./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028cade9-74ee-42e4-b20e-84ad0fbaa0dc/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028cade9-74ee-42e4-b20e-84ad0fbaa0dc/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028cade9-74ee-42e4-b20e-84ad0fbaa0dc/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028cade9-74ee-42e4-b20e-84ad0fbaa0dc/bin/utaipan-verify-DbMuA5NWw2/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028cade9-74ee-42e4-b20e-84ad0fbaa0dc/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028cade9-74ee-42e4-b20e-84ad0fbaa0dc/bin/utaipan-verify-DbMuA5NWw2 --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 83c7202603a0719c5812e4d7043f4665de4d954c89c656bd6312ac9e8fdcb494 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 11:20:55,615 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 11:20:55,721 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028cade9-74ee-42e4-b20e-84ad0fbaa0dc/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-02 11:20:55,729 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 11:20:55,730 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 11:20:55,765 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 11:20:55,766 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 11:20:55,767 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 11:20:55,768 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 11:20:55,769 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 11:20:55,769 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 11:20:55,770 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 11:20:55,770 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 11:20:55,771 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 11:20:55,773 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 11:20:55,773 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 11:20:55,774 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 11:20:55,774 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 11:20:55,775 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 11:20:55,775 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 11:20:55,779 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 11:20:55,780 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 11:20:55,781 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-02 11:20:55,781 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-02 11:20:55,781 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 11:20:55,782 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 11:20:55,782 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 11:20:55,782 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 11:20:55,782 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 11:20:55,783 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-02 11:20:55,783 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-02 11:20:55,784 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-02 11:20:55,784 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 11:20:55,784 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-02 11:20:55,785 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 11:20:55,786 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-02 11:20:55,786 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 11:20:55,787 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 11:20:55,788 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 11:20:55,788 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 11:20:55,789 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 11:20:55,789 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 11:20:55,790 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 11:20:55,790 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 11:20:55,790 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 11:20:55,791 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 11:20:55,791 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 11:20:55,792 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 11:20:55,792 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 11:20:55,792 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_028cade9-74ee-42e4-b20e-84ad0fbaa0dc/bin/utaipan-verify-DbMuA5NWw2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028cade9-74ee-42e4-b20e-84ad0fbaa0dc/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83c7202603a0719c5812e4d7043f4665de4d954c89c656bd6312ac9e8fdcb494 [2024-11-02 11:20:56,074 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 11:20:56,105 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 11:20:56,108 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 11:20:56,109 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 11:20:56,110 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 11:20:56,111 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028cade9-74ee-42e4-b20e-84ad0fbaa0dc/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c Unable to find full path for "g++" [2024-11-02 11:20:58,194 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 11:20:58,470 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 11:20:58,471 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028cade9-74ee-42e4-b20e-84ad0fbaa0dc/sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c [2024-11-02 11:20:58,480 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028cade9-74ee-42e4-b20e-84ad0fbaa0dc/bin/utaipan-verify-DbMuA5NWw2/data/a969f3a3d/fc64b670c15a415496c67e3b14d33266/FLAG0e5dc7acf [2024-11-02 11:20:58,494 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028cade9-74ee-42e4-b20e-84ad0fbaa0dc/bin/utaipan-verify-DbMuA5NWw2/data/a969f3a3d/fc64b670c15a415496c67e3b14d33266 [2024-11-02 11:20:58,497 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 11:20:58,499 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 11:20:58,500 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 11:20:58,500 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 11:20:58,505 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 11:20:58,506 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:20:58" (1/1) ... [2024-11-02 11:20:58,507 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15f74af3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:20:58, skipping insertion in model container [2024-11-02 11:20:58,507 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:20:58" (1/1) ... [2024-11-02 11:20:58,547 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 11:20:58,908 WARN L1053 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-02 11:20:58,918 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 11:20:58,931 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 11:20:59,002 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 11:20:59,040 INFO L204 MainTranslator]: Completed translation [2024-11-02 11:20:59,041 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:20:59 WrapperNode [2024-11-02 11:20:59,041 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 11:20:59,042 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 11:20:59,046 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 11:20:59,046 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 11:20:59,066 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:20:59" (1/1) ... [2024-11-02 11:20:59,080 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:20:59" (1/1) ... [2024-11-02 11:20:59,158 INFO L138 Inliner]: procedures = 24, calls = 54, calls flagged for inlining = 21, calls inlined = 25, statements flattened = 339 [2024-11-02 11:20:59,158 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 11:20:59,159 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 11:20:59,159 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 11:20:59,159 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 11:20:59,176 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:20:59" (1/1) ... [2024-11-02 11:20:59,176 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:20:59" (1/1) ... [2024-11-02 11:20:59,180 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:20:59" (1/1) ... [2024-11-02 11:20:59,181 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:20:59" (1/1) ... [2024-11-02 11:20:59,193 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:20:59" (1/1) ... [2024-11-02 11:20:59,198 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:20:59" (1/1) ... [2024-11-02 11:20:59,201 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:20:59" (1/1) ... [2024-11-02 11:20:59,203 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:20:59" (1/1) ... [2024-11-02 11:20:59,207 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 11:20:59,208 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 11:20:59,208 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 11:20:59,208 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 11:20:59,209 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:20:59" (1/1) ... [2024-11-02 11:20:59,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 11:20:59,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028cade9-74ee-42e4-b20e-84ad0fbaa0dc/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:20:59,251 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028cade9-74ee-42e4-b20e-84ad0fbaa0dc/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 11:20:59,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028cade9-74ee-42e4-b20e-84ad0fbaa0dc/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 11:20:59,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 11:20:59,292 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-02 11:20:59,293 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-02 11:20:59,293 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-02 11:20:59,295 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-02 11:20:59,295 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-02 11:20:59,296 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-02 11:20:59,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 11:20:59,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-02 11:20:59,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-02 11:20:59,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-02 11:20:59,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-02 11:20:59,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 11:20:59,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 11:20:59,297 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-02 11:20:59,299 WARN L207 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-02 11:20:59,489 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 11:20:59,492 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 11:21:00,277 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-02 11:21:00,277 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 11:21:00,790 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 11:21:00,791 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-02 11:21:00,792 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:21:00 BoogieIcfgContainer [2024-11-02 11:21:00,792 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 11:21:00,794 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 11:21:00,796 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 11:21:00,799 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 11:21:00,800 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:20:58" (1/3) ... [2024-11-02 11:21:00,801 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17d8592a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:21:00, skipping insertion in model container [2024-11-02 11:21:00,801 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:20:59" (2/3) ... [2024-11-02 11:21:00,803 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17d8592a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:21:00, skipping insertion in model container [2024-11-02 11:21:00,803 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:21:00" (3/3) ... [2024-11-02 11:21:00,804 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-commit-1.wvr-bad.c [2024-11-02 11:21:00,826 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 11:21:00,826 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2024-11-02 11:21:00,827 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-02 11:21:00,909 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-02 11:21:00,947 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 81 places, 88 transitions, 197 flow [2024-11-02 11:21:01,326 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 6455 states, 6223 states have (on average 4.307086614173229) internal successors, (26803), 6454 states have internal predecessors, (26803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:01,366 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 11:21:01,374 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5e3d6422, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 11:21:01,374 INFO L334 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2024-11-02 11:21:01,401 INFO L276 IsEmpty]: Start isEmpty. Operand has 6455 states, 6223 states have (on average 4.307086614173229) internal successors, (26803), 6454 states have internal predecessors, (26803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:01,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-02 11:21:01,414 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:21:01,415 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-02 11:21:01,415 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-02 11:21:01,420 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:21:01,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1042750, now seen corresponding path program 1 times [2024-11-02 11:21:01,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:21:01,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491891241] [2024-11-02 11:21:01,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:01,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:21:01,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:01,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:21:01,777 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:21:01,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491891241] [2024-11-02 11:21:01,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491891241] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:21:01,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:21:01,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-02 11:21:01,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354787940] [2024-11-02 11:21:01,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:21:01,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:21:01,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:21:01,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:21:01,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:21:01,881 INFO L87 Difference]: Start difference. First operand has 6455 states, 6223 states have (on average 4.307086614173229) internal successors, (26803), 6454 states have internal predecessors, (26803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:02,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:21:02,247 INFO L93 Difference]: Finished difference Result 8898 states and 35480 transitions. [2024-11-02 11:21:02,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:21:02,250 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2024-11-02 11:21:02,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:21:02,346 INFO L225 Difference]: With dead ends: 8898 [2024-11-02 11:21:02,347 INFO L226 Difference]: Without dead ends: 6450 [2024-11-02 11:21:02,362 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:21:02,368 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 8 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 11:21:02,369 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 34 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 11:21:02,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6450 states. [2024-11-02 11:21:02,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6450 to 6450. [2024-11-02 11:21:02,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6450 states, 6222 states have (on average 4.091771134683381) internal successors, (25459), 6449 states have internal predecessors, (25459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:02,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6450 states to 6450 states and 25459 transitions. [2024-11-02 11:21:02,964 INFO L78 Accepts]: Start accepts. Automaton has 6450 states and 25459 transitions. Word has length 3 [2024-11-02 11:21:02,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:21:02,966 INFO L471 AbstractCegarLoop]: Abstraction has 6450 states and 25459 transitions. [2024-11-02 11:21:02,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:02,968 INFO L276 IsEmpty]: Start isEmpty. Operand 6450 states and 25459 transitions. [2024-11-02 11:21:02,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-02 11:21:02,970 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:21:02,970 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-02 11:21:02,971 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 11:21:02,971 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-02 11:21:02,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:21:02,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1042751, now seen corresponding path program 1 times [2024-11-02 11:21:02,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:21:02,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647825790] [2024-11-02 11:21:02,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:02,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:21:03,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:03,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:21:03,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:21:03,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647825790] [2024-11-02 11:21:03,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647825790] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:21:03,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:21:03,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 11:21:03,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064936122] [2024-11-02 11:21:03,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:21:03,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 11:21:03,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:21:03,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 11:21:03,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 11:21:03,364 INFO L87 Difference]: Start difference. First operand 6450 states and 25459 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:03,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:21:03,872 INFO L93 Difference]: Finished difference Result 6450 states and 25459 transitions. [2024-11-02 11:21:03,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 11:21:03,873 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2024-11-02 11:21:03,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:21:03,960 INFO L225 Difference]: With dead ends: 6450 [2024-11-02 11:21:03,963 INFO L226 Difference]: Without dead ends: 6447 [2024-11-02 11:21:03,968 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-02 11:21:03,969 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 3 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-02 11:21:03,970 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 51 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-02 11:21:03,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6447 states. [2024-11-02 11:21:04,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6447 to 6447. [2024-11-02 11:21:04,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6447 states, 6222 states have (on average 4.091288974606236) internal successors, (25456), 6446 states have internal predecessors, (25456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:04,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6447 states to 6447 states and 25456 transitions. [2024-11-02 11:21:04,580 INFO L78 Accepts]: Start accepts. Automaton has 6447 states and 25456 transitions. Word has length 3 [2024-11-02 11:21:04,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:21:04,581 INFO L471 AbstractCegarLoop]: Abstraction has 6447 states and 25456 transitions. [2024-11-02 11:21:04,582 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:04,582 INFO L276 IsEmpty]: Start isEmpty. Operand 6447 states and 25456 transitions. [2024-11-02 11:21:04,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-02 11:21:04,583 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:21:04,583 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:21:04,583 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 11:21:04,584 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-02 11:21:04,586 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:21:04,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1084028577, now seen corresponding path program 1 times [2024-11-02 11:21:04,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:21:04,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656426724] [2024-11-02 11:21:04,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:04,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:21:04,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:04,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:21:04,794 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:21:04,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656426724] [2024-11-02 11:21:04,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656426724] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:21:04,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:21:04,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-02 11:21:04,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940595041] [2024-11-02 11:21:04,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:21:04,800 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:21:04,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:21:04,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:21:04,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:21:04,802 INFO L87 Difference]: Start difference. First operand 6447 states and 25456 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:05,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:21:05,393 INFO L93 Difference]: Finished difference Result 18029 states and 72778 transitions. [2024-11-02 11:21:05,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:21:05,396 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-02 11:21:05,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:21:05,523 INFO L225 Difference]: With dead ends: 18029 [2024-11-02 11:21:05,523 INFO L226 Difference]: Without dead ends: 11574 [2024-11-02 11:21:05,541 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:21:05,543 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 57 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 11:21:05,543 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 34 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 11:21:05,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11574 states. [2024-11-02 11:21:06,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11574 to 9543. [2024-11-02 11:21:06,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9543 states, 9270 states have (on average 4.24638619201726) internal successors, (39364), 9542 states have internal predecessors, (39364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:06,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9543 states to 9543 states and 39364 transitions. [2024-11-02 11:21:06,222 INFO L78 Accepts]: Start accepts. Automaton has 9543 states and 39364 transitions. Word has length 9 [2024-11-02 11:21:06,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:21:06,222 INFO L471 AbstractCegarLoop]: Abstraction has 9543 states and 39364 transitions. [2024-11-02 11:21:06,223 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:06,223 INFO L276 IsEmpty]: Start isEmpty. Operand 9543 states and 39364 transitions. [2024-11-02 11:21:06,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-02 11:21:06,225 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:21:06,226 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:21:06,226 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 11:21:06,226 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-02 11:21:06,230 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:21:06,230 INFO L85 PathProgramCache]: Analyzing trace with hash -754850353, now seen corresponding path program 1 times [2024-11-02 11:21:06,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:21:06,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299103392] [2024-11-02 11:21:06,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:06,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:21:06,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:06,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:21:06,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:21:06,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299103392] [2024-11-02 11:21:06,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299103392] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:21:06,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:21:06,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 11:21:06,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677753585] [2024-11-02 11:21:06,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:21:06,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:21:06,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:21:06,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:21:06,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:21:06,306 INFO L87 Difference]: Start difference. First operand 9543 states and 39364 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:06,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:21:06,799 INFO L93 Difference]: Finished difference Result 18913 states and 76470 transitions. [2024-11-02 11:21:06,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:21:06,800 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-02 11:21:06,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:21:06,905 INFO L225 Difference]: With dead ends: 18913 [2024-11-02 11:21:06,905 INFO L226 Difference]: Without dead ends: 9370 [2024-11-02 11:21:06,926 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:21:06,927 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 49 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 11:21:06,928 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 25 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 11:21:06,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9370 states. [2024-11-02 11:21:07,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9370 to 8587. [2024-11-02 11:21:07,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8587 states, 8338 states have (on average 4.06644279203646) internal successors, (33906), 8586 states have internal predecessors, (33906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:07,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8587 states to 8587 states and 33906 transitions. [2024-11-02 11:21:07,418 INFO L78 Accepts]: Start accepts. Automaton has 8587 states and 33906 transitions. Word has length 10 [2024-11-02 11:21:07,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:21:07,419 INFO L471 AbstractCegarLoop]: Abstraction has 8587 states and 33906 transitions. [2024-11-02 11:21:07,419 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:07,419 INFO L276 IsEmpty]: Start isEmpty. Operand 8587 states and 33906 transitions. [2024-11-02 11:21:07,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-02 11:21:07,420 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:21:07,421 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:21:07,421 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-02 11:21:07,421 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-02 11:21:07,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:21:07,422 INFO L85 PathProgramCache]: Analyzing trace with hash -44025330, now seen corresponding path program 1 times [2024-11-02 11:21:07,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:21:07,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261587115] [2024-11-02 11:21:07,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:07,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:21:07,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:07,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:21:07,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:21:07,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261587115] [2024-11-02 11:21:07,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261587115] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:21:07,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:21:07,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 11:21:07,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527234891] [2024-11-02 11:21:07,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:21:07,651 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:21:07,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:21:07,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:21:07,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:21:07,652 INFO L87 Difference]: Start difference. First operand 8587 states and 33906 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:08,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:21:08,038 INFO L93 Difference]: Finished difference Result 23061 states and 93004 transitions. [2024-11-02 11:21:08,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:21:08,039 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-02 11:21:08,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:21:08,159 INFO L225 Difference]: With dead ends: 23061 [2024-11-02 11:21:08,160 INFO L226 Difference]: Without dead ends: 14468 [2024-11-02 11:21:08,182 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:21:08,184 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 60 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 11:21:08,187 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 34 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 11:21:08,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14468 states. [2024-11-02 11:21:08,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14468 to 12013. [2024-11-02 11:21:08,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12013 states, 11726 states have (on average 4.210813576667235) internal successors, (49376), 12012 states have internal predecessors, (49376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:08,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12013 states to 12013 states and 49376 transitions. [2024-11-02 11:21:08,975 INFO L78 Accepts]: Start accepts. Automaton has 12013 states and 49376 transitions. Word has length 11 [2024-11-02 11:21:08,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:21:08,976 INFO L471 AbstractCegarLoop]: Abstraction has 12013 states and 49376 transitions. [2024-11-02 11:21:08,976 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:08,977 INFO L276 IsEmpty]: Start isEmpty. Operand 12013 states and 49376 transitions. [2024-11-02 11:21:08,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-02 11:21:08,979 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:21:08,980 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:21:08,980 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-02 11:21:08,980 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-02 11:21:08,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:21:08,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1364783077, now seen corresponding path program 1 times [2024-11-02 11:21:08,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:21:08,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199404387] [2024-11-02 11:21:08,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:08,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:21:09,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:09,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:21:09,036 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:21:09,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199404387] [2024-11-02 11:21:09,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199404387] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:21:09,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:21:09,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 11:21:09,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221002455] [2024-11-02 11:21:09,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:21:09,038 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:21:09,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:21:09,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:21:09,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:21:09,040 INFO L87 Difference]: Start difference. First operand 12013 states and 49376 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:09,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:21:09,725 INFO L93 Difference]: Finished difference Result 24493 states and 99678 transitions. [2024-11-02 11:21:09,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:21:09,730 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-02 11:21:09,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:21:09,892 INFO L225 Difference]: With dead ends: 24493 [2024-11-02 11:21:09,893 INFO L226 Difference]: Without dead ends: 12458 [2024-11-02 11:21:09,918 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:21:09,921 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 57 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 11:21:09,922 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 29 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 11:21:09,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12458 states. [2024-11-02 11:21:10,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12458 to 11315. [2024-11-02 11:21:10,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11315 states, 11038 states have (on average 4.088421815546295) internal successors, (45128), 11314 states have internal predecessors, (45128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:10,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11315 states to 11315 states and 45128 transitions. [2024-11-02 11:21:10,506 INFO L78 Accepts]: Start accepts. Automaton has 11315 states and 45128 transitions. Word has length 12 [2024-11-02 11:21:10,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:21:10,506 INFO L471 AbstractCegarLoop]: Abstraction has 11315 states and 45128 transitions. [2024-11-02 11:21:10,506 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:10,507 INFO L276 IsEmpty]: Start isEmpty. Operand 11315 states and 45128 transitions. [2024-11-02 11:21:10,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-02 11:21:10,510 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:21:10,510 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:21:10,510 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-02 11:21:10,510 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-02 11:21:10,511 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:21:10,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1679102784, now seen corresponding path program 1 times [2024-11-02 11:21:10,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:21:10,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083968604] [2024-11-02 11:21:10,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:10,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:21:10,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:10,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:21:10,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:21:10,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083968604] [2024-11-02 11:21:10,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083968604] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:21:10,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:21:10,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 11:21:10,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044915468] [2024-11-02 11:21:10,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:21:10,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 11:21:10,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:21:10,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 11:21:10,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 11:21:10,856 INFO L87 Difference]: Start difference. First operand 11315 states and 45128 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:11,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:21:11,217 INFO L93 Difference]: Finished difference Result 22924 states and 91196 transitions. [2024-11-02 11:21:11,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 11:21:11,218 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-02 11:21:11,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:21:11,493 INFO L225 Difference]: With dead ends: 22924 [2024-11-02 11:21:11,497 INFO L226 Difference]: Without dead ends: 12038 [2024-11-02 11:21:11,532 INFO L431 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 [2024-11-02 11:21:11,536 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 33 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 11:21:11,536 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 51 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 11:21:11,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12038 states. [2024-11-02 11:21:11,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12038 to 11800. [2024-11-02 11:21:11,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11800 states, 11523 states have (on average 4.066649310075501) internal successors, (46860), 11799 states have internal predecessors, (46860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:12,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11800 states to 11800 states and 46860 transitions. [2024-11-02 11:21:12,043 INFO L78 Accepts]: Start accepts. Automaton has 11800 states and 46860 transitions. Word has length 13 [2024-11-02 11:21:12,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:21:12,044 INFO L471 AbstractCegarLoop]: Abstraction has 11800 states and 46860 transitions. [2024-11-02 11:21:12,044 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:12,044 INFO L276 IsEmpty]: Start isEmpty. Operand 11800 states and 46860 transitions. [2024-11-02 11:21:12,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-02 11:21:12,046 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:21:12,047 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:21:12,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-02 11:21:12,047 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread3Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-02 11:21:12,048 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:21:12,048 INFO L85 PathProgramCache]: Analyzing trace with hash -512576584, now seen corresponding path program 1 times [2024-11-02 11:21:12,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:21:12,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827236779] [2024-11-02 11:21:12,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:12,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:21:12,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:12,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:21:12,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:21:12,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827236779] [2024-11-02 11:21:12,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827236779] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:21:12,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:21:12,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 11:21:12,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44037919] [2024-11-02 11:21:12,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:21:12,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:21:12,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:21:12,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:21:12,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:21:12,108 INFO L87 Difference]: Start difference. First operand 11800 states and 46860 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:12,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:21:12,569 INFO L93 Difference]: Finished difference Result 27521 states and 109919 transitions. [2024-11-02 11:21:12,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:21:12,569 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-02 11:21:12,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:21:12,707 INFO L225 Difference]: With dead ends: 27521 [2024-11-02 11:21:12,707 INFO L226 Difference]: Without dead ends: 15696 [2024-11-02 11:21:12,744 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:21:12,745 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 55 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 11:21:12,746 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 39 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 11:21:13,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15696 states. [2024-11-02 11:21:13,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15696 to 13925. [2024-11-02 11:21:13,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13925 states, 13652 states have (on average 4.097861119249926) internal successors, (55944), 13924 states have internal predecessors, (55944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:13,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13925 states to 13925 states and 55944 transitions. [2024-11-02 11:21:13,678 INFO L78 Accepts]: Start accepts. Automaton has 13925 states and 55944 transitions. Word has length 14 [2024-11-02 11:21:13,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:21:13,679 INFO L471 AbstractCegarLoop]: Abstraction has 13925 states and 55944 transitions. [2024-11-02 11:21:13,679 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:13,679 INFO L276 IsEmpty]: Start isEmpty. Operand 13925 states and 55944 transitions. [2024-11-02 11:21:13,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-02 11:21:13,680 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:21:13,680 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:21:13,680 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-02 11:21:13,680 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-02 11:21:13,681 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:21:13,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1715582746, now seen corresponding path program 1 times [2024-11-02 11:21:13,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:21:13,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882780035] [2024-11-02 11:21:13,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:13,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:21:13,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:13,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 11:21:13,959 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:21:13,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882780035] [2024-11-02 11:21:13,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882780035] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:21:13,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:21:13,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 11:21:13,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691453535] [2024-11-02 11:21:13,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:21:13,961 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 11:21:13,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:21:13,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 11:21:13,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-02 11:21:13,962 INFO L87 Difference]: Start difference. First operand 13925 states and 55944 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:14,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:21:14,177 INFO L93 Difference]: Finished difference Result 13925 states and 55944 transitions. [2024-11-02 11:21:14,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 11:21:14,178 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-02 11:21:14,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:21:14,555 INFO L225 Difference]: With dead ends: 13925 [2024-11-02 11:21:14,555 INFO L226 Difference]: Without dead ends: 11317 [2024-11-02 11:21:14,560 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-02 11:21:14,561 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 115 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:21:14,561 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 34 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:21:14,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11317 states. [2024-11-02 11:21:14,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11317 to 11317. [2024-11-02 11:21:14,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11317 states, 11176 states have (on average 4.102183249821045) internal successors, (45846), 11316 states have internal predecessors, (45846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:14,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11317 states to 11317 states and 45846 transitions. [2024-11-02 11:21:14,898 INFO L78 Accepts]: Start accepts. Automaton has 11317 states and 45846 transitions. Word has length 15 [2024-11-02 11:21:14,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:21:14,898 INFO L471 AbstractCegarLoop]: Abstraction has 11317 states and 45846 transitions. [2024-11-02 11:21:14,899 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:14,899 INFO L276 IsEmpty]: Start isEmpty. Operand 11317 states and 45846 transitions. [2024-11-02 11:21:14,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-02 11:21:14,900 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:21:14,900 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:21:14,900 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-02 11:21:14,900 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-02 11:21:14,900 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:21:14,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1715582745, now seen corresponding path program 1 times [2024-11-02 11:21:14,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:21:14,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267606320] [2024-11-02 11:21:14,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:14,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:21:14,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:15,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:21:15,391 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:21:15,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267606320] [2024-11-02 11:21:15,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267606320] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:21:15,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117986555] [2024-11-02 11:21:15,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:15,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:21:15,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028cade9-74ee-42e4-b20e-84ad0fbaa0dc/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:21:15,394 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028cade9-74ee-42e4-b20e-84ad0fbaa0dc/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:21:15,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028cade9-74ee-42e4-b20e-84ad0fbaa0dc/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 11:21:15,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:15,510 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-02 11:21:15,515 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:21:15,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-02 11:21:15,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 11:21:15,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-02 11:21:15,734 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-02 11:21:15,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-02 11:21:15,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 11:21:15,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-02 11:21:15,792 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-02 11:21:15,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-02 11:21:15,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:21:15,877 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 11:21:15,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117986555] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:21:15,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 11:21:15,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 9 [2024-11-02 11:21:15,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499651086] [2024-11-02 11:21:15,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:21:15,879 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-02 11:21:15,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:21:15,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-02 11:21:15,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-02 11:21:15,880 INFO L87 Difference]: Start difference. First operand 11317 states and 45846 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:16,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:21:16,223 INFO L93 Difference]: Finished difference Result 11317 states and 45846 transitions. [2024-11-02 11:21:16,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 11:21:16,223 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-02 11:21:16,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:21:16,307 INFO L225 Difference]: With dead ends: 11317 [2024-11-02 11:21:16,307 INFO L226 Difference]: Without dead ends: 9051 [2024-11-02 11:21:16,315 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-02 11:21:16,315 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 61 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 11:21:16,316 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 34 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 11:21:16,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9051 states. [2024-11-02 11:21:16,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9051 to 9051. [2024-11-02 11:21:16,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9051 states, 8992 states have (on average 4.1161032028469755) internal successors, (37012), 9050 states have internal predecessors, (37012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:16,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9051 states to 9051 states and 37012 transitions. [2024-11-02 11:21:16,640 INFO L78 Accepts]: Start accepts. Automaton has 9051 states and 37012 transitions. Word has length 15 [2024-11-02 11:21:16,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:21:16,641 INFO L471 AbstractCegarLoop]: Abstraction has 9051 states and 37012 transitions. [2024-11-02 11:21:16,641 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:16,642 INFO L276 IsEmpty]: Start isEmpty. Operand 9051 states and 37012 transitions. [2024-11-02 11:21:16,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-02 11:21:16,645 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:21:16,645 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:21:16,675 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028cade9-74ee-42e4-b20e-84ad0fbaa0dc/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-02 11:21:16,846 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028cade9-74ee-42e4-b20e-84ad0fbaa0dc/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-02 11:21:16,846 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-02 11:21:16,847 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:21:16,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1955715499, now seen corresponding path program 1 times [2024-11-02 11:21:16,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:21:16,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943287772] [2024-11-02 11:21:16,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:16,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:21:16,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:16,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-02 11:21:16,931 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:21:16,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943287772] [2024-11-02 11:21:16,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943287772] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:21:16,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:21:16,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 11:21:16,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728739832] [2024-11-02 11:21:16,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:21:16,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:21:16,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:21:16,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:21:16,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:21:16,932 INFO L87 Difference]: Start difference. First operand 9051 states and 37012 transitions. Second operand has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:17,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:21:17,424 INFO L93 Difference]: Finished difference Result 22526 states and 93927 transitions. [2024-11-02 11:21:17,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:21:17,424 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-11-02 11:21:17,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:21:17,540 INFO L225 Difference]: With dead ends: 22526 [2024-11-02 11:21:17,540 INFO L226 Difference]: Without dead ends: 13792 [2024-11-02 11:21:17,553 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:21:17,554 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 46 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:21:17,554 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 34 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:21:17,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13792 states. [2024-11-02 11:21:17,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13792 to 12613. [2024-11-02 11:21:17,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12613 states, 12536 states have (on average 4.145899808551372) internal successors, (51973), 12612 states have internal predecessors, (51973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:17,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12613 states to 12613 states and 51973 transitions. [2024-11-02 11:21:18,019 INFO L78 Accepts]: Start accepts. Automaton has 12613 states and 51973 transitions. Word has length 20 [2024-11-02 11:21:18,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:21:18,020 INFO L471 AbstractCegarLoop]: Abstraction has 12613 states and 51973 transitions. [2024-11-02 11:21:18,020 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:18,020 INFO L276 IsEmpty]: Start isEmpty. Operand 12613 states and 51973 transitions. [2024-11-02 11:21:18,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-02 11:21:18,023 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:21:18,024 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:21:18,024 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-02 11:21:18,024 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-02 11:21:18,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:21:18,024 INFO L85 PathProgramCache]: Analyzing trace with hash -138580966, now seen corresponding path program 1 times [2024-11-02 11:21:18,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:21:18,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972215128] [2024-11-02 11:21:18,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:18,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:21:18,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:18,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-02 11:21:18,172 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:21:18,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972215128] [2024-11-02 11:21:18,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972215128] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:21:18,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:21:18,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 11:21:18,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388878866] [2024-11-02 11:21:18,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:21:18,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 11:21:18,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:21:18,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 11:21:18,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 11:21:18,175 INFO L87 Difference]: Start difference. First operand 12613 states and 51973 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:18,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:21:18,429 INFO L93 Difference]: Finished difference Result 12613 states and 51973 transitions. [2024-11-02 11:21:18,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 11:21:18,430 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-11-02 11:21:18,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:21:18,534 INFO L225 Difference]: With dead ends: 12613 [2024-11-02 11:21:18,534 INFO L226 Difference]: Without dead ends: 11300 [2024-11-02 11:21:18,540 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 11:21:18,541 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 44 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:21:18,541 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 34 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:21:18,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11300 states. [2024-11-02 11:21:18,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11300 to 11300. [2024-11-02 11:21:18,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11300 states, 11255 states have (on average 4.153887161261662) internal successors, (46752), 11299 states have internal predecessors, (46752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:19,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11300 states to 11300 states and 46752 transitions. [2024-11-02 11:21:19,306 INFO L78 Accepts]: Start accepts. Automaton has 11300 states and 46752 transitions. Word has length 24 [2024-11-02 11:21:19,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:21:19,306 INFO L471 AbstractCegarLoop]: Abstraction has 11300 states and 46752 transitions. [2024-11-02 11:21:19,306 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:19,306 INFO L276 IsEmpty]: Start isEmpty. Operand 11300 states and 46752 transitions. [2024-11-02 11:21:19,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-02 11:21:19,310 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:21:19,310 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:21:19,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-02 11:21:19,310 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-02 11:21:19,310 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:21:19,311 INFO L85 PathProgramCache]: Analyzing trace with hash -138580965, now seen corresponding path program 1 times [2024-11-02 11:21:19,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:21:19,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721789067] [2024-11-02 11:21:19,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:19,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:21:19,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:19,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-02 11:21:19,442 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:21:19,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721789067] [2024-11-02 11:21:19,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721789067] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:21:19,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:21:19,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 11:21:19,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415122574] [2024-11-02 11:21:19,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:21:19,443 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 11:21:19,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:21:19,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 11:21:19,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 11:21:19,444 INFO L87 Difference]: Start difference. First operand 11300 states and 46752 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:19,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:21:19,809 INFO L93 Difference]: Finished difference Result 23866 states and 98027 transitions. [2024-11-02 11:21:19,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 11:21:19,810 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-11-02 11:21:19,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:21:19,955 INFO L225 Difference]: With dead ends: 23866 [2024-11-02 11:21:19,956 INFO L226 Difference]: Without dead ends: 15603 [2024-11-02 11:21:19,978 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-02 11:21:19,979 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 43 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 11:21:19,979 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 51 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 11:21:19,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15603 states. [2024-11-02 11:21:20,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15603 to 14418. [2024-11-02 11:21:20,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14418 states, 14369 states have (on average 4.131324378871181) internal successors, (59363), 14417 states have internal predecessors, (59363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:20,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14418 states to 14418 states and 59363 transitions. [2024-11-02 11:21:20,348 INFO L78 Accepts]: Start accepts. Automaton has 14418 states and 59363 transitions. Word has length 24 [2024-11-02 11:21:20,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:21:20,349 INFO L471 AbstractCegarLoop]: Abstraction has 14418 states and 59363 transitions. [2024-11-02 11:21:20,349 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:20,349 INFO L276 IsEmpty]: Start isEmpty. Operand 14418 states and 59363 transitions. [2024-11-02 11:21:20,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-02 11:21:20,356 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:21:20,356 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:21:20,356 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-02 11:21:20,357 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-02 11:21:20,357 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:21:20,357 INFO L85 PathProgramCache]: Analyzing trace with hash 2112764568, now seen corresponding path program 1 times [2024-11-02 11:21:20,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:21:20,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301596931] [2024-11-02 11:21:20,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:20,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:21:20,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:20,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:21:20,809 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:21:20,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301596931] [2024-11-02 11:21:20,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301596931] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:21:20,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:21:20,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 11:21:20,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274189978] [2024-11-02 11:21:20,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:21:20,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:21:20,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:21:20,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:21:20,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:21:20,810 INFO L87 Difference]: Start difference. First operand 14418 states and 59363 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:21,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:21:21,036 INFO L93 Difference]: Finished difference Result 14904 states and 60890 transitions. [2024-11-02 11:21:21,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:21:21,036 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-11-02 11:21:21,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:21:21,128 INFO L225 Difference]: With dead ends: 14904 [2024-11-02 11:21:21,128 INFO L226 Difference]: Without dead ends: 14520 [2024-11-02 11:21:21,133 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:21:21,134 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 16 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:21:21,134 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 34 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:21:21,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14520 states. [2024-11-02 11:21:21,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14520 to 14248. [2024-11-02 11:21:21,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14248 states, 14199 states have (on average 4.135291217691386) internal successors, (58717), 14247 states have internal predecessors, (58717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:21,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14248 states to 14248 states and 58717 transitions. [2024-11-02 11:21:21,497 INFO L78 Accepts]: Start accepts. Automaton has 14248 states and 58717 transitions. Word has length 24 [2024-11-02 11:21:21,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:21:21,498 INFO L471 AbstractCegarLoop]: Abstraction has 14248 states and 58717 transitions. [2024-11-02 11:21:21,498 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:21,498 INFO L276 IsEmpty]: Start isEmpty. Operand 14248 states and 58717 transitions. [2024-11-02 11:21:21,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-02 11:21:21,505 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:21:21,505 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:21:21,505 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-02 11:21:21,505 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-02 11:21:21,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:21:21,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1933772393, now seen corresponding path program 1 times [2024-11-02 11:21:21,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:21:21,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873122399] [2024-11-02 11:21:21,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:21,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:21:21,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:21,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-02 11:21:21,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:21:21,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873122399] [2024-11-02 11:21:21,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873122399] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:21:21,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211768993] [2024-11-02 11:21:21,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:21,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:21:21,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028cade9-74ee-42e4-b20e-84ad0fbaa0dc/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:21:21,859 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028cade9-74ee-42e4-b20e-84ad0fbaa0dc/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:21:21,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028cade9-74ee-42e4-b20e-84ad0fbaa0dc/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 11:21:21,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:21,977 INFO L255 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-02 11:21:21,980 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:21:22,129 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-02 11:21:22,129 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 11:21:22,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211768993] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:21:22,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 11:21:22,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2024-11-02 11:21:22,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34816728] [2024-11-02 11:21:22,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:21:22,130 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 11:21:22,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:21:22,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 11:21:22,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-02 11:21:22,131 INFO L87 Difference]: Start difference. First operand 14248 states and 58717 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:22,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:21:22,543 INFO L93 Difference]: Finished difference Result 14248 states and 58717 transitions. [2024-11-02 11:21:22,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 11:21:22,543 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-11-02 11:21:22,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:21:22,656 INFO L225 Difference]: With dead ends: 14248 [2024-11-02 11:21:22,656 INFO L226 Difference]: Without dead ends: 12966 [2024-11-02 11:21:22,664 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-02 11:21:22,665 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 40 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:21:22,665 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 34 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:21:22,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12966 states. [2024-11-02 11:21:23,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12966 to 12966. [2024-11-02 11:21:23,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12966 states, 12941 states have (on average 4.143342863766324) internal successors, (53619), 12965 states have internal predecessors, (53619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:23,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12966 states to 12966 states and 53619 transitions. [2024-11-02 11:21:23,107 INFO L78 Accepts]: Start accepts. Automaton has 12966 states and 53619 transitions. Word has length 26 [2024-11-02 11:21:23,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:21:23,108 INFO L471 AbstractCegarLoop]: Abstraction has 12966 states and 53619 transitions. [2024-11-02 11:21:23,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:23,108 INFO L276 IsEmpty]: Start isEmpty. Operand 12966 states and 53619 transitions. [2024-11-02 11:21:23,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-02 11:21:23,115 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:21:23,115 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:21:23,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028cade9-74ee-42e4-b20e-84ad0fbaa0dc/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-02 11:21:23,315 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028cade9-74ee-42e4-b20e-84ad0fbaa0dc/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-02 11:21:23,315 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-02 11:21:23,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:21:23,316 INFO L85 PathProgramCache]: Analyzing trace with hash -32253889, now seen corresponding path program 1 times [2024-11-02 11:21:23,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:21:23,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275764668] [2024-11-02 11:21:23,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:23,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:21:23,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:23,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 11:21:23,376 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:21:23,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275764668] [2024-11-02 11:21:23,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275764668] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:21:23,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:21:23,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 11:21:23,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523755140] [2024-11-02 11:21:23,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:21:23,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:21:23,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:21:23,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:21:23,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:21:23,378 INFO L87 Difference]: Start difference. First operand 12966 states and 53619 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:23,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:21:23,683 INFO L93 Difference]: Finished difference Result 23540 states and 98526 transitions. [2024-11-02 11:21:23,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:21:23,683 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-11-02 11:21:23,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:21:23,766 INFO L225 Difference]: With dead ends: 23540 [2024-11-02 11:21:23,766 INFO L226 Difference]: Without dead ends: 11065 [2024-11-02 11:21:23,784 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:21:23,785 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 31 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:21:23,785 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 32 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:21:23,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11065 states. [2024-11-02 11:21:24,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11065 to 10054. [2024-11-02 11:21:24,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10054 states, 10043 states have (on average 4.153639350791596) internal successors, (41715), 10053 states have internal predecessors, (41715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:24,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10054 states to 10054 states and 41715 transitions. [2024-11-02 11:21:24,343 INFO L78 Accepts]: Start accepts. Automaton has 10054 states and 41715 transitions. Word has length 26 [2024-11-02 11:21:24,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:21:24,343 INFO L471 AbstractCegarLoop]: Abstraction has 10054 states and 41715 transitions. [2024-11-02 11:21:24,343 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:24,343 INFO L276 IsEmpty]: Start isEmpty. Operand 10054 states and 41715 transitions. [2024-11-02 11:21:24,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-02 11:21:24,353 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:21:24,353 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:21:24,353 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-02 11:21:24,353 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-02 11:21:24,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:21:24,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1712602440, now seen corresponding path program 1 times [2024-11-02 11:21:24,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:21:24,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976510847] [2024-11-02 11:21:24,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:24,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:21:24,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:24,433 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-02 11:21:24,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:21:24,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976510847] [2024-11-02 11:21:24,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976510847] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:21:24,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:21:24,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 11:21:24,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517897666] [2024-11-02 11:21:24,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:21:24,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:21:24,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:21:24,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:21:24,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:21:24,435 INFO L87 Difference]: Start difference. First operand 10054 states and 41715 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:24,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:21:24,812 INFO L93 Difference]: Finished difference Result 21712 states and 92095 transitions. [2024-11-02 11:21:24,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:21:24,813 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2024-11-02 11:21:24,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:21:24,940 INFO L225 Difference]: With dead ends: 21712 [2024-11-02 11:21:24,940 INFO L226 Difference]: Without dead ends: 13155 [2024-11-02 11:21:24,962 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:21:24,963 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 31 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:21:24,963 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 30 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:21:24,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13155 states. [2024-11-02 11:21:25,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13155 to 12144. [2024-11-02 11:21:25,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12144 states, 12133 states have (on average 4.165993571251957) internal successors, (50546), 12143 states have internal predecessors, (50546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:25,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12144 states to 12144 states and 50546 transitions.