./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/26_stack_cas.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_02b5d324-c006-48fc-a1e2-7d7d4f9bb32d/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b5d324-c006-48fc-a1e2-7d7d4f9bb32d/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_02b5d324-c006-48fc-a1e2-7d7d4f9bb32d/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b5d324-c006-48fc-a1e2-7d7d4f9bb32d/bin/utaipan-verify-NcY6lQBIFX/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/26_stack_cas.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b5d324-c006-48fc-a1e2-7d7d4f9bb32d/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_02b5d324-c006-48fc-a1e2-7d7d4f9bb32d/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 fa97ad6141e9aa8818b694f4968e766701fe7261f516cd86f7a15e5cf1a3d14d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:48:15,502 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:48:15,637 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b5d324-c006-48fc-a1e2-7d7d4f9bb32d/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-12 00:48:15,641 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:48:15,642 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:48:15,695 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:48:15,695 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:48:15,696 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:48:15,697 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:48:15,697 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:48:15,698 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:48:15,698 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:48:15,699 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:48:15,699 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:48:15,700 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:48:15,700 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:48:15,701 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:48:15,701 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:48:15,702 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:48:15,702 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:48:15,703 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:48:15,704 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:48:15,705 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 00:48:15,705 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 00:48:15,706 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:48:15,707 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:48:15,707 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:48:15,707 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:48:15,708 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:48:15,708 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-12 00:48:15,709 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-12 00:48:15,709 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-12 00:48:15,710 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:48:15,710 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 00:48:15,711 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 00:48:15,711 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:48:15,711 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:48:15,712 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:48:15,712 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:48:15,713 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:48:15,713 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:48:15,714 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:48:15,714 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:48:15,715 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:48:15,715 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:48:15,716 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:48:15,716 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_02b5d324-c006-48fc-a1e2-7d7d4f9bb32d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b5d324-c006-48fc-a1e2-7d7d4f9bb32d/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa97ad6141e9aa8818b694f4968e766701fe7261f516cd86f7a15e5cf1a3d14d [2023-11-12 00:48:15,961 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:48:15,989 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:48:15,992 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:48:15,993 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:48:15,995 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:48:15,996 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b5d324-c006-48fc-a1e2-7d7d4f9bb32d/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/pthread-ext/26_stack_cas.i [2023-11-12 00:48:19,293 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:48:19,726 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:48:19,727 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b5d324-c006-48fc-a1e2-7d7d4f9bb32d/sv-benchmarks/c/pthread-ext/26_stack_cas.i [2023-11-12 00:48:19,745 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b5d324-c006-48fc-a1e2-7d7d4f9bb32d/bin/utaipan-verify-NcY6lQBIFX/data/aeec30105/71e90a187f34410aaf465c9144ee4cb0/FLAG5f06cbdd0 [2023-11-12 00:48:19,758 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b5d324-c006-48fc-a1e2-7d7d4f9bb32d/bin/utaipan-verify-NcY6lQBIFX/data/aeec30105/71e90a187f34410aaf465c9144ee4cb0 [2023-11-12 00:48:19,761 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:48:19,762 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:48:19,764 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:48:19,764 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:48:19,770 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:48:19,771 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:48:19" (1/1) ... [2023-11-12 00:48:19,772 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@158250e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:19, skipping insertion in model container [2023-11-12 00:48:19,773 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:48:19" (1/1) ... [2023-11-12 00:48:19,838 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:48:20,178 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:48:20,199 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:48:20,292 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:48:20,350 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:48:20,351 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:20 WrapperNode [2023-11-12 00:48:20,351 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:48:20,353 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:48:20,353 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:48:20,353 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:48:20,361 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:20" (1/1) ... [2023-11-12 00:48:20,401 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:20" (1/1) ... [2023-11-12 00:48:20,440 INFO L138 Inliner]: procedures = 177, calls = 48, calls flagged for inlining = 17, calls inlined = 20, statements flattened = 192 [2023-11-12 00:48:20,441 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:48:20,441 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:48:20,442 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:48:20,442 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:48:20,452 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:20" (1/1) ... [2023-11-12 00:48:20,453 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:20" (1/1) ... [2023-11-12 00:48:20,471 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:20" (1/1) ... [2023-11-12 00:48:20,473 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:20" (1/1) ... [2023-11-12 00:48:20,481 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:20" (1/1) ... [2023-11-12 00:48:20,500 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:20" (1/1) ... [2023-11-12 00:48:20,505 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:20" (1/1) ... [2023-11-12 00:48:20,513 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:20" (1/1) ... [2023-11-12 00:48:20,516 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:48:20,520 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:48:20,520 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:48:20,521 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:48:20,522 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:20" (1/1) ... [2023-11-12 00:48:20,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:48:20,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b5d324-c006-48fc-a1e2-7d7d4f9bb32d/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:48:20,556 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b5d324-c006-48fc-a1e2-7d7d4f9bb32d/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:48:20,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02b5d324-c006-48fc-a1e2-7d7d4f9bb32d/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:48:20,591 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:48:20,591 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-12 00:48:20,592 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-12 00:48:20,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:48:20,592 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:48:20,592 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:48:20,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:48:20,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:48:20,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:48:20,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:48:20,595 WARN L210 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 00:48:20,767 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:48:20,775 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:48:21,321 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:48:21,703 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:48:21,703 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-12 00:48:21,707 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:48:21 BoogieIcfgContainer [2023-11-12 00:48:21,708 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:48:21,713 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:48:21,714 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:48:21,718 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:48:21,718 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:48:19" (1/3) ... [2023-11-12 00:48:21,719 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77e7ae6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:48:21, skipping insertion in model container [2023-11-12 00:48:21,719 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:20" (2/3) ... [2023-11-12 00:48:21,722 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77e7ae6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:48:21, skipping insertion in model container [2023-11-12 00:48:21,723 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:48:21" (3/3) ... [2023-11-12 00:48:21,725 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas.i [2023-11-12 00:48:21,752 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:48:21,752 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 42 error locations. [2023-11-12 00:48:21,753 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 00:48:21,919 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 00:48:21,977 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-12 00:48:22,005 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 156 places, 163 transitions, 330 flow [2023-11-12 00:48:22,011 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 156 places, 163 transitions, 330 flow [2023-11-12 00:48:22,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 156 places, 163 transitions, 330 flow [2023-11-12 00:48:22,174 INFO L124 PetriNetUnfolderBase]: 11/179 cut-off events. [2023-11-12 00:48:22,175 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 00:48:22,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183 conditions, 179 events. 11/179 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 367 event pairs, 0 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 139. Up to 4 conditions per place. [2023-11-12 00:48:22,191 INFO L119 LiptonReduction]: Number of co-enabled transitions 4598 [2023-11-12 00:48:31,968 INFO L134 LiptonReduction]: Checked pairs total: 7588 [2023-11-12 00:48:31,968 INFO L136 LiptonReduction]: Total number of compositions: 209 [2023-11-12 00:48:31,981 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 65 places, 69 transitions, 142 flow [2023-11-12 00:48:32,038 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 437 states, 235 states have (on average 3.6638297872340426) internal successors, (861), 436 states have internal predecessors, (861), 0 states have call successors, (0), 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 00:48:32,059 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:48:32,066 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;@54ec5eb2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:48:32,066 INFO L358 AbstractCegarLoop]: Starting to check reachability of 82 error locations. [2023-11-12 00:48:32,070 INFO L276 IsEmpty]: Start isEmpty. Operand has 437 states, 235 states have (on average 3.6638297872340426) internal successors, (861), 436 states have internal predecessors, (861), 0 states have call successors, (0), 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 00:48:32,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-12 00:48:32,076 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:32,077 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-12 00:48:32,077 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-12 00:48:32,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:32,083 INFO L85 PathProgramCache]: Analyzing trace with hash 34114, now seen corresponding path program 1 times [2023-11-12 00:48:32,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:32,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762515811] [2023-11-12 00:48:32,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:32,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:32,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:32,353 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 00:48:32,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:32,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762515811] [2023-11-12 00:48:32,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762515811] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:48:32,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:48:32,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 00:48:32,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918491697] [2023-11-12 00:48:32,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:48:32,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:48:32,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:48:32,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:48:32,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:48:32,394 INFO L87 Difference]: Start difference. First operand has 437 states, 235 states have (on average 3.6638297872340426) internal successors, (861), 436 states have internal predecessors, (861), 0 states have call successors, (0), 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 00:48:32,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:48:32,589 INFO L93 Difference]: Finished difference Result 306 states and 588 transitions. [2023-11-12 00:48:32,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:48:32,592 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 00:48:32,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:48:32,621 INFO L225 Difference]: With dead ends: 306 [2023-11-12 00:48:32,621 INFO L226 Difference]: Without dead ends: 306 [2023-11-12 00:48:32,622 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 00:48:32,630 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 40 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:48:32,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 2 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:48:32,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2023-11-12 00:48:32,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 238. [2023-11-12 00:48:32,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 184 states have (on average 2.6467391304347827) internal successors, (487), 237 states have internal predecessors, (487), 0 states have call successors, (0), 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 00:48:32,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 487 transitions. [2023-11-12 00:48:32,719 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 487 transitions. Word has length 2 [2023-11-12 00:48:32,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:48:32,720 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 487 transitions. [2023-11-12 00:48:32,721 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 00:48:32,721 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 487 transitions. [2023-11-12 00:48:32,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-12 00:48:32,721 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:32,722 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-12 00:48:32,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:48:32,722 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-12 00:48:32,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:32,723 INFO L85 PathProgramCache]: Analyzing trace with hash 34112, now seen corresponding path program 1 times [2023-11-12 00:48:32,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:32,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622834582] [2023-11-12 00:48:32,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:32,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:32,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:32,877 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 00:48:32,877 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:32,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622834582] [2023-11-12 00:48:32,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622834582] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:48:32,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:48:32,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 00:48:32,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070905989] [2023-11-12 00:48:32,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:48:32,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:48:32,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:48:32,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:48:32,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:48:32,882 INFO L87 Difference]: Start difference. First operand 238 states and 487 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 00:48:32,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:48:32,981 INFO L93 Difference]: Finished difference Result 203 states and 394 transitions. [2023-11-12 00:48:32,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:48:32,982 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 00:48:32,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:48:32,985 INFO L225 Difference]: With dead ends: 203 [2023-11-12 00:48:32,985 INFO L226 Difference]: Without dead ends: 203 [2023-11-12 00:48:32,986 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 00:48:32,988 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 42 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:48:32,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 1 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:48:32,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2023-11-12 00:48:33,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2023-11-12 00:48:33,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 170 states have (on average 2.3176470588235296) internal successors, (394), 202 states have internal predecessors, (394), 0 states have call successors, (0), 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 00:48:33,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 394 transitions. [2023-11-12 00:48:33,034 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 394 transitions. Word has length 2 [2023-11-12 00:48:33,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:48:33,035 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 394 transitions. [2023-11-12 00:48:33,037 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 00:48:33,037 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 394 transitions. [2023-11-12 00:48:33,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-12 00:48:33,041 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:33,041 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-12 00:48:33,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:48:33,042 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-12 00:48:33,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:33,043 INFO L85 PathProgramCache]: Analyzing trace with hash 32809731, now seen corresponding path program 1 times [2023-11-12 00:48:33,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:33,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199563414] [2023-11-12 00:48:33,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:33,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:33,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:33,291 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 00:48:33,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:33,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199563414] [2023-11-12 00:48:33,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199563414] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:48:33,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:48:33,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:48:33,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49182329] [2023-11-12 00:48:33,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:48:33,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:48:33,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:48:33,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:48:33,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:48:33,295 INFO L87 Difference]: Start difference. First operand 203 states and 394 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:33,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:48:33,488 INFO L93 Difference]: Finished difference Result 245 states and 469 transitions. [2023-11-12 00:48:33,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:48:33,489 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-12 00:48:33,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:48:33,492 INFO L225 Difference]: With dead ends: 245 [2023-11-12 00:48:33,492 INFO L226 Difference]: Without dead ends: 245 [2023-11-12 00:48:33,492 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 00:48:33,494 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 76 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:48:33,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 4 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:48:33,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2023-11-12 00:48:33,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 214. [2023-11-12 00:48:33,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 182 states have (on average 2.3626373626373627) internal successors, (430), 213 states have internal predecessors, (430), 0 states have call successors, (0), 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 00:48:33,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 430 transitions. [2023-11-12 00:48:33,523 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 430 transitions. Word has length 4 [2023-11-12 00:48:33,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:48:33,524 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 430 transitions. [2023-11-12 00:48:33,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:33,525 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 430 transitions. [2023-11-12 00:48:33,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-12 00:48:33,525 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:33,526 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-12 00:48:33,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:48:33,527 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-12 00:48:33,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:33,528 INFO L85 PathProgramCache]: Analyzing trace with hash 32809732, now seen corresponding path program 1 times [2023-11-12 00:48:33,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:33,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082988929] [2023-11-12 00:48:33,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:33,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:33,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:33,807 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 00:48:33,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:33,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082988929] [2023-11-12 00:48:33,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082988929] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:48:33,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:48:33,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:48:33,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887900004] [2023-11-12 00:48:33,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:48:33,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:48:33,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:48:33,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:48:33,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:48:33,818 INFO L87 Difference]: Start difference. First operand 214 states and 430 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:33,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:48:33,929 INFO L93 Difference]: Finished difference Result 198 states and 396 transitions. [2023-11-12 00:48:33,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:48:33,931 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-12 00:48:33,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:48:33,933 INFO L225 Difference]: With dead ends: 198 [2023-11-12 00:48:33,934 INFO L226 Difference]: Without dead ends: 198 [2023-11-12 00:48:33,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:48:33,940 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 38 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:48:33,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 1 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:48:33,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2023-11-12 00:48:33,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2023-11-12 00:48:33,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 171 states have (on average 2.3157894736842106) internal successors, (396), 197 states have internal predecessors, (396), 0 states have call successors, (0), 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 00:48:33,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 396 transitions. [2023-11-12 00:48:33,960 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 396 transitions. Word has length 4 [2023-11-12 00:48:33,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:48:33,961 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 396 transitions. [2023-11-12 00:48:33,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:33,961 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 396 transitions. [2023-11-12 00:48:33,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-12 00:48:33,962 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:33,962 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-12 00:48:33,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 00:48:33,963 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-12 00:48:33,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:33,964 INFO L85 PathProgramCache]: Analyzing trace with hash 32809572, now seen corresponding path program 1 times [2023-11-12 00:48:33,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:33,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734015766] [2023-11-12 00:48:33,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:33,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:33,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:34,170 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 00:48:34,170 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:34,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734015766] [2023-11-12 00:48:34,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734015766] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:48:34,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:48:34,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:48:34,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101444936] [2023-11-12 00:48:34,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:48:34,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:48:34,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:48:34,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:48:34,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:48:34,174 INFO L87 Difference]: Start difference. First operand 198 states and 396 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:34,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:48:34,344 INFO L93 Difference]: Finished difference Result 214 states and 414 transitions. [2023-11-12 00:48:34,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:48:34,345 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-12 00:48:34,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:48:34,347 INFO L225 Difference]: With dead ends: 214 [2023-11-12 00:48:34,347 INFO L226 Difference]: Without dead ends: 214 [2023-11-12 00:48:34,347 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 00:48:34,348 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 56 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:48:34,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 3 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:48:34,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2023-11-12 00:48:34,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 190. [2023-11-12 00:48:34,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 165 states have (on average 2.315151515151515) internal successors, (382), 189 states have internal predecessors, (382), 0 states have call successors, (0), 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 00:48:34,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 382 transitions. [2023-11-12 00:48:34,361 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 382 transitions. Word has length 4 [2023-11-12 00:48:34,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:48:34,362 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 382 transitions. [2023-11-12 00:48:34,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:34,362 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 382 transitions. [2023-11-12 00:48:34,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-12 00:48:34,363 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:34,364 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-12 00:48:34,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 00:48:34,364 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-12 00:48:34,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:34,365 INFO L85 PathProgramCache]: Analyzing trace with hash 32809573, now seen corresponding path program 1 times [2023-11-12 00:48:34,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:34,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827999781] [2023-11-12 00:48:34,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:34,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:34,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:34,545 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 00:48:34,545 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:34,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827999781] [2023-11-12 00:48:34,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827999781] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:48:34,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:48:34,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:48:34,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496101904] [2023-11-12 00:48:34,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:48:34,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:48:34,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:48:34,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:48:34,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:48:34,554 INFO L87 Difference]: Start difference. First operand 190 states and 382 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:34,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:48:34,630 INFO L93 Difference]: Finished difference Result 182 states and 368 transitions. [2023-11-12 00:48:34,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:48:34,630 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-12 00:48:34,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:48:34,632 INFO L225 Difference]: With dead ends: 182 [2023-11-12 00:48:34,632 INFO L226 Difference]: Without dead ends: 182 [2023-11-12 00:48:34,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:48:34,633 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 66 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:48:34,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 1 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:48:34,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2023-11-12 00:48:34,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2023-11-12 00:48:34,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 159 states have (on average 2.3144654088050314) internal successors, (368), 181 states have internal predecessors, (368), 0 states have call successors, (0), 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 00:48:34,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 368 transitions. [2023-11-12 00:48:34,642 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 368 transitions. Word has length 4 [2023-11-12 00:48:34,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:48:34,642 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 368 transitions. [2023-11-12 00:48:34,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:34,642 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 368 transitions. [2023-11-12 00:48:34,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-12 00:48:34,643 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:34,643 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2023-11-12 00:48:34,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 00:48:34,643 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-12 00:48:34,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:34,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1465323043, now seen corresponding path program 1 times [2023-11-12 00:48:34,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:34,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736269695] [2023-11-12 00:48:34,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:34,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:34,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 00:48:34,657 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 00:48:34,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 00:48:34,694 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-12 00:48:34,694 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 00:48:34,695 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (81 of 82 remaining) [2023-11-12 00:48:34,699 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (80 of 82 remaining) [2023-11-12 00:48:34,700 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (79 of 82 remaining) [2023-11-12 00:48:34,700 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (78 of 82 remaining) [2023-11-12 00:48:34,700 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 82 remaining) [2023-11-12 00:48:34,700 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 82 remaining) [2023-11-12 00:48:34,700 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 82 remaining) [2023-11-12 00:48:34,700 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 82 remaining) [2023-11-12 00:48:34,701 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 82 remaining) [2023-11-12 00:48:34,701 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 82 remaining) [2023-11-12 00:48:34,701 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 82 remaining) [2023-11-12 00:48:34,701 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 82 remaining) [2023-11-12 00:48:34,701 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 82 remaining) [2023-11-12 00:48:34,701 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 82 remaining) [2023-11-12 00:48:34,701 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 82 remaining) [2023-11-12 00:48:34,702 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 82 remaining) [2023-11-12 00:48:34,702 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 82 remaining) [2023-11-12 00:48:34,702 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 82 remaining) [2023-11-12 00:48:34,702 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 82 remaining) [2023-11-12 00:48:34,702 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 82 remaining) [2023-11-12 00:48:34,703 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 82 remaining) [2023-11-12 00:48:34,703 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 82 remaining) [2023-11-12 00:48:34,703 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 82 remaining) [2023-11-12 00:48:34,703 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (58 of 82 remaining) [2023-11-12 00:48:34,703 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 82 remaining) [2023-11-12 00:48:34,703 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 82 remaining) [2023-11-12 00:48:34,704 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (55 of 82 remaining) [2023-11-12 00:48:34,704 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 82 remaining) [2023-11-12 00:48:34,704 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 82 remaining) [2023-11-12 00:48:34,704 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 82 remaining) [2023-11-12 00:48:34,704 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 82 remaining) [2023-11-12 00:48:34,705 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 82 remaining) [2023-11-12 00:48:34,705 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 82 remaining) [2023-11-12 00:48:34,705 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 82 remaining) [2023-11-12 00:48:34,705 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 82 remaining) [2023-11-12 00:48:34,705 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 82 remaining) [2023-11-12 00:48:34,706 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 82 remaining) [2023-11-12 00:48:34,706 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err38ASSERT_VIOLATIONMEMORY_LEAK (44 of 82 remaining) [2023-11-12 00:48:34,706 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 82 remaining) [2023-11-12 00:48:34,706 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 82 remaining) [2023-11-12 00:48:34,706 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 82 remaining) [2023-11-12 00:48:34,707 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 82 remaining) [2023-11-12 00:48:34,708 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (39 of 82 remaining) [2023-11-12 00:48:34,708 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 82 remaining) [2023-11-12 00:48:34,709 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 82 remaining) [2023-11-12 00:48:34,709 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 82 remaining) [2023-11-12 00:48:34,710 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 82 remaining) [2023-11-12 00:48:34,710 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 82 remaining) [2023-11-12 00:48:34,710 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 82 remaining) [2023-11-12 00:48:34,710 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 82 remaining) [2023-11-12 00:48:34,710 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 82 remaining) [2023-11-12 00:48:34,711 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 82 remaining) [2023-11-12 00:48:34,711 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 82 remaining) [2023-11-12 00:48:34,711 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 82 remaining) [2023-11-12 00:48:34,711 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 82 remaining) [2023-11-12 00:48:34,712 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 82 remaining) [2023-11-12 00:48:34,712 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 82 remaining) [2023-11-12 00:48:34,712 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 82 remaining) [2023-11-12 00:48:34,713 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 82 remaining) [2023-11-12 00:48:34,713 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 82 remaining) [2023-11-12 00:48:34,713 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 82 remaining) [2023-11-12 00:48:34,713 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 82 remaining) [2023-11-12 00:48:34,713 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 82 remaining) [2023-11-12 00:48:34,713 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 82 remaining) [2023-11-12 00:48:34,714 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 82 remaining) [2023-11-12 00:48:34,714 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (16 of 82 remaining) [2023-11-12 00:48:34,714 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 82 remaining) [2023-11-12 00:48:34,714 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 82 remaining) [2023-11-12 00:48:34,714 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (13 of 82 remaining) [2023-11-12 00:48:34,715 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 82 remaining) [2023-11-12 00:48:34,715 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 82 remaining) [2023-11-12 00:48:34,715 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 82 remaining) [2023-11-12 00:48:34,715 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 82 remaining) [2023-11-12 00:48:34,715 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 82 remaining) [2023-11-12 00:48:34,715 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 82 remaining) [2023-11-12 00:48:34,716 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 82 remaining) [2023-11-12 00:48:34,716 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 82 remaining) [2023-11-12 00:48:34,719 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 82 remaining) [2023-11-12 00:48:34,720 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 82 remaining) [2023-11-12 00:48:34,720 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err38ASSERT_VIOLATIONMEMORY_LEAK (2 of 82 remaining) [2023-11-12 00:48:34,720 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 82 remaining) [2023-11-12 00:48:34,720 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 82 remaining) [2023-11-12 00:48:34,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 00:48:34,723 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:48:34,725 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 00:48:34,725 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-12 00:48:34,856 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 00:48:34,869 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-12 00:48:34,869 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 271 places, 285 transitions, 580 flow [2023-11-12 00:48:34,869 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 271 places, 285 transitions, 580 flow [2023-11-12 00:48:34,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 271 places, 285 transitions, 580 flow [2023-11-12 00:48:35,013 INFO L124 PetriNetUnfolderBase]: 21/319 cut-off events. [2023-11-12 00:48:35,013 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 00:48:35,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327 conditions, 319 events. 21/319 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 968 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 260. Up to 6 conditions per place. [2023-11-12 00:48:35,056 INFO L119 LiptonReduction]: Number of co-enabled transitions 38720 [2023-11-12 00:48:46,716 INFO L134 LiptonReduction]: Checked pairs total: 108330 [2023-11-12 00:48:46,716 INFO L136 LiptonReduction]: Total number of compositions: 276 [2023-11-12 00:48:46,718 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 134 places, 143 transitions, 296 flow [2023-11-12 00:48:48,050 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 32884 states, 24723 states have (on average 4.088743275492456) internal successors, (101086), 32883 states have internal predecessors, (101086), 0 states have call successors, (0), 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 00:48:48,062 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:48:48,063 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;@54ec5eb2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:48:48,063 INFO L358 AbstractCegarLoop]: Starting to check reachability of 121 error locations. [2023-11-12 00:48:48,134 INFO L276 IsEmpty]: Start isEmpty. Operand has 32884 states, 24723 states have (on average 4.088743275492456) internal successors, (101086), 32883 states have internal predecessors, (101086), 0 states have call successors, (0), 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 00:48:48,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-12 00:48:48,134 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:48,135 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-12 00:48:48,135 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2023-11-12 00:48:48,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:48,136 INFO L85 PathProgramCache]: Analyzing trace with hash 56414, now seen corresponding path program 1 times [2023-11-12 00:48:48,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:48,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558015114] [2023-11-12 00:48:48,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:48,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:48,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:48,154 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 00:48:48,155 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:48,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558015114] [2023-11-12 00:48:48,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558015114] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:48:48,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:48:48,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 00:48:48,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997389339] [2023-11-12 00:48:48,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:48:48,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 00:48:48,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:48:48,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 00:48:48,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:48:48,218 INFO L87 Difference]: Start difference. First operand has 32884 states, 24723 states have (on average 4.088743275492456) internal successors, (101086), 32883 states have internal predecessors, (101086), 0 states have call successors, (0), 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 2 states, 1 states have (on average 2.0) 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 00:48:48,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:48:48,978 INFO L93 Difference]: Finished difference Result 16421 states and 49373 transitions. [2023-11-12 00:48:48,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 00:48:48,979 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 2.0) 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 00:48:48,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:48:49,220 INFO L225 Difference]: With dead ends: 16421 [2023-11-12 00:48:49,221 INFO L226 Difference]: Without dead ends: 16421 [2023-11-12 00:48:49,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:48:49,223 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:48:49,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:48:49,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16421 states. [2023-11-12 00:48:50,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16421 to 16421. [2023-11-12 00:48:50,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16421 states, 14011 states have (on average 3.5238740989222754) internal successors, (49373), 16420 states have internal predecessors, (49373), 0 states have call successors, (0), 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 00:48:50,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16421 states to 16421 states and 49373 transitions. [2023-11-12 00:48:50,303 INFO L78 Accepts]: Start accepts. Automaton has 16421 states and 49373 transitions. Word has length 2 [2023-11-12 00:48:50,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:48:50,303 INFO L495 AbstractCegarLoop]: Abstraction has 16421 states and 49373 transitions. [2023-11-12 00:48:50,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 2.0) 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 00:48:50,304 INFO L276 IsEmpty]: Start isEmpty. Operand 16421 states and 49373 transitions. [2023-11-12 00:48:50,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-12 00:48:50,304 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:50,304 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-12 00:48:50,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 00:48:50,306 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2023-11-12 00:48:50,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:50,307 INFO L85 PathProgramCache]: Analyzing trace with hash 56369, now seen corresponding path program 1 times [2023-11-12 00:48:50,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:50,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462463389] [2023-11-12 00:48:50,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:50,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:50,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:50,341 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 00:48:50,341 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:50,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462463389] [2023-11-12 00:48:50,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462463389] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:48:50,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:48:50,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 00:48:50,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114304616] [2023-11-12 00:48:50,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:48:50,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:48:50,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:48:50,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:48:50,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:48:50,344 INFO L87 Difference]: Start difference. First operand 16421 states and 49373 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 00:48:51,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:48:51,678 INFO L93 Difference]: Finished difference Result 28439 states and 85220 transitions. [2023-11-12 00:48:51,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:48:51,679 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 00:48:51,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:48:52,066 INFO L225 Difference]: With dead ends: 28439 [2023-11-12 00:48:52,066 INFO L226 Difference]: Without dead ends: 28439 [2023-11-12 00:48:52,067 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 00:48:52,068 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 105 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 00:48:52,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 30 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 00:48:52,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28439 states. [2023-11-12 00:48:53,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28439 to 22195. [2023-11-12 00:48:53,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22195 states, 19842 states have (on average 3.50604777744179) internal successors, (69567), 22194 states have internal predecessors, (69567), 0 states have call successors, (0), 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 00:48:53,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22195 states to 22195 states and 69567 transitions. [2023-11-12 00:48:53,409 INFO L78 Accepts]: Start accepts. Automaton has 22195 states and 69567 transitions. Word has length 2 [2023-11-12 00:48:53,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:48:53,409 INFO L495 AbstractCegarLoop]: Abstraction has 22195 states and 69567 transitions. [2023-11-12 00:48:53,409 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 00:48:53,410 INFO L276 IsEmpty]: Start isEmpty. Operand 22195 states and 69567 transitions. [2023-11-12 00:48:53,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-12 00:48:53,410 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:53,410 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-12 00:48:53,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 00:48:53,411 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2023-11-12 00:48:53,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:53,411 INFO L85 PathProgramCache]: Analyzing trace with hash 56370, now seen corresponding path program 1 times [2023-11-12 00:48:53,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:53,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985824351] [2023-11-12 00:48:53,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:53,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:53,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:53,463 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 00:48:53,463 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:53,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985824351] [2023-11-12 00:48:53,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985824351] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:48:53,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:48:53,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 00:48:53,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750500712] [2023-11-12 00:48:53,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:48:53,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:48:53,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:48:53,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:48:53,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:48:53,467 INFO L87 Difference]: Start difference. First operand 22195 states and 69567 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 00:48:53,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:48:53,939 INFO L93 Difference]: Finished difference Result 19842 states and 60196 transitions. [2023-11-12 00:48:53,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:48:53,940 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 00:48:53,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:48:54,065 INFO L225 Difference]: With dead ends: 19842 [2023-11-12 00:48:54,065 INFO L226 Difference]: Without dead ends: 19842 [2023-11-12 00:48:54,066 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 00:48:54,067 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 109 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:48:54,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 15 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:48:54,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19842 states. [2023-11-12 00:48:54,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19842 to 19842. [2023-11-12 00:48:54,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19842 states, 18302 states have (on average 3.28903944924052) internal successors, (60196), 19841 states have internal predecessors, (60196), 0 states have call successors, (0), 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 00:48:54,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19842 states to 19842 states and 60196 transitions. [2023-11-12 00:48:54,935 INFO L78 Accepts]: Start accepts. Automaton has 19842 states and 60196 transitions. Word has length 2 [2023-11-12 00:48:54,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:48:54,935 INFO L495 AbstractCegarLoop]: Abstraction has 19842 states and 60196 transitions. [2023-11-12 00:48:54,936 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 00:48:54,936 INFO L276 IsEmpty]: Start isEmpty. Operand 19842 states and 60196 transitions. [2023-11-12 00:48:54,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-12 00:48:54,936 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:54,936 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-12 00:48:54,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-12 00:48:54,937 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2023-11-12 00:48:54,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:54,937 INFO L85 PathProgramCache]: Analyzing trace with hash 54219277, now seen corresponding path program 1 times [2023-11-12 00:48:54,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:54,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990819505] [2023-11-12 00:48:54,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:54,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:54,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:55,012 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 00:48:55,012 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:55,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990819505] [2023-11-12 00:48:55,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990819505] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:48:55,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:48:55,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:48:55,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149872582] [2023-11-12 00:48:55,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:48:55,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:48:55,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:48:55,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:48:55,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:48:55,015 INFO L87 Difference]: Start difference. First operand 19842 states and 60196 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:55,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:48:55,891 INFO L93 Difference]: Finished difference Result 37560 states and 113231 transitions. [2023-11-12 00:48:55,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:48:55,892 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-12 00:48:55,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:48:56,260 INFO L225 Difference]: With dead ends: 37560 [2023-11-12 00:48:56,261 INFO L226 Difference]: Without dead ends: 37560 [2023-11-12 00:48:56,261 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 00:48:56,262 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 275 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 00:48:56,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 60 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 00:48:56,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37560 states. [2023-11-12 00:48:57,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37560 to 21651. [2023-11-12 00:48:57,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21651 states, 20135 states have (on average 3.3628010926247827) internal successors, (67710), 21650 states have internal predecessors, (67710), 0 states have call successors, (0), 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 00:48:57,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21651 states to 21651 states and 67710 transitions. [2023-11-12 00:48:57,548 INFO L78 Accepts]: Start accepts. Automaton has 21651 states and 67710 transitions. Word has length 4 [2023-11-12 00:48:57,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:48:57,549 INFO L495 AbstractCegarLoop]: Abstraction has 21651 states and 67710 transitions. [2023-11-12 00:48:57,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:57,549 INFO L276 IsEmpty]: Start isEmpty. Operand 21651 states and 67710 transitions. [2023-11-12 00:48:57,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-12 00:48:57,550 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:57,551 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-12 00:48:57,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-12 00:48:57,551 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2023-11-12 00:48:57,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:57,552 INFO L85 PathProgramCache]: Analyzing trace with hash 54219278, now seen corresponding path program 1 times [2023-11-12 00:48:57,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:57,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784473875] [2023-11-12 00:48:57,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:57,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:57,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:57,729 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 00:48:57,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:57,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784473875] [2023-11-12 00:48:57,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784473875] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:48:57,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:48:57,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:48:57,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126770443] [2023-11-12 00:48:57,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:48:57,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:48:57,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:48:57,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:48:57,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:48:57,734 INFO L87 Difference]: Start difference. First operand 21651 states and 67710 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:58,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:48:58,141 INFO L93 Difference]: Finished difference Result 20207 states and 62801 transitions. [2023-11-12 00:48:58,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:48:58,142 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-12 00:48:58,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:48:58,240 INFO L225 Difference]: With dead ends: 20207 [2023-11-12 00:48:58,240 INFO L226 Difference]: Without dead ends: 20207 [2023-11-12 00:48:58,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:48:58,241 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 208 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:48:58,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 15 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:48:58,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20207 states. [2023-11-12 00:48:59,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20207 to 20207. [2023-11-12 00:48:59,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20207 states, 18875 states have (on average 3.327205298013245) internal successors, (62801), 20206 states have internal predecessors, (62801), 0 states have call successors, (0), 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 00:48:59,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20207 states to 20207 states and 62801 transitions. [2023-11-12 00:48:59,292 INFO L78 Accepts]: Start accepts. Automaton has 20207 states and 62801 transitions. Word has length 4 [2023-11-12 00:48:59,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:48:59,292 INFO L495 AbstractCegarLoop]: Abstraction has 20207 states and 62801 transitions. [2023-11-12 00:48:59,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:59,293 INFO L276 IsEmpty]: Start isEmpty. Operand 20207 states and 62801 transitions. [2023-11-12 00:48:59,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-12 00:48:59,293 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:59,293 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-12 00:48:59,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-12 00:48:59,294 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2023-11-12 00:48:59,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:59,294 INFO L85 PathProgramCache]: Analyzing trace with hash 565164611, now seen corresponding path program 1 times [2023-11-12 00:48:59,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:59,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269828402] [2023-11-12 00:48:59,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:59,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:59,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:59,403 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 00:48:59,404 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:59,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269828402] [2023-11-12 00:48:59,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269828402] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:48:59,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:48:59,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 00:48:59,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257947955] [2023-11-12 00:48:59,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:48:59,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:48:59,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:48:59,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:48:59,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:48:59,406 INFO L87 Difference]: Start difference. First operand 20207 states and 62801 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:59,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:48:59,714 INFO L93 Difference]: Finished difference Result 17114 states and 53138 transitions. [2023-11-12 00:48:59,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:48:59,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-12 00:48:59,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:48:59,785 INFO L225 Difference]: With dead ends: 17114 [2023-11-12 00:48:59,785 INFO L226 Difference]: Without dead ends: 17114 [2023-11-12 00:48:59,786 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 00:48:59,786 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 93 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:48:59,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 15 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:49:00,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17114 states. [2023-11-12 00:49:00,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17114 to 17114. [2023-11-12 00:49:00,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17114 states, 16156 states have (on average 3.2890566972022777) internal successors, (53138), 17113 states have internal predecessors, (53138), 0 states have call successors, (0), 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 00:49:00,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17114 states to 17114 states and 53138 transitions. [2023-11-12 00:49:00,688 INFO L78 Accepts]: Start accepts. Automaton has 17114 states and 53138 transitions. Word has length 6 [2023-11-12 00:49:00,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:00,689 INFO L495 AbstractCegarLoop]: Abstraction has 17114 states and 53138 transitions. [2023-11-12 00:49:00,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:49:00,689 INFO L276 IsEmpty]: Start isEmpty. Operand 17114 states and 53138 transitions. [2023-11-12 00:49:00,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-12 00:49:00,689 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:00,689 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-12 00:49:00,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-12 00:49:00,690 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2023-11-12 00:49:00,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:00,690 INFO L85 PathProgramCache]: Analyzing trace with hash 565164610, now seen corresponding path program 1 times [2023-11-12 00:49:00,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:00,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515782218] [2023-11-12 00:49:00,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:00,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:00,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:00,782 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 00:49:00,783 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:00,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515782218] [2023-11-12 00:49:00,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515782218] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:00,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:49:00,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:49:00,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972691059] [2023-11-12 00:49:00,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:00,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:49:00,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:00,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:49:00,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:49:00,786 INFO L87 Difference]: Start difference. First operand 17114 states and 53138 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)