,275 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:03:10,629 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2181#(and (= |ULTIMATE.start_main_~y~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (= |ULTIMATE.start_main_~list~0#1.offset| 0) (or (= |ULTIMATE.start_main_~y~0#1.base| 0) (and (<= 12 (select |#length| |ULTIMATE.start_main_~y~0#1.base|)) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~y~0#1.base|) 8) 12) (<= (+ |ULTIMATE.start_main_~y~0#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#valid_67| (Array Int Int)) (|v_ULTIMATE.start_main_~list~0#1.offset_42| Int) (|v_ULTIMATE.start_main_~list~0#1.base_44| Int)) (and (<= (+ 4 |v_ULTIMATE.start_main_~list~0#1.offset_42|) (select |#length| |v_ULTIMATE.start_main_~list~0#1.base_44|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~list~0#1.base_44|) |v_ULTIMATE.start_main_~list~0#1.offset_42|) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~list~0#1.base_44|) |v_ULTIMATE.start_main_~list~0#1.offset_42|) 0) (<= 0 |v_ULTIMATE.start_main_~list~0#1.offset_42|) (= (select |v_#valid_67| |v_ULTIMATE.start_main_~list~0#1.base_44|) 1) (= (select |v_#valid_67| |ULTIMATE.start_main_~y~0#1.base|) 1) (= |#valid| (store |v_#valid_67| |ULTIMATE.start_main_~y~0#1.base| 0)))) (= |ULTIMATE.start_main_~y~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~y~0#1.base|) 8)))) (= |ULTIMATE.start_main_~list~0#1.base| 0) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2023-11-12 01:03:10,630 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:03:10,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:03:10,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 20 [2023-11-12 01:03:10,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598763623] [2023-11-12 01:03:10,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 01:03:10,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-12 01:03:10,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:03:10,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-12 01:03:10,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1298, Unknown=8, NotChecked=74, Total=1560 [2023-11-12 01:03:10,633 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:03:11,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:03:11,934 INFO L93 Difference]: Finished difference Result 106 states and 116 transitions. [2023-11-12 01:03:11,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-12 01:03:11,935 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-12 01:03:11,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:03:11,936 INFO L225 Difference]: With dead ends: 106 [2023-11-12 01:03:11,936 INFO L226 Difference]: Without dead ends: 106 [2023-11-12 01:03:11,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=534, Invalid=2768, Unknown=8, NotChecked=112, Total=3422 [2023-11-12 01:03:11,939 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 199 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 01:03:11,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 127 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 431 Invalid, 0 Unknown, 101 Unchecked, 0.5s Time] [2023-11-12 01:03:11,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-11-12 01:03:11,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 63. [2023-11-12 01:03:11,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 62 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:03:11,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2023-11-12 01:03:11,942 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 22 [2023-11-12 01:03:11,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:03:11,942 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2023-11-12 01:03:11,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:03:11,942 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2023-11-12 01:03:11,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-12 01:03:11,943 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:03:11,943 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:03:11,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7cd9971-7846-4526-a3fa-101b37191469/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 01:03:12,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7cd9971-7846-4526-a3fa-101b37191469/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:03:12,149 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-12 01:03:12,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:03:12,150 INFO L85 PathProgramCache]: Analyzing trace with hash 939256631, now seen corresponding path program 1 times [2023-11-12 01:03:12,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:03:12,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444954553] [2023-11-12 01:03:12,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:12,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:03:12,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:03:12,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:03:12,475 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:03:12,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444954553] [2023-11-12 01:03:12,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444954553] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:03:12,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560043420] [2023-11-12 01:03:12,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:12,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:03:12,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7cd9971-7846-4526-a3fa-101b37191469/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:03:12,491 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7cd9971-7846-4526-a3fa-101b37191469/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:03:12,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7cd9971-7846-4526-a3fa-101b37191469/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 01:03:12,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:03:12,615 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-12 01:03:12,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:03:12,622 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-12 01:03:12,644 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-12 01:03:12,644 INFO L351 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 11 treesize of output 11 [2023-11-12 01:03:12,675 INFO L351 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 11 treesize of output 7 [2023-11-12 01:03:12,719 INFO L322 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-12 01:03:12,719 INFO L351 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 1 case distinctions, treesize of input 34 treesize of output 33 [2023-11-12 01:03:12,758 INFO L351 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 29 treesize of output 24 [2023-11-12 01:03:12,916 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 01:03:12,916 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 32 treesize of output 16 [2023-11-12 01:03:12,945 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-12 01:03:12,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:03:12,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:03:13,335 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 01:03:13,336 INFO L351 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 45 treesize of output 49 [2023-11-12 01:03:13,513 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 01:03:13,513 INFO L351 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 19 treesize of output 20 [2023-11-12 01:03:13,528 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 01:03:13,528 INFO L351 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 33 treesize of output 33 [2023-11-12 01:03:13,534 INFO L351 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 18 [2023-11-12 01:03:13,567 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-12 01:03:13,568 INFO L351 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 18 treesize of output 1 [2023-11-12 01:03:13,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:03:13,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560043420] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:03:13,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2104616214] [2023-11-12 01:03:13,649 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-11-12 01:03:13,650 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:03:13,650 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:03:13,650 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:03:13,651 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:03:19,302 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:03:25,407 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2559#(and (<= 1 |#StackHeapBarrier|) (not (= (select |#valid| |ULTIMATE.start_main_~list~0#1.base|) 1)))' at error location [2023-11-12 01:03:25,407 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:03:25,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:03:25,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-11-12 01:03:25,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207605791] [2023-11-12 01:03:25,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 01:03:25,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-12 01:03:25,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:03:25,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-12 01:03:25,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1434, Unknown=6, NotChecked=0, Total=1640 [2023-11-12 01:03:25,410 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:03:26,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:03:26,895 INFO L93 Difference]: Finished difference Result 85 states and 91 transitions. [2023-11-12 01:03:26,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-12 01:03:26,896 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-12 01:03:26,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:03:26,896 INFO L225 Difference]: With dead ends: 85 [2023-11-12 01:03:26,896 INFO L226 Difference]: Without dead ends: 85 [2023-11-12 01:03:26,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=566, Invalid=2968, Unknown=6, NotChecked=0, Total=3540 [2023-11-12 01:03:26,899 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 130 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 01:03:26,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 115 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 01:03:26,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-12 01:03:26,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 66. [2023-11-12 01:03:26,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 54 states have (on average 1.3888888888888888) internal successors, (75), 65 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) [2023-11-12 01:03:26,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 75 transitions. [2023-11-12 01:03:26,903 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 75 transitions. Word has length 22 [2023-11-12 01:03:26,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:03:26,903 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 75 transitions. [2023-11-12 01:03:26,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:03:26,903 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 75 transitions. [2023-11-12 01:03:26,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-12 01:03:26,904 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:03:26,904 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:03:26,916 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7cd9971-7846-4526-a3fa-101b37191469/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-12 01:03:27,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7cd9971-7846-4526-a3fa-101b37191469/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-12 01:03:27,111 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-12 01:03:27,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:03:27,111 INFO L85 PathProgramCache]: Analyzing trace with hash 939256632, now seen corresponding path program 1 times [2023-11-12 01:03:27,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:03:27,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898464104] [2023-11-12 01:03:27,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:27,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:03:27,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:03:27,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:03:27,575 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:03:27,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898464104] [2023-11-12 01:03:27,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898464104] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:03:27,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585194851] [2023-11-12 01:03:27,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:27,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:03:27,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7cd9971-7846-4526-a3fa-101b37191469/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:03:27,581 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7cd9971-7846-4526-a3fa-101b37191469/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:03:27,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7cd9971-7846-4526-a3fa-101b37191469/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 01:03:27,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:03:27,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-12 01:03:27,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:03:27,733 INFO L351 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 [2023-11-12 01:03:27,737 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-12 01:03:27,792 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-12 01:03:27,792 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-11-12 01:03:27,812 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-12 01:03:27,813 INFO L351 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 11 treesize of output 11 [2023-11-12 01:03:27,847 INFO L351 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 11 treesize of output 7 [2023-11-12 01:03:27,858 INFO L351 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 11 treesize of output 7 [2023-11-12 01:03:27,909 INFO L322 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-12 01:03:27,909 INFO L351 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 1 case distinctions, treesize of input 50 treesize of output 45 [2023-11-12 01:03:27,945 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-11-12 01:03:27,992 INFO L351 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 29 treesize of output 24 [2023-11-12 01:03:28,004 INFO L351 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 23 treesize of output 11 [2023-11-12 01:03:28,137 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 32 treesize of output 16 [2023-11-12 01:03:28,142 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-12 01:03:28,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:03:28,170 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:03:28,662 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 01:03:28,663 INFO L351 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 20 treesize of output 21 [2023-11-12 01:03:28,677 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 01:03:28,677 INFO L351 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 34 treesize of output 34 [2023-11-12 01:03:28,683 INFO L351 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 9 treesize of output 7 [2023-11-12 01:03:28,717 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 01:03:28,717 INFO L351 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 37 treesize of output 38 [2023-11-12 01:03:28,732 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 01:03:28,732 INFO L351 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 29 treesize of output 30 [2023-11-12 01:03:28,736 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 01:03:28,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 01:03:28,740 INFO L351 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2023-11-12 01:03:28,744 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 01:03:28,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 01:03:28,748 INFO L351 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2023-11-12 01:03:28,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:03:28,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585194851] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:03:28,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [265682873] [2023-11-12 01:03:29,003 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-11-12 01:03:29,004 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:03:29,005 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:03:29,006 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:03:29,006 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:03:34,659 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:03:35,492 WARN L876 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~y~0#1.offset| 0) (= |c_ULTIMATE.start_main_~list~0#1.offset| 0) (let ((.cse1 (= (select |c_#valid| |c_ULTIMATE.start_main_~list~0#1.base|) 1)) (.cse4 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~list~0#1.base|) 4)) (.cse3 (<= (+ |c_ULTIMATE.start_main_~y~0#1.base| 1) |c_#StackHeapBarrier|)) (.cse5 (<= 4 (select |c_#length| |c_ULTIMATE.start_main_~y~0#1.base|))) (.cse6 (<= 8 (select |c_#length| |c_ULTIMATE.start_main_~list~0#1.base|))) (.cse7 (not (= |c_ULTIMATE.start_main_~y~0#1.base| 0))) (.cse8 (= (select |c_#valid| |c_ULTIMATE.start_main_~y~0#1.base|) 1))) (or (and (exists ((|v_#memory_$Pointer$.offset_99| (Array Int (Array Int Int)))) (= |c_#memory_$Pointer$.offset| (let ((.cse0 (store |v_#memory_$Pointer$.offset_99| |c_ULTIMATE.start_main_~y~0#1.base| (store (select |v_#memory_$Pointer$.offset_99| |c_ULTIMATE.start_main_~y~0#1.base|) 0 0)))) (store .cse0 |c_ULTIMATE.start_main_~list~0#1.base| (store (select .cse0 |c_ULTIMATE.start_main_~list~0#1.base|) 4 0))))) (exists ((|v_ULTIMATE.start_main_#t~nondet4#1_34| Int)) (and (<= |v_ULTIMATE.start_main_#t~nondet4#1_34| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_#t~nondet4#1_34| 2147483648)) (not (= |v_ULTIMATE.start_main_#t~nondet4#1_34| 0)))) .cse1 (exists ((|v_#memory_$Pointer$.base_106| (Array Int (Array Int Int)))) (= |c_#memory_$Pointer$.base| (let ((.cse2 (store |v_#memory_$Pointer$.base_106| |c_ULTIMATE.start_main_~y~0#1.base| (store (select |v_#memory_$Pointer$.base_106| |c_ULTIMATE.start_main_~y~0#1.base|) 0 |c_ULTIMATE.start_main_~list~0#1.base|)))) (store .cse2 |c_ULTIMATE.start_main_~list~0#1.base| (store (select .cse2 |c_ULTIMATE.start_main_~list~0#1.base|) 4 |c_ULTIMATE.start_main_~y~0#1.base|))))) .cse3 (exists ((|v_#memory_int_95| (Array Int (Array Int Int))) (|v_#memory_int_94| (Array Int (Array Int Int)))) (and (= |v_#memory_int_95| (store |v_#memory_int_94| |c_ULTIMATE.start_main_~y~0#1.base| (store (select |v_#memory_int_94| |c_ULTIMATE.start_main_~y~0#1.base|) 0 (select (select |v_#memory_int_95| |c_ULTIMATE.start_main_~y~0#1.base|) 0)))) (= |c_#memory_int| (store |v_#memory_int_95| |c_ULTIMATE.start_main_~list~0#1.base| (store (select |v_#memory_int_95| |c_ULTIMATE.start_main_~list~0#1.base|) 4 .cse4))))) .cse5 .cse6 .cse7 .cse8 (exists ((|v_#length_60| (Array Int Int))) (= |c_#length| (store |v_#length_60| |c_ULTIMATE.start_main_~y~0#1.base| 13))) (exists ((|v_#valid_91| (Array Int Int))) (and (= |c_#valid| (store |v_#valid_91| |c_ULTIMATE.start_main_~y~0#1.base| 1)) (= (select |v_#valid_91| |c_ULTIMATE.start_main_~y~0#1.base|) 0)))) (let ((.cse14 (store |c_ULTIMATE.start_main_old_#valid#1| |c_ULTIMATE.start_main_~list~0#1.base| 1))) (and .cse1 (exists ((|v_#length_56| (Array Int Int))) (and (= 2 (select |v_#length_56| 1)) (= (store (store |v_#length_56| |c_ULTIMATE.start_main_~list~0#1.base| 13) |c_ULTIMATE.start_main_~y~0#1.base| 13) |c_#length|) (= (select |v_#length_56| 2) 22))) (exists ((|v_#memory_$Pointer$.base_94| (Array Int (Array Int Int)))) (= |c_#memory_$Pointer$.base| (let ((.cse10 (store |v_#memory_$Pointer$.base_94| |c_ULTIMATE.start_main_~list~0#1.base| (store (store (store (select |v_#memory_$Pointer$.base_94| |c_ULTIMATE.start_main_~list~0#1.base|) 0 0) 4 0) 8 |c_ULTIMATE.start_main_~list~0#1.base|)))) (let ((.cse9 (store (select .cse10 |c_ULTIMATE.start_main_~y~0#1.base|) 0 |c_ULTIMATE.start_main_~list~0#1.base|))) (store (store |v_#memory_$Pointer$.base_94| |c_ULTIMATE.start_main_~y~0#1.base| .cse9) |c_ULTIMATE.start_main_~list~0#1.base| (store (select (store .cse10 |c_ULTIMATE.start_main_~y~0#1.base| .cse9) |c_ULTIMATE.start_main_~list~0#1.base|) 4 |c_ULTIMATE.start_main_~y~0#1.base|)))))) (exists ((|v_#memory_int_84| (Array Int (Array Int Int))) (|v_#memory_int_85| (Array Int (Array Int Int))) (|v_#memory_int_86| (Array Int (Array Int Int))) (|v_#memory_int_82| (Array Int (Array Int Int))) (|v_#memory_int_83| (Array Int (Array Int Int)))) (let ((.cse12 (select |v_#memory_int_82| 1)) (.cse13 (select |v_#memory_int_83| |c_ULTIMATE.start_main_~list~0#1.base|)) (.cse11 (select |v_#memory_int_84| |c_ULTIMATE.start_main_~list~0#1.base|))) (and (= |v_#memory_int_85| (store |v_#memory_int_84| |c_ULTIMATE.start_main_~list~0#1.base| (store .cse11 8 (select (select |v_#memory_int_85| |c_ULTIMATE.start_main_~list~0#1.base|) 8)))) (= 48 (select .cse12 0)) (= (store |v_#memory_int_82| |c_ULTIMATE.start_main_~list~0#1.base| (store (select |v_#memory_int_82| |c_ULTIMATE.start_main_~list~0#1.base|) 0 (select .cse13 0))) |v_#memory_int_83|) (= |v_#memory_int_86| (store |v_#memory_int_85| |c_ULTIMATE.start_main_~y~0#1.base| (store (select |v_#memory_int_85| |c_ULTIMATE.start_main_~y~0#1.base|) 0 (select (select |v_#memory_int_86| |c_ULTIMATE.start_main_~y~0#1.base|) 0)))) (= (store |v_#memory_int_86| |c_ULTIMATE.start_main_~list~0#1.base| (store (select |v_#memory_int_86| |c_ULTIMATE.start_main_~list~0#1.base|) 4 .cse4)) |c_#memory_int|) (= (select .cse12 1) 0) (= (store |v_#memory_int_83| |c_ULTIMATE.start_main_~list~0#1.base| (store .cse13 4 (select .cse11 4))) |v_#memory_int_84|)))) (= (select |c_ULTIMATE.start_main_old_#valid#1| 0) 0) .cse3 (= (select |c_ULTIMATE.start_main_old_#valid#1| 2) 1) (<= (+ |c_ULTIMATE.start_main_~list~0#1.base| 1) |c_#StackHeapBarrier|) (= (select .cse14 |c_ULTIMATE.start_main_~y~0#1.base|) 0) .cse5 (not (= |c_ULTIMATE.start_main_~list~0#1.base| 0)) .cse6 .cse7 (= |c_#valid| (store .cse14 |c_ULTIMATE.start_main_~y~0#1.base| 1)) (exists ((|v_#memory_$Pointer$.offset_87| (Array Int (Array Int Int)))) (= |c_#memory_$Pointer$.offset| (let ((.cse16 (store |v_#memory_$Pointer$.offset_87| |c_ULTIMATE.start_main_~list~0#1.base| (store (store (store (select |v_#memory_$Pointer$.offset_87| |c_ULTIMATE.start_main_~list~0#1.base|) 0 0) 4 0) 8 12)))) (let ((.cse15 (store (select .cse16 |c_ULTIMATE.start_main_~y~0#1.base|) 0 0))) (store (store |v_#memory_$Pointer$.offset_87| |c_ULTIMATE.start_main_~y~0#1.base| .cse15) |c_ULTIMATE.start_main_~list~0#1.base| (store (select (store .cse16 |c_ULTIMATE.start_main_~y~0#1.base| .cse15) |c_ULTIMATE.start_main_~list~0#1.base|) 4 0)))))) (= (select |c_ULTIMATE.start_main_old_#valid#1| |c_ULTIMATE.start_main_~list~0#1.base|) 0) .cse8 (= (select |c_ULTIMATE.start_main_old_#valid#1| 1) 1) (exists ((|v_ULTIMATE.start_main_#t~nondet4#1_30| Int)) (and (<= 0 (+ |v_ULTIMATE.start_main_#t~nondet4#1_30| 2147483648)) (<= |v_ULTIMATE.start_main_#t~nondet4#1_30| 2147483647) (not (= |v_ULTIMATE.start_main_#t~nondet4#1_30| 0)))))))) (<= 1 |c_#StackHeapBarrier|) (<= |c_ULTIMATE.start_main_#t~nondet6#1| 2147483647) (<= 0 (+ |c_ULTIMATE.start_main_#t~nondet6#1| 2147483648))) is different from true