./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-broom/dll-fst-shared.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1040c8-39c1-499d-893d-3df9cc3f5930/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1040c8-39c1-499d-893d-3df9cc3f5930/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_df1040c8-39c1-499d-893d-3df9cc3f5930/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1040c8-39c1-499d-893d-3df9cc3f5930/bin/utaipan-verify-DbMuA5NWw2/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-broom/dll-fst-shared.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1040c8-39c1-499d-893d-3df9cc3f5930/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1040c8-39c1-499d-893d-3df9cc3f5930/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 64bit --witnessprinter.graph.data.programhash 39ed728cb409795523ff80ba60708f74ca221f895fcd408de5b511302ce35f8c --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:36:16,933 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:36:17,053 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1040c8-39c1-499d-893d-3df9cc3f5930/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2024-11-02 12:36:17,061 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:36:17,061 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:36:17,089 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:36:17,090 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:36:17,090 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:36:17,091 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:36:17,091 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:36:17,091 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:36:17,092 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:36:17,092 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:36:17,092 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:36:17,093 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:36:17,093 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:36:17,093 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:36:17,094 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:36:17,094 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:36:17,094 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:36:17,095 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:36:17,097 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:36:17,098 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-02 12:36:17,098 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-02 12:36:17,098 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:36:17,099 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:36:17,099 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:36:17,099 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-02 12:36:17,099 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-02 12:36:17,100 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-02 12:36:17,100 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:36:17,100 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-02 12:36:17,100 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:36:17,100 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-02 12:36:17,103 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:36:17,103 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:36:17,103 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:36:17,104 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:36:17,104 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:36:17,104 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:36:17,104 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:36:17,105 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:36:17,105 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:36:17,105 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:36:17,106 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:36:17,106 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:36:17,106 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_df1040c8-39c1-499d-893d-3df9cc3f5930/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1040c8-39c1-499d-893d-3df9cc3f5930/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39ed728cb409795523ff80ba60708f74ca221f895fcd408de5b511302ce35f8c [2024-11-02 12:36:17,458 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:36:17,507 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:36:17,510 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:36:17,515 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:36:17,516 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:36:17,517 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1040c8-39c1-499d-893d-3df9cc3f5930/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/memsafety-broom/dll-fst-shared.i Unable to find full path for "g++" [2024-11-02 12:36:19,760 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:36:20,080 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:36:20,083 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1040c8-39c1-499d-893d-3df9cc3f5930/sv-benchmarks/c/memsafety-broom/dll-fst-shared.i [2024-11-02 12:36:20,124 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1040c8-39c1-499d-893d-3df9cc3f5930/bin/utaipan-verify-DbMuA5NWw2/data/fc68c284c/a63e4a07699944af8ad2ba5575105d58/FLAG007c72072 [2024-11-02 12:36:20,147 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1040c8-39c1-499d-893d-3df9cc3f5930/bin/utaipan-verify-DbMuA5NWw2/data/fc68c284c/a63e4a07699944af8ad2ba5575105d58 [2024-11-02 12:36:20,152 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:36:20,153 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:36:20,155 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:36:20,155 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:36:20,161 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:36:20,162 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:36:20" (1/1) ... [2024-11-02 12:36:20,163 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c962eae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:20, skipping insertion in model container [2024-11-02 12:36:20,163 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:36:20" (1/1) ... [2024-11-02 12:36:20,233 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:36:20,676 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:36:20,686 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:36:20,756 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:36:20,790 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:36:20,790 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:20 WrapperNode [2024-11-02 12:36:20,791 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:36:20,792 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:36:20,792 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:36:20,792 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:36:20,800 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:20" (1/1) ... [2024-11-02 12:36:20,818 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:20" (1/1) ... [2024-11-02 12:36:20,847 INFO L138 Inliner]: procedures = 121, calls = 26, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 78 [2024-11-02 12:36:20,848 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:36:20,848 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:36:20,848 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:36:20,849 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:36:20,861 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:20" (1/1) ... [2024-11-02 12:36:20,861 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:20" (1/1) ... [2024-11-02 12:36:20,873 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:20" (1/1) ... [2024-11-02 12:36:20,873 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:20" (1/1) ... [2024-11-02 12:36:20,884 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:20" (1/1) ... [2024-11-02 12:36:20,891 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:20" (1/1) ... [2024-11-02 12:36:20,893 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:20" (1/1) ... [2024-11-02 12:36:20,898 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:20" (1/1) ... [2024-11-02 12:36:20,900 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:36:20,905 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:36:20,906 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:36:20,906 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:36:20,907 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:20" (1/1) ... [2024-11-02 12:36:20,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:36:20,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1040c8-39c1-499d-893d-3df9cc3f5930/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:36:20,946 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1040c8-39c1-499d-893d-3df9cc3f5930/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:36:20,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1040c8-39c1-499d-893d-3df9cc3f5930/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:36:21,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-02 12:36:21,006 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero [2024-11-02 12:36:21,006 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero [2024-11-02 12:36:21,006 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-02 12:36:21,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-02 12:36:21,007 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-02 12:36:21,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-02 12:36:21,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:36:21,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:36:21,165 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:36:21,167 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:36:21,557 INFO L? ?]: Removed 88 outVars from TransFormulas that were not future-live. [2024-11-02 12:36:21,558 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:36:21,637 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:36:21,637 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-02 12:36:21,638 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:36:21 BoogieIcfgContainer [2024-11-02 12:36:21,638 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:36:21,644 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:36:21,644 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:36:21,648 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:36:21,648 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:36:20" (1/3) ... [2024-11-02 12:36:21,649 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eae8fe3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:36:21, skipping insertion in model container [2024-11-02 12:36:21,650 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:20" (2/3) ... [2024-11-02 12:36:21,651 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eae8fe3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:36:21, skipping insertion in model container [2024-11-02 12:36:21,652 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:36:21" (3/3) ... [2024-11-02 12:36:21,653 INFO L112 eAbstractionObserver]: Analyzing ICFG dll-fst-shared.i [2024-11-02 12:36:21,673 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:36:21,673 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 35 error locations. [2024-11-02 12:36:21,730 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:36:21,738 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;@78fb8efd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:36:21,738 INFO L334 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2024-11-02 12:36:21,745 INFO L276 IsEmpty]: Start isEmpty. Operand has 69 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 65 states have internal predecessors, (70), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 12:36:21,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-02 12:36:21,754 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:21,755 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-02 12:36:21,756 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-02 12:36:21,762 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:21,763 INFO L85 PathProgramCache]: Analyzing trace with hash 5153845, now seen corresponding path program 1 times [2024-11-02 12:36:21,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:21,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756306689] [2024-11-02 12:36:21,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:21,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:21,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:22,074 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 12:36:22,075 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:22,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756306689] [2024-11-02 12:36:22,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756306689] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:36:22,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:36:22,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 12:36:22,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573469944] [2024-11-02 12:36:22,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:36:22,084 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:36:22,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:36:22,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:36:22,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:36:22,128 INFO L87 Difference]: Start difference. First operand has 69 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 65 states have internal predecessors, (70), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:36:22,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:36:22,300 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2024-11-02 12:36:22,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:36:22,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-02 12:36:22,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:36:22,312 INFO L225 Difference]: With dead ends: 67 [2024-11-02 12:36:22,313 INFO L226 Difference]: Without dead ends: 66 [2024-11-02 12:36:22,315 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 12:36:22,322 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 1 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:36:22,324 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 85 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:36:22,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-02 12:36:22,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-11-02 12:36:22,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 30 states have (on average 2.2) internal successors, (66), 62 states have internal predecessors, (66), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 12:36:22,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2024-11-02 12:36:22,379 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 4 [2024-11-02 12:36:22,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:36:22,380 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2024-11-02 12:36:22,381 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:36:22,381 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2024-11-02 12:36:22,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-02 12:36:22,381 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:22,382 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-02 12:36:22,382 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:36:22,382 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-02 12:36:22,383 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:22,383 INFO L85 PathProgramCache]: Analyzing trace with hash 5153846, now seen corresponding path program 1 times [2024-11-02 12:36:22,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:22,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945855679] [2024-11-02 12:36:22,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:22,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:22,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:22,493 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 12:36:22,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:22,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945855679] [2024-11-02 12:36:22,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945855679] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:36:22,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:36:22,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 12:36:22,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994557454] [2024-11-02 12:36:22,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:36:22,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:36:22,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:36:22,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:36:22,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:36:22,499 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:36:22,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:36:22,610 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2024-11-02 12:36:22,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:36:22,611 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-02 12:36:22,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:36:22,612 INFO L225 Difference]: With dead ends: 64 [2024-11-02 12:36:22,612 INFO L226 Difference]: Without dead ends: 64 [2024-11-02 12:36:22,612 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 12:36:22,614 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 1 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:36:22,615 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 90 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:36:22,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-02 12:36:22,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2024-11-02 12:36:22,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 60 states have internal predecessors, (64), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 12:36:22,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2024-11-02 12:36:22,622 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 4 [2024-11-02 12:36:22,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:36:22,623 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2024-11-02 12:36:22,623 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:36:22,623 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2024-11-02 12:36:22,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-02 12:36:22,624 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:22,624 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:36:22,624 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 12:36:22,624 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-02 12:36:22,625 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:22,625 INFO L85 PathProgramCache]: Analyzing trace with hash 863364339, now seen corresponding path program 1 times [2024-11-02 12:36:22,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:22,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559671304] [2024-11-02 12:36:22,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:22,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:22,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:22,859 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 12:36:22,860 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:22,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559671304] [2024-11-02 12:36:22,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559671304] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:36:22,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:36:22,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 12:36:22,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517851708] [2024-11-02 12:36:22,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:36:22,865 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:36:22,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:36:22,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:36:22,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:36:22,867 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-02 12:36:22,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:36:22,968 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2024-11-02 12:36:22,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:36:22,968 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2024-11-02 12:36:22,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:36:22,971 INFO L225 Difference]: With dead ends: 67 [2024-11-02 12:36:22,971 INFO L226 Difference]: Without dead ends: 67 [2024-11-02 12:36:22,972 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 12:36:22,973 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 7 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:36:22,974 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 83 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:36:22,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-02 12:36:22,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2024-11-02 12:36:22,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 30 states have (on average 2.1) internal successors, (63), 59 states have internal predecessors, (63), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 12:36:22,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2024-11-02 12:36:22,986 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 8 [2024-11-02 12:36:22,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:36:22,987 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2024-11-02 12:36:22,987 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-02 12:36:22,987 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2024-11-02 12:36:22,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-02 12:36:22,988 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:22,988 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:36:22,988 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 12:36:22,990 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-02 12:36:22,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:22,991 INFO L85 PathProgramCache]: Analyzing trace with hash 863364338, now seen corresponding path program 1 times [2024-11-02 12:36:22,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:22,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997672991] [2024-11-02 12:36:22,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:22,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:23,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:23,099 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 12:36:23,100 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:23,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997672991] [2024-11-02 12:36:23,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997672991] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:36:23,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:36:23,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 12:36:23,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066764835] [2024-11-02 12:36:23,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:36:23,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:36:23,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:36:23,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:36:23,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:36:23,103 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-02 12:36:23,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:36:23,218 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2024-11-02 12:36:23,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:36:23,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2024-11-02 12:36:23,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:36:23,221 INFO L225 Difference]: With dead ends: 66 [2024-11-02 12:36:23,221 INFO L226 Difference]: Without dead ends: 66 [2024-11-02 12:36:23,222 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 12:36:23,224 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 7 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:36:23,226 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 78 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:36:23,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-02 12:36:23,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2024-11-02 12:36:23,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 30 states have (on average 2.066666666666667) internal successors, (62), 58 states have internal predecessors, (62), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 12:36:23,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2024-11-02 12:36:23,241 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 8 [2024-11-02 12:36:23,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:36:23,242 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2024-11-02 12:36:23,242 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-02 12:36:23,242 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2024-11-02 12:36:23,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-02 12:36:23,243 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:23,243 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:36:23,243 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-02 12:36:23,243 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-02 12:36:23,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:23,247 INFO L85 PathProgramCache]: Analyzing trace with hash 994494627, now seen corresponding path program 1 times [2024-11-02 12:36:23,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:23,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503018225] [2024-11-02 12:36:23,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:23,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:23,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:23,522 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 12:36:23,523 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:23,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503018225] [2024-11-02 12:36:23,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503018225] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:36:23,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:36:23,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-02 12:36:23,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543770570] [2024-11-02 12:36:23,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:36:23,526 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-02 12:36:23,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:36:23,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-02 12:36:23,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-02 12:36:23,528 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 7 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-02 12:36:23,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:36:23,715 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2024-11-02 12:36:23,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-02 12:36:23,717 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2024-11-02 12:36:23,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:36:23,717 INFO L225 Difference]: With dead ends: 62 [2024-11-02 12:36:23,718 INFO L226 Difference]: Without dead ends: 62 [2024-11-02 12:36:23,718 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-02 12:36:23,720 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 24 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:36:23,724 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 127 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:36:23,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-02 12:36:23,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2024-11-02 12:36:23,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 54 states have internal predecessors, (58), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 12:36:23,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2024-11-02 12:36:23,733 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 9 [2024-11-02 12:36:23,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:36:23,735 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2024-11-02 12:36:23,735 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-02 12:36:23,735 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2024-11-02 12:36:23,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-02 12:36:23,736 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:23,736 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:36:23,736 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-02 12:36:23,736 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-02 12:36:23,737 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:23,737 INFO L85 PathProgramCache]: Analyzing trace with hash 994494628, now seen corresponding path program 1 times [2024-11-02 12:36:23,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:23,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310904272] [2024-11-02 12:36:23,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:23,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:23,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:24,086 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 12:36:24,086 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:24,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310904272] [2024-11-02 12:36:24,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310904272] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:36:24,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:36:24,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-02 12:36:24,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74965318] [2024-11-02 12:36:24,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:36:24,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-02 12:36:24,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:36:24,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-02 12:36:24,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:36:24,089 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 6 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-02 12:36:24,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:36:24,286 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2024-11-02 12:36:24,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-02 12:36:24,287 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2024-11-02 12:36:24,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:36:24,290 INFO L225 Difference]: With dead ends: 61 [2024-11-02 12:36:24,292 INFO L226 Difference]: Without dead ends: 61 [2024-11-02 12:36:24,292 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:36:24,293 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 4 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:36:24,293 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 120 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:36:24,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-02 12:36:24,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2024-11-02 12:36:24,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 30 states have (on average 1.9) internal successors, (57), 53 states have internal predecessors, (57), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 12:36:24,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2024-11-02 12:36:24,302 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 9 [2024-11-02 12:36:24,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:36:24,303 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2024-11-02 12:36:24,303 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-02 12:36:24,303 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2024-11-02 12:36:24,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-02 12:36:24,304 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:24,304 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:36:24,304 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-02 12:36:24,305 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-02 12:36:24,305 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:24,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1066816035, now seen corresponding path program 1 times [2024-11-02 12:36:24,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:24,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536950767] [2024-11-02 12:36:24,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:24,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:24,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:24,383 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 12:36:24,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:24,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536950767] [2024-11-02 12:36:24,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536950767] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:36:24,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:36:24,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:36:24,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667286779] [2024-11-02 12:36:24,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:36:24,384 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 12:36:24,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:36:24,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 12:36:24,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:36:24,386 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-02 12:36:24,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:36:24,520 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2024-11-02 12:36:24,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-02 12:36:24,521 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-11-02 12:36:24,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:36:24,522 INFO L225 Difference]: With dead ends: 80 [2024-11-02 12:36:24,522 INFO L226 Difference]: Without dead ends: 80 [2024-11-02 12:36:24,522 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:36:24,523 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 31 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:36:24,523 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 119 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:36:24,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-11-02 12:36:24,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 71. [2024-11-02 12:36:24,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 43 states have (on average 1.930232558139535) internal successors, (83), 66 states have internal predecessors, (83), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-02 12:36:24,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 89 transitions. [2024-11-02 12:36:24,529 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 89 transitions. Word has length 14 [2024-11-02 12:36:24,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:36:24,530 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 89 transitions. [2024-11-02 12:36:24,530 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-02 12:36:24,530 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 89 transitions. [2024-11-02 12:36:24,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-02 12:36:24,531 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:24,531 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:36:24,531 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-02 12:36:24,531 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-02 12:36:24,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:24,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1066816036, now seen corresponding path program 1 times [2024-11-02 12:36:24,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:24,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38335847] [2024-11-02 12:36:24,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:24,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:24,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:24,722 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 12:36:24,723 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:24,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38335847] [2024-11-02 12:36:24,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38335847] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:36:24,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:36:24,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-02 12:36:24,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895280893] [2024-11-02 12:36:24,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:36:24,724 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-02 12:36:24,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:36:24,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-02 12:36:24,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-02 12:36:24,725 INFO L87 Difference]: Start difference. First operand 71 states and 89 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-02 12:36:24,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:36:24,925 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2024-11-02 12:36:24,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-02 12:36:24,926 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-11-02 12:36:24,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:36:24,927 INFO L225 Difference]: With dead ends: 81 [2024-11-02 12:36:24,927 INFO L226 Difference]: Without dead ends: 81 [2024-11-02 12:36:24,927 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-02 12:36:24,928 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 18 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:36:24,929 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 239 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:36:24,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-02 12:36:24,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 75. [2024-11-02 12:36:24,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 47 states have (on average 1.9148936170212767) internal successors, (90), 70 states have internal predecessors, (90), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-02 12:36:24,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 96 transitions. [2024-11-02 12:36:24,941 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 96 transitions. Word has length 14 [2024-11-02 12:36:24,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:36:24,941 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 96 transitions. [2024-11-02 12:36:24,942 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-02 12:36:24,942 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 96 transitions. [2024-11-02 12:36:24,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-02 12:36:24,945 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:24,945 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:36:24,945 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-02 12:36:24,946 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-02 12:36:24,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:24,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1288366734, now seen corresponding path program 1 times [2024-11-02 12:36:24,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:24,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910704568] [2024-11-02 12:36:24,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:24,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:24,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:25,082 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 12:36:25,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:25,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910704568] [2024-11-02 12:36:25,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910704568] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:36:25,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:36:25,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-02 12:36:25,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995075170] [2024-11-02 12:36:25,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:36:25,086 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-02 12:36:25,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:36:25,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-02 12:36:25,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-02 12:36:25,091 INFO L87 Difference]: Start difference. First operand 75 states and 96 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-02 12:36:25,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:36:25,181 INFO L93 Difference]: Finished difference Result 82 states and 106 transitions. [2024-11-02 12:36:25,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-02 12:36:25,182 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2024-11-02 12:36:25,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:36:25,183 INFO L225 Difference]: With dead ends: 82 [2024-11-02 12:36:25,187 INFO L226 Difference]: Without dead ends: 82 [2024-11-02 12:36:25,187 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-02 12:36:25,188 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 20 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:36:25,188 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 239 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:36:25,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-02 12:36:25,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2024-11-02 12:36:25,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 49 states have (on average 1.8571428571428572) internal successors, (91), 72 states have internal predecessors, (91), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-02 12:36:25,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 97 transitions. [2024-11-02 12:36:25,198 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 97 transitions. Word has length 15 [2024-11-02 12:36:25,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:36:25,198 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 97 transitions. [2024-11-02 12:36:25,198 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-02 12:36:25,199 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 97 transitions. [2024-11-02 12:36:25,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-02 12:36:25,199 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:25,200 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:36:25,200 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-02 12:36:25,200 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-02 12:36:25,201 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:25,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1288439037, now seen corresponding path program 1 times [2024-11-02 12:36:25,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:25,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210237544] [2024-11-02 12:36:25,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:25,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:25,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:25,257 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 12:36:25,257 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:25,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210237544] [2024-11-02 12:36:25,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210237544] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:36:25,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:36:25,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:36:25,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653331839] [2024-11-02 12:36:25,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:36:25,258 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:36:25,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:36:25,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:36:25,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:36:25,259 INFO L87 Difference]: Start difference. First operand 77 states and 97 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-02 12:36:25,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:36:25,359 INFO L93 Difference]: Finished difference Result 81 states and 104 transitions. [2024-11-02 12:36:25,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:36:25,359 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2024-11-02 12:36:25,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:36:25,360 INFO L225 Difference]: With dead ends: 81 [2024-11-02 12:36:25,360 INFO L226 Difference]: Without dead ends: 81 [2024-11-02 12:36:25,361 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:36:25,361 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 1 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:36:25,362 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 96 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:36:25,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-02 12:36:25,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2024-11-02 12:36:25,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 53 states have (on average 1.849056603773585) internal successors, (98), 76 states have internal predecessors, (98), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-02 12:36:25,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 104 transitions. [2024-11-02 12:36:25,367 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 104 transitions. Word has length 15 [2024-11-02 12:36:25,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:36:25,367 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 104 transitions. [2024-11-02 12:36:25,367 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-02 12:36:25,368 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 104 transitions. [2024-11-02 12:36:25,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-02 12:36:25,368 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:25,368 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:36:25,368 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-02 12:36:25,369 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-02 12:36:25,369 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:25,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1288439036, now seen corresponding path program 1 times [2024-11-02 12:36:25,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:25,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178347310] [2024-11-02 12:36:25,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:25,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:25,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:25,545 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 12:36:25,546 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:25,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178347310] [2024-11-02 12:36:25,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178347310] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:36:25,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:36:25,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-02 12:36:25,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536157711] [2024-11-02 12:36:25,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:36:25,547 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-02 12:36:25,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:36:25,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-02 12:36:25,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-02 12:36:25,548 INFO L87 Difference]: Start difference. First operand 81 states and 104 transitions. Second operand has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-02 12:36:25,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:36:25,706 INFO L93 Difference]: Finished difference Result 81 states and 102 transitions. [2024-11-02 12:36:25,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-02 12:36:25,706 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2024-11-02 12:36:25,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:36:25,707 INFO L225 Difference]: With dead ends: 81 [2024-11-02 12:36:25,708 INFO L226 Difference]: Without dead ends: 81 [2024-11-02 12:36:25,708 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-02 12:36:25,709 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 17 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:36:25,709 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 253 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:36:25,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-02 12:36:25,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2024-11-02 12:36:25,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 53 states have (on average 1.8113207547169812) internal successors, (96), 76 states have internal predecessors, (96), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-02 12:36:25,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 102 transitions. [2024-11-02 12:36:25,719 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 102 transitions. Word has length 15 [2024-11-02 12:36:25,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:36:25,719 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 102 transitions. [2024-11-02 12:36:25,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-02 12:36:25,719 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 102 transitions. [2024-11-02 12:36:25,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-02 12:36:25,720 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:25,720 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:36:25,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-02 12:36:25,721 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-02 12:36:25,722 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:25,722 INFO L85 PathProgramCache]: Analyzing trace with hash 239755371, now seen corresponding path program 1 times [2024-11-02 12:36:25,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:25,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195883234] [2024-11-02 12:36:25,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:25,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:25,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:25,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:36:25,949 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:25,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195883234] [2024-11-02 12:36:25,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195883234] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:36:25,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:36:25,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-02 12:36:25,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109450027] [2024-11-02 12:36:25,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:36:25,952 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-02 12:36:25,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:36:25,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-02 12:36:25,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-02 12:36:25,954 INFO L87 Difference]: Start difference. First operand 81 states and 102 transitions. Second operand has 7 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 12:36:26,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:36:26,144 INFO L93 Difference]: Finished difference Result 81 states and 101 transitions. [2024-11-02 12:36:26,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-02 12:36:26,145 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2024-11-02 12:36:26,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:36:26,145 INFO L225 Difference]: With dead ends: 81 [2024-11-02 12:36:26,146 INFO L226 Difference]: Without dead ends: 81 [2024-11-02 12:36:26,146 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-02 12:36:26,146 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 10 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:36:26,147 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 99 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:36:26,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-02 12:36:26,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2024-11-02 12:36:26,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 53 states have (on average 1.7924528301886793) internal successors, (95), 76 states have internal predecessors, (95), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-02 12:36:26,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 101 transitions. [2024-11-02 12:36:26,152 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 101 transitions. Word has length 17 [2024-11-02 12:36:26,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:36:26,152 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 101 transitions. [2024-11-02 12:36:26,152 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 12:36:26,153 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 101 transitions. [2024-11-02 12:36:26,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-02 12:36:26,153 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:26,153 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:36:26,154 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-02 12:36:26,154 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-02 12:36:26,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:26,155 INFO L85 PathProgramCache]: Analyzing trace with hash 239755372, now seen corresponding path program 1 times [2024-11-02 12:36:26,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:26,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125674284] [2024-11-02 12:36:26,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:26,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:26,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:26,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:36:26,452 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:26,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125674284] [2024-11-02 12:36:26,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125674284] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:36:26,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959398540] [2024-11-02 12:36:26,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:26,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:36:26,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1040c8-39c1-499d-893d-3df9cc3f5930/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:36:26,455 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1040c8-39c1-499d-893d-3df9cc3f5930/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:36:26,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df1040c8-39c1-499d-893d-3df9cc3f5930/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:36:26,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:26,582 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-02 12:36:26,591 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:36:26,810 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|))) is different from true [2024-11-02 12:36:26,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 12:36:26,864 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 16 treesize of output 11 [2024-11-02 12:36:26,879 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-02 12:36:26,880 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 12:36:26,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2024-11-02 12:36:26,906 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:36:27,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959398540] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:36:27,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [249944584] [2024-11-02 12:36:27,120 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-02 12:36:27,120 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:36:27,125 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:36:27,130 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:36:27,130 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:36:27,899 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 136 for LOIs [2024-11-02 12:36:28,115 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:36:56,582 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1927#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_create_~now~0#1.base_33| Int)) (and (<= (select |#length| |v_ULTIMATE.start_create_~now~0#1.base_33|) 7) (or (and (not (= |ULTIMATE.start_create_~data~0#1.base| 0)) (exists ((|v_#memory_$Pointer$.offset_63| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_63| |ULTIMATE.start_create_#t~ret8#1.base| (store (store (select |v_#memory_$Pointer$.offset_63| |ULTIMATE.start_create_#t~ret8#1.base|) 0 0) 8 0)))) (<= (+ |ULTIMATE.start_create_~data~0#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#memory_$Pointer$.base_63| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_66| (Array Int (Array Int Int)))) (= (store (store |v_#memory_$Pointer$.base_63| |ULTIMATE.start_create_~dll~0#1.base| (store (store (select |v_#memory_$Pointer$.base_63| |ULTIMATE.start_create_~dll~0#1.base|) 0 0) 8 0)) |ULTIMATE.start_create_~data~0#1.base| (store (select (store |v_#memory_$Pointer$.base_63| |ULTIMATE.start_create_~dll~0#1.base| (store (store (select |v_#memory_$Pointer$.base_63| |ULTIMATE.start_create_~dll~0#1.base|) 0 0) 8 0)) |ULTIMATE.start_create_~data~0#1.base|) 0 (select (select |v_#memory_$Pointer$.base_66| |ULTIMATE.start_create_~data~0#1.base|) 0))) |v_#memory_$Pointer$.base_66|)) (<= (+ |ULTIMATE.start_create_#t~ret8#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#memory_int_51| (Array Int (Array Int Int))) (|v_#memory_int_52| (Array Int (Array Int Int))) (|v_#memory_int_53| (Array Int (Array Int Int))) (|v_old(#memory_int)_AFTER_CALL_5| (Array Int (Array Int Int))) (|v_#memory_int_50| (Array Int (Array Int Int)))) (and (= (store |v_#memory_int_53| |ULTIMATE.start_create_~dll~0#1.base| (store (select |v_#memory_int_53| |ULTIMATE.start_create_~dll~0#1.base|) 8 (select (select |v_#memory_int_50| |ULTIMATE.start_create_~dll~0#1.base|) 8))) |v_#memory_int_50|) (= |v_#memory_int_51| (store |v_#memory_int_50| |ULTIMATE.start_create_~data~0#1.base| (store (select |v_#memory_int_50| |ULTIMATE.start_create_~data~0#1.base|) 0 (select (select |v_#memory_int_51| |ULTIMATE.start_create_~data~0#1.base|) 0)))) (= |v_#memory_int_53| (store |v_#memory_int_52| |ULTIMATE.start_create_~dll~0#1.base| (store (select |v_#memory_int_52| |ULTIMATE.start_create_~dll~0#1.base|) 0 (select (select |v_#memory_int_53| |ULTIMATE.start_create_~dll~0#1.base|) 0)))) (<= 0 (+ (select (select |v_#memory_int_51| |ULTIMATE.start_create_~data~0#1.base|) 0) 2147483648)) (= (store |v_#memory_int_51| |v_ULTIMATE.start_create_~now~0#1.base_33| (store (select |v_#memory_int_51| |v_ULTIMATE.start_create_~now~0#1.base_33|) 16 (select (select |v_old(#memory_int)_AFTER_CALL_5| |v_ULTIMATE.start_create_~now~0#1.base_33|) 16))) |v_old(#memory_int)_AFTER_CALL_5|) (<= (select (select |v_#memory_int_51| |ULTIMATE.start_create_~data~0#1.base|) 0) 2147483647))) (not (= |ULTIMATE.start_create_~dll~0#1.base| 0)) (exists ((|v_#length_68| (Array Int Int))) (= |#length| (store |v_#length_68| |ULTIMATE.start_create_#t~ret8#1.base| 24))) (= |ULTIMATE.start_create_~dll~0#1.base| |v_ULTIMATE.start_create_~now~0#1.base_33|) (exists ((|v_#valid_81| (Array Int Int))) (and (= (select |v_#valid_81| |ULTIMATE.start_create_~dll~0#1.base|) 0) (= (select |v_#valid_81| |ULTIMATE.start_create_~data~0#1.base|) 0))) (not (= |ULTIMATE.start_create_#t~ret8#1.base| 0)) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (exists ((|v_#length_66| (Array Int Int))) (<= 24 (select (store (store |v_#length_66| |ULTIMATE.start_create_~dll~0#1.base| 24) |ULTIMATE.start_create_~data~0#1.base| 4) |v_ULTIMATE.start_create_~now~0#1.base_33|))) (exists ((|v_#memory_$Pointer$.offset_66| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_67| (Array Int (Array Int Int)))) (= (store (store |v_#memory_$Pointer$.offset_67| |ULTIMATE.start_create_~dll~0#1.base| (store (store (select |v_#memory_$Pointer$.offset_67| |ULTIMATE.start_create_~dll~0#1.base|) 0 0) 8 0)) |ULTIMATE.start_create_~data~0#1.base| (store (select (store |v_#memory_$Pointer$.offset_67| |ULTIMATE.start_create_~dll~0#1.base| (store (store (select |v_#memory_$Pointer$.offset_67| |ULTIMATE.start_create_~dll~0#1.base|) 0 0) 8 0)) |ULTIMATE.start_create_~data~0#1.base|) 0 (select (select |v_#memory_$Pointer$.offset_66| |ULTIMATE.start_create_~data~0#1.base|) 0))) |v_#memory_$Pointer$.offset_66|)) (exists ((|v_#memory_$Pointer$.base_67| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_67| |ULTIMATE.start_create_#t~ret8#1.base| (store (store (select |v_#memory_$Pointer$.base_67| |ULTIMATE.start_create_#t~ret8#1.base|) 0 0) 8 0)))) (exists ((|v_#valid_79| (Array Int Int))) (and (= (select |v_#valid_79| |ULTIMATE.start_create_#t~ret8#1.base|) 0) (= (store |v_#valid_79| |ULTIMATE.start_create_#t~ret8#1.base| 1) |#valid|))) (exists ((|v_ULTIMATE.start_create_#t~nondet7#1_12| Int)) (and (<= |v_ULTIMATE.start_create_#t~nondet7#1_12| 2147483647) (<= 0 (+ |v_ULTIMATE.start_create_#t~nondet7#1_12| 2147483648)) (not (= |v_ULTIMATE.start_create_#t~nondet7#1_12| 0)))) (exists ((|v_#memory_int_48| (Array Int (Array Int Int))) (|v_#memory_int_49| (Array Int (Array Int Int)))) (and (= (store |v_#memory_int_48| |ULTIMATE.start_create_#t~ret8#1.base| (store (select |v_#memory_int_48| |ULTIMATE.start_create_#t~ret8#1.base|) 0 (select (select |v_#memory_int_49| |ULTIMATE.start_create_#t~ret8#1.base|) 0))) |v_#memory_int_49|) (= |#memory_int| (store |v_#memory_int_49| |ULTIMATE.start_create_#t~ret8#1.base| (store (select |v_#memory_int_49| |ULTIMATE.start_create_#t~ret8#1.base|) 8 (select (select |#memory_int| |ULTIMATE.start_create_#t~ret8#1.base|) 8)))))) (<= (+ |ULTIMATE.start_create_~dll~0#1.base| 1) |#StackHeapBarrier|)) (and (not (= |ULTIMATE.start_create_~data~0#1.base| 0)) (exists ((|v_#valid_82| (Array Int Int))) (and (= |#valid| (store |v_#valid_82| |ULTIMATE.start_create_#t~ret8#1.base| 1)) (= (select |v_#valid_82| |ULTIMATE.start_create_#t~ret8#1.base|) 0))) (exists ((|v_#memory_$Pointer$.offset_63| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_63| |ULTIMATE.start_create_#t~ret8#1.base| (store (store (select |v_#memory_$Pointer$.offset_63| |ULTIMATE.start_create_#t~ret8#1.base|) 0 0) 8 0)))) (<= (+ |ULTIMATE.start_create_~data~0#1.base| 1) |#StackHeapBarrier|) (<= (+ |ULTIMATE.start_create_#t~ret8#1.base| 1) |#StackHeapBarrier|) (not (= |ULTIMATE.start_create_~dll~0#1.base| 0)) (exists ((|v_#length_69| (Array Int Int))) (<= 24 (select (store (store |v_#length_69| |ULTIMATE.start_create_~dll~0#1.base| 24) |ULTIMATE.start_create_~data~0#1.base| 4) |v_ULTIMATE.start_create_~now~0#1.base_33|))) (= |ULTIMATE.start_create_~dll~0#1.base| |v_ULTIMATE.start_create_~now~0#1.base_33|) (exists ((|v_#length_66| (Array Int Int))) (= |#length| (store |v_#length_66| |ULTIMATE.start_create_#t~ret8#1.base| 24))) (exists ((|v_#memory_$Pointer$.offset_66| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_68| (Array Int (Array Int Int)))) (= (store (store |v_#memory_$Pointer$.offset_68| |ULTIMATE.start_create_~dll~0#1.base| (store (store (select |v_#memory_$Pointer$.offset_68| |ULTIMATE.start_create_~dll~0#1.base|) 0 0) 8 0)) |ULTIMATE.start_create_~data~0#1.base| (store (select (store |v_#memory_$Pointer$.offset_68| |ULTIMATE.start_create_~dll~0#1.base| (store (store (select |v_#memory_$Pointer$.offset_68| |ULTIMATE.start_create_~dll~0#1.base|) 0 0) 8 0)) |ULTIMATE.start_create_~data~0#1.base|) 0 (select (select |v_#memory_$Pointer$.offset_66| |ULTIMATE.start_create_~data~0#1.base|) 0))) |v_#memory_$Pointer$.offset_66|)) (not (= |ULTIMATE.start_create_#t~ret8#1.base| 0)) (exists ((|v_#valid_79| (Array Int Int))) (and (= (select |v_#valid_79| |ULTIMATE.start_create_~dll~0#1.base|) 0) (= (select |v_#valid_79| |ULTIMATE.start_create_~data~0#1.base|) 0))) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (exists ((|v_#memory_int_51| (Array Int (Array Int Int))) (|v_#memory_int_48| (Array Int (Array Int Int))) (|v_old(#memory_int)_AFTER_CALL_6| (Array Int (Array Int Int))) (|v_#memory_int_49| (Array Int (Array Int Int))) (|v_#memory_int_50| (Array Int (Array Int Int)))) (and (= |v_#memory_int_51| (store |v_#memory_int_50| |ULTIMATE.start_create_~data~0#1.base| (store (select |v_#memory_int_50| |ULTIMATE.start_create_~data~0#1.base|) 0 (select (select |v_#memory_int_51| |ULTIMATE.start_create_~data~0#1.base|) 0)))) (= (store |v_#memory_int_48| |ULTIMATE.start_create_~dll~0#1.base| (store (select |v_#memory_int_48| |ULTIMATE.start_create_~dll~0#1.base|) 0 (select (select |v_#memory_int_49| |ULTIMATE.start_create_~dll~0#1.base|) 0))) |v_#memory_int_49|) (= (store |v_#memory_int_51| |v_ULTIMATE.start_create_~now~0#1.base_33| (store (select |v_#memory_int_51| |v_ULTIMATE.start_create_~now~0#1.base_33|) 16 (select (select |v_old(#memory_int)_AFTER_CALL_6| |v_ULTIMATE.start_create_~now~0#1.base_33|) 16))) |v_old(#memory_int)_AFTER_CALL_6|) (<= 0 (+ (select (select |v_#memory_int_51| |ULTIMATE.start_create_~data~0#1.base|) 0) 2147483648)) (= |v_#memory_int_50| (store |v_#memory_int_49| |ULTIMATE.start_create_~dll~0#1.base| (store (select |v_#memory_int_49| |ULTIMATE.start_create_~dll~0#1.base|) 8 (select (select |v_#memory_int_50| |ULTIMATE.start_create_~dll~0#1.base|) 8)))) (<= (select (select |v_#memory_int_51| |ULTIMATE.start_create_~data~0#1.base|) 0) 2147483647))) (exists ((|v_#memory_int_54| (Array Int (Array Int Int))) (|v_#memory_int_55| (Array Int (Array Int Int)))) (and (= (store |v_#memory_int_54| |ULTIMATE.start_create_#t~ret8#1.base| (store (select |v_#memory_int_54| |ULTIMATE.start_create_#t~ret8#1.base|) 0 (select (select |v_#memory_int_55| |ULTIMATE.start_create_#t~ret8#1.base|) 0))) |v_#memory_int_55|) (= |#memory_int| (store |v_#memory_int_55| |ULTIMATE.start_create_#t~ret8#1.base| (store (select |v_#memory_int_55| |ULTIMATE.start_create_#t~ret8#1.base|) 8 (select (select |#memory_int| |ULTIMATE.start_create_#t~ret8#1.base|) 8)))))) (exists ((|v_#memory_$Pointer$.base_66| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_68| (Array Int (Array Int Int)))) (= (store (store |v_#memory_$Pointer$.base_68| |ULTIMATE.start_create_~dll~0#1.base| (store (store (select |v_#memory_$Pointer$.base_68| |ULTIMATE.start_create_~dll~0#1.base|) 0 0) 8 0)) |ULTIMATE.start_create_~data~0#1.base| (store (select (store |v_#memory_$Pointer$.base_68| |ULTIMATE.start_create_~dll~0#1.base| (store (store (select |v_#memory_$Pointer$.base_68| |ULTIMATE.start_create_~dll~0#1.base|) 0 0) 8 0)) |ULTIMATE.start_create_~data~0#1.base|) 0 (select (select |v_#memory_$Pointer$.base_66| |ULTIMATE.start_create_~data~0#1.base|) 0))) |v_#memory_$Pointer$.base_66|)) (exists ((|v_#memory_$Pointer$.base_63| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_63| |ULTIMATE.start_create_#t~ret8#1.base| (store (store (select |v_#memory_$Pointer$.base_63| |ULTIMATE.start_create_#t~ret8#1.base|) 0 0) 8 0)) |#memory_$Pointer$.base|)) (exists ((|v_ULTIMATE.start_create_#t~nondet7#1_12| Int)) (and (<= |v_ULTIMATE.start_create_#t~nondet7#1_12| 2147483647) (<= 0 (+ |v_ULTIMATE.start_create_#t~nondet7#1_12| 2147483648)) (not (= |v_ULTIMATE.start_create_#t~nondet7#1_12| 0)))) (<= (+ |ULTIMATE.start_create_~dll~0#1.base| 1) |#StackHeapBarrier|))))) (= |ULTIMATE.start_create_~data~0#1.offset| 0) (= |ULTIMATE.start_create_~dll~0#1.offset| 0) (= |ULTIMATE.start_create_#t~ret8#1.offset| 0))' at error location [2024-11-02 12:36:56,582 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:36:56,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 12:36:56,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2024-11-02 12:36:56,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914934659] [2024-11-02 12:36:56,583 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 12:36:56,583 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-02 12:36:56,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:36:56,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-02 12:36:56,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=796, Unknown=3, NotChecked=58, Total=992 [2024-11-02 12:36:56,584 INFO L87 Difference]: Start difference. First operand 81 states and 101 transitions. Second operand has 18 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4)